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ENGLISH
M
aximal optical output power: less than 2mW maximum average
2. SpO
2
measuring range: 0%~100%
3. SpO
2
measuring accuracy: Arms
*
is not greater than 2% for SpO
2
range from 70% to 100%
*
NOTE: Arms is the accuracy defined as root-mean-square value of deviation according to ISO 80601-2-61.
4. Alarm range: High: 1%~100%; Low: 0%~99%
5. Low perfusion performance: the declared accuracy is sustained when the pulse amplitude modulation ratio is as
low as 0.3%
Data averaging and update:
T
he displayed SpO
2
and Pulse Rate values are the average of data collected within a specific time. The SpO
2
is calculated
every second by the data collected in recent 5 seconds, the Pulse Rate is calculated for every beat. The averaging method
depends on the pulse rate value, for pulse rates below 50bpm, the SpO
2
is averaged by 16-second sliding average, the
Pulse Rate is averaged by 4-beat sliding average; for pulse rates between 50bpm and 120bpm, the SpO
2
is averaged by
8-second sliding average, the Pulse Rate is averaged by 8-beat sliding average; for pulse rates above 120bpm, the SpO
2
is
averaged by 4-second sliding average, the Pulse Rate is averaged by 16-beat sliding average.
The screen display of SpO
2
and Pulse Rate are updated every second with the most recent value, if the signal is noisy or
missing, the display will hold the last value for at most 15 seconds before showing dashes.
The over-limit alarm is triggered once the SpO
2
or Pulse Rate exceeds the preset limits, the alarm signal generation delay
is small (less than 1 second) compared with the alarm condition delay, which is caused by the data average as described
above.
17.6 Pulse Rate
1. Pulse rate measuring range: 0bpm~250bpm
2. Pulse rate measurement accuracy: ±2bpm or ±2%, whichever is greater.
3. Alarm range: High:
（
1
～
300
）
bpm; Low:
（
0
～
299
）
bpm
4. Pulse rate alarm tolerance: ±2bpm within (30
～
250) bpm
Note: The pulse rate ACCURACY is tested by an electronic pulse simulator.
17.7 S-T Segment
1. Measuring range: -2.0mV
～
+2.0mV
2. Tolerance: -0.8mV
～
+0.8mV ±0.02mV or ±10% (which is greater)
17.8 Data Recording
1. Sensitivity selection tolerance: ±5%
2. Recording speed: 25mm/s
3. Recording speed accuracy: ±10%
4. Hysteresis: ≤0.5mm
5. Frequency response:
Monitoring mode: 0.5~40Hz Diagnostic mode: 0.05~75Hz
6. Time constant:
Monitoring mode: ≥0.3s Diagnostic mode: ≥3.2s
