Basic Diagnostic Messages
(continued)
Table 12-1:
Error message
Potential cause
Corrective action
Intermittent diagnostic
Adjust tuning of empty pipe parameters - see
Coil Open Circuit
Improper wiring
Check coil drive wiring and sensor coils.
Perform sensor tests - see
Other manufacturer’s sensor
Change coil current to 75 mA - set calibration num-
bers to 10000550100000030
Perform a universal auto-trim to select the proper
coil current
Electronics board failure
Replace electronics stack
Coil circuit open fuse
Return the unit to the factory for fuse replacement
Auto Zero Failure
Flow is not set to zero
Force flow to zero, perform auto zero trim
Unshielded cable in use
Change wire to shielded cable
Moisture problems
See
Auto-Trim Failure
No flow in pipe while performing Uni-
versal Auto Trim
Establish a known flow rate, and perform universal
auto-trim calibration
Wiring error
Check that wiring matches appropriate wiring dia-
grams - see
Flow rate is changing in pipe while per-
forming Universal Auto-Trim routine
Establish a constant flow rate, and perform univer-
sal auto-trim calibration
Flow rate through sensor is significant-
ly different than value entered during
Universal Auto-Trim routine
Verify flow in sensor and perform universal auto-
trim calibration
Incorrect calibration number entered
into transmitter for Universal Auto-
Trim routine
Replace sensor calibration number with
1000005010000000
Wrong sensor size selected
Correct sensor size setting - see
Sensor failure
Perform sensor tests - see
Electronics Failure
Electronics self check failure
Cycle power to see if diagnostic message clears
Replace Electronics stack
Electronics Temp Fail
Ambient temperature exceeded the
electronics temperature limits
Move transmitter to a location with an ambient
temperature range of -40 to 140 °F (-40 to 60 °C)
Reverse Flow
Electrode or coil wires reverse
Verify wiring between sensor and transmitter
Flow is reverse
Turn ON Reverse Flow Enable to read flow
Sensor installed backwards
Install sensor correctly, or switch either the elec-
trode wires (18 and 19) or the coil wires (1 and 2)
PZR Activated (Positive
Zero Return)
External voltage applied to terminals 5
and 6
Remove voltage to turn PZR off
Pulse Out of Range
The transmitter is trying to generate a
frequency greater than allowed
Standard pulse - increase pulse scaling to prevent
pulse output from exceeding 11,000 Hz
Troubleshooting
Reference manual
157
Summary of Contents for Rosemount 8732EM
Page 2: ......
Page 6: ...Contents iv Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 10: ...Safety messages 4 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 14: ...Introduction 8 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 30: ...Sensor Installation 24 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 92: ...Operation 86 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 158: ...Maintenance 152 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 214: ...Product Certifications 208 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 217: ...Wiring 8732EM using combination cable Figure C 2 Wiring Diagrams Reference manual 211 ...
Page 222: ...Wiring Diagrams 216 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Page 253: ...Implementing a Universal Transmitter Reference manual 247 ...