Keithley System SourceMeter 2601B, System SourceMeter 2602B, System SourceMeter 2604B Instrument Specifications

Models 2601B, 2602B and 2604B

SPEC-2602B Rev. B / February 2014 1 of 13

 Four-quadrant source or sink operation

 Four-quadrant source or sink operation

Keithley Instruments, Inc. System SourceMeter

28775 Aurora Road
Cleveland, Ohio 44139

1-888-KEITHLEY

http://www.keithley.com

Instrument Specifications

®

SPECIFICATION CONDITIONS

This document contains specifications and supp lemental in formation for t he Mod els 2601B, 2602B and
2604B System SourceMeter

®

instrument. Spec ificati ons are the st andar ds against whic h the Models
2601B, 2602B and 2604B are tested. Upon leaving the factory, the Models 2601B, 2602B and 2604B meet
these sp ecifications. Supp l em ental and typ ical valu es are nonw ar ran ted, appl y at 23 °C, and are provid ed
solely as us eful information.

Source and measu r emen t accur acies are speci fied at the Models 2601B, 2602B and 2604B terminals
under these conditions:

1. 23 °C ± 5 ° C , < 70 perc ent relativ e hum idity

2. After a two-hour w ar m-up period

3. Spee d no r ma l (1 NP LC)

4. A/D autozero enabled

5. Remote sense operation or properly zer oed local operation

6. Cal i bration period: One year

DC POWER SPECIFICATIONS

Voltage Current
Maximum output

power and
source/sink limits1

40.4 W maxi mum

 ± (40.4 V at 1.0 A, -1.0 A)
 ± (6.06 V at 3.0 A, -3.0 A)

40.4 W maxi mum

 ± (1.01 A at 40 V, -40 V)
 ± (3.03 A at 6 V, -6 V)

Refer to the “Pulse Characteristics” section for pulsing details, such as duty cycle and pulse width.

1

Full power source operation regardless of loa d to 30 °C ambient temperature. Abov e 30 °C or power sink operation, refer to “Operat ing

Boundaries” in the Series 2600B Reference Manual for additional power derating information.

Specifications are subject to change without notice

Models 2601B, 2602B and 2604B System SourceMeter® Instrument Specifications

2 of 13 SPEC-2602B Rev. B / February 2014

VOLTAGE ACCURACY SPECIFICATIONS

2,3

Source Measure

Range

Programming
resolution

Accuracy

± (% reading + volts)

Typical Noise
(Peak to Peak)

0.1 Hz to 10 Hz

Display
resolution

Accuracy4

± (% reading + volts)

100 mV 5 µV 0.02 % + 250 µV 20 µV 100 nV 0.015 % + 150 µV
1 V 50 µV 0.02 % + 400 µV 50 µV 1 µV 0.015 % + 200 µV
6 V 50 µV 0.02 % + 1.8 mV 100 µV 1 µV 0.015 % + 1 mV
40 V 500 µV 0.02 % + 12 mV 500 µV 10 µV 0.015 % + 8 mV

CURRENT ACCURACY SPECIFICATIONS2

Source Measure

Programming
resolution

Range

100 nA 2 pA 0.06 % + 100 pA 5 pA 100 fA 0.05 % + 100 pA
1 µA 20 pA 0.03 % + 800 pA 25 pA 1 pA 0.025 % + 500 pA
10 µA 200 pA 0.03 % + 5 nA 60 pA 10 pA 0.025 % + 1.5 nA
100 µA 2 nA 0.03 % + 60 nA 3 nA 100 pA 0.02 % + 25 nA

Accuracy

± (% reading + amperes)

Typical Noise
(Peak to Peak)

0.1 Hz to 10 Hz

Display
resolution

Accuracy4

± (% reading + amperes)

1 mA 20 nA 0.03 % + 300 nA 6 nA 1 nA 0.02 % + 200 nA
10 mA 200 nA 0.03 % + 6 µA 200 nA 10 nA 0.02 % + 2.5 µA
100 mA 2 µA 0.03 % + 30 µA 600 nA 100 nA 0.02 % + 20 µA
1 A 20 µA 0.05 % + 1.8 mA 70 µA 1 µA 0.03 % + 1.5 mA
3 A 20 µA 0.06 % + 4 mA 150 µA 1 µA 0.05 % + 3.5 mA
10 A5 200 µA 0.5 % + 40 mA N/A 10 µA 0.4 % + 25 mA

2

For temperatures 0 °C to 18 °C and 28 °C to 50 °C, accuracy is degraded by ± (0.15 × accuracy specification)/°C. High Capacitance Mode

accuracy is applic ab le at 23 °C ± 5 °C.

