LabView communication software XEN-5320 - Xensor

LabView communication software XEN-5320 Version 3.0

Xensor Integration bv Smart Sensor Devices

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copyright Xensor Integration 12 September 2016 page 1 of 24

XEN-5320-v3.0 LabView program

USB/WIFI communication software Version 3.0

For read-out of the XEN-5320 v3.0 thermal conductivity sensor electronics via USB or WIFI , a

LabView program is available from Xensor Integration, for Windows 7.

This is a manual describing the installation and operation of this LabView software.

Contents 1 Installation ............................................................................................................. 2

2 Versions ................................................................................................................ 2

3 The Connection Settings Page .............................................................................. 3

4 Settings WIFI Page ................................................................................................ 5

4.1 Settings for the computer and router ............................................................... 6 4.2 Settings for the XEN-5320 devices ................................................................. 6 4.3 General instructions ........................................................................................ 7

5 The Measurement Mode page ............................................................................... 8

6 Set output zero Page ............................................................................................. 9

7 Gain Calibration Page .......................................................................................... 10

8 Custom Curve Page ............................................................................................ 11

9 Vacuum Page ...................................................................................................... 13

10 Change name device ID ...................................................................................... 14

11 Alarm Page .......................................................................................................... 16

12 The Reception History Page ................................................................................ 17

12.1 The displayed data ....................................................................................... 17 12.2 The filed data ................................................................................................ 19

13 The Graphs Page ................................................................................................ 22

14 Communication commands ................................................................................. 23

15 Trouble shooting .................................................................................................. 23

mailto:[email protected]

http://www.xensor.nl/



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1 Installation

To run the LabView software, some programs have to be installed first, incorporated in

the

Installation package labview XEN-5320 v3.0 software:

LVRTE2014_f1Patchstd.exe

NI_VISA_5.2.0-runtime.exe

atmel_devices_cdc.inf

XEN-5320-v3.0.exe (and 2 supporting files)

The first two programs have to be installed, and the computer has to be restarted. The

third program is the driver for the USB port, and has to be installed via the configuration

screen of the computer. This is done as follows:

First plug in the XEN-5320 device to a USB port of the computer.

Then in the configuration screen go to the device manager and update the driver of

the XEN-5320 device. During installation Windows will give the following warning:

“Windows can’t verify the publisher of this driver software”. Press “install the driver

anyway” to continue the installation. This driver will make a virtual COM port for

each connected XEN-5320 device.

Then the Polling program will run.

2 Versions

The previous versions of the LabView software were version 1.4 for firmware versions

1.4; version 2.0 for firmware version 2.0.

Currently the valid LabView version is 3.0 for XEN-5320 firmware version 3.0.





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3 The Connection Settings Page

When the Polling program opens, the Connection Settings page comes up

automatically, see Fig. 1.

In the Connection Settings page, the file path for filing the measurement data has to be

given.

Then, 1 or more COM ports have to be chosen to select the device to be recorded

when using the USB connection, or an IP address has to be chosen if the WIFI

connection is used.

WIFI and USB can be used intermixed.

By clicking the pull-down arrow at the right of the IP address or COM port selector, a

choice is given of available IP addresses or COM ports, and also a refresh command

becomes available to refresh the available COM ports. When using different IP

addresses than the one available in the list, it is also possible to type in a different IP

address manually. By pressing the button Fill in standard IP addresses, the standard IP

addresses for all 25 devices are filled in automatically, which can be convenient when

using a lot of devices by WIFI. The device ID field is updated only when the WIFI/USB

selection, IP address or COM port is changed. The button Refresh Device ID can be

used to update the device ID fields.

All ports are read out in parallel.

The Enable button should be activated (indicated by the green light in the button) to

actually measure the device to its left.

The Start button at the bottom of the Settings page (and all other pages) starts the

measurements, indicated by a green Running light.

The Stop button stops the measurements, this can take up to several seconds.

The Quit button exits the program when not running, the X at the top right of the screen

exits anyway.

The Delay window allows to slow up the measurements if they go to rapid. The Delay

is in seconds.

