3B SCIENTIFIC PHYSICS 1002977 Instrucciones De Uso página 5

pansion for a certain temperature rise
tubes are heated to 100° C by means of steam and
the temperature difference
is calculated. The expansion is determined from the
movement of the pointer, where a pointer movement
of 50 mm indicates an expansion of 1 mm. The
expan-sion coefficient is determined from the length
of the tube l between the two fixed points by means
∆
of the formula:
∆
l
α = ___
l
⋅
4. Instructions for use
 Attach the fixed mount at marking 200, 400 or 600.
 Attach the open end of the tube to be tested into
Figure 2
T . Thus the
∆
T from room temperature
∆
∆ T
Technical amendments are possible
the fixed mount and secure it with the screw. The
screw should grip the ring nut of the tube.
 Hoses should be attached as in Figure 1 and the
run-off bowl should be placed under the hose.
 Adjust the point to zero if necessary.
Also required for heating the tube under test:
Vapor generator or a bunsen burner heating an Erlen-
meyer flask
The glass tube should be secured beneath the base strip to
avoid damage.
4
5. Storage