1
14
7
VR1
. . . . . . . .
1. Adjust the SET control
. Set the deadband to maximum by turning the DB control fully
clockwise.
. 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.
. Decrease the deadband (turn control anticlockwise) until the LED
extinguishes.
6. Check that the setpoint and deadband are set correctly.
Internalsettings(Alarmtypeandcoilenergisation)
To change the alarm type or coil energisation:
1. Remove the left hand side plate.
. Set the links according to the diagram (right).
. Replace the side plate.
LeadLengthCompensationAdjustment(factorysetting)
Note: you will require an accurate 100 Ω resistor (in addition to the
requirements above). The procedure for adjusting this control is:
1. Remove the electronics from the housing.
. Connect up the alarm according to the
table above.
. Connect the 100 Ω resistor between
terminal 4 and the simulator Bsense
connection.
4. Set the RTD simulator to 0 °C.
. Adjust VR1 on the personality card until
the voltage across terminals and of
the instrument is twice that across the
resistor.
This completes the adjustment.
