ABB 266 MODBUS - Figure 23: RTD Probe

3 Installation
266 MODBUS® multivariable transmitter User manual 2105216 Rev. AB | 27
Installation of the RTD is complete. The RTD cable to transmitter wiring instructions are included in section 3.6.4, Transmitter
wiring.
Non-Incendive DIV 2 or general purpose RTD installation
Optionally supplied materials
— RTD probe with cable and cable gland installed (probe and cable length TBD by technician)
— Nylon tie wraps
— Teflon
®
tape
Instructions
1. Insert the RTD probe into the thermowell to determine the depth setting for the probe spring.
2. Using snap-ring pliers, adjust the retaining ring below the spring on the probe (Figure 23). Probe depth should be set so
that it is spring-loaded against the bottom of the thermowell.
RTD Probe
WHT
BLK
Shield
WHT
BLK
OUT
(-)
(+)
IN
Nylon sealing ring
Probe connector
Retaining ring
Spring
Cable
Cable gland
Cable nut
Cord sealing nut
Figure 23: RTD probe
3. Using Teflon
®
tape, wrap the probe connector threads to create a seal.
4. Screw the probe connector into the thermowell.
5. Remove the shipping plug from the transmitter housing.
6. Remove the rear housing cover from transmitter if not already removed (go to section 5.2, Transmitter hardware security
for additional instructions).
7. Run the RTD cable along the side of the process stream pipeline in a straight line. Use nylon tie wraps to secure the cable
to the pipeline. Do not wrap the RTD cable around the pipeline.
8. Remove the cable nut from the gland and insert the RTD cable end through the transmitter housing wiring port. Leave
enough cable inside the housing for wiring to the terminals inside the housing.
9. Screw the cable gland into the transmitter housing port.
10. Tighten the cord sealing nut to the cable gland against the RTD cable.
11. Secure the cable outside of the gland so that the cable turns down immediately. This will keep moisture from seeping into
the housing along the RTD cable.
12. Use the procedure in section 5.10, RTD wiring verification, to verify that the RTD to transmitter cable is in good working
condition.
Installation of the RTD is complete. The RTD cable transmitter wiring instructions are included in section 3.6.4, Transmitter
wiring.