Hach-Lange ORBISPHERE KM1100 Basic User Manual - Manual (Page 21)

Option Description
Liquid This defaults to Water for the K1100 sensor and Beer for the M1100 sensor.
Reference value Enter the reference value for calibration.
Zero calibration
With this method, the sensor should be removed from the sample and exposed to pure N
2
gas. It is
recommended to use the specially designed portable calibration device for this purpose.
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 is an informational message showing the difference between the
current and previous sensor calibrations.
The Signal within range and Stability reached boxes indicate whether the calibration is within
acceptable limits. When both boxes indicate YES, press Finish to accept the new calibration. If one
or both boxes continue to 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 enabled then the calibration will be considered successful when the parameters
defined in Stop parameters are met.
If you have not accepted or cancelled the calibration after an elapsed time of 10 minutes then the
process will time-out.
100% humid air calibration (high range sensors only)
With this method, the sensor should be removed from the sample and exposed to air saturated with
humidity. Do this by putting a drop of water in the calibration cap before installing the cap on the
sensor. Press Start to start the calibration. The process is then the same as for the Zero calibration
described previously.
High level adjustment
Note: Before using this option, ensure a zero calibration has been successfully completed first.
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).
Press Start to start the calibration. The process is then the same as for the Zero calibration
described previously.
Barometric pressure calibration
Note: The barometric pressure sensor has been factory calibrated but should be periodically verified with a
precision certified barometer. This is only necessary if measuring in gas phase with fraction units (%, ppm).
The upper box shows the barometric pressure as measured by the instrument.
Using a precision certified barometer measure barometric pressure in the location where the
measuring instrument is used. Compare the values anf if they are the same press Cancel, otherwise
enter the new barometric pressure value in the lower box and press Validation to validate the new
setting.
Services menu
There are a number of options available from this menu with the key options detailed below.
Calibration timer
The instrument can automatically remind the user when the next sensor calibration is due.
• To enable the timer, select Enable and enter a delay in days.
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