3B Scientific Human Pulse Sensor Box - Manual (Page 2)

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4. Technical data
Measurement range: 40–160 pulse beats/min
Sensor type: Infra-red photoelectric
sensor in transparent
optical capsule
Safety category: Protection class II,
classification BF
5. Instructions
• Place the sensor box near the person to be
tested.
• Place the pulse detector on a part of the body
with a strong flow of blood, e.g., an ear-lobe or
the base of the nail of a little finger.
• During the measurement the person being
tested should sit still or stand.
• Read off the sensor output voltage on the
display of the 3B NETlog
TM unit.
6. Applications
Measurements of pulse rate when resting or during
physical activity.
Observing changes in pulse rate during a heated
discussion.
Measuring the time for the pulse rate to return to
the resting rate after physical activity.
Investigation of the pulse time difference at
different positions in the body in relation to a
reference measurement point, such as the base of
the nail of a little finger. For this experiment use a
second pulse sensor box and analyse the data using
the 3B NETlab
TM software
7. Sample experiment
Measuring the pulse rate of a human guinea pig
Equipment needed:
1 3B NETlog TM U11300
1 3B NETlab TM U11310
1 Human pulse sensor box U11392
• Set up the experiment as shown in Fig. 1.
• Open the application program (template) for
the experiment with the pulse sensor box on
the 3B NETlab
TM unit.
• Start the program and select the pulse rate
function.
• On the trace obtained, use the two cursors to
measure the time interval that covers about 20
pulse beats (fig. 2).
• Calculate the number of pulse beats per
minute.
• Change the experimental conditions for the
guinea pig and repeat the experiment.
Fig. 1 Measurement of a person’s pulse rate