Keithley 6430 User Manual

8-2 Data Store
Data store overview
The SourceMeter has a data store (buffer) to store from 1 to 2500 source-measure readings.
The instrument stores the source-measure readings that are displayed during the storage pro-
cess. Each source-measure reading also includes the buffer location number and a timestamp.
“Cmpl” will flash in buffer recall if the reading is in compliance.
The data store also provides statistical data on the measured readings stored in the buffer.
These include minimum, maximum, mean, and standard deviation.
NOTE For a sweep that has a finite sweep count, the readings are automatically stored in
the buffer.
Front panel data store
Storing readings
Perform the following steps to store readings:
1. Set up the SourceMeter for the desired configuration.
2. Press the STORE key.
3. Use the left and right cursor keys, and the SOURCE (
▲ and ▼) or RANGE (▲ and ▼)
keys to specify the number of readings to store in the buffer.
4. Press ENTER. The asterisk (*) annunciator turns on to indicate data storage operation.
It will turn off when the storage is finished.
5. Turn on the output and (if necessary) trigger the unit to begin taking and storing
readings.
Recalling readings
Readings stored in the buffer are displayed by pressing the RECALL key. The source-
measure readings are positioned at the left side of the display, while the buffer location number
and timestamp are positioned at the right side.
Buffer location number
The buffer location number indicates the memory location of the source-measure reading.
Location #0000 indicates that the displayed source-measure reading is stored at the first mem-
ory location. If limit testing was performed, a “P” or an “F” will precede the buffer location
number to indicate the pass/fail result of the test. Limit testing is covered in Section 11.

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.