56
D.5 Digital Interface Box (DIB)
1. Turn power OFF.
2. Disconnect transducer from DIB.
3. Turn power ON.
4. Check the following voltages on Pin-B (Gnd.) on J2 (6-pin) of the DIB.
Pin A = +12 to +15 Vdc
Pin D = -13.5 to -15 Vdc
Pin F = +11.5 to +12 Vdc
3. If any voltage is missing or is not within specification, send the DIB to the factory for repair. If voltages
are correct go to Step 4.
4. With power on, use an oscilloscope to check the interrogation signal to the transducer on J2 Pin-E on
the DIB. If no signal is present, send the box to the factory for repair. If the signal looks like the exam-
ple below, go to step 5.
Figure D-4
Interrogation Signal
5. Connect oscilloscope to Pin-C on the transducer cable. The return pulse and recirculations should be
present. Go to Step 6 if these signals are present. Return the DIB to the factory for repair if the signals
are not present. Below is an example of a DIB with 4 recirculations.
Volts/div: 1v
Time/div: 5µs (delay mode)
Figure D-4
(4) Recirculation Pulses
IMPORTANT NOTE:
The MTS Customer Service Department
should be consulted before attempting
any repairs in the field. Failure to con-
sult MTS will void the warranty.
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