
Maintenance
3500/42 Operation and Maintenance
156
Direct
1. Disconnect PWR / B, COM, and SIG / A (PWR, COM / A, and SIG / B for
TMR I/O) field wiring from the channel terminals on the I/O module.
2. Connect test equipment:
For Seismoprobe:
Connect test equipment and run software as described in section 5.1.8.1
(Test Equipment and Software Setup - Velocity), use the setup shown on
page 150 (Seismoprobe Test Setup). If no filtering has been configured,
leave the frequency of the function generator set to 100 Hz. If filtering is
configured, the needed frequency can be calculated from the following
formula:
Frequency = (0.89
×
HPF) + (0.1575
×
LPF)
HPF = High-pass Filter Corner Frequency
LPF = Low-pass Filter Corner Frequency
If no filtering is configured, set the frequency of the function generator to 100
Hz.
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 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 a
LPF of 5,500 Hz.
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.
For Velomitor:
Connect test equipment and run software as described in section 5.1.8.1
(Test Equipment and Software Setup - Velocity), use the setup shown on
page 151 (Velomitor Test Setup, Standard I/O) or page 153 for TMR I/O. If
no filtering has been configured, leave the frequency of the function
generator set to 100 Hz. If filtering is configured, calculate the needed
frequency from the following formula:
Frequency = (0.89
×
HPF) + (0.1575
×
LPF)
HPF = High-pass Filter Corner Frequency
LPF = Low-pass Filter Corner Frequency
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