KYORITSU 3023 - Manual (Page 5)

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２．Features
KEW3021/ 3022/ 3023 are four-range digital insulation resistance
testers for testing low-voltage installation below 600V.Resistance
measurement with audible Continuity check function is also available.
¡ Designed to following safety standards:
IEC61010-1(CAT.III 600V Pollution degree 2)
IEC61010-031 (Requirements for hand-held probes)
¡ Small and light weight.
¡ Auto-discharge function
When insulation resistance like a capacitive load is measured, electric
charges stored in capacitive circuits are automatically discharged
after measuring. Discharge can be checked with the LED &
mark on LCD.
¡ Two resistance ranges: 40Ω and 400Ω (2-range auto) are also
available. Buzzer sounds when a measured current exceeds
200mA.
¡ This instrument has 0Ω ADJ. function to null the resistance of test
lead or fuse at resistance measurement.
¡ Measured value is held for about 5 sec. after insulation/ resistance
measurement of the Test button is released.
¡ Backlight function to facilitate work at night or dimly lit locations.
¡ Bar-graph to indicate measured results
¡ Max. 99 data can be saved to the internal memory at the insulation
resistance range.
¡ Visible and audible warning ( or is indicated and buzzer
sounds) when the measured insulation resistance exceeds the pre-
set value.
¡ Live circuit warning indication, LED and buzzer.
¡ The Safety key must be kept pressed down to select 500V or 1000V
range. Otherwise, neither 500V or 1000V range can be selected.
¡ Auto-power off function
To prevent the instrument being left powered on and conserve
battery power, the instrument automatically turns off approx. 15
min. after the last switch operation.
¡ The mark flickers when the battery voltage drops to the lower
limit.
¡ Test leads with remote control switch (voltage won't be outputted
when the test lead is not connected.)
¡ Robust housing case
¡ Neck strap for both hand's operation
¡ User-changeable test prod