Emerson Rosemount 2051 Reference Manual page 61

Reference Manual
00809-0100-4107, Rev BA
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.
Hardware Installation
To zero the Rosemount 2051,
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.
Section 3: Hardware Installation
H
Test
(Plugged)
Equalize
(closed)
Isolate
(open)
Process
Drain
Vent
(closed)
H
Test
(Plugged)
Equalize
(closed)
Isolate
(open)
Drain Vent
Process
(closed)
H
Test
(Plugged)
Equalize
(open)
Isolate
(open)
Drain
Process
Vent
(closed)
April 2013
L
Test
(Plugged)
Equalize
(closed)
Isolate
(open)
Process
L
Test (Plugged)
Equalize
(closed)
Isolate
(closed)
Process
L
Test
(Plugged)
Equalize
(closed)
Isolate
(closed)
Process
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