85xx Series Programmable DC Electronic Loads - TestEquity

1 The 8500 Series Programmable DC ElectronicLoads can be used for testing and evaluating avariety of DC power sources. Their wide oper-ating ranges of up to 500 V and 240 A, flexibleoperating modes and excellent measurementaccuracy make the 8500 Series well suited forcharacterizing DC Power supplies, DC-DCConverters, batteries, fuel cells and solar cells. The Loads can operate in CC, CV, CR or CPmode while voltage/current or resistance/powervalues are measured and displayed in real terminals are isolated and protection, including over tempera-ture, over power, over voltage, over current andreverse polarity will help protect your DC Loads are easy to use. All parameterscan be set quickly and precisely from the frontpanel, or programmed via RS232 or USB Electronic Loads8500 seriesVersatile & Economical DC ElectronicLoadsTechnical data subject to change B&K Precision Corp.

2 2008v102810 Data : - 120 V30 A8502300 - 500 V15 A8510600 - 120 V120 A8512600 - 500 V30 A85141200 - 120 V240 A85181200 - 60 V240 A85202400 - 120 V240 A85222400 - 500 V120 A85245000 - 60 V240 A85265000 - 500 V120 AThe 8500 family offers 10 models with a wide range of ratingsModel#PowerOperating VoltageRated CurrentWhen selecting a DC load , it is important toconsider not only voltage and current requirements, but also power ratings. The powerused when testing must fall within the hatchedregion for the appropriate DC applications may require high voltage/lowcurrent and low voltage/high current which a single load may not be able to handle. B&KPrecision s broad range of DC Loads will allowyou to select the optimal model for your W - 1200 W300 WInput currentRated powerInput Electronic LoadsModels 8500, 8502, 8510, 8512, 8514, 8518, 8520, 8522, 8524, 8526 Features Constant current (CC), resistance (CR), voltage(CV) and power (CP) operation Wide voltage and current range, 0 to 500 V, 0to 240 A (5000 W max) Low minimum operating voltage of < V and minimum input resistance of 5 m (model8518)

3 Allowing the load to sink high current atlow voltages, required for fuel and solar cell applications Selected models operate up to 500 V, suitable for high voltage applications Built-in transient generator Short circuit test Built-in high resolution ( mA/1 mV) voltage and current measurement (models 8500 & 8502) Bright, easy to read display (VFD technology) Over-Current/Over-Voltage/Over-Power/Ove r-Temperature Protection RS232 to TTL, USB to TTL serial converter cables and application software included List mode operation for increased throughput. Battery testing mode to provide A*hr rating of battery (ending voltage level is adjustable) Flexible triggering: Create trigger events by front panel keystroke, back panel TTL signal, or software.

4 Remote voltage sensing to compensate for the effect of voltage drop in wires. Store 25 instrument setups Thermostatically-controlled fans allow operation in quiet environments with minimal disruption. All models are rack mountable. Compact 300 W and 600 W models for bench useApplications: DC power supply testing Characterization of rechargeable batteries. A battery test mode is provided that will measure the ampere*hour (A*hr) characteristic of a battery. Fuel and solar cell test High voltage applicationsLow voltage operationThe 8500 Series can operate well below 1 Vwhich is important for low voltage applicationsuch as fuel cell and solar cell testing. All modelscan regulate (provide a stable input) down to V.

5 Model 8518, due to its particularly lowinput resistance, can operate at full scale currentof 240 A at V (see image)Typical minimum operating voltage at full scale current: V3 V3 Electronic LoadsModels 8500, 8502, 8510, 8512, 8514, 8518, 8520, 8522, 8524, 8526 Rear view 21)Air vents Temperature-controlled fan expels air throughthese vents to keep the temperature constantinside the system. 2)Trigger and remote sensing terminal blockConnect sensing lines to this terminal to compensate for voltage drops due to load wireresistance. This terminal block also contains thetwo connections for the remote TTL trigger panel operation,rear panel 12345 The numeric keys and rotary knob provide a convenient interface for setting the operatingmode and desired current/voltage/resistance levels quickly and precisely.

