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Carbon Dioxide (CO
) (67 28521)
2
REQUIREMENT - MAXIMUM READING OF 500 PPM. (300 PPM EU Pharmacopoeia N
O)
2
The media in the detector tube will discolour to show the presence of carbon dioxide. The total
length of the discoloration read from the printed scale at that point is a measure of the concentration
in parts per million.
For the CO
tube (67 28521), there is an option to adjust the test volume up by a factor of two to
2
increase the number of scale points. This option can be set within the setup menu as shown below.
When entering the test results into the tester, the tube reading shall automatically be divided by two,
to reflect the actual rending as shown below.
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