Emerson Rosemount 3051 Reference Manual page 42

Section 2: Installation
November 2012
Always perform a zero trim on the transmitter/manifold assembly after installation to eliminate
any shift due to mounting effects. See
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.
2.
3.
32
To zero the 3051, close the
block valve to the low
pressure (downstream) side
of the transmitter first.
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.
After zeroing the transmitter,
close the equalizing valve.
"Sensor Trim Overview" on page
H
Drain/
Vent Valve
Isolate
(open)
H
Drain/
Vent Valve
Isolate
(open)
H
Drain/
Vent Valve
Isolate
(open)
H
Drain/
Vent Valve
Isolate
(open)
Reference Manual
00809-0100-4001, Rev JA
10.
L
Drain/
Vent
Valve
Equalize
(closed)
Isolate
(open)
Process
L
Drain/
Vent
Valve
Equalize
(closed)
Isolate
(closed)
Process
L
Drain/
Vent
Valve
Equalize
(open)
Isolate
(closed)
Process
L
Drain/
Vent
Valve
Equalize
(closed)
Isolate
(closed)
Process
Installation