Milliamp output problems and recommended actions
(continued)
Table 10-5:
Problem
Possible causes
Recommended actions
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 the settings of
Upper Range Value
and
Lower Range Value
•
Check the mA output trim. See
.
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
.
•
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
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 the maximum supported load
(see the installation manual for your trans-
mitter).
10.13
Discrete output problems
Problem
Possible causes
Recommended actions
No discrete output
•
Output not powered
•
Wiring problem
•
Circuit failure
•
Verify that the output loop is powered ex-
ternally.
•
Check the power supply and power supply
wiring. See
.
•
Verify the output wiring.
•
Contact Micro Motion.
Loop test failed
•
Output not powered
•
Power supply problem
•
Wiring problem
•
Circuit failure
•
Circuit failure
•
Verify that the output loop is powered ex-
ternally.
•
Check the power supply and power supply
wiring. See
.
•
Verify the output wiring.
•
Contact Micro Motion.
Discrete output read-
ings reversed
•
Wiring problem
•
Configuration does not match wiring
•
Verify the output wiring.
•
Ensure that
Discrete Output Polarity
is set cor-
rectly.
Troubleshooting
156
Micro Motion
®
Compact Density Meters (CDM)
Summary of Contents for CDM100M
Page 8: ...Getting Started 2 Micro Motion Compact Density Meters CDM ...
Page 12: ...Before you begin 6 Micro Motion Compact Density Meters CDM ...
Page 20: ...Configuration and commissioning 14 Micro Motion Compact Density Meters CDM ...
Page 26: ...Introduction to configuration and commissioning 20 Micro Motion Compact Density Meters CDM ...
Page 110: ...Integrate the meter with the control system 104 Micro Motion Compact Density Meters CDM ...
Page 116: ...Operations maintenance and troubleshooting 110 Micro Motion Compact Density Meters CDM ...
Page 124: ...Transmitter operation 118 Micro Motion Compact Density Meters CDM ...
Page 194: ...Using the transmitter display 188 Micro Motion Compact Density Meters CDM ...
Page 208: ...Using ProLink III with the transmitter 202 Micro Motion Compact Density Meters CDM ...