Calculation Of Conductance At 25 ° C - Testo 252 Bedienungsanleitung

Temperature variation of the Testo conductivity standard 1413 µS/cm
Temperature Conductivity
in °C of the
standard
solution
0 0.776
1 0.800
2 0.824
3 0.848
4 0.872
5 0.896
6 0.921
7 0.945
8 0.970
9 0.995
10 1.020
11 1.045
12 1.070
13 1.095
14 1.121
15 1.147
16 1.173
17 1.199
Calculation of conductance at 25 ° C
For an approximate conversion of a conductivity
value, measured at any temperature, into the value
at reference temperature (e.g. 25 ° C), the
temperature coefficients should be used according
to the following equation (see also
DIN 38404, section 8):
κ − κ
ΤΜ
α
=
κ
TR
TR
α
Temperature coefficient at +25 ° C
TR
T Reference temperature (25 ° C)
R
T Measured temperature of the measuring solution
M
κ
Electrical conductivity at reference temperature
TR
(25 °C)
κ
Electrical conductivity at a measured temperature
ΤΜ
Temp. coeff. Temperature
of the
standard sol.
referred to
25 °C
1.80
1.81
1.81
1.82
1.82
1.83
1.83
1.84
1.84
1.85
1.85
1.86
1.87
1.88
1.88
1.88
1.89
1.89
1
TR
•
Τ
- T
M R
Conductivity
in °C of the
standard
solution
18 1.225
19 1.251
20 1.278
21 1.305
22 1.332
23 1.359
24 1.386
25 1.413
26 1.441
27 1.469
28 1.497
29 1.525
30 1.553
31 1.581
32 1.610
33 1.638
34 1.667
Appendix
• 100%
Temp. coeff.
of the
standard sol.
referred to
25 °C
1.90
1.91
1.91
1.91
1.91
1.91
1.91
—
1.98
1.95
1.96
1.96
1.97
1.98
1.98
1.99
2.00
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