3

Add 50 µV to source accuracy specifications per volt of HI lead drop.

4

Derate accuracy specification for NPLC setting < 1 by increasing the error term. Add appropriate typical percent of r eading term for resistive

loads usi ng the table below.

NPLC setting 100 mV range 1 V and 40 V ranges 100 nA range 1 µA to 100 m A ranges 1 A to 3 A ranges

0.1 0.01 % 0.01 % 0.01 % 0.01 % 0.01 %

0.01 0.08 % 0.07 % 0.1 % 0.05 % 0.05 %

0.001 0.8 % 0.6 % 1 % 0.5 % 1.1 %

5

10 A range is accessible in pulse mode only. A cc uracy specificatio ns for 10 A range are typical.

Specifications are subject to change without notice

Models 2601B, 2602B and 2604B System SourceMeter Instrument Specifications

SPEC-2602B Rev. B / February 2014 3 of 13

SUPPLEMENTAL CHARAC TERISTICS

The followin g specific ation s are supplem ental charact er isti cs t hat provide additional i nform ation about
ins trum ent functi ons and perform ance. These characteristics are nonwarranted specifications; they
describe the typical performance of th e Models 2601B, 2602B and 2604B.

PULSE CHARACTERISTI CS

Pulse region specifications Pulse region specifications

Region

quadrant diagram

Region
maximums

1 1 A at 40 V DC, no limit 100 %
1 3 A at 6 V DC, no limit 100 %
2 1.5 A at 40 V 100 ms 25 %
3 5 A at 35 V 4 ms 4 %
4 10 A at 20 V 1.8 ms 1 %

6

Times measured from the start of pulse to the start off-time; see figure below.

Maximum pulse
width6

Maximum duty
cycle7

7

Thermally limited in sink mode (quadrants 2 and 4) and ambient temperatures above 30° C. See power equations in the S e ries 260 0B

Reference Manual for more information.

Specifications are subject to change without notice

Models 2601B, 2602B and 2604B System SourceMeter® Instrument Specifications

4 of 13 SPEC-2602B Rev. B / February 2014

Minimum programmable

100 µs

be longer than 100 ms.

Source value

Load

Source settling time
(% of range)

Minimum pulse
width

6 V

2 Ω

0.2 %

150 µs

20 V

2 Ω

1 %

200 µs

35 V

7 Ω

0.5 %

500 µs

40 V

27 Ω

0.1 %

400 µs

1.5 A

27 Ω

0.1 %

1.5 ms

3 A

2 Ω

0.2 %

150 µs

5 A

7 Ω

0.5 %

500 µs

10 A

2 Ω

0.5 %

200 µs

6 V range

See Current source output settling time for additional test conditions

< 300 mV/R

load

+ 5 % of larger range

Current < 10 mA

pulse width6

Pulse width programming
resolution

Pulse width programming
accuracy

Pulse width jitter

 Note: Minimum pulse width for settled source at a given I/V output and load can

1 µs

± 5 µs

2 µs

ADDITIONAL SOURCE CHARACTERISTICS

Noise
10 Hz to 20 MHz

Transient response time

< 20 mV peak-peak, < 3 mV RMS



< 70 µs for the output to recover to within 0.1 % for a 10 % to 90 % step change in load.

Overshoot

Range change overshoot

Guard offset voltage

Remote sense operating
range9

Voltage:

 < ±0.1 % + 10 mV
 Step size = 10 % to 90 % of range, resistive load, maximum current

limit/compliance

Current:

 < ±0.1 %
 Step size = 10 % to 90 % of range, resistive load



Voltage:

 < 300 mV + 0.1 % of larger range
 Overshoot into a 100 kΩ load, 20 MHz bandwidth

Current:8



< 4 mV



Maximum voltage between HI and SENSE HI = 3 V
Maximum voltage between LO and SENSE LO = 3 V

8

With source settling set to SETTLE_SMOOTH_100NA

9

Add 50 µV to source accuracy specifications per volt of HI lead drop.

