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5
Measurements
5.1
Insulation resistance measurements
•
Turn the function switch from the 'Off' position to the
left (1000 V, 500 V, 250 V, 100 V), and select one of the
voltage-blocks (there are 4 ranges: 4 MΩ, 40 MΩ, 400
MΩ, 4000 MΩ, that will be switched automatically for
every voltage-block)
•
Connect two testing lines to the tested
•
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 30 V, it will refuse work and no high-voltage testing
occurs, simultaneity, it shows '> 30 V' on the LCD, the
symbol '
•
If the tested is diselectriferous or its voltage is lower
than 30 V, 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 ' '
flashes and the buzzer warns frequently
•
Being free from the 'Test' button or pushing down the
'Test' button in the 'Lock' status can exit from the 'Lock'
status and shut off 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
•
Subsequently, discharge the balance insulation voltage
of the tested through the inner switch of the meter
•
Turning the function switch can exit automatically from
testing status during the process
' flashes, and the buzzer warns frequently
25
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