koban KRA-4000M Manuel D'instructions page 58

3. INSULATION RESISTANCE MEASUREMENTS
a)Turn the function switch from the "OFF" position to the left
4000
（
MΩ/250V---1000 MΩ/125V ） ,and chose one of the
voltage-block( there are 4 ranges namely, 4 MΩ40 MΩ400
MΩ4000 MΩ, can be switched automatically for every
voltage-block.)
b)Connect two testing lines to the tested；
c)Push down and hold the "TEST" button /or press the
" LOCK" keystoke first and then the "TEST" button, if the
tested is electriferous and its voltage ( AC/DC) is over 30V,
it will refuse work and no high-voltage testing occurs,
simultaneity, it shows ">30V" on the LCD, the symbol
" " flashes, and the buzzer warns frequently. if the
tested is diselectriferous or its voltage is lower than 30V, it
will enter into the formal testing process and brings the
high-voltage. on the primary display, the insulation
resistance in MΩ is indicated in-phase with analog bar; on
the secondary display, the tested insulation voltage in V
(DC) is indicated, the symbol "
buzzer warns frequently
d)Being free from the "TEST" button or pushing down the
"TEST" button in the "LOCK " status can exit from the
"LOCK" status and shutoff the high-voltage， synchronously,
the resistance values is indicated in the primary display
will be held, and the secondary display still be in the
status of monitoring the insulation voltage for the tested.
e)Subsequently, discharge the balance insulation voltage of
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DIGITAL INSULATION TESTER
MΩ/1000V---4000/
KRA-4000M
MΩ500V---4000
" flashes and the
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