Specifications are subject to change without notice

Models 2601B, 2602B and 2604B System SourceMeter Instrument Specifications

SPEC-2602B Rev. B / February 2014 5 of 13

Minimum value is 10 nA; accuracy is the same as current source

Voltage output headr oom 40 V range

 Maximum output voltage = 42 V – (total voltage drop across source leads).

Maximum 1 Ω source lead.

6 V range

 Maximum output voltage = 8 V – (total voltage drop across source leads).

Maximum 1 Ω source lead.

Over-temperature protection

Internally sensed temperature overload puts the instrument in standby mode

Limit/compliance

Voltage source output
settling time

Current source output
settling time

Bipolar limit (compliance) set with a single value

Voltage:10

 Minimum value is 10 mV; accuracy is the same as voltage source

Current:

11



Time required to reach within 0.1 % of final value after source level command is
processed on a fixed range.

Voltage range Settlin g time

100 mV < 50 µs
1 V < 50 µs
10 V < 110 µs
40 V12 < 150 µs
Time required to reach within 0.1 % of final value after source level command is

processed on a fixed range



Values below for I

Current range Settlin g time

3 A < 80 µs (Current < 2.5 A, R
1 A to 10 mA < 80 µs (R
1 mA < 100 µs

out

× R

load

= 1 V

> 6 Ω)

load

> 2 Ω)

load

100 µA < 150 µs
10 µA < 500 µs
1 µA < 2 ms
100 nA < 20 ms

10

For sink operation (quadrants II and IV) wit ho ut si nk mode enab l ed, add 10 % of compliance range and ±0.02 % of limit settling to the

corresponding voltage source accuracy specifications. For 100 mV range add an additional 60 mV of uncertainty. Specifications apply with
sink mode enabled.

11

For sink operation (quadrants II and IV) without sink mode enabled, add 0.06 % of limit range to the corresponding current limit accuracy

specifications. Specifications apply with sink mode enabled.

12

Add 150 µs when measuring on the 1 A range.

Specifications are subject to change without notice

Models 2601B, 2602B and 2604B System SourceMeter® Instrument Specifications

6 of 13 SPEC-2602B Rev. B / February 2014

Current measure settling

Time required to reach within 0.1 % of final value after source level command is

ADDITIONAL ME ASUREMENT CHARACTERISTICS

Contact check
specifications

13,14

Speed

Fast 1.1 ms (1.2 ms) 5 % + 10 Ω
Medium 4.1 ms (5 ms) 5 % + 1 Ω
Slow 36 ms (42 ms) 5 % + 0.3 Ω

time15

processed on a fixed range
Values below for Vout = 1 V

Current range Settling time

1 mA < 100 µs

Input impedance

> 10 GΩ

ADDITIONAL CHARACTERISTICS

Maximum load impedanc e Normal mode

10 nF

Common mode voltage
Common mode isolation

250 V DC
> 1 GΩ
< 4500 pF

Maximum measurement time
to memory for 60 Hz (50 Hz)

High-capacitance mode

50 µF

Accuracy (1 year)
23° C ± 5° C
± ( % reading + ohms)

Sense high input impedance
Maximum sense lead

resistance
Overrange

13

Includes measurement of SENSE HI to HI and SENSE LO to LO contact resistances.

14

Contact check is not available with the Model 2604B.

15

Com pliance equal to 100 mA

> 10 GΩ
1 kΩ for rated accuracy

101 % of source range
102 % of measure range

Specifications are subject to change without notice

Models 2601B, 2602B and 2604B System SourceMeter Instrument Specifications

SPEC-2602B Rev. B / February 2014 7 of 13

Current measure settling time

Time required to reach within 0.1 % of final value after source level command is

 11 ms delay out of High Capacitance Mode

 6 V range

 Overshoot into a 100 kΩ load, 20 MHz bandwidth

HIGH CAPACITANCE MODE

16,17,18

Accuracy specifications
Voltage source output

settling time

Accuracy specifications are applicable in both Normal and High Capacitance Modes.
Time required to reach within 0.1 % of final value after source level command is

