FALCO Instrument User Manual V1.2R
Unrivalled Gas Detection. Page 32 of 46 ionscience.com
cannot be confirmed zero air should be used. If using a cylinder attach the tubing between the Falco
and the gas regulator.
2) Enter zero cal mode by moving the cursor to the zero cal icon and then press the Enter key.
The zero cal screen is described below:
The top value is the live ppm reading from the Falco (based on previous
calibration)
The bottom number indicates this is the zero cal screen
1) The live reading will move towards zero as the sensor housing is purged. After 2 minutes press the
Enter key to set the zero level.
The Status Light will then blink briefly to confirm the setting has been made. The top reading will then
change to 0.0ppm.
2) Remove the Zero air
3) Press the button to exit zero mode.
NOTE: The cursor cannot be moved from next to the “set” symbol . The only function the user can carry
out is to press the Enter key to set the zero level to the current ppm reading.
Span 1
Span 1 is used to calibrate Span 1 of the Falco.
1) Attach the span gas cylinder to the Falco.
2) Enter Span 1 mode by moving the cursor to the Span 1 icon and then press the Enter key. The
Span 1 screen is described below:
The top value is the live ppm reading from the Falco (based on previous
calibration)
The lower value is the span 1 concentration (100.7ppm in this example).
3) If the Span 1 concentration is not the same as the calibration gas concentration it must be changed.
To change the Span 1 concentration, move the cursor to the lower value and press the Enter
key. A new screen with that value is then displayed.
Change this value to match the level specified on the calibration gas bottle as follows. A cursor is
displayed under the first digit of the value. Press the Up or Down key to change it.
Press the Right key to move to the next digit. Repeat the above procedure to change it as required.
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