Emerson Rosemount 3051S Series Reference Manual page 30

Installation
October 2016
Coplanar transmitters
3-valve and 5-valve manifolds
Performing zero trim at static line pressure
In normal operation the two isolate (block) valves
between the process ports and transmitter will be open
and the equalize valve will be closed.
1. To zero trim the transmitter, close the isolate valve on
the low side (downstream) side of the transmitter.
2. Open the equalize valve to equalize the pressure on
both sides of the transmitter. The manifold is now in
the proper configuration for performing a zero trim
on the transmitter.
3. After performing a zero trim on the transmitter, close
the equalize valve.
4. Finally, to return the transmitter to service, open the
low side isolate valve.
20
Reference Manual
00809-0200-4801, Rev DA
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
H
Drain/Vent
valve
Equalize
(closed)
Isolate
(open)
Process
H
Drain/Vent
valve
Equalize
(closed)
Isolate
(open)
Process
L
Drain/Vent
valve
Isolate
(open)
L
Drain/Vent
valve
Isolate
(closed)
L
Drain/Vent
valve
Isolate
(closed)
L
Drain/Vent
valve
Isolate
(closed)
L
Drain/Vent
valve
Isolate
(open)
Installation