Keithley 6430 User Manual

14-14 Status Structure
Measurement Event Register
The used bits of the Measurement Event Register (shown in Figure 14-6) are described as
follows:
• Bit B0, Limit 1 Fail (L1) — Set bit indicates that the Limit 1 test has failed.
• Bit B1, Low Limit 2 Fail (LL2) — Set bit indicates that the Low Limit 2 test has failed.
• Bit B2, High Limit 2 Fail (HL2) — Set bit indicates that the High Limit 2 test has
failed.
• Bit B3, Low Limit 3 Fail (LL3) — Set bit indicates that the Low Limit 3 test has failed.
• Bit B4, High Limit 3 Fail (HL3) — Set bit indicates that the High Limit 3 test has
failed.
• Bit B5, Limits Pass (LP) — Set bit indicates that all limit tests passed.
• Bit B6, Reading Available (RAV) — Set bit indicates that a reading was taken and
processed.
• Bit B7, Reading Overflow (ROF) — Set bit indicates that the volts or amps reading
exceeds the selected measurement range of the SourceMeter.
• Bit B8, Buffer Available (BAV) — Set bit indicates that there are at least two readings
in the buffer.
• Bit B9, Buffer Full (BFL) — Set bit indicates that the trace buffer is full.
• Bit B10 — Not used.
• Bit B11, Interlock Asserted (Int) — Set bit indicates that the interlock line is at digital
low (asserted). The source output can be turned on.
• Bit B12, Over Temperature (OT) — Set bit indicates that an over temperature condi-
tion exists. The source output cannot be turned on.
• Bit B13, Over Voltage Protection (OVP) — Set bit indicates that the source is being
limited at the programmed limit level.
• Bit B14, Compliance (Comp) — Set bit indicates that the source is in compliance.
• Bit B15 — Not used.

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.