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Sml G't,_flr HORIBA
Automotive Emission Analyzer MEXA-584L
.Instruction Manual CODE:12000523000H-3100191322-GZ0000061994H
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Preface This manual describes the operation of the Automotive Emission Analyzer, MEXA-584L.
· Be sure to read this manual before using the product to ensure proper and safe operation of the instrument. Also safely store the manual so it is readily available whenever necessary.
Product specifications and appearance, as well as the contents of this manual are subject to change without notice.
• Warranty and Responsibility HORIBA warrants that the Product shall be free from defects in material and workmanship and agrees to repair or replace free of charge, at HORIBA's option, any malfunctioned or damaged Product attributable to HORIBA's responsibility for a period of one (1) year from the delivery unless otherwise agreed with a written agreement. In any one of the following cases, none of the warranties set forth herein shall be extended;
• Any malfunction or damage attributable to improper operation • Any malfunction attributable to repair or modification by any person not authorized by
HORIBA • Any malfunction. or damage attributable to the use in an environment not specified in this
manual • Any malfunction or damage attributable to violation of the instructions in this manual or
operations in the manner not specified in this manual • Any malfunction or damage attributable to any cause or causes beyond the reasonable
control of HORIBA such as natural disasters • Any deterioration in appearance attributable to corrosion, rust, and so on • Replacement of consumables
HORIBA SHALL NOT BE LIABLE FOR ANY DAMAGES RESULTING FROM ANY MALFUNCTIONS OF THE PRODUCT, ANY ERASURE OF DATA, OR ANY OTHER USES OF THE PRODUCT. .
• Tra:cfemarks Generally, company names and brand names are either registered trademarks or trademarks of the respective companies.
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Conformable Directive This equipment conforms to the following directives and standards:
Directives:
CE: Standards:
the EMC Directive 89/336/EEC, in accordance with Article 10 ( 1) of the Directive the Low Voltage Directive 2006/95/EC [the EMC Directive] EN61326-1: 2006 Class A, Industrial requirements [the Low Voltage Directive] EN61010-1: 2001
• Installation Environment This product is designed for the following environment.
• Installation Categories II • Pollution degree 2
• Information on Disposal of Electrical and Electronic Equipment and Disposal of Batteries and Accumulators
The crossed out wheeled bin symbol with underbar shown on the product or accompanying documents indicates the product requires appropriate treatment, collection and recycle for waste electrical and electronic equipment (WEEE) under the Directive 2002/96/EC, and/or waste batteries and accumulators under the Directive 2006/66/EC in the European Union.
The symbol might be put with one of the chemical symbols below. In this case, it satisfies the requirements of the Directive 2006/66/EC for the object chemical.
This product sh<;>uld not be disposed of as unsorted household waste. Your correct disposal of WEEE, waste batteries and accumulators will contribute to reducing wasteful consumption of natural resources, and protecting human health and the environment from potential negative effects caused by hazardous substance in products.
Contact your supplier for information on applicable disposal methods.
l !• ~ :
!i I
FCC Rules Any changes or modifications not expressly approved by the party responsible for compliance shall void the user's authority to operate the equipment.
• Note This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
• Reorient or relocate the receiving antenna. • Increase the separation between the equipment and receiver. • Connect the equipment into an outlet on a circuit different from that to which the receiver
is connected. • Consult the dealer or an experienced radiorrv technician for help.
I I-
For your safety Warning messages are described in the following manner. Read the messages and follow the instructions carefully.
• Meaning of warning messages
&DANGER This indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. This signal word is to be limited to the most extreme situations.
I:\. WARNING This i~dicates a pote~tiall~ ~azardous situation which, if not avoided, could ~ result m death or senous mJury.
&CAUTION
This indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury. It may also be used to alert against unsafe practices. Without safety alert indication of hazardous situation which, if not avoided, could result in property damage.
• Symbols
Description of what should be done, or what should be followed
Description of what should never be done, or what is prohibited
• Safety Precautions This section provides precautions to enable you to use the product safely and correctly and to prevent injury and damage. The terms of DANGER, WARNING, and CAUTION indicate the degree of imminency and hazardous situation. Read the precautions carefully as it contains important safety messages.
I('\ Do not disassemble or modify the product. \Y It may cause an electric shock.
•
Discharge the gas from the exhaust outlet to a safety place. The emission gas to be measured contains hazardous components, and it may cause a toxic symptom .
•
Use the specified power supply and ground the product. Connecting the product to improper power or using it without grounding may cause a malfunction, fire or electronic shock.
I('\ Do not spill water or volatile/flammable liquids (thinner, alcohol, benzene, gasoline, etc.) over the \Y product nor put these liquids into the product, or it may cause a failure to the product or a fire .
• For the power supply, use the power cable which is supplied with the Instrument or purchased from Horiba officially.
Points of concern Use of the equipment in a manner not specified by the manufacturer may impair the protection provided by the equipment. And it may also reduce equipment performance. Exercise the following precautions:
• Do not use the product for any purpose other than the emission gas measurement. • Do not make the product inhale dirt or dust. It may affect the measurement results. • Do not expose to direct sunlight or install in a vicinity of air conditioning devices. Ambient
temperature fluctuation may increase the measurement error or cause a malfunction.
Disposal of the product When disposing of the product, follow the related laws and/or regulations of your country for disposal of the product.
Description in this manual
------------This Interprets the necessary points for correct operation and notifies the important points for handling the unit.
-f~~f~~~D9:~~----------------------------This indicates the part of where to refer the information.
-Tip This indicates reference information.
Contents -~™~--~~~~~~-~'Sf~~~
1 OUTLINE . ....................................... . 1
1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.3 Parts Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 Operation Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2 SET UP ......................................... . 10
2.1 Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 O
2.2 Utilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.2.1 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.2.2 Calibration Gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.3 Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2.3.1 Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2.3.2 Connection of Optional/External Instrument . . . . . . . . . . . . . . . . . . . 13 2.3.3 Connection of Power Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3 BASIC OPERATION ............................... . 16
3.1 Power On and Warm-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.2 Gas Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.3 Measurement . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.4 Power Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
4 FUNCTIONS ..................................... . 26
4.1 STANDBY Mode...................................... 26
4.2 MEAS Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.3 MENU Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 4.3.1 Leak Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 4.3.2 HC Hang-up Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 4.3.3 Gas Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 4.3.4 Two Speed Idle Test (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 4.3.5 Data Entry Function ...................... •.-. . . . . . . . . . . . . . 34
5 SIGNAL INPUT/OUTPUT ......................... · .. . 39
5.1 External Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 5.1.1 Printer Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 5.1.2 Digrtal Input/Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6
7
5.1.3 Analog Output {optional) ................................. .
MAINTENANCE • • • • • • • • • • • • • • • • • • • -. • • • • • • • • • • • • • • •
6.1
6.2
6.3
6.4
Periodical Maintenance ............................... . 6.1.1 Filter Element Check .................................... . 6.1.2 Check of Probe, Tubes and Pump ......................... . 6.1.3 Leak Check ........................................... . 6.1.4 HG Hang-up Test ...................................... . 6.1.5 Check of Ventilation Filter ............................. : .. .
Replacing the 0 2 sensor and the NO sensor ............... .
Trouble Shooting .................................... .
Consumable Parts List ................................ .
REFERENCE .................................... .
7.1
7.2
Specifications ....................................... . 7.1.1 7.1.2 7.1.3 7.1.4
System Outline ........................................ . Configurations/Conditions ................................ . Performance .......................................... . Options .............................................. .
Lambda Formula with 0 2 Measurement . · .................. .
40
41
41 42 44 45 47 48
49
50
51
52
52 52 53 54 55
57
1 OUTLINE
1 OUTLINE
1.1 Introduction MEXA-584L is designed for use in auto repairs, inspections, safety checks and general engine tune-ups, which offers a measuring range that is strictly set to the suitable levels for such operation. It allows you to simultaneously measure concentrations of CO, HC and CO2 in engine emission in idle states. It can also measure the air-to-fuel ratio (AFR) or excess air ratio (l) of test engines. Light weight and compact enough, it can be fit at any work situation. Moreover, with a clear LCD and effortless operation, it can be used as a simple measurement instrument in other than the auto repair field.
1
1 OUTLINE
1.2 Unpacking Check the contents of package. Make sure that all required items are enclosed.
Main unit Drain separator ✓ Sampling tube (5 m) (
Probe assembly Hose clip (13 mm I.D.) Leak check cap
Filter elements set .,1 Grounding cable (3 m) 1 ·✓ Storage cover
Instruction manual ✓
Fig. 1 Standard accessories
2
NO sensor
Oil temperature sensor
Analog cable
Drain separater (External type)
0 2 sensor
Printer
Power cable
Fig. 2 Option
3
1 OUTLINE
Tachometer
-~ Printer cable
Gas cylinder
1 OUTLINE
1.3 Parts Description
No.
1
2
3
4
5
6
7
*1:
*2:
Fig. 3 MEXA-584L main unit (front and top view)
Table 1 Name and function of parts
Names Descriptions
Display LCD
Operation keys Switches screen and indication, and selects each functions
Sample inlet Introduces the sample gas
Drain separator Separates water drop from the sample gas
Dust filter unit Removes dusts in the sample gas
Calibration gas inlet Introduces the calibration gas
Ventilating hole/filter Cooling air inlet
Close the inlet by the attached ruboer cap to avoid dust when not used.
