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Milliamp output problems and recommended actions (continued)Table 10-6:
Problem Possible causes Recommended actions
Consistently incorrect
mA measurement
• Loop problem
• Output not trimmed correctly
• Incorrect flow measurement unit config-
ured
• Incorrect process variable configured
• LRV and URV are not set correctly
• Check the mA output trim. See
Section 10.13.
• Verify that the measurement units are con-
figured correctly for your application.
• Verify the process variable assigned to the
mA output.
• Check the settings of Upper Range Value and
Lower Range Value. See Section 10.17.
mA output correct at
lower current, but in-
correct at higher cur-
rent
• mA loop resistance may be set too high • Verify that the mA output load resistance
is below maximum supported load (see
the installation manual for your transmit-
ter).
10.7 Frequency output problems
Frequency output problems and recommended actionsTable 10-7:
Problem Possible causes Recommended actions
No frequency output • Stopped totalizer
• Process condition below cutoff
• Fault condition if fault action is set to in-
ternal zero or downscale
• Slug flow
• Flow in reverse direction from config-
ured flow direction parameter
• Bad frequency receiving device
• Output level not compatible with receiv-
ing device
• Bad output circuit
• Incorrect internal/external power con-
figuration
• Incorrect pulse width configuration
• Output not powered
• Wiring problem
• Verify that the process conditions are below
the low-flow cutoff. Reconfigure the low-flow
cutoff if necessary.
• Check the Fault Action settings. See
Section 10.18.
• Verify that the totalizers are not stopped. A
stopped totalizer will cause the frequency
output to be locked.
• Check for slug flow. See Section 10.25.
• Check flow direction. See Section 10.23.
• Verify that the receiving device, and the wir-
ing between the transmitter and the receiv-
ing device.
• Verify that the channel is wired and config-
ured as a frequency output.
• Verify the power configuration for the fre-
quency output (internal vs. external).
• Check the pulse width. See Section 10.20.
• Perform a loop test. See Section 10.12.
Consistently incorrect
frequency measure-
ment
• Output not scaled correctly
• Incorrect flow measurement unit config-
ured
• Check the frequency output scaling. See
Section 10.21.
• Verify that the measurement units are con-
figured correctly for your application.
Erratic frequency out-
put
• Radio frequency interference (RFI) from
environment
• Check for radio frequency interference. See
Section 10.19.
Troubleshooting
Configuration and Use Manual 191