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2 Installation
To start using your Sentron SI pH meter for the first time you will need to connect a probe to the meter
and remove the battery isolator. In the sections below you will find instructions on how to do this. In
the Batteries section you will also find instructions for charging and replacing batteries.
2.1 Batteries
2.1.1 First time use
The SI meter is delivered with three pre-installed pre-charged AA rechargeable batteries. To activate
the meter for the first time, pull the plastic strip (battery isolator) out of the battery compartment and
press the power button.
2.1.2 Recharging batteries
When fully charged, the three AA rechargeable batteries with which the Sentron SI meter was shipped
provide 7 hours of operating under normal use.
To recharge the batteries, connect the meter to the power adapter using the supplied USB cable and
place the power adaptor in a power outlet. The meter will recharge in approximately 7 hours.
In case the meter batteries are empty and will not be recharged soon, remove the batteries.
2.1.3 Replacing batteries
The three AA batteries required for operation of the meter are replaceable. The rechargeable batteries
may lose capacity over their lifetime and replacement may be necessary when operating time on a
battery charge becomes too short. When replacing the rechargeable batteries, only batteries supplied
by Sentron should be installed. To replace the batteries, open the battery compartment cover by
turning the half turn screw counter clockwise and pulling the bottom of the battery cover outwards.
When inserting the batteries ensure the orientation of the batteries have the c and - alignment
as indicated in the figure below.
