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Procedure
1. Set HART Address as appropriate for your HART network.
The default address is 0. This is the recommended value unless the transmitter is in a
multidrop network.
2. Set Loop Current Mode to Enabled.
12.16 Check HART burst mode
HART burst mode can cause the transmitter to output unexpected values. Burst mode is
normally disabled, and should only be enabled if another device on the HART network
requires burst mode communication.
1.
Check to see if burst mode is enabled or disabled.
2. If burst mode is enabled, disable it.
12.17 Check the trimming of the mA output
If the trim values for the mA output are inaccurate, the transmitter will under-compensate
or over-compensate the output.
1. Trim the output, following the standard procedure.
2. If this does not correct the problem, contact Micro Motion.
12.18 Check Lower Range Value and Upper Range
Value
If the process conditions fall below the configured Lower Range Value (LRV) or rise above the
configured Upper Range Value (URV), the transmitter outputs may send unexpected values.
1.
Make a note of your current process conditions.
2. Check the configuration of the LRV and URV.
12.19 Check mA Output Fault Action
mA Output Fault Action controls the behavior of the mA output if the transmitter encounters
an internal fault condition. If the mA output is reporting a constant value below 4 mA or
above 20 mA, the transmitter may be in a fault condition.
1.
Check the status alarms for active fault conditons.
2. If there are active fault conditions, the transmitter is performing correctly. If you
want to change its behavior, consider the following options:
• Change the setting of mA Output Fault Action.
Troubleshooting
236 Micro Motion
®
Model 2700 Transmitters with Analog Outputs