Keithley 2280 Series, 2280S-32-6, 2280S-60-3 Reference Manual

tek.com/keithley

Series 2280
Precision Measurement DC Power Supplies

Reference Manual

077085503 / March 2019

*P077085503*

077085503

Precision DC Power Supply

Series 2280

Reference Manual

© 2019, Keithley Instruments, LLC

Cleveland, Ohio, U.S.A.

All rights reserved.

Any unauthorized reproduction, photocopy, or use of the information herein, in whole or in part,

without the prior written approval of Keithley Instruments, LLC, is strictly prohibited.

These are the original instructions in English.

All Keithley Instruments product names are trademarks or registered trademarks of Keithley

Instruments, LLC. Other brand names are trademarks or registered trademarks of their respective

holders.

Microsoft, Visual C++, Excel, and Windows are either registered trademarks or trademarks of

Microsoft Corporation in the United States and/or other countries.

Document number: 077085503 / March 2019

Safety precautions

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 nonhazardous voltages, there are situations where hazardous
conditions may be present.

This product is intended for use by 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 products are designed for use with electrical signals that are measurement, control, and data I/O connections, with low
transient overvoltages, and must not be directly connected to mains voltage or to voltage sources with high transient
overvoltages. Measurement Category II (as referenced in IEC 60664) connections require protection for high transient
overvoltages often associated with local AC mains connections. Certain Keithley measuring instruments may be connected to
mains. These instruments will be marked as category II or higher.

Unless explicitly allowed in the specifications, operating manual, and instrument labels, do not connect any instrument to mains.
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
30 V RMS, 42.4 V peak, or 60 VDC 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 V, 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, ensure that 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.

For maximum safety, do not touch the product, test cables, or any other instruments while power is applied to the circuit under
test. ALWAYS remove power from the entire test system and discharge any capacitors before: connecting or disconnecting
cables or jumpers, installing or removing switching cards, or making internal changes, such as installing or removing jumpers.

Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth)
ground. Always make measurements with dry hands while standing on a dry, insulated surface capable of withstanding the
voltage being measured.

For safety, instruments and accessories must be used in accordance with the operating instructions. If the instruments or
accessories are used in a manner not specified in the operating instructions, the protection provided by the equipment may be
impaired.

Do not exceed the maximum signal levels of the instruments and accessories. Maximum signal levels are defined in the
specifications and operating information and shown on the instrument panels, test fixture panels, and switching cards.

When fuses are used in a product, replace with the same type and rating for continued protection against fire hazard.
Chassis connections must only be used as shield connections for measuring circuits, NOT as protective earth (safety ground)

connections.
If you are using a test fixture, keep the lid closed while power is applied to the device under test. Safe operation requires the use

of a lid interlock.

If a screw is present, connect it to protective earth (safety ground) using the wire recommended in the user documentation.

The symbol on an instrument means caution, risk of hazard. The user must refer to the operating instructions located in the
user documentation in all cases where the symbol is marked on the instrument.

The symbol on an instrument means warning, risk of electric shock. Use standard safety precautions to avoid personal
contact with these voltages.

The symbol on an instrument shows that the surface may be hot. Avoid personal contact to prevent burns.

The symbol indicates a connection terminal to the equipment frame.

If this symbol is on a product, it indicates that mercury is present in the display lamp. Please note that the lamp must be
properly disposed of according to federal, state, and local laws.

The WARNING heading in the user documentation explains hazards that might result in personal injury or death. Always read
the associated information very carefully before performing the indicated procedure.

The CAUTION heading in the user documentation explains hazards that could damage the instrument. Such damage may
invalidate the warranty.

The CAUTION heading with the symbol in the user documentation explains hazards that could result in moderate or minor
injury or damage the instrument. Always read the associated information very carefully before performing the indicated
procedure. Damage to the instrument may invalidate the warranty.

Instrumentation and accessories shall not be connected to humans.
Before performing any maintenance, disconnect the line cord and all test cables.
To maintain protection from electric shock and fire, replacement components in mains circuits — including the power

transformer, test leads, and input jacks — must be purchased from Keithley. Standard fuses with applicable national safety
approvals may be used if the rating and type are the same. The detachable mains power cord provided with the instrument may
only be replaced with a similarly rated power cord. Other components that are not safety-related may be purchased from other
suppliers as long as they are equivalent to the original component (note that selected parts should be purchased only through
Keithley to maintain accuracy and functionality of the product). If you are unsure about the applicability of a replacement
component, call a Keithley office for information.

Unless otherwise noted in product-specific literature, Keithley instruments are designed to operate indoors only, in the following
environment: Altitude at or below 2,000 m (6,562 ft); temperature 0 °C to 50 °C (32 °F to 122 °F); and pollution degree 1 or 2.

To clean an instrument, use a cloth dampened with deionized water or mild, water-based cleaner. Clean the exterior of the
instrument only. Do not apply cleaner directly to the instrument or allow liquids to enter or spill on the instrument. Products that
consist of a circuit board with no case or chassis (e.g., a data acquisition board for installation into a computer) should never
require cleaning if handled according to instructions. If the board becomes contaminated and operation is affected, the board
should be returned to the factory for proper cleaning/servicing.

Safety precaution revision as of June 2017.

Introduction .............................................................................................................. 1-1

Table of contents

Welcome .............................................................................................................................. 1-1

Extended warranty ............................................................................................................... 1-1

Contact information .............................................................................................................. 1-1

Product documentation and drivers ..................................................................................... 1-2

Organization of manual sections .......................................................................................... 1-2

Key features ......................................................................................................................... 1-3

Standard accessories ........................................................................................................... 1-4

Optional accessories ............................................................................................................ 1-4

Available services ................................................................................................................ 1-5

General ratings ..................................................................................................................... 1-5

General operation .................................................................................................... 2-1

Front-panel overview ............................................................................................................ 2-1

Rear-panel overview ............................................................................................................ 2-3

Front-panel user interface .................................................................................................... 2-4

Home screen ................................................................................................ ............................. 2-4

Menu overview ........................................................................................................................ 2-14

Adjusting the backlight brightness and timer ........................................................................... 2-27

Installing the system ........................................................................................................... 2-28

Bumpers .................................................................................................................................. 2-28

Dimensions ............................................................................................................................. 2-29

