How is a "Growl" test accomplished?

[Robert Gift]

Is the voltage to the motor dropped?
How? Through a resistor?
Or is the power rapidly pulsed?

Thank you,

[Gil]

By pushing the Test button, which is a temporary contactor.
When using the Test button, the siren only stays on for as long as
you push the button.

[Jim_Ferer]

What TeleTech said. You just don't let the motor wind up all the way.

[Robert Gift]

Thank you, both.

I assumed it was built into the controller and maintained a certain low speed for a preset time.

[SirenMadness]

Some people may even energize the switch manually.

[Robert Gift]

When we get our 2t22 operating, we will have a manual switch and quartz clock with instructions how long to turn the switch on and how long off for a tornado warning.

What would the proper timing be?

I would actually prefer to do it myself.

But eventually I'll build a timer
so the siren can be operated and personnel leave to take shelter.

Firefighters may be out on a call.
Stage 3 is having a remote trigger so no one need be present to initiate the warning. (I may make it pager activated!)

[SirenMadness]

You could buy a cam-operated timer from Siren Central.

[Robert Gift]

You could buy a cam-operated timer from Siren Central.

Yes. But would not that be expensive?

I tried to find the control box for the 2t22 but it was apparently scrapped.
The 2t22 atop it's 45 foot pole was too far out of reach to scrap.

[SirenMadness]

Cam-controlled timers can be pretty cheap.

[q2bman]

I got some 12 volt electronic timers with multiple settings and outputs for about $5 from allelectronics.com

The timer will operate a heavy contactor to controll the siren.

You could set a wail, steady and ever a fast wail for kicks!