What you need:
- CR2032 battery replacement (3V)
- Philips screwdriver
1. Shut down the hardness tester and unplug the power cable to avoid any electrical hazard.
2. Remove the back panel of the hardness tester by unscrewing the top screw at the back. It should look similar to this (depending on the model the screw placement may differ):
3. Simply remove the battery by lifting it and insert the new one.
4. Put back in place the back panel and replug the power outlet.