EUTECH INSTRUMENTS 2700 Manuel d'instructions télécharger pdf (Page 46)

20. Calculating Temperature Coefficients

To determine the temperature coefficient of your sample solution use this formula:

Where:

tc =

Temperature coefficient 25 = 25 ºC

= Conductivity at Temp 1 C

= Conductivity at Temp 2

T1 = Tem

p 1 T2 = Temp 2

A controll

ed temperature water bath is ideal for this procedure.

1. Immerse the probe into a sample of your solution a

nd adjust the temperature

coefficient to 0% (that is, no compensation) by following instructions as

described in

Section 10—Temperature Coefficient

2. Wait for 5 minutes. Note T1 and CT1 (conductivity at T1).

3. Condition the sample solution and probe to a temperature (T2) that is about 5

ºC to 10 ºC di

fferent from T1, and note the conductivity reading C

Record your results for future reference. Ideally T1 and T2 should bracket your

measurement

temperature, and should not differ by more than 5 ºC.

4. Calculate the temperature coefficient of your sol

ution according to the formula

shown above.

5. Enter the calculated temperature coefficient into the meter.

The calculated temperature coefficient will now be applied to all the meter

readi

ngs

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EUTECH INSTRUMENTS 2700 Manuel d'instructions Page 46