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Idiomas disponibles
T = measured temperature (°C)
T
= Reference temperature (20 °C or 25 °C)
Ref
Each sample has different temperature behavior. For pure salt solutions the correct coefficient can be found in
literature, otherwise you need to determine the
temperatures and calculate the coefficient by using the formula below.
T1: Typical sample temperature
T2: Reference temperature
GT1: Measured conductivity at typical sample temperature
GT2: Measured conductivity at reference temperature
Non-linear
The conductivity of natural water shows strong non-linear temperature behavior. For this reason, use the non-
linear correction for natural water.
The measured conductivity is multiplied by the factor f
thus corrected to the reference temperature of 25 °C:
G
= GT · f
T25
25
If another reference temperature is used, for example 20 °C, the conductivity corrected to 25 °C is divided by
1.116 (see f
25
GT
= (GT · f
20
Note
Conductivity measurements of natural water can only be performed at temperatures ranging from 0 °C to 36
°C. Otherwise, the warning message "Temp. out of nLF correction range" appears.
TDS factor
TDS (Total dissolved solids) is calculated by multiplying the conductivity value with the TDS factor. A factor
between 0.40 and 1.00 can be entered.
6.8 Endpoint formats
Auto
With the automatic endpoint the selected stability criterion determines the end of an individual reading
depending on the behavior of the sensor used. This ensures an easy, quick and precise measurement.
1 Place sensor in the sample.
2 Press READ.
A appears on the display.
The measurement ends automatically when the measured value is stable.
If READ is pressed before the signal is stable, the endpoint format changes to manual
Manual
Unlike Auto, user interaction is required to stop the measurement reading in manual mode.
1 Place sensor in the sample.
2 Press READ.
M appears on the display.
appears on the display to signalize measurement stability.
3 Press READ to end the measurement.
Timed
The measurement stops after the set time, which can be set between 5 s and 3600 s.
1 Place sensor in the sample.
2 Press READ.
T appears on the display.
appears on the display to signalize measurement stability.
The measurement ends automatically when the set time period expires.
22
Menus and settings
for 20.0 °C)
)/1.116
25
-coefficient by measuring the conductivity of the sample at two
for the measured temperature (see "Appendix") and
25
appears.
appears.
.
appears.
SevenGo Duo pro™
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