3B Scientific Human Pulse Sensor Box User Manual

3B SCIENTIFIC

Human Pulse Sensor Box U11392

Instruction sheet

03/08 Hh

®

PHYSICS

1. Safety instructions

The human pulse sensor box is only intended for
teaching purposes. The experimental data and
recorder traces that are obtained must never be
used for evaluating a person’s state of health.

• Do not use the pulse sensor box as a diagnostic

instrument.

• Do not use the pulse sensor box as an

instrument for monitoring the effects of
therapeutic treatments.

• The pulse sensor box and the 3B NETlog

only be used with a PC that conforms to the CE
specifications, and in particular to the
European standard EN 69950.

• Do not open up or interfere with the pulse

sensor box under any circumstances.

The human pulse sensor box is constructed in
accordance with the current safety regulations of
protection class II, classification BF (body, floating
earth).

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must

2. Description

Sensor box with attachable optical-electronic pulse
detector (ear-clip consisting of an infra-red
photoelectric sensor).

Provides automatic adjustment according to the
signal strength (sensitivity adjustment) when
measuring at the ear-lobes, at the base of the nail
of the little finger, or on the surface of the skin
between the thumb and forefinger.

The sensor box is detected automatically by the 3B

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NETlog

1 Sensor box
1 Infra-red pulse detector, cable length 1.20 m
1 MiniDIN 8-pin connector cable, 600 mm long
1 Instruction sheet for U11392

unit.

3. Equipment supplied

1

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

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

5. Instructions

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software

7. Sample experiment

• 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

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unit.

6. Applications

Measurements of pulse rate when resting or during
physical activity.

Observing changes in pulse rate during a heated
discussion.

Measuring the pulse rate of a human guinea pig

Equipment needed:
1 3B NETlog
1 3B NETlab

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U11300

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

• Start the program and select the pulse rate

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unit.

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

2