Grain scale question?

[South MS Bowhunter]

Hey guys due to some recent success and because the deer decided to roll over and break some arrows    

But when turning on my grain scale the one most have form 3 rivers it showed low on battery charge, so I replaced one battery (only had one available) to get me through the process for now.  But now my scale only shows G for weights instead of the normal gn for grains.  what do you do to adjust or fix?  Anyone else experienced this?  Would only adding one fresh battery cause this?

[MikeW]

You have to program it..you should be able to Google the model # and find the instructions for it or do the math 1 gram = 15.4 grains

[Old Chief]

Turn on and press the "MODE" button until gn appears.

[South MS Bowhunter]

Duh     ,  Thanks guys I thought I had pushed the Mode button but not hard enough to activate it functions.  Everything is cool now!