20
Deadband (DB Control) adjustment
The deadband control adjusts the point at which a tripped alarm
resets. This point will be above the setpoint for a low type alarm or
below for a high type. The procedure for adjusting the DB control is as
follows:
1. Adjust the SET control
2.
Set the deadband to maximum by turning the DB control fully
clockwise.
3.
Trigger the alarm by setting the input signal to ‘full scale’ (for a high
type alarm) or ‘zero’ (for a low type alarm).
4. Set the input to the level at which the alarm should reset.
5
. Decrease the deadband (turn control anticlockwise) until the LED
extinguishes.
6. Check that the setpoint and deadband are set correctly.
I
nternal settings (Alarm type and coil energisation)
To change the alarm type or coil energisation:
1. Remove the left hand side plate.
2. S
et the links according to the diagram (right).
3. Replace the side plate.
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