foxboro-870itec

7/26/2019 foxboro-870itec

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MI 611-212April 2009

Instruction

870ITEC IntelligentElectrochemical Transmitter

for Electrodeless Conductivity Measurements


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Contents

Figures..................................................................................................................................... v

Tables..................................................................................................................................... vi

Introduction .............................................................................................................................. 1

Quick Start ............................................................................................................................... 1Wiring .................................................................................................................................. 1Factory Default Passcode ...................................................................................................... 2Checking Factory Configuration .......................................................................................... 2Verifying Valid Measurements ............................................................................................. 2Basic Operation in Measure Mode ....................................................................................... 3Looking for More Information? ............................................................................................ 3

Reference Documents ............................................................................................................... 4

Specifications ............................................................................................................................ 4

Identification ............................................................................................................................ 6

Installation ................................................................................................................................ 6Unpacking ............................................................................................................................ 6Mounting ............................................................................................................................. 7Wiring .................................................................................................................................. 8

Operation ............................................................................................................................... 10Controls and Indicators ...................................................................................................... 10Error Messages ................................................................................................................... 12Passcode Access .................................................................................................................. 12

Viewing and Changing Data .............................................................................................. 12Measure .............................................................................................................................. 14Diagnostics ......................................................................................................................... 15Status ................................................................................................................................. 15Configuration ..................................................................................................................... 16Hold .................................................................................................................................. 32Calibration ......................................................................................................................... 33

Troubleshooting ...................................................................................................................... 38

Maintenance ........................................................................................................................... 39

Appendix A. Structure Diagrams ......................................................................................... 41

Top Level Structure Diagram .................................................................................................. 41

Appendix B. Configuration Table........................................................................................ 57

Index .................................................................................................................................... 63
http://611-212.pdf/http://611-212.pdf/


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v

Figures

1 Wiring ......................................................................................................................... 22 Supply Power vs. Load ................................................................................................. 53 Data Label .................................................................................................................... 64 Panel Mounting ........................................................................................................... 75 Surface Mounting ........................................................................................................ 76 Pipe Mounting ............................................................................................................. 87 Wiring ......................................................................................................................... 108 Indicators and Controls ................................................................................................ 119 Example of Structure Diagram ..................................................................................... 14

10 Sample Concentration Curves ...................................................................................... 2011 Reference Conductivity vs. Temperature Data ............................................................. 2312 Configured Conductivity vs. Temperature Data .......................................................... 2313 Reference Conductivity vs. Concentration Data ........................................................... 2514 Configured Conductivity vs. Concentration Data ........................................................ 2515 Connection of Loop Resistance .................................................................................... 37


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Tables

1 Product Safety Specifications ........................................................................................ 52 Recommended Conduit and Fittings ........................................................................... 93 Indicators and Controls ................................................................................................ 114 Diagnostic Errors ......................................................................................................... 155 Status Parameters ......................................................................................................... 166 Primary Scale in S/cm ................................................................................................ 187 Primary Scale in mS/cm ............................................................................................... 188 Primary Scale in Percent ............................................................................................... 199 Chemical Specific Temperature Compensations .......................................................... 21

10 Foxboro Sensor Data .................................................................................................... 2711 List of Characters ......................................................................................................... 3112 Example of Trigger Function ....................................................................................... 3213 Cell Factors .................................................................................................................. 3614 Temperature vs. RTD Resistance ................................................................................. 38


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IntroductionThe 870ITEC Intelligent Transmitter converts electrodeless conductivity measurements to a 4 to20 mA and/or digital output signal depending on the model selected and the configurationimplemented.

The analog only output version (Model 870ITEC-A) supports configuration, calibration, and

diagnostic troubleshooting locally at the front panel. The transmitter has one 4 to 20 mA dcoutput which can be software configured (connected) to temperature compensated measurement,uncompensated (absolute) measurement, or temperature.

The digital output version (Model 870ITEC-F) supports configuration, calibration, anddiagnostic troubleshooting locally at the front panel, via a PC-based configurator anywhere on thesignal leads, or from any I/A Series workstation via an Intelligent Transmitter Fieldbus Module.The digital output version supports either digital only communication or a hybrid 4 to 20 mAdc/digital communication as configured. When operating in either of these modes, thetransmitter continuously outputs three digital measurement values: temperature compensatedmeasurement, uncompensated (absolute) measurement, and temperature. In the 4 to 20 mAmode, you may assign the output to any one of the three measurement parameters.

Quick StartThe purpose of this section is to:

Help you to wire your transmitter

Familiarize you with the instrument configuration as received from the factory

Assist you in verifying that your transmitter is in calibration

Explain normal operation in Measure mode.

WiringYour 870IT is a 2-wire transmitter. As such, it transmits output over the same two wires throughwhich it receives power. If your transmitter was specified with analog communications(870ITEC-A), you must supply its power source. If it was specified with digital communications(870ITEC-F), power can be provided via the I/A Series Fieldbus Module. Connect thispower/output signal to the power terminals and the signals from your measurement sensor to theappropriate terminals near the top of the case as shown in Figure 1.

WARNING!

Wiring installation must comply with any existing local regulations.

WARNING!

A safety agency certified energy barrier must be used with this apparatus to meetagency certification requirements. See MI 611-206 (FM/CSA) or MI 611-208(ATEX) for details.


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Figure 1. Wiring

Factory Default PasscodeThe factory default passcode for both minor and major passcodes is 0800.

Checking Factory ConfigurationFollowing the structure diagrams in Appendix A and using the arrow keys, you can step throughthe product structure as configured in the factory. The factory default values are listed inAppendix B. There is space provided to make any notations you wish in the last column of thetable that comprises this appendix.

Verifying Valid Measurements

Your transmitter was calibrated at the factory. However, after you connect it to your sensor, youneed to do a single point calibration (in air if range is zero based) to zero the instrument. To dothis use the following procedure:

1. Press the Calibration key and enter the minor Passcode at the prompt.

2. At CALx SOLUTIONuse the Right arrow key to get to SOLUTION SINGLEPTandthen to SINGLEPT OFFSET, and to IMMERSE IN SOL 1.

3. Holding the sensor in air, press ENTER.

RTDMEASUREME

NT(BRN)

RTDRETURN(BLU

)

RTD3-WIRE(ORN

)*

INPUT POWER

CASE EARTH (GROUND)

PRIMARYSENSOR

DRIVE(BLK,WHT)

SENSORSCREEN

(SHIELD)(CLEAR)

SENSORRETURN

(RED)

SENSORRETURN

(CLEAR)

1 2 3 4 5 6 7 8

*MOST FOXBORO SENSORS CONTAIN

2-WIRE RTD ELEMENTS. TERMINAL 8

IS NOT USED IN THESE CASES

+

4

-20mACAL

PC-BASED

CONFIGURATOR


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4. Wait for the display READING XXXXXXXXto alternate with the message ENTERTO EDITand then press ENTERagain. Upon the prompt OFFSET, enter 0000.Press ENTER. When the calibration is complete, the display will read CALCOMPLETE.

5. Press the Measure key to go to Measure mode. Place your sensor in a known solutionand check the measurement.

Basic Operation in Measure ModeMeasure is the normal operating mode of your transmitter. The electrodeless conductivitymeasurement is shown on the top line of the display. The second line of your display shows theabsolute value of the measurement signal in S/cm or mS/cm, the output in 4 to 20 mA, or thetemperature, depending on your configuration. You can view one of the other two selections byusing the Up and Down arrow keys. The display will return to the configured selection when theconfigured TIMEOUTtime is reached. Configuration errors and transmitter and sensor errors arealso shown on your display while in the Measurement mode.

Looking for More Information?For more detailed information, refer to the following sections of this manual:

For installation information, refer to Installation on page 6.

For detailed explanation of the controls and indicators, refer to Controls and Indicatorson page 10.

For detailed configuration instructions, refer to Configuration on page 16.

For detailed calibration instructions, refer to Calibration on page 33.

For dimensional information, refer to DP 611-163.

General information on this and other electrochemical products are available on line atwww.ips.invensys.com(pull down Productsmenu and select Measurement & Instruments,then Documentation, then Specs, Instructions, Drawings, Parts).

If you need additional help, please call 1-866-746-6477 in the U.S.A. or contact your localInvensys Process Systems (IPS) representative.


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Reference Documents

SpecificationsSensors:

The 870ITEC Transmitter can be used with any 871EC Series ElectrodelessConductivity Sensor or 871FT Series Flow-Through Sensor. They can also be used withother electrically compatible sensors by entering the cell factor as part of the configurationprocedure.

Maximum Distance Between Sensor and Transmitter: 30.5 m (100 ft)

Temperature Compensation Inputs:

100 ohm platinum RTD1000 ohm platinum RTD100 kilohm thermistor

Ambient Temperature:-25 to +55C

Relative Humidity:0 to 95% noncondensing

Electromagnetic Compatibility (EMC):The Model 870ITEC Intelligent Transmitter complieswith the requirements of the European EMC Directive 89/336/EEC when the sensor cable and

I/O cables are enclosed in rigid metal conduit. (See Table 2.)

