Series 2280 Precision Measurement DC
Power Supplies Quick Start Guide
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 ins
operation, and maintenance information carefully before using the product. Refer to the user
documentation for complete product specifi cations.
If the product is used in a manner not specifi ed, 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
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 vol
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 ar
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
e designed for use with electrical signals that are measurement, control,
tage or replacing consumable materials. Maintenance
its specifi cations and operating
tallation,
overvoltages often associated with local AC mains connections. Certain Keithley measuring
instruments may be connected to
or higher.
Unless explicitly allowed in the specifi cations, 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 fi xtures. 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 s
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 shoc
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 co
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, tes
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.
k. If the circuit is capable of operating at or above 1000 V, no conductive part of
mains. These instruments will be marked as category II
afety practice is to expect that hazardous voltage is present
rd is connected to a properly-grounded
t cables, or a
ny other instruments while
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 specifi ed in t
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 defi ned in the specifi cations and operating information and shown on the instrument
panels, test fi xture panels, and switching cards.
When fuses are used in a product, replace with the same type and rating for continued
protection against fi re hazard.
Chassis c
onnections must only be used as shield connections for measuring circuits, NOT as
protective earth (safety ground) connections.
If you are using a test fi xture, 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
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.
f this symbol is on a product, it indicates that mercury is present in the display lamp. Please
I
note that the lamp must be properly disposed of according to federal, state, and local laws.
shock. Use standard safety
he
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 expla
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 huma
Before performing any maintenance, disconnect the line cord and all test cables.
To maintain protection from electric shock and fi re, 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 wi
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 offi ce for information.
Unless otherwise noted in product-specifi c literat
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 wat
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 instr
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 aff ected, the board should be returned to the factory for proper cleaning/servicing.
Safety precaution revision as of June 2017.
th a similarly rated power cord. Other components that are not safety-related may
ument. Products that consist of a circuit board with
ins hazards that could damage the
ns.
ure, Keithley instruments are designed to
er or mild, water-based
Safety
Power and environmental specications
CAUTION
For indoor use only.
Power supply
Operating altitude
Operating
temperature
Storage temperature
Pollution degree
100 V/120 V/220 V/240 V AC,
50 Hz or 60 Hz
Maximum 2000 m (6562 ft ) above sea level
0 °C to 40 °C, full accuracy to 80% relative
humidity at up to 35 °C, noncondensing
-25 °C to 70 °C, 5% to 95% relative humidity
at up to 40 °C and 5% to 60% relative
humidity above 40 °C up to 70 °C
2
Carefully consider and congure the appropriate
output‑o state, source levels, and compliance levels
before connecting the instrument to a device that can
deliver energy. Failure to consider the output‑o state,
source levels, and compliance levels may result in
damage to the instrument or to the device under test.
Introduction
Thank you for choosing a Keithley Instruments product. The
Series 2280 Precision Measurement DC Power Supplies
are high-sensitivity, accurate, programmable instruments
that source low noise and stable voltage, and can monitor
load currents over a wide dynamic range, from amperes to
nanoamperes. With a high-resolution, 4.3-inch color display,
numerous parameters describing the state of the instrument
are displayed that allow you to get the most information from
your measurements.
In addition, you can monitor trends such as drift with
the built-in plotting functionality. As a power supply in an
automated test system, this power supply provides a list
mode and triggers, and speed optimization to minimize test
time.
Complete documentation for the Series 2280 instruments is
available for download at tek.com/product-support.
Model number Description
2280S-32-6 Precision Measurement Programmable DC
Power Supply, 32 V, 6 A
2280S-60-3 Precision Measurement Programmable DC
Power Supply, 60 V, 3.2 A
Introduction
Unpack and inspect the instrument
CAUTION
To unpack and inspect the instrument:
1. Inspect the box for damage.
2. Open the top of the box.
3. Remove the documentation and accessories.
4. Carefully lift the instrument out of the box.
5. Remove the packaging insert.
6. Inspect the instrument for any obvious signs of physical
damage. Report any damage to the shipping agent
immediately.
