Instruction manual

66 RFT9739 Field-Mount Transmitter Instruction Manual
Troubleshooting
continued
7.3 Interrogation with a HART
®
device
Connect a HART Communicator to the communicator hookup loops
indicated in
Figure 7-1
, or use the ProLink or AMS programs to
communicate with the transmitter.
• If the HART Communicator does not offer RFT9739 "Dev v4" as a
device description, the communicator memory module needs to be
upgraded.
• Use ProLink software version 2.3 or higher.
• Contact the Micro Motion Customer Service Department to upgrade
your HART Communicator or ProLink program:
-
In the U.S.A., phone [phone], 24 hours
-
Outside the U.S.A., phone [phone], 24 hours
-
In Europe, phone [phone]
-
In Asia, phone [phone]
Figure 7-2
(next page) explains how to connect a HART Communicator,
the ProLink PC Interface adaptor, or the AMS serial modem to the
RFT9739. For more information, see the HART Communicator or
ProLink software instruction manual, or AMS on-line help.
Fault detection indicates an interruption in the functional integrity of the
sensor and the electronics, including the sensor pickoff coils, drive coil,
and RTD. Faults, such as a short or an open circuit, are detected by the
HART device.
The transmitter runs continuous self-diagnostics. If these diagnostics
reveal a failure, the HART device displays an error message. Self-testing
allows the transmitter to check its own circuitry.
The transmitter works with a Micro Motion flow sensor to provide flow
information. Therefore, many of the troubleshooting checks pertain only
to the sensor. However, a HART Communicator, the ProLink program,
and AMS software enable the user to perform other tests:
• Performing an
mA output test
forces the transmitter to produce a user-
specified current output of 0 to 22 mA.
• Performing a
frequency/pulse output test
forces the transmitter
to produce a user-specified frequency output between 0.1 and
15,000 Hz.
• Performing an
mA output trim
allows adjustment of the primary and
secondary mA outputs against a highly accurate external standard
such as a digital multimeter (DMM) or receiving device.
Perform mA trim and/or test procedures, if necessary, as described in
the HART Communicator or ProLink software instruction manuals, or in
AMS on-line help.
• If the transmitter is in security mode 8, mA output test, mA output trim,
and frequency/pulse output test procedures cannot be performed. For
more information, see "Security mode 8," page 6.
• If the transmitter is in fault condition, an mA output test cannot be
performed.
• If the transmitter is not properly connected to a sensor, or if the sensor
is in fault condition, an mA output test cannot be performed.