Series 2281S Precision DC Power Supply
and Battery Simulator 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
*See full specications for other pulse regions
100 V AC/120 V AC/220 V AC/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
The Keithley Instruments Model 2281S Precision DC Power
Supply and Battery Simulator is a is a highly-sensitive,
accurate, programmable power supply that sources stable
low-noise voltage and monitors load currents over a wide
dynamic range, from amperes to nanoamperes. It can also
test batteries and generate battery models to simulate
batteries.
The high-resolution 4.3-inch color display shows numerous
parameters that describe the state of the instrument
to enable you to get the most information from your
measurements.
You can generate and edit battery models on the display. In
addition, the capacity and voltage changes are shown on the
display during the battery simulation.
Complete documentation for the Series 2281S instrument is
available for download at tek.com/product-support.
Model Number Description
2281S-20-6 Precision DC Power Supply and Battery
Simulator, 20 V, 6 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 2281S using the front bezel. Lifting
the instrument by the front bezel can cause instrument
damage.
You should have received the Series 2281S with the
following accessories:
1. Power line cord
2. Series 2281S 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 might 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 ensure the system is
safe during use and 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.
• Make sure all connections are behind a locked cabinet
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.
Connect
• Where possible, use automatic handlers so operators
NOTE
CAUTION
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.
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.
Power up the instrument
The Series 2281S 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.
Install the instrument
You can use the Series 2281S on a bench or in a rack.
Please see the instructions that came with your rack-mount
kit if you are installing the Series 2281S in a rack.
To prevent damaging heat build-up and ensure specied
performance, make sure there is adequate ventilation and air
ow around the instrument to ensure proper cooling.
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.
The power cord supplied with the Series 2281 contains
WARNING
CAUTION
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.
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.
Operating the instrument on an incorrect line voltage
may cause damage to the instrument, possibly voiding
the warranty.
Turn on the instrument
Turn on the instrument by pressing the front-panel POWER
switch to the on position. The instrument powers up.
Connect
Connections for testing
DUT
CAUTION
Two-wire connection
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 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.
The following illustration shows two-wire (local sensing) DUT
WARNING
NOTE
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 with the Series 2281S,
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.
TRIGGER key
The front panel of the Series 2281S 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
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 in 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.
Startup screen
When you turn on the 2281S, you will see the following
startup screen.
As you can see from the gure, the 2281S has three
functions:
• High-precision power supply: Supplies 20 V, 6 ADC
power
• Battery test: Conducts battery charging and discharging
tests to calculate the capacity and resistance of the
battery and creates a battery model
• Battery simulator: Simulates a battery to determine
what eect the battery has on the Device Under Test
(DUT) in dierent states
You can choose a function by turning the navigation control
or pressing the soft keys and pressing ENTER to access the
respective home screens of the function.
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.
Home screen for the power supply function
The above gure shows the home screen for the power
supply function. You can enter this screen by choosing the
power supply function on the startup screen.
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 in 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 pressing the buttons below the screen. Select
Next to view additional soft-key area options.
Explore
Home screen for the battery test function
The above gure shows the home screen for the battery test
function.
You can enter this screen by choosing the battery test
function on the startup screen.
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
values of the battery under test.
The soft-key area is on the bottom of the Home screen. It
shows the present setting values. You can change these
values by pressing the buttons below the screen. Select
Next to view additional soft-key area options.
Home screen for the battery simulator function
The above gure is the Home screen for the battery
simulator function. You can enter this screen by choosing the
battery simulation function in the startup screen.
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
values and status of the battery simulator.
The soft-key area is located 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 area options.
Explore
Menu screen overview
NOTE
When you press the MENU key on the front panel, the menu
screen is displayed.
The options on main menu screen are dierent for each
function chosen on the startup screen (power supply, battery
test, and battery simulator).
The menu items are organized under headings at the top
of the menu screen. Select an icon to access additional
settings.
These menus allow you to choose options to set up your
instrument for your applications. Select a setup item by
either scrolling the navigation control or using the arrow keys
to highlight an icon. Then press ENTER.
An example of the options that are available for the power
supply function when you select Settings under Measure is
shown below.
Voltage output and current measurement
The following example demonstrates how to congure
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. Press 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).
Test
Select a measure function
The Series 2281 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 power supply main
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 power supply
Home screen:
1. Press the Measure soft key. The selection window is
displayed.
2. Select a measure function.
Specify a measurement range
You can set ranges for the measurement values in the power
supply function. You can set specic ranges or 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.
The Series 2281 has multiple current measurement ranges
and one voltage range. The ranges are listed in the following
table.
Model
number
2281S-20-6 10 A
Current
measurement range
1 A
100 mA
10 mA
Voltage
measurement range
20 V
To set the ranges from the power supply 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 ENTER or EXIT to close the Range dialog box.
To set the ranges from the Menu screen (power supply
function only):
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.
Application examples
Battery test
The following example demonstrates how to conduct a
battery test and generate a battery model with 2281S-20-6.
