1. Be a good controller¶

To use the laser, two people are needed:

Both roles are needed to work with a laser safely.

In this lesson, we practice being a good controller.

Procedure for the operator

Step	Do	Check by operator
1	Say 'Air is on'	The green light is on
2	Say 'I am wearing my goggles'	You have your goggles on
3	Say 'You are wearing your goggles'	You assistant has his/her goggles on
4	Say 'Those behind us are wearing their goggles'	All those behind you (if any) have goggles on
5	Say '3, 2, 1'	Nobody says 'stop'
6	Press start	Nobody says 'stop'
7	Say 'Laser is on'	Laser is on, hand is on laser casing
8	Say 'All is well'	No fire
9	Say 'Laser is off'	Laser is on

In this session, we never start the laser. All the operator says is 'Laser is on'.

Exercise 1: test the operator¶

Take off your glasses
Let the operator start the procedure
During countdown, say 'stop'
However, in step 3, the operator must stop the procedure. You and the operator pass if the laser is not started

The operator takes off his/her glasses
Let the operator start the procedure
During countdown, say 'stop'
However, in step 2, you or the operator must say 'stop' to stop the procedure. You and the operator pass if the laser is not started

Turn off the air flow
Let the operator start the procedure
During countdown, say 'stop'
However, in step 1, you or the operator must say 'stop' to stop the procedure. You and the operator pass if the laser is not started

Do the following 5 times:

A certified operator tells the controller secretly to:
- Do the right thing
- Put off glasses
A certified operator tells the operator secretly to:
- Do the right thing
- Put off glasses
- Turn off the air flow
Do the procedure
If the laser is turned on when it should not, the exam is failed