Rockwell Automation 61C615 RTD Termination Panel - Manual (Page 13)

3Ć3
3. Force the RTD to a known temperature or simulate a known
temperature by connecting a precision resistor at the RTD end of
the field wiring. For example, if R = 182.0 ohms, then look up in
the table in Appendix B the resistor values above and below
182.0 ohms. With these values and their equivalent temperatures,
interpolate to find the expected temperature.
Deg. C OHMS
210 179.51
X 182.0ă
220 183.17
ăăăăX = 216.80 deg. C
4. Adjust the linearity potentiometer for the corresponding
simulated temperature. The temperature should be at the upper
end of the operating range and must be well away from 0 deg C.
The linearity potentiometers are located at the back of the panel.
Each channel has a separate linearity adjustment labeled LI".
3.4 Panel Replacement
Use the following procedure to replace a termination panel:
Step 1.
Turn off power to the rack and all connections.
Step 2. Use a screwdriver to loosen the screws holding the field
wires to the termination panel. Make certain that the wires
are tagged so that they can be replaced in the correct
order.
Step 3. Remove the 50Ćpin flat cables from the back of the
termination panel.
Step 4. Remove the termination panel.
Step 5. Follow steps 2Ć6 in the installation procedure, section 3.2.