3B SCIENTIFIC PHYSICS 1000738 Посібник - Сторінка 4
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3. Technical data
Range of heights
Switch contacts:
Start:
Stop:
Dimensions:
4. Set-up
Insert the stand rod into the socket in the
base plate as far as it will go, and turn it so
that the scale faces towards the red contact
plate.
Tighten the fixing screw using the Allen key
provided.
If the stand rod has been set up correctly, the
scale will be exactly at the correct height and
the instrument is ready for operation.
Fig. 1 Setting up the stand rod
5. Operation
The following equipment is also required to per-
form the experiment:
1 Digital counter/timer@230 V
or
1 Digital counter/timer@115 V
1 Set of experiment leads
Connect the free-fall apparatus to a timer.
Make sure you keep to the colour coding of
the sockets.
Set the release lever and adjust the height
of fall.
3B Scientific GmbH ▪ Ludwig-Erhard-Str. 20 ▪ 20459 Hamburg ▪ Germany ▪ www.3bscientific.com
20 to 960 mm
Mechanical
Electronic
3
200 x 130 x 730 mm
1001033
1001032
1002848
Subject to technical amendments
© Copyright 2022 3B Scientific GmbH
The height of fall can be read off the scale on
the rod and is referenced to the top edge of the
bore on the start fitting (see Fig. 2). The reading
on the scale corresponds to the distance cov-
ered, i.e. the distance between the ball and the
contact plate at the bottom.
Place the steel ball between the contact
pins from below so that it is held in place by
the retaining lug when the latter is pressed
down.
Allow the ball to fall by pushing lightly on the
release lever.
For optimum precision and reproducibility, the
release must be operated gently and carefully.
The micro-magnet moves away from the sur-
face of the ball. The start contact opens at the
instant the ball begins to fall.
When the ball hits the contact plate at the bot-
tom, the stop contact is opened briefly and the
time measurement is stopped.
Fig.2 Adjusting the height of fall