Emerson 3051S Especificações Página 32

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30
Reference Manual
00809-0100-4803, Rev DA
Section 2: Installation
April 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
(closed)
Test
(Plugged)
Test
(Plugged)
Equalize
(closed)
Process
Isolate
(closed)
Isolate
(open)
H
L
1. To zero the 3051S
MultiVariable transmitter,
first close the block valve on
the low pressure
(downstream) side of the
transmitter.
Process
Equalize
(closed)
Drain Vent
(closed)
Test
(Plugged)
Test
(Plugged)
Equalize
(closed)
Process
Isolate
(closed)
Isolate
(open)
H
L
2. After zeroing the Differential
Pressure sensor, close the
equalize valve on the low
pressure (downstream) side
of the transmitter.
Process
Equalize
(open)
Drain Vent
(closed)
2. After zeroing the Differential
Pressure sensor, close the
equalize valve on the low
pressure (downstream) side
of the transmitter.
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