HR 30

 HR30 High Resolution dc/ac Clamp-on mA Current Probe for  Oscilloscope & Automotive uses

  • CE-mark Certificated.
  • Compatible with any volts measuring DMM.
  • Range and resolution capable of displaying 100mV output per A.
  • 30A dc/ac current measurement capability with 1mA resolution and a reading accuracy of 1%.
  • DC A Zero Adjustment thumbwheel.
  • Low-battery indicator.
  • Maximum conductor size: Ø 19mm (0.75).
  • Insulated BNC adapter for oscilloscope uses.
  • Hand guard design.
  • EN61010-1 & EN61010-2-032; CAT III 1000V & CAT IV 600V.


Effective Frequency Range : dc to 20 kHz(0.5 db)
System accuracy : Current clamp accuracy +                                  OSCILLOSCOPE / MULTIMETER                                  accuracy
Current Clamp Accuracy (dc to 20 kHz)
       Current range : 20 A ac RMS or dc
       Measuring range : ±30 A

       Output sensitivity : 100 mV/A

       Accuracy : ±(1% of reading + 2 mA)
       Maximum Resolutin : 1 mA dc/ac
       Minimum Measurement : 5 mA dc/ac
di/dt Tracking Capability : >20A/
Conductor Position Sensitivity : ± 1% relative to center reading
Load Resistance : 10 typicaL
Temperature Coefficient : 0.1 x (specified accuracy)
                                           per degree C.
                                           (0 °C to 18 °C, 28 °C to 50 °C)
Pollution Degree : 2
Safety : Installation Category CAT IV 600V and CAT III 1000V




  The Probe is a specially designed high resolution clamp-on dc/ac mA   current probe which will allow your oscilloscope / multimeter to measure   low electrical / electronic current up to 30A dc/ac with 1mA resolution and   a reading accuracy of 1%. With the clamp, there is no need   to break a   circuit or to affect the isolation.
  The extended measurement jaws allow performing measurements in a   narrow space. When measuring dc current, a simple thumbwheel on the   probe is designed for zero adjustment.

  For troubleshooting the electric or hybrid electric vehicles, current   measurement(especially without interrupting the supply from the battery or   other current carrying conductors) is more important and effective than   voltage measurement from a technical, economical and process point of   view.

  The more important or essential checking points in electric or hybrid   electric vehicles than those of the conventional vehicles are as follows:

  • Battery leakage current (nomally around 15mA), when all systems are     turned off, which is used as a quality indicator in an Electrical Check     Out System for production line quality assurance testing or as a fault     identifier for the diagnostic units in large service centers.
  • Current drain of the ECU controlling the ISG(or ISA) system, which is as     low as 10mA when ignition is turned off, should be measured without     disconnecting the battery cable to prevent the ECU from losing the     stored data.

      Rapid waveform tracking is also a key feature of this specially designed   low current probe making it useful, for example, for displaying and   adjusting currents in electronic fuel injectors. This probe has a frequency   range of dc to 20kHz and a di/dt tracking capability in excess of 20A/.


  • User's Manual download


    Please contact us for more information at;

    Tel : +82-32-837-5777 
    Fax : +82-32-837-5776 

    E-mail :

                          Copyright(c) 2009 FINE INSTRUMENTS CORP. All rights reserved.