Keithley 6430 User Manual

SCPI Command Reference 17-99
:TRACe subsystem
The commands in this subsystem are used to configure and control data storage into the
buffer. The commands are summarized in Table 17-9.
:TRACe|:DATA
The bar (|) indicates that :TRACe or :DATA can be used as the root command for this sub-
system. From this point on, the documentation in this manual uses :TRACe. If you prefer to use
:DATA, simply replace all the :TRACe command words with :DATA.
Read and clear buffer
:DATA?
:TRACe:DATA? Read contents of buffer
Description When this command is sent and the SourceMeter is addressed to talk, all the
readings stored in the data store are sent to the computer.
The format used to send readings over the bus is controlled from the
:FORMat subsystem.
NOTE See Appendix C for a detailed explanation on how data flows through the various
operation blocks of the SourceMeter. It clarifies the types of readings that are
acquired by the various commands to read data.
:CLEar
:TRACe:CLEar Clear buffer
Description This action command is used to clear the buffer of readings. If you do not
clear the buffer, a subsequent store will overwrite the old readings.
Configure and control buffer
:FREE?
:TRACe:FREE? Read status of memory
Description This command is used to read the status of storage memory. After sending
this command and addressing the SourceMeter to talk, two values separated
by commas are sent to the computer. The first value indicates how many
bytes of memory are available, and the second value indicates how many
bytes are reserved to store readings.

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.