Keithley 2306 User Manual

Safety Precautions
11/07
The following safety precautions should be observed before using this product and any associated instrumentation.
Although some instruments and accessories would normally be used with non-hazardous voltages, there are
situations where hazardous conditions may be present.
This product is intended for use by qualified personnel who recognize shock hazards and are familiar with the safety
precautions required to avoid possible injury. Read and follow all installation, operation, and maintenance
information carefully before using the product. Refer to the user documentation for complete product specifications.
If the product is used in a manner not specified, the protection provided by the product warranty may be impaired.
The types of product users are:
Responsible body is the individual or group responsible for the use and maintenance of equipment, for ensuring
that the equipment is operated within its specifications and operating limits, and for ensuring that operators are
adequately trained.
Operators use the product for its intended function. They must be trained in electrical safety procedures and proper
use of the instrument. They must be protected from electric shock and contact with hazardous live circuits.
Maintenance personnel perform routine procedures on the product to keep it operating properly, for example,
setting the line voltage or replacing consumable materials. Maintenance procedures are described in the user
documentation. The procedures explicitly state if the operator may perform them. Otherwise, they should be
performed only by service personnel.
Service personnel are trained to work on live circuits, perform safe installations, and repair products. Only properly
trained service personnel may perform installation and service procedures.
Keithley Instruments products are designed for use with electrical signals that are rated Measurement Category I
and Measurement Category II, as described in the International Electrotechnical Commission (IEC) Standard IEC
60664. Most measurement, control, and data I/O signals are Measurement Category I and must not be directly
connected to mains voltage or to voltage sources with high transient over-voltages. Measurement Category II
connections require protection for high transient over-voltages often associated with local AC mains connections.
Assume all measurement, control, and data I/O connections are for connection to Category I sources unless
otherwise marked or described in the user documentation.
Exercise extreme caution when a shock hazard is present. Lethal voltage may be present on cable connector jacks
or test fixtures. The American National Standards Institute (ANSI) states that a shock hazard exists when voltage
levels greater than 30V RMS, 42.4V peak, or 60VDC are present. A good safety practice is to expect that hazardous
voltage is present in any unknown circuit before measuring.
Operators of this product must be protected from electric shock at all times. The responsible body must ensure that
operators are prevented access and/or insulated from every connection point. In some cases, connections must be
exposed to potential human contact. Product operators in these circumstances must be trained to protect
themselves from the risk of electric shock. If the circuit is capable of operating at or above 1000 volts, no conductive
part of the circuit may be exposed.
Do not connect switching cards directly to unlimited power circuits. They are intended to be used with impedance-
limited sources. NEVER connect switching cards directly to AC mains. When connecting sources to switching cards,
install protective devices to limit fault current and voltage to the card.
Before operating an instrument, make sure the line cord is connected to a properly grounded power receptacle.
Inspect the connecting cables, test leads, and jumpers for possible wear, cracks, or breaks before each use.
When installing equipment where access to the main power cord is restricted, such as rack mounting, a separate
main input power disconnect device must be provided in close proximity to the equipment and within easy reach of
the operator.
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
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Keithley 2306 Specifications

General

Channels	2
Current Range (CH1/DC Output)	0 to 5 A
Operating Temperature	0°C to 50°C
Storage Temperature	-40°C to 70°C
Load Regulation	≤0.01% + 2 mV
Line Regulation	≤0.01% + 2 mV
Over Voltage Protection	Yes, settable
Over Current Protection	Yes, settable
Interface	GPIB, RS-232

Summary

WARRANTY

LIMITATION OF WARRANTY

Details exclusions and limitations of the warranty.

Safety Precautions

Shock Hazard Precautions

Details precautions for handling lethal voltages and identifying shock hazards.

Grounding and Cable Inspection

Emphasizes grounding for safety and inspecting cables for wear before use.

Service personnel

Defines requirements for service personnel performing installations and repairs.

Getting Started

General information

Provides general info including warranty, contact, safety symbols, inspection, and accessories.

