GE Bently Nevada 3300/25 Operation Manual page 87

Section 19 - Appendix B–Filter Board Options PWA 79562-01 and PWA 105521-01
Step 5a continued:
For Full Scale Range options 01, 02,
03, 04, 11, 12, 13, 14
For example, if the Full Scale Range
option is 11, set the amplitude to 204
mVpk or 144 mVrms.
6. Verify that the bargraph for channel A reads 65% to 75% of full scale range, with
the following exceptions:
A. The bargraph reading will be lower if you have a High Pass Filter with a corner
frequency below 100 Hz and that channel is measuring velocity (Full Scale Range
options 05, 06, 15, 16, or 17, see
Some typical bargraph readings for this configuration are given below.
Section
High Pass Filter
corner frequency
10 Hz
30 Hz
60 Hz
Step 5b continued:
For Full Scale Range options 05, 06,
15, 16, 17
For example if the Full Scale Range
option is 06 and the corner frequency
is 53 Hz, calculate the amplitude like
this:
Amplitude (mVpk) = (3.25 mVpk/Hz) X
(53 Hz)
or
Amplitude (mVrms)= (2.30 mVrms/Hz)
X (53 Hz)
If the result of this calculation is
greater than 3.5 Vpk or 2.47 Vrms
or if the signal level is too small to
accurately set on the function
generator, use the alternate
procedure in Section 19.16
testing the filter options.
8.2).
Bargraph reading
(% of full scale)
43% to 53%
61% to 71%
64% to 74%
= 172 mVpk
= 122 mVrms
to finish
81