Do not block this inlet or insert anything into It.
4
5
6 i. I.
'
7
4
Remarks
*1
*2
1 OUTLINE
6 7 8 9
14 13
Fig. 4 MEXA-584L main unit (rear view)
Table 2 Name and function of parts
No. Names Descriptions Remarks
1 Radiation vents Cooling air outlet *1
2 NO sensor Measures NO concentration Optional
3 0 2 sensor Measures 0 2 concentration Optional
4 Strainer unit For protecting pump In drain line *2
5 EXHAUST outlet Sample gas outlet *3
6 RPM connector For tachometer Optional
7 TEMP connector For oil temperature sensor Optional
8 EXT SIGNAL
For thermometer tachometer Optional connector
9 PRINTER connector Connects optional serial printer •4
10 ANALOG connector Connects optional analog cable 0Vto1V, optional
11 HOST connector Connects a RS-232C cable
12 Power switch Turns the power on
13 Power inlet Connects the power cable
In the case that the power cable cannot be 14 Ground terminal connected to ground terminal directly, use •5
this terminal.
*1: Do not block these vents or insert anything Into them.
*2: Do not insert the strainer (element) into the EXHAUST outlet.
*3: Connect a tube of 15 mm I.D. and lead its other end to a place with good ventilation.
*4: Be sure to turn the power switch off before connecting the printer.
*5: Be sure to ground the MEXA-584L when installing it.
5
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1 OUTLINE
No.
1
2
3
4
1
.~
3
Fig. 5 Sampling probe
Table 3 Name and function of parts
Names Descriptions Remarks
Probe Insert the probe into the tail pipe of a test vehicle.
Pre-filter unit Removes oil mist or dust in the emission gas
Sampling tube Introduces the sample gas to the main unit
Drain separator Separates moisture in the emission gas
6
1 OUTLINE
2
3
4
5
6
9 8 7
Fig. 6 Operation keys on front panel
Table 4 Name and function of keys
No. Names Descriptions Remarks
1 MEAS key Goes to MEAS mode and starts measurement/ holds the readings
2 STANDBY key Stops measurement and goes to STANDBY mode
3 Cyclic key ( () ) Rotates layout of display
4 MENU key Displays the MENU screen
5 SELECT1 key Performs indicated action
6 SELECT2 key Performs indicated action
7 Arrow key (•) Controls cursor position/prints out the measurement results
8 Arrow key (A) Controls cursor position/lncreases selected setting value/turns on/off the backlight
9 Contrast keys ( + - ) Adjusts contrast of LCD
7
1 OUTLINE
1
3
4
7
No.
1
2
3
4
5
6
7
8
*1:
*2:
,. 1.23 ol
·.ti..\ 4 I -123 0 ppmval . I ~ .., j 1 Z34%vol
LAMBDA \.?/ 1.234 . ____. .. -------
1. OP /R HIGH I lEMP LEAK HANG RPM '\ 29:59 - ZERO' J~) ~ .... (ID.
Fig. 7 Monitor display
Table 5 Name and function of display
Names Descriptions
Status Current status
Date and time Current date and time
Measured items Indicates the measured components
Indicates unstableness or scale over of
Unstable/High readings ? : Scale over
concentration sign A: Unstable (increasing) T: Unstable (decreasing)
Measured values Measured concentrations/readings
Key indicator SELECT 1 function is displayed here
Engine speed 0.5/1.0/2.0 pulse/round High/STD sensitivity is displayed.
Alarm/Error Alarm/error information
Displayed items can be switched by the cyclic key.
Measurement of 0 2 , NO, RPM and TEMP is optional.
8
2
5
6
8
Remarks
*1, 2
1 OUTLINE
1.4 Operation Flow
Power ON !
- - - 't - - , "EXl1j" key I .+-------~ : Warm-up I I
- - - f<5 mi~utes) ...__--;,.,:r=====;i j MENU key
Leak Date key Check /Time
MENU HC Hang- H/C,
,----·-------- '--·-·-·---- ·7 up Test 0/C
i rr=====, l i i i i
STANDBY key i
i i i i i i
STANDBY
MEAS key
MEAS
Gas Standard Calibration Value
i"EXITi" key • I I • i i ! Data Printer i l ~~ i
i ~======~ ~======~i i i i Two speed RPM l i idle test 1
! -~=-~ . I ~--~ ~--~ l i--·-·-·-·-·-·-·-·-·-·-·-·-·-·----·-·-·-·-·-·-·-·-·-·-·-·-·-·-' ""'·-·-·-·-·-·-·-·-·-·-·-·-·-·-
Screens/Mocfes for measurements Screens for checks and condition settings
* Only the leak check function and data entry function can be used under the warm-up sequence.
Fig. 8 Operation flow
9
I ,,
2SETUP
2 SET UP This chapter describes the environmental requirements and connections of the power/signal lines and gas piping.
2.1 Environmental Conditions The environmental requirements for the MEXA-584L are listed below.
Temperature Environmental temperature shall be stable and within the range of 0°C to 45°C (or 5°C to 40°C for OIML conformity). Temperature variation shall be within ±5°C.
Humidity Relative humidity shall be stable and less than 90% {without dew).
Ambient pressure Ambient pressure shall be stable and within 80 kPa to 106 kPa {-300 m to 2100 m as altitude).
Radiation heat No direct sunlight or radiation heat from heated object nearby.
Rain and surrounding chemicals The MEXA-584L should be installed at weatherproof indoors. Do not expose the instrument to any liquid, such as water, benzene or gasoline, and/or corrosive gases.
Exhaust Exhaust from the MEXA-584L must be evacuated safely under atmospheric pressure. Do not block the exhaust line by pressing or bending.
Vibration Do not expose the MEXA-584L to strong vibration and/or mechanical shock. Electromagnetic field Do not expose the MEXA-584L to strong electromagnetic field.
10
2SETUP
2.2 Utilities
2 .. 2.1 Power Supply The power supply specification for the MEXA-584L is as follows.
Table 6 Power supply
Connector Voltage Capacity
Power inlet 100 V to 240 V AC,
Approx. 90 VA at stable state 50 Hz to 60 Hz, single phase
2.2.2 Calibration Gases The calibration gases required for the MEXA-584L are as follows.
Table 7 Calibration gases
Gas Specification Remarks
Zero Gas (Ambient air purified by built-in filters)
(CO, CO2, HG)
Zero Gas (Ambient air purified by built-in filters) ·
Only when NO sensor is (NO) installed (optional)
Span Gas Standard gas container which contains (CO, CO2, HG) CO, CO2, and G3H8 in N2
Span Gas Standard gas container which contains Only when NO sensor is (NO) NO in N2 installed (optional)
Span Gas (Ambient air purified by built-in filters)
Only when 0 2 sensor is (02) installed (optional)
------------• For CO, CO2 and HC calibration, gas cylinder.; that contain one or plural of these components are
also available. • It is required to supply the gas at pressure of approx. 100 kPa at gas calibration.
11
2SET UP
2.3 Preparation
2.3.1 Gas Piping
Dust filter
(1) Connect sampling tube 1 • l (2) Check filter elements
.. ti 18~1 /!01., ___ 7\ """"'""- -::ts, _ ---, ' _ Stralo" _
~a' ' I l&ri ~ ---~ ~ ~--.-------' ' ______ J
~--
9' l) I O-ring
~H-cHp
Fig. 9 Gas piping
e (1) Connecting sampling probe
• Procedure 1. Connect the sampling tube to the pre-filter. 2. Turn the box nut manually, and tighten it firmly until it is fixed. 3. Connect the other end of the sampling tube to the drain separator with a hose clip. 4. Confirm that an O-ring Is flt into the slit around the sample inlet. 5. Plug the drain separator into the sample inlet and fully turn it clockwise.
e (2) Checking filter elements Make sure that clean elements are set in the pre-filter, dust filter and strainer. Refer to " 6.1.1 Filter Element Check" (page 42) for detailed information.
e (3) Connecting exhaust line
0 Discharge the gas from the exhaust outlet to a safety place. The emission gas to be measured contains hazardous components, and it may cause a toxic symptom.
Connect a tube of 15 mm I.D. and lead its other end to a place with good ventilation.
12
, . i
2SET UP
2.3.2 Connection of Optional/External Instrument Connect optional sensors, printer or other external instruments if necessary. The relevant connectors are listed below.
Table 8 Connectors for optional sensors and external instruments
Instruments Connectors Remarks
Tachometer RPM connector SL06003
Oil temperature sensor TEMP connector SL51080 898
Printer PRINTER connector CBM-91011 or equivalent one, Refer to• 5.1.1 Printer Output" (page 39).
Analog recorder/data logger ANALOG connector Refer to• 5.1.3 Analog Output (optional) " (page 40).
Thermometer tachometer EXT SIGNAL connector CAP8950
------------Be sure to turn the power switch off before connecting the signal lines for tachometer, temperature sensor, printer, analog output and host communication.
Fig. 10 Location of the signal connectors
13
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!
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ii'l t I
!