Do not lift the Series 2280 using the front bezel. Lifting
the instrument by the front bezel can cause instrument
damage.
You should have received the Series 2280 with the following
accessories:
1. Power line cord
2. Series 2280 Quick Start Guide (this document)
3. LAN crossover cable for ethernet
4. Keithley Instruments Safety Precautions
5. Rear-panel mating connector with cover
Refer to the packing list for additional items that may have
shipped with your instrument.
Connect the instrument
Important test system safety information
This product is sold as a stand-alone instrument that may
become part of a system that could contain hazardous
voltages and energy sources. It is the responsibility of the
test system designer, integrator, installer, maintenance
personnel, and service personnel to make sure the system is
safe during use and is operating properly.
You must also realize that in many test systems a single
fault, such as a software error, may output hazardous signal
levels even when the system indicates that there is no
hazard present.
It is important that you consider the following factors in your
system design and use:
• The international safety standard IEC 61010-1 denes
voltages as hazardous if they exceed 30 V
42.4 V
locations. Keithley Instruments products are only rated for
dry locations.
, or 60 VDC for equipment rated for dry
peak
RMS
and
• Read and comply with the specications of all instruments
in the system. The overall allowed signal levels may be
constrained by the lowest rated instrument in the system.
For example, if you are using a 500 V power supply with
a 300 VDC rated switch, the maximum allowed voltage in
the system is 300 VDC.
• Make sure any test xture connected to the system
protects the operator from contact with hazardous
voltages, hot surfaces, and sharp objects. Use shields,
barriers, insulation, and safety interlocks to accomplish
this.
• Cover the device under test (DUT) to protect the operator
from ying debris in the event of a system or DUT failure.
• Double-insulate all electrical connections that an operator
can touch. Double insulation ensures the operator is still
protected even if one insulation layer fails. Refer to IEC
61010-1 for specic requirements.
Connect
• Make sure all connections are behind a locked cabinet
NOTE
CAUTION
door or other barrier. This protects the system operator
from accidentally removing a connection by hand and
exposing hazardous voltages. Use high-reliability fail-safe
interlock switches to disconnect power sources when a
test xture cover is opened.
• Where possible, use automatic handlers so operators
are not required to access the DUT or other potentially
hazardous areas.
• Provide training to all users of the system so they
understand all potential hazards and know how to protect
themselves from injury.
• In many systems, during power up, the outputs may be in
an unknown state until they are properly initialized. Make
sure the design can tolerate this situation without causing
operator injury or hardware damage.
To keep users safe, always read and follow all safety warnings
provided with each of the instruments in your system.
Install the instrument
You can use the Series 2280 on a bench or in a rack. See
the instructions that came with your rack-mount kit if you are
installing the Series 2280 in a rack.
To prevent damaging heat build-up and to ensure specied
performance, make sure there is adequate ventilation and air
ow around the instrument to ensure proper cooling. Do not
cover the ventilation holes on the top, sides, or bottom of the
instrument.
Make sure the instrument is positioned so that it is easy to
reach any disconnecting devices, such as the power cord
and the power switch.
On some sensitive or easily damaged devices under
test (DUTs), the instrument power-up and power down
sequences can apply transient signals to the DUT that
may aect or damage it. When testing this type of DUT,
do not make nal connections to it until the instrument
has completed its power-up sequence and is in a known
operating state.
CAUTION
WARNING
Power up the instrument
The Series 2280 operates at 100 V, 120 V, 220 V, or 240 V
with a frequency of 50 Hz or 60 Hz. Make sure that the AC
line voltage indicator in the center of the rear-panel power
module matches the AC line voltage in your facility.
The power cord supplied with the Series 2280 contains
a separate protective earth (safety ground) wire for use
with grounded outlets. When proper connections are
made, the instrument chassis is connected to power-line
ground through the ground wire in the power cord.