Power Supply Requirements (for 4 to 20 mA Output): 12.5 to 42 V dc (See Figure 2)

Document(a) Title

DP 611-163 Dimensional Print - 870IT Intelligent TransmittersMI 020-495 PC20 Intelligent Field Device ToolMI 020-501 PC50 Intelligent Field Device ToolMI 020-504 PC50 Intelligent Field Device Tool (FoxCom Communication)MI 611-206 FM and CSA Intrinsic Safety Connection Diagrams and

Nonincendive CircuitsMI 611-208(b) Electrochemical Products Safety Information (for European

installations)MI 611-220 Electrodeless Conductivity System Calibration ExamplesPL 611-153 Parts List - 870IT Style B Intelligent Transmitters(a)Documents are available on line atwww.ips.invensys.com(pull down Productsmenu and

select Measurement & Instruments, then Documentation, then Specs,Instructions, Drawings, Parts).

(b)Available in many languages on line atwww.ips.invensys.com(pull down Productsmenuand select Measurement & Instruments, then Downloads, then Safety Instructionsfor Analytical).


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Load Limitations (for 4 to 20 mA Output):0 to 1450 ohms (See Figure 2)

Figure 2. Supply Power vs. Load

Product Safety: The 870IT Transmitters have been designed to meet electrical safety descriptions

listed in Table 1. For detailed information, or status of testing laboratory approvals/certifications,contact IPS.

Table 1. Product Safety Specifications

Testing Laboratory, Types of Protection, and AreaClassification Application Conditions

ElectricalSafety Design

Code

ATEX intrinsically safe for II 1 G, EEx ia IIC hazardouslocations.

Temperature Class T4 - T6 AAA

ATEXType n energy limited for II 3 G EEx nL IIChazardous locations

Temperature Class T4 - T6 ANN

CSAintrinsically safe for Class I, II, and III, Groups A,B, C, D, E, F, and G, Division 1 hazardous locations.

Connect per MI 611-206.Temperature Class T4.

CAA

CSAsuitable for use in Class I, Groups A, B, C, D, F,and G, Division 2 hazardous locations.

Temperature Class T4. CNZ

FMintrinsically safe for Class I, II, and III, Groups A,B, C, D, E, F, and G, Division 1 hazardous locations.

Connect per MI 611-206.Temperature Class T4.

FAA

NOTEThe transmitter will function with an output load

less than 250 ohms provided that a PC-based

1400

1400

1300

1200

1100

1000

900

800

700

600

500

400

300

200

100

00

12.5 20 30 40 42

1450

TYPICAL SUPPLY VOLTAGEAND LOAD LIMITS

OPERATING

AREA

OPERATING

AREA

SEE NOTE

SUPPLY VOLTAGE, V dc

OUTPUTLOAD,

V dcLoad (ohms)

24 250 and 56530 250 and 86032 250 and 960

configurator is not connected to it. Connectinga PC-based configurator while operating in thisarea may cause disturbances and/or communi-cation problems.

250


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IdentificationA data label is fastened to the left side surface of the enclosure. This label provides the modelnumber and other information pertinent to your particular transmitter.

Figure 3. Data Label

Installation

Unpacking1. Remove the transmitter from the shipping container and check for visible damage.

2. Save the container until you determine that no shipping damage has occurred.a. If no damage is observed, proceed to the mounting procedure.

b. If the transmitter has been damaged, notify the carrier immediately and request aninspection report. Obtain a signed copy of the report from the carrier and call theIPS Global Client Support Center at 1-866-746-6477 or contact your local IPSrepresentative.

FMnonincendive for Class I, II, and III, Groups A, B,

C, D, F, and G, Division 2 hazardous locations.

Temperature Class T4. FNZ

Table 1. Product Safety Specifications

Testing Laboratory, Types of Protection, and AreaClassification Application Conditions

ElectricalSafety Design

Code

MODEL

CERT SPEC

REF NO.

ORIGIN

SUPPLY

POWER

FUSE

CALIB

CONFIG CD

ALARM

OUTPUT

CUST DATA

FOXBORO MA USA

MODEL AND STYLE

ELECTRICAL CLASSIFICATION CODESALES ORDER / SERIAL NUMBER (IF APPLICABLE)

PLANT OF MANUFACTURE, DATE, SERIAL NO.

SUPPLY VOLTAGE

MEASUREMENT RANGE

USER INFORMATION

POWER CONSUMPTION

COMMUNICATIONS

OUTPUT

870ITEC-FWFAA

FoxCom


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Mounting

Panel Mounting

Panel mounting of the transmitter is shown in Figure 4. For panel cutout size, spacerequirements, and other dimensional data, see DP 611-163.

Figure 4. Panel Mounting

Surface Mounting

Surface mounting of the transmitter is shown in Figure 5. Fasten the mounting bracket to thetransmitter using screws, washers, and lockwashers provided. Fasten the mounting plate to surfaceusing appropriate hardware. For space requirements and other dimensional data, see DP 611-163.

Figure 5. Surface Mounting

PANEL

TRANSMITTER

BRACKET

WASHER

NUT

TRANSMITTER

BRACKET

WASHER

LOCKWASHER

CAP SCREW

SURFACE


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Pipe Mounting

Pipe mounting of the transmitter is shown in Figure 6. Securely fasten mounting bracket to aDN50 or 2-in pipe as shown. For space requirements and other dimensional data, seeDP 611-163.

Figure 6. Pipe Mounting

WiringYour 870IT is a 2-wire transmitter. As such, it transmits output over the same two wires throughwhich it receives power. If your transmitter was specified with analog communications(870ITEC-A), you must supply its power source. If it was specified with digital communications(870ITEC-F), power can be provided via the I/A Series Fieldbus Module. Connect thispower/output signal and the signal from your measurement sensor as follows:

1. Open the hinged case door.

2. Remove the plastic shipping caps from the openings on the bottom of the case andreplace with proper fittings. You will be running wires through the left and rightopenings and capping the middle opening.

WARNING!

Wiring must comply with any existing local regulations.

WARNING!

A safety agency certified energy barrier must be used with this apparatus to meetagency certification requirements. See MI 611-206 (FM/CSA) or MI 611-208

(ATEX) for details.

CAUTION!

1. Failure to adequately seal open ports or secure the cover will jeopardize NEMA 4X,CSA Enclosure 4X, or IEC IP65 and will void instrument warranty.2. To maintain a rating of NEMA 4X, CSA Enclosure 4X, or IEC IP65, wiringmethods, conduit, and fittings appropriate to the ratings must be used. Table 2identifies recommended parts.

BRACKET

TRANSMITTER

WASHER

LOCKWASHER

NUT

LOCKWASHERU-BOLT

CAP SCREW

PIPE


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CAUTION!

To mimimize RFI/EMI effect, use grounded metal conduit on sensor cable and inputpower leads.

3. Bring the wires from your 2-wire input power in the left opening and connect to theinput power terminals shown in Figure 7. Bring the sensor cable in the right openingand connect to the appropriate terminals near the top of the case per Figure 7.

4. If you are notwiring a temperature measuring device, short terminals 6, 7, and 8 tominimize noise.

Table 2. Recommended Conduit and FittingsMaterial Conduit Fitting

Rigid Metal 1/2 inch Electrical Trade Size T&B* #370

Semi-Rigid Plastic T&B #LTC 050 T&B #LT 50P orT&B #5362

Semi-Rigid PlasticMetal Core

Anaconda Type HV, 1/2 inch T&B #LT 50P orT&B #5362

Flexible Plastic T&B #EFC 050 T&B #LT 50P orT&B #5362

*T&B = Thomas & Betts Corp., 1001 Frontier Road, Bridgewater, NJ 08807


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Figure 7. Wiring

Operation

Controls and Indicators

Operator controls and indicators are located on the front panel. Figure 8shows the panelarrangement. Table 3identifies the function of each element.

RTDMEASUREMENT(BRN)

RTDRETURN(BLU)

RTD3-WIRE(ORN)

INPUT POWER

CASE EARTH (GROUND)

PRIMARYSENSORDRIVE(BLK,WHT)

SENSORSCREEN(SHIELD)(C

LEAR)

SENSORRETURN(RED)

SENSORRETURN(CLEAR)

1 2 3 4 5 6 7 8

+

4-20mACAL

+

POWER

SUPPLY(24 V dc)

IFD MODEM

IBM COMPATIBLE

PC

OPTIONAL

PRINTER

RS-232

CABLE

TRANSMITTERCABLE

250

PC-BASEDCONFIGURATOR

NOTES:

1. IF NOT WIRING A TEMPERATURE MEASURINGDEVICE, SHORT TERMINALS 6, 7, AND 8.

NOTES:

2. TERMINAL 8 IS NOT USED WHEN YOUR SENSORCONTAINS A 2-WIRE TEMPERATURE ELEMENT.


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Figure 8. Indicators and Controls

Table 3. Indicators and Controls

Control/Indicator Function

Digital Bar Graph Displays percent-of-range indication.Primary Display Displays measurement and some error messages.Secondary Display Displays the absolute value of the measurement signal in S/cm or mS/cm,

the output in 4 to 20 mA, or the temperature, and error messages andconfiguration/calibration prompts.

CALibration Key Places transmitter in Calibration mode. This enables you to calibrate thetransmitter with resistors or solutions.

CONFIGuration Key Places transmitter in Configuration mode. This enables you to configurethe value or status of each parameter required for your application.

HOLD Key Places transmitter in Hold mode. This enables you to hold the output at adetermined value while configuring or calibrating the transmitter orperforming sensor maintenance.

