User's Manual

ManualsBrandsPASCO Specialty & Mfg. ManualsTool StoragePASCO Specialty & Mfg. STUDENT BELL JAR SE-9790

Instruction Sheet

for the PASCO

Model SE-9790

STUDENT BELL JAR

012-07194A

08/99

$1.00

Introduction

The PASCO SE-9790 Student Bell Jar

demonstrates the effect of air pressure on the

boiling point of a liquid, on the size of a balloon,

on the size of a marshmallow, and on the holding

power of a suction cup. It also demonstrates that

air has mass.

The syringe and one-way check valve system

constitute an inexpensive vacuum pump.

An extra connector is provided to permit the

Student Bell Jar to be connected to a PASCO

Pressure Sensor (Absolute, CI-6532 or

Differential, CI-6533), allowing the monitoring of

the pressure inside the chamber.

Equipment

INCLUDED

Part Label Part Name

A bell jar top with connector

B bell jar bottom with O ring

C plastic cup

D suction cup

E tubing with check valve

F tubing with T and check valve

G 60 cc syringe

H tubing for connection with a

PASCO Pressure Sensor

I balloon

Note: Parts E, F, and G constitute the vacuum pump

ADDITIONAL SUGGESTED

• ScienceWorkshop Interface (300, 500, 700, or 750)

• computer and data acquisition software

(ScienceWorkshop or DataStudio)

Summary of content (4 pages)

PAGE 1
012-07194A 08/99 $1.00 Instruction Sheet for the PASCO Model SE-9790 STUDENT BELL JAR C I 5 10 A G 15 D 20 25 H 30 35 40 45 50 55 F B Introduction The PASCO SE-9790 Student Bell Jar demonstrates the effect of air pressure on the boiling point of a liquid, on the size of a balloon, on the size of a marshmallow, and on the holding power of a suction cup. It also demonstrates that air has mass. The syringe and one-way check valve system constitute an inexpensive vacuum pump.
PAGE 2
Student Bell Jar 012-07194A Basic Setup and Operation • Press the suction cup onto the base of the bell jar. • Half-fill the plastic cup with very hot coffee, and place it on the base of the bell jar (Figure 3). E 4. Put the lid on the bell jar, hold it there firmly, and pump the piston of the syringe 10 to 15 times.
PAGE 3
012-07194A Student Bell Jar Setup to Monitor the Interior Air Pressure Monitoring the Interior Air Pressure 1. Connect part H to the hose connector on part A (Figure 4). 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. 2. Connect part E to part H. 3. Connect part F to part E. 4.
PAGE 4
Student Bell Jar 012-07194A Safety Considerations Limited Warranty This set is intended to be used by teachers, and their students while working under appropriate supervision. PASCO scientific warrants the product to be free from defects in materials and workmanship for a period of one year from the date of shipment to the customer. PASCO will repair or replace, at its option, any part of the product which is deemed to be defective in material or workmanship.