Battery Replacement; Warranty - Extech Instruments 407303 User Manual

RS-232 PC Interface
This meter is equipped with an RS-232 PC Interface jack. The jack is located at the top of
the meter next to the sensor input jack. The interface is intended for use with the data
acquisition software and hardware kit. For more information contact Extech or refer to the
Software User Manual.

Battery Replacement

The low battery indicator LBT appears on the LCD when the battery runs low. To replace
the battery:
1. Remove the meter's rubber protective cover to access the rear battery compartment.
2. Pry open the battery compartment cover using a small coin or screwdriver.
3. Replace the 9V battery and attach the compartment cover and protective holster.
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