Power the instrument on and off ............................................................................................. 2-34

Test connections ................................................................................................................ 2-37

Front-panel connector ............................................................................................................. 2-38

Rear-panel output mating connector ....................................................................................... 2-39

Two-wire local sense connection ............................................................................................ 2-39

Four-wire sense connection .................................................................................................... 2-40

Open leads detection .............................................................................................................. 2-42

Reversed sense leads ............................................................................................................. 2-43

Remote communications interfaces ................................................................................... 2-44

Supported remote interfaces ................................................................................................... 2-45

GPIB communications ............................................................................................................. 2-45

LAN communications .............................................................................................................. 2-48

USB communications .............................................................................................................. 2-64

How to install the Keithley I/O Layer ....................................................................................... 2-70

Set voltage and current limit .............................................................................................. 2-71

Constant voltage (CV) and constant current (CC) mode ......................................................... 2-72

Select a measurement function ......................................................................................... 2-74

Select a specific measurement range ................................................................................ 2-75

Selecting a specific measurement range ................................................................................ 2-75

Using autoranging for current measurements ......................................................................... 2-77

Protection ........................................................................................................................... 2-78

Table of contents Series 2280 Precision DC Power Supply Reference Manual

Overvoltage protection ............................................................................................................ 2-78

Overcurrent protection ............................................................................................................ 2-79

Overtemperature protection .................................................................................................... 2-80

Overprotection error ................................................................................................................ 2-81

Maximum voltage limits ........................................................................................................... 2-82

Saving setups ..................................................................................................................... 2-83

Save a user setup ................................................................................................................... 2-83

Recall a user setup ................................................................................................................. 2-84

Specify a default setup ............................................................................................................ 2-85

Using the event log ............................................................................................................ 2-85

Information provided for each event log entry ......................................................................... 2-85

Save the event log to an external flash drive .......................................................................... 2-86

Clear the event log .................................................................................................................. 2-86

System information ............................................................................................................ 2-86

Instrument sounds .............................................................................................................. 2-87

Resets ................................................................................................................................ 2-87

Reset the instrument ............................................................................................................... 2-88

Reset default values ................................................................................................................ 2-88

Functions and features ............................................................................................ 3-1

Instrument access ................................................................................................................ 3-1

Changing the instrument access mode ..................................................................................... 3-1

Changing the password ............................................................................................................ 3-2

Graph ................................................................................................................................... 3-2

Changing the window position and zoom .................................................................................. 3-3

Adjusting the scale and offset of the Y-axis .............................................................................. 3-4

Output delay, slew rate, and source delay ........................................................................... 3-5

Output delay .............................................................................................................................. 3-6

Slew rate ................................ ................................................................ ................................... 3-6

Source delay ............................................................................................................................. 3-7

Data buffer ........................................................................................................................... 3-8

Effects of reset and power cycle on buffer ................................................................................ 3-8

Buffer fill status .......................................................................................................................... 3-9

Setting reading buffer size and buffer mode.............................................................................. 3-9

Viewing and saving buffer content .......................................................................................... 3-12

Clearing the buffer ................................................................................................................... 3-18

Digital I/O ........................................................................................................................... 3-19

Digital I/O port ......................................................................................................................... 3-19

Configuring digital I/O lines ..................................................................................................... 3-23

Trigger model ..................................................................................................................... 3-25

Idle and initiate ........................................................................................................................ 3-26

Arm layer ................................................................................................................................. 3-26

Trigger layer ............................................................................................................................ 3-26

Source, source delay, and measure actions ........................................................................... 3-27

Counter ................................................................................................................................... 3-27

Meter complete ....................................................................................................................... 3-27

Running the trigger model ....................................................................................................... 3-28

Level trigger ....................................................................................................................... 3-30

Configuring a voltage level trigger ........................................................................................... 3-30

Configuring a current level trigger ........................................................................................... 3-32

Series 2280 Precision DC Power Supply Reference Manual Table of contents

List operation ...................................................................................................................... 3-34

Configuring a list ..................................................................................................................... 3-35

Importing a list from an external USB flash drive .................................................................... 3-37

Exporting a list to an external USB flash drive ........................................................................ 3-38

Configuring and running a list.................................................................................................. 3-38

Aborting a list .......................................................................................................................... 3-49

Sink operation .................................................................................................................... 3-50

Measurement optimization ...................................................................................... 4-1

Introduction .......................................................................................................................... 4-1

Optimizing either measurement accuracy or speed ............................................................ 4-1

Resolution ................................................................................................................................. 4-2

NPLC ........................................................................................................................................ 4-3

Autozero measurements ........................................................................................................... 4-5

Displayed digits ......................................................................................................................... 4-6

Filtering measurement data....................................................................................................... 4-7

Math calculations that you can apply to measurements .................................................... 4-11

mx+b ....................................................................................................................................... 4-11

Setting mx+b math operations ................................................................................................ 4-12

Relative offset .................................................................................................................... 4-13

Establishing a relative offset value .......................................................................................... 4-13

Displayed measurements................................................................................................... 4-15

Select the source of readings .................................................................................................. 4-17

Application examples .............................................................................................. 5-1

Simple voltage output and current measurement ................................................................ 5-1

Equipment required ................................................................................................................... 5-1

Set up remote communications ................................................................................................. 5-1

Device connections ................................................................................................................... 5-2

Set the voltage and current limit ................................................................................................ 5-2

Configure and execute a 10-step linear list sweep .............................................................. 5-4

Equipment required ................................................................................................................... 5-4

Set up remote communications ................................................................................................. 5-4

Device connections ................................................................................................................... 5-4

Configure a 10-step linear list sweep ........................................................................................ 5-5

Execute a 10-step linear list sweep ........................................................................................... 5-6

Perform a fast current load measurement ........................................................................... 5-7

Equipment required ................................................................................................................... 5-7

Set up remote communications ................................................................................................. 5-7

Device connections ................................................................................................................... 5-8

Measure the fast current load changes ................................................................................... 5-10

Introduction to SCPI commands ............................................................................. 6-1

Introduction to SCPI ............................................................................................................. 6-1

Command messages ................................................................................................................ 6-1

Command execution rules......................................................................................................... 6-2

SCPI command programming notes .................................................................................... 6-2

