Cell Constant; Temperature Compensation Coefficient - Burkert 8225 Notice D'utilisation

4 OPERATION
UNIT
ENTER
ELEC CST

4.3.3 Cell Constant

The cell constant of the sensor is entered within this mode. This value is indicated on a
sticker on the enclosure and on the sensor cable.
ENTER
ELEC CST
ENTER
T ° COEFF
4.3.4 Temperature-Compensation Coefficient
The transmitter offers three different modes of temperature compensation.
Linear compensation
The user enters one value for a compensation over the entire conductivity and temperature
range (e.g. 2,1 %/ °C). For no compensation enter 0,0 %/ °C within this option.
Compensation with memorized coefficient (AUTO)
The user can select between 4+2 products, whose temperature compensation coefficients
have been memorized over the entire temperature range (NaOH, HNO
"special" and "H2O pure"). The memorized coefficients for NaCl apply for concentrations
between 0.5 mg/l up to 270 g/l. In most cases, the compensation with NaCl is sufficient.
Option "H2O pure" can be used to compensate the temperature of pure or ultra pure water.
Option "special" is explained in the following part.
Teach-in function
This function allows the practical definition of the temperature compensation coefficient of
a liquid over the required temperature range. The user enters first the temperature range (T-
and T+) of the fluid (the difference between T+ and T- must exceed 5 °C). The point 25 °C
needs not be included, however, it must be exceeded during the measurement.
S
mS
MOhm
KOhm
ENTER
TDS
KTDS=0.00
Enter KTDS value
K=00.0000
The cell constant is an average value over the whole
measuring range. This can be adjusted depending on the
application as follows:
K-new = (Cond. reference / Cond. 8225) x K-real.
0......9
The reference conductivity can be given either by a buffer
solution or reference device.
If K=00.0000, the device is blocked and the displayed
K=01.0300
conductivity is equal to zero.
E-36-
CONDUCTIVITY 8225
DEC PT 0
ENTER
DEC PT 1
0......9
DEC PT 2
DEC PT 3
, H
3
ENTER
CELSIUS
FAHRENH
ENTER
SO , NaCl,
2 4