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Example: Positive
Current Compliance
NOTE
Chapter 4
9. Remove power and disconnect test equipment
This program checks the MEASURED current output from the DAC
channel being tested. If the DC SOURCE voltage is 13.0V when the
output current drops to 90% of maximum current, the program generates a
"test PASSED" indication. If the DC SOURCE voltage is < 13.0V when the
output current drops to 90% of maximum current, the program generates a
"test FAILED" indication.
To use this program for negative current compliance tests, change the
indicated lines as shown:
50
OUTPUT 70909;"CURR"&VAL$(Chan)&" MIN"
60
Source = -11.5
90
Source = Source-.5
180 IF Source <= -13.0 THEN Tst$="PASSED"
190 IF Source > -13.0 THEN Tst$ ="FAILED"
10
! Current Compliance Tests
20
!
30
FOR Chan = 1 TO 4
40
OUTPUT 70909;"CAL"&VAL$(Chan)&":STAT OFF"
50
OUTPUT 70909;"CURR"&VAL$(Chan)&" MAX"
60
Source = 11.5
70
REPEAT
80
PRINT TABXY(1,1),"Current Compliance Tests on Channel";Chan
90
Source = Source + .5
100
PRINT TABXY(4,10),"Set DC source to ";Source;"Volts DC "
110
PRINT TABXY(4,11),"Measure channel output (in mA)"
120
INPUT " Enter channel output (in mA) ",Value
130
Result = ABS(100*Value/24.0)
140
PRINT TABXY(4,5),"DC Source value = ";Source;"VDC "
150
PRINT TABXY(4,6),"Channel";Chan;"output = ";Value;"mA"
160
PRINT TABXY(4,7),"Output = ";Result;"% of max value "
170 UNTIL Result <= 90.0
180 IF Source >= 13.0 THEN Tst$ = "PASSED"
190 IF Source < 13.0 THEN Tst$ = "FAILED"
200 CLEAR SCREEN
210 PRINT TABXY(4,14),"DC Source value for output 90% of max =
";Source;"VDC"
220 PRINT TABXY(4,15),"Test ";Tst$;" for Channel";Chan
230 NEXT Chan
240 END
Verification Tests 27
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