2SETUP
e Installation of tachometer
• Procedure 1. Make sure that the power switch is turned off. 2. Connect an optional tachometer to the PRM connector. 3. Pinch the secondary line of the engine plug by the clamp of the sensor. 4. Make sure that the arrow symbol on the clamp goes to the engine plug.
e Installation of oil temperature sensor
• Procedure 1. Make sure that the power switch is turned off. 2. Connect an optional temperature sensor to the TEMP connector. 3. Take out the oil level gauge from the engine 4. Insert the temperature sensor into the port for the level gauge.
,·------------------------To oil temperature sensor, ',
I \
.,
I I
I , .-" Arrow
\
' ' To tachometer , ,
.,
- ...
I ,
~------------------------•' Fig. 11 Connection of tachometer and oil temperature sensor
14
2 SETUP
2.3.3 Connection of Power Lines
Ground terminal
Power connector
Fig. 12 Location of the power switch and fuse
e Connecting Power Line
A Use the specified power supply and ground the product. V Connecting the product to improper power or using it without grounding may cause a malfunction, fire
or electronic shock. .
------------For the power supply, use the power cable which is supplied with the instrument or purchased from Horiba officially.
• Procedure 1. Make sure that the power switch is off. 2. Connect the power cable which is packed as an optional accessory to the power
inlet. 3. Connect the ground line of the cable to the terminal.
4. Connect the power plug to an AC power source.
------------In the case that the power cable can not be connected to ground terminal directly, use the accessory cable to ground the terminal.
15
i' I 'I
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3 BASIC OPERATION
3 BASIC OPERATION This chapter explains the basic operation in daily measurements.
3.1 Power On and Warm-up
• Procedure 1. Confirm that the elements in pre-filter, dust filter and strainer are clean. 2. Turn the power switch on.
Fig. 13 Power on
3. Wait u_ntil the warm-up sequence (for 300 seconds) is completed. The instrument goes into the STANDBY mode as an initial status.
STANOBY 09:59 30-07-2006
co 1.23~,vol WARMING UP HC 12340 pprnvol
• COz 12;34~vol LAMDA 1.230
Count down
Fig. 14 Warm-up sequence and STANDBY mode
------------• During the warm-up sequence, remaining time (In seconds) Is displayed on the screen. • Elements in pre-filter, dust filter and strainer should be typically checked once per day before
measurements. Refer to "6.1.1 Filter Element Check" (page 42) for detailed Information. • The leak check function and data entry function in the MENU mode can be used under warm-up
sequence., Refer to " 4.3.1 Leak Check " (page 28) and "4.3.5 Data Entry Function " (page 34) for detailed information. ·
16
3 BASIC OPERATION
3.2 Gas Calibration The gas calibration sequence consists of several steps for calibrating CO, HC, CO2, 0 2 and NO. The calibration steps for the 0 2 and NO are included only when the instrument is equipped with optional sensors for these components.
• Procedure
Sequence start 1. Press the "MENU" key under the STANDBY mode.
The instrument goes into the MENU mode.
STANDBY
co HC COi LAMDA
09:59 30-07-2006
1,23~,vol t.ENU
1 LEN< CHECK
2 ~ ~(V, TEST
,~:CALI~;;_,\ --------4 OATAENlRY
5 TWO SPEED IDLE TEST
Fig. 15 MENU screen
2. Move the cursor to "GAS _CALIBRATION" by the arrow("' •) keys. 3. Press the "SELECT" (SELECT1) key.
The zero calibration sequence starts automatically.
"1EIIU
1 LEJ\KO£CK
2 ~ HANaUP TEST
I\! GAS CALIBRATION
4 DATA ~TRY
5 TWO i.'EED IOLE TEST
Fig. 16 Zero calibration sequence before the gas calibration
17
f :
)1.
'I: i': i• .
3 BASIC OPERATION
4. Wait until the sequence ls completed. The GAS CALIBRATION screen for 0 2 (or CO) appears.
_ Tip If an o2 sensor Is installed In the Instrument, the ambient air is introduced as 0 2 span gas and the 0 2 calibration screen appears. If not, the CO calibration screen is displayed with skipping the 0 2 calibration step.
GAS GAUBRA TION
Fig. 17 GAS CALIBRATION screen (for 0 2 calibration)
0 2 calibration step (only when the 0 2 sensor is installed) 1. Set the span gas concentration for 0 2 by the arrow(• •) keys. 2. Confirm that the readings shown on the screen is stable, and press the "CAL"
(SELECT1) key. 3. Confirm that the 0 2 calibration is completed properly, and press the "NEXT"
(SELECT2) key. The GAS CALIBRATION screen for CO appears.
------------The 0 2 sensor is consumables. Warranty period for the 0 2 sensor is one year (at 20.9 %vol 0 2, 25°C, 50% as relative humidity) after delivery In case that It Is supplied by HORIBA. If the sample gas contains the corrosive gas or poinsonlng substance, it is possible that the sensor is in poor condition in a short time. The sensor should be replaced when alarms (02 and !) appear on ·the bottom right-hand corner of the GAS CALIBRATION screen.
GAS CALIBRATION
,,,:;- - ... ; '""7 60 \ I ~,~. ~ol ... -"'tl~CJ-9,gg)
CO 9.60 'llvol
Fig. 18 GAS CALIBRATION screen ·(for CO calibration)
18
3 BASIC OPERATION
CO calibration step 1. Set the span gas concentration for CO by the arrow (.A. •) keys. 2. Connect a standard gas cylinder containing CO, HC and CO2 to the calibration gas
inlet and make the gas introduced.
Fig. 19 Introducing calibration gas
3. Confirm that the readings shown on the screen is stable, and press the "CAL" (SELECT1) key.
4. Confirm that the CO calibration is properly completed, and press the "NEXT" (SELECT2) key. The GAS CALIBRATION screen for HC appears.
GAS CALIBRATION
HC HC
Fig. 20 GAS CALIBRATION screen (fe>r HC calibration)
HC calibration step 1. Set HC span concentration as C3H8 by the arrow {.A. •) keys. 2. Confirm that the standard gas cylinder is connected to the calibration gas inlet and
that the gas is introduced. 3. Confirm that the readings shown on the screen is stable, and press the "CAL"
(SELECT1) key.
19
!'
.i I ,1 I,
3 BASIC OPERATION
4. Confinn that the HC calibration ls properly completed, and press the "NEXT" (SELECT2) key. The GAS CALIBRATION screen for CO2 appears.
GAS CALIBRATION
CO2 10.60 "vol
Fig. 21 GAS CALIBRATION screen (for CO2 calibration)
CO2 calibration step
1. Set the span gas concentration for CO2 by the arrow(.&. •) keys. 2. Confirm that the standard gas cylinder is connected to the calibration gas inlet and
that the gas is introduced.
3. Confirm that the readings shown on the screen is stable, and press the "CAL" (SELECT1) key.
4. Confinn that the CO2 calibration is properly completed, and press the "NEXT" (SELECT2) key.
5. Disconnect thS gas cylinder from the calibration gas inlet, and close the gas inlet by the attached rubber cap.
- Tip If a NO sensor Is installed in the Instrument, the GAS CALIBRATION screen for NO appears. If not, the Instrument goes back to the MENU mode.
GAS CALIBRATION
NO
-- -- ... I ... DE "'\ ~ ~860 l]Pmvol
'(~'-"56d!'.i)
2060 ppmvol
Fig. 22 GAS CALIBRATION screen (for NO calibration)
20
3 BASIC OPERATION
NO calibration step (only when the NO sensor is installed) 1. Set the span gas concentration for NO by the arrow(• •) keys. 2. Connect a NO standard gas cylinder to the calibration gas inlet and make the gas
introduced. 3. Confirm that the readings shown on the screen is stable, and press the "CAL"
(SELECT1) key. 4. Confirm that the NO calibration is properly completed, and press the "END"
(SELECT2) key. The instrument goes back to the MENU mode.
5. Disconnect the gas cylinder from the calibration gas inlet, and close the gas inlet by the attached rubber cap.
6. Press the "EXIT" (SELECT2}" key. The instrument goes back to the STANDBY mode.
------------• The NO sensor.ls consumables. Warranty perlod for the NO sensor is one year (at 20.9 %vol 0 2,
25°C, 50% as relative humidity) after delivery In case that it is supplied by HORIBA. If the sample gas contains the corrosive gas or poinsoning substance, It Is possible that the sensor is in poor condition in a short time. The sensor'should be replaced when alarms (NO and !) appear on the bottom right-hand comer of the gas calibration screen.
• The gas calibration Is required at least once per day before measurements. • During the zero calibration sequence, ambient air is automatically introduced Into the instrument. • For CO, CO2 and HC calibration, gas cylinders that contain one or plural of these components are
also available. • It is required to supply the gas at pressure of approx. 100 kPa at gas calibration. • If the span calibration can not be completed properly, "I" alarm will be displayed on the screen.
21
,!
3 BASIC OPERATION
3.3 Measurement
• Procedure
Preparation 1. Complete the warm-up and the gas calibration of the instrument. 2. If necessary, change the settings such as date, H/C and O/C ratio, using the data
entry function in the MENU mode. 3. Confirm that clean elements are set in the pre-filter, dust filter and strainer.