MEASUREment Key Places transmitter in Measurement (normal operation) mode.STATUS Key Places transmitter in Status mode. This enables you to view the

measurement and system parameters and thus assess the performance of theloop.

DIAGnostics Key Places transmitter in Diagnostic mode. This enables you to further identifyspecific errors and possible solutions to an error flagged in Measurementmode.

Direction (Arrow) Keys Move you through the structure diagram and subsequent menus. They maybe used to increment one position at a time, or through a menu or string ofvalues by holding a key in the depressed position.

ENTER Key Enters the menu item or value selected.

WHEN CAL, CONFIG,STATUS, OR DIAG

ENTER KEY

20-SEGMENT BARGRAPHFOR OUTPUT % OF SPAN

WHEN IN MEASUREMODE.

UP, DOWN, LEFT,

CONFIGURATION KEY

HOLD KEY

DIAGNOSTIC KEY

CALIBRATION KEY

MEASURE KEY

STATUS KEY

UNDER THE APPLICABLE

KEY IS PRESSED, TWOSEGMENTS ONLY APPEAR

LEGEND.

AND RIGHT ARROW KEYS

20.00 MS

25.0 C

PRIMARY DISPLAY

SECONDARY DISPLAY


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Error MessagesThe 870IT Transmitter will display one of several messages when a problem occurs. These aresummarized below:

Flashing Display:Occurs when there are not enough significant digits on the display to display anumber. For example, if the PRIMARY SCALEwas configured as 99.99 and a measurement of

100 was received, the display would flash +99.99.CAL ERROR:Occurs when a limit condition was exceeded during an attempted calibration.CALappears on the top line and ERRORon the bottom line of the display.

XMTR ER:Occurs in Measure mode only to indicate a transmitter problem. The transmitter isstill configurable but measurements are held at the fail-safe value if set.

PROBE ER: Occurs in Measure mode only when one of the following probe errors is present:Leakage, ATC Short, and ATC Open. For more information, see Diagnostics on page 15.Message appears on the bottom line of the display and flashes alternately with the bottom linemeasurement. The transmitter is still configurable. For probe errors of ATC Short or ATC Open,measurements are held at the fail-safe value if set.

CONFIG ER:Occurs in Measure mode only when one of the following errors is present:Calibration Required, 4 - 20 Range, Measurement Range, and Compensation Range. For moreinformation, see Diagnostics on page 15. Message appears on the bottom line of the display andflashes alternately with the bottom line measurement.

ER DATA:Occurs after you change a value and try to enter it with the ENTERkey. The messageappears on the bottom line of the display. The top line does not change from the previous editprompt. Situations causing this message are:

1. New value is out of range.

2. The slope of a chemical composition curve has changed sign.

3. The first value of a compensation point pair (TEMPxxin TEMPCOMPor ABSxxinCHEMCOMP) was entered that was not greater than the last one.

Passcode AccessTwo levels of passcode protection are available. The Minor level permits access to Calibration andOutput Hold. The Major level permits changing parameters in Configuration as well asCalibration and Hold. Both are 4-digit passcodes. The passcodes may or may not be the same.They are set as part of configuring the instrument.

Upon entering the Configuration, Calibration, or Hold mode by pressing the appropriate key,the display will read PASSCODE 0000. Upon entering the proper passcode and then pressing

the ENTERkey, the display will change to the next item in the appropriate structure. The initialfactory default value for both Minor and Major passcodes is 0800.

Viewing and Changing DataIn the Configuration, Calibration, Hold, and Status modes, you will need to move through astructure of parameters (using the arrow keys and ENTERkey) to view and/or change the value orstatus of a particular parameter. Structure diagrams, located in Appendix A, will aid you in doingthis.


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Note that the Up and Down arrow keys will scroll through a menu in either direction. Also, thatthe arrow keys may be used to increment one position at a time, or to move continuously througha menu or string of values by holding the key in the depressed position.

The following example will show you how to use the keys in moving through the structure. Theexample used is that of configuring temperature features. For the example, assume Fahrenheittemperature units, an automatic temperature mode, a fail signal of 77F, and a 3-wire, 1000 ohm

RTD. In following the procedure, refer to Figure 9.

1. Use the Right arrow key to move from CONFIG TEMPto TEMP UNITSand then toUNITS CELSIUS.

2. Use the Down arrow key to move to UNITS FAHRENand press the ENTERkey.This will enter your Fahrenheit selection and return the display to TEMP MODE.Every temperature entry in the transmitter will now be in Fahrenheit units.

3. Use the Right arrow key to move to MODE AUTO. Press the ENTERkey. This willenter your Auto selection and move the display to FAIL SIG 000.0. The tenths digitwill be flashing.

4. Because you do not need to change the tenths digit, use the Left arrow key to move tothe units digit. Use the Up arrow key to change this digit to 7.

5. Use the Left arrow key to move to the tens digit and the Up arrow key to change thisdigit to 7. You have now achieved your goal of setting the value to 77.0, so press theENTERkey. This will enter your value of 77 and move the display to TEMP TYPE.

6. Use the Right arrow key to move to TYPE RTDand press the ENTERkey. This willenter your selection of RTD and move the display to RTD 2 WIRE.

7. Use the Down arrow key to move to RTD 3 WIREand press the ENTERkey. Thiswill enter your selection of 3 Wire and move the display to 3 WIRE 100 OHM.

8. Use the Down arrow key to move to 1000 OHMand press the ENTERkey. This will

enter your selection of 1000 ohm and move the display back to CONFIG TEMP. Thiscompletes the example.


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Figure 9. Example of Structure Diagram

MeasureMeasure is the normal operating mode of your transmitter. The conductivity measurement isshown on the top line of the display. It is in the units specified during configuration. If themeasurement is too small to be displayed at the configured resolution, the display will readCONFIG ER. The second line of your display continually displays the absolute conductivity valuein S/cm or mS/cm, the analog output in 4 to 20 mA, or the temperature, depending on yourconfiguration. You can view one of the other two selections by using the Up and Down arrowkeys. The display will return to the configured selection when the TIMEOUTtime is reached.Because the 870ITEC Transmitter can be preconfigured for up to three distinct applications, youcan move from one application to another by calling up a specific application in Configurationmode and then monitoring and controlling it in the Measurement mode. Transmitter (XMTRER) and sensor (PROBE ER) errors are also shown on your display while in the Measurementmode.

CONFIGTEMP

TEMPUNITS

UNITSCELSIUS

UNITSFAHREN

TEMPMODE

MODEAUTO

MODEMANUAL

FAIL SIG

MANUAL

TEMPTYPE

TYPERTD

TYPE

100 kOHM

RTD2 WIRE

RTD3 WIRE

2 WIRE100 OHM

2 WIRE1000 OHM

3 WIRE100 OHM

3 WIRE1000 OHM


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Diagnostics(Refer to Structure Diagram 14 on page 55.)

The Diagnostics mode enables you to perform checks on your system at any point in time. Whileyou are in the Diagnostic mode, two segments of the bar graph will appear under the legendDIAG at the top of the front panel. To enter the Diagnostics mode, press the DIAGkey on the

front panel. If there are no errors, your display will read DIAGS OK. If there was an error flaggedas XMTR ER, PROBE ER, or CONFIG ERin the Measurement mode, the Diagnostics modewill help you further identify the specific error and corrective action. Possible errors and therecommended corrective actions are listed in Table 4.

NOTEIf an error occurs, even with OUTPUT FAILSAFEconfigured OFF, the display stillflags the error in Measurement mode if the diagnostic is configured ENABLE.

Status(Refer to Structure Diagram 11 on page 52.)

The Status mode enables you to view the measurement and system parameters and thus assess theperformance of the loop. You may not edit them in this mode. All measurements (outputs)continue while in the Status mode. To enter the Status mode, press the STATUSkey. Movethrough the menu by using the Up and Down arrow keys. While you are in the Status mode, twosegments of the bar graph will appear under the legend STATUSat the top of your front panel.The Status menu contains the following parameters:

Table 4. Diagnostic Errors

Message Description Corrective Action

Transmitter Error

Probe Errors

LEAKAGE Checks solution leakage into the probe. Replace probe

ATCSHORTATC OPEN

Flags an error if the resistance of thetemperature compensator is greater or less thanthe expected resistance of the device configured.

Replace temperaturecompensator

Configuration Errors

CAL REQ Calibration required Calibrate specified application

4 - 20 RNG Measurement over or under configured range Reconfigure range or correctprocess error

MEAS RNG Measurement over or under configuredprecision or scale

Reconfigure precision orcorrect process error

COMP RNG Measurement over or under compensationrange

Reconfigure compensation orcorrect process error


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Only eight characters will be shown on your display at a time but you may scroll using the Leftand Right arrow keys.

ConfigurationConfiguration is the process of establishing functional capability in the transmitter firmware foryour application. This section will help you to systematically determine and configure the value orstatus of each parameter required for your application. Many applications require only changing afew of the default values already entered. While you are in the Configuration mode, two segmentsof the bar graph will appear under the legend CONFIGat the top of your front panel. Thesesegments will flash if you are also in a Hold mode. To enter the Configuration mode, press theCONFIGkey. At the prompt, enter the 4-character Major passcode and press ENTER. If thepasscode is correct, the display will flash UNLOCKEDand then change to the first item in theconfiguration structure. You may then edit any of the parameters in the Configuration mode. Ifthe passcode is incorrect, the display will flash LOCKEDand then change to the first item in theconfiguration structure. You may view the parameters in this mode but will not have the ability tochange them. In the UNLOCKEDcondition, the analog output defaults to 3.8 mA. If you do notwant this to happen, turn the Hold feature on first.