6 Voltage and currentcan be set to a maximum resolution of 1 mV mA respectively (models 8500 and 8502only). Up to 25 different instrument setups canbe stored and recalled from internal memory. 1) High resolution, easy to read displayDisplays set values and measured and power/resistance displayscan be toggled. Display resolution for currentand voltage is user-selectable. Maximum resolution for model 8500 and 8502 is 1 )Convenient data entryRotary knob for quick analog-style control. Turnto adjust a setting value. Press to toggle measurement display )Numeric keypadConveniently enter set values directly and accesssecondary )Function keysActivate current, voltage, power, or resistancemodes and scroll through menus and )Front panel load terminalsConnect to device under test.

7 Hex-head screw terminals3) Interface connectionSerial interface connector for RS232 or )Voltage switchLine voltage selection switch (110 VAC or 220 VAC).Hex-head screw terminals are used for models8518 and 8520 8526 to connect , CR, CV and CP modeIn Constant Current (CC) mode, the load willsink a current according to the programmed current value regardless of the input voltage.(CC) mode can be used for load regulation testing of DC power supplies or for characteriz-ing the discharge profile of a battery. Constant Power (CP) mode simulates a loadwhose power consumption is independent of theapplied voltage. Constant Power (CP) mode isuseful for battery testing and simulating a realistic discharge Constant Voltage (CV) mode, the load willattempt to sink enough current to control thesource voltage to the programmed value.

8 Thismode is suitable for testing battery Constant Resistance (CR) mode, the load willsink a current linearly proportional to the inputvoltage in accordance with the Electronic LoadsModels 8500, 8502, 8510, 8512, 8514, 8518, 8520, 8522, 8524, 8526 Flexible operating modes Remote control & application software resistance. Unlike conventional resistors, theload resistance stays constant regardless of thepower generatorThe 8500 Series offers a variable frequency generator which can be used in all operatingmodes. The DC load will toggle between 2 preset levels at a frequency between Hz to 1 kHz, either continuously or controlled by a trigger. Triggered operationTriggering is used to allow synchronization of theDC load 's behavior with other events.

9 You cangenerate a trigger event by front panel keystroke,by applying an external TTL signal to the backpanel terminal or by sending a commands overthe serial bus. The trigger can be used in pulsemode, transient mode, list mode and works inCC, CR, CV and CP DC Loads can be remotely controlled fromany PC with USB or RS232 interface, allowingthe user to fully program and monitor all parameters. RS232 to TTL and USB to TTLserial converter cables are included. For userswanting to write their own custom software, a setof example programs are available for downloadon the B&K Precision website. List ModeA list of command sequences can be stored innon-volatile memory and executed independentlyof a computer.

10 Execution in list mode greatlyreduces command processing time and computerinteraction during product testing. The commandsequence can be entered manually from the frontpanel or downloaded from a PC via RS232 orUSB SoftwareThe included Application Software supports frontpanel emulation of the load and includes a battery test application which provides A*hr rating of a battery and adjustable ending voltagelevels (safety voltage).Whether you are designing a device with Nickel-Metal Hydride or Lithium-Ion batteries,the 8500 Series have the capabilities to test theircharacteristics. An example of battery discharge characteristics of an AA alkaline 8500 Voltage0 to 120 V0 to 500 VInput rating Current1 mA to 30 A1 mA to 15 APower300 WDC Electronic LoadsModels 8500, 8502, 8510, 8512, 8514, 8518, 8520, 8522, 8524, 8526 SpecificationsCV V ( + FS)1 120 500 V ( + FS)10 mVCC Mode0 3 A0 3 A ( + FS) mARegulation0 30 A0 15 A ( + FS)1 mA0 3 A0 3 A ( + FS) mACurrent Measurement0 30 A0 15 A8500: ( + FS)8502.