Measurement 1. Press the "MEAS" key under the STANDBY mode.
The MEAS screen appears and the zero calibration sequence starts automatically. During the zero calibration, "MEAS" symbol on the screen blinks.
2. Wait until the sequence is completed.
MEAS
co HC COz LAMBDA 1.0P /R HKlH
----- ppmvol ----%vol
(Zero calibration)
MEAS
co HC COz LAMBDA
1.23rr.vol l 234Qppmvo1
12.34~vol ·1,234
(Measurement)
Fig. 23 MEAS screen (MEAS mode)
3. Insert the probe into the tailpipe of a test vehicle, until the probe alarm disappears.
Fig. 24 Measurement
22
3 BASIC OPERATION
4. When a cycle of the measurement is over, pull out the probe from the tailpipe.
5. To finish the measurement, press the "STANDBY" key. The STANDBY screen appears and the line purge for 10 seconds is automatically carried out. During the purge, uSTANDBY" symbol on the screen blinks.
-----------• Automatic zero calibration - Zero calibration sequence is automatically performed every 30 minutes under the MEAS mode. The interval of the automatic zero calibration is · shorter than 30 minutes immediately after warming up. The remaining time to the next zero calibration Is shown on the screen. - If the zero calibration time has come during the sample gas measurement, the remaining time display ("00:00") blinks with a buzzer. For resetting the buzzer, pull out the probe from the tailpipe so that the zero calibration is performed.
!EAS
co HC COz LAMBDA
----~vol
----- PPIIVO I
----,_~ol
Fig. 25 Automatic zero calibration sequence
• Holding function - Pressing the "MEAS" key under the MEAS mode holds the readings for 1 minute. During the holding status, "HOLD" symbol is displayed on the screen and readings are highlighted. The holding status can be cancelled by pressing the "MEAS" key again.
MEAS( lliil!iJ co'- ✓
HC CC1 LAMBDA
Fig. 26 Holding status
23
3 BASIC OPERATION
• Changing displayed Items • Three patterns for displaying the measurement items can be rotated by the cyclic key. (02, NO, RPM, TEMP: optional) .
MEAS
(1
NO RPM TEMP 1. OP/R HIGH
MEAS
co HC COz LAMBDA 1.0P/R HIGH
1234%vol 5234pomvol t
10000 rp01 123ctegC
MEAS HOLD PR I ~T
1_23t01
12340~gmvol 1234'1,vcl
, G02
1_234LAMBDA L OP/R H1GH
Fig. 27 Display patterns in MEAS mode
• Printing the results
09: 59 07-07-2008
12_34i2° 1
5 2 34 ~gmvo 1 , ii#.ir,;\r,;mi1 ,
~~~·,-·•r- ,~1:
1 oooo~~M
• Pressing the arrow {•) key for 1 second enables to print out the measurement data, when an optional printer Is connected to the instrument For detailed Information, refer to" 5.1.1 Printer Output " (page 39).
• Two speed idle test • "Two speed idle test" sequence is also available In the MEXA-584L software, if the instrument Is equipped with an optional tachometer. For detailed Information, refer to " 4.3.4 Two Speed Idle Test (optlonal) " (page 29).
RPM key (SELECT1) can change the rpm meter setting each time SELECT1 is pushed.
~-5 P/R High -,. 1 P/R High -,. 2 P/R High -,. 0.5 P/R STD -,. 1 P/R STD - 2 P/R STD]
• P/R: Pulse per round = The pulse number during one round of engine • High/STD: The sensitivity of rpm meter. High can be tuned by 3 levels (refer to " e
RPM (optional)" (page 38)).
------------LAMBDA <::> AFR select has moved to MENU screen (refer to " 4.3 MENU Mode " (page 28)).
24
3 BASIC OPERATION
3.4 Power Off Perform the following procedure once a day, when finishing measurement.
• Procedure , 1. Complete the measurement, and pull out the probe from the tailpipe.
Introduce a clean air for approx. 30 minutes so that the sampling line is purged.
2. Press the STANDBY key. The STANDBY screen appears and the line purge for 10 seconds is automatically carried
. out. During the purge, "STANDBY" symbol on the screen blinks.
3. Wait until the sequence (for 1 O seconds) is completed, and turn the power switch off.
4. Disconnect the power cable from the AC power sup1Piy. 5. Replace the elements in pre-filter, dust filter and stminer with new ones (refer to
" 6.1.1 Filter Element Check" (page 42)). 6. Put the storage cover on the instrument.
25
! I, '' I)
'·rl ·, JI
4 FUNCTIONS
4 FUNCTIONS
4.1 STANDBY Mode The STANDBY mode is the initial status of the MEXA-584L after warming up. The instrument can go into the MEAS or MENU mode from the STANDBY mode, by pressing the relevant keys. The functions of the keys in the MEAS mode are listed in Table 9.
STAl'tlBY
co HG COz LAMDA
09;59 30-07-2006
1_23•,vo\ 1234Qpprnvol
1234•,vol 1.230
Fig. 28 STANDBY screen
------------When the mode is changed to the STANDBY from the MEAS, the llne purge for 10 seconds Is carried out automatically.
Table 9 Key operations under STANDBY mode
Key Function Remarks
MEAS key Goes into the MEAS mode
Cyclic key Rotates the layout of display
MENU key Goes into the MENU mode
SELECT1 key Changes the setting of tachometer
Arrow (A) key Turns the back light off for saving the power *1
Arrow (•) key for Print out the measurement data 1 second
*1: The backlight can be turned on again by pressing any key.
Screen saver function In the standby mode, if no key on the front panel is used for 30 minutes, the screen display will automatically disappear to protect the screen. Pressing any key will invoke the previous screen.
26
4FUNCTIONS
4.2 MEAS Mode The measurement sequence can start by pressing the "MEAS" key under the STANDBY mode. At the beginning the sequence, the sampling line is purged, and then the zero calibration is carried out. After that, the instrument starts measurement. The functions of the keys in the MEAS mode are listed in Table 10.
Key
MEAS key
STANDBY key
Cyclic key
"RPM" (SELECT1) key
Arrow (A) key
Arrow (•) key for 1 second
MEAS
co HC COi LAMBDA
1,23,.vol 1234Qppmvol
12.34%vol 1.234
Fig. 29. MEAS screen
Table 10 Key operations under MEAS mode
Function
Holds the readings for 1 minute or until the MEAS key is pressed again
Stops measurement and goes back to the STANDBY mode
Rotates the layout of display
Changes the setting of tachometer
Turns the back light off for saving the power
Print out the measurement data
•1: The backlight can be turned on again by pressing any key.
27
Remarks
·1
., ., '!
:i
l:l;il
li I l1
ili l· l·j: ii : 1:11 !
r·i1
-_11·_:i! i ()i
n· 1!· ·n· 11;
'I.'.· 1;1!
It l,i 1•1-;,,'. j,,
I.:, i I 111
i :i I' I ;I I ..
: l I],
4FUNCTIONS
4.3 MENU Mode The MENU screen can be displayed by pressing the "MENU" key under the STANDBY mode or warm-up sequence. The function that can be performed from this screen is as follows:
• Leak check • HC hang-up test • Gas calibration • Two speed idle test (optional) • Data entry
• Date/Time • H/C, O/C ratio • Standard value (idle mode/high idle mode, optional) • Printer (optional) • RPM (optional)
The displayed items can be selected using the arrow (.._ •) keys and the "SELECr (SELECT1) key. If the "EXlr (SELECT2) key is pressed, the instrument goes back to the STANDBY mode.
LAMBDA<=> AFR (cyclic) key Selects LAMBDA display or AFR display each other when it is displayed.
MEN\J \
lf;LEAK CHECK
2 IHC HANGUP TEST I
3 ~AS CALIBRATION
4 ~AfA ENTRV
5 :Two SPEED IDLE TEST
Fig. 30 MENU screen
LAMBDA#AFR
------------Only the leak check function and data entry function can be used under the warm-up sequence.
4.3.1 Leak Check By the leak check function, leakage in the probe or sampling line can be Checked. Refer to
, ,' • 6.1.3 Leak Check" (page 45) for leak check procedure.
r
4.3.2 HC Hang-up Test By the HC hang-up test function, HC hang-up in the probe and sampling line can be checked. Refer to" 6.1.4 HC Hang-up Test" (page 47) for HC hang-up te?t procedure.
28
4FUNCTIONS
4.3.3 Gas Calibration By the gas calibration function, the calibration sequence of sensitivities for CO, HC, CO2, 0 2 and NO can be performed. The sequence consists of several steps for calibrating the measured gas components. The calibration steps for the .o2 and NO are included only when the instrument is equipped with optional sensors for these components. Refer to u 3.2 Gas Calibration " (page 17) for the gas calibration procedure.
4.3.4 Two Speed Idle Test {optional} This function enables to perform the ''two speed idle test", if the instrument is equipped with an optional tachometer.
e Setting Condition
• Procedure 1. Select "TWO SPEED IDLE TEST" on the MENU screen by the arrow(.& •) keys, and
press the "SELECT" (SELECT1) key. The TSI TEST screen appears.
