Cable used for cell temperature measuring is defective.
Check to see whether there is an interruption, short circuit, or shunt in the cable
Type of temperature sensor that is incorrect
On the instrument, choose the type of temperature sensor.
An inaccurate conductivity measured value was obtained during the process.
There is no or insufficient temperature compensation
Automatic temperature compensation (ATC) chooses the type of compensation; linear or sets the correct temperature coefficient. Process temperature was set by Manual temperature compensation(MTC)
Incorrectly measuring the temperature
Utilize a thermometer or reference instrument to verify the temperature value of the sample.
Bubbles in medium
Use a gas bubble trap, counter pressure (cover) to prevent the development of bubbles.
Effects of polarization (on conductive sensors only)
1.Use the appropriate sensor and a larger cell constant.2. Refer the measuring range table in the technical data of the conductivity sensor.3. Replace stainless steel with graphite sensor (and test the resistance).
High flow rate could result in bubbles.
Flow should be reduced, or mount in a low-turbulence area.
Interference current in the medium (only when conductive)
The ground medium in close proximity to the sensor. The most common reason for currents in the medium caused by faulty submerged motors.
Contaminated or coated sensors
Sensor should be cleaned (refer the Cleaning of Conductivity Sensors in preventive maintenance of conductivity transmitter article ). Use spray cleaning for media that are really dirty.
Incorrect field line resistance
Enter the appropriate value.
Inadequate sample flow rate
Keep the sample flow in the right range as instructed by the instrument’s datasheet.
Sample tubes have a leak
Verify each tube connection. On the fitting side, there shouldn’t be any leaks. Additionally, no tube should be ruptured. If a leak has been identified, fix it.
The inside of sampling tubes can be chocked.
Use the pressure pump to de-choke the tube or flush the system. Use pressurized fluid that is no more than 1.5 times as pressurized as the process fluid.
Adjustment of the air calibration out
Verify the conductivity probe’s performance during the air calibration. The conductivity analyzer ought to display a reading of 0 for the atmosphere.
There is a problem with the transmitter calibration.