Calibrating Rtd's - GE CTF878 User & Service Manual

Calibrating RTD's

Calibration
The RTD calibration procedure consists of setting the low and high
temperature readings.
To calibrate an RTD you must connect an RTD to the RTD board.
Proceeding as above, select the desired Calibrate RTD option, and
press [ENTER]. The screen appears as in Figure 3-8 below. Step
through options using the arrow keys.
Totalizer/Frequency 3:0
Calibrate Analog Input
1000
Low
High
Calibrate
Figure 3-8: RTD Calibration Window
1. The first prompt asks you to set the low temperature.
a. Press
[ENTER]
to open the text box.
b. Use the numeric keys to enter the desired value.
c. Press
[ENTER]
to confirm your entry.
2. Press the [ ] arrow key to move to the Read box, and then press
[ENTER]
to read the low temperature.
3. Scroll to the Calibrate box and press [ENTER]. The low point has
been calibrated.
4. The next prompt asks for the value to which you want to set the
high temperature.
a. Press
[ENTER]
to open the text box.
b. Use the numeric keys to enter the desired value.
c. Press
[ENTER]
to confirm your entry.
5. Press the [ ] arrow key to move to the Read box, and then press
[ENTER]
to read the high temperature.
6. Scroll to the Calibrate box and press [ENTER]. The high point has
been calibrated.
Calibrate RTD
4 0
C Read
100 C Read
Reset
Cancel OK
February 2009
3-9