Welcome to Dranetz USA
Dranetz USA Home PageDranetz USA ProductsAbout Dranetz USADranetz USA NewsContact Dranetz USA
Gossen Metrawatt
Handheld Multimeter with Inter-turn Short-circuit Detection and Insulation Test Capability
Gossen Metrawatt METRAHIT COIL

The METRAHIT COIL Electric Motor Tester performs inter-turn short-circuit measurements in combination with the Coil Test Adapter (Included). This 4¾ place multimeter, was designed for insulation and motor coil testing for service applications on industrial electric forklifts, electric trucks and applications which are powered by electric polyphase motors.

The testing is achieved by comparing the measurement results of the asymmetries in motor coils, which, in turn, is an indication of possible short-circuits.

Inter-turn short-circuit measurement in the inductance range: 10μH to 50mH @ 100H


  • Insulation resistance measurement up to 3.1 GW with interference voltage detection, test voltages: 50V, 100V, 250V, 500V, 1000V
  • Multimeter with diverse functions: (V, W, F, Hz)
  • TRMS measurements: TRMS AC / AC+DC for curren /voltage up to 10 kHz
  • Features a low-pass filter, 1 kHz/–3 dB in the VAC range
  • Direct current measurement , 100nA to 10A
  • Current measurement with clip-on current sensors – the clip has two user selectable transformation ratios of 1mV:1mA or 1 mV:1, which are shown on the display.
  • Precision temperature indicator, °C or °F, for Pt100 / Pt1000 sensors and type K thermocouples
  • Diode measurement (IK=1 mA, U flow to 5.1V) and continuity testing
  • Duty cycle measurement, 5 to 95% (METRAHIT COIL only)
  • Display: Illuminated 3¾ digits, 3100 steps.
  • Acoustic signals for: continuity testing, dangerous contact voltages, and exceeded overload limits
  • Min-Max value storage
  • Data memory, and internal clock, and power pack adapter socket
  • IP 54 Housing protection, dust and splash protected, and protective cover
  • Bidirectional infrared interface for exchanging data with a PC
  • Windows software available as accessory for processing and
    graphic display of measured values via USB interface



METRAHIT COIL with COIL TEST ADAPTER provides detection of an inter-turn short circuit in multi-phase drives, by means of comparing the measured values for the motor coils, and detection of an unbalanced condition.


  • 1 Insulation multimeter METRAHIT COIL
  • 1 Protective rubber cover
  • 1 Pair of safety measurement cables with 4 mm test probes,
      1000 V CAT II, 600 V CAT III (KS17-2)
  • 1 Condensed operator instructions, English/German
  • 1 Operating instructions in English and German (CD ROM)
  • 1 DAkkS calibration certificate (ISO17025)
  • 2 Batteries, 1.5 V, type AA, installed
  • 1 COIL TEST ADAPTER for inter-turn short-circuit measurement
    (only in combination with METRAHIT COIL)


Part Number: M246C
METRA COIL Operating Instructions

METRA COIL Technical Data
METRA COIL Appications Note (PDF)
For more Gossen Metrawatt products and accessory information:
Contact Dranetz at 1-800-372-6832
Email: sales@dranetz.com



Contact Dranetz USA