30-03-2012, 11:20 AM
Rosemount 248 Temperature Transmitter
00825-0100-4825.pdf (Size: 765.07 KB / Downloads: 50)
CONFIGURE (BENCH CALIBRATION)
The Rosemount 248 communicates using the 375 Field Communicator (communication
requires a loop resistance between 250 and 1100 ohms. Do not operate when power is
below 12Vdc at the transmitter terminal). Refer to the Rosemount 248 Reference Manual
(document number 00809-0100-4825) and the 375 Field Communicator Reference Manual
Connecting a Field Communicator
The Hand-held Communicator Field Device Revision Dev v1, DD v1 is required for complete
functionality.
Typical North and South American Installation Head Mount Transmitter with Threaded Sensor
1. Attach the thermowell to the pipe or process container wall. Install and tighten
thermowells before applying process pressure.
2. Attach necessary extension nipples and adapters to the thermowell. Seal the nipple and
adapter threads with silicone tape.
3. Screw the sensor into the thermowell. Install drain seals if required for severe
environments or to satisfy code requirements.
4. Pull the sensor wiring leads through the universal head and transmitter. Mount the
transmitter in the universal head by threading the transmitter mounting screws into the
universal head mounting holes.
5. Mount the transmitter-sensor assembly into the thermowell. Seal adapter threads with
silicone tape.
6. Install conduit for field wiring to the conduit entry of the universal head. Seal conduit
threads with silicone tape.
7. Pull the field wiring leads through the conduit into the universal head. Attach the sensor
and power leads to the transmitter. Avoid contact with other terminals.
8. Install and tighten the universal head cover. Enclosure covers must be fully engaged to
meet explosion-proof requirements.