Sper Scientific 850045 Dissolved Oxygen - DO Pen - Manual (Page 14)

1. Replace the batteries when the low battery icon
is displayed in the upper left corner of the LCD.
Use 4 new AAA batteries.
2. To replace the batteries, open (turn counter-clockwise)
the Battery Cover (Fig., 1-6).
3. Ensure the Battery Cover is secured after replacing the
batteries.
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BATTERY REPLACEMENT
14