Troubleshooting
Chapter Eight: Maintenance and Troubleshooting
136
Test B: Localizing Malfunctions to the Electronics Unit
1. Disconnect the transducer cable from the 670 instrument and check voltages at the Head
(upper) connector on the Signal Conditioner Board.
Electronics Unit Voltage Check
Connector Pin
Voltage
Function
13
+12 to +13
Transducer electronics supply voltage
14
+12 to +13
System Check command
15
6 Volts RMS
Excitation voltage
Table 38: Electronics Unit Voltage Check
2. Repeat step 5 of Test A at the transducer connection.
The results should be the same.
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