TSI TEST
VEHICLE INFORMATION ENTRY
PLATE ru.tBERc KYOTO 333 RU 11111
MILEAGE (ktn} 123456
.. ----- .. , re;o~GHIJKLMNOPaRsruv;xyz
Of 23456789 ! "#$%& • ()_.,-./ I ',:; <=>?@. BACK NEXT '
Fig. 31 TSI TEST screen (vehicle infonnation)
2. Select a character in the keyboard area by the arrow(.& •) keys, ! ( ()) key and +- (STANDBY) key, and press the "SET" (SELECT1) key. The selected character is set to the cursor position in the data area.
3. When the current item (e.g. "PLATE NUMBER") is finished editing, move the cursor to "NEXT" and press the "SET" (SELECT1) key. Next item (e:g. "MILEAGE") becomes ready to edit.
4. Repeat step 2. and 3. 5. Press the "SAVE" (MENU) key.
The setting is memorized.
29
I ~;
4 FUNCTIONS
6. Press the "NEXT" (SELECT2} key. The screen goes to that for selecting the high idle mode.
TSI TEST
SELECT HIGH IDLE MODE?
Fig. 32 TSI TEST screen (selecting high idle mode)
7. Press the "YES" (SELECT1) key. The screen goes to that for setting th.e range of high idle.
8. Move the cursor by the arrow(•) key, and set the minimum and maximum value by the arrow (.t.) key.
TSI TEST
HIGH IDLE RANGE MAX: 1500 MIN: 2000
Fig. 33 TSI TEST screen (high idle range)
9. Press the "SET" (SELECT1) key. The setting is memorized.
10. Press the "NEXT" (SELECT2) key. The screen goes to next one.
------------• When the test in high Idle mode Is unnecessary, press the "NO" (SELECT2) key in step 7. In this case, step 8. and 9. will be skipped.
• Settings In these screens are held even after the instrument is turned off.
30
e Check Sequence Before Test
• Procedure ---~ 1. Confirm that the LEAK CHECK screen is displayed.
4 FUNCTIONS
2. Perform the leak check sequence, referring to " 6.1.3 Leak Check" (page 45).
LEAK CHECK
CLOSE PROBE INLET
Fig. 34 LEAK CHECK screen
3. Confirm that the HC HANGUP TEST screen is displayed. 4. Perform the HC hang up test, referring to " 6.1.4 HC Hang-up Test" (page 47).
PULL THE PROBE OUT OF TAILPIPE
HC . 1 00 pprnvol
Fig. 35 HC HANGUP TEST screen
31
I
4 FUNCTIONS
e Two Speed Idle Test
• Procedure 1. Insert the probe into the tailpipe of a test vehicle until the probe alarm disappears. 2. Confirm that the TSI TEST screen for high idle mode is displayed.
TSI TEST
HIGH IDLE MODE CO 1.23 ~vol He 9999 oomvol CO2 12.34 lvol LAMIDA 1.234
02 12.34 ivoi NO 1234 Pl>PIVOI Rf'M 2340 tom TEMP 123 dei;C
MAINTAIN - I y
Fig. 36 TSI TEST screen (high idle mode test)
3. Drive the test vehicle so that the engine speed comes into the proper range. 4. Keep the above driving condition until the readings become highlighted. 5. Make the engine speed lower than the minimum limit.
The instrument memorizes the last results, and the screen for idle mode automatically appears.
TSI TEST
VLEMOOE CO 1.23 l!vol 02 12.34 l!vol HC 9999 ppmvo\ NO 1234 ppmvol CO2 12.34 %vol · RPM 700 rpm LAMBDA 1.234 TEMP 123 degC
Fig. 37 TSI TEST screen (idle mode test)
6. Keep the idle driving condition until the readings become highlighted.
32
4FUNCTIONS
7. Press the "SET" (SELECT1) key. The instrument memorizes th.e last results, and the screen for test results appears.
TSI TEST
HIGH OLE CO 1.23 llvol HC 9999 ppmso! CO2 12.34 %vol LAMBDA 1.234 02 1234Jvol NO 1234 ppmvol RPM 700 rpm TEMP 123 degC
IOLE ,.REl;IJLTS 1.23 ~vol ' PASS ' 9999 JlllmVol._ - - .., 12.34 %vol 1.234 12.34 ,vol 1234 ppmvol 1234 rpm 123 deec
Fig. 38 TSI TEST screen (test result)
8. Confirm the test result displayed on the screen. If it is unacceptable, repeat from step 1. by pressing the "RETRY" (SELECT1) key.
9. Press the "EXIT" (SELECT2) key. The instrument goes back to the MENU screen.
------------If "NO" is selected In step 7. of" e Setting Condition" (page 29), high idle mode (step 2. to 5. of "Two Speed Idle Test") will be skipped. ·
33
--,-.
·: I
'
;• :I
!'! t [l Ii
I!
4FUNCTIONS
4.3.5 Data Entry Function The data entry function is used for parameter setting. The items can be selected by the arrow (.A. •) keys and the "SELECT' (SELECT1) key. If the "EXIT' (SELECT2) key is pressed, the instrument goes back to the MENU screen.
e Date/Time
D4TA ENTRY I \
1 \)ATE/TIME
2 ~IC, 0/C
ti ~T AND ARD V ALIJE (IDLE) I
4 ST ANDAR!l VAWE (HIGH IDLE) I
\ 5 l'RINTER
'°s1
PRMZERO
Fig. 39 DATA ENTRY screen
This function enables to set the date and time used in the instrument.
Fig. 40 DATE/TIME screen
• Procedure 1. Select "DATEfTIME" on the DATA ENTRY screen, and press the "SELECT"
(SELECT1) key. The DATEfTIME screen appears.
2. Move the cursor by the arrow(•) key, and change the set value by the arrow (A) key.
3. Press the "SET" (SELECT1) key. The setting is memorized.
4. Press the "EXIT" (SELECT2) key. The instrument goes back to the DATA ENTRY screen.
-----------Settings in this screen are held even after the Instrument Is turned off.
34
i: .. :
4FUNCTIONS
• H/C and O/C This function enables to set the H/C and O/C ratio in fuel for the air-to-fuel ratio (AFR) or the excess ratio of air (LAMBDA) calculation. ·
H/C. 0/C
,, - ... H/C: ,'(i.40\
I I
o;c: \ o.oo,' .. .,.
Fig. 41 H/C, O/C screen
• Procedure 1. Select "H/C, O/C" on the DATA ENTRY screen, and press the "SELECT" (SELECT1)
key. The H/C, O/C screen appears.
2. Move the cursor by the arrow(•) key, and change the set value by the arrow (A) key.
3. Press the "SET' (SELECT1) key. The setting is memorized.
4. Press the "EXIT" (SELECT2) key. The instrument goes back to the DATA ENTRY screen.
------------• Desirable values of H/C and DIC depend on engine fuels. Typical values for gasoline engine are 1.85 for H/C, 0.00 for 0/C.
• Settings in this screen are held even after the instrument is turned off.
35
j:
if. ,· \:,'
'.\
•'Ii
4FUNCTIONS
e Standard Value (optional) This function enables to set the criteria used in the two speed idle test (optional) or the version with the optional printer. The procedure for the two speed idle test is descried in "4.3.4 Two Speed Idle Test (optional)" (page 29).
ST ANDARO VALUE
CO: ,((.40 --...... , HC: / 00200 ', ,,,,,,,~•,."1";,-1
LAMBDA 0.970-1.030 1
NO: ',0500 ?J1~ .. ... ._ ____ EXIT •
Fig. 42 STANDARD VALUE screen
• Procedure 1. Select "STANDARD VALUE (IDLE}" or "STANDARD VALUE (HIGH IDLE)" on the
DATA ENTRY screen, and press the "SELECT" (SELECT1) key. The STANDARD VALUE screen appears.
2. Move the cursor by the arrow (•) key, and change the set value by the arrow (A) key.
3. Press the "SET" (SELECT1) key. The setting is memorized.
4. Press the "EXIT" (SELECT2) key. The instrument goes back to the DATA ENTRY screen.
------------• The judgment of passed/failed in the two speed Idle test will be performed for the components
which have set values other than zero in this screen. • If the optional printer is connected, it printes out whether the measured values have passed the
standard values. • Settings in this screen are held even after the instrument is turned off.
36
4FUNCTIONS
e Printer (optional) This function enables to set the information about test station (i.e., the address , the company name, the telephone number, and the certifier's name or the code number) that will be printed out with test results.
PRINTER 09:59 30-07-2006
ADDRESS: IIIYANOHIGASHHJHO ii
NAME ICHIRO HORIBA TEL: 075-000-0000 CERTIF; ABCOEFG
,l~o;;r;~N~;s~u:w;yz, I 0123456789 ! "#$~& • ()00-./ \
'..: :.;<~>?@_ BACK NEXT 1
Fig. 43 PRINTER screen
• Procedure 1. Select "PRINTER" on the DATA ENTRY screen, and press the "SELECT" (SELECT1)
key. The PRINTER screen appears.
2. Select a character in the keyboard area by the arrow (A •) keys, ! ( C:)) key and +- (STANDBY) key, and press the "SET" (SELECT1) key. The selected character is set to the cursor position in the data area.
3. When the current item (e.g. "ADDRESS") is finished editing, move the cursor to "NEXT" and press the "SET" (SELECT1) key. Next item (e.g. "NAME") becomes ready to edit.
