3B Scientific Force Sensor, ±50 N - Manual (Page 2)

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4. Technical data
Measurement ranges: 0 ... ± 5 N,
0 ... ± 50 N
Sensor type: load cell with foil strain-
gauge
Non-linearity: typically ± 0.04% of total
measurement range
Resolution: 0.01 N in 5 N range
0.1 N in 50 N range
Tare compensation: max. ± 50 N
Max. frequency: typically 20 Hz
Max. diameter of
supporting rod:
13 mm
5. Operation
• Place the sensor box near the experiment and
connect it to the point that will apply the
forces; if necessary use the bent clamping rod.
• Screw in the threaded hook if appropriate, or
alternatively replace it by another attachment
for applying force.
• Connect the sensor box to one of the two
analogue inputs (A or B) of the 3B NETlog
TM
using the mini-DIN cable provided.
• Wait for the sensor recognition message
(“Probe Detect”).
• Choose the appropriate measurement range.
• If necessary, press the tare button to apply
compensation.
The tare compensation depends on the position in
which the force sensor is used, and it must be reset
for each new experimental set-up!
• Carry out the force measurement and read the
force value in the display of the 3B NETlog
TM .
6. Applications
Measurements on simple harmonic oscillations.
Observation of frictional forces.
Investigations of Hooke’s Law.
Measuring the forces on a truck on a track.
Investigation of the forces in pulley systems.
7. Sample experiments
Measuring the acceleration in a damped mass-
and-spring oscillating system
Equipment needed:
1 3B NETlog TM U11300
1 3B NETlab TM U11310
1 Force sensor, ± 50 N U11354
1 Tripod stand U13270
1 Stainless steel rod, 750 mm U15003
1 Helical spring, 5 N/m U8401010
1 100 g weight, from set of weights U30016
• Set up the experiment as shown in fig. 1.
• On the 3B NETlab TM , open the application
(template) for the experiment with the ± 50 N
force sensor.
• Attach the weight to the helical spring and
hang the spring on the force sensor. Ensure
that there is nothing hindering the oscillation
motion.
• Pass the connecting cable of the force sensor
over the sensor and coil it around the stand as
shown in Figure 1.
• Steady the weight by hand so that it is
motionless on the helical spring.
• Select the ± 5 N measurement range.
• Press the tare button of the force sensor and
set the pointer to zero in the display of the
3B NETlog
TM .
• Pull the weight down manually to the level of
the stand base and release it.
• Start the recording of the force curve on the
3B NETlab
TM (see fig. 2).
• Interpret and evaluate the curve.