DigitalFlow™ GC868 Service Manual (1 and 2-Channel)
1-6
Chapter 1. Calibration
1.4.2
aLOW Option = [F1]
1.
Enter the low reference value and press the
[ENT]
key.
2.
Press
[F1]
to store the current low reference value or press
[F2]
to cancel the
entry. In either case, the
ANALOG INPUT
prompt will reappear.
3.
Press
[F2]
to proceed to the next section.
1.4.3
aHIGH Option =
[F2]
1.
Enter the high reference value and press the
[ENT]
key.
2.
Press
[F1]
to store the current high reference value or press
[F2]
to cancel the
entry. In either case, the
ANALOG INPUT
prompt will reappear.
3.
Proceed to
Procedure Options
below.
1.4.4
4 mA Option = [F3]
1.
Connect the 4 mA current source to the currently selected analog input, as
shown in Figure 1-3 on page 1-5.
2.
Press
[F1]
to store the current 4 mA value or press
[F2]
to cancel the entry. In
either case, the
ANALOG INPUT
prompt reappears.
3.
Press
[F4]
to proceed to the next section.
1.4.5
20 mA Option =
[F4]
1.
Connect the 20 mA current source to the currently selected analog input, as
shown in Figure 1-3 on page 1-5.
2.
Press
[F1]
to store the current 20 mA value or press
[F2]
to cancel the entry. In
either case, the
ANALOG INPUT
prompt reappears.
3.
Proceed to
Procedure Options
below.
1.4.5.1
Procedure Options
You have completed calibration of the analog output. Do one of the following:
• To calibrate another input, return to Step 3 in
Accessing the Calibration Menu
on page 1-5.
• To calibrate/test additional slots, press
[F4] (EXIT)
and proceed to the
appropriate section.
• To leave the Calibration Menu, press
[F4] (EXIT)
twice.
1.5
Calibrating the
RTD Inputs
Calibrating an RTD option card involves a different procedure than for other analog
input cards. However, you access the card in the same manner as other cards.
1.5.1
Accessing the
Calibration Menu
1.
Press the
[CAL]
key to enter the
Calibration Program
.
2.
Press
[Fx]
to calibrate
the desired slot
. (The option bar will include a slot listing
for each installed option card.)
If you have installed an RTD option card, the following screen appears:
The Probe option allows the meter to calculate the temperature vs. resistance curve,
based on input from the RTD in a temperature bath or from an RTD calibrator. The
Numer option forces the user to calculate and input the curve values numerically.
IMPORTANT:
Use only one option for RTD calibration. Do not try to calibrate with both
options.
CALIBRATION
Press
[F1]
to select the Probe
method of calibration, or
[F2]
to select the numeric method.
Slot x Inputs
current input selected
RTD CALIBRAT
last option selected
Probe
Numer