• Gossen Metrawatt
  • Gossen
  • Camille Bauer


Thank you

Item number: M550P

M550P METRISO TECH 1000V Digital Insulation Tester

Compact and rugged - for service calls under harsh conditions and laboratory use
  • m550p-metrisotech-front-14080.jpg

The METRISO TECH insulation and resistance measuring instruments allow for quick and effective testing of protective measures in accordance with:

  • DIN VDE 0100
  • ÖVE-EN 1 (Austria)
  • SEV 1000 (Switzerland)
  • and regulations specific to other countries as well
  • Insulation measurement per EN 61557-2 / VDE 0413 part 2
  • Low-resistance measurement per EN 61557-4 / VDE 0413 part 4
  • Voltage testing and measurement up to 1000 V

Product Highlights

  • Digital and analogue display, backlit
  • Intelligent filter - precise and measurement-dependent activation for the measurement of very high resistances - beating, i. e. compensation of 16 2/3 Hz and 50 Hz interference - attenuation of capacitive influences from power cables, etc. - suppression of electric field influences
  • Signalling of dangerous contact voltage by means of LED
  • Indication of limit value violations by means of LED O
  • vervoltage protection - protects the instrument in the event of inadvertent connection to mains power
  • Fuse link for all resistance measuring ranges New:
  • Electronic fuse for protection of the low-resistance measurement RLO also protects the fuse link in the low-resistance measuring range in the event of faulty operation
  • One measuring point self-test with test resistance of 10 MΩ per EN 50110 / VDE 0105-100
  • Guard terminal for compensating surface current


  • Measuring ranges Riso 10 k ... 200 GΩ
  • Riso V = 50, 100, 250, 500 / 1000V R 10 O... 10 kΩ RLO :01 to 10 Ω V0 to 500 / 1000 V

Display functions

  • Backlit display
  • Limit value LED Limit (green/red)
  • Additional acoustic signal, limit value per VDE 0100 Riso, RLO
  • LED for dangerous contact voltage (when switched off) LCD symbol for external voltage
  • Battery level display
  • Special functions
  • Discharge capacitive devices under test
  • Safety shutdown (UBatt < 8 V)


  • Measuring categories CAT II 1000V, CAT III 600V
  • Measuring category CAT III 600V, CAT IV 300V
  • Integrated 10 MΩ test resistor
  • DAkkS calibriation certificate (ISO 17025) 


The insulation measuring instruments are the ideal choice  for the following tests:

  • Measurement of insulation resistance at voltage-free devices and systems, up to 1000 V
  • Testing of the resistance of earthing conductors, protective conductors and equipotential bonding
  • Checking of test objects for absence of voltage
  • Testing of electrostatic discharge capacity at floor coverings (using shielded measurement cables) - EN 1081


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