Configuration and calibration
Issue 5 - June 2005 Page 43 of 64 Pages
Using a potentiometer :
• Connect the potentiometer between terminals 8 and 9.
Using a 4-20 mA source loop calibrator
• Connect the loop calibrator between terminals 7 and 8.
The method to set the alarm thresholds is the same for each.
To set A1 alarm
1. Turn A1 potentiometer fully clockwise.
2. Adjust test pot until voltage across TP1 and TP2 is at the required threshold
3. Turn A1 pot anticlockwise until the A1 alarm trips
For the A2 and A3 alarms, repeat the above procedure with the A2 and A3
potentiometers.
• If an alarm is not required, turn the corresponding potentiometer fully clockwise.
• The fault alarm threshold is fixed at 3.2 mA.
Test potentiometer
1200 to 6000 ohms
Test points
TP1 + TP2
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