4
INTRODUCTION
AD310
and
AD410
are portable microprocessor-based
instruments for measuring EC or TDS, and temperature.
The autoranging feature of the EC and TDS readings
automatically sets the instrument to the scale with the
highest resolution.
Measurements are compensated for temperature
effect automatically (ATC) or manually (MTC).
The temperature compensation feature can also be
disabled to measure actual conductivity or TDS.
The temperature coefficient is user selectable.
The instruments also feature a measurement stability
indicator.
25
BATTERY REPLACEMENT
When batteries become weak,
the battery symbol lights up.
It is recommended to replace the
batteries soon.
When the battery level is too low to ensure reliable
readings, the meter automatically turns off.
Battery replacement must only take place in a safe area
and using the battery type specified in this instruction
manual.
To replace rundown batteries,
remove the battery compartment
cover on the rear of the meter and
substitute all four 1.5 V AA alkaline
batteries with new ones, while
paying attention to the correct
polarity.
Reattach the battery compartment
cover.