Keithley 6430 User Manual

11-18 Limit Testing
3. Press MEAS V or MEAS I to select the desired measurement function, then choose the
desired measurement range.
Refer to the Basic source-measure procedure in Section 3 for more information.
Step 3: Configure limit tests.
Select and configure the following limit tests parameters as explained in Configuring limit
tests:
• Use DIGOUT to configure the Digital I/O port for SIZE, MODE, and AUTO CLEAR.
• Set your H/W LIMITS and S/W LIMITS parameters as desired.
• Set up PASS conditions for Digital I/O bit pattern and memory source location if using
source memory sweep.
• If using 3-bit port size, program the Digital I/O Line 4 EOT MODE for EOT or BUSY,
as appropriate.
Step 4: Turn output on.
Press the ON/OFF key to turn the output on (OUTPUT indicator turns on). The Source-
Meter will output the programmed bias level.
Step 5: Start testing process.
To enable the limit tests, press the LIMIT key. If the /SOT line of the Digital I/O is being
used by a handler, the testing process will not start until the handler sends a low-going pulse.
Otherwise, the testing process will start when LIMIT is pressed.
NOTE The “PASS” and “FAIL” messages indicate the status of each test cycle, with the fol-
lowing exceptions:
• When in the NORMAL or GUARD output-off state, the “OFF” message is dis-
played. The pass and fail conditions will be displayed as “P OFF” and “F OFF”
respectively.
• When in the ZERO output-off state, the “ZER” message is displayed. The pass
and fail conditions will be displayed as “P ZER” and “F ZER” respectively.
• If the source reaches the OVP (Over-Voltage Protection) limit, the “OVP” mes-
sage will be displayed. The pass and fail conditions will be displayed as “P OVP”
and “F OVP” respectively.
Step 6: Stop testing process.
The testing process can be terminated at any time by again pressing LIMIT. When using a
handler, the testing process will stop after the last DUT is tested.

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.