Inspection

Details the procedure for checking the power supply for physical damage after unpacking.

Options and accessories

Lists available optional accessories for the power supply.

Power supply overview

Summarizes the capabilities of the dual-channel battery/charger simulator.

Remote display option

Explains the use of the optional remote display module for extended operation.

Power-up

Covers line power connection and the instrument's power-up sequence and self-tests.

Display modes

Describes the four display modes for voltage and current readings.

Default settings

Details factory default conditions and user-saved setup options.

Menu

Explains how to navigate the instrument's menu structure and access settings.

SCPI programming

Provides information on SCPI commands for remote operation and programming syntax.

Basic Power Supply Operation

Test connections

Explains how to connect the DUT to the power supply and DVM input.

Local sense

Describes connecting with local sense leads for 2-wire operation.

Outputting voltage and current

Details how to set and output voltage and current values.

Selecting proper current range

Explains how to select the appropriate current range for measurements.

Selecting current limit mode

Describes LIM and TRIP modes for handling current limit conditions.

Editing output voltage and current limit values

Provides steps to adjust output voltage and current limit values.

Reading back V and I

Covers the actual V and I display mode for measuring delivered voltage and current.

Sink operation

Explains using the power supply as a constant current load for dissipating power.

Pulse Current Measurements

Overview

Provides an overview of the pulse current measurement process and built-in measurements.

Trigger level

Sets the minimum pulse level for accurate pulse detection and avoids false triggers.

Integration times

Covers manual and automatic setting of integration periods for pulse measurements.

Pulse current measurement procedure

Step-by-step guide to perform pulse current measurements from the front panel.

Determining correct trigger level (pulse current)

Procedures to find an appropriate trigger level for accurate pulse detection.

SCPI programming — pulse current measurements

Documents SCPI commands for programming pulse current measurements.

Long Integration Measurements

Overview

Explains average current measurement over extended periods up to 60 seconds.

Trigger level

Specifies the minimum pulse level required for detection and measurement.

Trigger level range

Affects trigger level resolution for measurements on the 5A current range.

Long integration measurement procedure

Step-by-step guide for performing long integration current measurements.

SCPI programming

Lists SCPI commands for long integration measurements.

Relay Control

Overview

Summarizes how the power supply can control external relays.

Connections

Explains how to connect an external relay circuit to the power supply via the 9-pin D-SUB.

Controlling relays

Details how to control the external relay circuit using front panel menus.

SCPI programming — output relay control

Lists SCPI commands for controlling the output relays.

External Triggering (Model 2306-VS Only)

Overview

Describes additional triggering and voltage step capabilities specific to Model 2306-VS.

Model 2306-VS features

Lists key features including BNC connectors for triggering and handshaking.

Trigger connections

Explains the use of rear panel BNC connectors for trigger signals.

Commands

Details specific commands for Model 2306-VS external trigger operation.

GPIB Operation

Introduction

Describes IEEE-488 (GPIB) standards, SCPI, and protocol differences.

GPIB bus connections

Shows how to connect the power supply to the GPIB bus using IEEE-488 cables.

Setting the GPIB timeout for responses

Documents commands to set the GPIB timeout for instrument responses.

General bus commands

Documents common bus commands like REN, IFC, LLO, GTL, DCL, SDC, GET, SPE, SPD.

Programming syntax

Covers syntax for common commands and SCPI commands, including parameter types.

Status Structure

Overview

Provides an overview of the status registers and queues for monitoring instrument events.

Status byte and SRQ

Explains how the status byte register and SRQ generation work.

Clearing registers and queues

Lists commands to reset event/enable registers and clear queues.

Programming and reading registers

Explains how to program and read enable registers and other status registers.

Status byte and service request commands

Lists commands for programming and reading status byte and SRQ enable registers.

Common Commands

Overview

Introduces device commands common to all bus devices, defined by IEEE-488.2.

Command notes (IEEE-488.2 common commands and queries)

Provides notes on common commands like *IDN?, *OPC, *RCL, *RST, *SAV, *SRE, *STB?, *TRG, *TST?, *WAI.