SCPI command formatting ........................................................................................................ 6-2

Using the SCPI command reference ......................................................................................... 6-5

Table of contents Series 2280 Precision DC Power Supply Reference Manual

SCPI command reference ........................................................................................ 7-1

Common commands ............................................................................................................ 7-1

*CLS .......................................................................................................................................... 7-2

*ESE ......................................................................................................................................... 7-3

*ESR? ....................................................................................................................................... 7-4

*IDN? ........................................................................................................................................ 7-4

*OPC ......................................................................................................................................... 7-5

*LANG? ..................................................................................................................................... 7-6

*RCL ......................................................................................................................................... 7-6

*RST ......................................................................................................................................... 7-7

*SAV ......................................................................................................................................... 7-7

*SRE ......................................................................................................................................... 7-8

*STB? ........................................................................................................................................ 7-8

*TRG ......................................................................................................................................... 7-9

*TST? ...................................................................................................................................... 7-10

*WAI ........................................................................................................................................ 7-10

:ABORt[n] ................................................................................................................................ 7-11

:CONFigure[n]:<function> ....................................................................................................... 7-12

:FETCh[n]? .............................................................................................................................. 7-13

:FORMat:ELEMents ................................................................................................................ 7-14

:FORCe:TRIGger .................................................................................................................... 7-15

:MEASure[n]:<function>? ........................................................................................................ 7-16

:READ[n]? ............................................................................................................................... 7-18

ARM subsystem ................................................................................................................. 7-19

:ARM[:SEQuence[n]]:COUNt .................................................................................................. 7-19

:ARM[:SEQuence[n]]:SOURce ................................................................................................ 7-20

CALCulate subsystem ........................................................................................................ 7-21

:CALCulate[1]:<function>:FORMat .......................................................................................... 7-21

:CALCulate[1]:<function>:KMATh:MBFactor ........................................................................... 7-22

:CALCulate[1]:<function>:KMATh:MMFactor .......................................................................... 7-23

:CALCulate[1]:<function>:KMATh:MUNits............................................................................... 7-25

:CALCulate[1]:<function>:STATe ............................................................................................ 7-26

:CALCulate2:DATA? ............................................................................................................... 7-27

:CALCulate2:FORMat ............................................................................................................. 7-28

:CALCulate2:FORMat:ELEMents ............................................................................................ 7-30

:CALCulate2:FUNCtion ........................................................................................................... 7-31

:CALCulate2:IMMediate .......................................................................................................... 7-32

:CALCulate2:STATe ................................................................................................................ 7-34

CALibration subsystem ...................................................................................................... 7-35

:CALibration:PROTected:CANCel ........................................................................................... 7-35

:CALibration:PROTected:CODE ............................................................................................. 7-36

:CALibration:PROTected:COUNt? .......................................................................................... 7-36

:CALibration:PROTected:DATA? ............................................................................................ 7-37

:CALibration:PROTected:DATE .............................................................................................. 7-38

:CALibration:PROTected[:DC[n]]:STEP<step> ....................................................................... 7-39

:CALibration:PROTected[:DC[n]]:STEP<step>:DATA ............................................................. 7-41

:CALibration:PROTected:SAVE .............................................................................................. 7-43

:CALibration:PROTected:STATe ............................................................................................. 7-44

Digital subsystem ............................................................................................................... 7-45

:DIGital:LINE<n>:FUNCtion .................................................................................................... 7-45

:DIGital:LINE<n>:MANual:INPut:DATA? ................................................................................. 7-46

DISPlay subsystem ............................................................................................................ 7-47

:DISPlay:BRIGhtness .............................................................................................................. 7-47

:DISPlay:CLEar ....................................................................................................................... 7-48

Series 2280 Precision DC Power Supply Reference Manual Table of contents

:DISPlay:SCREen ................................................................................................................... 7-49

:DISPlay:USER:TEXT[:DATA] ................................................................................................. 7-50

INITiate subsystem ............................................................................................................ 7-51

:INITiate[n]:CONTinuous ......................................................................................................... 7-51

:INITiate[n][:IMMediate] ........................................................................................................... 7-52

MMEMory subsystem ......................................................................................................... 7-52

:MMEMory:LOAD:SETup ................................................................ ........................................ 7-52

:MMEMory:SAVE:SETup ........................................................................................................ 7-53

OUTPut subsystem ............................................................................................................ 7-54

:OUTPut:DELay:FALLing ........................................................................................................ 7-54

:OUTPut:DELay:RISing ........................................................................................................... 7-55

:OUTPut:DELay:STATe .......................................................................................................... 7-56

:OUTPut:PROTection:CLEar................................................................................................... 7-57

:OUTPut:PROTection:TRIPped?[<channel>] .......................................................................... 7-58

:OUTPut[:STATe] .................................................................................................................... 7-59

SENSe subsystem ............................................................................................................. 7-60

:SENSe[n]:FUNCtion ............................................................................................................... 7-60

:SENSe[n]:<function>:AVERage:COUNt ................................................................................ 7-61

:SENSe[n]:<function>:AVERage[:STATe] ............................................................................... 7-62

:SENSe[n]:<function>:AVERage:TCONtrol ............................................................................. 7-63

:SENSe[n]:<function>:AVERage:WINDow .............................................................................. 7-64

:SENSe[n]:<function>:DIGits ................................................................................................... 7-65

:SENSe[n]:<function>:NPLCycles ........................................................................................... 7-66

:SENSe[n]:<function>:RANGe ................................................................................................ 7-67

:SENSe[n]:<function>:RANGe:AUTO ..................................................................................... 7-69

:SENSe[n]:<function>:REFerence ........................................................................................... 7-70

:SENSe[n]:<function>:REFerence:ACQuire ............................................................................ 7-71

:SENSe[n]:<function>:REFerence:STATe .............................................................................. 7-72

:SENSe[n]:<function>:RESolution ........................................................................................... 7-73

SOURce subsystem ........................................................................................................... 7-74

[:SOURce[n]]:DELay ............................................................................................................... 7-74

[:SOURce[n]]:DELay:STATe ................................................................................................... 7-75

[:SOURce[n]]:<function>:PROTection[:LEVel] ........................................................................ 7-76

