The calibration of the module allows you to correct long-term drifts in the module, and to optimize precision at ambient temperatures other than 25 ºCelsius. The TSX AEY 414 module is calibrated channel by channel.
The calibration dynamic is limited to 1% of the full scale, as above this level the module considers there to be an acquisition channel anomaly.
Full scale calibration is done on each of the channels and in each of the ranges by placing a calibration source directly on the input terminal block.
Procedure for a Voltage Input
This procedure is performed from the recalibration screen.
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Step
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Action
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1
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Access the calibration adjustment screen
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2
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Select a channel and switch to calibration mode
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3
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Connect a voltage reference to the voltage input to be calibrated, according to the range to be calibrated
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+10.000V +/-0.018% for voltage ranges
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+60.000mV +/-0.028% for thermocouples B, E, J, K, L, N, R, S, T and U and the range 13..63 mV
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+2.500V +/-0.016% for the Pt100, Pt1000 Ni1000 thermowell ranges
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4
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Once the reference has been connected to the voltage input, select the reference value from the drop-down list
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5
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Wait, if necessary, for the reference voltage connected to stabilize, then confirm the selection using the "Confirm" button. The ranges linked to this reference are then calibrated automatically.
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Procedure for Thermowell Current Source
This procedure is performed from the calibration screen
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Step
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Action
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1
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Access the calibration adjustment screen
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2
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Select a channel and switch to calibration mode
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3
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Connect a reference current channel-by-channel in order to calibrate
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4
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Read the value supplied, and give this value in units of x 100 nA
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The calibration value is not acknowledged until it has been saved in the module using the "Save" button.
The "Return to Factory Parameters" button cancels all previous calibrations, and restores the module to its initial calibration (factory settings).
Selecting this button triggers a confirmation message. On the other hand, after confirmation, acknowledgment is immediate and does not need to be saved.
Leaving the screen without saving triggers a message which will remind the user that the save has not been performed. If the user chooses to exit the screen anyway, the new calibration coefficients are lost (the former values are restored).
NOTE:
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For the calibration voltages 10 V and 2.5 V, the expected read value after calibration is 10000 +/-2.
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For 60 mV calibration, the expected read value is 9523 +/-2 (10000 corresponds to the full scale, i.e. 63 mV.)
