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２．Features
KEW3021A/3022A/3023A 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: 40
Ω
and 400
Ω
(2-range auto) are also
available. Buzzer sounds when a measured current exceeds
200mA.
This instrument has 0
Ω
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
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