CAUTION!

Always exit the Configuration mode by pressing the MEASUREkey before power isturned off. This allows proper reinitialization of internal data base security checks.

Table 5. Status Parameters

Parameter Description

APP NUM Application number currently running

TEMP Process Temperature

ABSOLUTE Uncompensated S/cm or mS/cm signal from sensormA Analog Output: Analog output value in mA

Digital Output: Output shown on secondary display in mA.

ATC RES Resistance of temperature compensator

CAL NAME Name of last calibrator

LAST CAL Date of last calibration (mm/dd/yy)

TAG NAME Tag name*

LOCATION Location of measurement*

SONUMBER Sales order number

MS CODE Model code

S/W VER Software version

DEV NAME Device name*

DEV TYPE Device type*

TAG NUM Tag Number*Appears only on devices model coded 870ITEC-F


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Config Appls

(Refer to Structure Diagram 1 on page 42.)

NOTEThis parameter appears only when the number of applications set in Config NumApps on page 31is more than 1.

The 870ITEC Transmitter can be preconfigured for up to three distinct applications. Eachapplication can have its own display, temperature compensation curve, chemical concentrationcurve (if applicable), and output configuration. Each application is assigned an identificationnumber (such as 1, 2, or 3). You must first specify the number of applications you wish toconfigure in Config Num Apps on page 31). If Config Num Apps is set at 1, then the ConfigAppls parameter is bypassed in the menu structure.

If you wish to change from one application to another, you can specify the application number inCONFIG APPLS, and the entire application set switches to that preconfigured application. Youcan also specify AUTOinstead of 1, 2, or 3, and the transmitter will switch from one applicationto another when triggered by measurements above or below established limits.

Config Sensor


This section of the structure asks you to specify the sensor being used. If the sensor being used isnot one of the Foxboro sensors listed, specify OTHERand its electrical cell factor (CELLFACT).The firmware allows a cell factor entry between 00.00 and 99.99. For Foxboro Flow-Throughsensors, such as the 871FT series, specify OTHERand enter the electrical cell factor, not thegeometric cell factor. Refer to MI 611-202 on 871FT sensors.

NOTE

A change of sensor requires a calibration.

Configx Display

NOTEIn the next several sections, when the first line prompt in the structure diagrams issuffixed by the letter x, the x is replaced by the application number that iscurrently being edited. The application number is omitted whenCONFIG NUM APPSis configured as 1.


This section enables configuration of the primary (top) and secondary (bottom) digital displaysfor local viewing.

Under DISPLAY PRIMARYyou can specify the PRIMARY UNITSas S/cm, mS/cm, %, orCUSTOM. If CUSTOM, you can specify the units as %(percent), g/l(grams/litre), ppm(partsper million), oz/gal(ounces per gallon), ppt(parts per thousand), S/m(Siemens per meter), orNONE.

If you selected S/cmor mS/cmas PRIMARY UNITS, you will be asked to specify thePRIMARY SCALE. The scale may be selected as indicated in Table 6or Table 7.


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NOTEIn Measurement mode, because of space availability, the units S/cm and mS/cmare displayed locally as S and mS respectively.

If you selected %(but not CUSTOM %) as PRIMARY UNITS, you will be asked to specify thescale according to the chemical being measured. See Table 8. The most recently programmedchemical will appear on the display. Use the arrow keys to display the desired chemical and pressENTER. If more than one reference temperature exists for the chemical, the display will show one

of the choices, which can be changed to another choice with the arrow and ENTERkeys. If nochoice exists, the reference temperature is 25C (77F). When you have completed thisconfiguration, the chemical or reference temperature will appear on the top display and theallowable measurement range in percent by weight on the lower display.

NOTESetting these parameters sets the units, decimal placement, and temperaturecompensation. Additionally, internal changes are made within the analyzer whichmake calibration necessary.

Table 6. Primary Scale in S/cm

Scale Limitations

50.00 Sensor LB, UT, OTHER only

100.0 Sensor LB, UT, OTHER only

200.0 Sensor AB, BW, EV, LB, RE, UT, OTHER only

500.0 Sensor AB, BW, EV, LB, RE, UT, OTHER only

1000 No limitations

5000 No limitations

Table 7. Primary Scale in mS/cm

Scale Limitations

1.000 No limitations








500.0 Sensor LB, UT only are excluded

1000 Sensor LB, UT only are excluded

2000 Sensor AB, BW, EV, LB, RE, UT only are excluded


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Table 8. Primary Scale in Percent

Chemical Scale

mS/cm at Various Percent Concentrations

1% 5% 10% 15% 18% 20% 25% 35% 42% 93% 96% 99.50% 99.90% 99.99%

Sodium Chloride (NaCl) 0 - 25% 20 80 140 188 212 225 248

Phosphoric Acid (H3PO4) 0 - 35% 10 32 64 92 112 123 153 208Hydrochloric Acid (HCl) 0 - 15% 112 430 700 820

Sulfuric Acid (H2SO4)50C Ref30C Ref25C Ref

99.5 - 93%99.5 - 93%0 - 25% 50 221 440 595 670 721 790

230158

205130

6320

46 42

OLEUM65C Ref65C Ref

42- 18%0 - 10% 39 67 79

76 74 64 34 15

Nitric Acid (HNO3) 0 - 10% 63 281 500

Sodium Hydroxide(NaOH)

25C Ref50C Ref100C Ref

0 - 15%0 - 15%0 - 20%

6076100

220320495

355530850

4106501110 1230 1310

Potassium Hydroxide(KOH)

0 - 6% 38.5 178 356 495 525

Potassium Chloride (KCl) 0.5 - 16% 15.7 71.9 143 208

Acetic Acid (CH3OOH) 0 - 8% 0.64 1.43 1.70 1.82

Hydrofluoric Acid (HF)0C Ref25C Ref

99 - 90%0 - 30% 11.7 59 120.5 189.5 236 260 325

224 39.9 12.6 2.089


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For each of these scale ranges, the value to the right of the - is editable (to tenths resolution) inorder to close the span to no less than 10% of the full scale shown. The span cannot be increasedbeyond what is shown. Once a span has been selected, the greatest absolute conductivity for that spanwill be validated against the selected cell type.

See Figure 10for some sample mS/cm vs. percent concentration curves. Note that the curves are notlinear.

Figure 10. Sample Concentration Curves

PERCENT CONCENTRATION



SULFURIC ACID

SODIUM HYDROXIDE

SODIUM HYDROXIDE

65.3

mS/cm

234

SULFURIC ACID

AT 50 C

99.592.5

420

AT 25 C0

0 15%

mS/cm

1300

00 20

AT 100 C

mS/cm


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Next, under DISPLAY SECOND, you can configure the secondary display to show the absolutevalue of the measurement in S/cm or mS/cm, the output in 4 to 20 mA, or the temperature.

Configx Tempcomp


This section of the structure asks you to specify the temperature compensation.

NOTEThis parameter does not appear if your PRIMARY UNITSwere configured aspercent (%) in Configx Display on page 17since the transmitter applies theappropriate compensation automatically.

Primary Units Configured S/cm or mS/cm

If your PRIMARY UNITSwere configured as S/cmor mS/cm, you are first asked to specifyABSOLUTE, LINEAR, CUSTOM, or one of several preprogrammed chemical-specific

temperature compensations. ABSOLUTEmeans that there is no temperature compensationapplied. If your application is such that one chemical composition dominates, select one of thepreprogrammed compensations listed in Table 9. The most recently configured entry will appearon the display. Use the arrow keys to display the desired entry and press ENTER. If you selected achemical and more than one reference temperature exists for the chemical, the display will showone of the choices. This choice can be ENTERed or another choice selected with the arrow andENTERkeys.

Table 9. Chemical Specific Temperature Compensations

Tempcomp Menu Valid Temperature Range

Sodium Chloride (NaCl)Dilute (25C Ref)0 - 25% (25C Ref)

0 to 200C (32 to 392F)0 to 200C (32 to 392F)

Green Liquor(GRN LIQ) (Na2CO3)(85CRef)

35 to 96C (94 to 204F)

Black Liquor (BLK LIQ) (Na2O)(160C Ref)

46 to 210C (115 to 411F)

Phosphoric Acid (H3PO4)(25CRef) 4.4 to 93C (40 to 200F)

Hydrochloric Acid (HCl) (25C Ref) -10 to +122C (14 to 252F)

Sulfuric Acid (H2SO4)50C Ref (99.5 - 93%)30C Ref (99.5 - 93%)25C Ref (0 - 25%)

-10 to +120C (14 to 249F)10 to 90C (50 to 194F)-10 to 120C (14 to 249F)

OLEUM0 - 10% (65C Ref)42 - 18% (65C Ref)

32 to 120C (89 to 249F)32 to 120C (89 to 249F)

Nitric Acid (HNO3)(25CRef ) -10 to +120C (14 to 249F)


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If you selected LINEAR, specify the slope of the linear compensation curve between 0.5 and5.0%/C. The default value is 2.2. The reference temperature is 25C.

If you selected CUSTOM, the prompts will ask you to specify a reference temperature and anumber of points to plot a compensation curve. The process specific compensation data must begenerated or extracted in advance of entering it into the transmitter. We suggest that the data beplotted graphically as well as tabularly to prepare it for entry into your transmitter. See Figure 11.

