METRISO BASE

Item number: M550O

Test Instrument for Insulation, Low-resistance and Voltage Measurements

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

• DIN VDE 0100 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 500 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
• Overvoltage 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 MO per EN 50110 / VDE 0105-100
• Guard terminal for compensating surface current

METRISO BASE Article number M550O

• Measurements Measuring ranges Riso 10K to 100 GΩ
• Riso v = 50, 100, 250, 500
• R 10 O to 10 KΩ
• RLO .01 to 10 Ω 
• V 0 to 500

Display functions

• Backlit display Limit value LED
• Limit (green/red)
• Additional acoustic signal Riso, limit value per VDE 0100 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)

Features

• Measuring category CAT III 600V, CAT IV 300V
• Integrated 10 MΩ test resistor

Applications

The insulation measuring instruments are suitable for the following tasks:

• Measurement of insulation resistance at voltage-free devices and systems, up to 500 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