Signal Oriented Measurement Commands

Overview

Summarizes high-level instructions for acquiring readings and controlling measurements.

Command notes (Signal oriented measurement commands and queries)

Provides notes on commands like :FETCh?, :READ?, and :MEASure?.

DISPlay, FORMat, and SYSTem

DISPlay subsystem

Covers SCPI commands for controlling the power supply's display functionality.

FORMat subsystem

Covers SCPI commands for configuring data format for readings transferred over the bus.

:SYSTem subsystem

Covers miscellaneous SCPI commands related to system settings.

SCPI Tables

SCPI command subsystems reference tables

Lists SCPI command summaries for various subsystems with page numbers.

Performance Verification

Introduction

Explains verification procedures for checking Model 2306 accuracy against specifications.

Verification test requirements

Outlines necessary conditions for performing verification tests: environment, warm-up, line voltage, etc.

Recommended test equipment

Lists recommended equipment and specifications for performing verification.

Verification limits

Explains how verification limits are calculated and the need for recalculation with test equipment uncertainty.

Performing the verification test procedures

Outlines the steps and tests for verifying performance accuracy.

Output voltage accuracy

Details the procedure to verify the accuracy of the Model 2306 output voltage.

Voltage readback accuracy

Details the procedure to verify the accuracy of Model 2306 voltage readback readings.

Compliance current accuracy

Details the procedure to verify compliance current accuracy using a resistor and DMM.

Current readback accuracy

Details the procedure to verify Model 2306 current readback accuracy.

Digital voltmeter input accuracy

Details the procedure to verify the accuracy of the Model 2306 digital voltmeter input.

Calibration

Introduction

Introduces calibration procedures using SCPI commands or front panel.

Environmental conditions

Specifies conditions for calibration: temperature, humidity, warm-up, and line power.

Calibration considerations

Outlines critical steps and warnings for performing calibration procedures.

Recommended calibration equipment

Lists recommended equipment and specifications for calibration procedures.

Front panel calibration

Provides a step-by-step procedure for calibrating the Model 2306 from the front panel.

Remote calibration

Outlines the procedure for performing calibration remotely via SCPI commands.

Changing the calibration code

Explains how to change the calibration code via front panel or remote commands.

Resetting the calibration code

Provides instructions for unlocking calibration and resetting the code if forgotten.

Disassembly

Introduction

Explains how to handle, clean, and disassemble the Model 2306.

Handling and cleaning

Precautions for handling PC boards to avoid contamination and damage.

Static sensitive devices

Details precautions for handling static-sensitive devices like CMOS.

Disassembly procedures

Step-by-step instructions for disassembling the instrument's main components.

Instrument reassembly

Reassembly instructions, emphasizing proper seating and grounding for safety.

Replaceable Parts

Ordering information

Details information required when ordering replacement parts.

Factory service

Outlines procedures for returning the instrument for repair or service.

Parts lists and component layouts

Refers to tables and drawings for parts lists and component layouts.

Specifications

Error and Status Messages

Error and status messages (all models)

Lists common error and status messages with their event types.

Error and status messages (Model 2306-VS only)

Lists specific error and status messages relevant to the Model 2306-VS.

Calibration Reference

Introduction

Introduces remote calibration commands, error messages, and calibration step detection.

Command summary

Summarizes calibration commands detailed in the appendix.

Miscellaneous commands

Covers commands for saving constants, locking calibration, and programming dates.

Detecting calibration errors

Discusses methods to detect calibration errors via error queue and status byte.

Detecting calibration step completion

Discusses methods (*OPC, *OPC?) to detect the completion of calibration steps.

Calibration Program

Introduction

Introduces a BASIC calibration program for Model 2306.

Computer hardware requirements

Lists required hardware for running calibration programs (PC, interface cards, cables).

Software requirements

Lists required computer software for calibration programs (QBasic, MS-DOS, ULD).

Calibration equipment

Lists essential calibration equipment: DMM and resistors.

General program instructions

Provides instructions for using the example calibration program.