ProCon
®
C Series Conductivity Sensor Operating Manual
2
Preface
Please read this manual carefully before use.
When receiving the instrument, please open the package carefully, check to ensure the instrument and accessories have not been
damaged during transportation. If any issues are found, please contact our after-sales service department or regional customer service
center. Ensure item is returned in the original packaging.
Only properly skilled authorized personnel should carry out installation, setup and operation. Ensure that the power cable is physically
separated from the power supply during the initial wiring connection or repair.
For example,
1. Apparent damage to the sensor
2.
The sensor does not work properly or provides specified measurements
3. The sensor has been stored for a long time in an environment where the temperature exceeds 70°C
The sensor must be installed by licensed professionals in accordance with relevant local specifications, and instructions are included in the
operation manual. Comply with the technical specifications and input requirements of the controller.
Preparation before measurement
Important
The conductivity sensor has been factory calibrated. Initial on-site calibration should not be necessary.
When measuring high-purity water, avoid pollution, correctly select the constant of conductivity electrode, and preferably adopt the sealed
and flowing measurement method. Otherwise, the conductivity value will increase quickly, because the carbon dioxide in the air will
become conductive carbonate ions after being dissolved in high-purity water, which will affect the measured value.
If calibration is required, please follow these steps:
4. The conductivity electrode shall be rinsed twice with deionized water [or distilled water) less than 0.5us/cm before use, and then rinsed
with the tested sample before measurement.
5. The value displayed by the instrument after measurement has been converted to the measured value at 25°C. If no compensation is
needed, unplug the temperature electrode and the instrument displays 25°C. The measured value is the conductance value of the
solution at that time.
6. The conductivity standard provides the simplest and most accurate method for calibrating conductivity sensors. Select a conductivity
standard whose concentration is close to or higher than the expected sample concentration.
7. The conductivity standard can be used to verify whether the conductivity sensor responds correctly.
Re-calibration Procedure
1. Prepare a calibrated beaker of appropriate size, which will allow you to completely immerse the conductivity sensor tip.
2. Check to determine if there are any deposits on the electrode sensing area. If the sensing surface (platinum black) is coated, clean the
sensor before continuing. Flush the sensor reaction area with distilled water.
3. Rinse the calibration beaker with some standard solutions, and then pour the selected conductivity standard solution into the calibration
beaker.
4. Immerse the electrode and ensure that the sensing area of the electrode is completely immersed in water. If there is a vent hole in the
sensing area, the electrode must be submerged under the vent hole. Shake sensor to ensure that trapped air bubbles are released from
sensing area
Important
a) Bubbles in the control area of the conductivity electrode will cause serious interference to the ion flow and will lead to erroneous
readings.
b) When measuring high-purity water, avoid exposure to CO2, correctly select the constant of conductivity electrode.
c) The recommended procedure is to adopt the sealed and flowing measurement method.
5. Enter the standard value of the standard used from the menu.
6. Start calibration. Wait for the reading to stabilize, and then adjust the reading to the temperature compensation value of the conductivi-
ty standard.
NOTE:
a) Please refer to supporting instruments for specific calibration process.
b) Repeat the process to ensure that the calibration is correct.
7.
Ensure sensor is flushed with DI water prior to storage.