Keithley 6430 User Manual

Limit Testing 11-17
• EOT MODE — Use this menu item to control the operation of Digital I/O line 4 to act
as an EOT (End of Test) or BUSY signal:
- EOT — In 3-bit mode, automatically output a HI pulse on Digital I/O line 4 at end
of test. In 4-bit mode, EOT is not automatically controlled.
- /EOT — In 3-bit mode, automatically output a LO pulse on Digital I/O line 4 at
end of test. In 4-bit mode, this option is not available.
- BUSY — Set Digital I/O line 4 HI while unit is busy. With BUSY selected, the
unit behaves as if it is in 3-bit mode.
- /BUSY — Set Digital I/O line 4 LO while unit is busy. With /BUSY selected, the
unit behaves as if it is in 3-bit mode.
Performing limit tests
Perform the following steps to run limit tests:
Step 1: Configure test system.
As previously explained in Section 2, your test system could be as simple as connecting a
DUT to the SourceMeter or could employ the use of a handler for binning operations. Adding a
scanner to the test system allows you to test multi-element devices (such as resistor networks).
Make sure that the Digital I/O is configured appropriately for the handler you are using.
Step 2: Configure source-measure functions.
Configure the SourceMeter for the desired source-measure operations as follows:
1. Select the desired source function by pressing SOURCE V or SOURCE I.
2. Set the source level and compliance limit to the desired values.
CONFIG
LIMIT
DIGOUT
H/W
LIMITS
MODE
SIZE
FAIL
MODE
CONTROL
AUTO
CLEAR
S/W
LIMITS
PASS
EOT
MODE
LIM2,3
LIM5-12
CONTROL
HILIM
LOLIM
SRC MEM
LOC
DIG I/O
PATTERN
/EOT
EOT
/BUSY
BUSY
Figure 11-10
Limits configuration
menu tree

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.