Tektronix 2601B-PULSE User manual

Keithley Instruments

28775 Aurora Road
Cleveland, Ohio 44139
1-800-935-5595

tek.com/keithley

2601B-PULSE System SourceMeter Instrument

071374500 April 2020

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Category

Specification

Power supply

100 V ac to 240 V ac, 50 Hz or 60 Hz (autosensing). 240 VA maximum

Input and output connections

See Front panel (on page 3) and Rear panel (on page 6)

Environmental conditions

For indoor use only.
Operating altitude: Maximum 2000 meters (6562 feet) above sea level
Operating temperature: 0 °C to 35 °C at up to 70% relative humidity; at

35 °C to 50 °C, derate 3% relative humidity per °C

Storage: −25 °C to 65 °C
Pollution degree: 1 or 2

Source input electrical ratings

Voltage

40 V dc maximum

Current

3 A maximum at 6 V dc, 1 A maximum at 40 V dc

Pulser feature output, region 4

Region maximums

10 A at 20 V

Maximum pulse width

1.8 ms

Maximum duty cycle

1%

Measure input electrical ratings

Measurement category

O

Voltage

40 V dc maximum HI to LO

Current

3 A maximum at 6 V dc, 1 A maximum at 40 V dc

Impedance

Variable

Safety Supplement

Introduction

This supplement provides you with basic installation, front panel, and rear panel information to help you start
using your Keithley Instruments 2601B-PULSE instrument safely.

For detailed information about these topics, refer to the Model 2601B-PULSE Reference Manual, available from
the Keithley Instruments website (tek.com/keithley).

Power and environmental ratings

The 2601B-PULSE power and environmental ratings and connections are listed in the following tables.

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Supply connection and grounding requirements

Before operating an instrument, make sure that the line cord is connected to a properly grounded, appropriately
rated 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.

Assembly, location, and mounting requirements

The 2601B-PULSE can be mounted in a standard 19-inch rack (horizontal mountings only; mounting vertically
may impede the cooling mechanisms).

When rack mounting the 2601B-PULSE, make sure there is adequate airflow around at least one side to
ensure proper cooling. Adequate airflow enables air temperatures within approximately one inch of the
2601B-PULSE surfaces to remain within specified limits under all operating conditions. The cooling
specifications state:

▪ Forced air
▪ Side intake, rear exhaust
▪ One side must be unobstructed when rack mounted

Ventilation requirements

To prevent damaging heat build-up and ensure specified performance, observe the following precautions.
The rear exhaust vent and at least one side vent must be kept free of any obstructions. Even partial blockage

could impair proper cooling.

▪ Do not position any devices adjacent to the 2601B-PULSE that force air (heated or unheated) into or onto

its cooling vents or surfaces. This additional airflow could compromise accuracy performance.

▪ When rack mounting the 2601B-PULSE, make sure there is adequate airflow around at least one side to

ensure proper cooling. Adequate airflow enables air temperatures within approximately one inch of the
2601B-PULSE surfaces to remain within specified limits under all operating conditions.

▪ Do not rack-mount high power-dissipation equipment adjacent to the 2601B-PULSE that could cause

excessive heating to occur. The specified ambient temperature must be maintained around the surfaces of
the 2601B-PULSE to maintain specified accuracies.

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Power switch. The in position turns the 2601B-PULSE on (I); the out position turns it
off (O).

Toggles between the various source-measure displays and the user message mode.
Configures a function or operation.

SMU (source-measure unit) setup
SRC

Selects the source function (voltage or current) and places the cursor in the source field
for editing.

MEAS

Cycles through measure functions (V, A, Ω or W).

LIMIT

Places the cursor in the compliance limit field for editing. Also selects the limit value to
edit (V, A, or W).

MODE

Selects a meter mode (I-METER, V-METER, OHM-METER, or WATT-METER).

Front panel

The front panel of the 2601B-PULSE is shown below. The descriptions of the front-panel controls, USB port,
and indicators follow the figure.

Figure 1: 2601B-PULSE front-panel controls

1. Power switch, display and configuration keys

2. SMU setup, performance control, special operation, and numbers

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Performance control
DIGITS

SPEED

REL
FILTER

Special operation

LOAD

Loads test for execution (FACTORY, USER, or SCRIPTS).

RUN

Runs the last selected factory or user-defined test.

STORE

Accesses reading buffers and takes readings. TAKE_READINGS: Use to take readings
and store them in a reading buffer. SAVE: Use to save a reading buffer to nonvolatile
memory or to a user-installed flash drive (USB1) in CSV or XML format. Readings
include measurements, source values, and timestamp values, if configured.

RECALL

Recalls information (DATA or STATISTICS) stored in a reading buffer: DATA includes
stored readings, and if configured, source values and timestamp values; STATISTICS
includes MEAN, STD DEV, SAMPLE SIZE, MINIMUM, MAXIMUM, PK-PK.

TRIG

Triggers readings.

MENU

Accesses the main menu. The main menu can be used to configure many functions
and features.

EXIT

Cancels the selection and returns to the previous menu or display. Also used as a
LOCAL key to take the instrument out of remote operation.

ENTER

Accepts the selection and moves to the next choice or exits the menu.

Numbers

Number keys

Sets the display resolution (4½, 5½, or 6½ digits).
Sets the measurement speed (FAST, MEDium, NORMAL, HI-ACCURACY, or

OTHER). Speed and accuracy are set by controlling the measurement aperture.
Controls relative measurements, which allows a baseline value to be subtracted from a

reading.
Enables or disables the digital filter. You can use this filter to reduce reading noise.

When enabled and in EDIT mode, the number keys (0-9, +/-, 0000) allow direct numeric
entry. Press the navigation wheel to enter EDIT mode.

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3. Range keys

Selects the next higher source or measure range.

Enables or disables source or measure autorange.

Selects the next lower source or measure range.

In addition to selecting range functions, the up and down range keys change the format
for non-range numbers (as an example, when editing the limit value).

4. Output control

Turns the source output on or off.

5. USB port

Use the USB port to connect a USB flash drive to the instrument. You can use the USB
flash drive to store reading buffer data, scripts, and user setups. You can also use it to
upgrade the firmware.

6. Cursor keys

Use the CURSOR keys to move the cursor left or right. When the cursor is on the
source or compliance value digit, press the navigation wheel to enter edit mode, and
turn the navigation wheel to edit the value. Press the navigation wheel again when you
finish editing.
Use the CURSOR keys or the navigation wheel to move through menu items. To view a
menu value, use the CURSOR keys for cursor control, and then press the navigation
wheel to view the value or sub-menu item.

7. Navigation wheel

Turn the navigation wheel to:

▪ Move the cursor to the left and the right (the cursor indicates the selected value

or item)

▪ While in edit mode, increase or decrease a selected source or compliance value

Push the navigation wheel to:

▪ Enable or disable edit mode for the selected source or compliance value
▪ Open menus and submenu items
▪ Select a menu option or a value