In entering the data, the number of points (NUM PTS) can be specified from 2 to 21 points(default value is 2). Each point specifies a conductivity value at a certain temperature. TheTEMPxxtemperature units (Celsius or Fahrenheit) are specified under Config Temp onpage 27. The values (VALxx) can be specified from 0 to 2000 mS and have a default of 0.

NOTEWhen entering data, remember to check the sign at the left of your display.

The data should be input to the transmitter with increasing values of temperature.

NOTEIf temperature compensation curve data is entered such that a temperature value isnot greater than the previous one, then the message ER DATA flashes on thebottom line of your display. Editing continues by reverting back to the first pointpair entry, with all previously entered values saved. Actual database saving of thecompensation table is not performed until the last point pair is entered.

A maximum or minimum temperature difference between successive temperatures is notrequired. The intervals do not need to be evenly spaced. We suggest 2 or 3 points be used in linear

regions and more data points be used in curved regions. See Figure 12.

Sodium Hydroxide (NaOH)25C Ref (0 - 15%)50C Ref (0 - 15%)

100C Ref (0 - 20%)

-0.6 to +121C (31 to 250F)0 to 100C (32 to 212F)

-11 to +122C (12 to 252F)Potassium Hydroxide (KOH) (20C Ref) 10 to 40C (50 to 104F)

Potassium Chloride (KCl) (20C Ref) 0 to 25C (32 to 77F)

Acetic Acid (CH3COOH) (25C Ref ) 5 to 120 C (40 to 250F)

Hydrofluoric Acid (HF)0C Ref (90 - 99%)25C Ref (0 - 30%)

-20 to +208C (-4 to +406F)35 to 95C (94 to 204F)

Table 9. Chemical Specific Temperature Compensations (Continued)

Tempcomp Menu Valid Temperature Range


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Figure 11. Reference Conductivity vs. Temperature Data

Figure 12. Configured Conductivity vs. Temperature Data

TEMPERATURE ( C)

mS/cm

TEMPERATURE

mS/cm


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In the example used in Figure 11and Figure 12, the 35 reference points were reduced to 15configured points. The configuration procedure was as follows:

1. Specify the reference temperature. For this example, 25C.

2. Specify the number of points on your curve. For this example, 15.

3. Specify the 15 point pairs.

Primary Units Configured CUSTOM

If your PRIMARY UNITSwere configured as CUSTOMin Configx Display on page 17, theprompts will ask you to specify a reference temperature and a number of points to plot acompensation curve as you were in the procedure immediately above. The number of points(NUM PTS) can be specified from 2 to 21 points and has a default value of 2. Each point specifiesa value at a certain temperature. The temperature units are specified under Config Temp onpage 27. However, the choice of conductivity units (S/cm or mS/cm) was not made previouslyso it is made here. The values of these units (VALxx) can be specified from 0 to 2000S/cm ormS/cm and have a default of 0.

Configx Chemcomp


This section of the structure asks you to specify the chemical compensation, the relationshipbetween Absolute units in S/cm or mS/cm and Custom units in units of your choice.

NOTEThis parameter will not appear unless your PRIMARY UNITSwere configured asCUSTOM(%, g/l, ppm, oz/gal, ppt, S/m, or NONE) in Configx Display onpage 17.

The process specific compensation data must be generated or extracted in advance of entering itinto the transmitter. We suggest that the data be plotted graphically as well as tabularly to prepareit for entry into your transmitter. See Figure 13.

The prompts first ask you to specify a number of points (NUM PTS) to plot the compensationcurve. The number of points can be specified from 2 to 21 and has a default of 2. Next, you willbe asked to specify the absolute UNITSin S/cm or mS/cm, the absolute scale (ABSSCALE) as.9999, 9.999, 99.99, 999.9, or 9999., and the custom scale (CUSSCALE) as .9999, 9.999,99.99, 999.9, or 9999. The absolute scale is in S/cm or mS/cm as just specified and the customscale is in the units previously configured in CONFIG X DISPLAY. Lastly, for each of thenumber of points specified above, specify an absolute value (ABSxx) and the value you want it to

be (NEWxx). The values can be specified from 0 to 2000 custom units and have a default of 0.A maximum or minimum difference between successive concentrations is not required. Theintervals do not need to be evenly spaced. We suggest 2 or 3 points be used in linear regions andmore data points be used in curved regions. See Figure 14.


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Figure 13. Reference Conductivity vs. Concentration Data

Figure 14. Configured Conductivity vs. Concentration Data


mS/cm


mS/cm


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In the example used in Figure 13and Figure 14, the 33 reference points were reduced to 16configured points. The configuration procedure would have been as follows:

1. Specify your PRIMARY UNITSas CUSTOMand %in Configx Display onpage 17.

2. Go to CONFIG CHEMCOMPand specify the number of points on your curve. For

this example, 16.3. Specify the absolute units. For this example, mS/cm.

4. Specify the scale of your absolute values. For this example, because they are from 0 to258.9, specify ABSSCALEas 999.9.

5. Specify the scale of your custom units. For this example, because they are from 0 to64 percent concentration and the degree of accuracy is only required in whole units ofpercent, specify CUSSCALEas 9999.

6. Specify the 16 point pairs.

NOTEWhen entering data, remember to check the sign at the left of your display.

NOTEIf chemical compensation curve data is entered such that the slope would changesign, then the message ER DATAappears on the bottom line of your display. Pressany key to clear the message and continue editing. Editing continues by revertingback to the first point pair entry, with all previously entered values saved. Actualdatabase saving of the compensation table is not performed until the last point pairis entered.

Configx Output


This section of the structure first asks you to specify the MODE, referring to the communicationsand measurement output. If your transmitter was specified with analog output only(870ITEC-A), specify ANALOG. If your transmitter was specified with I/A Seriescommunications (870ITEC-F), specify ANALOGif you want to have a 600 baud digital signalsuperimposed over an analog 4 to 20 mA signal, or specify DIGITALif you want to have a 4800baud digital signal only.

If you configured the mode as ANALOG, you will be asked, under OUTPUT ANALOG, tospecify the 4 to 20 mA output to represent the uncompensated (ABSOLUTE) measurement, the

temperature compensatedMEASURE

ment, or theTEMP

erature.If you configured the mode as DIGITAL, the 4 to 20 mA output will be fixed at 12 mA.

Next, under OUTPUT RANGE, enter the MINimum (4 mA) and MAXimum (20 mA) rangevalues for the output just specified. Specify in S/cm or mS/cm for ABSOLUTE, in C or F forTEMPerature, or in measurement units (e.g., S/cm, mS/cm, %) for MEASURE. To configurethe output as reverse acting, enter higher value as MINimum and the smaller as MAXimum.


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NOTE1. The units for temperature C or F are specified in the section titled ConfigTemp on page 27.2. A change in OUTPUT ANALOGcauses the OUTPUT RANGEto default to 0.0and thus new MINand MAXvalues must be entered.

Lastly, you can specify a fail-safe signal for sensor diagnostic errors of ATC SHORTandATC OPEN. Specify OFFunder OUTPUT FAILSAFEto omit this feature. Specify ONto specifya fixed output when in a failed condition. If ONis selected, further specify the DC mA outputbetween 3.8 and 20.5 mA. The default value is 3.8 mA. If you want to have this signal outputtedwith 0.5 mA pulse (as shown below) for greater visibility on a chart recorder or data display,specify ONas explained above and then go back and specify PULSE.

NOTE

If an error occurs, even with OUTPUT FAILSAFEconfigured OFF, the display stillflags the error in Measurement mode if the diagnostic is configured ENABLE.

Config Temp


This section of the structure asks you to specify the temperature features that will be used for allthree applications. First, specify the TEMP UNITSas CELSIUSor FAHRENheit. All referencesto temperature will appear in the specified units within the transmitter software.

Next, specify the TEMP MODEas AUTOor MANUAL. In the Auto mode, the temperature

follows the RTD. In Manual mode it is set at a fixed value. At this point you can set aFAIL SIGnal (default) value for the Auto mode (in case the RTD fails) at the temperature atwhich you expect the process to be operating; or you can set a temperature for the Manual mode.

Last, specify the TEMP TYPEas RTDor 100 kOHMthermistor. If you specify the TYPEas RTD,specify 2-WIREor 3-WIREand specify the resistance as 100 OHMor 1000 OHM. See Table 10for standard Foxboro sensors.

Table 10. Foxboro Sensor Data

Sensor RTD or Thermistor

AB 100 kThermistorBW 2 wire, 100 RTD

EV 100 k Thermistor

HP 2 wire, 100 RTD

PP 2 wire, 100 RTD

LB 100 k Thermistor

NL 100 k Thermistor

PN 100 k Thermistor


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Config Damping


This section of the structure asks you to specify the damping response time (90% of step).Choices are 1, 5, 10, 20, 40, and 120 seconds. Damping applies only to measurement data, not totemperature data.

Config Instrmnt


NOTEThis section is not displayed unless the correct passcode had been entered forConfiguration.

INSTRMNT mA CAL

This subsection allows you to tune the 4 mA and 20 mA values. The procedure is as follows:

1. Connect a digital voltmeter to the calibration terminals (see Figure 7 on page 10).2. With INSTRMNT mA CALdisplayed, press ENTER. The display will change to

mA CAL 4 mA. Press ENTERagain.

