Calibrating the TSX AEY 1614 Module
(Original Document)
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At a Glance
Calibration is performed on channels 0 and 8.
On channel 0, two types of calibration are possible:
On channel 8, only calibration of the measurement string is possible.
Recommen-dations
It is advisable to calibrate the module outside the application. Calibration can be performed with the PLC task linked to the channel, in RUN or STOP modes.
NOTE: In the calibration screen, the values displayed on the left side of the screen (channels 0 and 8) indicate the value measured on the connected voltage reference. The display format in tenths of mV (16000 displayed for 1.6 V) is not intended to monitor the reference precision but simply to indicate the presence of this reference.
Procedure for Recalibrating the Measurement String
The following table shows the procedure for calibrating the measurement string:
Step
Action
1
Access the calibration adjustment screen
2
Double click on channel 0.
Result: The system asks for confirmation ‘Do you wish to switch to recalibration mode?’
3
Reply to this question with Yes.
Result: The recalibration window appears.
4
Connect a voltage reference to the voltage input to be calibrated, according to the range to be calibrated
  • +25.000mV+/-0.039% for the ranges to be calibrated Thermocouples B, R, S, and T
  • +55.000mV+/-0.026% for the ranges to be calibrated Thermocouples U, N, L, and K
  • +80.000mV+/-0.023% for the ranges to be calibrated Thermocouples J and E
  • +166.962mV+/-0.019% for the range Pt100
5
Once the reference has been connected to the voltage input (e.g. 10 V), use the Reference drop-down list box to select this value. Wait, if necessary, for the reference voltage connected to stabilize, then confirm the selection using the OK command button. The ranges linked to this reference (e.g. 10 V and 0..10 V) are then calibrated automatically.
6
Calibrate the module for other ranges, if applicable.
The Return to Factory Settings command button will cancel all previous calibrations, and return the module to the calibration settings configured in the factory.
7
Press the Save command button, in order to recognize and save the new calibration in the module. If you exit the calibration screen without saving, a message is displayed indicating that the new calibration values will be lost .
Calibrating the 1.25 mA Current Source
The current source is used for cold junction compensation. The following table shows the procedure for calibrating the current source:
Step
Action
1
Access the calibration adjustment screen
2
Double click on channel 0.
Result: A question appears ‘Do you wish to switch to recalibration mode?’.
3
Reply to this question with Yes.
Result: The calibration window appears.
4
Using a precision multimeter (0.068% to 1.25mA), measure the current source value given by the channel to be calibrated.
Note this value and convert it into micro-Amps
5
Use the Reference drop-down list box to select Source.
Enter the converted value in the Source field (for example 12501 for 1.2501 mA) then confirm the selection with the OK command button.
6
Press the Save command button, in order to recognize and save the new calibration in the module. If you exit the calibration screen without saving, a message is displayed indicating that the new calibration values will be lost.