In the Select directory for saving measurement data window the file name for

storing the data shown the Reception History can be given by the user. Each

measurement is immediately stored in the file, there is no need for any further action to

save data. A file for each sensor is made. For the first measurement of the day, a new

file is created. Subsequent measurements on the same day are appended to the

existing file.





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Figure 1: The Connection Settings page

The Warning and Alarm lights will light up at the appropriate sensor if a warning or alarm has been issued. The codes are listed on the Reception history page of the sensor in question, and the code will also be written into the file of that sensor. See the Par. on Alarm Page data for the codes, and consult the data sheet for back ground information. A general Warning and Alarm light is at the bottom of all pages. This page indicates for which sensor(s) the warning or alarm is given.





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4 Settings WIFI Page

For the WIFI communication (802.11.b/g) to work properly, some settings must be

made in the computer, the router and in the XEN-5320 devices. The page that can be

used to make changes in the settings of the XEN-5320 WIFI module is shown in Fig. 2.

Be sure that no measurement is running.

Figure 2: Settings WIFI page.





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4.1 Settings for the computer and router

The settings for the computer can be altered using the network center of the

configuration screen, adapter settings.

The settings for the router can be changed via the webpage of the router. See the

instruction of your router.

Below the required settings are shown.

IP adress computer must be 192.168.1.2

Subnetmasker computer must be 255.255.255.0

IPadress router (gateway) must be 192.168.1.1

DHCP of the router must be turned off

Router network name must be: XENSOR-5320

Router network password must be: xen5320v1

Router security settings must be: WPA-PSK [TKIP]

Turn off the Internet Protocol version TCP/IPv6 protocol

4.2 Settings for the XEN-5320 devices

To change the settings of the WIFI module of the XEN-5320, connect the XEN-5320 to

the computer via USB and make sure the following settings are chosen. These settings

can be altered using the LabView program, WIFI page. See the instructions below.

Note that the settings only will have effect after the WIFI module has been turned off.

Set wifi module to the correct settings after (software) reset:

set wlan rate 9

set ip a 192.168.1.? (? = number)

set ip dhcp 0

set ip gateway 192.168.1.1

set ip host 192.168.1.2

set sys printlvl 0

set wlan auth 3

set wlan join 1

set wlan phrase xen5320v1

set wlan ssid XENSOR-5320

save

exit





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4.3 General instructions

- Make sure no measurements are running (Running light must be off)

- Select the COM port from the device that needs adjustment

- The device ID is shown

- Press the Enter settings menu button

- "Enter code" is displayed in the Received from WIFI module window

- The microcontroller from the device is now in WIFI programming mode

- Press the Enter WIFI module command mode button to bring the WIFI module in

command mode

- Now "CMD" is displayed in the Received from WIFI module window

- It is now possible to send commands directly to the WIFI module

- When finished always enter the command save to store the settings in the wifi module

- Press the Done! button to bring back the microcontroller to its normal state

- Do not change the baudrate settings, otherwise it is not possible to communicate with

the WIFI module anymore

- A suggested list with commands is given on the left, a complete list with commands

can be found in the RN-171XV datasheet (see www.microchip.com search for WiFly

RN-171XV)



http://www.microchip.com/



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5 The Measurement Mode page

Fig. 3 shows the measurement mode page. On this page the curve used to calculate

the output signal (% and ppm) is chosen. Also chosen is the measurement speed:

Standard (3.3 Hz) or Fast (≈40 Hz).

If H2 is chosen, a look-up table will be used to convert the change in transfer (the

deviation of the Corrected Transfer from unity) into the output signal.

For HE the 2nd order polynomial curve for helium is used.

For GEN the change in corrected transfer is simply displayed.

For VAC the change is converted to pressure using a formula that describes the output

of the sensor as function of vacuum pressure. The absolute pressure is given in Pa.

When the Custom Curve is chosen, a user provided 23-point look up Table will be used

to calculate the output (%) signal.

Figure 3: The Measurement Mode Page





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Burst and TAU can also be displayed as Measurement Mode, but a separate LabView

program (Burst Tau v3.0) is used to measure in these ultrafast modes (80-750 Hz). If

one of these Modes is displayed, change into one of the other modes first to perform

valid measurements.

