Instructions

Appendix B Calibration
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Appendix B Calibration
If the accuracy of the input or output of the module is no longer in accordance with the specification,
it can be calibrated. The module must be connected to the basic device to be calibrated. The
calibration is carried out the same way as with the basic device.
VORSICHT
Ensure reliable power supply of the basic device and modules during the calibration. If
it fails, the calibration should be repeated.
Each analog input has its own calibration coefficients for each sensor type.
Calibration is performed using a reference signal source connected to the device input.
The calibration coefficients are calculated based on the ratio between the current input signal and
the reference signal and stored in non-volatile device memory.
If calculated coefficients go beyond the permissible limits, a message about the error cause will be
displayed.
B.1 Input calibration
To calibrate an input:
1. Connect the reference signal source to the input.
Abb. B.2 Connection of the reference signal source to an input
2. Connect the PR100 programming connector (Fig. 6.3, Pos. 1) to PC over a USB-to-microUSB
connection cable.
3. Switch on the power supply of the device.
4. Start ALP and select the menu item Device > Calibration to start the calibration tool.
5. Select Analog inputs as calibration target.
6. Select the type of input signal and other calibration parameters (Fig. B.3).
Abb. B.3 Parameter configuration