GE DigitalFlow DF968, Service Manual

Page: 11 / 78

Calibration 1-3
March 2008
Accessing the Calibration
Menu
Figure 1-2: Ammeter Connection (Output A)
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.)
3. Press
[Fx]
to select the desired output.
IMPORTANT:
The procedure for calibrating all outputs is the same.
However, when calibrating a different output, be sure
to reconnect the ammeter to the appropriate pins on
terminal block
I/O
. See Figure 1-1 on page 1-2 or
Figure 1-2 above for the correct pin numbers.
Calibrating the Low End of
the Output Range
1. Press
[F1]
to calibrate the low end of the output range.
2. Press
[F1]
or
[F2]
to adjust the ammeter reading
UP
or
DOWN
, until
a 4 mA reading is achieved. If you press
[F3]
,
Numer
, enter the
numeric value and press
[ENT]
.
3. Press
[F4]
to
STORE
the setting or press [
→]
and
[F1]
to
ABORT
the
calibration.
Note:
If the ammeter reading cannot be adjusted within 5.0
μ
A of the
4 mA setting, contact the factory for assistance.
Terminal Block (Option Card)
B
RTN
B
SIG
A
RTN
A
SIG
8
1
+
–
Ammeter
D
RTN
D
SIG
C
RTN
C
SIG