Model PH220 Version 3.1 11/2005
7
Battery Replacement
The 9 volt alkaline battery that powers the instrument requires replacing when all battery
icon ‘fill bars’ are depleted. To replace the battery follow the steps below:
1.
Disconnect the electrode from the instrument.
2.
Remove the instrument’s protective jacket by pulling it over the top of the meter
(ensure that the electrode is disconnected).
3.
Pry the battery compartment up from the top of the meter using a screwdriver or
coin at one of the two indentations (see diagram).
4.
Replace the 9V battery.
5.
Insert the battery compartment into the instrument until the compartment is flush
with the top of the instrument. The compartment can only be fully inserted in one
direction and the battery compartment is labeled as to the polarity orientation of the
battery.
6.
Replace the protective holster.
