Put the pice to be tested on the anvil rase the pice to be tested until
it almost macks contact with the diamond
Watch the small needle and rase the pice to be tested so the small
needle TURNS 3 TIMES and stops on the
dot.This is your 10 kg load . Turn the outside of large dial to read 0
with the big needle , now turn the handle to let the weights down this
is your 150 kg load .the 150 kg load should come down very slow there
is a pistion with oil in it you can adjust how fast the 150 kg load
comes down.Watch the big needle untill it stops .Now turn the handle to
take the 150 kg load off . The reading on the big needle it your
hardness number.