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BK 8524-220V 5000w Programmable Dc Electronic Load, 220vac Version

BK Precision 8524-220V
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5000W Programmable DC Electronic Load, 220VAC version


  • Operates between 0-60 VDC, 1 mA-240 A, 5000 W max
  • Constant current (CC), resistance (CR), voltage (CV) and power (CP) operation
  • Built-in high resolution (1 mA/1 mV) voltage and current measurement (range dependant)
  • Bright, easy to read display (VFD technology)
  • Built-in transient generator
  • Programmable via RS232 or USB interface. RS232 to TTL serial converter cable, USB to TTL serial converter cable, and application software included
  • List mode operation for increased throughput
  • Battery testing mode to provide Ah rating of battery
  • Flexible triggering: Create trigger events by front panel keystroke, back panel TTL signal or software
  • Connect multiple units in parallel to increase current rating
  • Remote sense
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Product Information

8524-220V 5000W Programmable DC Electronic Load, 220VAC Version


BK Precision 8500 Series Programmable DC Electronic Loads

DC Electronic Loads are used for design, manufacturing and evaluation of DC power supplies, batteries, and power components. Other applications include fuel-cell and photovoltaic cell test.

The DC Load can operate under the following modes:
  • Draw a constant voltage from a DC source.
  • Draw a constant current from a DC source.
  • Draw a constant power from a DC source.
  • Present a constant resistance to the DC source (this behavior simulates a perfect resistor whose resistance doesn't change as a function of current or voltage).

8500 Series DC Electronic Loads


Versatile & Economical DC Electronic Loads

The 8500 series Programmable DC Electronic Loads can be used for testing and evaluating a variety of DC power sources. Their wide operating ranges of up to 500 V and 240 A, flexible operating modes and excellent measurement accuracy make the 8500 series well suited for characterizing DC Power supplies, DC-DC Converters, batteries, fuel cells and solar cells.


The loads can operate in CC, CV, CR or CP mode while voltage/current or resistance/power values are measured and displayed in real time. Load terminals are isolated and floating. Over temperature, over power, over voltage, over current and reverse polarity protection will help protect your valuable prototype and circuits.


The DC loads are easy to use. All parameters can be set quickly and precisely from the front panel, or programmed via USB interface.


When selecting a DC load, it is important to consider not only voltage and current requirements, but also power ratings. The power used when testing must fall within the hatched region for the appropriate DC load.


Input Current Graph


Some applications may require high voltage/low current and low voltage/high current which a single load may not be able to handle. B&K Precision’s broad range of DC loads will allow you to select the optimal model for your requirements.


Low voltage operation

The 8500 series can operate well below 1 V which is important for low voltage application such as fuel cell and solar cell testing. All models can regulate (provide a stable input) down to 0.1 V. Model 8518, due to its particularly low input resistance, can operate at full scale current of 240 A at 1.2 V.


Low voltage operation Graph


Typical minimum operating voltage at full scale current:

8500 8502 8510 8512 8514 8518 8520 8522 8524 8526
1.05 V 3 V 1.8 V 3 V 1.92 V 1.2 V 10.8 V 3.6 V 1.56 V 1.8 V

8500 Series Panel Description


Front Panel

The numeric keys and rotary knob provide a convenient interface for setting the operating mode and desired current/voltage/resistance levels quickly and precisely. Voltage and current can be set to a maximum resolution of 1 mV and 0.1 mA respectively (models 8500 and 8502 only). Up to 25 different instrument setups can be stored and recalled from internal memory.


Front Panel



  1. High resolution, easy to read display
    Displays set values and measured values. Current/voltage and power/resistance displays can be toggled. Display resolution for current and voltage is user-selectable. Maximum resolution for model 8500 and 8502 is 1 mV/ 0.1 mA.
  2. Convenient data entry
    Rotary knob for quick analog-style control. Turn to adjust a setting value. Press to toggle measurement display mode.
  3. Numeric keypad
    Conveniently enter set values directly and access secondary functions.
  4. Function keys
    Activate current, voltage, power, or resistance modes and scroll through menus and options.
  5. Front panel load terminals
    Connect to device under test. Hex-head screw


Rear Panel



Rear Panel

  1. Air vents
    Temperature-controlled fan expels air through these vents to keep the temperature constant inside the system.
  2. Trigger and remote sensing terminal block
    Connect sensing lines to this terminal to compensate for voltage drops due to load wire resistance. This terminal block also contains the two connections for the remote TTL trigger input signal.
  3. Interface connection
    Serial interface connector for USB communication.
  4. Voltage switch
    Line voltage selection switch (110 VAC or 220 VAC).

