Keithley 6430 User Manual

SCPI Command Reference 17-69
Set voltage limit
[:LEVel] <n>
:SOURce[1]:VOLTage:PROTection[:LEVel] <n> Set voltage limit for V-Source
Parameters <n> = -210 to 210 Specify V-Source limit
20 Set limit to 20V
40 Set limit to 40V
60 Set limit to 60V
80 Set limit to 80V
100 Set limit to 100V
120 Set limit to 120V
160 Set limit to 160V
161 to 210 Set limit to NONE
NONE Set limit to 210V
DEFault Set limit to 210V (NONE)
MINimum Set limit to 20V
MAXimum Set limit to 210V (NONE)
Query [:LIMit]? Query limit level
[:LIMit]? DEFault Query *RST default limit
[:LIMit]? MINimum Query lowest allowable limit
[:LIMit]? MAXimum Query highest allowable limit
Description This command is used to set the Over Voltage Protection (OVP) limit for the
V-Source. The V-Source output will not exceed the selected limit. An
exception to this is a parameter value that exceeds 160V. Exceeding this
value allows the V-Source to output its maximum voltage. The OVP limit is
also enforced when in the I-Source Mode.
The limit parameter values are magnitudes and are in effect for both positive
and negative output voltage. You can express the limit as a positive or nega-
tive value.
If you specify a value that is less than the lowest limit, the lowest limit will
be selected. If you specify a value that is between limits, the lower limit will
be selected. For example, if you specify a value of 110, the 100V limit will
be selected.
WARNING Even with the voltage protection limit set to the lowest value (20V),
NEVER touch anything connected to the terminals of the SourceMeter
when the OUTPUT is ON. Always assume that a hazardous voltage
(>30V rms) is present when the OUTPUT is ON.
To prevent damage to DUT (devices under test) or external circuitry, DO
NOT program the V-Source to levels that exceed the voltage protection
limit.

Keithley 6430 Specifications

General

Type	Sub-Femtoamp Remote SourceMeter
Compliance Voltage	200 V
Maximum Output Voltage	200 V
Maximum Output Current	100 mA
Compliance Limit	Programmable
Interface	GPIB, RS-232
Input Impedance	>10^14 Ω

Summary

Safety Precautions

3 Basic Source-Measure Operation

Basic Source-Measure Procedure

Details setup for source-measure operations: function, values, limits, and output control.

5 Source-Measure Concepts

Compliance limit

Discusses compliance limits, values, and determination.

Operating boundaries

Covers voltage/current boundaries for source, sink, I-source, V-source, and source-measure modes.

6 Range, Digits, Speed, and Filters

Range and digits

Discusses available ranges, limits, manual/autoranging, and display resolution.

Speed

Filters

Provides information on 3-stage filtering to reduce reading noise.

7 Relative and Math

Math Operations

Details math (FCTN) operations: power, offset ohms, varistor, etc.

9 Sweep Operation

Configuring and Running a Sweep

Discusses setup, configuration, delay setting, and performing sweeps.

10 Triggering

Trigger Model

Discusses trigger model, layers, event detection, delay, and device action.

Configuring Triggering

Details how to configure various triggering aspects.

Remote Triggering

Details remote trigger model, commands, and basic triggering example.

11 Limit Testing

Types of Limits

Discusses three limit types: compliance, coarse, fine; summarizes grading and sorting modes.

Configuring and Performing Limit Tests

Describes configuration for limit tests and typical test procedure.

Remote Limit Testing

12 Digital I/O Port, Interlock, and Output Configuration

Digital I/O Port

Safety Interlock

Describes using Digital I/O Port as a safety interlock.

Front Panel Output Configuration

14 Status Structure

Programming and Reading Registers

Status Byte and Service Request (SRQ)

Explains programming Status Byte for SRQs and using serial poll to detect SRQs.

15 Common Commands

Command Summary

Lists IEEE-488.2 common commands used by the SourceMeter.

Command Reference

Provides detailed reference for common commands, excluding status structure.

16 SCPI Signal-Oriented Measurement Commands

Command Summary

Configuring Measurement Function

Provides detailed info on commands to configure measurement function.

Acquiring Readings

Describes commands to acquire post-processed readings, trigger, acquire, and single measurement.

17 SCPI Command Reference

18 Performance Verification

Verification Test Requirements

Recommended Test Equipment

Performing the Verification Test Procedures

Details restoring factory defaults, setting ranges, and output values.

Mainframe Verification

Covers procedures to verify mainframe accuracy alone.

19 Calibration

Recommended Calibration Equipment

Unlocking Calibration

Mainframe Calibration

Includes procedures to calibrate the mainframe without the Remote PreAmp.

20 Routine Maintenance

Line Fuse Replacement

Covers procedure and part numbers for replacing the line fuse.

Front Panel Tests

F Measurement Considerations

Floating measurement safety concerns

Discusses safety concerns for measurements up to 42V above chassis ground.

Low current measurements

Leakage currents and guarding

Explains reducing leakage currents using insulators, humidity control, and guarding.