www.bkprecision.com

DC Electronic Loads

8500 Series

4

C C, CR, C V and C P 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 characteriz-

ing 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

Flexible operating modes

L

Remote control & application software

L

resistance. Unlike conventional resistors, the

load resistance stays constant regardless of the

power level.

Transient g ene rator

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.

Trigg ere d ope rati on

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.

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.

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.

Appl ication 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.

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

Model 8500