APPA 607 Manuel De L'utilisateur page 62

Measuring Insulation Resistance
Select test voltage
Press the Range button to select the test voltage
(50V / 100V / 250V / 500V / 1000V)
Lock test voltage
Press the Hold button to lock the test voltage. Press the button
again to cancel the lock mode.
Make the reading stably
Press the Blue button to make the reading stably, the "Smooth"
appears on the display. Press the Blue button again to cancel
this mode.
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