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GT SERIES
1 INSTRUMENT, 7 APPLICATIONS
4.4.3.3. Air-Free CO
Air-free CO is the CO reading modified by the O
when an O
sensor is fitted. This measurement assists in determining if the emissions from an
2
unventilated appliance (e.g. oven or a stove/cooker) are safe.
CO Air-free = (20.9 x CO) / (20.9 - O
An Air-Free CO reading is not available if the O
Air-Free CO (invalid
sample).
The Air-Free CO reading is available once the O
37: Air-Free CO (valid
sample).
4.4.3.4. CO Viewing
This allows the user to view the six most recent manually logged readings, as shown in
CO Viewing
Display.
If enabled, a CO Viewing screen will also be displayed when entering any of the other three sub-
modes (press and hold OK
Note: A Differential CO ('DIF') reading will only be valid if there is a preceding
Differential CO Zero ('DIFZ') on the list. Otherwise 'zzz' fault indication will be
displayed instead of the gas value.
24
)
2
2
Figure 36: Air-Free CO (invalid sample)
2
Figure 37: Air-Free CO (valid sample)
Figure 38: CO Viewing Display
button to proceed).
reading. This measurement is only available
2
reading is above 19%, as shown in
reading is less than 19%, as illustrated in
Figure 36:
Figure
Figure 38:
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Revision 10
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