Fisher-Rosemount 3095FT, Manual

Page: 99 / 184

Section
5-1
5 Troubleshooting and
Maintenance
This section describes troubleshooting and maintenance tasks
associated with the Model 3095FT. These include Model 3095FT Flow
Transmitter maintenance procedures, field replaceable part
procedures, and Remote Power Supply maintenance procedures.
MAINTENANCE
MODES As described on Page 4-35, the Model 3095FT User Interface Software
allows placing the Model 3095FT into two different maintenance
modes: off-line and on-line. Be sure to return the Model 3095FT to
“On-line Normal Operation” when finished with the maintenance tasks.
Off-line Maintenance
Placing the Model 3095FT into off-line maintenance mode stops all flow
calculations and the logging process. The Model 3095FT considers this
a totalizing event, and generates variable, daily, and event logs.
When Off-line maintenance mode is exited, an event log is created, the
Model 3095FT restarts logging, and all subsequent calculations are
performed using the new values entered during off-line maintenance.
On-line Maintenance When the Model 3095FT is placed into on-line maintenance mode, both
logging and flow calculations continue. During on-line maintenance, the
technician has 3 choices as illustrated in Figure 5-1:
• “Use Recent Averages” uses the most recent process variable
readings and flow averages to calculate and log flow.
• “Use Default Values” uses the process variable values entered in
the PV Default Values screen (See Page 4-30).
• “Use Entered Values” displays a screen for the operator to enter
process variables which will be used during the maintenance
period.
When on-line maintenance mode is exited, the Model 3095FT generates
an event log, and all subsequent calculations are performed using the
new values entered during on-line maintenance.
Use only the procedures and new parts specifically
referenced in this manual. Unauthorized procedures or
parts can affect product performance and the output signal
used to control a process, and may render the instrument
dangerous. Direct any questions concerning these
procedures or parts to Rosemount Inc.