CPO Science

Workshop: The CPO Timer

Integrated Physics and Chemistry

What Is In The Case?

CPO Timer

2 Photogate Clamps

2 Phone Cords

AC Adapter

The Timer Mode of Operation

A & B Inputs, Buttons, & Lights

Memory & Reset

The Photogate

The red status light indicates when the Photogate and the CPO Timer are properly connected

clam p screw

refe rence m ark

status light

connect cord here

th readed hole

ho le for the light beam

The Stopwatch Mode

Select the “Stopwatch” mode

The “A” button starts & stops the stopwatch

Who has the fastest reflexes?

The Interval Mode The Interval mode can be used to measure the time

through an individual Photogate or the time between two Photogates

Connect one of the Photogates to the timer

Select the “Interval” mode

Turn on just light “A”

This will measure the time through Photogate “A”

Pass your finger through the Photogate

Turn on just light “B” for time through just “B”

Interval Through A & B

Select “Interval” mode

Turn both the “A” & “B” lights on

Pass your finger through the Photogates

Interval Through A & B

The CPO Timer will also record the time trough just “A” & “B” simultaneously

Turn both lights off

Turn on just “A” & then just “B”

Frequency Mode The CPO Timer determines

frequency by using the Photogates or the Sound & Wave Machine

The CPO Timer records two different frequencies simultaneously

Period Mode

The CPO Timer determines period by using the Photogates or the Sound & Wave Machine

The Timer updates the period every other cycle

The CPO Timer can monitor two different periods simultaneously

Counter Mode

This mode counts every time the light beam is broken

The CPO Timer can monitor two different Photogates simultaneously

Overview