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8.4.2.2 Temperature Coefficient
The temperature coefficient Tkα indicates the temperature dependency of the
conductivity of a specific medium. The reference temperature is 20°C. The permitted
values are between 0.00 %/C and 5.00 %/C.
NOTE
1. The access into the MEAS. PARAMETER SETTINGS is done as described in
chapter: 8.1.
2. By pressing the „Enter-Key ↵" you switch to level: INSTALLATION FACTOR
If in the level INSTALLATION FACTOR no changes are desired, then it can be skipped
by pressing the „NEXT-Key" to go directly to TEMP.COEFF.
Enter the first of the three digits by pressing this
Then press Enter-Key ↵. Then the second field will flash.
The following two digits are to be entered analogous.
Press the NEXT-KEY.
The display changes to MEASUREMENT PARAMETER SETTINGS.
If in the level TEMP.COEFF. no changes are desired, then it can be skipped by pressing
the „NEXT-Key" to go directly into MEASUREMENT PARAMETER SETTINGS.
417101555_CoolProtect.doc
A precise measurement is substantially dependent of a precisely set temperature
coefficient. If the precise temperature coefficient of a specific medium is unknown, it
can be calculated by using the following scheme.
α
•
Set Tk
to 0
•
Bring the medium that is to be measured to a reference temperature of 20 °C
•
Note conductivity
•
Bring the medium that is to be measured to an operational temperature
•
Note conductivity
•
Calculation of the temperature coefficient as per the following formula:
κ
⎛
⎞
T
−
⎜
⎟
1
κ
⎝
⎠
[ ]
20
α
=
•
Tk
100
%
−
°
T
20
C
α
Tk
= Temperature-Compensations Factor in %/C
κ
T
= Conductivity value at operational temperature
κ
20
= Conductivity at 20 °C (Reference temperature)
T
= Operational temperature
or
this key.
- 60 -
Rev.: 08-06/10
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