4. Repeat step 2. and 3. 5. Press the "SAVE" (MENU) key.
The setting is memorized.
6. Press the "EXIT" (SELECT2) key. The instrument goes back to the DATA ENTRY screen.
------------• The entered character can be deleted by selecting "BACK" in the keyboard area. • Settings in this screen are held even after the Instrument is turned off.
37
:i 1:
': i ,; !
':
' \ i
4 FUNCTIONS
e RPM (optional) This function enables to set the conditions for optional tachometer and oil temperature sensor.
• HIGH LEVEL: Tachometer sensor has two sensitivity settings. (STD - HIGH. Refer to Page 24.) The high sensitivity setting can be tuned 3 levels (HIGH, MID, LOW) at this screen. "Low" is able to measure the most low sensitivity signal.
• TEMP: Sensitivity constant of the oil temperature sensor Use the default setting "TEMP:167."
RFM 09:59 07-07-2008 -.. HIGH LEV
1;:: -
I (HIG~ 1 I
TEMP !, 167 , \ (/5V) ,'
' .... - ,.
Fig. 44 RPM screen
• Procedure 1. Select "RPM" on the DATA ENTRY screen, and press the "SELECT" (SELECT1) key.
The RPM screen appears.
2. Move the cursor by the arrow (•) key, and change the set value by the arrow (A) key.
3. Press the "SET" (SELECT1) key. The setting is memorized.
4. Press the "EXIT" (SELECT2) key. The instrument goes back to the DATA ENTRY screen.
------------• Settings in this screen are held even after the Instrument is turned off. • When the cable of the tachometer is disconnected, confirm the number of engine cycle again.
38
5 SIGNAL INPUT/OUTPUT
5 SIGNAL INPUT/OUTPUT
5.1 External Output The product is equipped with printer output and digital input/output as a standard specification. Analog output is optional.
------------For the printer, use the specified cable provided by HORIBA as an option. General cables on the market are not available.
5.1.1 Printer Output Connecting an optional printer (CBM-910!I or equivalent serial printer) to the MEXA-584L using the exclusive printer cable (optional) enables to print out the measurement data in STANDBY, MEAS or TWO SPEED IDLE TEST mode.
e Settings for Printer The settings for the printer are listed below. For detailed information, refer to the operation manual for the printer.
Table 11 Setting of printer
Item Setting
Communication speed 9600 bps
Data length 8 bit
Parity None
e How to Print Out Connect the printer, and press the arrow(•) keys for 1 second. The measurement data will be print out.
MEAS
1.23 ~~al
9999 ~~mv~ 12.34 ~~~
1.23 LAMEDA
09:59 30-07-2006
1 2.34 ~;al
5234 :imval
10000 ;% 123 ~~~
Fig. 45 Print out
39
---,·-·: _,.--- . - --·-· ·-- -- -- --- ·--
, I ! I
5 SIGNAL INPUT/OUTPUT
5.1.2 Digital Input/Output Connecting the main unit with the computer using a RS-232C cable enables to load the data into the computer.
Communication mode
Communication protocol:
Transmitting mode: Transmission rate: Data length:
Stop bit: Parity:
half-duplex operation Asynchronous mode 9600 bps (RS-232C) 8 bit 1 bit none
5.1.3 Analog Output (optional) The exclusive analog output board (optional) and the analog cable {optional) enable the output of measurement data in analog signal (0 V to 1 V, 8 channels) as an optional function. Contact the sales distributor of your area.
e Settings for Analog Output
Table 12 Analog output (optional)
Channel Item Channel Item
1 HC concentration 5 AFR/LAMBDA
2 CO concentration 6 NO concentration
3 CO2 concentration 7 RPM (Engine speed)
4 0 2 concentration 8 TEMP (Oil temperature)
·• Pin Table The pin numbers of the connector are listed below.
Table 13 Analog output line
Connector Pin Line Description Remarks
1 CHi 0 V to 1 V D-SUB 9 pin, female
2 CH3 0Vto1V
3 CH5 0Vto1V
4 CH7 0Vto 1 V ANALOG
5 COM Ground connector
6 CH2 0Vto1V
7 CH4 0Vto1V
8 CH6 0Vto1V
9 CH8 0Vto1V
40
6 MAINTENANCE
6 MAINTENANCE This chapter describes the maintenance items and procedures for the MEXA-584L.
6.1 Periodical Maintenance
Table 14 Periodical maintenance
Item Parts/Units Frequency Required
Reference tools/parts
Replacement of Pre-filter, Daily, Dust filter, or when It becomes Elements 6.1.1
filter elements Strainer dirty
Probe, Check of probe, Sampling tube,
Weekly - 6.1.2 tubes and pump Exhaust line,
Pump
Leak check -- Daily, when starting Probe cap 6.1.3
operation
HC hang-up test - Daily, when starting - 6.1.4 operation
Check of Daily,
ventilation filter - or when it becomes - 6.1.5 dirty
41
6 MAINTENANCE
6.1.1
•
Filter Element Check Check the strainer and the pre-filter once a day when starting the operation, and replace if dirty. For the dust filter, replace when the HORIBA logo mark on the surface is hard to be recognized. Replacement is also required when the filter alarm occurs during measurements. After replacing, always perform a leak check.
Table 15 Filters in sampling line
Names Elements Remarks
PIN 904 7000100 Oil catcher type Pre-filter
PIN 9058000400 P-cocktype
Dust filter PIN 9053001000
Strainer P/N 9025000200
Pre-filter
Fig. 46 Filters in sampling line
-----------The filter element should generally be replaced once approximately 50 measurements for 4-cycle engine vehicles, or once approximately 30 measurements for 2-cycle or special typed engine vehicles (under the basic condition where each measurement should last for 1 minute). However, the actual replacement period depends on the maintenance conditions or the manufactured date of the automotive .
Pre-filter
• Procedure 1. Open the holder cap and take out the old element. 2. For oil catcher type:
Insert a new element into the holder in the arrow direction, with filter seals on each side. For P-cock type: Put a new element to the holder cap.
Pre-filter
Oil catcher type P-cock type
42
3. Tighten the holder cap as it was.
e Dust Filter
• Procedure
Probe
:+- Filter element
~ j Holder
Hddecoap/ r,-~ Filter seal .,,)"
Sampling tube
Fig. 47 Replacement of pre-filter element
1. Open the filter cap and take out the old element.
6 MAINTENANCE
2. Put a new element on the holder with an 0-ring so that the HORIBA logotype faces upward.
3. Put the packing on the element with the wavy surface upside. 4. Tighten the filter cap ·until it can be visually checked that the entire 0-ring has
changed in color when its contact part is rounded.
Fig. 48 Replacement of dust filter element
e Strainer
• Procedure 1. Pull out the holder from the strainer unit and take out the old element. 2. Insert a new element into the holder in the arrow direction.
3. Attach the strainer as it was.
Holder Packing
"-. J (ip]m), Filter element
Fig. 49 Replacement of strainer element
43
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6 MAINTENANCE
6.1.2 Check of Probe, Tubes and Pump The following item should be checked weekly.
Table 16 Check point in sampling line
Parts Check items Counteractions
against problems
Probe Free from any clogs Clean up inside.
Free from any cracks and pinholes Replace with a new probe.
Sampling tube Free from heavy contamination Replace with new tube.
Free from any leakage Confirm the connection.
Without back pressure caused by Clean up inside, or change the
Exhaust tube Inside clogs or bending c,f tube connection way.
Connection to an adequ,;ta place --
Pump Free from abnormal noise Contact the sales distributor of your area.
44
6.1.3 Leak Check Leak check is useful to detect a possible gas leak in the flow path. Perform the following procedure once a day, when starting the operation .
. • Procedure
6 MAINTENANCE
1. If the instrument is not in the STANDBY mode, press the "STANDBY" key and wait until the purge (for 10 seconds) Is completed.
2. Press the MENU key. The MENU screen appears.
3. Move the cursor to "LEAK CHECK" using the arrow (.A •) keys, and press the "SELECT" (SELECT1) key. The LEAK CHECK screen appears.
CLOSE PROBE INLET
Fig. 50 LEAK CHECK screen (start)
4. Close the probe inlet using the leak check cap.
~("~
Fig. 51 Closing probe inlet
5. Press the "START" (SELECT1) key. The leak check sequence (for approx. 15 seconds) starts.
LEAK CHECK LEAK CHECK
Count down
PUMP ON
TEST IN PROGRESS TEST IN PROGRESS
Fig. 52 LEAK CHECK screen (checking)
45
6 MAINTENANCE
6. Confirm the check result displayed on the LEAK CHECK screen. Hit says "CHECK FLOW LINE", check the leakage in sampling line and restart the check by pressing the "RETRY" (SELECT1) key.
LEAK ~ECK LEAK CHECK
PASSED CHECK FLOW LINE 4
Fig. 53 LEAK CHECK screen (result)
7. Press the "EXIT" (SELECT2) key. The instrument goes back to the MENU screen.
8. Take out the leak check cap from the probe.
------------------• For the reliable measurement, the leak check sequence should result in "PASSED" status. If the sequence Is Interrupted by pressing "EXIT" key in "CHECK FLOW LINE" status, the "LEAK" error symbol is displayed.