[:SOURce[n]]:<function>[:LEVel][:IMMediate][:AMPLitude] ..................................................... 7-77

[:SOURce[n]]:VOLTage:LIMit[:AMPLitude] ............................................................................. 7-78

[:SOURce[n]]:VOLTage:SLEW:RISing .................................................................................... 7-79

[:SOURce[n]]:VOLTage:SLEW:FALLing ................................................................................. 7-80

[:SOURce[n]]:LIST<listNumber>:<element> ........................................................................... 7-81

[:SOURce[n]]:LIST<listNumber>:<element>:APPend ............................................................. 7-82

[:SOURce[n]]:LIST<listNumber>:<element>:POINts? ............................................................. 7-83

[:SOURce[n]]:LIST:END:ZERO ............................................................................................... 7-84

[:SOURce[n]]:LIST:HTIMe ....................................................................................................... 7-84

[:SOURce[n]]:LIST:LOAD:USB ............................................................................................... 7-85

[:SOURce[n]]:LIST:MCOMPlete .............................................................................................. 7-86

[:SOURce[n]]:LIST:RCL .......................................................................................................... 7-87

[:SOURce[n]]:LIST:SAVE:INTernal ......................................................................................... 7-90

[:SOURce[n]]:LIST:SAVE:USB ................................................................................................ 7-90

[:SOURce[n]]:LIST:STATe ...................................................................................................... 7-91

STATus subsystem ............................................................................................................ 7-95

:STATus:MEASurement[:EVENt]? .......................................................................................... 7-95

:STATus:MEASurement:ENABle ............................................................................................ 7-95

:STATus:MEASurement:INSTrument[:EVENt]? ...................................................................... 7-96

:STATus:MEASurement:INSTrument:ENABle ........................................................................ 7-97

:STATus:MEASurement:INSTrument:ISUMmary[:EVENt]? .................................................... 7-98

:STATus:MEASurement:INSTrument:ISUMmary:ENABle ...................................................... 7-99

:STATus:MEASurement:INSTrument:ISUMmary:CONDition? .............................................. 7-100

Table of contents Series 2280 Precision DC Power Supply Reference Manual

:STATus:OPERation[:EVENt]? .............................................................................................. 7-100

:STATus:OPERation:ENABle ................................................................................................ 7-101

:STATus:OPERation:INSTrument[:EVENt]? ......................................................................... 7-101

:STATus:OPERation:INSTrument:ENABle ........................................................................... 7-102

:STATus:OPERation:INSTrument:ISUMmary[:EVENt]? ....................................................... 7-103

:STATus:OPERation:INSTrument:ISUMmary:ENABle .......................................................... 7-104

:STATus:OPERation:INSTrument:ISUMmary:CONDition? ................................................... 7-105

:STATus:PRESet .................................................................................................................. 7-105

:STATus:QUEStionable[:EVENt]? ......................................................................................... 7-106

:STATus:QUEStionable:ENABle ........................................................................................... 7-107

:STATus:QUEStionable:INSTrument[:EVENt]?..................................................................... 7-107

:STATus:QUEStionable:INSTrument:ENABle ....................................................................... 7-108

:STATus:QUEStionable:INSTrument:ISUMmary[:EVENt]? ................................................... 7-109

:STATus:QUEStionable:INSTrument:ISUMmary:ENABle ..................................................... 7-109

:STATus:QUEStionable:INSTrument:ISUMmary:CONDition? .............................................. 7-110

SYSTem subsystem ......................................................................................................... 7-111

:SYSTem:AZERo[n][:STATe] ................................................................................................ 7-111

:SYSTem:BEEPer:ERRor[:STATe] ....................................................................................... 7-112

:SYSTem:COMMunication:ABORt ........................................................................................ 7-113

:SYSTem:COMMunication:LAN:CONFigure ......................................................................... 7-114

:SYSTem:COMMunication:LAN:MACaddress? ..................................................................... 7-115

:SYSTem:DATE .................................................................................................................... 7-115

:SYSTem:ERRor? ................................................................................................................. 7-116

:SYSTem:ERRor:CLEar ........................................................................................................ 7-116

:SYSTem:ERRor:CODE? ...................................................................................................... 7-117

:SYSTem:ERRor:COUNt?..................................................................................................... 7-117

:SYSTem:EVENtlog:SAVE .................................................................................................... 7-118

:SYSTem:GPIB:ADDRess..................................................................................................... 7-118

:SYSTem:KCLick .................................................................................................................. 7-119

:SYSTem:LOCal .................................................................................................................... 7-120

:SYSTem:LFRequency? ....................................................................................................... 7-121

:SYSTem:PASSword:LOCK .................................................................................................. 7-121

:SYSTem:PASSword:MODE ................................................................................................. 7-122

:SYSTem:PASSword:NEW ................................................................................................... 7-122

:SYSTem:PASSword:UNLock ................................................................ ............................... 7-123

:SYSTem:POSetup:STATe ................................................................................................... 7-124

:SYSTem:PRESet ................................................................................................................. 7-124

:SYSTem:RWLock ................................................................................................................ 7-125

:SYSTem:TIME ..................................................................................................................... 7-126

:SYSTem:VERSion? ............................................................................................................. 7-126

TRACe subsystem ........................................................................................................... 7-127

:DATA[n]:CLEar .................................................................................................................... 7-127

:DATA[n]:CLEar:AUTO ......................................................................................................... 7-127

:DATA[n]:DATA? ................................................................................................................... 7-128

:DATA[n]:DATA:SELected?................................................................................................... 7-130

:DATA[n]:FEED ..................................................................................................................... 7-132

:DATA[n]:FEED:CONTrol ...................................................................................................... 7-133

:DATA[n]:POINts ................................................................................................................... 7-134

:DATA[n]:POINts:ACTual? .................................................................................................... 7-134

:TRACe[n]:CLEar .................................................................................................................. 7-135

:TRACe[n]:CLEar:AUTO ....................................................................................................... 7-135

:TRACe[n]:DATA? ................................................................................................................. 7-136

:TRACe[n]:DATA:SELected? ................................................................................................ 7-138

:TRACe[n]:FEED ................................................................................................................... 7-140

:TRACe[n]:FEED:CONTrol .................................................................................................... 7-141

:TRACe[n]:POINts ................................................................................................................. 7-142

