The Chroma Electronic Loads 63200 series are designed to test DC power sources, power electronic devices, automotive battery and components testing. The high power ratings, parallel and synchronization capabilities make them the ideal tool for testing high power UUT's such as SMR's, UPS's, batteries, and fuel cells. 

 
Power electronic devices testing 

The 63200 series offers 10 different models with power ranges from 2,600 watts to 15,600 watts, currents from 50A to 1,000A and up to a 600V input voltage. The 4 load modes provide different load simulations for various applications. The CC/CR modes are designed to test constant voltage power supplies. CV mode is used to test battery chargers and current sources, and CP mode is ideal for battery testing by simulating the real discharge curve. 


 
Power supply testing 
 
Battery testing

The 63200 series can draw its rated current under very low voltage (1V typical) even under the highest specified slew rate. This unique feature guarantees the best loading performance to a low voltage power supply. With the unique external waveform simulation and Master / Slave control capability, the 63200 series electronic loads allow users to parallel and synchronize more than one load together using an internal or external loading control signal. This feature provides unlimited load simulation and the possibility of power expansion. 

 
Master / Slave parallel control 

 
External loading waveform simulation

The 63200 series also provides the necessary measurement functions and short circuit simulation that extend the test capability for even the most demanding engineering tests and ATE applications. With the LCD display and rotary knob, the 63200 electronic loads offer versatile front panel operations. Users are able to control the 63200 family remotely via GPIB, RS-232 or APG (Analog Programming) interface.

Chroma 63200 series loads incorporate built in fan speed control to minimize the audio noise. The self-diagnosis routine and the protection against OP, OC, OT and alarm indicating OV, reverse polarity to ensure the best quality and reliability.

Chroma's 63200 Series DC Loads provide a unique surge load simulation capability which allows users to overdrive the loads up to 2.7 times their rated power for short periods. This feature is ideal when the average power required by the UUT is low compared to short-term peak power demands. Plasma Display Panel (PDPs) testing is one of the typical applications, others include battery 3C discharge, breaker & fuse over rating (300% to 1000%) tests, car engine startup simulation and DC motor startup simulation.

The amount of surge loading available using the 63200 loads is related to the initial loading conditions. Figures 1 and 2 show the relationship of the initial state (Load_Low under Dynamic mode) and the maximum acceptable overdrive power. Under this operation, the load will display an Over Power Protection Alarm (OPP) and will disable the load current if the user violates the maximum surge load capability showed in the figures.

The 63200 Loads include a unique timing & measurement function allowing for precision time settings and measurements in the range of 1s to 99999s. This feature allows users to set a final voltage & timeout value for battery discharge testing and similar applications. For example, the figure below shows that the 63200's internal timer can be initiated automatically when the battery voltage falls below a preset value. The timer will continue counting until the second preset voltage value is reached.