Be sure to stop the measurement first, before checking or changing the measurement

mode. If there is still a measurement running (green light below Running), then nothing

will happen.

6 Set output zero Page

The Set output zero Page (see Fig. 4) allows zeroing of the device. The zeroing data

are stored in the memory of the XEN-5320, and zeroing can be carried out when so

desired. Zeroing starts by pushing the Start set output zero button (after stopping the

measurements). The zeroing takes a number of seconds, the busy light is flashing

green and yellow.





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Figure 4: The Start output zero Page, with data of the device before and after zeroing.

7 Gain Calibration Page

The Gain Calibration page allows for calibration of the 100% value for the helium or

hydrogen signal in the helium or hydrogen measurement modes. The measurements

should be stopped.

This action can be performed either via WIFI or USB.

In HE measurement mode, 100% helium should be present around the sensor head, in

H2 mode 100% hydrogen should be present. When the Start gain calibration button

is pushed, the program will perform a measurement, calculate the output and calculate

a gain factor to adjust the output to 100%. If the adjustment that is required is more

than a few percent, the error light will shine and a gain factor of unity is returned (see

Fig. 5).

The gain factor is stored in the EPROM of the XEN-5320.





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Figure 5: The Gain Calibration page.

8 Custom Curve Page

The Custom Curve page allows uploading (and checking by downloading) of a 23-point

look up Table into the XEN-5320. Fig. 6 shows a custom helium curve. The points of

such a curve may be generated, for instance, using EXCEL. The points do not need to

be equidistant. Fig. 7 shows the txt file.





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Figure 6: The Custom Curve page. Figure 7: The helium.txt

custom curve text file.





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9 Vacuum Page

The Vacuum page allows uploading (and checking by downloading) of 5 parameters

determining a look up Table for vacuum measurement, see Fig. 8. See the data sheet

XEN-TCG3880 for detailed explanation of these curves. Fig. 9 shows the txt file.

Figure 8: The Vacuum page.





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Figure 9: The air-vac.txt vacuum text file.

10 Change name device ID

The Change name device ID page allows changing the device ID of the XEN-5320.

The device ID can store a min of 1 and a max of 10 characters and can be used to give

each device a customized name, see Fig. 10. The device ID is stored into the XEN-

5320 hardware.

The Device ID can only be changed by USB connection. The Incorrect name light

burns when the field Give new device ID is empty or contains more than 10 characters.

By pressing the button Change device ID (after stopping the measurements) the

contents of the Give new device ID field is transferred to the XEN-5320 hardware.

Once the transfer is complete the new name is read back from the XEN-5320 hardware

and is shown in the New Device ID read from XEN-5320 board field.





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Figure 10: The Change name device ID page, which can be used to change the device ID of the XEN-

5320





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11 Alarm Page

The Alarm page shows the cumulative codes of a selected group of warnings and

errors, calculated by the LabView program, see Fig. 11. The code is stored at each

measurement, and warns if anything is out of the ordinary or even wrong. For each

sensor a light will shine on the Connection Setup Page to indicate for which sensor the

alarm is going off. On the sensor’s Reception History Page, or in the file, the codes can

then be found and checked. The higher the code, the more serious the problem.

Figure 11: The Change name device ID page, which can be used to change the device ID of the XEN-

5320

Consult the data sheet for background information on self diagnosis.





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12 The Reception History Page

12.1 The displayed data

On the Reception history page, the measurement data are shown as numbers, see Fig.

12. There is a Reception history page for each sensor, up to 25 sensors. At the top of

each page, the Sensor IDentification is shown, the Firmware version of the sensor,

the Measurement mode, i.e., the conversion curve used to calculate the output in %.

This can be altered on the Measurement mode page. And finally the Gain is shown,

the gain can be calibrated on the Gain Calibration page. The output values are

multiplied with the gain to get a 100% output when 100% of the second gas type is

present. For instance, for an air-helium curve, gain calibration is performed in 100%

helium. The gain factor is calculated to get the displayed output also to 100%. If the

calculated value deviates too much (more than a few percent), for instance, when a

wrong gas mixture is present, the gain is set to unity instead.

