Keithley 2280 series User manual

Reference Manual

077085503 / March 2019

*P077085503*

077085503

Series 2280

Precision Measurement DC Power Supplies

tek.com/keithley

Precision DC Power Supply

Reference Manual

Series 2280

Cleveland, Ohio, U.S.A.

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

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

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

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 +1-440-248-0400. For worldwide contact numbers, visit the Keithley

Instruments website (tek.com/keithley).

Section 1

Introduction

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

1-2 077085503 / March 2019

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

077085503 / March 2019 1-3

Key features

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

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

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

1-4 077085503 / March 2019

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

You will get one of the following quick start guides.

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 accessories

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

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

077085503 / March 2019 1-5

Available services

For the current list of available services and accessories, upgrades, and options for your instrument,

visit tek.com/keithley.

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

General ratings

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

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