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

4 OPERATION

4.3.2 Engineering Units

ENTER
UNIT
ELEC CST
The conductivity can be displayed in any engineering unit with 0, 1, 2 or 3 decimal points
but always with 4 digits.

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
T ° COEFF
ENTER
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+1 products, whose temperature compensation coefficients
have been memorized over the entire temperature range (NaOH, HNO
"special"). 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. The 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.
8225-COMP-**
µ S
ENTER
m S
MO hm
KO hm
The cell constant is an average value over the whole
K = 00.0000
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-17-
CONDUCTIVITY 8225
DEC PT 0
DEC PT 1
0......9
ENTER
DEC PT 2
DEC PT 3
ENTER
AUTO AUTO
AUTO AUTO)
°CELSIUS
°FAHRENH
, H SO , NaCl and
3 2 4