Zero Calibration; High-Level Adjustment - Hach ORBISPHERE G1100 User Manual

Calibration Menu

7.2.3 Zero calibration

7.2.4 High-level adjustment

60
With this method, the sensor should be exposed to pure N
gas using the specially designed flow chamber. Provided the
sensor is attached to the flow chamber, this calibration
method can also be automated. Refer to
calibration on page 59.
Press Start to start the calibration.
A screen is displayed showing the measured values and
length of time the sensor has been under calibration. These
values are continually refreshed.
The value % last calibration displayed in the top box is an
informational message showing the difference between the
current and previous sensor calibrations.
The Signal within range and Stability reached boxes in the
top right corner indicate whether the calibration is within
acceptable limits. When both boxes indicate YES, press
Finish to accept the new calibration. A confirmation screen
then asks to accept and store the new parameters.
If one or both boxes show NO, you can still perform a
calibration but it is not recommended, and the calibration
should be aborted by pressing the Cancel button.
In the case of a calibration failure, attempt a second
calibration after about 5 minutes. If the second attempt also
fails, then refer to your Hach Lange representative for advice.
Note: If the Auto-End parameter is set (refer to
configuration on page 58), then the calibration will be deemed
successful when the parameters defined in Stop parameters are
met. You will then be asked to confirm the calibration.
If you have not accepted or cancelled the calibration after an
elapsed time of 10 minutes then the process will time-out, and
the warning message illustrated left will be displayed.
This calibration exposes the sensor to a gas or a liquid
sample with a known gas concentration. You also have the
option to reset the sensor's calibration parameters to factory
settings (from drop-down list for Cal. sample).
The screen example illustrated is for calibrating using a liquid
sample. The screen for calibration using a gas bottle differs
only slightly.
Press Start to start the calibration. The process is then the
same as for the zero calibration described previously.
2
Configure automatic
Calibration