GE b30, Technical Reference Manual

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Specifications
8-3
Document no. 2044677-001
2.2.2 Technical specifications
Airway humidity 0...100%, condensing
Sampling rate 150 ±25ml/min (sampling line 2 to 3 m, normal conditions)
Sampling delay 2.1 seconds typical with a 3-m sampling line
Total system response time 2.4 seconds typical with a 3-m sampling line, including sampling
delay and rise time (typically 3.7 seconds with a 6-m sampling
line).
Automatic compensation for barometric pressure, CO
2
-NO
2
and CO
2
-O
2
collision broadening effect
compensation selectable from menu.
Warm-up time
1 min for operation with CO
2,
30 min for full specification
Zeroing interval 4, 15, 30 and 60 minutes after start-up, then every 60 minutes.
2.2.3 Normal conditions
Accuracy specifications apply in normal conditions (after 30 minutes warm-up period):
Ambient temperature 18...28
°
C, within
±
5
°
C of calibration
Ambient pressure 500...800mmHg, ±50mmHg of cal.
Ambient humidity 20...80% RH, ±20% RH of cal.
Automatic compensation for barometric pressure.
Non-disturbing gases are those with a maximum effect on the CO
2
reading <0.2 vol%. The
effect is valid for specific concentrations shown in parentheses of the non-disturbing gas:
−
Ethanol C
2
H
5
OH (<0.3%)
−
Acetone (<0.1%)
−
Methane CH
4
(0.2%)
−
Nitrogen N
2
−
Water vapor
−
Dichlorofluromethane (<1%)
−
Tetrafluoroethane (<1%)
Disturbing gases and their effect on the CO
2
reading at 5.0 vol% CO
2
are shown below. Errors
listed reflect the effect of specific concentrations (shown in parentheses) of an individual
disturbing gas and should be combined when estimating the effect of gas mixtures:
−
Halotane (4%) increases < 0.3 vol%
−
Isoflurane (5%) increases < 0.4 vol%
−
Enflurane (5%) increases < 0.4 vol%
−
Desflurane (24%) increases < 1.2 vol%
−
Sevoflurane (6%) increases < 0.4 vol%
−
Helium (50%) decreases < 0.3 vol%
−
If O
2
compensation is not activated: O
2
(40 … 95%) decreases < 0.3 vol%
−
If O
2
compensation is activated: O
2
(40 … 95%) error < 0.15 vol%
−
If N
2
O compensation is not activated: N
2
O (40%) increases < 0.4 vol%
−
N
2
O (40 to 80%) increases < 0.8 vol%
−
If N
2
O compensation is activated: N
2
O (40 to 80%) error < 0.3 vol%