Instruction manual

52
MODEL XMT-A-FF/FI SECTION 8.0
CALIBRATION — TEMPERATURE
4. Press MENU. The menu screen appears. Choose Calibrate.
5. Choose Temp.
6. If transmitter was programmed in Section 7.5 to use the actual process
temperature, go to step 7.
If the transmitter was programmed to use a temperature entered by the
user, go to step 9.
7. To calibrate the temperature, change the number in the second line to
match the temperature measured with the standard thermometer.
Press ENTER.
8. Press MENU then EXIT to return to the main display.
9. If the temperature value shown in the display is not correct, use the
arrow keys to change it to the desired value. The transmitter will use the
temperature entered in this step in all measurements and calculations,
no matter what the true temperature is.
10. Press MENU then EXIT to return to the main display.
8.2 PROCEDURE: CALIBRATING TEMPERATURE
1. Remove the sensor from the process liquid. Place it in an insulated container of water along with a calibrated
thermometer. Submerge at least the bottom two inches of the sensor. Stir continuously.
2. Allow the sensor to reach thermal equilibrium. For some sensors, the time constant for a change in tempera-
ture is 5 min., so it may take as long as 30 min. for temperature equilibration.
3. Change the Solu Comp Xmt display to match the calibrated thermometer using the procedure below.
Cal?
Measurement
Temp
Calibrate
Sim. PV
Program Display
Live 25.0ºC
Cal
+
025.0ºC
Manual Temp?
+25.0ºC