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Highly efficient power supply and backup power supply solutions to telecommunications, information and industrial technologies.

Battery tester RZ-120

The RZ-120 Regulated Load is designed for capacity testing of battery sets with nominal voltage of min 24 VDC and NiCd, Pb, NiMh 1.2, 2, 4, 6, 8, 10, 12 and 16 V cells. Thanks to the high maximum operating voltage it is possible to use this battery tester for a wide range of battery string voltages.


  • Identification number set manually (can be modified after measurement)
  • End of measurement – manually, time interval, total voltage of battery string, voltage of batter blocks, number of faulty blocks, discharged capacity (possible to combine different conditions)
  • Type of test – constant current or constant power
  • Required value for battery discharge
  • Sampling interval of 1 – 60 minutes

Values available during measurement

  • Passed and remaining time of capacity testing
  • Total voltage of battery string
  • Actual current
  • Actual power
  • Discharged capacity
  • Temperature measured by each module
  • Voltage of individual battery blocks (possible to sort by order or voltage)
  • Possibility to read and change selected parameters

Values available after measurement

  • Possibility to read the values of individual measurements and change parameters directly on the display, without the need of a PC when in the field
  • Overview of memory usage

 Universal use

  • Wide range of input voltage 24 to 800 VDC or 600 VAC
  • Compact size and low weight
  • Allows for use of up to 12 measurement modules with a total of 288 inputs for measuring the voltage of battery blocks
  • Possible to use also without measurement modules (e.g. as a testing load for DC and AC power systems)
  • Minimized conductor length and improved safety thanks to wireless data transfer among modules
  • Possibility to change the number of measurement modules prior to the start of capacity testing
  • Maximum time of measurement up to 24 hours
  • Easy and intuitive control
  • PC connection via USB

 General features - power module

  • Components designed for operating voltage of max 800 VDC
  • Possibility to connect power input to DC (or AC) voltage regardless of polarity
  • Power input protected by a changeable fuse
  • Exchangeable modules ZA 100/24, ZA 400/24, ZA 800/24, for 3 different ranges of input voltage
  • Load powered directly from the tested set and reduntantly from 230VAC mains
  • Backlit touchscreen LCD display (160 x 104 pixels)
  • Control board and LCD display galvanically isolated from the parts under dangerous voltage
  • Adjustable parameters to prevent deep discharge of batteries
  • Battery discharging using constant current or constant power
  • Measured data stored in internal memory
  • PC Software for download and processing of measured data
  • Forced cooling

 General features - measurement module

  • 24 inputs for voltage measuring (max. 20 V / input)
  • Measuring inputs equipped with protection against overvoltage and reverse polarity
  • 1 x temperature measurement
  • Power supply input galvanically isolated from measuring inputs
  • Power supplied from the tested set or separate DC power supply
  • Wireless data transfer system


  • Functional and capacity testing of batteries
  • Load testing of DC and AC power supplies