12.7 Specifications for N-20P
Components
•
N-20P pulse oximeter
•
Four alkaline "C" size batteries
•
DURASENSOR
®
DS-100A oxygen transducer
•
2
OXISENSOR
D-25L oxygen transducers
•
EC-4 sensor extension cable
•
Protective rubber boot (includes shoulder strap and hand strap)
•
N-20 operator's manual
•
Integrated printer and one case (12 rolls) of thermal paper (N-20P only)
Readout
Display showing SpO
2
(arterial hemoglobin oxygen saturation), pulse rate, and pulse amplitude; also included are
a Pulse Search and Low Battery indicator, and an electroluminescent backlight.
Controls
N-20P:
•
Measure button switches instrument on, initiates measurement cycle, and switches instrument off.
•
Battery check button is used to check battery condition and switches beeper on and off.
•
ON button switches the printer on and off.
•
D/D sets display date and time.
•
ADV advances and increments time and date.
Spot Check Operating Mode
Spot check mode is started by depressing the instrument measure button once. Spot check mode computes
SpO
2
averaged over five valid pulses and displays SpO
2
and pulse rate at the end of the measurement interval.
If the printer is activated, the printout shows the displayed SpO
2
and pulse rate.
Extended Operating Mode
Extended mode is started by holding down the instrument measure button for approximately 3 seconds, plus any
time required to complete the power-on self test. The N-20P displays updated SpO
2
and pulse rate with every
pulse (after five valid pulses have been detected). The N-20P remains active until 3 minutes after the sensor is
removed, until the instrument is turned off, or until 30 minutes have elapsed since the last detected pulse.
The N-20P printout shows SpO
2
and pulse rate at 30-second intervals. The N-20P will indicate any 2%
decrease in SpO
2
. This event is signaled by two brief, low-pitched tones and an asterisk (*) on the N-20P
printout. At the end of the measurement period, a header and statistical summary values (minimum, maximum,
and mean of both pulse rate and oxygen saturation) are printed.
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