RADIOMETER ABL800 FLEX, Reference Manual

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ABL800 FLEX Reference Manual 1. Potentiometric measuring principles
pCO
2
electrode,
Continued
Stability criteria
(continued) Expired air samples:
Measurement on an expired air sample is accepted if the following criterion is
fulfilled:
⏐
p
CO
2
(sample,upd.30)
−
p
CO
2
(sample,upd.24)
⏐≤
0.40 kPa (3.0 mmHg)
or
⏐
p CO
2
(sample,upd.30)
−
p CO
2
(sample,upd.24)
⏐≤
0.04
×
p CO
2
(sample,upd.30).
Error message "Measurement unstable" (= p CO
2
response fault during electrode
monitoring in Expired air mode) is displayed if the stability criterion is not
fulfilled.
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