DML102 B&K Precision DC Electronic Load New

Specifications

• Number of Channels: 2
  
• Input Voltage: 0 to 80V
  
• Input Current: 0 to 20A
  
• Input Power: 100W/100W (200W)
  
• CV Mode Range: 0 to 6V (Low), 0 to 16V (Medium), 0 to 80V (High)
  
• CC Mode Range: 0. to 0.2A (Low), 0 to 2A (Medium), 0 to 20A (High)
  
• CR Mode Range: 0.04Ω to 80Ω (Low), 1.4Ω to 2.9 kΩ (Medium), 6Ω to 12 kΩ (High)
  
• CW Mode Range: 2W (Low), 10W (Medium), 100W (High)
  
• Transient Mode Slew Rate: 0.00004 to 0.02 A/μs (Low), 0.0004 to 0.2 A/μs (Medium), 0.004 to 2 A/μs (High)
  
• Transient Mode Minimum Rise Time: 10 μs
  
• Dimensions (W x H x D): 3.4 in. x 5.6 in. x 21.7 in. (85 mm x 142 mm x 550 mm)
  

The BK Precision DML102 80V/20A/200W 2-Channel DC Electronic Load Module is part of the versatile multi-channel modular DC electronic load system that exists in a compact bench form factor. This module populates one slot of the DML001 Modular 2-Slot Programmable DC Electronic Load Mainframe (sold separately). With five swappable modules altogether (one module included, other models sold separately), this system provides the flexibility to test a variety of power sources, including multi-output DC power supplies, batteries, fuel cells, and photovoltaic arrays.

The DML102 model includes the module only. The mainframe must be purchased separately for full functionality.

In addition to constant current (CC), constant voltage (CV), constant resistance (CR), and constant power (CW) operating modes, the DML102 features fast transient operation and sweep modes for dynamic load conditions. The intuitive front panel interface offers independent control to quickly adjust key parameters, including voltage, current, slew rate, and pulse width. Instrument settings and test configurations can be saved directly to internal memory for quick recall.

Comprehensive built-in protections and automatic power-on self-test ensure stable and reliable operation. This module is equipped with LAN, USB (USBTMC-compliant), RS-232, and GPIB interfaces, all supporting the SCPI command protocol for remote communication and control.

Operation Highlights

Modular Design
With the removable module design of the mainframe, users can choose the suitable load modules (one module included, other models sold separately) to customize the system according to their requirements. This design allows for multiple channels and is ideal for testing several units, especially power supplies with multiple outputs. At the same time, all load modules can be configured to work independently.

Adjustable Slew Rate
In constant current mode, users can control the rate or slope of the change in current in a transient response test. Set the slew rate to as slow as 0.00004 A/μs or as fast as 2 A/μs depending on the selected current range.

Operating Software
PC software is provided for generating and executing test sequences and data logging without the need to write source code. Users can log voltage, current, power measurement, and export data in a spreadsheet format for further analysis. While in the software, users can additionally configure and run transient operations, list mode programs, and more.

CR-LED Mode
Simulate the loading behavior of typical LEDs for testing LED drivers. Configure common LED characteristics including operating resistance, forward voltage, and operating current.

Battery Discharge Test
Safely discharge batteries with configurable stop conditions including voltage and time. Once a battery discharge test has started, the elapsed time is displayed with Amp-hour (Ah) and Watt-hour (Wh) measurements. The battery discharge test can operate in CC, CR, or CW mode.

Advanced Power Supply Characterization
The DML102 features three test modes specifically for evaluating the performance of DC power supplies.

Sweep Mode - The sweep mode offers a simple way to capture overshoot and undershoot of a power supply by applying two configurable load levels at a sweep frequency. The resulting maximum overshoot (Vp+) and maximum undershoot (Vp-) are displayed in real time at the frequencies of occurrence.

Protection Test - To evaluate the performance of common power supply protection features, the DML102 provides overcurrent, overvoltage, and overpower protection tests.

Maximum Power Point Test - Users can determine the maximum power provided by the power supply and the voltage/current corresponding to the maximum power.

Transient Operation
Transient operation enables the module to periodically switch between two load levels. A power supply's regulation and transient characteristic can be evaluated by monitoring the supply's output voltage under varying combinations of load levels, duty cycle, and slew rate. The DML102 is capable of simulating these conditions at rates up to 25 kHz.

Continuous Transient - Switch continuously between two load current levels where rise/fall slew rates and level width can be adjusted.

Pulse Transient - Upon receipt of a trigger signal, the load executes one pulse cycle then returns to the default load current level.

Toggle Transient -The DC load current will toggle between two levels following the receipt of a trigger signal.

List Mode
The DML102 is highly configurable for generating precise load sequences with up to 100 user-programmable steps. Step parameters include current limit, duration, and slew rate. The list mode programs can be set to repeat up to 65,535 times or indefinitely.

Automatic Test Mode
Automatic test mode enables the system to execute multiple test sequences. Up to 100 different sequences can be linked to run steps of various operating modes and loading conditions. Each step can be programmed with upper and lower pass/fail limits.