AbidingDude
Mechanical
- Aug 17, 2015
- 13
Hello, I was wondering something regarding Handbook 44.
Table 4 lists the ranges to verify for scales depending on their capacity. (Up to 150kg, test 100% of capacity. 151 to 1500kg, test at least 25% of capacity, etc.)
Also, Section S.1.7 says that a scale should not give a numeric readout if >105% of it's capacity is exceeded.
However, that just sounds like a maximum possible overload reading - not a mandate that a scale read up to 105%. A scale manufacturer could make a model that shows overload at 103% or 100.5%.
So when testing or calibrating a scale, you should have numbers to work with all the way through. You should know what the deviations are at the low middle and high points.
How can you be guaranteed a positive deviation output at full capacity?
Table 4 lists the ranges to verify for scales depending on their capacity. (Up to 150kg, test 100% of capacity. 151 to 1500kg, test at least 25% of capacity, etc.)
Also, Section S.1.7 says that a scale should not give a numeric readout if >105% of it's capacity is exceeded.
However, that just sounds like a maximum possible overload reading - not a mandate that a scale read up to 105%. A scale manufacturer could make a model that shows overload at 103% or 100.5%.
So when testing or calibrating a scale, you should have numbers to work with all the way through. You should know what the deviations are at the low middle and high points.
How can you be guaranteed a positive deviation output at full capacity?
