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Reference Manual
00809-0100-4444, Rev AC
Section 9: Troubleshooting
January 2015
Troubleshooting
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
• Intrinsically safe pulse - Increase pulse scaling to prevent pulse output
from exceeding 5,500 Hz
• Pulse output is in fixed pulse mode and is trying to generate a
frequency greater than the pulse width can support - see Pulse width
on page 91
• Verify the sensor calibration number and line size are correctly entered
in the electronics
Analog Out of Range
Flow rate is greater than analog
output range
• Reduce flow, adjust URV and LRV values
• Verify the sensor calibration number and line sizes are correctly entered
in the electronics
Flowrate > 43 ft/sec
Flow rate is greater than 43 ft/sec • Lower flow velocity, increase pipe diameter
Improper wiring
• Check coil drive wiring and sensor coils
• Perform sensor tests - see Table 9-8 on page168
Digital Trim Failure
(Cycle power to clear
messages, no changes were
made)
The calibrator (8714B/C/D) is not
connected properly
• Review calibrator connections
Incorrect calibration number entered
into transmitter
• Replace sensor calibration number with 1000015010000000
Calibrator is not set to 30 FPS • Change calibrator setting to 30 FPS
Bad calibrator or calibrator cable •Replace calibrator and/or calibrator cable
Coil Over Current
Improper wiring
• Check coil drive wiring and sensor coils
Perform sensor tests - see Table 9-8 on page 168
Transmitter failure •Replace the electronics stack
Coil Power Limit
Improper wiring • Check coil drive wiring and sensor coils
Perform sensor tests - see Table 9-8 on page 168
Incorrect calibration number
• Verify configured calibration number matches sensor tag
Transmitter connected to other
manufacturer’s sensor
• Change coil current to 75 mA - set calibration number to
10000550100000030
• Perform a universal auto-trim to select the proper coil current
Coil drive frequency set to 37 Hz • Sensor may not be compatible with 37 Hz. Switch coil drive frequency
to 5 Hz.
Sensor failure •Perform sensor tests - see Table 9-8 on page 168
No AO Power
Improper wiring •Check the analog loop wiring - see Wiring the transmitter on page 25
No external loop power
• Verify the analog power switch position (internal/external)
• For externally powered loop, verify power supply requirements - see
Powering the transmitter on page 33
No loop resistance (open loop)
• Install resistance across the analog output terminals
• Disable message using LOI Error Mask parameter
Transmitter failure •Replace the electronics stack
Electrode Saturation
Improper wiring • See Wiring the transmitter on page 25
Improper process reference •See Process reference connection on page 21
Improper earth grounding
• Verify earth ground connections - see Wiring the transmitter on
page 25
Application requires special
transmitter
• Replace transmitter with transmitter that includes special option F0100
Table 9-1. Basic Diagnostic Messages (continued)
Error message Potential cause Corrective action