• If there is any leakage of the specified level or higher, the screen shows the message "CHECK FLOW LINE" and the counted-down value. A larger number means a larger amount of the leakage.
• The sequence of the leak check Is as follows: 0 seconds to 10 seconds: Pump ON (making the sampling line vacuum) 10 seconds to 15 seconds: Pump OFF (monitoring the pressure change)
15 seconds: Display the check result
• When the leak check results in "CHECK FLOW LINE", check the possible leakage position (Fig. 54). After then, retry the .sequence:
Strainer unit: Dust filter unit Set the packing correctly. I Set the packing correctly.
'\.. Set the 0-ring correctly. ':lit Seal up the filter unit completely.
Drain separator: . ..,.,., Set the 0-ring correctly. :-;.; Pre-filter unit:
Set the packing correctly.
Sampling tube: Replace If broken.
Fig. 54 Possible leakage position
46
6 MAINTENANCE
6.1.4 HC Hang-up Test The HC hang-up test is useful to check the adsorbed HC level in the flow path. Perform the following procedure once a day, when starting the operation.
• Procedure 1. If the instrument is not in the STANDBY mode, press the "STANDBY" key and wait
until the purge (for 10 seconds) is completed. 2. Press the "MENU" key.
The MENU screen appears.
3. Move the cursor to "HC HANGUP TEST" using the arrow (A •) keys, and press the "SELECT" (SELECT1) key. The HC HANGUP TEST screen appears.
HC HA~UP TEST
PULL THE PROBE OUT OF TAILPIPE
HC 100 ppm vol
Fig. 55 HC HANGUP TEST screen (start)
4. Pull out the probe from the tailpipe of a test vehicle.
Fig. 56 Pulling out the probe
5. Press "START" (SELECT1) key. The HC hang,up test sequence (for 40 seconds) starts.
HG HANGUP TEST HC HANGUP TEST DB:59 30-07-2006
ZERO CALIBRATION TEST IN PROGRESS
HC 1 00 ppmvol HG 1 00 ppmvol
Fig. 57 HC HANGUP TEST screen (checking)
47
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6 MAINTENANCE
6.1.5
6. Confirm the check result ("PASSED"/"FAILED") displayed on the screen.
HC HANGUP Tl:ST
PASSED
HC 10 ppmvol
Fig. 58 HC HANGUP TEST screen (result)
7. Press the "EXIT" (SELECT2) key. The instrument goes back to the MENU screen.
------------• If the HC concentration at the hang-up check is over 20 ppm, "FAJ LED" message will be shown on the screen. Take remedies below.
To purge the line by clean air, perform the measurement without Inserting the probe into the tailpipe (more than 5 minutes).
• If the concentration should not decrease to below 20 ppm, replace the pre-fllter and dust filter.
• Replace the sampling tube, If the concentration stlll does not change. When these procedures still should not work for obtaining the concentration below 20 ppm, contact the sales distributor of your area.
• The sequence of the HC hang-up check is as follows: 0 seconds to 30 seconds: Zero calibration sequence 30 seconds to 40 seconds: Gas sampling
40 seconds: Display the check result
Check of Ventilation Filter Check the ventilation filter once a day when starting the operation, and eliminate dusts using a vacuum cleaner if filter mesh is blocked.
48
6 MAINTENANCE
6.2 Replacing the 0 2 sensor and the NO sensor When the alarms appear on the gas calibration screen, replace the sensors.
Screw +~
• Screw
Fig. 59 Replacing the sensors
1. Loosen two screws and remove the sensor cover.
2. Disconnect the connectors from the sensors.
Connector
Oz sensor
3. Replace the sensor and use the reverse steps to install a new one.
------------• Hold the root of the sensor as much as possible. • The optional sensors (02 sensor and NO sensor) are consumables. Warranty period for the
optional sensors is one year (at 20.9 %vol 0 2, 25°C, 50% as relative humidity) after delivery in case that they are supplied by HORIBA. If the sample gas contains the corrosive gas or poinsoning substance, it is possible that the sensor is in poor condition in a short time.
49
I.
6 MAINTENANCE
6.3 Trouble Shooting Alarms and typical problems of the MEXA-584L are listed below. In case that the problem can not be solved, contact the sales distributor of your area.
Table 17 Trouble shooting
Status Meaning Cause Remedy Reference
Power cable is not Connect the power cable to a 2.3.3
' connected properly. proper power source. No power -
Fuse in power line is Contact the sales distributor broken. of your area.
No output on the -- Back light is turned off. Turn on the back light by
1.3 LCD arrow key.
"?" sign Reading of relevant item Concentration or input -exceeds full scale. value is too high. (This is not abnormal status.)
•A" sign Reading of relevant item Concentration or input Wait until the readings is increasing drastically. value is changing. become stable.
.. .,, .. sign. Reading of relevant item Concentration or input Wait until the readings is decreasing drastically. value is changing become stable.
Sensitivity alarm
[M] Signal level from sensor There are some problems Contact the sales distributor is too low. in the instrument. of your area.
Probe alarm The purge sequence is in -
~~ Readings of CO2 is less progress. (This is not abnormal status.)
than 5 %vol. The probe is not inserted Insert the probe into the into the exhaust pipe. exhaust tube properly.
Some of the filters in Replace the filter elements. 6.1.1 Filter alarm
Pressure in sampling sampling line are clogged.
CID line is too low. Measuring gas flow Check and clean the fiow stopped. path.
Standard gas is not Confirm that the gas
introduced properly. supplying pressure is more than 100 kPa.
"l"alarm Gas calibration is failed. Setting of span gas Confirm the span gas
concentration is incorrect. concentration, and perform 3.2 gas calibration again.
Zero revel is not calibrated Retry the gas calibration. 3.2
correctly.
,· Hang-up over 20 ppmC Stop the measurement, and
"HANG" alarm Hang-up check results in
occurs in probe or Purge the sampling line, or
6.1.4 ''failed"
sampling line. replace the filters and sampling tube.
Leak check results in Leakage occurs in probe Stop the measurement, and
"LEAK" error confirm the connection of 6.1.3 "failed" or sampling line.
pipings.
Problem occurs in the Replace the sensor.
Input value from the tachometer. "RPM' error
tachometer is improper. Communication error Confirm the connection to occurs. the sensor.
50
6 MAINTENANCE
Status Meaning Cause Remedy
Problem occurs in oil Replace the sensor. Input value from the temperature sensor.
·TEMP" error temperature sensor is improper. Communication error Confirm the connection to
occurs. the sensor.
The internal battery for Contact the sales distributor
Date/time is wrong - back up has run out of the of your area.
life.
6.4 Consumable Parts List
Table 18 Consumable parts
Units Parts P/N Remarks
Probe with pre-filter 9053009600 * Probe assembly
Probe cap for leak check 9053004300 *
Element 9047000100 20 pcs./set, oil catcher type
Pre-filter Element 9058000400 12 pc, P-cock type
Filter seal 9053001100 ·10 pcs./set •
Sampling tube Tube 9022008600 5 m*
Separator unit 9053003900 Drain separator
O-ring 9053004400 . Element 9053001000 20 pcs./set
Dust filter O-ring 9053004200 ,.
Packing 9053004600 ,.
Holder Strainer
9053002600 *
Element 9025000200 40 pcs./set
Element set 9053000900 . 20 pcs./set,
Filters oil catchr type
Element set 9053002900 20 pcs./set, P-cocktype
When there is any leakage after checking possible leakage position (page 46), replace consumable parts with new one.
51
Reference
" ,,;
:·:
7 REFERENCE
7 REFERENCE
7 .1 Specifications
7.1.1 System Outline
Model MEXA-584L
• ISO3930/OIML R99(2000) Class O 1
Conformed standards • CE • FCC • Certified by the Japanese Ministry of Transport
Application Exhaust gases from gasoline vehicle (two-wheel or four-wheel vehicle), LPG vehicle (four-~heel vehicle)
• CO, HC, CO2: non-dispersive infrared (NDIR)
Principle • Air-to-fuel ratio (AFR), Excess air ratio (A-, lambda):
carbon balance method, or Brettshneider method {with 0 2 measurement}'2
Measured components (standard):
• CO: 0.00 %vol to 10.00 %vol
• HC: 0 ppmvol to 10000 ppmvol, or O ppmvol to 20000 ppmvol •3
(as hexane equivalent value)
• CO2: 0.00 %vol to 20.00 %vol
• AFR: 10.0 to 30.0
• LAMBDA: 0.000 to 9.999 Measured/displayed
External input components (optional): components
•Of 0.00 %vol to 25.00 %vol
• NO: 0 ppmvol to 5000 ppmvol
• Engine speed (RPM):
0 rpm to 9990 rpm (Guaranteed range for linearity is 200 rpm to 6000 rpm)
• Oil temperature (TEMP):
0°C to 150°C
• CO: 0.01 %vol
• HC •2: 1 ppmvol (within the range of O ppmvol to 2000 ppmvol), 10 ppmvol (within the range of 2000 ppmvol to 10000 ppmvol)
• CO2: 0.02 %vol
• AFR: 0.1 Display resolution
• LAMBDA: 0.001
• 02: 0.01 %vol
• NO: 1 ppmvol
• RPM: 10rpm*4
• TEMP: 1°c
Monitor display LCD (black and white, 320 x 240 dot)
Input/outputs • Digital input/output: RS-232C (standard), RS-485 (option) ·o
• Printer: RS-232C
52
7.1..2
*1: The following functions required by the ISO 3930/OIML R99 standard are intentionally not equipped considering the practical operation by users.
