ADWA AD 310, User Manual, Page: 14 / 14

14
TEMPERATURE COMPENSATION
Three options are available for temperature compensation:
1. Automatic (ATC): the supplied probe features a built-in
temperature sensor, which provides the temperature
reading to automatically compensate the EC (
AD310 )
or TDS ( AD410 ) measurement (from -9.9 to 120.0 °C),
also using the selected reference temperature.
2. Manual (MTC): the temperature value can be manually
set using the arrow keys. The compensation is referenced
to the selected reference temperature. While in MTC
mode, the °C tag blinks on the LCD.
3. No compensation (NO): the temperature is not taken
into account. The reading displayed on the LCD is
the actual EC (
AD310 ) or TDS ( AD410 ) value.
Notes:
• The default compensation mode is ATC.
• Temperature compensation setting can be
accessed by entering the setup mode and
selecting the “tcE” item (see “Setup” section for
details).
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• If the temperature compensation is active,
measurements are compensated using the
temperature coefficient (default value 1.90 %/°C).
To change the temperature coefficient, enter the
setup mode and select the “tc” item (see “Setup”
section for details).
• If the temperature reading is out of the -9.9 to
120.0 °C interval and the ATC option is selected,
the temperature full scale value will be displayed,
together with the °C tag blinking.
• The reference temperature can be set at 20.0 or
25.0 °C. When the reference temperature is
changed, the temperature coefficient must be
manually adjusted by the user.
For example, if
α
is the coefficient with reference
temperature of 25 °C, if changing the temperature
to 20 °C, the new coefficient can be calculated
with the following formula:
β
=
α
/(1-
α
/20)
If
α
=1.90%/°C, then
β
=2.10%/°C.