Emerson Rosemount 2051 Wireless Series Reference Manual page 165

Section 3: Installation
June 2012
Five-valve Natural Gas configurations shown:
In normal operation, the two block
valves between the process and
instrument ports will be open, and the
equalizing valves will be closed.
1.
Note
Do not open the low side equalize valve before the high side equalize valve. Doing so will
overpressure the transmitter.
2.
42
To zero the 3051, first close
the block valve on the low
pressure (downstream) side
of the transmitter.
Open the equalize valve on
the high pressure (upstream)
side of the transmitter.
H
Test
(Plugged)
Equalize
(closed)
Isolate
(open)
Process Drain
Vent
H
Test
(Plugged)
Equalize
(closed)
Isolate
(open)
Process Drain
Vent
H
Test
(Plugged)
Equalize
(open)
Isolate
(open)
Drain Vent
Process
(closed)
Reference Manual
00809-0100-4100, Rev AA
L
Test
(Plugged)
Equalize
(closed)
Isolate
(open)
Process
L
Test
(Plugged)
Equalize
(closed)
Isolate
(closed)
Process
L
Test
(Plugged)
Equalize
(closed)
Isolate
(closed)
Process
Installation