Sper-scientific 850037 Large Display Conductivity Pen Bedienungsanleitung PDF herunterladen (Seite 49)

Note…

The correction is accurate only within a

limited temperature range around T1 and

T2. The greater the difference between T

and Tref, the higher the risk of error.

Calculating Temperature Coefcients (θ)

By measuring the conductivity of a

sample at temperature T1 close to Tref

and another temperature T2, you can

calculate the temperature coefcient by

using the following equation:

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APPENDICES

T2 should be selected as a typical

sample temperature and should be

approximately 10°C different from T1.

The temperature coefficients of the

following electrolytes generally fall into

the ranges show below:

Acids: 1.0 - 1.6%/°C

Bases: 1.8 - 2.2%/°C

Salts: 2.2 - 3.0%/°C

Drinking water: 2.0%/°C

Ultra-pure water: 5.2%/°C

Average temperature coefficients of

standard electrolyte solutions are

expressed as %/°C of the conductivity

value at 25°C.

T2 should be selected as a typical sample

temperature and should be approximately

10°C different from T1. The temperature

coefcients of the following electrolytes

generally fall into the following ranges:

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Sper-scientific 850037 Large Display Conductivity Pen Bedienungsanleitung Seite 49