Magdeburg Plates
012–07190B
10
Measuring the vacuum pulled and observe the rate of decay using
ScienceWorkshop
Introduction
You can use a
ScienceWorkshop
Interface, computer, and Pressure Sensor to
monitor the pressure in the chamber between the plates.
Procedure
1.
Assemble the Magdeburg plates so the chamber pressure can be
monitored with a Pressure Sensor and ScienceWorkshop Computer
Interface (Figure 3.1)
2.
Set up the
Pressure Sensor
in your data
acquisition
software
(DataStudio or
ScienceWorkshop
and open a
Graph display.
3.
Set the
sampling rate
on the Pressure
Sensor to 1
sample/s.
4.
Start collecting
data.
5.
Pull a vacuum
in the chamber
with the syringe.
6.
Allow the plates to sit undisturbed for a few minutes.
7.
Every minute or so, try to break the plates apart.
8.
Note the pressure at which you were successful at breaking apart the
plates, and calculate the force that was required. (Use the procedure
detailed in Activity 1.)
Note:
When using the CI-6533 Differential Pressure Sensors, you must subtract the
atmospheric pressure at your location by measuring it with a mercury barometer, with
a CI-6531 Barometer, or by calling the local weather bureau. If you are not near sea
level, be sure that the reading has not been “corrected to sea level” as is commonly
done. A call to a local weather station should request “station pressure not corrected
to sea level.” 101kPa is a typical value at sea level.
Activity 3
5
10
15
20
25
30
35
40
45
50
55
60
cc
Pressure Sensor
H
E
to
ScienceWorkshop Interface
F
Figure 3.1
Experiment Setup for Activity 3