3. Calibration is performed by having your voltmeter read 100 mV. Do this by selectingone of the seven icons from the second line of your display by using the Left andRight arrow keys. When you have highlighted the icon you want, press ENTER. Theicon meanings (shown below) are (from left to right) large increase, medium increase,small increase, accept and exit, small decrease, medium decrease, large decrease.

4. Repeat Step 3 until your meter reads 100 mV. Then highlight the center icon andpress ENTER. The display will go to mA CAL 20 mA. Press ENTER.

5. Repeat the procedure shown in Steps 3 and 4 for 20 mA. The voltage reading shouldbe 500 mV.

PX 100 k Thermistor

RE 100 k Thermistor

SP 100 k Thermistor

PT 100 k ThermistorTF 100 k Thermistor

UT 2 wire, 100 RTD

Table 10. Foxboro Sensor Data (Continued)

Sensor RTD or Thermistor


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INSTRMNT STAB IND

When performing a calibration (see Calibration on page 33), the transmitter checks for stabilityin absolute measurement and temperature before accepting a change. This section enables you toconfigure the TIMEallowed to attain stability and the amount of fluctuation (VAR) allowedduring the calibration. The value of VARcorresponds to the least significant digit of themeasurement in the PRIMARY SCALEyou configured in Configx Display on page 17. Both

TIMEand VARare configured individually in STAB IND MEASurement andSTAB IND TEMPerature.

First, configure STAB IND MEASas ONor OFF. If you configure this as ON, you need tospecify the TIMEbetween 5 and 60 seconds (in 5-second increments) and the VARiable between1 and 9. The default TIMEis 5 seconds and the default VARiable is 9. A longer time period and asmaller measurement value assures more stability during calibration.

NOTEIn specifying the VARiable, the numbers 1 through 9 refer to the last digit of theprimary scale; e.g.,

If scale is 20.00 mS, a VARvalue of 5 means 0.05 mS.

If scale is 1000 mS, a VARvalue of 5 means 5 mS.Thus, if the scale is 20.00 mS, and the default time and variable are used, the valuescan change at a rate of 0.09 mS over 5 seconds.

Then repeat the procedure for STAB IND TEMP. If you configure this as ON, you need to specifythe TIMEbetween 5 and 60 seconds (in 5-second increments) and the VARiable between 1 and 9(C or F). The default TIMEis 5 seconds and the default VARiable is 9, thus allowing atemperature change of 0.9C or F over a 5-second period.

Config Timeout

(Refer to Structure Diagram 7 on page 48.)This section of the structure asks you to specify the time in which the instrument will bring youback to the on-line/Measurement mode from another on-line mode (Status, Diagnostics, or theview only part of Configuration) when no keyboard input has occurred. In Measure mode,TIMEOUTalso limits the time to view a secondary display other than that configured inCONFIG DISPLAY. The time may be specified between 0 and 999 seconds. A value of zero (0)disables the time-out function. The default time is 600 (10 minutes).

Config Passcode


NOTEThis parameter is not displayed if the transmitter is locked (i.e., the correctpasscode was not entered for Configuration).

This section of the structure asks you to specify the Minor and Major Passcode. The Minorpasscode limits access to routine maintenance functions including CALIBRATIONand outputHOLD. The Major passcode prohibits unauthorized personnel from changing the configurationparameters. Each is a 4-character string between 0000 and 9999. They may or may not be the


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same. The default passcodes are both 0800. To disable the passcode feature, configure a passcodeas 0000.

Config Diags


This section of the structure allows configuring error messages that can appear on your display.You can elect to ENABLEall messages, DISABLEallmessages or enable or disable each of thefollowing individually: LEAKAGE, ATCSHORT, ATC OPEN, 4 - 20 RNG, COMP RNG, andMEAS RNG. Each of these is discussed below. A typical approach is to initially select ENABLEALLDIAGSand to DISABLEselect messages later when you find out that you do not requirethem. Further, when you have messages on your display, you may CLEARall of the messages orCLEARspecific messages. This feature then disables the reporting of those messages for an hourto allow time for corrective maintenance.

LEAKAGE

This message reports a problem of liquid leakage into the sensor. The message may be enabled,disabled, or cleared.

ATCSHORT, ATC OPEN

This message reports a problem if the resistance of the temperature compensator is greater or lessthan the expected resistance of the device configured. The message for each may be enabled,disabled, or cleared.

4 - 20 RNG

This message reports that the measurement tied to the analog output is outside the rangeconfigured for the currently running application. The message may be enabled, disabled, orcleared.

MEAS RNG

This message reports that the measurement cannot be displayed accurately in the precision/scalethat is configured for the currently running application. The message may be enabled, disabled, orcleared.

COMP RNG

This message reports that the measured temperature or absolute measurement is outside thetemperature or chemical compensation curve configured for the currently running application.The message may be enabled, disabled, or cleared.

Config Strings


This section of the structure asks you to specify the designation of the Tag Number ( TAG NUM),Tag Name (TAG NAME), Location (LOCATE), and Device Name (DEV NAME). Each can be


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made up of characters from Table 11and can be of up to the following number of characters inlength:

Only eight characters will be shown on your display at a time but the display will scroll as youenter additional characters.

NOTEOnly TAG NUMappears if your transmitter was specified with analog output only(870ITEC-A).

Config Num Apps


This section of the structure asks you to specify the number of applications (NUM APPS) you

wish to preconfigure. It can be 1, 2, or 3. For more information on this subject, see ConfigAppls on page 17.

Config Trigger


If AUTOwas configured under Config Appls on page 17, allowing you to switch from oneapplication to another automatically, this section of the structure enables you to specify theparameters under which the switching will occur. Specify the values of these triggers (APP1 HI,APP2 LO, APP2 HI, and APP3 LO). These values must be entered in actual values and not inpercent. It is assumed that although the ranges of the applications may overlap, application 1 hasthe lowest conductivity value, application 2 is next, and application 3 has the highest. SeeTable 12for an example of the Trigger function. The switching from one application to anotheronly takes a few seconds. However, once a switch is made, another switch will not be allowed forone minute.

TAG NUM 12TAG NAME 14LOCATE 14DEV NAME 6

Table 11. List of Characters

Characters

0 through 9. (period) (dash)(blank)A through Z_ (underscore)


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In the above example, if the value of Application 1 exceeds 75 S/cm, the transmitter switches toApplication 2; if the value of Application 2 exceeds 0.9 mS/cm, the transmitter switches toApplication 3; if the value of Application 2 drops below 0.05 mS/cm it switches to Application 1;if the value of Application 3 drops below 1 oz/gal (0.6 mS/cm), the transmitter switches toApplication 2. As the transmitter switches from one application to another, the message SW TOAPP X appears on the display.

Hold(Refer to Structure Diagram 10 on page 51.)

The Hold mode enables you to hold the output at a determined value, thus allowing you toconfigure or calibrate the transmitter or perform sensor maintenance without disturbing thecontrol loop. If you do notput the transmitter in Hold mode before configuring or calibrating,the output will go to 4 mA if you have configured the output as ANALOGor be held at thepresent value if you have configured the output as DIGITAL.

While you are in the Hold mode, the bar graph will flash on and off. To enter the Hold mode,press the HOLDkey. You will be prompted to enter the Minor passcode. If you enter theincorrect passcode, the transmitter will revert to the Measurement (normal) mode. If you enterthe correct passcode, the display will read HOLD OFFor HOLD ON. If it reads HOLD OFF, usethe Down arrow key to change it to HOLD ON. Then specify whether you want to hold theoutput at the PRESENTvalue or at another value that you will MANUALly set.

If you selected MANUALand your transmitter was specified with analog communications(870ITEC-A), your display will read MANUAL ANALOG. Specify the value between 4.00 and20.00 mA at which you want to hold the output while in the Hold mode. The default value is4.00.

If you selected MANUALand your transmitter was specified with digital communications(870ITEC-F), and you had previously selected ANALOGunder CONFIG OUTPUT, your displaywill read MANUAL ANALOG.

Table 12. Example of Trigger Function

Application 1RinseWater

Application 2Product

Application 3 CausticCleaner

Example of Process

Display 0 to 100 S/cm 0 to 1 mS/cm 0 to 5 oz/gal(0 to 2 mS/cm)

Chemcomp Not Applicable Not Applicable 0 to 5 oz/gal(0 to 2 mS/cm)

Tempcomp NaCl dilute KCl Custom Program

Output 20 to 80 S/cm 0 to 1 mS/cm 0 to 5 oz/gal

Example of Trigger Function

Trigger Hi 75 S/cm 0.9 mS/cm - - -

Low - - - 0.05 mS/cm 1 oz/gal (0.6 mS/cm)


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1. Specify the value between 4.00 and 20.00 mA at which you want to hold the outputwhile in the Hold mode. The default value is 4.00.

2. Next, go to MANUAL DIGITALand specify the MEASUREment units,TEMPerature, and ABSOLUTEvalue you want to hold the output at while in theHold mode.

a. TheTEMP

erature can be specified between -99.9 and +999.9 (C or F). Thedefault value is 0.0.

b. The ABSOLUTEvalue can be specified between 0.0 and 2000.0 mS. The defaultvalue is 0.0.

