Emerson 3051S Specifikace stáhnout pdf (Strana 39)

Reference Manual

00809-0100-4801, Rev FA

October 2010

2-25

Rosemount 3051S Series

Manifold Operation 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.

Three and five-valve configurations shown:

Drain/

Vent

Valve

Drain/

Vent

Valve

Equalize

(closed)

Process

Isolate

(open)

Isolate

(open)

In normal operation the two block valves between the

process and instrument ports will be open and the

equalizing valve will be closed.

Drain/

Vent

Valve

Equalize

(closed)

Process

Isolate

(closed)

Isolate

(open)

1. To zero the 3051S, close the block valve to the low

pressure (downstream) side of the transmitter first.

Drain/

Vent

Valve

Drain/

Vent

Valve

Drain/

Vent

Valve

Equalize

(open)

Process

Isolate

(closed)

Isolate

(open)

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.

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