How to check the swing weight and just to have. The club I play at has a RDC but no one knows how to use it. So it is just a big paper weight.
To check the swingweight, you need to lock the grip of the racquet into the wice at the far right of the machine. The racquet face should be perpendicular to the ground and the buttcap should be as far back as it can go while still allowing the vice to close down on the grip. Then, press the swingweight button (#4 I think.) Here's a pic to help.
After the button is pressed, pull the racquet to one side (the vice should turn freely but only so far.) Once you have the racquet twisted to one side, let it go. After about 3-5 oscillations the machine will start flashing a number. Press "valid" (the last button on the right. #8?) This saves the number in the machine until you clear it. That's your swingweight.
Oh, and I'd be glad to teach them how to use it.