Panametrics GF868, Service Manual

Page: 18 / 68

Chapter 1. Calibration
10 DigitalFlow™ GF868 Service Manual (1 and 2-Channel)
1.5.3 Numer Option = [F2]
The Numer option forces the user to calculate the temperature vs. resistance information. To do this, the user must
first collect data using the RTDs option in the PRINT menu (discussed in Chapter 5 of the
Programming Guide). The
RTDs option allows you to know what point value the GF868 is reading at a given temperature. With this information,
the Numer option enables you to enter the Set Temperature and the slope of the RTD input in points/degree, allowing
absolute control over RTD calibration. Before attempting this step, follow the instructions in Chapter 5 of the
Programming Manual (“The RTDs Submenu”) to obtain point values at your set point and slope point.
1. Press
[F1]
to select Input A, or
[F2]
to select Input B.
1.5.3.1 Set Number
2. Press
[F1]
to enter the set number (formerly known as the zero point).
3. Enter the set point temperature, and press [ENT] .
4. The program then asks for the set point number. Enter the points measured at the set temperature, and press
[ENT] .
1.5.3.2 Slope Number
5. Press [F2] to enter the slope number. Calculate the slope number with the formula:
Slope=Slope points - set points
slope temp - set temp
6. Enter the RTD slope number and press
[ENT]
.
1.5.3.3 Procedure Options
You have completed calibration of the RTD input. Do one of the following:
• To calibrate another input, press [EXIT].
• To calibrate additional slots, press [EXIT] and then
[F4] (EXIT)
and proceed to the appropriate section.
• To leave the Calibration Menu, press
[F4] (EXIT)
twice.