Agilent Technologies 6834B Guía de usuario Pagina 69

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M3000A/M3046A/M3015A/M3016A Service Guide
Introduction to the Instrument 1-53
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:DYH
The two calibration marks are located at 10% and 60% of wave channel height. The lower
calibration mark is labeled 0 mmHg (0.0 kPa) on all scales. The upper one is adjustable from
20 mmHg (2kPa) to 100 mmHg (13 kPa) in steps of 10 mmHg (1kPa).
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In the measurement mode, the Extension continuously measures CO
2
concentration and
calculates medical parameters.
1
2&RUUHFWLRQThis can be turned on or off. If N
2
O correction is off, only oxygen cor-
rection to CO
2
is made. In this case, it is assumed that the gas mixture consists mainly of O
2
and N
2
(respiratory intensive care unit conditions).
If N
2
O correction is on, oxygen and N
2
O correction to the CO
2
value is made. In this case,
it is assumed that the gas mixture consists mainly of O
2
and N
2
O (operating room condi-
tions).
2
&RUUHFWLRQ There is a fixed correction of 45% O
2
.
+XPLGLW\&RUUHFWLRQThis correction is selectable between Body Temperature Pressure
Saturated (BTPS) and Standard Pressure Temperature Dry (STPD). The Extension meas-
ures BTPS and uses this correction formula:
where P
H20
= 47mmHg
0D[+ROGThere are three possible selections:
2IIThe EtCO
2
numerics display the breath-to-breath value.
VHFRQGVThe EtCO
2
numerics display the highest value within a moving window
over a 10-second period.
VHFRQGVThe EtCO
2
numerics display the highest value within a moving window
over a 20-second period.
6DIHW\
To ensure the safety of the patient, the patient-applied part is isolated from ground by opto-
couplers and a transformer. The circuit is also encapsulated in plastic.
Calibration Marks
Wave Range
&2
P
STPD
= P
BTPS .
P
abs
P
abs
P
H2O
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