Comen C80 - Aderse Effects on Performance

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In the AG interface, rotate the shuttle button to move the cursor on the display interface to
“Measurement Setup" in the menu bar or enter “Measurement Setup" in the main menu to select
“AG Setup” and “AG AA”, and then press the shuttle button to enter the menu “AG AA”. Refer to
the section “AG AA Settings in Parameter Area” for the specific options of the menu “AG AA” in
“Measurement Setup”.
18.7 Aderse effects on performance
(1) The following circumstances can cause known adverse effects on indicated performance:
z Quantitative effects of humidity or condensation.
z Quantitative effects of atmospheric pressure.
z Disturbing gases or water vapor.
z Other disturbing sources.
(2) Gas measurement unit
Volume percentage is used as the unit of concentration of a reported gas. Concentration is
defined below:
The total pressure of a mixed gas is measured by the cup pressure sensor in the ISA gas
analyzer.
If you want to convert it into another unit, you can the actual atmospheric pressure sent by
the ISA sidestream analyzer; for example:
CO
2
(mmHg) = (CO
2
) x (atmospheric pressure (kPa) from the ISA) x (750 / 100)。
For example: 5.0 vol% CO
2
@ 101.3 kPa 0.05 x 101.3 x 750 / 100 = 38 mmHg
(3) Effects of Moisture
The partial pressure and volume percentage of CO
2
, N
2
O, oxygen or an anesthetic gas depend
on the content of water vapor in the measured gas. Oxygen measurement will be calibrated;
at the actual ambient temperature and humidity level, 20.8 vol%, in stead of the actual partial