If you have a Bluelab pH or conductivity pen, use this guide to change the batteries
Bluelab pens are powered with 1 x AAA alkaline battery. Don't use rechargeable batteries. A low battery warning is indicated by a battery symbol appearing on the screen. Only remove the battery cap when it requires changing. Battery life is expected to be 350 hours.
To change the battery in the Bluelab pH Pen, Soil pH Pen or Conductivity Pen, follow the steps below.
1: Remove the old battery
Undo battery cap fasteners with a screwdriver. Remove the battery cap and tip out the old battery.
2. Check for corrosion
Flat batteries may leak and cause corrosion. Check battery contacts and the battery for signs of corrosion. Battery contacts should be cleaned first if corrosion is found before proceeding to step 3.
3: Fit new battery
Insert the new battery positive end (+) down into the body.
4. Ensure waterproof battery cap seal is clean
The seal will fail if dirt is present or the seal is not properly in place.
5: Replace battery cap
Tighten the fasteners on battery cap until there is no space left between the cap and body. This ensures the unit stays 100% waterproof.
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