In addition, a redundant protective earth connection
is provided through a screw on the rear panel. This
terminal should be connected to a known protective
earth. In the event of a failure, not using a properly
grounded protective earth and grounded outlet may
result in personal injury or death due to electric shock.
Do not replace detachable mains supply cords with
inadequately rated cords. Failure to use properly rated
cords may result in personal injury or death due to
electric shock.
Operating the instrument on an incorrect line voltage
may cause damage to the instrument, possibly voiding
the warranty.
To connect line power:
1. Make sure the front-panel power switch is in the
o position.
2. Connect the socket of the supplied power cord to
the power connection on the rear panel.
3. Connect the plug of the power cord to a grounded
AC outlet.
Connect
CAUTION
Turn on the instrument
Turn on the instrument by pressing the front-panel POWER
switch to the on position. The instrument powers up.
Connections for testing
Use the wire ratings listed in the following table when making
connections to the instrument.
Usage Specications
Front panel binding posts AWG 20 to AWG 12
Rear panel output terminals AWG 20 to AWG 12
The wire must be heavy enough not to overheat while
carrying the short-circuit output current of the unit.
Please meet the wiring requirements described above.
Two-wire connections
Two-wire connections are used for basic operation when
maximum accuracy is not required. Keep the wire as short
as possible to reduce lead inductance and noise pickup. The
following illustration shows two-wire (local sensing) DUT
connections to the front panel.
NOTE
WARNING
The following illustration shows two-wire (local sensing) DUT
connections to the rear panel.
After making the connections, slide the cover over the
rear-panel mating connector and wires.
When making two-wire connections to the Series 2280, you
must short both Output Hi and Sense Hi and Output Lo and
Sense Lo with the shorting jumpers. If you do not do this, the
display will show incorrect voltage output readings.
Failure to install the cable housing may result in
personal injury or death due to electric shock.
Connect
DUT
Four-wire remote sense connection
WARNING
Using four-wire remote sensing connections ensures that the
programmed voltage is applied to the load and compensates
for the voltage drop in the leads between the power supply
and the load.
As shipped, the sense terminals are connected to the
output terminals by shorting jumpers. Before connecting the
wire, make sure the shorting jumpers have been removed.
When you connect the power supply for remote sensing,
the remote sense circuit detects the voltage at the sensing
points (load) and not the output terminals. The following
illustration shows the four-wire (remote sensing) DUT
connection to the rear panel.
After making the connections, slide the cover over the
rear-panel mating connector and wires.
Failure to install the cable housing may result in
personal injury or death due to electric shock.
Overview of the front-panel options
ENTER and EXIT keys
The ENTER key selects a highlighted option. In most cases,
it opens the menu or dialog box that allows you to change
settings for that option.
The EXIT key returns to the previous menu or closes a
dialog box. For example, if you are on the menu screen,
pressing EXIT returns you to the Home screen.
The front panel of the Series 2280 allows you to set up most
instrument functions and features and perform sourcing and
measuring operations. The front panel includes:
• A high-resolution color display that allows you to access
instrument settings and measurement readings
• Keys that select menu options and start measurement
operations
• A navigation control that can be used to select screen
options
• An OUTPUT switch turns the source output on or o
• Front-panel binding posts for output connections
TRIGGER key
The action of the TRIGGER key depends on the trigger
method that is selected and the state of the trigger model:
• If manual triggering is selected, pressing TRIGGER
causes the instrument to make a measurement.
• If the trigger model is idle, pressing TRIGGER initiates
the trigger model.
Explore
Front-panel user interface overview
The front-panel user interface gives you quick access to
source settings, measure settings, system conguration,
instrument status, reading buer information, and other
instrument functionality.
Home screen overview
The Home screen is the rst screen that opens on power up.
You can always return to the Home screen by pressing the
HOME key.
The top row on the Home screen displays the status and
event indicators. You can select these options to open dialog
boxes that provide additional information about the status or
event.
