Zeroing Transmitter; Damping; Rosemount 305, 306, And 304 Manifolds; Rosemount 305 Integral Manifold Installation Procedure - Emerson Rosemount 3051S Series Reference Manual

Reference Manual
00809-0200-4801, Rev DA
2.7

Zeroing transmitter

Before operating the transmitter, perform a Zero Trim and set the Damping. Refer to
page 53
2.7.1

Damping

The damping parameter in the Transducer Block may be used to filter measurement noise. By increasing
the damping time, the transmitter will have a slower response time, but will decrease the amount of
process noise that is translated to the Transducer Block Primary Value. Because both the LCD display and
AI Block get input from the Transducer Block, adjusting the damping parameter will affect both blocks.
Note
The AI Block has it's own filtering parameter called PV_FTIME. For simplicity, it is better to do filtering in
the Transducer Block as damping will be applied to primary value on every sensor update. If filtering is
done in AI block, damping will be applied to output every macrocycle.
2.8

Rosemount 305, 306, and 304 Manifolds

The Rosemount 305 Integral Manifold mounts directly to the transmitter and is available in two styles:
traditional and coplanar. The traditional Rosemount 305 can be mounted to most primary elements in
the market today using mounting adapters.
The Rosemount 306 Integral Manifold is used with in-line transmitters to provide block-and-bleed valve
capabilities of up to 10000 psi (690 bar).
The Rosemount 304 conventional manifold combines a traditional flange and manifold that can be
mounted to most primary elements.
2.8.1

Rosemount 305 Integral Manifold installation procedure

To install a Rosemount 305 to a Rosemount 3051S:
1. Inspect the PTFE sensor module O-rings. If the O-rings are undamaged, reusing them is
recommended. If the O-rings are damaged (if they have nicks or cuts, for example), replace them with
new O-rings.
Important
If replacing the O-rings, be careful not to scratch or deface the O-ring grooves or the surface of the
isolating diaphragm when removing the damaged O-rings.
2. Install the integral manifold on the sensor module. Finger tighten the bolts, then tighten the bolts
incrementally in a cross pattern (see
complete bolt installation information and for torque values. When fully tightened, the bolts should
extend through the top of the module housing plane of the flange web (i.e. bolt hole) but must not
contact the module housing.
3. If the PTFE sensor module O-rings have been replaced, the flange bolts should be re-tightened after
installation to compensate for cold flow of the O-rings.
4. If applicable, install flange adapters on the process end of the manifold using the 1.75-in. flange bolts
supplied with the transmitter.
Installation
for zeroing procedures.
Figure 2-10) to final torque value. See
Installation
October 2016
"Calibration" on
Table 2-1 on page 8 for
17