I'm not endorsed on A109, but in the B206 FM it states to do a preliminary Hyd check at 70%N1 and then a full check at 100%Nr.
Cyclic control in "X" pattern (or figure 8) of about 1" and centre.
THEN collective 1 - 2 inches, 2 to 3 times.
Be gentle and smooth.
Beware of how far you lift the collective. You are at "full noise'. Don't get too light on the skids.
Remember you have a fully articulated rotor head and oleos/tyres underneath. (Ground res.)
Stick to the POH/FM for each type.