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Case Expansion Monitor Maintenance
121 Te s t OK Limits
MULTI METER
/ M I \
A
VDT
1 0 0 0
SHAFT CENTER L I N E
\
SLIDING
FOOT
t=1
11:3
I[:1
1V3
[)
1E1
IC 3
SIGNAL
INPUT RELAY
MODULE
0 0 0
POWER SUPPLY
ummosimi
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 Zero Vdc.
4. Verify that the Channel A OK LED is on.
5. Increase the power supply voltage in the negative
direction until the OK LED goes off (upper limit). Verify
that the upper OK limit is within the limits specified in
Table 5.
6. Verify that the O K relay changes state (de-
energized). Note : all other channels in the rack must
be OK or bypassed in order for the relay to change
states.
84418-01
CAUTION
Tests will exceed alarm set point
levels causing alarms to activate.
This could result in relay contact to
change state. See Danger Bypass
section 10.
WARNING
High Voltage present
Could cause shock, bums
or death.
Do Not touch exposed
wires or terminals.
rl 8 - -
19
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