3300/16 Dual Vibration Monitor Operation Manual
32
16.2 Test Upper OK Limit
1. 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 4 on the next page).
• Verify that the OK Relay
changes state (de-
energized). Note: All other
channels in the rack must
be OK or bypassed in order
for the relay to change
state.
2. Decrease the power supply
voltage (less negative) to -9
Vdc and verify that the OK
LED comes back on after
the 30-second Timed
OK/Channel Defeat delay,
and the OK Relay
energizes. Press the
RESET switch on the
System Monitor to reset the
flashing OK LED.
16.3 Test Lower OK
Limit
1. Gradually decrease the
power supply voltage for
channel A (less negative)
until the channel A OK LED goes off (lower limit). Verify that the lower OK limit is within
the lower OK voltage range (reference Table 4).
2. Verify that the OK Relay de-energizes.
3. Increase the power supply voltage for channel A to -9 Vdc. Press the RESET switch on
the System Monitor to reset the flashing OK LED.
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