Reference Manual
00809-0100-4801, Rev FA
October 2010
2-27
Rosemount 3051S Series
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, 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. Open the equalize valve on the high pressure
(upstream) side of the transmitter.
Process
Equalize
(open)
Drain Vent
(closed)
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