Series 2281S Battery Simulator and Precision DC Power Supply The Series 2281S Battery Simulator and Precision DC Power Supply innovatively integrates battery simulation with the functions of a high-precision power supply. The 2281S-20-6 can analyze the DC current consumption of a device under test and generate a battery model based on a battery charging process, and simulate a battery based on a battery model. The 2281S-20-6 can output 120 W with 20 V and 6 A, and sink current up to 1 A. • Simulate a battery’s output during the charge and discharge cycles • Create, edit, import, and export battery models • Build a library of battery models using a Source Measure instrument as a model generator • Display the real-time change of the SOC, Voc, and Vt for the simulated battery • Compute battery capacity in Amp-Hour and Equivalent Series Resistance (ESR) 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 information on measurements. Soft-key buttons and a navigation wheel combine with the TFT display to provide an easy-to-navigate user interface that accelerates 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. • Program the battery SOC, Voc, capacity, and internal resistance (ESR) • Provide two modes of simulation–dynamic and static • Monitor charge/discharge current and voltage • Output up to 120 W of low noise, linear regulated power • Monitor load currents from 100 nA to 6 A with high accuracy in power supply mode • Measure voltage and current with 6½-digit resolution Figure 1. Series 2281S startup screen. • Sink current up to 1 A and source current up to 6 A • Built-in graphing simplifies analyzing trends or displaying voltage or current waveforms • High resolution TFT display and soft-key/icon-based user interface simplify operation • Digital I/O for direct communication with other devices and instruments • GPIB, USB, and LAN interfaces • Emulation of front panel display and controls via your web browser simplifies automated control and monitorin

Battery Simulation Based on a Battery Model In the battery simulator function of the 2281S, real battery output performance can be simulated based on a selected battery model. State of charge (SOC) and voltage open circuit (Voc) can be set to any state to test a deviceunder-test’s (DUT’s) performance at various states of the battery. There are two modes from which to choose: Use a Source Measure Unit to Discharge a Battery and Create a Battery Model I • Static: During the static simulation, Voc and SOC stay the same. • Dynamic: During the dynamic simulation, Voc and SOC change according to charging...

Series 2281S Battery Simulator and Precision DC Power Supply Precision DC Power Supply, with DMM-quality High Resolution, Low Current Measurements Capability Figure 5. Battery model table. Easily View and Control Every Parameter of the Battery Test and Simulation Function The bright, 4.3-inch TFT display shows voltage, current, and amp-hour readings, source settings, and many additional settings in large, easy-to-read characters. The icon-based main menu provides all the functions users can control and program for fast access to source setup, measurement setup, display formats, trigger options,...

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 that any production problems can be quickly identified and corrected. Series 2281S supplies can be Figure 7. 2281S rear panel. controlled via their built-in GPIB, USB, or LAN interfaces. The USB interface is test and measurement system (TMC) compliant. The LXI Core compliant...

Series 2281S Battery Simulator and Precision DC Power Supply Specifications 23 °C ±5 °C with 1-hour instrument warm-up. DC Output Ratings Voltage Maximum Power Voltage1 Source Setting Accuracy Additional Offset at Faster Measurement Settings 5½ (0.1 PLC) Regulation Load Output Ripple and Noise Bandwidth 20 Hz–20 MHz Load Transient Recovery Time Resistive load change 50% load to 100% load or 100% load to 50% load: <50 µs to within 15 mV of V-set. Slew Rate Rising Voltage and Falling Voltage: 10 V/s to 100 V/s. Up to 1000 V/s under limited conditions3. 100 V/s (default). Maximum Source Voltage...

Current Current Limit Setting Full-scale Amps Measurement4 (120% over-range except 10A) Range Additional Offset at Faster Measurement Settings5 Measure Resolution and (NPLC) Current Pulse Measurement6 Minimum Pulse Width (10 mA and 100 mA range) 7 2 ms. Minimum Pulse Width (1 A and 10 A range) 7 140 µs. Minimum Time To Capture Two Consecutive Pulses 0.5 ms. 4 6½-digit resolution, 1 PLC reading rate, filter on, autozero on. 5 Filter on, 10 mA and 100 mA ranges: Source Delay 2 ms. 1 A and 10 A ranges: Source Delay 1 ms. 6 Settings: Autozero off, 0.002 PLC, Arm Source: External, Trigger Source:...

Series 2281S Battery Simulator and Precision DC Power Supply Regulation Load Output Ripple and Noise Bandwidth 20 Hz–20 MHz Maximum Continuous Average Sink Current Non-programmable System Measurement Speeds Settings ‘*TRG and TRACe:DATa?’ with BUS Transfer ‘Read?’ with BUS Transfer Measure Resolution and (NPLC) Other Timing Data CV to CC Transition Time (V-Set = 5V, I-limit = 0.5 A, Resistive Load Change 25 Ω to 2.5 Ω) 2.4 ms. CC to CV Transition Time (V-Set = 5V, I-limit = 0.5 A, Resistive Load change 2.5 Ω to 25Ω) 1.1 ms. Function Change (from detection of bus command to function change completed)...