RADIOMETER ABL800 FLEX - Page 25

1. Potentiometric measuring principles ABL800 FLEX Reference Manual
pCO
2
electrode, Continued
Stability criteria
The following stability criterion must be met to obtain a stable electrode response
during calibration:
upd.i)(sample,OCupd.last)(sample,OC
22
pp − ≤ pCO
2
(limit)
This criterion is valid for calibrations using Gas 1 and Gas 2 where:
Parameter pCO
2
value from the last updating number...
ABL805/835 FLEX ABL800/830 FLEX
pCO
2
(sample,upd.last) 92 62
pCO
2
(sample,upd.i) 86 or 87 56 or 57
(the relationship must be fulfilled for at least one of
the updating numbers)
pCO
2
(limit) value for the stability criterion is 0.40 kPa/3.0 mmHg.
The following stability criteria must be met to obtain a stable electrode response
during measurement:
δ= upd.i)(sample,OC)upd.30(sample,OC
22
pp −
For δ
Criterion
≤1.33 kPa
40.0)upd.16(sample,OCupd.30)(sample,OC
22
≤− pp
>1.33 kPa
5.0
)1upd.(sample,OC)upd.16(sample,OC
)upd.16(sample,OCupd.30)(sample,OC
1.0
22
22
<
−
−
≤−
pp
pp
For δ >1.33 kPa:
if the following criteria are fulfilled, then no result is reported:
0.1
)1upd.(sample,OC)upd.16(sample,OC
)upd.16(sample,OCupd.30)(sample,OC
22
22
−<
−
−
pp
pp
or
5.0
)1upd.(sample,OC)upd.16(sample,OC
)upd.16(sample,OCupd.30)(sample,OC
22
22
≥
−
−
pp
pp
Continued on next page
1-20