Sper scientific 420001, Руководство пользователя

Страница: 7 / 14

7
alligator clip of the test leads connected. The indicator should read
00.0
Ω . When the leads are not connected the display will read
infinity indicated by “ OL ”. This will ensure that test lead are under
working condition.
2-4 Rotary Switch positions
Turn the Tester on by selecting any measurement
Lift
＜
1000v,500v,250v,125v (4000M Ω )
OFF 400 Ω /BZ, 1000VDC,750VAC
＞
Right
2-5 Buttons and a display Indicators
a). Button
HOLD/MAX.MIN :
Instant-pressing the “ HOLD ” button the 1st time,
the current values will be hold in the primary display., but it will return
in the 2nd pressing ; pressing 2 seconds ,it will enter directly into the
“ MAX ” status, and one another instant-pressing will switch to the
“ MIN ” , if instant-pressing once more, it will recycle ,but exit if
pressing 2 seconds again.
LOCK : In the insulation resistance testing function ,press the
“ LOCK ” button ,and then push down the “ TEST ” key, it will occur the
high-voltage and enter the insulation resistance testing status. Press
the
“ TEST ” button once more ,it will shutoff the high-voltage and exit
from the insulation resistance testing status.
TEST : In the insulation resistance testing function ,pressing and
holding the “ TEST ” button, The meter will bring high-voltage, and
enter into the insulation resistance testing, being free from the
“ TEST ” , it will cutoff the high-voltage and exit form the insulation
resistance testing.
ZERO/LIGHT : Iinstant-pressing the “ ZERO/LIGHT ” button in the 1st
time, the current values in the primary display will be set
zero,(mainly used for 400
Ω , the low resistance testing), ,it will return