Configuration and calibration
Issue 5 - June 2005 Page 47 of 64 Pages
To set A1 alarm
1. Turn A1 potentiometer fully clockwise.
2. Adjust VR1 until the voltage across TP1 and TP2 is at the required threshold
(turn VR1 anticlockwise to increase the voltage across TP1 and TP2)
3. Turn A1 pot anticlockwise until the A1 alarm trips
To set A2 alarm
1. Turn A2 potentiometer fully clockwise.
2. Adjust VR1 until voltage across TP1 and TP2 is at the required threshold
3. Turn A2 potentiometer anticlockwise until the A2 alarm trips
To set A3 alarm
1. Turn A3 potentiometer fully clockwise.
2. Adjust VR1 until voltage across TP1 and TP2 is at the required threshold
3. Turn A3 potentiometer anticlockwise until the A3 alarm trips
If an alarm is not required, turn the corresponding potentiometer fully clockwise.
After setting the alarm thresholds, adjust VR1 so that the voltage across TP1 and TP2 is
800 mV ± 20 mV.
Regard-1 SE Ex has a fixed fault alarm threshold at about –5% of the measuring range.
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