Rosemount 248, Reference Manual

Page: 14 / 80

Reference Manual
00809-0100-4825, Rev BB
August 2005
Rosemount 248
2-4
INSTALLATION
The Rosemount 248 can be ordered assembled to a sensor and thermowell
or as a stand-alone unit. If ordered without the sensor assembly, use the
following guidelines when installing the transmitter with an integral sensor
assembly.
Typical European and
Asia Pacific Installation
Head Mount Transmitter with DIN Plate Style Sensor
1. Attach the thermowell to the pipe or process container wall. Install
and tighten the thermowell before applying process pressure.
2. Assemble the transmitter to the sensor. Push the transmitter
mounting screws through the sensor mounting plate and insert the
snap rings (optional) into the transmitter mounting screw groove.
3. Wire the sensor to the transmitter (see “Sensor Wiring Diagrams” on
page 2-10).
4. Insert the transmitter-sensor assembly into the connection head.
Thread the transmitter mounting screw into the connection head
mounting holes. Assemble the extension to the connection head.
Insert the assembly into the thermowell.
5. Slip the shielded cable though the cable gland
6. Attach a cable gland into the shielded cable.
7. Insert the shielded cable leads into the connection head through the
cable entry. Connect and tighten the cable gland.
8. Connect the shielded power cable leads to the transmitter power
terminals. Avoid contact with sensor leads and sensor connections.
9. Install and tighten the connection head cover. Enclosure covers must
be fully engaged to meet explosion-proof requirements.
A = Rosemount 248 Transmitter D = Transmitter Mounting Screws
B = Connection Head E = Integral Mount Sensor with Flying Leads
C = Thermowell F = Extension
A
D
B
C
3144-0433QIG
E
F