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Negative Current Compliance Tests
For negative current compliance tests each channel to be tested is set for
UNCALIBRATED MIN current output (-24 mA). A DC source and
HP 3458A are connected to the channel to be tested. The source is set to
-12V and increased in -0.5V steps until the channel output decreases to 90%
of the maximum current value (decreases to -21.6 mA). If the DC SOURCE
voltage is -13V when the channel output decreases to 90% of maximum
current, the test passes.
Equipment Setup
Connect the DC source (Datron 4708 with Option 10) and HP 3458A
multimeter to Channel 1 as shown in Figure 4-2. (Be sure to set all three
channel jumpers to the I position.) Then, set the DC source output to
+12.0 Vdc. Set the HP 3458A to DCI function and set NPLC 100.
NOTE
For best measurement accuracy, perform an HP 3458A multimeter ACAL
not more than 24 hours prior to these tests.
Figure 4-2. Current Compliance Test Connections
Chapter 4
Verification Tests 25
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