Programming Polar 76EM

Hi,

I was hoping somebody could help me out. We are trying to delete all programs on our 76EM but there are a few programs that are locked. I checked the operations manual we have but it's for an older version of the 76EM that stores only 9 programs. The one we have stores 99 programs.

Two requests for help:
1. How do we lock/unlock programs?
2. Does somebody have a operations manual?

Thanks in advance

 

In case anybody is looking for how to lock/unlock programs here are the instructions:

1: Press both P buttons
2: Program number should be flashing
3: Press the store program step button - the dot