Keithley 4200A-SCS Reference Manual page 313

Section 6: Clarius Model 4200A-SCS Parameter Analyzer Reference Manual
Overvoltage Protection
Overvoltage protection restricts the maximum voltage level that the instrument can source. It is in
effect when either current or voltage is sourced.
This protection is in effect for both positive and negative output voltages.
When this attribute is used in a test sequence, it should be set before turning the source on.
Even with the overvoltage protection set to the lowest value, never touch anything
connected to the terminals of the 4200A-SCS when the output is on. Always assume that a
hazardous voltage (greater than 30 V ) is present when the output is on. To prevent
RMS
damage to the device under test or external circuitry, do not set the voltage source to levels
that exceed the value that is set for overvoltage protection.
Asserting the interlock allows the SMU and preamplifier terminals to become hazardous,
exposing the user to possible electrical shock that could result in personal injury or death.
SMU and preamplifier terminals should be considered hazardous even if the outputs are
programmed to be low voltage. Precautions must be taken to prevent a shock hazard by
surrounding the test device and any unprotected leads (wiring) with double insulation for
250 V, Category O.
Measure Current (Current)
When this box is selected, the instrument measures current. Current is recorded in the Analyze sheet
and shown in the graph.
Current Column Name
The name of the current measurement. This is the name that Clarius displays in the Analyze
spreadsheet column for that measurement.
If you do not define a name, Clarius assigns a name. The assigned name is a combination of the
terminal label and I for current. For example, the Base terminal is assigned the name BaseI.
This cannot be left blank. If it is left blank, Clarius uses the previous value.
The name is updated when the test is run. The results from earlier tests that are available through
Run History are not changed to the new name.
Low Range
Available when the Measure Range is set to Limited Auto. This sets the minimum range that the
instrument uses.
6-44 4200A-901-01 Rev. C / February 2017