Iso-Tech IDM 98-III Instruction Manual page 7

Smart HOLD
The meter will beep continuously and the display will flash if the measured
signal is larger than the display reading by 50 counts.
Smart Hold will not be activated if the hold value is not scrolled over 50
counts when measuring AC or DC Voltage /Current with Auto-V(LoZ)
Range.
VoltSense
Press and hold down the "VoltSense" button down to activate the
VoltSense function.
CAUTION
The number of dashes displayed indicates the electric field strength.
Be aware, if no indication, voltage could still be present
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IDM 98III / 99III English IDM 98III / 99III English
Backlight
Press the Backlight button to turn the backlight on/off.
Disable Auto Power Off
Reactivate the instrument by rotating the switch or by pressing any button.
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