:TRACe[n]:POINts:ACTual? .................................................................................................. 7-142

:TRACe[n]:SAVE ................................................................................................................... 7-143

:TRACe[n]:TRIGger:CURRent:DIRection .............................................................................. 7-144

Series 2280 Precision DC Power Supply Reference Manual Table of contents

:TRACe[n]:TRIGger:CURRent[:LEVel] .................................................................................. 7-144

:TRACe[n]:TRIGger:CURRent:STATe .................................................................................. 7-145

:TRACe[n]:TRIGger:OCCur? ................................................................................................. 7-146

:TRACe[n]:TRIGger:OFFSet ................................................................................................. 7-146

:TRACe[n]:TRIGger:VOLTage:DIRection .............................................................................. 7-147

:TRACe[n]:TRIGger:VOLTage[:LEVel] .................................................................................. 7-147

:TRACe[n]:TRIGger:VOLTage:STATe .................................................................................. 7-148

TRIGger subsystem ......................................................................................................... 7-149

:TRIGger[:SEQuence[n]]:COUNt ........................................................................................... 7-149

:TRIGger[:SEQuence[n]]:SAMPle:COUNt ............................................................................. 7-150

:TRIGger[:SEQuence[n]]:SOURce ........................................................................................ 7-151

Troubleshooting guide ............................................................................................ 8-1

Introduction .......................................................................................................................... 8-1

Contacting support ............................................................................................................... 8-1

What to do if the power supply does not turn on ................................................................. 8-2

LAN troubleshooting suggestions ........................................................................................ 8-3

Error summary ..................................................................................................................... 8-4

Next steps ................................................................................................................. 9-1

Additional Series 2280 information ...................................................................................... 9-1

Maintenance ................................ ............................................................................. A-1

Introduction .......................................................................................................................... A-1

Line fuse replacement .......................................................................................................... A-1

Upgrading the firmware ........................................................................................................ A-2

From the front panel .................................................................................................................. A-3

Perform DIN VDE 701 test ................................................................................................... A-4

Cleaning the front-panel display .......................................................................................... A-4

Verification ............................................................................................................... B-1

Overview .............................................................................................................................. B-1

Test record ........................................................................................................................... B-2

DC voltage setting accuracy with remote sense ........................................................................ B-3

DC voltage setting accuracy without remote sense ................................................................... B-4

DC voltage readback accuracy with remote sense ................................................................... B-5

DC voltage readback accuracy without remote sense .............................................................. B-6

DC voltage load regulation ........................................................................................................ B-7

DC overvoltage protection ......................................................................................................... B-8

DC current accuracy ................................................................................................................. B-9

DC current readback accuracy ................................................................................................ B-10

DC voltage line regulation ................................................................ ....................................... B-13

DC current line regulation........................................................................................................ B-14

DC current load regulation ...................................................................................................... B-14

DC overcurrent protection ....................................................................................................... B-15

Voltage noise at 20 MHz ......................................................................................................... B-16

Table of contents Series 2280 Precision DC Power Supply Reference Manual

Current noise at 20 MHz, 1 Ω load .......................................................................................... B-16

Performance verification procedures ................................................................................. B-17

Performance verification conditions ........................................................................................ B-17

Required equipment ................................................................................................................ B-18

Check DC voltage setting readback accuracy with remote sense ........................................... B-18

Check DC voltage setting accuracy with remote sense .......................................................... B-21

Check DC voltage readback accuracy without remote sense ................................................. B-23

Check DC voltage line regulation ............................................................................................ B-25

Check DC voltage load regulation ........................................................................................... B-27

Check DC overvoltage protection ............................................................................................ B-28

Check DC current accuracy .................................................................................................... B-29

Check DC current readback accuracy (10 A and 1 A ranges) ................................................. B-31

Check DC current readback accuracy (100 mA and 10 mA ranges) ....................................... B-33

Check DC current line regulation ............................................................................................ B-35

Check DC current load regulation ........................................................................................... B-37

Check overcurrent protection .................................................................................................. B-38

Check voltage noise (20 MHz) ................................................................................................ B-39

Check current noise (20 MHz) ................................................................................................. B-41

Calibration and adjustment ..................................................................................... C-1

Overview .............................................................................................................................. C-1

Environmental conditions ..................................................................................................... C-1

Warmup period .......................................................................................................................... C-2

Line power................................................................................................................................. C-2

Calibration considerations .................................................................................................... C-2

Calibration cycle ........................................................................................................................ C-2

Required equipment .................................................................................................................. C-3

Characterization shunts ............................................................................................................ C-4

Calibration connection.......................................................................................................... C-6

Voltage calibration connections................................................................................................. C-7

Current calibration connections ................................................................................................. C-8

Front-panel calibration procedure ...................................................................................... C-10

Voltage calibration ................................................................................................................... C-11

Low-current calibration ............................................................................................................ C-12

High-current calibration ........................................................................................................... C-13

Saving calibration constants from the front panel.................................................................... C-15

Remote calibration procedure ............................................................................................ C-16

Remote voltage calibration ...................................................................................................... C-17

Remote low-current calibration ................................................................................................ C-18

Remote high-current calibration .............................................................................................. C-20

Saving calibration constants using SCPI commands .............................................................. C-23

Configure the calibration date ................................................................................................. C-23

Exit the calibration procedure using SCPI commands ............................................................ C-24

Change the calibration password ....................................................................................... C-24

Calibration constants .......................................................................................................... C-25

Status model ............................................................................................................ D-1

Overview .............................................................................................................................. D-1

Programming and reading registers ..................................................................................... D-5

Programming enable registers .................................................................................................. D-5

Series 2280 Precision DC Power Supply Reference Manual Table of contents

Reading the registers ................................................................................................................ D-6

Clearing the registers ........................................................................................................... D-6

Status byte and service request ........................................................................................... D-7

Status Byte Register ................................................................................................................. D-7

Service Request Enable Register ............................................................................................. D-9

Status register sets .............................................................................................................. D-9

Register bit descriptions ............................................................................................................ D-9

Event registers ........................................................................................................................ D-20

Event enable registers ............................................................................................................ D-20

Condition registers .................................................................................................................. D-20

Queues ............................................................................................................................... D-20

Output queue .......................................................................................................................... D-21

