Hach 8398 Serie Manual Del Usuario página 9

3. Select Calibration options.
4. Select an option.
Option
Calibration
reminder
Operator ID for
calibration
4.3.5 Temperature calibration
The temperature sensor has been calibrated at the factory. However, it is recommended to always
do a temperature calibration before a conductivity calibration.
1. Put the sensor in a container of water.
2. Measure the temperature of the water with an accurate thermometer or independent instrument.
3. Select the main menu icon, then select Devices. A list of all of the available devices shows.
4. Select the sensor and select Device menu > Calibration.
5. Select 1-point temperature calibration.
6. Wait for the value to stabilize, then push OK.
7. Enter the exact value and push OK.
8. Return the sensor to the process and push the home icon.
4.3.6 Zero calibration
Complete a zero calibration to set the zero point of the conductivity sensor. The zero point must be
set before the sensor is calibrated for the first time with a reference solution or process sample.
1. Remove the sensor from the process. Wipe the sensor with a clean towel or use compressed air
to make sure the sensor is clean and dry.
2. Select the main menu icon, then select Devices. A list of all of the available devices shows.
3. Select the sensor and select Device menu > Calibration.
4. Select Zero calibration.
5. Select the option for the output signal during calibration:
Option Description
Active The instrument sends the current measured output value during the calibration procedure.
Hold The sensor output value is held at the current measured value during the calibration procedure.
Transfer A preset output value is sent during calibration. Refer to the controller user manual to change the
preset value.
6. Hold the dry sensor in the air and push OK.
7. Do not push OK until the calibration result shows on the display.
8. Review the calibration result:
• "The calibration was successfully completed."—The sensor is calibrated and ready to measure
samples. The slope and/or offset values are shown.
• "The calibration failed." —The calibration slope or offset is outside of accepted limits. Repeat
the calibration with fresh reference solutions. Clean the sensor if necessary.
9. Push OK.
10. Proceed to the calibration with a reference solution or process sample.
Description
Sets a reminder for the next calibration (default: Off). A reminder to calibrate the sensor
shows on the display after the selected interval from the date of the last calibration.
For example, if the date of the last calibration was June 15 and Last calibration is set to
60 days, a calibration reminder shows on the display on August 14. If the sensor is
calibrated on July 15, a calibration reminder shows on the display on September 13.
Includes an operator ID with calibration data—Yes or No (default). The ID is entered
during the calibration.
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