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March 2008
Calibrating the Analog
Outputs
1-2
Every Model DF868 flowmeter includes two built-in analog outputs
(A and B) at terminal block
zero-point and full-scale values for each output must be calibrated.
After calibrating the outputs, which have a resolution of 5.0 μA
(0.03% full scale), their linearity should be tested.
Note: The zero point of the analog output may be set for either 0 mA
or 4 mA. However, the calibration procedure always uses the 4
mA point, as the meter will extrapolate this value to obtain the
0 mA point.
Prepare for the calibration procedure by connecting an ammeter to
Slot 0
analog output A of
menu map in Figure 1-6 on page 1-15.
Terminal Block I/O (Slot 0)
4
B
RTN
SIG
Figure 1-1: Ammeter Connection (Output A)
[CAL]
Press the
key to enter the Calibration Program:
CALIBRATION
Cal
last slot selected
SLOT0 SLOT1 SLOT2 SLOT3
I/O
, which is designated as
, as shown in Figure 1-1 below. Refer to the
B
A
A
RTN
SIG
-
Ammeter
[F1]
‰
Press
to calibrate
option bar will include a slot
listing for each installed option
card.)
Slot 0
. Both the
1
+
Slot 0
. (The
Calibration
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