Service manual

36 Siemens-Elema AB E382 E380E 061 01 03 01
Description of functions Servo Ventilator 300/300A
2
4.1.2 O
2
concentration
PMA: O
2
concentration = Signal generated within the block 4.1 using O
2
CONC. signal from
the block 11.3 O
2
CELL which is digitally compensated for mean airway pressure and
barometric pressure according to BAROMETER PRESSURE signal from 4.6 BAROMETER
PRESSURE
TRANSDUCER.
Reference value Set O
2
= Preset O
2
concentration (on Front panel).
Alarm table:
If above mentioned O
2
concentration alarm condition is true during less than 55 s the alarm
is not registered in the alarm memory.
If the O
2
concentration setting is changed more than 2 percentage units, the alarm is
automatically muted for maximum 55 s. This also applies at activation of ”Oxygen breath”.
For O
2
concentration alarm also see 4.5 Backup alarm system.
txet”segassemdnasmralA” noitidnocerPnoitidnocmralA
hgihootcnoc2OOteS<%12
2
%001<OteS>AMP
2
%6+
wolootcnoc2OOteS<%12
2
%42<
OteS<%42
2
%69<
OteS<%69
2
%81<AMP
OteS<AMP
2
%6–
%09<AMP
txet”segassemdnasmralA” noitcnuflanoitiddA
ROSNES2OOehtfI
2
mralaytiroirphgiH;detcennocsidsillec
.langisnoituacaotdegnahcebnactaht
4.1.3 Optional alarm field
On earlier versions of the ventilator, the alarm field name was ”CO
2
concentration”.
This optional alarm field is not used.