A technician is calibrating a hopper scale using the substitution method. What does this method involve?
-
A
Using certified test weights to establish span, then replacing them with bulk material of known weight
-
B
Substituting a new indicator for the old one without recalibrating load cells
-
C
Running the scale with no hopper to establish a baseline
-
D
Replacing all load cells simultaneously to avoid mismatch errors