If you selected MANUALand your transmitter was specified with digital communications(870ITEC-F), and you had previously selected DIGITALunder CONFIG OUTPUT, your displaywill prompt you to specify the MEASUREment units, TEMPerature, and ABSOLUTEvalue youwant to hold the output at while in the Hold mode.

1. The TEMPerature can be specified between -99.9 and +999.9 (C or F). The defaultvalue is 0.0.

2. The ABSOLUTEvalue can be specified between 0.0 and 2000.0 mS. The defaultvalue is 0.0.

Calibration(Refer to Structure Diagram 12 on page 53.)

Calibration routines in your transmitter were designed for simplicity and the elimination oferrors. The procedures are self-prompting. Two routines are available. A bench calibration isaccomplished by performing a zero calibration with the sensor suspended in air and calibration ofa second point done with the use of a loop resistor, a decade resistance box, a Foxboro calibrationplug, or (when used with an 871FT Flow-Through Sensor) a Foxboro calibration cable. A

solution calibration enables you to enter or edit value(s) of your solution. A single point offset (tobias the measurement by a constant value), single point span (to correct for cell factor change dueto installation), or 2-point solution calibration may be performed. However, a single pointcalibration may only be used if you have previously done a 2-point calibration. A benchcalibration is strongly recommended because it is not subject to potential variables such asimpurities in a solution or temperature variations. Note that damping does not affect either benchor solution calibration (signal is automatically filtered internally).

NOTE1. Before doing any calibration, check that the temperature on the secondary

display in the Measure mode agrees with the actual temperature of the process. If

there is a difference, the actual temperature should be entered under CALxTEMPin the Calibration mode before beginning your calibration. Thetemperature may be between -99.9 and +999.9 (C or F). Even though thetemperature appears on each CALx TEMPmenu, it is not an applicationdependent variable and is a constant program among the three applications.

2. For system calibration examples, see MI 611-220.

While you are in the Calibration mode, two segments of the bar graph will appear under thelegend CALat the top of your front panel. These segments will flash if you are also in a Hold


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mode. To enter the Calibration mode, press the CALkey. You will be prompted to enter theMinor passcode. If you enter the incorrect passcode, the transmitter will revert to theMeasurement (normal) mode. If you enter the correct passcode, the display will readCALx SOLUTION.

Solution Calibration

If you are using a solution calibration, specify SINGLEPTor TWO PTcalibration and ifSINGLEPT, specify OFFSETor SPAN. OFFSETis used if correcting for a shift in system zero(such as might be present if a sensor becomes magnetized). SPANis used to correct for a shift insystem span (such as might be present if a sensor is too close to a pipe or vessel wall).

Upon the prompt IMMERSE IN SOLUTION 1, immerse your sensor into its solution and pressENTER. If stability parameters were configured ON, the display READING XXXXXXXXwillflash until stability is achieved and then alternate with the message ENTER TO EDIT. Wait forthis message and then press ENTERagain. If stability parameters were configured OFF, watch forthe measurement to stabilize before proceeding to press ENTER. If the reading is not correct, editit to the correct value under OFFSET, SPAN, or VALUE n. Press ENTER. Wait for a display of

CAL COMPLETE(for SINGLEPT) or IMMERSE IN SOL 2(for TWO PT). If you are doing a 2-point calibration, place the sensor in the second solution and repeat the procedure. If calibrationwas not successfully completed, the display will read CAL ERRORand return you to thebeginning of the procedure.

Bench Calibration

If you are using bench calibration:

1. Move to SUSPEND IN AIRand suspend the dry sensor in air.

NOTE

For a nonzero based range (for example, high percent range H2SO4), connect a loopresistance through the sensor. The resistance is calculated in a similar manner tothat of the full scale resistance explained in Step 3.

2. Move to ZERO and enter the zero value. The ZEROdata will flash while stability isachieved (see note below). Press ENTER. The display will indicateCONNECT LOOP RES. If a calibration error occurs, the display reads CAL ERRORand returns you to the beginning of the procedure.

NOTEFlashing continues until measurement is stable as determined by configuredstability parameters. If stability parameters are disabled, watch for the measurement

to stabilize before proceeding.

3. Calculate the full scale value input resistance required. The geometric cell factor isrequired for this calculation. Geometric cell factors for various Foxboro invasivesensors are listed in Table 13.

The resistance required to calibrate your system at full scale value is dependent upon:

If you are using a user-supplied calibration wire (with an 871FT or 871EC sensor)


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When your 871FT sensor was manufactured if you are using a Foxboro calibrationcable

When your 871FT sensor was manufactured if your 871FT sensor has a patch cordcable connection.

The date of manufacture is determined from the last four digits of the Origin Date

Code found on the sensor data plate. A code of 2B0149 means the sensor wasmanufactured in week 49 of 2001,

Use the following formula to calculate full scale loop resistance if using a Foxborosupplied calibration cable and your 871FT sensor has an Origin Date code of 2B9710or later.

(Cf(geom)100025)/(FS in mS/cm) = Loop R in ohmswhere

Use the following formula to calculate full scale loop resistance:

If using a user-supplied calibration wire looped through an 871FT or 871EC sensor

If using a Foxboro calibration cable andyour 871FT sensor has an Origin Date Codeearlier than 2B9710

If using an 871FT sensor with a patch cord cable connection and your sensor has anOrigin Date Code after 2B04xx.

(Cf(geom)1000)/(FS in mS/cm) = Loop R in ohms

where

Cf(geom) = geometric cell factor for the sensor being calibrated, found in Table 13.

FS = Full Scale conductivity value expressed in mS/cm

R = Resistance value, in ohms, to set on the decade resistance box.

Cf(geom) = geometric cell factor for the sensor being calibrated, found in Table 13.

FS = Full Scale conductivity value expressed in mS/cm

R = Resistance value, in ohms, to set on the decade resistance box.


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Example:

Calibrate an 871FT-1F English Sanitary Flow-Thru Sensor with Full ScaleConductivity = 500 S/cm using a Foxboro calibration cable.

From Table 13, Cf(geom)= 1.11 cm-1

.R = (1.1110001)/(0.5) = 2220 ohms for a sensor with a pre-2B9710 OriginCode.

R = (1.11100025)/(0.5) = 55,500 ohms for a sensor with an Origin Code of 2B9710 or later.

The resistance values calculated in the preceding formulas and example assume asingle loop or turn through the sensor as shown in Figure 15. When very smallresistances (less than 10 ohms) are required, and are not available using equipment at

Table 13. Cell Factors

871EC Sensor871FT English

Flow-Thru Sensor Other Sensors

Sensor

Type

Geometric

Cell Factor

Sensor

Type

Geometric

Cell Factor

Sensor

Type

Geometric

Cell Factor

-AB-BW-EV-HP-LB-NL-PN-PX-RE

-SP-TF-UT-PP-PT

0.5880.8730.452.150.8732.352.452.450.873

2.152.310.8732.1852.185

-1C-2C-1D-2D-1E-2E-1F-2F-1G

-2G-1H-2H-1J-2J-3C-4C-3E-4E-3F-4F

-3G-4G-3H-4H-3J-4J

11.6011.604.144.142.672.671.111.110.62

0.620.380.380.210.213.023.021.061.060.490.49

0.490.490.250.250.150.15

EP307BEP307GEP436E

2.492.492.185


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hand, you can loop the decade box wire several times through the sensor and thenmultiply RCby the square of the number of loops used.

RL= n2RC

where:RC= Resistance required from calculationn = Number of loops through sensor donut

RL= Resistance to use through loop.

Example:

Calibrate an 871FT-3G English Industrial Flow-Thru Sensor with a full scaleconductivity = 500 mS/cm.

From Table 13, Cf(geom)= 0.49 cm-1.

R = (0.4910001)/(500) = 0.98 ohms for a sensor with a pre-2B9710 OriginCode.

R = (0.49100025)/(500) = 24.5 ohms for a sensor with an Origin Code of2B9710 or later.

The resistance calculated in the first formula (0.98 ) is less than 10 ohms. Therefore, use10 turns of wire. Assure you are using a full 10 turns. With 10 turns of wire, multiply theresistance value by 102or 100 and use a resistance of 98 ohms to calibrate the full scalevalue to 500 mS/cm.

4. At the CONNECT LOOP RESprompt, connect the loop resistance through thesensor as shown in Figure 15.

NOTEFor optimum performance, use discrete metal film resistors and a single turn of 16AWG or larger wire.

Figure 15. Connection of Loop Resistance

5. Press the ENTERkey. The display will read VALUEand a value. When stability isachieved, edit the displayed value as required. Press ENTER. When the calibration is

DECADERESISTANCEBOX

SENSORSENSOR

DECADERESISTANCEBOX

LOOP WIRE THROUGH BOTTOM HOLEAND OUT ONE SIDE OF LATERAL HOLE


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complete, the display will indicate CAL COMPLETE. If a calibration error occurs,the display reads CAL ERRORand returns you to the beginning of the procedure.

Documentation of Calibration Procedure

Next, optionally follow the prompts to enter the calibration date and name of the calibrator. The

date should be in the form mm/dd/yy. The name of the calibrator can contain up to sixcharacters.

TroubleshootingIf your conductivity reading is not what you expect, your RTD may be bad. To check this,compare the resistance across transmitter Terminals 6 and 7 with the appropriate value inTable 14.