Error queue ............................................................................................................................. D-21

Serial polling and SRQ ....................................................................................................... D-21

Status model programming examples ............................................................................... D-22

SRQ when reading buffer becomes full ................................................................................... D-22

SRQ when trigger model is finished ........................................................................................ D-23

In this section:

Welcome ...................................................................................1-1

Extended warranty ....................................................................1-1

Contact information ...................................................................1-1

Product documentation and drivers ..........................................1-2

Organization of manual sections ...............................................1-2

Key features ................................................................ ..............1-3

Standard accessories ...............................................................1-4

Optional accessories .................................................................1-4

Available services .....................................................................1-5

General ratings .........................................................................1-5

Section 1

Introduction

Welcome

Thank you for choosing a Keithley Instruments product. The Series 2280 Precision DC Power Supply
is a high-sensitivity, low-noise, programmable instruments that source low noise, stable voltage, and
can monitor load currents over a wide dynamic range, from amperes to nanoamperes.

With a high-resolution, 4.3-inch TFT color display, numerous parameters describing the state of the
instrument are displayed to enable you to get the most information from your measurements.

Extended warranty

Additional years of warranty coverage are available on many products. These valuable contracts
protect you from unbudgeted service expenses and provide additional years of protection at a fraction
of the price of a repair. Extended warranties are available on new and existing products. Contact your
local Keithley Instruments office, sales partner, or distributor for details.

Contact information

If you have any questions after you review the information in this documentation, please contact your
local Keithley Instruments office, sales partner, or distributor. You can also call the corporate
headquarters of Keithley Instruments (toll-free inside the U.S. and Canada only) at 1-800-935-5595,
or from outside the U.S. at [phone]. For worldwide contact numbers, visit the Keithley

Instruments website (tek.com/keithley).

Section 1: Introduction Series 2280 Precision DC Power Supply Reference Manual

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Product documentation and drivers

The following documentation and drivers for the Series 2280 are available for download from the

Keithley Instruments support website (tek.com/support).

Quick Start Guide: Provides unpacking instructions, describes basic connections, reviews basic

operation information, and provides a quick test procedure to ensure the instrument is
operational.

Reference Manual: Includes advanced operation topics, maintenance information,

troubleshooting procedures, and in-depth descriptions of programming commands.

Accessories information: Documentation for accessories that are available for the Series 2280.
Drivers and release notes: IVI Instrument Driver, National Instruments LabVIEW™ driver, and

related release notes.

Organization of manual sections

The information in this manual is organized into the following major categories:

General operation: Describes the components of the instrument and basic operation.
Functions and features: Describes features and functions, such as measure operations, list

mode, reading buffers, triggering, the digital I/O port, graph function, output delay, and slew rate.

Measurement optimization: Describes best practices and recommended procedures that can

increase measurement speed, accuracy, and sensitivity.

Application examples: Provides set-ups for applications, such as for low-current measurements,

and list mode operations.

Introduction to SCPI commands: Describes how to control the instrument using SCPI

commands.

SCPI command reference: Contains programming notes and an alphabetical listing of all SCPI

commands available for the Series 2280.

Troubleshooting guide: Describes the event log and basic LAN troubleshooting.
Next steps: Contains sources of additional information.
Maintenance: Contains information about instrument maintenance, including line fuse

replacement and firmware upgrades.

Verification: Contains performance verification procedures.
Calibration and adjustment: Contains information about instrument calibration from the front

panel and using SCPI commands.

Status model: Describes the Series 2280 status model.

Series 2280 Precision DC Power Supply Reference Manual Section 1: Introduction

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Key features

Model

Description

2280S-32-6

Precision measurement DC power supply. 32 V, 6 A

2280S-60-3

Precision measurement DC power supply. 60 V, 3.2 A

The Series 2280 has the following features:

 High current resolution and sensitivity to measure a wide range of load currents
 6½-digit measurement resolution to enable a wide range of measurements while on one current range
 Fast current measurements to test or study load current pulses as narrow as 100 μs
 Linear mode, low noise output
 Color TFT display with icon-based and soft key user interface
 Data logging and analysis with graphical display and statistics for trend analysis
 Up to nine groups of user-definable lists with up to 99 steps for each list
 GPIB, USB-TMC, and LAN LXI interfaces for automated test development
 Filtering to reduce noise on load current readings
 Digital I/O for rich trigger functions
 Direct parameter entry using the numeric keypad, soft keys, or the navigation wheel
 Front-panel USB-A connector for flash-drive support
 Front and rear inputs with remote sense connections on the rear panel connector
 Overcurrent, overvoltage, and over temperature protection
 Compact, 2U, half rack, stackable form factor fits easily in a test rack

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Standard accessories

Accessory

Part number

Model 2280-001 Output Mating Connector

2280-001

Standard LAN crossover cable

N/A

Quick start guide

For details, see the following table.

Certification of Calibration

Varies

Languages

Part number

English

0713190xx*

Simplified Chinese

0713260xx*

Traditional Chinese

0713261xx*

French

0713254xx*

Spanish

0713257xx*

Italian

0713255xx*

German

0713256xx*

Japanese

0713258xx*

Portuguese

0713259xx*

Korean

0713262xx*

Russian

0713263xx*

* Where xx represents the revision number.

Optional accessory

Part number

Model 2280-001 Output Mating Connector

2280-001

USB Cable Type A to B, 1 m (3.3 ft)

USB-B-1

Standard LAN crossover cable

N/A

IEEE-488.2 Interface Board for the PCI Bus

KPCI-488LPA

Double Shielded Premium IEEE-488 Interface Cables, 0.5m (1.6 ft)

7007-05

Double Shielded Premium IEEE-488 Interface Cables, 1m (3.2 ft)

7007-1

Double Shielded Premium IEEE-488 Interface Cables, 2m (6.5 ft)

7007-2

Double Shielded Premium IEEE-488 Interface Cables, 3m (10 ft)

7007-3

Double Shielded Premium IEEE-488 Interface Cables, 4m (13 ft)

7007-4

Dual Fixed Rack-Mount Kit for 2280S and 2281S instruments

4299-14

Model 2450-TLINK Trigger Link Cable

131909200

You will get one of the following quick start guides.

