TB 1-4920-443-35
NOTE
Debug vibration system if 60 Hz noise is present.
(5) After zeroing indicators, go back to step 4 through 8 on performance check 15 and recheck alignment
and SENS settings.
(6) Connect the CEC 2700 Precision Signal Source to connector P25, pins C (+) and L (-). Use J2 (pins
A and B) of CEC 2700 for AC millivolts signal. Switch CEC 2700 to AVG output. Assure that TI power
is disabled before connecting or disconnecting P25 with J25.
(7) Set the CEC 2700 to a constant output frequency of 100 Hz while changing the output millivolt level to
the values listed below. At each output level, verify that the TI Vibration Meter channel 1 indicator and
AEDATS reads within the tolerance limits listed in the table below.
Table 16-2 TI Vibration Meter Indications
TI Vibration Meter
CH 1
CH 2
CH 3
CH 4
CH 5
(Hz)
Output (AVG)
Limits (in/sec)
Reading Reading Reading
Reading
Reading
100
116.5
0.9 to 1.1
100
233.0
1.9 to 2.1
100
350.0
2.9 to 3.1
100
466.0
3.9 to 4.1
100
583.0
4.9 to 5.1
Table 16-3 AEDATS Indications
AEDATS
CH 1
CH 2
CH 3
CH 4
CH 5
(Hz)
Output (AVG)
Limits (in/sec) Reading Reading
Reading
Reading
Reading
100
116.5
0.9 to 1.1
100
233.0
1.9 to 2.1
100
350.0
2.9 to 3.1
100
466.0
3.9 to 4.1
100
583.0
4.9 to 5.1
(8) Repeat steps 8 & 9 for channels 2 through 5, using the plug and pin connections listed in table 16-4
below.
Channel
Plug
Plug Pins
2
P25
E, B
3
P25
G, M
4
P91
N, G
5
P91
B, M
(9) Remove 115 V AC supply to CEC 4000-2047 rack by unplugging AC power cord. Reinstall
connectors P25 and P91. Reconnect 115V ac supply voltage to CEC rack.
17. Digital Vibration Measurement Systems Using Accelerometers
a. Performance Check (Amplifier Response Velocity Mode)
CAUTION
Do not activate CONTINUITY (CONT) switch. Damage to charge amplifier may result.
(1) Set the TI controls as follows for channels 1, 2, and 3:
