About Sensor Calibration; Cell Constant; Temperature Calibration; Zero Calibration Procedure - Hach Polymetron 9523 Manual Básico Del Usuario

3. To view the current status of the resin select the STATUS option and push enter. The date the
resin was last changed and the current life expectancy are displayed. Push back to return to the
menu or enter to reset the parameters.
4. To reset the resin parameters select PARAMETERS and push enter. Based on the values input,
the life expectancy of the resin is recalculated.
Option
CAPACITY
VOLUME
FLOW
CONCENTRATION Use the arrow keys to enter the resin concentration (0 to 20 ppm).
7.3 Calibration

7.3.1 About sensor calibration

The sensor characteristics slowly shift over time and cause the sensor to lose accuracy. The sensor
must be calibrated regularly to maintain accuracy. The calibration frequency varies with the
application and is best determined by experience.
Use air (zero calibration) and the process sample to define the calibration curve. When the process
sample is used, the reference value must be determined with a secondary verification instrument.

7.3.2 Cell constant

Before making a calibration make sure the sensor cell parameters are correct.
1. Push the menu key and select SENSOR SETUP>[Select Sensor]>CALIBRATE.
2. If the pass code is enabled in the security menu for the controller, enter the pass code.
3. Select CELL CONSTANT and push enter.
4. Contacting conductivity sensors: Select the cell K range for the sensor (0.01, 0.1 or 1.0) then
enter the actual K value as printed on the label attached to the sensor.
Inductive conductivity sensors: Enter the actual K value as printed on the label attached to the
sensor.

7.3.3 Temperature calibration

It is recommended to calibrate the temperature sensor once a year. Calibrate the temperature sensor
before calibrating the measurement sensor.
1. Measure the temperature of the water with an accurate thermometer or independent instrument.
2. Push the menu key and select SENSOR SETUP>CALIBRATE.
3. If the pass code is enabled in the security menu for the controller, enter the pass code.
4. Select 1 PT TEMP CAL and push enter.
5. The raw temperature value is displayed. Push enter.
6. Enter the correct value if different from that displayed and push enter.
7. Push enter to confirm the calibration. The temperature offset is displayed.

7.3.4 Zero calibration procedure

Use the zero calibration procedure to define the unique zero point of the sensor.
1. Remove the sensor from the process. Wipe with a clean towel to make sure the sensor is dry.
2. Push the menu key and select SENSOR SETUP>[Select Sensor]>CALIBRATE.
3. If the pass code is enabled in the security menu for the controller, enter the pass code.
4. Select ZERO CAL and push enter.
20 English
Description
Use the arrow keys to enter the resin exchange capacity (0.5 to 5.0 mole/liter).
Use the arrow keys to enter the volume of resin (0.5 to 20 liters).
Use the arrow keys to enter the sample flow rate through the cartridge (2 to
20 liters/hour).