Maxim Integrated MAXREFDES103 - Data Format of the Log File

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Data Format of the Log File
Table 3. Data Table Column Definitions for the Log File (PPG_*.csv)
Log File Headings
Description
Time
Timestamp in minutes, seconds, and tenths of seconds (MM:SS.T)
Sample Count
Data index ranging from 0 to 255 for monitoring if samples are dropped
during Bluetooth transmission
Green Count
Green counts detected by photodiode 1
Green2 Count
Green counts detected by photodiode 2
IR Count
IR counts
Red Count
Red counts
X Axis Acceleration (g)
Acceleration in x-axis, in unit of g
Y Axis Acceleration (g)
Acceleration in y-axis, in unit of g
Z Axis Acceleration (g)
Acceleration in z-axis, in unit of g
Operating Mode
0: Continuous HRM and continuous SpO
2
1: Continuous HRM and one-shot SpO
2
2: Continuous HRM
3: One-shot HRM
4: One-shot HRM and one-shot SpO
2
5: Activity tracking
6: SpO
2
calibration
Heart Rate (bpm)
Heart rate, in unit of beats per min
HR Confidence (%)
Heart-rate algorithm extraction confidence; a threshold confidence >85% is
recommended
RR
R-to-R peak interbeat interval time (ms) of the QRS heart beat wave
RR Confidence (%)
R-to-R confidence level, 0 to 100%
Activity
0: Rest
1: Other
2: Walk
3: Run
4: Bike
5: Rhythmic
R Value
SpO
2
R value (R is defined in Maxim Application Note 6845)
SPO2 Confidence (%)
SpO
2
confidence level; 0 to 100%
SPO2 (%)
SpO
2
value; 0 to 100%
SPO2 Percent Complete
SpO
2
percent complete (only applicable for one-shot mode); 0 to 100%
Low Signal Quality
0: Good SpO
2
signal quality
1: Low SpO
2
signal quality
Motion Flag
0: Little or no motion
1: Excessive motion
WSPO2 Low Pi
0: Normal Perfusion Index
1: Low Perfusion Index
Unreliable R
0: Measurement of SpO
2
R is reliable
1: Measurement of SpO
2
R is not reliable
SPO2 State
0: LED adjustment
1: Computation
2: Success
3: Timeout
SCD State
Skin contact state:
0: No decision
1: Off skin
2: Contact with object
3: On skin
SAMPLE Time
Timestamp in seconds