Automatic Calibration; Manual Calibration - Hach ORBISPHERE G1100 User Manual

7.1.2 Automatic calibration

If automatic calibration is the preferred option, ensure that this has been set up and that the
parameters are correct. Refer to
parameters.
When the calibration starts, the sample flow into the flow chamber is cut off automatically by the
solenoid valve. Gas from the attached nitrogen gas bottle then flows through the flow chamber
until measurements match the criteria set in Stop parameters or the time-out period of 10
minutes has elapsed.
Once the automatic calibration process is invoked, the message "Auto cal." will flash alternately
with the measurement on the numeric view screen for the duration of the calibration.
When the stability criteria is reached, the calibration process stops automatically and the
calibration parameters are updated. Normal sample measurement then resumes.
If the stability criteria is not reached within a 10 minute period, the sensor cannot be calibrated
and the process is aborted. After the delay defined in Stop parameters, a second calibration is
then attempted. If this second calibration also fails, then an Auto. Cal error event is activated.
Normal sample measurement then resumes but the calibration parameters unchanged.
Note: If a calibration is unsuccessful, no calibration report will be created. The report is only created with a
successful calibration.

7.1.3 Manual calibration

Manual calibrations can be made at any time, even if the auto-calibration parameter is enabled.
Refer to
calibration on page 60
methods.
Calibration configuration on page 58
or High-level adjustment on page 60
Calibration configuration on page 58
for setting the calibration parameters, and
Calibration Menu
for setting the calibration
for details of the different calibration
Zero
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