3300/25 Dual Accelerometer Input Monitor Operation Manual
84
5.
Configure the main board as follows to change the Gain Stage back to an
Integrator Stage:
Channel A:
Install
W6A
Remove
W6B,C
Channel B:
Install
W3F
Remove
W3D,E
6.
Choose an integrator test frequency according to the following criteria:
A.
The test frequency must be within the passband of the filter.
B.
The test frequency cannot be below 100 Hz or in the range 280 Hz to 335
Hz.
C.
The test frequency should be at least a decade away from the filter's -3dB
frequency, if possible (i.e., at least ten times the high pass -3dB frequency
or no more than one tenth the low pass -3dB frequency).
If the test frequency is less than a decade away from a filter's -3dB
frequency, the bargraph readings made in step eight may be lower than
specified.
7.
Adjust the function generator frequency to the test frequency. Set the amplitude
for a sine wave signal with a -7.5Vdc offset, using the following equation:
F
×
K
=
Amplitude
where:
K is found in the table below and f is the test frequency (chosen in step six) in
Hertz.
K*
Full Scale Option
mV/Hz (peak)
mV/HZ (RMS)
05 0-1
in/s
06 0-2
in/s
15 0-25
mm/s
16 0-50
mm/s
17 0-100
mm/s
1.46
2.93
1.44
2.89
5.77
1.04
2.07
1.02
2.04
4.08
See
Appendix D, Section 21.4
for derivation of K.
*K as used in this table is 90% of the calculated value.