Table 14. Temperature vs. RTD Resistance

Temperature 100 Ohm RTD100 Ohm RTD

(MIL SPEC) 1000 Ohm RTD

C F Ohms Ohms Ohms

-5 +20 98.04 98.01 980.4

0 32 100.00 100.00 1000.0

10 50 103.90 103.98 1039.0

20 68 107.79 107.94 1077.9

25 75 109.73 109.92 1097.3

30 86 111.67 111.89 1116.7

40 104 115.54 115.83 1155.4

50 122 119.40 119.77 1194.0

60 140 123.24 123.69 1232.4

70 158 127.07 127.60 1270.7

80 176 130.89 131.49 1308.9

90 194 134.70 135.37 1347.0

100 212 138.50 139.24 1385.0

105 225 140.39 141.17 1403.9

110 230 142.28 143.10 1422.8

120 248 146.06 146.95 1460.6

130 266 149.82 150.79 1498.2

140 284 153.58 154.61 1535.8

150 302 157.32 158.42 1573.2

160 320 161.04 162.22 1610.4

170 338 164.76 166.01 1674.6

180 356 168.47 169.79 1684.7


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Maintenance

WARNING!

This product contains components that have critical safety characteristics. Do notsubstitute components. Replace components only with identical factory suppliedcomponents. Component substitution may impair the electrical safety of this

equipment and its suitability for use in hazardous locations.

The maintenance of the 870IT transmitter is limited to replacement of the keypad, the coreprinted wiring assembly (PWA), and the sensor PWA. See Parts List PL 611-156 for partnumbers. Attempts to repair printed wiring assemblies could result in damage and voiding of thewarranty. The recommended repair procedure is replacement of the PWA or return of the PWAto the factory for repair.

190 374 172.16 173.42 1721.6

200 392 175.84 177.23 1758.4

210 410 179.51 181.05 1795.1

Table 14. Temperature vs. RTD Resistance (Continued)

Temperature 100 Ohm RTD100 Ohm RTD

(MIL SPEC) 1000 Ohm RTD

C F Ohms Ohms Ohms


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Appendix A. Structure Diagrams

Top Level Structure Diagram

CONFIG

CONFIG

CONFIG

CONFIG

CONFIG

CONFIG

CONFIGX

CONFIGX

CONFIGX

CONFIG

CONFIG

CONFIG

CONFIG

CONFIG

APPLS

SENSOR

DISPLAY

TEMPCOMP

CONFIG

CHEMCOMP

OUTPUT

TEMP

DAMPING

INSTRMNT

TIMEOUT

PASSCODE

DIAGS

STRINGS

NUM APPS

TRIGGER


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CONFIG

APPLS

APPLS

PASSCODE

If PASSCODE MAJOR 0000

123AUTO

If NUM APPS >1

If NUM APPS=3

CONFIGSENSOR SENSOR

ABBWEVHPLBNLPNPXRESPTFUTOTHER CELLFACT

CONFIG DISPLAY

(see next page)

Structure Diagram 1

CONFIGURATION


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Appendix A. Structure Diagrams MI 611-212 April 2009

43

CONFIGx

DISPLAY

DISPLAY

PRIMARY

PRIMARYUNITS

UNITS

S/cmmS/cm%CUSTOM CUSTOM

PRIMARYSCALE

SCALE

If UNITS =S/cm

If UNITS = mS/cm

50.00S

100.0S200.0S500.0 S

1000. S5000.S

If SENSOR = LB, UT, OTHER

If SENSOR = AB, BW, EV, LB, RE, UT, OTHERIf SENSOR = LB, UT, OTHER

If SENSOR = AB, BW, EV, LB, RE, UT, OTHERAll sensors

All sensors

CONFIG SENSOR(see previous page)

All sensors

All sensors

All sensors

All sensors

All sensors

All sensors

All sensorsAll sensors

If SENSOR LB, UTIf SENSOR LB, UT

If SENSOR AB, BW, EV, LB, RE, UT

1.000 mS

2.000 mS

5.000 mS

10.00 mS

20.00 mS

50.00 mS

100.0 mS

200.0 mS

500.0 mS

1000. mS

2000. mS

%g/lppmoz/galpptS/mNONE

If UNITS =S/cm or mS/cm

PRIMARY SCALE (cont.)(see next page)

Structure Diagram 2

CONFIGURATION (cont.)

CONFIG xTEMPCOMP

DISPLAYSECOND


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If UNITS = %

PRIMARYSCALE

SCALE

NaCl

H3PO4

HCl

H2SO4

50C REF

30C REF

25C REF

42 - 18%

0 - 10%

OLEUM

HNO3

NaOH NaOH

HNO3

OLEUM

50C REF

30C REF

25C REF

99.5 - 93%

99.5 - 93%

0 - 25%

42 - 18%

0 - 10%

65C REF

65C REF

0 - 10%

25C REF

50C REF

100C REF

0 - 15%

0 - 20%

25C REF

0 - 15%50C REF

100C REF

NaCl

H3PO4

HCl

H2SO4

0 - 25%

0 - 35%

0 - 15%

KOH

KCl

CH3OOH

HF

0C REF

25C REF

KOH

KCl

CH3OOH

HF

0C REF

25C REF

0 - 6%

0 - 16%

0 - 8%

99 - 90%

0 - 30%

DISPLAY SECOND

DISPLAY

PRIMARY

(see next page)

Structure Diagram 3



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SECONDDISPLAYSECOND

CONFIGxDISPLAY

CONFIGxTEMPCOMP

TEMPCOMP

ABSOLUTENaCl

Structure Diagram 4


GRN LIQRBLK LIQRH3PO4HClH2SO4

OLEUM

0 - 10%42 - 18%

50C REF30C REF25C REF

NaCl

H2SO4

OLEUM

0 - 10%42 - 18%

65C REF

65C REF

50C REF99.5 - 93% 30C REF99.5 - 93% 25C REF

0 - 25%

HNO3NaOH

NaOH

25C REF50C REF

100C REF

25C REF0 - 15% 50C REF

0 - 15% 100C REF

0 - 20%

KOHKClCH3COOHHF

NaOH

90 - 99%

0 - 30%

0C REF

25C REF

HF

0C REF25C REF

LINEARLINEAR

REF TEMP NUM PTS

TEMPxx VALxx

TEMPxx+1 VALxx+1

CUSTOM

If UNITS = S/cm or mS/cm

CONFIGx TEMPCOMP

if UNITS = CUSTOM

(see next page)

DILUTE0 - 25%

TEMPABSOLUTEmA


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Structure Diagram 5


REF TEMP NUM PTS

TEMPxx VALxx

TEMPxx+1 VALxx+1

CONFIGx TEMPCOMPif UNITS = S/cm or mS/cm

(see previous page

UNITSCONFIGxTEMPCOMP

NUM PTS

ABSSCALE CUSSCALE

ABSxx NEWxx

UNITSCONFIGxCHEMCOMP

ABSxx+1 NEWxx+1

.99999.99999.99999.99999

.99999.99999.99999.99999

S/cmmS/cm

S/cmmS/cm

If UNITS = CUSTOM

CONFIGx OUTPUT(see next page)


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Structure Diagram 6


CONFIGx CHEMCOMP

(see previous page

ABSOLUTEMEASURETEMP

OFF

ONPULSE

CONFIGOUTPUT

MODE

DIGITALANALOG

OUTPUTANALOG

ANALOG

OUTPUTRANGE

MIN MAX

OUTPUTFAILSAFE

FAILSAFE

DC mA

CELSIUSFAHREN

AUTO

MANUAL

RTD100 kOHM

2 WIRE

3 WIRE

CONFIGTEMP

TEMPUNITS

UNITS

TEMPMODE

MODE

FAIL SIG

MANUAL

TEMPTYPE

TYPE

RTD

2 WIRE

3 WIRE

100 OHM1000 OHM

100 OHM1000 OHM

CONFIG

DAMPING1 SEC5 SEC10 SEC20 SEC40 SEC120 SEC

DAMPING

CONFIG INSTRMNT(see next page)


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Structure Diagram 7


CONFIG DAMPING(see previous page)

CONFIGINSTRMNT

INSTRMNT mA CAL4 mA

20 mA

4 mA

20 mAmA CAL

mA CAL

If ANALOG

INSTRMNTSTAB IND

STAB INDMEAS

MEASMEAS

ONOFF

MEAS

ONTIME

TIME

ONVAR

VAR

STAB INDTEMP

MEASMEAS

ONOFF

TEMP

ONTIME

TIME

ONVAR

VAR

CONFIGTIMEOUT

TIMEOUT

PASSCODEMINOR

MINOR

PASSCODEMAJOR MAJOR

CONFIGPASSCODE

CONFIG DIAGS

(see next page)

If Passcode Accepted


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Structure Diagram 8


CONFIG PASSCODE(see previous page)

CONFIGDIAGS

DIAGS

CLEARENABLE

LEAKAGE

CLEARENABLEDISABLE

ATCSHORT

CLEARENABLEDISABLE

ATC OPEN

CLEARENABLEDISABLE

STRINGSTAG NUM

TAG NUM

STRINGSTAG NAME

TAG NAME

CONFIGSTRINGS

STRINGSLOCATE

LOCATE

STRINGSDEV NAME

DEV NAME

CONFIG NUM APPS

(see next page)

4 - 20 RNG

CLEARENABLEDISABLE

COMP RNG

CLEARENABLEDISABLE

MEAS RNG

CLEARENABLEDISABLE