Hach ORBISPHERE 410 Quick Operator's Manual page 7

General
To calibrate the gas to measure (main gas), the
user usually puts the sensor in the main gas
without interfering gas.
Calibrations can only be performed once the
instrument has been installed, configured and the
channel has been set up. You must also ensure
that you have the correct access rights to access
the calibration menu.
Select Sensor calibration from the calibration
menu. There are two types of gas sensor
calibration available, depending on the gas being
measured and the type of sensor in use:
1) In Air: The sensor is exposed to air at
atmospheric pressure.
2) Direct value: This calibration exposes
the sensor to a gas with a known partial
pressure, or a liquid sample with a
known gas concentration.
Electrochemical Gas Sensor Calibration
Calibration of the Measured Gas
Before initiating a calibration process, the
calibration parameters must be set by pressing on
the Modify button. Last calibration parameters
are memorized, so this step can be ignored if
correct parameters are already set.
Calibration
Modify Calibration Parameter
• Calibration mode: 2 types available,
depending on the gas being measured
and type of sensor being used:
• Direct value
• In Air (default)
• Medium: Select liquid or gas (direct
calibration only)
• Concentration unit type: Partial, fraction
or dissolved (dissolved is for calibration
in a liquid only)
• Concentration unit: The list of available
units depends on unit type selected
above.
• Liquid: Select as appropriate, when liquid
has been selected in medium (above).
• Enter the gas concentration according to
value in the calibration media, when
direct value is used
• Hold during calibration: On by default,
this stops any output from the instrument
during the calibration process to avoid
sending invalid information to any
connected device.
• Interference enabled: If selected, this
takes into account the influence of
interferences during calibration. By
default the same interference as during
measurement is selected.
Press OK to start calibration
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