Senseca ECO 521 handleiding
Handleiding
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ECO 52x series - Handheld Conductivity Meter / EC-Meter
Measurement Basics
B-H87.0.0X.DK2-4.1 Page 15 of 24
5.5 Temperature compensation
The conductivity of aqueous solutions is temperature-dependent. The temperature
dependency varies greatly according to the type of solution. With temperature
compensation, the solution is calculated back to a uniform temperature in order to compare
it independently of the temperature. The normal operating temperature for this is 25 °C.
However, it can also be adjusted to 20 °C.
5.5.1 NLF temperature compensation according to EN 27888
For most applications, such as fish husbandry applications and measurement of surface
water and drinking water, non-linear temperature compensation for natural water NLF is
sufficiently accurate in accordance with EN 27888.
The normal operating temperature is 25 °C.
The recommended application range of NLF compensation is between 60 μS/cm and
1000 μS/cm.
5.5.2 Linear temperature compensation LIN (only available at ECO 523)
If the function of the temperature compensation is not known exactly, a linear temperature
compensation is normally adjusted in the device.
Open the Configuration menu and select the parameter TCOR. Configuration parameter LIN
and TLIN correspond to TKlin.
Put simply, this means that the temperature dependency is approximately the same over the
considered concentration range of the solution.
Temperature coefficients of 2.0 %/K are most common.
Formula LFT
ref
= LF
TX
/ ((1 + TK
lin
/ 100%) * (TX - T
ref
))
A temperature coefficient can be determined, for example, with measurement of a solution
at 2 temperatures, T1 and T2, with temperature compensation switched off.
Formula TKlin = ((LF
T1
- LF
T2
) * 100%) / ((T1 – T2) * LF
T1
)
TK
lin
= value is entered in the Configuration menu in parameter TLIN.
• LF
T1
= conductivity at temperature 1
• LF
T2
= conductivity at temperature 2
5.5.3 Compensation of weak NaCl solutions (only available at ECO 523)
Compensation of weak NaCI according to EN 60746-3 solutions in pure and ultrapure water.
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Productinformatie
| Merk | Senseca |
| Model | ECO 521 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 2462 MB |
