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Example: One Channel
Electronic Current
Adjustment Using an
External Multimeter
Chapter 3
Figure 3-5 shows how to connect channel 1 output terminals to the load and
external multimeter (HP 3457A). The D/A Converter must be physically
configured to provide current output on channel 1 (refer to page 17), and
then instructed to perform the adjustment. For the example, use:
An HP-IB select code of 7, primary address of 09, and secondary
–
address of 09 for the D/A Converter.
An HP Series 200/300 computer with HP BASIC.
–
Execute:
10
REAL A,B,C,
20
OUTPUT 70909;"*RST"
30
OUTPUT 70909;"CAL1:STAT OFF"
40
OUTPUT 70909;"CURR1 MIN"
50
PRINT "RECORD AS MINIMUM"
60
INPUT "ENTER RECORDED MIN: ",A !Message on screen instructs to
70
OUTPUT 70909;"CURR1 DEF"
80
PRINT "RECORD AS DEFAULT"
90
INPUT "ENTER RECORDED DEF: ",B !Message on screen instructs to
100
OUTPUT 70909;"CURR1 MAX"
110
PRINT "RECORD AS MAXIMUM"
120
INPUT "ENTER RECORDED MAX: ",C!Message on screen instructs to
130
OUTPUT 70909; "CAL1:CURR ";A;B;C,!Enter the measured minimum,
!Define variables used to store
measured values.
!Reset the D/A Converter to its
default state and performs a
self-test.
!Configure channel 1 to the
non-calibrated mode.
!Configure channel 1 to output the
minimum current (–24 mAdc).
!Message on screen instructs to
record the measurement on the
multimeter as minimum.
enter the recorded minimum
value. Enter and press RETURN.
!Configure channel 1 to output
the default current (0 mAdc).
!Message on screen instructs to
record the measurement on the
multimeter as default.
enter the recorded default value.
Enter and press RETURN.
!Configure channel 1 to output the
maximum current (+24 mAdc).
!Message on screen instructs to
record the measurement on the
multimeter as maximum.
enter the recorded maximum
value. Enter and press RETURN.
default, and maximum values.
New adjustment constants are
then calculated and stored for
channel 1.
Using the HP E1328A
27
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