Emerson Rosemount 248 Reference Manual page 21

Reference Manual
00809-0100-4825, Rev CB
Rail mount transmitter with threaded sensor
The least complicated assembly uses:
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Refer to Volume 1 of the Rosemount Sensors Product Data Sheet (Document No.
00813-0100-2654) for complete sensor and mounting accessory information.
To complete the assembly:
1.
2.
3.
4.
5.
6.
7.
8.
9.
Installation
a threaded sensor with flying heads
a threaded sensor connection head
a union and nipple extension assembly
a threaded thermowell
Attach the transmitter to a suitable rail or panel.
Attach the thermowell to the pipe or process container wall. Install and tighten the
thermowell before applying pressure.
Attach necessary extension nipples and adapters. Seal the nipple and adapter threads
with silicone tape.
Twist the sensor into the thermowell. Install drain seals if required for severe
environments or to satisfy code requirements.
Screw the connection head to the sensor.
Attach the sensor lead wires to the connection head terminals.
Attach additional sensor lead wires from the connection head to the transmitter.
Attach and tighten the connection head cover. Enclosure covers must be fully engaged
to meet explosion-proof requirements.
Attach the sensor and power leads to the transmitter. Avoid contact with leads and
terminals.
Figure 2-4. Typical Rail Mount Transmitter Mounting Configuration using
Threaded Style Sensor and Assembly
A
B
A. Rail mount transmitter
B. Threaded sensor connection head
C. Threaded style sensor
D
C
D. Standard extension
E. Threaded thermowell
Section 2: Installation
March 2014
E
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