0
•CalibrationandSetup
General
The SET (setpoint) and DB (deadband) adjustments control the
setpoint and hysteresis for each alarm channel. Internal jumpers
control the alarm type and relay coil energisation.
Equipmentrequirements
• Two accurate decade resistance boxes. Note set Resistance box
to the minimum value of R. Resistance box one is adjusted to give
the required difference signal.
• Flat bladed screwdriver (blade width less than .4 mm / 0.1 inch)
Note 1: Resistance box can be replaced by an accurate resistor
equal to the minimum amount of R (the smaller resistor).
Terminalconnectionsforcalibration
Signaltype
Terminal
Input signal
Common
2
Resistance Box 2
3
Resistance Box 1
4
Power supply
Neutral (−)
9
Live (+)
10
Setpoint(SETControl)adjustment
The SET controls for each channel are on the front panel of the
transmitter. For both high and low type alarms you turn the control
clockwise to trip the alarm and anticlockwise to reset it. The procedure
for adjustment is as follows:
1. Connect up the instrument according to the table above.
. Set the inputs to the trip point.
. Turn the SET control anti-clockwise until the LED extinguishes.
4. Slowly turn the SET control clockwise until the LED lights up.
