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Reading a question posted on a non-Grand Design forum got me to wondering, so I contacted the CAT scale company to ask about resolution (the smallest possible change of a quantity which can be reliably measured by a sensor) and accuracy of CAT scales. I received a very prompt reply from them and thought some might be interested:
"The variance of our scales is established in the National Institute of Standards and Technology Handbook 44 Table 6. Class IIIL scales are allowed one division, or a 20 pound variance off zero for each 10,000 pounds of weight applied.
Most calibration tests preformed by either the State Weights and Measures or a licensed scale service company will use a minimum of 20,000 of certified test weights. In the case of a 20,000 pound test, anything beyond a 40 pound error in reading would be a failed test.
In the case of CAT Scale, all of our scales are calibrated at least four times per year by a licensed service company and we require the calibration to be adjusted to zero error."
So... with my 25,020 lb. combined weight, that number could be up to 50 lbs. off either way.
Rob
Reading a question posted on a non-Grand Design forum got me to wondering, so I contacted the CAT scale company to ask about resolution (the smallest possible change of a quantity which can be reliably measured by a sensor) and accuracy of CAT scales. I received a very prompt reply from them and thought some might be interested:
"The variance of our scales is established in the National Institute of Standards and Technology Handbook 44 Table 6. Class IIIL scales are allowed one division, or a 20 pound variance off zero for each 10,000 pounds of weight applied.
Most calibration tests preformed by either the State Weights and Measures or a licensed scale service company will use a minimum of 20,000 of certified test weights. In the case of a 20,000 pound test, anything beyond a 40 pound error in reading would be a failed test.
In the case of CAT Scale, all of our scales are calibrated at least four times per year by a licensed service company and we require the calibration to be adjusted to zero error."
So... with my 25,020 lb. combined weight, that number could be up to 50 lbs. off either way.
Rob
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