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NOTE
Adjustment
Procedures
Example: Current
Adjustments
Chapter 5
The value of 500
in Figure 5-2 is the factory value used for original
adjustments. If you previously adjusted your DAC with a different
resistance value, use that resistance value rather than 500
Set three jumpers on Channel 1 to the I position.
1.
2.
Connect a 500
5-2).
Set Channel 1 to non-calibrated mode with CAL1:STAT OFF.
3.
Set Channel 1 to minimum output (-.024 A) with CURR1 MIN.
4.
Measure and record to 5 1/2 digits the actual output current (in
Amps).
Set Channel 1 to default output (0 A) with CURR1 DEF. Measure
5.
and record to 5 1/2 digits the actual output current (in Amps).
Set Channel 1 to maximum output (+.024 A) with CURR1 MAX.
6.
Measure and record to 5 1/2 digits the actual output current (in
Amps).
Enter recorded minimum, default, and maximum values with
7.
CAL1:CURR min,def,max. The adjustment constants are
automatically updated and stored.
Repeat steps 1 through 7 for channels 2, 3, and 4 as desired (use
8.
CALchan:STAT OFF, CURRchan value, and CALchan:CURR
values).
Remove power and disconnect power equipment.
9.
This program uses the measured minimum, default, and maximum values
you enter to update the current adjustment constants for Channels 1, 2, 3,
and 4.
10
! Current Adjustments
20
!
30
DISP CHR$(129)
40
FOR Chan= 1 TO 4
50
PRINT TABXY(1,1),"Current Adjustments on Channel";Chan
60
OUTPUT 70909;"CAL"&VAL$(Chan)&":STAT OFF"
70
OUTPUT 70909;"CURR"&VAL$(Chan)&" MIN"
80
PRINT TABXY(1,18),"Channel";Chan;"is set to minimum (-.024 A)"
90
INPUT "Enter measured value (in A to 5.5 digits) ",Min
100 OUTPUT 70909;"CURR"&VAL$(Chan)&" DEF"
110 PRINT TABXY(1,18),"Channel";Chan;"is set to default (0 A) "
120 INPUT "Enter measured value (in A to 5.5 digits) ",Def
130 OUTPUT 70909;"CURR"&VAL$(Chan)&" MAX"
140 PRINT TABXY(1,18),"Channel";Chan;"is set to maximum (+.024 A)"
150 INPUT "Enter measured value (in A to 5.5 digits) ",Max
resistor and HP 3458A to Channel 1 (see Figure
.
Adjustments 41
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