Section 20 - Appendix C–Filter Board Options PWA 148921-01
131
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 Section 3).
Some typical bargraph readings for this configuration are given below.
Step 5a continued:
Step 5b continued:
For Full Scale Range options 01, 02,
03, 04, 11, 12, 13, 14
For Full Scale Range options 05, 06, 15, 16, 17
For example, if the Full Scale Range
option is 11, set the amplitude to
204 mVpk or 144 mVrms.
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)
= 172 mVpk
or
Amplitude (mVrms) =(2.30 mVrms/Hz)X(53 Hz)
= 122 mVrms
If the result of this calculation is greater
than 3.5 Vpk or 2.47 Vrms or too small to set
accurately on the function generator, use
the alternate procedure in
Section 20.13
to
finish testing the filter options.
High Pass Filter
corner frequency
Bargraph reading
(% of full scale)
10 Hz
30 Hz
60 Hz
43% to 53%
61% to 71%
64% to 74%
