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V2.0
2.4 Calibration
After turning on the instrument, use the
UP
or
DOWN
buttons to go to the Calibrate Screen
and press
ENTER
(Figure 5). Users may calibrate the instrument at their volition after a
period of use or if a drift in sensor accuracy is suspected.
Figure 5:
Calibration Screen
The recommended calibration method is the standard Zero-Span technique. The X values
in the first column represent the concentration of the calibration gas in ppm. The Y values
in the second column represent the response of the sensor to be calibrated. The values in
the third column are the calibration coefficients. An example calibration procedure is
described below:
A zero air and a known concentration of formaldehyde gas standard sources are needed for
the typical zero and span calibration.
1)
Enter into the calibration screen by pressing the
ENTER
button.
2)
Connect the inlet of the instrument to a glass container and then introduce the zero air
to the glass container.
3)
Make sure that the left arrow is pointing at the first row of 0 ppm concentration (refer to
Figure 6:
Calibrate Screen with Zero Measurement Complete
