Operator's Manual

Rad-97 Chapter 15: Specifications
www.masimo.com 185 Masimo
Data Output Specifications
Fi and ET** Fi and ET are displayed after one breath and have a continuously updated
breath average.
The following method is used to calculate end-tidal (ET) values:
The highest concentration of CO
2
during one breathing cycle with a weight
function applied to favor values closer to the end of the cycle.
ET will typically decrease below nominal value (ET
nom
) when respiration rate
(RR) exceeds the RR threshold (RR
th
) according to the following formula for
CO
2
:
ET=ET
nom
×(125/RR) for RR
th
>125
**Measured at I/E ratio 1:1 using breath simulator according to EN ISO 80601-2-55 fig.
201.101.
Gas Analyzer Specifications
Sensor head
• 2 channel NDIR type gas analyzer measuring at 4 to 5 μm.
• Data acquisition rate 10 kHz (sample rate 20 Hz / channel).
Compensations
• Automatic compensation for pressure and temperature.
• Manual compensation for broadening effects on CO
2
.
Calibration No span calibration is required for the IR bench. An automatic
zeroing is performed 1 to 3 times per day.
Warm-up time < 10 seconds (Concentrations reported and full accuracy)
Rise time*** ≤ 200 ms
Total System Response
Time
< 3 seconds (with 2 m NomoLine Airway Adapter Set sampling line)
***Measured according to EN ISO 80601-2-55.
Interfering Gas Vapor Effect
Gas or Vapor Gas Level CO
2
N
2
O
4
60 vol% _
2