take powder pan off platen, depress cal button.
"C 0" appears, with platen clear depress "CAL"
------- appears momentarily, then "C 50"
place 50gram wt on pan and depress "CAL"
------- appears momentarily, then "C 100"
place 100gram wt on pan and depress "CAL"
------- appears momentarily, then "100.00g" appears until you take the weight
off. Scale and display automatically returns units to grains and 0.0.
put powder pan back on platen, zero scale and commence dumping powder.