processed on a fixed range.
Current limit = 1 A

Voltage range Settlin g time with C

= 4.7 µF

load

100 mV < 200 µs
1 V < 200 µs
6 V < 200 µs
40 V < 7 ms

processed on a fixed range
Values below for Vout = 1 V unless noted

Current range Settlin g time

3 A and 1A < 120 µs (R

> 2 Ω)

load

100 mA and 10 mA < 100 µs
1 mA < 3 ms
100 µA < 3 ms
10 µA < 230 ms

Capacitor leakage
performance

Using HIGH-C scripts19
Mode change delay

Voltmeter input im pedance
Noise

10 Hz to 20 MHz
Range change overshoot

16

High Capacitance Mode specifications are for DC measurements only.

17

100 nA range is not available in High Capacitance Mode.

18

High Capacitance Mode utilizes locked ranges. Auto range is disabled.

19

Part of KI Factory scripts. See the Series 2600B Reference Manual for details.

1 µA < 230 ms
200 ms @ 50 nA

 Load = 5 µF in parallel with 10 MΩ
 Test: 5 V step and measure

Current ranges of 100 µA and above:

 11 ms delay for both in and out of High Capacitance Mode

Current ranges below 100 µA:

 250 ms delay into High Capacitance Mode

10 GΩ in parallel with 3300 pF
< 30 mV peak-peak

Voltage:

 < 400 mV + 0.1 % of larger range

Specifications are subject to change without notice

Models 2601B, 2602B and 2604B System SourceMeter® Instrument Specifications

8 of 13 SPEC-2602B Rev. B / February 2014

MEASUREMENT SPEED CHARACTERISTICS

20,21

Maximum sweep operation rates (operations per second) for 60 H z (50 Hz):

A/D
converter

Trigger
origin

speed

0.001 NPLC Internal

0.001 NPLC Digital I/O

0.01 NPLC Internal

0.01 NPLC Digital I/O

0.1 NPLC Internal

0.1 NPLC Digital I/O

1.0 NPLC Internal

1.0 NPLC Digital I/O

Measure to
memory

(using user
scripts)

20000
(20000)

8100
(8100)

4900
(4000)

3500
(3100)

580
(480)

550
(460)

59
(49)

59
(49)

Measure to
GPIB

(using user
scripts)

9800
(9800)

7100
(7100)

3900
(3400)

3400
(3000)

560
(470)

550
(460)

59
(49)

59
(49)

Source
measure to
memory

(using user
scripts)

7000
(7000)

5500
(5500)

3400
(3000)

3000
(2700)

550
(465)

540
(450)

59
(49)

59
(49)

Source
measure to
GPIB

(using user
scripts)

6200
(6200)

5100
(5100)

3200
(2900)

2900
(2600)

550
(460)

540
(450)

59
(49)

59
(49)

Source
measure to
memory

(using sweep
API)

12000
(12000)

11200
(11200)

4200
(3700)

4150
(3650)

560
(470)

560
(470)

59
(49)

59
(49)

Source
measure to
GPIB

(using sweep
API)

5900
(5900)

5700
(5700)

4000
(3500)

3800
(3400)

545
(460)

545
(460)

59
(49)

59
(49)

Maximum sing l e m e as u rement r ates (operations per second) for 60 Hz (50 Hz):

A/D converter speed Trigger or igin Measure to GPIB

Source measure to
GPIB

0.001 NPLC Internal 1900 (1800) 1400 (1400) 1400 (1400)

0.01 NPLC Internal 1450 (1400) 1200 (1200) 1100 (1100)

0.1 NPLC Internal 450 (390) 425 (370) 425 (375)

1.0 NPLC Internal 58 (48) 57 (48) 57 (48)

20

Tests performed with a Model 2602B using the following equipment: Computer hardware (Intel

Instruments™ PCI-GPIB); driv er (NI -488.2 Version 2.2 PCI-GPIB); software (Microsoft
version 4.1).

21

Exclude current measurement ranges less than 1 mA.