Optional accessories

Series 2280 Precision DC Power Supply Reference Manual Section 1: Introduction

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Available services

Service

Model Number

1 additional year of factory warranty beyond the 3-Year factory
warranty (total of 4 years)

2280S-32-6-EW
2280S-60-3-EW

2 additional years of factory warranty beyond the 3-Year factory
warranty (total of 5 years)

2280S-32-6-5Y-EW
2280S-60-3-5Y-EW

KeithleyCare® 3 Year Standard Calibration Plan

C/2280S-32-6-3Y-STD
C/2280S-60-3-3Y-STD

KeithleyCare 3 Year Calibration w/Data Plan

C/2280S-32-6-3Y-DATA
C/2280S-60-3-3Y-DATA

KeithleyCare 5 Year Standard Calibration Plan

C/2280S-32-6-5Y-STD
C/2280S-60-3-5Y-STD

KeithleyCare 5 Year Calibration w/Data Plan

C/2280S-32-6-5Y-DATA
C/2280S-60-3-5Y-DATA

KeithleyCare 3 Year ISO 17025 Calibration Plan

C/2280S-32-6-3Y-1702
C/2280S-60-3-3Y-1702

KeithleyCare 5 Year ISO 17025 Calibration Plan

C/2280S-32-6-5Y-1702
C/2280S-60-3-5Y-1702

Category

Specification

Supply voltage range

Four ranges: 100 V, 120 V, 220 V, 240 V and each range capable of ±10%
tolerance, 50 Hz or 60 Hz.
Selectable by the line-voltage selector switch on the rear panel.

Output connections

See Test connections (on page 2-37).

Environmental conditions

For indoor use only.

Altitude: Maximum 2000 meters (6562 feet) above sea level.
Operating: 0 °C to 40 °C, full accuracy to 80% relative humidity at up to 35 °C,

noncondensing.
Storage: –20 °C to 70 °C, 5% to 95% relative humidity at up to 40 °C and 5% to
60% relative humidity above 40 °C up to 70 °C.

Pollution degree: 2.

Model

100 VAC/120 VAC source

220 VAC/240 VAC source

2280S-32-6

250 V, 5 A, Time delay

250 V, 2.5 A, Time delay

2280S-60-3

250 V, 5 A, Time delay

250 V, 2.5 A, Time delay

For the current list of available services and accessories, upgrades, and options for your instrument,
visit tek.com/keithley.

General ratings

The Series 2280 instrument's general ratings and connections are listed in the following table.

Line fuse characteristics are shown in the following table.

In this section:

Front-panel overview ................................................................2-1

Rear-panel overview .................................................................2-3

Front-panel user interface .........................................................2-4

Installing the system ...............................................................2-28

Test connections .....................................................................2-37

Remote communications interfaces ........................................2-44

Set voltage and current limit....................................................2-71

Select a measurement function ...............................................2-74

Select a specific measurement range .....................................2-75

Protection ................................................................................2-78

Saving setups .........................................................................2-82

Using the event log .................................................................2-85

System information .................................................................2-86

Instrument sounds ..................................................................2-87

Resets .....................................................................................2-87

POWER switch

Turns the instrument on or off. To turn the instrument on, press
the power switch so that it is in the on position (|). To turn it off,
press the power switch so that it is in the off position (O).

Section 2

General operation

Front-panel overview

The front panel of Series 2280 is shown below. Descriptions of the controls on the front panel follow
the figure.

Figure 1: Series 2280 front panel

Section 2: General operation Series 2280 Precision DC Power Supply Reference Manual

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HOME key

Returns the display to the home screen.

MENU key

Opens the main menu. Select the icons using the navigation
control and pressing the ENTER key to open source, measure,
views, trigger, and system screens. For details, see Menu

overview (on page 2-14).

USB port

Saves reading buffer data to a USB flash drive. You can also
store and retrieve scripts to and from a USB flash drive. The flash
drive must be formatted as a FAT or FAT32 drive.

LCD screen

The Series 2280 has a high-resolution, 4.3-inch color TFT LCD
display. You can access additional interactive screens by pressing
the front-panel MENU key.

Navigation control

Turning the navigation control: Moves the cursor to the left or

the right to highlight a listed value or menu item so that you can
select it.

ENTER key

Selects the highlighted choice or allows you to edit the selected
field.

EXIT key

Returns to the previous screen or closes a dialog box. For
example, press the EXIT key when the main menu is displayed to
return to the home screen. When you are viewing a subscreen
(for example, the Event Log screen), press the EXIT key to return
to the main menu screen.

TRIGGER key

Accesses trigger-related settings and operations. The action of
the TRIGGER key depends on the instrument state.

Soft keys

There are five soft keys located under the display. They provide
access to additional settings on multiple screens. For example,
press the first soft key when the main menu screen is displayed to
move the cursor to the left.

OUTPUT ON/OFF
switch

Turns the output source on or off. The switch illuminates when the
source output is on.

Series 2280 Precision DC Power Supply Reference Manual Section 2: General operation

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REMOTE LED
indicator

Illuminates when the instrument is controlled through a remote
interface.

LAN LED indicator

Illuminates when the instrument is connected to a local area network
(LAN).

Front-panel
binding posts

Positive, negative, and ground output binding posts for output
connections.

LAN port

Supports full connectivity on a 10 Mbps or 100 Mbps network. The
Series 2280 is a version 1.4 Core 2011 compliant instrument that
supports TCP/IP and complies with IEEE Std 802.3 (ethernet
LAN). See LAN communications (on page 2-48).

USB port

USB-B connection for communication, control, and data transfer.
For details, see USB communications (on page 2-64).

Rear-panel overview

The rear panel of the Series 2280 is shown below; descriptions follow the figure.

Figure 2: Series 2280 rear panel

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Power module

The power module contains the AC line receptacle, the power line
fuse, and the line voltage selector switch. For safety precautions
and other details, see Line fuse replacement (on page A-1) and

Power the instrument on and off (on page 2-34).

Digital I/O port

A digital input/output port that detects and outputs digital signals.
The port provides six digital I/O lines. Each output is set high
(+5 V) or low (0 V) and can read high or low logic levels. Each
digital I/O line is an open-drain signal. Refer to Digital I/O (on
page 3-19) for information.

