Emerson Rosemount 644h, Reference Manual

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Reference Manual
00809-0100-4728, Rev HA
December 2002
2-3
Models 644H and 644R
MOUNTING
Mount the transmitter at a high point in the conduit run to prevent moisture
from draining into the transmitter housing.
The Model 644H installs
• In a connection head or universal head mounted directly on a sensor
assembly
• Apart from a sensor assembly using a universal head
• To a DIN rail using an optional mounting clip.
The Model 644R mounts directly to a wall or to a DIN rail.
Mounting a Model 644H to a DIN Rail
To attach a head mount transmitter to a DIN rail, assemble the appropriate rail
mounting kit (part number 00644-5301-0010) to the transmitter as shown in
Figure 2-2. Follow the procedure under “Rail Mount Transmitter and Sensor”.
Figure 2-2. Assembling Rail Clip
Hardware to a Model 644H
Retrofitting a Model 644H for Use in an Existing Threaded Sensor
Connection Head
To mount a Model 644H in an existing threaded sensor connection head
(former option code L1), order the Model 644H retrofit kit (part number
00644-5321-0010). The retrofit kit includes a new mounting bracket and all
associated hardware necessary to facilitate the installation of the Model 644H
in the existing head. See Figure 2-3.
Figure 2-3. Assembling Model
644H for Use in an Existing L1
Connection Head
G-Rail (asymmetric) Top Hat Rail (symmetric)
Note: Kit includes Mounting Hardware and both types of Rail Kits.
Transmitter
Mounting
Hardware
Rail Clip
Transmitter
Mounting
Hardware
Rail Clip
64
4-53
02B0
1
A,
D0
2A
64
4-53
21A0
1
A
Kit includes
replacement bracket
and screws.
Existing Threaded Sensor Connection Head
(Former option code L1)