Figure 12: The Reception History Page





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It can be that your computer shows only zeros after the decimal separator, if this

separator is a comma. This separator should be changed into a point(.), and then,

correct trailing digits will appear. This can be done in the Country & Language part of

the configuration screen of your PC.

Explanation of the columns.

Iteration is the number of the measurement, this is counted per device and starts at 0.

The iteration restarts at 0 after a stop and (re)start of the measurements.

Time is the computer time of the measurement. It is given in increments of 10 ms.

However, when importing the data into EXCEL, the time is displayed only in full

seconds, unless the notation is changed into an adjusted notation (go to cell properties,

and use an adjusted notation as u:mm:ss.00).

Output in % is the deviation of the corrected transfer with respect to the calibration

transfer.

In case the Measurement mode is H2 for hydrogen, the output is given as % H2

concentration. This mode measures in the electronics’ 50-mV measurement range.

In case the Measurement mode is He for helium, the output is given as %helium. This

mode measures in the electronics’ 50-mV measurement range.

In case the Measurement mode is GEN, a general output is given as % of the

difference between the calibration transfer and the corrected transfer. This mode

measures in the electronics’ 200-mV measurement range.

In case the Measurement mode is VAC, the output is converted into an air vacuum

pressure in Pa. This mode measures in the electronics’ 200-mV measurement range.

Transfer in V/W (output voltage of the thermocouple sensing element divided by the

heater power) is what has been measured.

Pt100 in ºC is the temperature measured with a Pt100 element in the thermal

conductivity sensing-element housing.

Tsens in ºC is the temperature measured with the Sensirion humidity sensor.

RH (Relative Humidity in %) is the RH measured by the Sensirion RH sensor.

AH shows the absolute humidity pressure in kPa. It equals the RH times the saturation

water vapor pressure at Tsens.





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Corr_transfer, the corrected transfer gives the nominal transfer (but not in V/W) as

calculated after correcting for the differences between the temperature and humidity

during calibration and during measurement. The remaining difference from unity is then

ascribed to the parameter to be measured.

Utp is the output voltage of the thermopile measuring the temperature elevation of the

heater element.

Ih in mA is the current through the heater element on the sensing element’s

membrane.

Uh in mV is the voltage across the heater element on the sensing element’s

membrane.

Ph in mW, the multiplication of Ih and Uh is the power dissipated in the membrane.

The Thermocouple voltage Utp divided by the Heater Power Ph gives the measured

Transfer.

USyst in V gives the power supply voltage of the XEN-5320 after stabilization. This

should normally read as about 3.3 V.

UBat in V gives the LI-ion battery voltage. It will be 4.2 V when the sensor is connected

through USB. Then the system is running on USB power and the Li-ion battery is

recharging.

If the battery is full, the yellow LED next to the USB connector will light. If the battery is

charging, the red LED next to the yellow LED will light up.

The green LED next to the red LED will flash if the sensor is operational.

If the system is operating on the battery, the Ubat will be in the range of 4.1~3.6 V.

Bat (%) shows the battery charge in %

Alarm shows a code for a selected number of warnings and errors. Se the Alarm

Chap. for the codes.

12.2 The filed data

All data are stored in a text file, with a name starting with the date (yyyy-mm-dd),

followed by the device name. If no file for the current date exists, a new file will be

made. Otherwise, the data are appended to the existing file.





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For each device and day, a new file is made. The file starts with some general data on

the device, with subsequently all the measurement data. If the measurement is stopped

and then started again, the header data are repeated.

The header resembles the data shown in Fig. 13 below (with some long numbers

reduced in length):

Figure 13: The Filed data.

The Device ID is a unique coding for each XEN-5320.

The Factory Device ID is the name given to the device by the manufacturer.

The Firmware is the version of the microcontroller program.

The Measurement mode is explained above.

The Speed is the measurement speed.

