Disassembly Procedures; Removing From Service - Emerson Rosemount 2051 Reference Manual

Reference Manual
00809-0100-4107, Rev BA
LCD
Alert name
screen
Analog ANLOG
Output
SAT
Saturated
6.4

Disassembly procedures

Do not remove the instrument cover in explosive atmospheres when the circuit is live.
6.4.1

Removing from service

Follow these steps:
1.
2.
3.
4.
5.
a.
b. The Rosemount 2051T transmitter is attached to the process by a single hex nut
6.
7.
8.
Troubleshooting
LOI screen Problem
ANALOG
SAT
The analog output is
saturated either high or
low due to the pressure
either above or below
the range values.
Follow all plant safety rules and procedures.
Power down device.
Isolate and vent the process from the transmitter before removing the transmitter from
service.
Remove all electrical leads and disconnect conduit.
Remove the transmitter from the process connection.
The Rosemount 2051C transmitter is attached to the process connection by four bolts
and two cap screws. Remove the bolts and screws and separate the transmitter from
the process connection. Leave the process connection in place and ready for
re-installation. Reference
process connection. Loosen the hex nut to separate the transmitter from the process.
Do not wrench on neck of transmitter. See warning in
page 49.
Do not scratch, puncture, or depress the isolating diaphragms.
Clean isolating diaphragms with a soft rag and a mild cleaning solution, and rinse with
clear water.
For the Rosemount 2051C, whenever you remove the process flange or flange
adapters, visually inspect the PTFE o-rings. Replace the o-rings if they show any signs of
damage, such as nicks or cuts. Undamaged o-rings may be reused.
Recommended action
1. Check the pressure applied to ensure
it is between the 4-20mA points.
2. Check the transmitter pressure
connection to make sure it is not
plugged or isolating diaphragms are
not damaged.
3. Replace the pressure sensor.
Figure 3-4 on page 43 for coplanar flange.
Section 6: Troubleshooting
"Inline process connection" on
April 2013
87