7-2
CO (CARBON MONOXIDE MODE)USER HANDBOOK
To highlight the required option:
• Use the UP and DOWN buttons.
To select the highlighted option:
• Press and hold OK .
Note 1: The highlighted option will be that previously used.
Note 2: If an O2 sensor is not tted then the Airfree Option is
automatically unavailable.
Note 3: Your company may have decided to have its instruments
congured only for certain of the above options. If only one option is
selected, then after selecting CO mode from the main menu, either
7.4.1, 7.4.2 or 7.4.3 will be entered directly.
7.4 CO DISPLAYS
During the warm-up period,
all applicable sensors will be
checked and the display will
indicate any sensor faults.
A positive zero fault is indicated
by a ashing gas reading, as
illustrated in Fig. 7.2.
A negative zero fault
is indicated by a spanner
alternating with a zero reading
(not illustrated).
Fig. 7.2 Sensor Fault
alternating with
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