Figure 65: Xrc Board- Analog Input Calibration Points - ABB XSeriesG4 User Manual

Analog input calibration
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The Totalflow XRC comes standard with five analog inputs on the XRC
calibration points). As the user enters calibration, the XRC
The Current Values section will display the current values continuously by checking the Update box. When different analog
inputs are selected, their assigned register numbers are displayed on the top of the screen.
Follow the instructions in the PCCU32 Help files for specific software steps. Generally, the user needs to complete the following
procedures.
Step-by-step instructions
From the Local Connect screen in PCCU32, select Calibrate.
Connect an accurate power source capable of 1 - 5 Volts or 4 – 20 mA to the AI terminals to be calibrated (see Figure
65). Make sure the jumpers on the termination panel are in the 4 – 20 mA position, if a 4 -20 mA source is used. This puts
a 250 Ohm resistor across the terminals to convert the 4 – 20 mA to 1 - 5 Volts.
When calibrating an analog input, select either 3 Point or 5 Point for number of calibration points: 3 Point for low, 50%
and 100% values, and 5 Point for low, 25%, 50%, 75% and 100% values.
In the Current Value box, check Update. This causes the AI to look for its source at the terminals instead of a test value.
Begin the calibration starting with the first selection, Low Calculation Point.
Apply an appropriate input, such as 1 Volt or 4 mA to the AI terminals.
Enter a value (typically zero) representing the Low Cal Point and representing the desired engineering units. Click OK.
NOTE: The current reading value on the pop-up entry screens will be placed in the Reading column and represent
values from the previous calibration. User-entered values will be displayed in the Entry column.
Move to the 100% Calibration Value.
Apply 5 Volts or 20 mA to the AI terminals (depending on jumper setting).
Enter a value representing the full range and representing the desired engineering units. Click OK.
If 3 point calibration was selected, move to the 50% Calibration Value.
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enters the hold mode and displays the current values.
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Figure 65: XRC board- analog input calibration points
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board (see Figure 65: XRC
66
G4
board- analog input