Data Harvest 2327 Quick Start Manual - Page 5

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Data Harvest 2327 Quick Start Manual
It is important that investigations do not become a competition. Consider any possible health
problems before selecting the subject.
Heart Waveform (mV)
The heartbeat recorded by the Heart rate sensor is a measure of volume of blood in the finger or
earlobe against time. The waveform is the shape of the wave as it travels.
For a healthy adult at rest, the heart beats on average at about 60 beats per minute or one a
second i.e. around 1 Hz. This frequency is not constant (even in a healthy individual at rest).
It takes approximately one second to record a complete wave, so it is usually best to select a
short total recording time. A shorter interval will normally show more detail.
For example:
User Level
Recording mode
Total time
Interval
No. of samples
Approx. no. of heart
waves
Note: With Vu the fastest speed that can be used to capture data is 50 Hz (20 ms).
Primary investigations
1. Heart rate changes due to activity
2. Recovery rate - after exercise pulse is timed until it gets back to the normal standing
heart rate. Individuals with low recovery times exhibit better aerobic fitness.
Record your heart rate while at rest.
Either (a) remain seated and tap your feet in place to simulate a run or (b) remove the
sensor clip, exercise vigorously then reconnect the clip. Record the heart rate change
due to this activity.
To find your recovery rate continue recording data until your heart rate returns to its
resting heart rate level.
3. Investigating pulse rate with different body positions (sitting, crouching, standing, lying down).
4. Effect of food (chocolate) or mild stimulants (caffeine)
5. Effect of music on pulse rate
1, 2 or 3
1, 2 or 3
2 or 3
EasyLog
EasyLog
Graph
5 s
10 s
2 s
30 ms
30 ms
20 ms
166
333
100
7 - 9
15 -17
2 - 3
2 or 3
2 or 3
3
Graph
Graph
Scope
5 s
10 s
5.1 s
20 ms
20 ms
20 ms
250
500
256
5 - 6
10 - 12
10
3
Scope
12.75 s
50 ms
256
20