IEEE-488 port

GPIB connection; the default setting for the Series 2280 is 5.
Refer to GPIB communication (on page 2-45).

Rear output
terminals

Connections for the source outputs and the sense inputs.

Front-panel user interface

The front-panel user interface gives you quick access to source settings, measure settings, system
configuration, instrument status, reading buffer information, and other instrument functionality.

The following topics describe the features of the user interface in more detail.

Home screen

The default screen that you see whenever you turn the Series 2280 on is the main home screen. The
following figure shows the home screen with the different areas of the screen numbered. Descriptions
of the screen areas are in the table following the figure.

Series 2280 Precision DC Power Supply Reference Manual Section 2: General operation

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Figure 3: Power supply home screen

#

Screen element

Description

1

System status and event indicators

Located at the top of the home screen, these indicators provide
information about the present state of the instrument. Some of
the indicators open up a dialog box with more information or a
settings menu when selected. For details, see Status and error

indicators (on page 2-5).

2

OUTPUT view area

The green part of the home screen; displays the value of the
present outputs and status indicators.

3

Setting area

Located in the lower left corner of the OUTPUT view area.
Shows the presently set measure range, voltage, and current
limit.

4

Soft-key area

The soft-key area is on the bottom of the home screen. There
are three soft-key areas that show the present setting values.
You can change these values by pressing the buttons below the
screen. To see the additional soft-key areas, select Next at the
bottom right of the screen. For more information, see Soft-key

area (on page 2-10).

Status and error indicators

The indicators across the top of the home screen contain information about the following instrument
settings and states. Highlight an indicator by turning the navigation control and then pressing ENTER
to get more information about the present state of the instrument.

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Communication settings status indicator

Indicator

Meaning

Local

Instrument is controlled from the front panel.

GPIB

Instrument is communicating through a GPIB interface.

VXI-11

Instrument is communicating using VXI-11.

USBTMC

Instrument is communicating through a USB interface
(firmware version 1.05 and earlier, port number raw socket 5050; firmware version

1.06 and later, port number raw socket 5025).

WebPage

Instrument is communicating through a web page.

Move the focus to the communication indicator using the navigation control and press the ENTER key
to see a list of present communications settings.

Figure 4: Series 2280 communication status indicator

Instrument communication activity indicator

The activity indicator is located to the right of the communication settings status indicator. When the
instrument is communicating with a remote interface, the up and down arrows flash.

Figure 5: Instrument communication activity indicator

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Green bar

Buffer status

Empty

Less than one-quarter full

Less than half full, more than one-quarter full

Less than three-quarter full, more than half full

More than three-quarter full

If a service request has been generated, SRQ is displayed to the right of the up and down arrows. You
can configure the instrument to generate a service request (SRQ) when one or more errors or
conditions occur. This indicator stays on until the serial poll byte is read or all the conditions that
caused SRQ are cleared.

Level trigger enabled indicator

When a voltage level trigger or current level trigger is enabled, a solid white square indicator is visible
to the left of the Buffer indicator.

When a level trigger is enabled, data is logged to the buffer when the triggering condition is met.

Buffer indicator

The bar next to Buffer indicates how full the buffer is.

Figure 6: Level trigger enabled indicator

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Trigger mode settings indicator

This indicator shows the status of the trigger operation.

Figure 7: Trigger indicator

List and recall settings indicator

This indicator shows the specified list number or recall settings.

Figure 8: List and recall settings indicator

Series 2280 Precision DC Power Supply Reference Manual Section 2: General operation

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Error and event indicator

Icon

Description

A serious error has occurred. These major errors are:

 Overprotection error (overvoltage, overcurrent, or overtemperature protection).
 Reverse sense leads.

A normal error has occurred. All the errors except the serious errors listed above are normal errors,
such as SCPI command errors and data overflow errors.

No new error or event messages have been logged since you last viewed the error log.

Move the focus to the error and event indicator using navigation control and press the ENTER key to
see the present error and event messages. With the focus on the Event Log button, press ENTER to
see the Error and Event Log.

Figure 9: Error and event indicator

This indicator has a different appearance based on the type of event that has been logged.

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OUTPUT view area

Indicator

Status description

Output status

The instrument always has one of the following indicators visible:

 OFF: The output is turned off.
 CV: The output is turned on and the power supply is in constant voltage (CV)

mode.

 CC: The output is turned on and the power supply is in constant current (CC)

mode.

 DISABLE: The output is turned off and pressing the OUTPUT switch does

not turn on the output.

Fault status

The fault status indicator means that an error occurred:

 OVP: Overvoltage protection.
 OCP: Overcurrent protection.
 OTP: Overtemperature protection.
 RVS: Reversed sense leads on rear panel.

Calculation status

CALC: If either math or filter operation is enabled, the CALC indicator is displayed
in the OUTPUT view area. If none of them are enabled, the CALC indicator is
cleared.

Relative offset status

REL: If relative offset is enabled, the REL indicator is displayed.

Remote status

RWLOCK: All of the front-panel keys are disabled. The instrument can only be
controlled using a remote interface.

This area displays the values for the present measurements and instrument status indicators.
The following table lists the indicators shown on the right of the OUTPUT view area.

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Soft key area

Setting

Description

V-Set

Configure the voltage setting using the numerical keys, soft keys, and
navigation control.

I-Limit

Configure the current setting using the numerical keys, soft keys, and
navigation control.

Range

Press the up arrow to move up a range; press the down arrow to move
down a range. Press AUTO to set autorange.

Measure

Configure the measurement function.

V + I

Press soft key 1 to change the measurement function to concurrent.

V

Press soft key 2 to change the measurement function to voltage.

I

Press soft key 3 to change the measurement function to current.

Next

Switch to home screen 2.

The Series 2280 display has multiple soft-key areas that you can access by pressing the NEXT soft
key. The soft-key areas give you front-panel access to some instrument settings so that you can
change, enable, or disable them quickly. The following topics describe each of these screens.

Soft key area 1

Soft-key area 1 contains the settings shown in the following figure and explained in the table. To
change a setting, press the soft key to open a setting window. After configuration, close the window
by pressing the ENTER or EXIT key.

Figure 10: Soft key area 1 for power supply

If you use the navigation control to adjust the voltage and current settings, the values are applied to
the instrument immediately when output is on.