Constant Current DC Load Tester with Wireless Cell Monitoring – SLB-Series

Common applications include but are not limited to:

• DC Generator Systems
• DC Battery Systems
• UPS Testing
• Rectifiers
• Power Supply
• Power Converter Units
• Standby Generators
• Diesel and Gas Turbines
• Micro-turbines
• Wind Generators
• Solar Arrays
• Electrical Distribution Systems
• Circuit Breakers
• Other Electrical and DC Power Supply Testing

Load testing is the only verifiable method to determine the actual capacity of your battery strings.

As important as string load testing is, without individual cell monitoring you can’t identify why your string failed. DAC are vital to load testing because they capture each cell’s performance from beginning to end. This enables us to target weak cells for replacement. By replacing only weak cells we ensure a healthy string that remains in service longer. DACs also save money by allowing technicians to perform other duties instead of taking cell measurements every 15 minutes. This prevents user error, increases productivity, and gives us quality measurement data to make decisions.

DACs are connected to the positive terminals of each cell by robust alligator clips. The clips connect to wiring harnesses which power the DACs. The DAC then wirelessly transfer the data to the SLB unit.

DAC get their power from the batteries they are connected to. They require a minimum of 8V and use 30mA for operation.

Each SLB comes standard with Dataview software. This software allows us to live monitor, view test data, and export reports to Microsoft Excel.

No problem! All cells and information can be viewed on the LCD screen of any SLB.
Test data can be exported via USB flash drive then to PC for report creation.

Yes! DACs work with every SLB model.

Similar to all electronics life expectancy varies based on use and abuse. Our average lifespan for DAC is 5+ years!

Absolutely. Standard 48V/125V DAC kits can be bought anytime for pairing with an SLB. In
addition, you can purchase extra DACs for testing on 1.2V systems.

DAC data is captured in real-time and depending on distance from the tester, data is transmitted every 5-10 seconds.

Testing can be stopped in various ways. The user is able to manually stop the test at any time. The test will auto-shutdown if any of (4) programmable parameters are met. These parameter settings are based on time, capacity, low string voltage, and low cell voltage. Each SLB is further equipped with safety features that will result in test shut down; overload circuit breakers and fused input VAC surge protection.

Yes, the SLB can be used for several supportive duties by using the optional current clamp described below.

Yes, although we always recommend that the SLB be used in offline applications. This is
because an offline(disconnected) string prevents the impact of an active external load and
protects the string from being overly discharged in the case of an outage event. This could
cause system failure and catastrophic damage to the string.

The SLB-Series utilizes DACs (data acquisition cases) to connect to each cell. The DAC includes a wiring harness that connects to the cells. Each DAC communicates back to the SLB load bank wirelessly.

The exact power consumption of an SLB varies with model and discharge current, however expect the draw to be less than 9A at max current. A 15A circuit breaker is sufficient for power needs.

Please see ‘How is a discharge test stopped?’ for an overview of the safety features

The internal storage is 16MB. This generally will hold several tests. The exact amount will vary with different string sizes and discharge durations. We recommend transferring data to the software database after testing.

The SLB transmits data by RF at the frequency of 433M Hz.

The optional current clamp is used for special testing. Assistive discharge is most common. In this role the SLB is used to add supplemental current to another discharging non-SLB load bank. The SLB will measure the discharge from the external load bank and supply the necessary current to reach max discharge. In an external discharge test the SLB will act in a data logger capacity and record a discharge event. Finally, in charge monitoring the SLB acts in a data collection role to record cell voltages and float charge.

Parallel can be used between to SLB-Series load banks. It allows for a main unit to operate
both machines to increase current output.

Depending on the battery type either 4 or 12 batteries. DACs can connect 12 1.2V, 2V, and 4V cells. 4 cells can be connected for battery types 6V & 12V..

One SLB can connect up to 600 cells. This amounts to either 50 1.2, 2, 4V DACS or 150 6V and 12V DACS. In other words, it should work for any conceivable application!

Currently the SLB supports up to 4GB USB drives.