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Reference Manual
00809-0100-4102, Rev AA
Section 3: Installation
May 2013
Installation
Five-valve Natural Gas configurations shown:
Note
Do not open the low side equalize valve before the high side equalize valve. Doing so will
overpressure the transmitter.
Test
(Plugged)
Test
(Plugged)
Equalize
(closed)
Process
Isolate
(open)
Isolate
(open)
H
L
In normal operation, the two block
valves between the process and
instrument ports will be open, and the
equalizing valves will be closed.
Process
Equalize
(closed)
Drain
Vent
Test
(Plugged)
Test
(Plugged)
Equalize
(closed)
Process
Isolate
(closed)
Isolate
(open)
H
L
1. To zero the 2051, first close
the block valve on the low
pressure (downstream) side
of the transmitter.
Process
Equalize
(closed)
Drain
Vent
Test
(Plugged)
Test
(Plugged)
Equalize
(closed)
Process
Isolate
(closed)
Isolate
(open)
H
L
2. Open the equalize valve on
the high pressure (upstream)
side of the transmitter.
Process
Equalize
(open)
Drain Vent
(closed)