Blitz DCII Turbo timer beeping

[fwuffy squirrel]

Hey guys I was just sitting here thinking and wanted to see if any of you might know. I have a Blitz DCII turbo timer (It's the silver one if that matters)

http://www.calienteautomotive.com/photos/DTT_DCII.jpg

and back a few years ago before I messed up my car, it used to turn red, flash and beep when I went into boost. I had a bad air flow meter or sensor at the time so I wouldn't get power over 3k rpm.
Not sure if that was why but anyway does anyone have this TT and have the same thing happen? Do you know how to turn it on/off? Now that my car is repaired I am playing with it and it doesn't go red and beep anymore. Just kind of curious to see if this happens to anyone else.

[Razi]

Keep pressing the Power button until you get to the "WARN" screen, when I'm on that screen for my Blitz DTT, it turns red.

Then you use the other buttons to set the amount of pressure you want the warning to come on.