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Physics 152 Set Up Instructions:
Measuring the Radioactivity of a Smoke Detector
with Pasco Geiger-Müller Tube
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The setup; Pasco Geiger-Müller tube, Science Workshop 500 Interface,
USB-to-serial cable, smoke detector, rods & clamps
A short (20 cm) rod threads into the G/M tube;
attach to long rod with right-angle clamp

The G/M tube plugs into Channel 1 of the Science Workshop Interface.
The USB-serial cable plugs in the back of the interface
Sort metal pieces into piles, place on
front bench
The following demo is set up on the instructor's bench:
Setup
The demo setup
Scope trace
The scope trace
Counter
The Geiger counter in action		 Counter connection
Connections on back of counter:
Middle wire to Geiger Tube
Bottom wire to Oscilloscope
Gray wire to Timer
Brown wire to 120V AC
Oscilloscope
See-thru oscilloscope		 Scope connection
Connection from counter
Geiger tube
Geiger tube with Radium source
(in small oval containers: Watson has them!)		 Geiger tube
Geiger tube in stand over source
Counter
High voltage gets set to 1000 volts		 Timer (with Jeff's thumb)
Turn timer on, or counter won't work!

 

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Revised: 19 Aug 19 Canton, NY 13617