®

®

Pentium® 4 2.4 GHz, 2 GB RAM, National

Windows® XP, Microsof t® Visual Studio® 2010, VISA™

Source measure
pass/fail to GPIB

Specifications are subject to change without notice

Models 2601B, 2602B and 2604B System SourceMeter Instrument Specifications

SPEC-2602B Rev. B / February 2014 9 of 13

smua.source.levelv

smua.source.leveli

Maximum measurement
range change rate

Maximum source range
change rate

Maximum source function

> 7000 per second for > 10 µA. When changing to or from a range ≥ 1 A, maximum rate
is > 2200/second.

> 400 per second > 10 µA. When changing to or from a range ≥ 1 A, maximum rate is >
190/second.

> 1000 per second

change rate

Command processing time

< 1 ms

 Maximum time required for the output to begin to change after receiving the

or

TRIGGERING AND SYNCHRONIZATION CHARACTERISTICS

Triggering

Trigger in to trigger out

Trigger in to source
change22

Trigger timer accuracy

0.5 μs

10 μs

±2 μs

command.

Source change22 after LXI
trigger

Synchronization

Multi-node synchronized
source change22

Single-node synchronized
source change22

280 μs

< 0.5 μs

< 0.5 μs

22

Fixed source range with no polarity change.

Specifications are subject to change without notice

Models 2601B, 2602B and 2604B System SourceMeter® Instrument Specifications

10 of 13 SPEC-2602B Rev. B / February 2014

 View measurements stored in dedicated reading buffers

 Able to execute high-speed test scripts stored in memory without host intervention

Microsoft

Windows® 2000, XP, Vista®, or 7

browser

SUPPLEMENTAL INFORMATION

Front-panel interface

Display

Two-line vacuum fluorescent display (VFD) with keypad and navigation wheel

 Show error messages and user-defined messages
 Display source and limit settings
 Show current and voltage measurements

Keypad operati ons

 Change host interface settings
 Save and restore instrument setups
 Load and run factory and user-defined test scripts that prompt for input and send

results to the display



Store measurements into dedicated reading buffers

Programming Embedded Test Script Processor (TSP®) scripting engine is accessible from any host

interface:

 Responds to individual instrument control commands
 Responds to high-speed test scripts comprised of remote commands and test script

language (TSL) statements (for example, branching, looping, and math)

Minimum user memory
available

Test Script Builder Integrated development environment for building, running, and managing TSP scripts;

16 MB (approximately 250,000 lines of TSP code)

includes an instrument console for interactive communication with any TSP-enabled
instrument

Requires:

 VISA (NI-VISA included on the Product Information CD-ROM)
 Microsoft

®

.NET Framework (included on the Product Information CD-ROM)

 Keithley I/O Layer (included on the Product Information CD-ROM)
 Intel



TSP® Express (embedded) Tool that allows you to quickly and easily perform common I-V tests without programming

or installing software
To run TSP Express, you need:

®

Pentium III 800 MHz or faster personal computer

®

 Java™ Platform, Standard Edition 6 or 7
 Microsoft

Software interface TSP™ Express (embedded), direct GPIB/VISA, read/write with Microsoft® Visual Basic®,

Visual C/C++®, Visua l C#®, LabVIEW™, CEC TestPoint™ Data Acquisition Software
Package, NI LabWindows™/CVI, and so on.

®

Internet Explorer®, Mozilla® Firefox®, or another Java-compatible web

Specifications are subject to change without notice

Models 2601B, 2602B and 2604B System SourceMeter Instrument Specifications

SPEC-2602B Rev. B / February 2014 11 of 13

instrument uses one TSP-Link node

Free-running 47-bit counter with 1 MHz clock input. Reset each time instrument power is

Reading buffers Nonvolatile memory uses dedicated storage areas reserved for measurement data.

Reading buffers are arrays of measurement elements. Each element can store the
following items:

 Measurement
 Source setting (at the time the measurement was taken)
 Measurement status
 Range information
 Timestamp

Reading buffers can be filled using the front-panel STORE key, and retrieved using the
RECALL key or host interface.

Buffer si ze, with timestamp
and source setting

Buffer size, without
timestamp and source
setting

System expansion23 The TSP-Link expansion interface allows TSP-enabled instruments to trigger and

> 60,000 samples

> 140,000 samples

communicate with each other. See the figure below.

