Counter Accuracy Measurements Test - HP E1328A Service Manual

Counter Accuracy
Measurements Test
Equipment Setup
Chapter 4
150 PRINT TABXY(1,10),"New voltage output on Channel";Chan;" =
":Volts(Chan,I);"V "
160 PRINT
170 INPUT " Enter MEASURED voltage value (in V) ",Meas(Chan,I)
180 GOSUB Accuracy
190 Accuracy: !
200 Acc(Chan,I) = .0035*ABS(Volts(Chan,I)) + .11334
210 Llim(Chan,I) = Volts(Chan,I) - Acc(Chan,I)
220 Ulim(Chan,I) = Volts(Chan,I) + Acc(Chan,I)
230 IF Meas(Chan,I) < Llim(Chan,I) OR Meas(Chan,I) > Ulim(Chan,I)
THEN
240 PRINT TABXY(1,9),"Test FAILED on Channel";Chan;"for
";Volts(Chan,I);"V"
250 ELSE
260 PRINT TABXY(1,9),"Test PASSED on Channel";Chan;"for
";Volts(Chan,I);"V "
270 END IF
280 NEXT I
290 NEXT Chan
300 PRINT TABXY(1,18) ,"Voltage Accuracy Tests Complete"
310 END
This test checks current output accuracy on Channels 1, 2, 3, and 4 of the
DAC. The current output levels checked are: -20 mA, -16 mA, -10 mA, -4
mA, 0 mA, 4 mA, 10 mA, 16 mA, and 20 mA.
Connect the equipment as shown in Figure 4-4. Be sure the three jumpers
in each DAC channel are set to the I (current) position. Then, set the
HP 3458A to DCI function and set NPLC 100.
Figure 4-4. Current Measurement Accuracy Connections
Verification Tests 31