Pact digital scale

[BR93]

Hi there I have just recieved a pact digital scale and no instruction manual. I need to calbrate it but have no clue. It is under reading by approx 30grns.
Can anyone help please. Cant find a model # its the one with the red cup.

 

[benjamin199]

I have a PACT with the red cup also.
Here is how I calibrate mine.
Let it warm up for 15 Min's.
Scale should be reading 0.0
Push the CAL button, scale should flash between CAL and y--n.
push the yes button scale should go to 0
make sure all weights are off the scale and push cal again.,this calibrates the scale at zero weight) next it will ask for 20. Place your 20gram weight on the scale and push cal. it will now cal at 20.
follow this same procedure for 50g and 70g,70 uses both weights), then back to zero one more time. Now the scale should read 00.0 and you are done. I calibrate mine without the pan and use the pan weight as a final check, then zero the scale with the pan, and start reading charges.
Ben