Setting A Temperature Coefficient - Testo 252 Bedienungsanleitung

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Conductivity measurement
Preparing a conductivity measurement

Setting a temperature coefficient

In order to achieve comparable measuring results,
a conductivity value, measured at a
certain temperature, is converted in relation to the
reference temperature. The specific temperature
coefficient of the measuring solution must,
therefore, be stored in the instrument before the
beginning of each measurement (
coefficients of several selected solutions" in the
appendix)
If the reference temperature (trEF) in the
configuration menu is changed the
temperature coefficient is automatically
converted to the new reference
temperature.
tC=nW (natural water is only possible at
trEF= 25 °C)
(cf. configuration menu from page 12 on)
Once you have entered the measuring mode,
press the arrow key. If the infrared printer was
activated (Yes ir") in the configuration menu press
the arrow key twice.
"%/°C" flashes to indicate that you have selected
the alteration mode for the temperature coefficients
Confirm the selection of this mode with Enter.
The abbreviation tC for temperature coefficient
appears.
Alter the value according to your knowledge,
otherwise enter the standard value (see table
"Temp. coefficients of several selected solutions").
Otherwise enter 2.2 %/° C as a "good mean value"
for solutions with an unknown temperature
coefficient; "nW" is the setting for
measurements in natural water (appears after next
highest value after 10.00 %/°C). The setting "nW"
is only possible with a set reference
temperature trEF=25°C.
Confirm the entry with Enter.
The measuring instrument automatically enters the
measuring mode.
Table "Temp.