Cameron Barton 752 - Page 25

25
Model 752 and 752A Differential Pressure Transmitters Section 4
Table 4.4—Transmitter Troubleshooting
Problem Possible
Source
Probable Cause Corrective Action
No Output Power
Source
Blown fuse, faulty
component
Replace fuse, repair
power supply
Transmission
Cable
Loose terminal connection Tighten terminal
connection; locate
and replace broken
wire
Receiver
(or load)
Blown fuse, faulty component Replace fuse; repair
or replace receiver
or load
Transmitter Loose terminal, reversed power
connection, faulty component
Tighten terminal,
reverse power con-
nection, return to
factory for repair
Transmitter
"zeros" but
cannot get
full output
Power
Source
Low voltage Repair power
source
Load
Resistance
Resistance too high Replace load resis-
tance or repair as
required
Transmission
Cable
Resistance or length of cable in
excess of
specications
Measure cable loop
resistance and bring
within specications
Electronic
Module
Amplier
Loss of gain Return to factory for
repair.
Out of
Calibration
Electronic Component value shifted Recalibrate or return
to factory for repair
Erratic or
Intermit-
tent
Operation
Terminal
Connections
Loose or dirty Tighten and/or clean
as required
Electronic
Component
Defective component Return to factory for
repair
Strain Gages Physical damage Return to factory for
repair
Excess
Output (will
not "zero")
Transmitter Defective component Return to factory for
repair