SELECT Disables automatic power-off function Display shows PoFF until the button is released
ENTER Disable Beep function

Automatic Power Off:
The Meter has an automatic power-off function(Sleep mode) to conserve battery power .if there is no function change or button press for 10 minutes. The Meter comes out of Sleep mode when a key is pressed or when the rotary switched is changed.
To disable the Sleep mode, hold down the SELECT button while turning the Meter on. Sleep mode is always disabled in the insulation test mode, or if the auto power-off feature has been disabled by pressing the SELECT button when the Meter is turned on.

Hold Function:
Press the Hold button to freeze the displayed value. Press again to release the display.

Relative Measurement:
Show the difference between the actual value and the relative base.
Press REL Button to enter relative measurement and the meter will record the initial value when pressing the key.

Displayed value = Actual value -Initial value
Press REL Button again to exit relative measurement. Press SELECT button to view Initial value, when the Initial value is invalid, display.

Features:
Design according to the IEC61010-1CATIII 1000V CAIV 600V
Auto Calculate PI and DAR
Store /Load Function
Compare function
Auto discharge for capacitive load
Timer Function for insulation test
Lock function for insulation test
Low Battery Indication
DCV and ACV Test
Continuity test
Auto power Off
Digital and analog display