GE DigitalFlow DF968, Service Manual

Page: 20 / 78

March 2008
1-12 Calibration
Totalizer/Frequency
Option Card
Totalizer/Frequency outputs may be added to the Model DF868 by
installing a
Totalizer/Frequency Option Card in one (or more) of the
six expansion slots. Each option card includes four outputs, which are
designated as A, B, C and D. To test the outputs, connect a frequency
counter to the card’s terminal block as shown in Figure 1-5 below.
Refer to the menu map in Figure 1-6 on page 1-15 as a guide.
Figure 1-5: Frequency Counter Connections
For this discussion, assume that the option card has been installed in
Slot x
.
Accessing the Calibration
Menu
1. Press the
[CAL]
key to enter the Calibration Program .
2. Press
[Fx]
to select
Slot x
. (The option bar will include a slot listing
for each installed option card.)
3. Press
[F1]-[F4]
to select output A, B, C or D, respectively.
Entering Frequency
4. Enter a new frequency in the range of 1-10,000 Hz and press the
[ENT]
key. Verify that the frequency counter reads the correct
value.
Terminal Block (Option Card)
B
COM
B
NO
A
COM
A
NO
8
1
Frequency
D
COM
D
NO
C
COM
C
NO
Counter
COM
IN