The OUTPUT view area of the Home screen displays the
value of the present outputs and status indicators. The
outputs show dashed lines until the output is turned on.
The settings area of the Home screen is on the lower left
corner of the OUTPUT view area. It shows the presently set
measure range, voltage, and current limit.
The soft-key area is on the bottom of the Home screen. It
shows the present setting values. You can change these
values by selecting the buttons below the screen. Select
Next to view additional soft-key options.
Menu screen overview
When you press the MENU key on the front panel, the menu
screen is displayed.
From this screen, you can select source, measure, Views,
Trigger, and System setup menus. These menus allow
you to choose options to set up your instrument for your
applications. Select a menu item by either scrolling using
the navigation control or using the arrow keys to highlight an
icon. Then press ENTER.
An example of the options that are available when you select
the Settings option under Measure is shown below.
Explore
Voltage output and current measurement
CAUTION
The following example demonstrates how to congure a
voltage output and make a precision voltage and current
measurement using the default instrument conguration.
Connect the DUT (for this example, a 1 kΩ resistor) to the
output binding post on the front panel. For details, refer to
the two-wire connection drawing in the Connect section.
To set the voltage and current limit on the front panel:
1. Press the Home key. The Home screen is displayed.
2. Select the V-Set soft key. The editing window is
displayed at the bottom.
3. Set the voltage to 5 V. Enter 5 using the numerical keys
on the right of the front panel. You can also change the
value using either the arrow keys or navigation control.
4. Press Enter
5. Press the I-Limit soft key. The editing window is
displayed at the bottom.
6. Set the current limit to 1 A. and press ENTER.
7. Press the OUTPUT switch to turn the output on.
When the output is turned on, changing the value with
the navigation control can source voltage and current
instantly. Make sure the output does not damage your
device under test (DUT).
Select a measure function
The Series 2280 allows you to perform the following
measurement functions.
Measure functions What the instrument measures
Concurrent (V + I) Measure voltage and current at the
same time
Voltage (V) Only measure voltage
Current (I) Only measure current
To set the measure function from the menu screen:
1. Press the MENU key.
2. Under Measure, select Settings.
3. Select the button next to Function and press the ENTER
key. The selection window is displayed.
4. Select a measure function.
To set the measure function from the Home screen:
1. Select the Measure soft key. The selection window is
displayed.
2. Select a measure function.
Test
Specify a measurement range
You can set specic ranges for the measurement values
or you can allow the instrument to choose the ranges
automatically.
The measurement range determines the full-scale input for
the measurement. The measurement range also aects the
accuracy of the measurements and the maximum signal that
can be measured.
Model
number
2280S-32-6 10 A
Current
measurement range
Voltage
measurement range
32 V
1 A
100 mA
10 mA
2280S-60-3 10 A
60 V
1 A
100 mA
10 mA
The Series 2280 has multiple current measurement ranges
and one voltage range. The ranges are listed in the following
table.
To set the ranges from the Home screen:
1. Press the HOME key and select the Range soft key. The
Range dialog box is displayed.
2. Use the up and down arrow soft keys to select the range.
The Home page is updated with the new range setting.
Press EXIT to close the Range dialog box.
To set the ranges from the menu screen:
1. Press the MENU key.
2. Highlight the Settings icon under Measure using either
the navigation control or the soft keys. Press ENTER.
3. On the MEASURE SETTINGS page, select the button
next to Range. The Range dialog box is displayed.
4. Select the range. You are returned to the MEASURE
SETTINGS screen.
Congure and execute a 10-step linear list sweep
The following example demonstrates the steps to set up the
power supply to output a linear list sweep from 1 V to 10 V in
1 V steps (default settings). Each step in the list sweep
dwells for three seconds. The list is stored in list location 1.
The output turns on at 0 V and returns to 0 V at the end of
the list execution.
To congure a list using the front panel:
1. Press the MENU key.
2. Under Source, highlight the List icon using either the
navigation control or the soft keys. Press ENTER.
