•
Ramp Differential Expansion Monitor Maintenance
1 12 1 Te s t OK Limits
Figure 9
84414-01
1. Disconnect COM and IN wiring from the
channel A terminals on the Signal Input Relay
Module.
2. Connect the multimeter and the power supply.
3. Adjust the power supply voltage for -9 Vdc.
4. Verify that the channel A OK LED is on.
5. Increase the power supply voltage (more
negative) until the OK LED goes off (upper limit).
Verify that the upper OK limit is within the upper
OK voltage range (reference Table 8).
A \ CAUTION
Test will exceed alarm setpoint
levels causing alarms to
activate. This could result in
relay contact to change state.
See Danger Bypass section 10.
A \ WARNING
High Voltage present. Could
cause shock, bums or death.
Do not touch exposed wires or
terminals.
m • • . .
D I F F E R E N T I A L
E X P A N S I O N t i O N
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