Maintenance
3500/42 Operation and Maintenance
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If a low-pass filter is configured and no high-pass filter is configured, use the
following to determine the HPF to use in the formula:
-
If the units are integrated or rms, use a HPF of 10 Hz. For any other
configuration, use a HPF of 3 Hz.
If a high-pass filter is configured and no low-pass filter is configured, use the
following to determine the LPF to use in the formula:
-
If the configuration is a single channel with no integration, use a LPF
of 30 kHz.
-
If the configuration is a single channel with integration, use a LPF of
14.5 kHz.
-
If the configuration is a dual channel pair, use a LPF of 9.155 kHz.
Set the frequency of the function generator to this new value. The above is done
to obtain a test frequency in the center of the channel frequency range.
3. Adjust the function generator amplitude to produce a reading that is below
the Direct setpoint levels on the Direct bar graph display of the Verification
screen.
4. Press the RESET switch on the Rack Interface Module (RIM). Verify that the
OK LED is on, the bar graph indicator for Direct is green, and the Current
Value field contains no alarm indication.
5. Adjust the function generator amplitude such that the signal just exceeds the
Direct Over Alert/Alarm 1 setpoint level. Wait for 2 or 3 seconds after the
alarm time delay expires and verify that the bar graph indicator for Direct
changes color from green to yellow and the Current Value Field indicates an
Alarm.
6. Press the RESET switch on the Rack Interface Module (RIM). Verify that the
bar graph indicator for Direct remains yellow and that the Current Value Field
still indicates an Alarm.
7. Adjust the function generator amplitude such that the signal just exceeds the
Direct Over Danger/Alarm 2 setpoint level. Wait for 2 or 3 seconds after the
alarm time delay expires and verify that the bar graph indicator for Direct
changes color from yellow to red and that the Current Value Field indicates
an Alarm.
8. Press the RESET switch on the Rack Interface Module (RIM). Verify that the
bar graph indicator for Direct remains red and that the Current Value Field
still indicates an Alarm.
9. Adjust the function generator amplitude such that the signal reads below the
Over Alarm setpoint levels. If the nonlatching option is configured, observe
that the bar graph indicator for Direct changes color to green. The Current
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