Hach 8350.3 Benutzerhandbuch Seite 14

The output signal returns to the active state and the measured sample value is shown on the
measurement screen.
4.3.7 Exit calibration procedure
1. To exit a calibration, push the back icon.
2. Select an option, then push OK.
Option
Quit calibration
Return to calibration Return to the calibration.
Leave calibration
4.3.8 Reset the calibration
The calibration can be reset to the factory default settings. All sensor information is lost.
1. Select the main menu icon, then select Devices. A list of all of the available devices shows.
2. Select the sensor and select Device menu > Calibration.
3. Select Reset calibration to defaults, then push OK.
4. Push OK again.
4.4 Impedance measurements (glass electrode pH sensors only)
To increase the reliability of the pH measurement system, the controller determines the impedance of
the glass electrodes. This measurement is taken every minute. During diagnostics, the pH
measurement reading will be on hold for five seconds. If an error message appears, refer to
on page 17 for more details.
To enable or disable the sensor impedance measurement:
1. Select the main menu icon, then select Devices. A list of all of the available devices shows.
2. Select the device and select Device menu > Diagnostics/Test.
3. Select Impedance status.
4. Select Enabled or Disabled and push OK.
To see the active and reference electrode impedance readings, select Sensor signals.
Section 5 Maintenance
Multiple hazards. Only qualified personnel must conduct the tasks described in this section of the
document.
Fluid pressure hazard. Removal of a sensor from a pressurized vessel can be dangerous. Reduce
the process pressure to below 7.25 psi (50 kPa) before removal. If this is not possible, use extreme
caution. Refer to the documentation supplied with the mounting hardware for more information.
14 English
Description
Stop the calibration. A new calibration must start from the beginning.
Exit the calibration temporarily. Access to other menus is allowed. A calibration for a
second sensor (if present) can be started.
W A R N I N G
W A R N I N G
Error list