TB 1-4920-443-35
(5) Obtain and note the appropriate vibration transducer sensitivity for each channel. Nominal sensitivity
values of standard transducers are given in the table 15-2 below. Transducer sensitivity may also be
determined by referring to the calibration card supplied with the transducer. This value will be used in
step 6 below.
Manufacturer
P/N
Nominal Sensitivity
(mV/in/sec)
CEC
4-106-0001
122
CEC
4-106-0002
122
CEC
4-125-0006
105
CEC
4-118-0002
105
CEC
4-128-0001
60.5
CEC
6222-M20
10
CEC
6233
50
(6) Adjust each channel (CHAN 1, etc.) TI CHAN CAL ADJ control to obtain a TI digital indication equal
to the respective channel transducer sensitivity.
(7) Set the TI CHAN 1 FILTER switch to SENS and adjust TI CHAN 1 SENS ADJ control for full scale
digital meter indication.
(8) Set the TI CHAN 1 Meter Amplifier controls as follows:
Table 15-3 TI Channel 1 Meter Amplifier Controls
FILTER switch to
OUT
MODE switch to
VEL
RANGE switch to
5
XDUCER switch to
VEL
OUTPUT switch to
AVG
(9) Repeat steps 4 through 8 for the remaining channels 2, 3, 4 and 5.
16. Digital Bar graph Zero Adjustment
a. Performance Check
(1) Remove 115 V AC supply to CEC 4000-2047 rack. Remove vibration connectors P25 and P91.
Reconnect 115V ac supply voltage to CEC rack.
CAUTION
Always remove 115 V ac power from vibration system prior to connecting or
disconnecting P25 with J25 (charge amp box). This is done by unplugging the
CEC 4000 AC power cord. Failure to remove power may permanently damage the
charge amps.
(2) Connect a jumper wire between TI plug P25 pins C and L (Cable from control cab to engine/Charge
Amp Box).
(3) Verify that TI Channel 1 Bar graph and digital display indications are zero. Adjust Digital Bar graph
Indicator's ZERO control R4 as necessary. Disconnect the jumper wire.
(4) Repeat steps 2 & 3 for TI Channels 2 through 5 using the connector and pins listed in the table 16-1
below.
Channel
Plug
Jumper Pins
1
P25
C, L
2
P25
E, B
3
P25
G, M
4
P91
N, G
5
P91
B, M
