Determining Compliance Limit; Taking The Sourcemeter Out Of Compliance; Output Voltage Accuracy - Keithley 2430 Service Manual

1-8 Performance Verification
When the SourceMeter goes into compliance, the "Cmpl" label or the units label (i.e., "mA")
for the compliance display will flash.

Determining compliance limit

The relationships to determine which compliance is in effect are summarized as follows.
They assume that the measurement function is the same as the compliance function.
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•
You can determine the compliance that is in effect by comparing the displayed compliance
setting to the present measurement range. If the compliance setting is lower than the maximum
possible reading on the present measurement range, the compliance setting is the compliance
limit. If the compliance setting is higher than the measurement range, the maximum reading on
that measurement range is the compliance limit.

Taking the SourceMeter out of compliance

Verification measurements should not be made when the SourceMeter is in compliance. For
purposes of the verification tests, the SourceMeter can be taken out of compliance by going into
the edit mode and increasing the compliance limit.
NOTE

Output voltage accuracy

Follow the steps below to verify that Model 2430 output voltage accuracy is within specified
limits. This test involves setting the output voltage to each full-range value and measuring the
voltages with a precision digital multimeter.
1.
2.
3.
Compliance Setting < Measurement Range = Real Compliance
Measurement Range < Compliance Setting = Range Compliance
Do not take the unit out of compliance by decreasing the source value or changing
the range. Always use the recommended range and source settings when performing
the verification tests.
With the power off, connect the digital multimeter to the Model 2430 INPUT/OUTPUT
jacks, as shown in Figure 1-1.
Select the multimeter DC volts measuring function.
Press the Model 2430 SOURCE V key to source voltage, and make sure the source out-
put is turned on.