7 REFERENCE
• The instrument is not able to perform the measurement if the value at a leak check and/or HC hang-up test exceeds the limit value.
• The instrument stops measurement when the pressure in sample gas line is too low (filter alarm).
When such error or alarm is displayed, refer to• 6.3 Trouble Shooting • (page 50) and start measurements after solvlng problems. ·
*2: Air-to-fuel ration (AFR) and excess air ratio (1) are calculated by the carbon balance method in standard configuration. In case that an optional o2 sensor is connected, the Brettshneider equation Is also available. Specify the eguation to be used when you order.
*3: For optional range for HC, 20000 ppmvol, display resolution is 2 ppmvol within the range of 0 ppm to 4000 ppm, and 20 ppmvol within the range of 4000 ppmvol to 20000 ppmvol.
*4: Display resolution of RPM is "1 rpm" as for the units which are delivered for India.
*5: Contact HORIBA for quotation on RS-485 connection (optional). For connection an external PC with a communication software which supports USB port, use a RS232C/USB converter on the market.
Configurations/Conditions
Connection of sample Dedicated flexible probe is attached
gas
Sample gas flow rate Approx. 4 Umin
Sample gas pressure From 0.0 kPa to 1,0 kPa
Dedicated cylinder Calibration gas • Mixed gas of CO, C3H8 and CO2
• NO (for the instrument with NO analyzer {optional))
• Ambient temperature: 0°c to 45°c
Environment for 5°C to 40°C (for OIML confomnity)
operation • Humidity: below 90% as relative humidity
• Ambient pressure: 80 kPa to 106 kPa (-300 m to 2100 mas altitude)
Environment for • Ambient temperature: -30°C to 60°C
storage • Humidity: below 90% as relative humidity, without water condensation
Power supply •1 100 V to 240 V AC, 50 Hz to 60Hz, single phase
Power capacity Approx. 90 VA at stable state
Dimensions 260 (W) >< 357 {D) >< 157 (H) mm (without optional units)
Mass Approx. 4 kg (without optional units)
*1: For using the analyzer with a DC power source, prepare a DC/AC inverter on the market.
53
1:
n 7REFERENCE
.:i
7.1.3 Performance
CO, HC, CO2: Within 15 s, as Td + T 95, when switching zero gas and span gas
Response speed 01
•2 02: Within 15 s, as Td + T 95,
when switching air to zero gas
NO: Within 40 s, as T d + T 95,
when switching zero gas and span gas
CO: Within 0.03 %vol, or within 3% of reading (whichever is large)
HG: Within 10 ppmvol, or within 5% of reading (whichever is large)
CO2 (0.00 %vol to 8.00 %vol): Within 0.3 %vol, or within 5% of reading (whichever is large)
(8.01 %vol to 15.00 %vol): Within 0.4 %vol
(15.01 %vol to 16.00%vol): Within 0.6 %vol Linearity •3
(16.01 %vol to 20.00¾vol): Within 4% of reading
Oz: Within 0.1 %vol, or within 3% of reading (whichever is large)
NO" (O ppmvol to 4000 ppmvol): Within 25 ppmvol, or within 4% of reading (whichever is large)
(4001 ppmvol to 5000 ppmvol): Within 8% of reading
RPM (200 rpm to 6000 rpm): Within ±10 rpm
TEMP: Within ±2°C
CO: Within 0.01 %vol, or within 1.7% of reading (whichever is large)
Repeatability •1,4 HC: Within 3.3 ppmvol, or within 1.7% of reading (whichever is large)
CO2: Within 0.17 %vol, or within 1.7% of reading (whichever is large)
Warm-uptime 5 minutes
CO: Within 0.03 %vol, or within 5% of reading (whichever is large)
Warm-up condition °1 ·5 HG: Within 10 ppmvol, or within 5% of reading (whichever is large)
COz: Within 0.4 %vol
CO: Within 0.03 %vol, or within 5% of reading (whichever is large)
Drift 01
•6 HG: Within 10 ppmvol, or within 5% of reading (whichever is large)
CO2: Within 0.4 %vol
Test gas
co C3Hs c~ H2O 20°c ±2°C
6%vol 4000 ppmvol 16 %vol saturation
Interference effect co Within Within Within -0.02 %vol 0.02 %vol 0.02 %vol
HC Within Within Within
5 ppmvol - 5ppmvo! 5 ppmvol
CO2 Within Wrthin Within
0.25 %vol 0.25 %vol - 0.25 %vol
CO: Within 0.02 %vol, or within 2.5% of reading (whichever is large) Power supply voltage
HC: Within 5 ppmvol, or within 2.5% of reading (whichever is large) fluctuation effect •1,7
COz: Within 0.25 %vol, or within 2.5% of reading (whichever is large)
Propane equivalent Between 0.490 and 0.540
factor of HG readings
54
7.1.4
7REFERENCE
• 1: Span gas for the performance test shall be approx. 0.5 %vol for CO, 200 ppmvol for C3 H8 and 14 %vol for CO2•
•2: When calibration gases are switched at sample inlet with the optional probe attached.
*3: Linearity of gas component is defined as the maximum reading error when below standard gases are used after zero/span calibration. Ambient temperature for linearity test shall be within 20°C ±2°C for gas components, and 25°C :!:2°C for "RPM" and "TEMP". Performance of external input components (02, NO, RPM and TEMP) are guaranteed only for the sensors specified above.
CO: 0.5 %vol, 1 %vol, 3.5 %vol, 5 %vol
CgH8: 200 ppmvol, 600 ppmvol, 2000 ppmvol
CO2: 6 %vol, 10 %vol, 14 %vol
0 2: 0.5 %vol, 10 %vol, 20.9 %vol
NO: 200 ppmvol, 800 ppmvol, 4500 ppmvol
*4: Repeatability is described as the standard deviation of values of 20 repeated measurements.
*5: Maximum reading error directly after completing the warm-up, then two minutes, five minutes and 15 minutes.
*6: Maximum reading error for zero/span gas measurement done at 30-minute Intervals from first 30 minutes after warm-up completion to next four hours.
*7: Maximum reading effect where power fluctuates within the 85% to 110% of specified range (100 Vto 240 V AC).
Options
0 2 sensor-1 Electrochemical cell sensor; Teledyne, model: R22-A
NO sensor •1 Electrochemical cell sensor; City Technology, model: NX1
Thermometer tachometer; Capelec,
Thermometer • Model: CAP8950 tachometer •2 • Connection: to be connected by RS-232C
• Cable length: 0.5/1/3/5/7/10 m (to be specified for order)
Clamp sensor; Tecnotest, Tachometer •2,3 • Model: SL06003
• Cable length: 5.0 m ±0.2 m
Oil temperature sensor Tecnotest;
•3 • Model: SL51080 898 • Cable length: 5.0 m ±0.2 m
Serial printer;
Printer Model: CBM-910l1-24RJ-100A (for 100 V AC) CBM-910ll-24RF-120A (for 120 V AC) CBM-91011-24RF-230A (for 230 V AC)
Printer cable RS-232C cable, 1.5 m
External To be installed in an external PC with Windows XPNista-OS and a RS-232C
communication serial port •4
software
Input/output cable RS-232G cable; 2.5 m, 5 m, 10 m
Analog output board 0Vto1V
Optional probe 6 mm O.D./4 mm I.D, copper pipe
Drain separator Separately attached
55
7 REFERENCE
*1:
*2:
*3:
*4:
Warranty period for the optional sensors (02 sensor and NO sensor specified above) is one year (at 20.9 %vol 0 2, 25°G, 50% as relative humidity} after delivery in case that they are supplied by HORIBA. If the sample gas contains the corrosive gas (F,HF,Cl,HCl,SO2,H2S,etc) or polnsoning substance (Si,Pb,P,Zn,Mn,Ca,etc), it is possible that the sensor is in poor condition in a short time.
ln case of using another tachometer (e.g. AVL DiSpeed490), pinch the detection loop of it by the clamp sensor (SL06003, optional) that is connected to the MEXA-5B4L.
If either sensor and a CAP8950 sensor are connected to the MEXA-584L at the same time, the input signals from the CAPB950 sensor will be adopted.
For using this software in an PC which supports USB ports only, use a USB/RS232C converter on the market.
56
I
l l
7REFERENCE
7.2 . Lambda Formula with 0 2 Measurement For lambda calculation, based upon measurements of CO, CO2, HC and 0 2, the following formula is applied:
Where
[] is the concentration in %vol, for HC only in ppmvol;· K1 Is the conversion factor for HC if expressed in ppmvol n-hexane (C6H14)
equivalent. Its value in this formula is 6 x 10-4;
Hcv Is the atomic ratio of hydrogen to carbon in the fuel; Ocv Is the atomic ratio of oxygen to carbon in the fuel.
57
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