Flexible operating modes


CC, CR, CV and CP mode

In Constant Current (CC) mode, the load will sink 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 characterizing the discharge profile of a battery.

Constant Power (CP) mode simulates a load whose power consumption is independent of the applied voltage. Constant Power (CP) mode is useful for battery testing and simulating a realistic discharge curve.

In Constant Voltage (CV) mode, the load will attempt to sink enough current to control the source voltage to the programmed value. This mode is suitable for testing battery chargers. In Constant Resistance (CR) mode, the load will sink a current linearly proportional to the input voltage in accordance with the programmed resistance. Unlike conventional resistors, the load resistance stays constant regardless of the power level.


Transient generator

The 8500 series offers a variable frequency generator which can be used in all operating modes. The DC load will toggle between 2 preset levels at a frequency between 0.1 Hz to 1 kHz, either continuously or controlled by a trigger.Transient generator


Triggered operation

Triggering is used to allow synchronization of the DC Load's behavior with other events. You can generate a trigger event by front panel keystroke, by applying an external TTL signal to the back panel terminal or by sending a commands over the serial bus. The trigger can be used in pulse mode, transient mode, list mode and works in CC, CR, CV and CP modes.


Remote control and application software


The DC loads can be remotely controlled from any PC with USB interface, allowing the user to fully program and monitor all parameters. USB to TTL serial converter cables are included. For users wanting to write their own custom software, a set of example programs are available for download on the B&K Precision website.


An example of battery discharge characteristics of an AA alkaline battery.


List Mode

A list of command sequences can be stored in non-volatile memory and executed independently of a computer. Execution in list mode greatly reduces command processing time and computer interaction during product testing. The command sequence can be entered manually from the front panel or downloaded from a PC via USB interface.

Application Software

The included Application Software supports front panel emulation of the load and includes a battery test application which provides A*hr rating of a battery and adjustable ending voltage levels (safety voltage). Whether you are designing a device with Nickel-Metal Hydride or Lithium-Ion batteries, the 8500 series have the capabilities to test their characteristics.


What's In The Box

  • Power cord
  • User manual
  • Installation CD
  • TTL to USB serial adapter IT-E132B
  • Test report


Input rating
Voltage 0 – 60 V
Current 0 – 240 A
Power 5000 W
CV Mode Regulation 0.1-18 V 0.1 V to Vmax
CC Mode Regulation 0-24 A 0 – max Current
Current Measurement 0-24 A 0 – max. Current
Voltage Measurement 0 – 18 V 0 - Vmax

BK Precision 8524-220V Product Specifications Summary:
(for full specs please see the full specs tab or the data sheet)

Power Supplies/Electronic Loads Template

Watts5000 Watts
Max Current240 A
Max Voltage60 V
Min Current0 A
Min Voltage0 V
Battery TestYes
Remote Sensing What's This?Yes

Test Equipment General Attributes

Unique FeaturesConstant current (CC), resistance (CR), voltage (CV) and power (CP) operation
Built-in high resolution (0.1 mA/1 mV) voltage and current measurement (range dependent)
Built-in transient generator
Battery testing mode to provide Ah rating of battery
Flexible triggering: Create trigger events by front panel keystroke, back panel TTL signal or software
Connect multiple units in parallel to increase current rating
Remote sense
Warranty1 YEARS
Calibration IncludedFactory Calibration
Power Supply Voltage220V Only, 240V Only
Safety ApprovalCE
Data Logging What's This?Yes
Interfaces I/O RS-232, Remote Sense, USB
Product Weight148 LBS
Product Height14.06 IN
Product Length17.48 IN
Product Width21.22 IN
Shipping Weight188 LBS
ECCN Number3A992
HTS/Schedule B Number8504.40.9540
Country of OriginChina
Shipping Height30 IN
Shipping Length33 IN
Shipping Width29 IN


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