Swann AMI Deltacon DG, Руководство оператора, Страница: 12 / 86

A-96.250.491 / 190121
AMI Deltacon DG
Product Description
12
Cation Con -
ductivity (Acid
Conductivity)
The alkalization agent is removed in the cation column. All cationic
ions are exchanged with H+, all anionic impurities (ions with negative
charge) pass through the column unchanged.
Degassed
Conductivity
After the heat exchanger the sample is heated up to 0.5 °C below the
boiling point. Hereby volatile components are removed from the
sample, mainly carbon dioxide. Thus, the degassed cation conduc -
tivity is a measure of the impurities without a CO
2
error.
Temperature
compensation
The mobility of ions in water increase with higher temperature which
enlarges the conductivity. Therefore, the temperature is measured si -
multaneously by an integrated Pt1000 temperature sensor and the
conductivity is compensated to 25 °C. Several temperature compen -
sation curves, designed for different water compositions, can be cho -
sen.
After cation exchanger (cation conductivity), the temperature com -
pensation curve strong acids has to be set.
For more information see: Influence of Temperature on Electrical
Conductivity, PPChem (2012) .
Standard
Temperature
The displayed conductivity value is compensated to 25 °C standard
temperature.
Correction or
calibration
Not necessary.
Auto zero is done automatically each day at 0.30 at night.
Operation The sample enters at the sample inlet [O] and flows through the flow
regulating valve [I], where the flow rate can be adjusted.
With the first conductivity sensor [A] the specific conductivity (sc) of
the sample is measured. Then the sample is led through the cation
exchanger bottle [P] where all alkalization agent is eliminated. After -
wards the cation conductivity (cc) of the sample is measured with the
second conductivity sensor [B].
The sample leaves the measuring cell through the flow meter [G] and
is led through the heating element of the heat exchanger [L], where
the sample is pre-heated.The pre-heated sample flows then into the
heater [N] where it is heated up to its boiling point. Vapor leaves the
heater via the pressure relief tube [E]. The boiled sample flows via
tube [M] back to the heat exchanger where it is cooled down. Then it
flows via tube [R] into flow cell [H] where the degassed conductivity
is measured.
The temperature is measured with the temperature sensors integrat -
ed in the conductivity sensors.