Maintenance
3500/42 Operation and Maintenance
120
Full-Scale Voltage =
Not 1X Ampl Meter Top Scale
×
Transducer Scale Factor
Note
Use the Transducer Scale Factor displayed in the Scale Factor Box on the
Verification Screen.
Example 1:
Not 1X Ampl Meter Top Scale = 10 mil
Transducer Scale Factor = 200 mV/mil
Full Scale
= (10
×
0.200)
= 2.000 Vpp
For Vrms input:
Vrms = (0.707/2)
×
(Vpp), for a sinewave input
= (0.707/2)
×
(2)
= 0.707 Vrms
Example 2:
Not 1X Ampl Meter Top Scale = 200
µ
m
Transducer Scale Factor = 7,874 mV/mm
= 7.874 mV/
µ
m
Full Scale
= (200
×
0.007874)
= 1.5748 Vpp
For V rms input:
V rms = (0.707/2)
×
(Vpp), for a sinewave input
= (0.707/2)
×
(1.574)
= 0.5566 Vrms
4. Set the Keyphasor multiplier/divider so that the multiply setting is one and the
divide setting is two. Verify that the Not 1X bar graph display and Current
Value Box is reading ±1 % of full scale. If the recorder output is configured,
refer to Section 5.1.10 (Verify Recorder Outputs) for steps to verify the
recorder output.
5. If the reading does not meet specifications, check that the input signal is
correct. If the monitor still does not meet specifications or fails any other part
of this test, go to Section 5.1.11 (If a Channel Fails a Verification Test).
6. Disconnect the test equipment and reconnect the PWR, COM, and SIG field
wiring to the channel terminals on the I/O module. Verify that the OK LED
comes on and the OK relay energizes. Press the RESET switch on the Rack
Interface Module (RIM) to reset the OK LED.
7. Repeat steps 1 through 6 for all configured channels.
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