Maintenance Manual

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Every sensor, except the line Voltage and the Current sensor can be calibrated the same way. The Signal
destination, the Unit type, the Unit, the Min and Max value are variables that are set in factory but the calibration
can be made in the field.
There are three ways of calibrating a sensor that can be chosen in the windows below "Sensor value".
-Sensor value: Connect an external measurement tool that is already calibrated (like a Manometer to calibrate a
pressure sensor). Bring the system to calibrate to a low point. While looking at the measurement tool, press the
read button (the button with a circular arrow). The value that was displayed on the measurement tool when the read
button was pressed needs to be enter in the "Low" window below the Desired value. Repeat these steps with a high
value. Then press compute. For the PT1, only a high value is required.
-Theorical voltage: Use a graphic of the theorical sensor's voltage response (usually given in the datasheet of the
sensor). Enter a low point (value, voltage) and a high point. Then press compute.
-Theorical current: Same as the theorical voltage, but with amperes.
For better results, use two points that are far apart, but in the normal range of the sensor.
For the pressure transducer PT1, the low point (zero) is automatically acquired during first power up. It can be re-
acquired by pressing the blue round arrow. The high point needs to be entered in order to calibrate the sensor.