Table 14-3: Milliamp output problems and recommended actions (continued)
Problem Possible causes Recommended actions
Constant mA output • Incorrect process variable assigned to the
output
• Fault condition exists
• Non-zero HART address (mA Output 1)
• Output is configured for loop test mode
• Verify the output variable assignments.
• View and resolve any existing alert
conditions.
• Check the HART address. If the HART
address is non-zero, you may need to
change the setting of mA Output Action
(Loop Current Mode).
• Check to see if a loop test is in process (the
output is fixed).
• Check HART burst mode configuration.
mA output below
3.6 mA or above
21.0 ma
• Incorrect process variable or units assigned
to output
• Fault condition if Fault Action is set to
Upscale or Downscale
• LRV and URV are not set correctly
• Verify the output variable assignments.
• Verify the measurement units configured
for the output.
• Check the Fault Action settings. See Check
mA Output Fault Action.
• Check the settings of Upper Range Value
and Lower Range Value. See Check Lower
Range Value and Upper Range Value.
• Check the mA output trim. See Trim mA
outputs.
Consistently incorrect
mA measurement
• Loop problem
• Output not trimmed correctly
• Incorrect measurement unit configured for
process variable
• Incorrect process variable configured
• LRV and URV are not set correctly
• Check the mA output trim. See Trim mA
outputs.
• Verify that the measurement units are
configured 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 Check Lower
Range Value and Upper Range Value.
mA output correct at
lower current, but
incorrect at higher
current
• mA loop resistance may be set too high • Verify that the mA Output load resistance
is below the maximum supported load (see
the installation manual for your
transmitter).
Configuration and Use Manual Troubleshooting
MMI-20020954 March 2021
Configuration and Use Manual 137
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