O2 EII Pro
Technical Manual
Document ref: MO2-865-00
December 2015
Page 11 of 26
4
Operation
4.1
Controls
The analyser is fitted with an ‘On’ button located on the side of the unit, when held in
your left hand the button should sit comfortably under your thumb. To turn the unit on
press the button once, the unit will automatically turn off 10 minutes after the button
has been pressed, as a result if the O2 EII Pro is accidentally turned on your battery will
not be drained of power. When it is switched on the analyser's display will show an
oxygen reading do not use the O2 EII Pro before calibration (see Section 3.2).
The ‘On’ button also acts as a hold button, to freeze the reading on the display press
the ‘on’ button once. A ‘:’ symbol will appear to show the instrument is holding the
reading. To cancel the hold press the ‘On’ button once, the ‘:’ symbol will disappear and
the instrument will monitor ambient O2.
The low battery warning is a shown by ‘L’ on the display. When present, change the
battery before using the instrument (see Section 5.0, After Sales Service).
A waterproof calibration knob is located on the front. Turn it fully from left to right and
then fully left, the reading should increase and then decrease. (If the reading does not
change see Section 4.0, Quick Check).
NOTE: IF LOW BATTERY SYMBOL IS SHOWN REPLACE THE BATTERY ASAP.
Switch on
Reading Held
Reading released monitoring
ambient O2
‘L’ Low battery symbol
