Keithley 6430 User Manual

Triggering 10-7
Bench defaults
The bench defaults are listed as follows. They are also denoted in Figure 10-1 by the “✛”
symbol.
• Arm-In Event = Immediate
• Trigger-In Source = Immediate
• Arm Count = 1
• Trigger Count = 1
• Trigger Delay = 0.0 sec
• Delay Action = 0.001 sec
• Source Trigger In Event = On
• Delay Trigger In Event = Off
• Measure Trigger In Event = Off
• Trigger Out Events = All Trigger Out Events are disabled (off)
• Arm Out Events = Off
• Event Detection Bypasses = Never (both layers)
When the output is turned ON, the SourceMeter will run in a continuous loop around the
trigger model. After each Measure Action, operation will continue at the top of the trigger
model. The SourceMeter can be returned to idle by turning the output OFF.
Operation summary
The trigger model is designed to offer versatility for the various source-measure applica-
tions. Typically, it allows you to perform a specified number of measurements at various source
levels.
For example, assume you want to perform three measurements each at two different
V-source levels (1V and 2V). To do this, set the arm count to two, the trigger count to three,
and use a 6-point Custom Sweep configured as follows:
P0000 = 1V
P0001 = 1V
P0002 = 1V
P0003 = 2V
P0004 = 2V
P0005 = 2V
When the sweep is started, operation falls into the Trigger Layer and performs three mea-
surements at the 1V source level. Operation then loops back into the Trigger Layer to perform
three measurements at the 2V source level. The six readings are stored in the buffer.
Note that after the sweep is finished, the SourceMeter does not return to idle. Operation con-
tinues at the top of the trigger model. Subsequent measurements are performed at the 2V level
and are not stored in the buffer.
For details on the Custom Sweep, see Section 9.

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.