ECHO Series Ultrasonic Thickness Gages
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You may also use a computer instead of the wall charger to charge the gage, but this will
take significantly more time than using an AC outlet. If you decide to charge the gage
using this method, make sure the gage is powered off before you connect the USB to the
computer and to the gage itself.
When charging is complete, the F4 key will appear translucent in color. Power off the
gage, and unplug the charger from the USB connector on the top of the gage.
Using Non-rechargeable AA Batteries
A non-rechargeable alkaline AA pack is also available. This option requires a spare tray
and 3 AA batteries. Follow these steps to insert non-rechargeable batteries:
1. Un-screw the battery door.
2. Disconnect the Li-Ion battery connector.
3. Plug in the AA tray connector.
4. Replace the battery door and tighten screws.
Note: When using the 3 AA battery tray, batteries cannot be re-charged.