3. Select point 1 and press ENTER.
4. Highlight Insert and press ENTER to increment the
points display until there are 10 points.
5. Select the Voltage box in the point 1 row. Press ENTER.
6. Set the value to 1 V and press ENTER.
7. Select the Current box in the point 1 row. Press ENTER.
8. Set the value to 2 A and press ENTER.
9. Select the Dwell box in the point 1 row. Press ENTER.
10. Set the value to 3 s and press ENTER.
11. Repeat steps 5 to 8 for points 2 to 10 and increase the
voltage by 1 V at each higher step.
12. Select the Save button to store the list in memory
location 1.
13. Enter a name for the list on the displayed keypad and
press ENTER.
14. Press the EXIT key.
Test
To delete a row using the front panel:
1. Highlight the Points cell of the row you want to delete.
2. Press ENTER to select the cell row.
3. Navigate to Delete.
4. Press ENTER.
To execute a list sweep using the front panel:
1. Press the MENU key.
2. Under Trigger, highlight the Congure icon using either
the navigation control or the soft keys. Press ENTER.
3. Select the button next to Sample Count and press the
ENTER key.
4. Set the sample count to 10.
5. Press the HOME key.
6. Press the Next soft key twice to go to the third soft-key
area.
7. Press the List soft key. The List dialog box is displayed.
8. If the Number soft key is not showing a 1, press the
Number soft key and enter the value, 1.
9. Press the Enable soft key to run list 1.
To view the measurements on the front panel:
1. Press the Exit key to close the List dialog box.
2. Press the View soft key under Graph to view a plot of the
measurements.
Next steps
For more information, refer to the Series 2280 Precision DC
Power Supply Reference Manual, which provides detailed
information about all of the features of the instrument.
Also see the Keithley Instruments website, tek.com/keithley for
support and additional information about the instrument.
FAQs and next steps
Contact information:
Australia* 1 800 709 465
Austria 00800 2255 4835
Balkans, Israel, South Africa, and other
ISE countries +41 52 675 3777
Belgium* 00800 2255 4835
Brazil +55 (11) 3759 7627
Canada 1 800 833 9200
Central East Europe / Baltics
+41 52 675 3777
Central Europe / Greece +41 52 675 3777
Denmark +45 80 88 1401
Finland +41 52 675 3777
France* 00800 2255 4835
Germany* 00800 2255 4835
Hong Kong 400 820 5835
India 000 800 650 1835
Indonesia 007 803 601 5249
Italy 00800 2255 4835
Japan 81 (3) 6714 3010
Luxembourg +41 52 675 3777
Malaysia 1 800 22 55835
Mexico, Central/South America, and
Caribbean 52 (55) 56 04 50 90
Middle East, Asia, and North Africa
+41 52 675 3777
The Netherlands* 00800 2255 4835
New Zealand 0800 800 238
Norway 800 16098
People’s Republic of China 400 820 5835
Philippines 1 800 1601 0077
Poland +41 52 675 3777
Portugal 80 08 12370
Republic of Korea +82 2 565 1455
Russia / CIS +7 (495) 6647564
Singapore 800 6011 473
South Africa +41 52 675 3777
Spain* 00800 2255 4835
Sweden* 00800 2255 4835
Switzerland* 00800 2255 4835
Taiwan 886 (2) 2656 6688
Thailand 1 800 011 931
United Kingdom / Ireland* 00800 2255 4835
USA 1 800 833 9200
Vietnam 12060128
* European toll-free number. If not
accessible, call: +41 52 675 3777
Find more valuable resources at TEK.COM
Copyright © 2019, Tektronix. All rights reserved.
Tektronix products are covered by U.S. and
foreign patents, issued and pending. Information
in this publication supersedes that in all previously
published material. Specfication and price change
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registered trademarks of Tektronix, Inc. All other
trade names referenced are the service marks,
trademarks, or registered trademarks of their
respective companies.
071319001 / March 2019
*P071319001*
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