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OdaLog
®
Gas Logger User Manual
P/N: 10-1000
Revision: F, Issued: October 2019
Page: 25
9.5 NULL (Fresh Air Zero)
Ensuring the OdaLog
®
is in Clean Air, press & hold down button until display progresses until “NULL”
appears on screen, then release button. Left LED will flash to indicate the instrument is in Null mode.
Place magnetic base of Allen Tool [Part No 11-0000] provided on the left-hand side of the LCD display
above the wording “NULL”.
“DONE” will appear briefly and the LCD will return to the “INST” screen
Note:
Magnet must be applied within 30 seconds otherwise the display will revert to “INST”. To abort, press
button down at any time and “CANCEL” will display before reverting to “INST” screen)
NOTE
It is recommended that logging sessions are stopped prior to a calibration