KYORITSU 3131A - Manual (Page 5)

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2. Features
MODEL-3131A is an analogue insulation tester with five ranges for insulation
resistance measurement and continuity testing (resistance tests) of low voltage
installations.
● Designed to safety standards:
IEC 61557-1(General requirements for measuring equipment for low voltage
distribution systems)
IEC 61557-2(Equipment for insulation resistance measurement for low
voltage distribution systems)
IEC 61557-4(Equipment for resistance tests for low voltage distribution
systems)
● Dust and drip proof constrution to IP54
● Three insulation test ranges : 250V/100MΩ, 500V/200MΩ, 1000V/400MΩ
● Two continuity test ranges : 2Ω, 20Ω
● Back light function to facilitate work at night or dimly lit locations
● Easy for battery check
● Power-on indication LED lighting during battery check and measurement
● Live circuit warning indication with LED lighting and the buzzer sound
● Fuse protected.
● Color coded scales and range switch position for easy reading
● Uses only 6× 1.5V battery type R-6, AA or equivalent