Graph 2 - Typical zero gas purge times
Cross-Gas Effects
Carbon dioxide is measured by infrared absorption at a wavelength specific to carbon dioxide.
Therefore, the carbon dioxide reading will not be affected by any other gases. The oxygen sensor is a
galvanic cell type and suffers virtually no influence from CO
2
, CO, H
2
S, NO
2
, SO
2
or H
2
, unlike many
other types of oxygen cell.
Error Due to CO
2
Solubility in Water
Due to the water trap and filter it is possible that some of the CO
2
in the sample gas will be absorbed
in to any trapped water.
Hardware Reset
If for any reason the instrument ‘locks up’ and will not switch off, or the instrument appears off and
will not turn on, it is possible to force an emergency power off. Pressing and holding the ‘On/Off’ key
for 10 seconds will power off the instrument. Once this time has elapsed, the instrument can be
powered on as normal.
Note: Performing a hardware reset may cause loss or corruption of currently stored data
including the time/date.
To Next Page
Loading...
