Emerson Rosemount 3051S Series Reference Manual page 41

Reference Manual
00809-0100-4801, Rev FA
October 2010
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. To zero the 3051S, first close the block valve on
the low pressure (downstream) side of the
transmitter.
NOTE
Do not open the low side equalize valve before the high side equalize valve. Doing so will overpressure the
transmitter.
2. Open the equalize valve on the high pressure
(upstream) side of the transmitter.
Rosemount 3051S Series
H
Test
(Plugged)
Equalize
(closed)
Isolate
(open)
Process Drain Vent
(closed)
H
Test
(Plugged)
Equalize
(closed)
Isolate
(open)
Process Drain Vent
(closed)
H
Test
(Plugged)
Equalize
(open)
Isolate
(open)
Process Drain Vent
(closed)
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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