Instruction manual

64 RFT9739 Field-Mount Transmitter Instruction Manual
Troubleshooting
continued
Follow these general guidelines when troubleshooting a Micro Motion
flowmeter:
• Before beginning the diagnostic process, become familiar with this
instruction manual and with the instruction manual for the sensor.
• While troubleshooting a problem, leave the sensor in place, if possible.
Problems often result from the specific environment in which the
sensor operates.
• Check all signals under both flow and no-flow conditions. This
procedure will minimize the possibility of overlooking some causes or
symptoms.
7.2 Transmitter diagnostic
tools
In some situations, troubleshooting requires use of the transmitter's
diagnostic tools, which include the diagnostic LED, diagnostic
messages, and fault output levels. The diagnostic LED and
communicator hookup loops are shown in
Figure 7-1
.
Diagnostic LED
Table 7-1
describes the transmitter operating conditions indicated by the
diagnostic LED.
Table 7-1.
Conditions indicated by
diagnostic LED
Figure 7-1.
Diagnostic LED and
communicator loops
Diagnostic LED does this: Condition
Blinks ON once per second
(25% ON, 75% OFF)
Normal operation
Remains ON continuously Startup and initialization, zero in progress
Blinks ON three times, then OFF
for 1 second
Communication configuration mode
(switch 10 in ON position)
Blinks OFF once per second
(75% ON, 25% OFF)
Slug flow (density below or above user-
defined limits)
Blinks ON 4 times per second Fault condition
Diagnostic LED
Communicator hookup loops