Figure 9 Typical Flange Mounted Transmitter Installation - Honeywell ST 3000 User Manual

Step
communicator.
9 Continue with the remaining installation tasks.
Flange mounting
Transmitters that are furnished with integral flange connections (models STFxxx), are bolted directly to the
process flange connection. Figure 9 shows a typical installation for a transmitter with the flange on the high
pressure (HP) side so the HP diaphragm is in direct contact with the process fluid. The low pressure (LP)
side of the transmitter is vented to atmosphere (no connection).
To mount a flange mounted transmitter model, bolt the transmitter's flange to the flange pipe on the wall of
the tank.
ATTENTION
On insulated tanks, remove enough insulation to accommodate the flange extension.
Once the transmitter is mounted, the electronics housing can be rotated to the desired
position. See Table 6, Step 4 for details.
It is the End User's responsibility to provide a flange gasket and mounting hardware that are
suitable for the transmitter's service condition.
To prevent degradation of performance in Flush-Mounted Flanged Transmitters, exercise care to
ensure that the internal diameter of the flange gasket does not obstruct the sensing diaphragm.
To prevent degradation of performance in Extended Mount Flanged Transmitters, ensure that
there is sufficient clearance in front of the sensing diaphragm body.
Variable
Head H1
10/05
Maximum Level
Minimum Level

Figure 9 Typical Flange Mounted Transmitter Installation

ST 3000 HART Transmitter Release 300 User Manual
4— Installation - Mounting ST 3000 Transmitter
Action
Attention: Dotted area indicates use
with closed tank with reference leg.
HP Side
LP Side vented
mounted
to atmosphere
to tank
Reference
Leg
23