This example uses the Model 2281S to charge a
rechargeable lithium battery from empty to full and measure
battery capacity (amp-hour), battery resistance, and charging
curve (voltage current), and generate a battery model based
on the test results.
To achieve a full-charge cycle, you need to use the 2281S to
discharge the battery to an empty state rst, then charge the
battery from empty to full state and measure voltage, current,
resistance, and amp-hour.
After the charging process is done, the Model 2281S
generates a battery model automatically based on the
results.
Equipment required:
• One 2281S Battery Simulator
• Rechargeable batteries
• Wires
Test
The battery under test and the Model 2281S-20-6 can
WARNING
be connected by two-wire sense connections. However,
four-wire sense connections, as shown in the following
gure, are recommended because they cancel out the wire
resistance.
DUT
To measure the battery capacity and generate a battery
model in the battery test function:
After connecting the battery to the instrument, test the
battery and generate a battery model using the front panel,
with the following process.
To test a battery and generate a battery model:
1. Select the battery test function on the startup screen.
2. Press the MENU key.
3. Under Source, select (Dis)charge to congure the
settings for discharging the battery to the empty state
rst.
The instrument always absorbs current at its maximum
capacity, approximately 1 A. This sink current is not
programmable. If the maximum output current of the
battery under test is less than 1 A, you should connect
a resistor between the instrument and the battery to
prevent the battery from switching into protection mode
or being damaged.
4. Set the target voltage next to V-Set. For example, for a
Li-Ion battery that works in the range of 3.8 V to 4.2 V,
you need to set the target voltage slightly lower than 3.8
V to make sure the battery will be discharged fully.
5. Set the end current next to End condition to 10 mA.
When the discharging current is lower than this value,
the 2281S stops discharging and turn o the output.
6. Press the OUTPUT key on the front panel to discharge
the battery.Wait until the discharging is complete and the
2281S output is turned o.
7. Under Measure, select A-H/C. Starting from this step, the
NOTE
2281S charges the battery, measures its capacity, and
generates a battery model.
8. Set the target voltage next to V-Full. If the battery works
in the range of 3.8 V to 4.2 V, set this value slightly
higher than 4.2 V.
9. Set the maximum charging limit next to Source I-Limit.
This value is set based on the battery specication. If the
current is larger than the maximum current of the battery,
damage may occur.
10. Set the end current to 10 mA next to End condition.
When the charging current is lower than this value, the
2281S stops charging and turns o the output.
11. Return to the battery test home screen by pressing
HOME on the front panel.
12. Select Measure AH in soft key area 2.
13. Set the state to On. Charging starts with the
measurement result (voltage/current/Amp-Hour)
displayed on the screen.
14. After the charging is nished, select Generate in the soft
key Measure AH area to generate a battery model.
15. Set the Voc range for the battery model.
16. Assign a name to the battery model.
17. Select Yes to save the battery model. The Model
2281S-20-6 can save up to nine battery models.
You can view the charging process by selecting Graph or Data
Sheet in soft key area 3 when the charging is in progress.
Test
Battery simulation test
The following example demonstrates simulating a battery
with Model 2281S-20-6.
This example shows how to use a 2281S to replace a real
battery so you can power your device and test the device in
dierent battery states more eciently.
Equipment required:
• One 2281S battery simulator
• A cell phone supplied by a battery
• Wires
The device under test and the 2281S-20-6 can be connected
using a two-wire sense connection, as shown in the
following gure. However, the four-wire sense connection is
recommended because it will cancel out the wire resistance.
To simulate a battery with 2281S-20-6 using the
NOTE
front panel:
1. Select the battery simulator function on the startup
2. Select Model in soft key area 1.
3. Choose 10.mdl, since it is the model of a cellphone
4. Press the MENU key.
5. Under Battery, select Settings.
6. Set Method to Dynamic. The Voc, SOC, and ESR
7. Return to the battery simulator home screen by pressing
screen.
Li-Ion battery normally seen in the market with a voltage
range of 3.7 V to 4.2 V.
of the simulated battery will change according to the
discharging states, just like a real battery.
HOME on the front panel.
8. Select I-Limit in soft key area 2 and set the current limit.
The maximum current from the 2281S to the DUT cannot
be set higher than 6.1 A.
To test a product at a specic battery state, you can
either select an SOC value or an open-circuit voltage
value. The values of the other parameters and internal
resistance adjust based on the battery model. Alternatively,
you can discharge the battery starting at 100% SOC.
You can adjust the capacity of the model by going to soft key
area 2, selecting the Capacity soft key, and setting the value.
If you do not set this value, the battery model denes the
capacity of the battery.
9. On the front panel, press the OUTPUT key to start the
battery simulation.
Test
Next steps
For more information, refer to the Series 2281S‑20‑6
Precision DC Power Supply and Battery Simulator
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
privileges reserved. TEKTRONIX and TEK are
registered trademarks of Tektronix, Inc. All other
trade names referenced are the service marks,
trademarks, or registered trademarks of their
respective companies.
071343002 / March 2019
*P071343002*
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