Cross-Gas Effects; Co Cell; Cell; N 2 O Cell - Geotech G200 Operating Manual

G 2 0 0 R A N G E
Operating Manual
0.1
0.09
0.08
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display reads 0.0%
0.06
Gas
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%
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0

Cross-Gas Effects

CO

Cell

2
Carbon dioxide is measured by infrared absorption at a wavelength specific to carbon dioxide. There
is a small cross interference of 1,000:1 from N
Therefore, the carbon dioxide reading will not be affected by any other gases.
O Cell
2
The oxygen sensor is a galvanic cell type and suffers virtually no influence from CO2, CO, H2S, NO2,
SO2 or H2, unlike many other types of oxygen cell.
N O Cell
2
Nitrous oxide is measured by infrared absorption at a wavelength specific to nitrous oxide and suffers
virtually no influence from CO, H2S, NO2, SO2 or H2.
Note: To compensate for the influence of N
calibrations do not contain
that the Soda Lime CO

CO Cell

Carbon monoxide is measured by an electrochemical gas sensor. It is not affected by the other
measurement gases but can have cross interference from gases not normally present in medical
supply gases and suffers virtually no influence from CO2, H2S, NO2, SO2.

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
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Typical Zero Gas Purge Time
Graph 2 - Typical zero gas purge times
2
O on the
2
CO . CO will have an influence on the N
2 2
filter is used.
2
w ait to Start Zero calibration
Time (mm:ss)
O which is compensated for within the G210.
CO it is important the Zero and N
2
2
© QED Environmental Systems Ltd.
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O Span
2
O channel. It is recommended
OMG200N Iss.04