PASCO SE-9790 STUDENT BELL JAR - Manual (Page 3)

012-07194A Student Bell Jar
3
Setup to Monitor the Interior Air Pressure
1. Connect part H to the hose connector on part A
(Figure 4).
2. Connect part E to part H.
3. Connect part F to part E.
4. Connect the syringe to the T of part F.
5. Connect the Absolute Pressure Sensor to the T on
part H.
Plug the Pressure Sensor into analog channel A on
your ScienceWorkshop computer interface.
Figure 4
Setup with the Pressure Sensor and a
ScienceWorkshop computer interface
Monitoring the Interior Air Pressure
After you have completed the setup that has just been
described, set the Pressure Sensor up in your data
acquisition software (ScienceWorkshop or
DataStudio), and open a Graph display. When you are
ready to start pulling the vacuum, start collecting data.
Bell Jar and O ring
The bell jar and O rings should be kept clean—free of
dust.
• Use mild dishwashing soap and water to clean.
Cautions:
• Do not use abrasives.
• Do not use organic chemicals.
Note: Vacuum grease should not be necessary
on the o-rings or connectors, and use of it will
attract dust and dirt.
Syringe
• Glycerin may be used on the plunger, but
normally, no lubricant is required.
Caution:
• Do not use any petroleum-based lubricant on the
syringe. The plunger is very intolerant to
petroleum-based substances.
Maintenance
5
10
15
20
25
30
35
40
45
50
55
60 cc
PRESSURE PORT 700 kPa MAX
DRY AIR ONL Y PRESSURE PORT MATING CONNECT OR: PASCO P ART NO. 640-021
H
E
F
Pressure Sensor