Each Model 2601B and 2602B has two TSP-Link connectors to make it easier to connect
instruments in a sequence.

 Once source-measure instruments are interconnected through the TSP-Link

expansion interface, a computer can access all of the resources of each
source-measure instrument through the host interface of any System SourceMeter.

 A maximum of 32 TSP-Link nodes can be interconnected. Each source-measure

Timing

Timer

Timestamp

Resolution

Timestamp accuracy

23

TSP-Link is not available with the Model 2604B.

Specifications are subject to change without notice

turned on. If the instrument is not turned off, the timer is automatically reset to zero (0)
every four years.

TIMER value is automatically saved when each measurement is triggered

1 μs

±100 ppm

Models 2601B, 2602B and 2604B System SourceMeter® Instrument Specifications

12 of 13 SPEC-2602B Rev. B / February 2014

2604B can use the RS-232 interface to control other instruments

9.84 ft (3 m) maximum between each TSP-enabled instrument

GENERAL SPECIFICATIONS

IEEE-488 IEEE Std 488.1 compliant. Supports IEEE Std 488.2 common commands and status

model topology

RS-232

 Baud rates from 300 bps to 115,200 bps
 Programmable number of data bits, parity type, and flow control (RTS/CTS hardware

or none)

 When not programmed as the active host interface, the Models 2601B, 2602B and

Ethernet

LXI compliance

Expansion interface24

RJ-45 connector, LXI version 1.4 Core 2011, 10/100BaseT, Auto-MDIX

LXI version 1.4 Core 2011



The TSP-Link® expansion interface allows TSP-enabled instruments to trigger and
communicate with each other

 Cable type: Category 5e or higher LAN crossover cable



USB Control (Rear)

USB File System (Front)

Power supply

Cooling Forced air; side intake and rear exhaust. One side must be unobstructed when rack

USB 2.0 Device: USB-TMC488 protocol

USB 2.0 Host: Mass storage class device

100 V to 240 V AC, 50 Hz or 60 Hz (auto sensing), 240 VA maximum

mounted.

Warranty

EMC

Safety

Environment

Dimensions

Weight 2601B: 10.4 lb (4.75 kg)

24

TSP-Link is not available with the Model 2604B.

1 year

Conforms to European Union EMC Directive

NRTL listed to UL61010-1:2008 and CSA C22.2 No. 61010-1
Conforms to European Union Low Voltage Directive

For indoor use only

Altitude: Maximum 6562 ft (2000 m) above sea level
Operating: 0 °C to 50 °C, 70 % relative humidity up to 35 °C. Derate 3 % relative

humidity/°C, 35 °C to 50 °C
Storage: -25 °C to 65 °C

Rack mount: 3.5 in. high × 8.4 in. wide × 17.5 in. deep (89 mm × 213 mm × 460 mm)
Bench configuration (with handle and feet): 4.1 in. high × 9.4 in. wide × 17.5 in. deep

(104 mm × 238 mm × 460 mm)

2602B and 2604B: 12.0 lb (5.50 kg)

Specifications are subject to change without notice

Models 2601B, 2602B and 2604B System SourceMeter Instrument Specifications

SPEC-2602B Rev. B / February 2014 13 of 13

current = 2.1 V / 10 kΩ = 210 µA).

Digital I/O interface25

Connector: 25-pin female D
Input/output pins: 14 open drain I/O bits
Absolute maximum i nput voltage: 5.25 V
Absolute minimum input voltage: -0.25 V
Maximum logic low input voltage: 0.7V, +850 µA max
Minimum logic high input voltage: 2.1 V, +570 µA
Maximum source current (flowing out of digital I/O bit): +960 µA
Maximum sink current at maximum logic low voltage (0.7 ): -5.0 mA
Absolute maximum sink current (flowing into digital I/O pin: -11 mA
5 V power s upply pins: Limited to 250 mA total, solid-state fuse protected

Output Enable: Active high input pulled down internally to ground with a 10 kΩ resistor;

when the output enable input function has been activated, each SourceMeter
channel will not turn on unless the output enable pin is driven to > 2.1 V (nominal

25

The Digital I/O feature is not available with the Model 2604B. Only +5 V, GND and INTERLOCK pins are available with the Model 2604B

Specifications are subject to change without notice