Datasheet

ManualsBrandsKeithley ManualsBench Power SuppliesLaboratory Power Supply and Battery Simulator, 20V, 6A, 120W, Programmable

DC POWER SUPPLIES

A Greater Measure of Conﬁdence

www.keithley.com

1.888.KEITHLEY

(U.S. only)

A Tektronix Company

Series 2281S

Single Channel, Precision DC Power

Supply & Battery Simulator

The Series 2281S single channel, precision DC supply and battery simulator innovatively integrates

the functions of high-precision power supply, battery test, and battery simulation. It is able to analyze

the DC consumption of a device under test, test a battery and generate a battery model based on bat-

tery charging process, and simulate a battery based on the battery model. The Model 2281S-20-6 can

output up power to 20V and 6A and sink current up to 1A.

The 2281S uses linear regulation to ensure low output noise and superior load current measurement

sensitivity. A high resolution color thin film transistor (TFT) screen displays a wide range of infor-

mation on measurements. Soft-key buttons and a navigation wheel combine with the TFT display to

provide an easy-to-navigate user interface that speeds instrument setup and operation. In addition,

built-in plotting functions allow monitoring trends such as drift. These features provide the flexibility

required for both benchtop and automated test system applications. In addition, the 2281S provides

a list mode, triggers, and other speed optimization functions to minimize test time in automated

testing applications.

Figure 1. 2281S startup screen.

Precision DC power supply, with DMM-Quality High

Resolution, Low Current Measurements capability

Boasting output up to 120W, 20V, and 6A, unlike conventional power supplies, Series 2281S supplies

can also make measurements with up to 6½ digits of resolution. Voltage output measurements can

be resolved down to 100µV. These supplies measure load currents from 100nA to amps. Four load

current measurement ranges (10A, 1A, 100mA, and 10mA) support measuring a device’s full load

current, standby mode current, and small sleep mode current with DMM-quality accuracy. The high

resolution allows discerning small changes in load currents with confidence. It also makes it possible

to make a broad range of measurements or a single range with excellent accuracy across both low

and high current values.

• Monitor load currents from 100nA

to 6A with high accuracy

• Measure voltage and current with

6½-digit resolution

• Output up to 120W of low noise,

linear regulated power

• Built-in graphing simplifies

analyzing trends or displaying

voltage or current waveforms

• High resolution TFT display

and soft-key/icon-based user

interface simplify power supply

operation

• Digital I/O for direct

communication with other

devices and instruments

• GPIB, USB, and LAN interfaces

• Built-in web page simplifies

automated control and

monitoring

• Battery test with charging and

discharge function

• Sink current up to 1A and source

current up to 6A

• Measure charge/discharge

current and voltage

• Compute battery capacity in

Amp-Hour and Equivalent Series

Resistance (ESR)

• Build battery model based

on measurement results

automatically, which could be

used for battery simulation

• Generate and edit a battery

model

• Import and export a battery

model

• Simulate real battery output

during the charging/discharging

process with battery model

• Set the SOC/V

, capacity, and

resistance of a simulated battery

according to test requirements

• Provide two modes of simulation:

dynamic and static.

• Display the real-time change

of the SOC, V

, and V

for the

simulated battery

Single channel, precision DC power supply and battery simulator

Summary of content (6 pages)

PAGE 1
Series 2281S Single Channel, Precision DC Power Supply & Battery Simulator • Output up to 120W of low noise, linear regulated power • Built-in graphing simplifies analyzing trends or displaying voltage or current waveforms • High resolution TFT display and soft-key/icon-based user interface simplify power supply operation • Digital I/O for direct communication with other devices and instruments • GPIB, USB, and LAN interfaces • Built-in web page simplifies automated control and monitoring • Battery test w
PAGE 2
Single channel, precision DC power supply and battery simulator Ordering Information 2281S-20-6 Precision DC Supply and Battery Simulator, 20V, 6A Accessories Supplied Quick Start Guide KickStart Quick Start Guide User Documentation CD LAN Crossover Cable Power Cord Rear Panel Mating Connector with Cover Measuring a battery during charging/discharging process In the 2281S battery test function, you can conduct a charging/discharging test on a battery.
PAGE 3
Real battery simulation based on battery model In the battery simulator function of the 2281S, real battery output performance can be simulated based on a selected battery model. SOC and Voc can be set to any state to test the device under specific circumstance. There are two modes from which to choose: • Static: During the static simulation, open voltage and SOC stays the same. • Dynamic: During the dynamic simulation, open voltage and SOC change according to charging and discharging like a real battery.
PAGE 4
Single Channel, Precision DC Power Supply & Battery Simulator A choice of front or rear panel terminals provides enhanced connection flexibility. For maximum voltage accuracy, 4-wire remote sensing ensures that the output voltage programmed is actually the level applied to the load. In addition, the sense lines are monitored in order to detect any breaks in them. These features ensure any production problems can be quickly identified and corrected.
PAGE 5
Single Channel, Precision DC Power Supply & Battery Simulator SYSTEM MEASUREMENT SPEEDS Settings Readings/s ‘Read?’ with BUS Transfer Concurrent ( V+I ) Autozero On 60 Hz (50 Hz) Autozero OFF 60 Hz (50 Hz) 2.0 (1.5) 5.4 (4.5) 9.0 (8.0) 20 (18) 48 (38) 50 (48) 680 (646) 845 (833) OTHER TIMING DATA CV TO CC TRANSITION TIME (V-Set = 5V, I-limit = 0.5A, Resistive Load change 25Ω to 2.5Ω): 2.4ms. CC TO CV TRANSITION TIME (V-Set = 5V, I-limit = 0.5A, Resistive Load change 2.5Ω to 25Ω): 1.1ms.
PAGE 6
Series 2281S Single Channel, Precision DC Power Supply & Battery Simulator COMMON MODE CURRENT: < 6µA peak-peak (typical). CHASSIS ISOLATION: ±240V, any terminal to chassis. >1GΩ in parallel with <6.8nF. TEMPERATURE COEFFICIENT: Add the following to all accuracy specifications when outside the range, 23°C ±5°C: (0.15 × specification)/°C for 0° to 18°C and 28° to 40°C. MEASUREMENT DISPLAY MODES: Voltage and current, voltage only, current only.