Rosemount Model 3144 and 3244MV Smart Temperature Transmitters
2-12
Moist or Corrosive
Environments
The Model 3144 and 3244MV transmitters have a highly reliable
dual compartment housing designed to resist attack by moisture and
corrosives. The sealed electronics module is mounted in a
compartment that is isolated from the terminal side conduit entries.
O-ring seals protect the interior when the covers are installed. In
humid environments, however, it is possible for moisture to
accumulate in conduit lines and drain into the housing.
Proper transmitter installation can ensure optimal operation and
service life and prevent moisture from accumulating in the housing.
Refer to Figure 2-11, and Figure 2-12 before mounting a transmitter.
Mount the transmitter at a high point in the conduit run, if possible,
so that moisture from the conduits will not drain into the housing. If
the transmitter is mounted at a low point in the conduit run, the
terminal compartment could fill with water. In some instances, the
installation of a poured conduit seal, such as the one pictured in
Figure 2-12, is advisable. Remove the terminal compartment cover
periodically and inspect the transmitter for moisture and corrosion.
Figure 2-11. Incorrect Conduit
Installation.
Figure 2-12. Recommended Mounting
with Drain Seal.
Conduit
Lines
Conduit
Lines
3
144-
0429
A
,
04
29B
Thermowell
Sensor Hex
Conduit for
Field Wiring
Poured Conduit Seal
(Where Required)
Union Coupling
with Extension
Sealing
Compound
314
4-
0
430B
