Manifold Operation - Emerson Rosemount 3051S Series Reference Manual

Reference Manual
00809-0100-4801, Rev FA
October 2010

Manifold Operation

Three and five-valve configurations shown:
In normal operation the two block valves between the
process and instrument ports will be open and the
equalizing valve will be closed.
1. To zero the 3051S, close the block valve to the low
pressure (downstream) side of the transmitter first.
2. Open the center (equalize) valve to equalize the
pressure on both sides of the transmitter. The
manifold valves are now in the proper
configuration for zeroing the transmitter.
Improper installation or operation of manifolds may result in process leaks,
which may cause death or serious injury.
Always perform a zero trim on the transmitter/manifold assembly after
installation to eliminate any shift due to mounting effects. See Section 4
Operation and Maintenance, "Sensor Trim Overview" on page 4-5.
Rosemount 3051S Series
H
Drain/
Vent
Valve
Equalize
(closed)
Isolate
(open)
Process
H
Drain/
Vent
Valve
Equalize
(closed)
Isolate
(open)
Process
H
Drain/
Vent
Valve
Equalize
(open)
Isolate
(open)
Process
L
Drain/
Vent
Valve
Isolate
(open)
L
Drain/
Vent
Valve
Isolate
(closed)
L
Drain/
Vent
Valve
Isolate
(closed)
2-25