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Manual LactoFAN
2
Calibration
FAN delivers the LactoFAN
2
already calibrated.
To achieve measurements of the greatest accuracy we recommend the unit be calibrated
after always one month.
FAN can supply calibration gas (100 ppm H
2
in Nitrogen) complete with a control valve for
simple and economic user calibration (see page 22).
The gas is supplied in convenient, disposable, aluminum aerosol cans containing 10 liters
of gas.
With this approximately 14 calibrations of the instrument can be readily achieved.
Please proceed as following:
Press the settings button (see page 7), to display the settings screen.
Press the button “start calibration”
.
The screen will guide you through all steps necessary.
Screw the control valve firmly onto the cylinder and assemble the gas supply as shown
on the next page.
When requested, turn the control knob anti-clockwise until the ball in the flow indicator is
between the two marks. This will then supply a gas flow of approximately 0.3 l/min.
Now slowly turn the Apply this flow for 50 seconds and then turn off the supply. Do not
remove the reducing connector.
Wait until the reading has stabilized and then confirm the reading with the OK button.
The device adjusts the amplification in relation to the reference gas value set.
If you use calibration gas with a concentration different to the default (100 ppm H
2
), you
have to change this reference value according to the concentration indicated on the gas
cylinder label.
In order to stop any gas leak from the can after calibration, ensure that the control knob
is tightened firmly.
Only certified calibration gas from a reputable source should be used.
Ensure that no H
2
is present on the sensor before starting the calibration
procedure.
Ensure that the instrument and gas cylinder have stabilized at room
temperature before calibrating.
Do not immerse the unit in the calibration gas.