The Sensitivity is a nominal multiplication factor to convert a change in transfer into a change in measurement parameter. For low hydrogen concentrations the factor of -1.93 %/% that is shown is an indication that a 1% increase in hydrogen concentration leads to a 1.93% decrease in corrected transfer level. For hydrogen a full-range a look-up Table is used.

For He (helium), a polynomial is used, at low helium concentrations the sensitivity is of the order of -1.1 %/%. For Gen (General) firmware unity sensitivity is used. For VAC the output is converted into a vacuum pressure in Pa. TC Transfer is the correction factor in the firmware for temperature changes. AH1-AH2-AH3 are the coefficients of the 3rd power polynomial curve in the firmware to correct for changes in (absolute) humidity. Y_AH_Cal (-) is the correction factor used for humidity during calibration. TF_Cal (V/W) is the transfer during calibration. Temp_Cal (ºC) is the temperature during calibration. The Gain is the factor by which the output is multiplied to get a 100% output value for 100% second gas. These three factors give the XEN-5320 measurement data during calibration. It is possible to update these calibration data by performing a new calibration using the Calibration Page. These data are used, together with subsequent temperature and humidity measurement to first calculate the corrected transfer at the subsequent measurement. Then difference between the corrected and actually measured transfer is used to calculate the output signal, either using the Sensitivity, or with a more complicated formula or look-up Table. Then the same data are given as displayed in the reception page.





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Each measurement data line occupies about 0.1 kB of file size. Thus, a file with 500 000 measurements is about 50 MB large.





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13 The Graphs Page

On the Graphs Page, one of all the parameters that are shown in the reception can be

displayed against the iteration number. Time cannot be displayed.

There is one display per sensor, 5 sensors per sub-page. There are 5 sub-pages to

display all 25 sensors.

Alternatively, up to 5 parameters of sensor #1 can be displayed on one page.

Fig. 14. shows several data of sensor 01BC01: output (%), Utp (mV), Corr transfer (-),

Tsens ( ºC) and AH (kPa), for some 670 measurements. The data refresh time is about

25 ms for the Fast measurement speed used here. The graph shows the effect of

breathing in and out over the XEN-5320. An average Absolute Humidity (AH) of about

4 kPa is attained, where the Maximum Saturation pressure of water vapor at 37 ºC is 6

kPa.

Figure 14: The Graphs Page





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14 Communication commands

For those who want to organize their own communication between XEN-5320 and

control device (computer, lap top, smart phone?), the communication commands can

be found in the XEN-5320 Version 3.0 data sheet.

15 Trouble shooting

The measurement data show a lot of zero’s

instead of real data.

It can be that your computer shows only zeros

after the decimal separator, if this separator is a

comma. This separator should be changed into a

point(.), and then, correct trailing digits will appear.

This can be done in the Country & Language part

of the configuration screen of your PC.

The time data are wrong when importing the

measurement file into EXCEL.

Be sure to define the time data column as

u:mm:ss.00 in the cell properties, adjusted

format.

When importing the measurement data into

EXCEL they are of an incorrect magnitude.

This is a point/comma settings result. When

importing the data in EXCEL, use the advanced

settings to exchange the designation of a point

and a comma.

Communication of the LabView program with the

WIFI router is not working.

Be sure to have the settings of the computer and

the router exactly as explained in the WIFI

chapter.

The communication with the WIFI devices is not

working.

Be sure to have the settings of the devices

corresponding to the settings of the router.

Commands in the Calibration and Settings Page

do not work.

Stop the measurement before performing these

actions.

For any further questions, problems or remarks, please contact Xensor Integration or

search the website for updated information:

Tel +31 15 257 80 40

Email [email protected]

Web www.xensor.nl

Conditions: Use of sensors for industrial applications is subjected to patent rights. Xensor Integration assumes no liability

arising from violation of these rights

Warranty: Xensor Integration warrants its products against defects in materials and workmanship for 12 months from date

of shipment. Products not subject to misuse will be replaced or repaired. The foregoing is in lieu of all other







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expressed or implied warranties. Xensor Integration reserves the right to make changes to any product herein

and assumes no liability arising out of the application or use of any product or circuit described or referenced

herein.



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LabView communication software XEN-5320 - Xensor