P
Pharmagal
Hi:
My question may be a very basic, easy one to answer. Hope someone can help.
This is my scenario:
In manufacturing, 2 scales are used during filtration of liquid product from tank to a bag:
1) Floor scale: 0 to 1500 kg capacity, 1.4 kg tolerance, used to weigh a tank and tank with product. Gross weight of tank ? tare tank weight = amount of starting product to be filtered
2) Bench top scale: 60 kg capacity, 0.1 kg tolerance, used to weigh bag and bag with product. Gross weight of bag ? tare bag weight = amount of product filtered.
Combined tolerance of both scales = 1.5 kg.
I have situations where the amount of product filtered exceeded the amount of starting product available for filtration. Product #1 was over by 0.516 kg and product #2 was over by 1.761 kg. When manufacturing was questioned on how it is possible that more product was filtered than what was available for filtration, their response was that this can happen when 2 different balances are used. They concluded that product # 1 overage is well within the combined tolerance of the scales. For product #2, the overage is slightly more than the combined tolerance of both scales and manufacturing will investigate.
Since the gross weight of the tank is ~230 kg and the gross weight of the bag is ~ 18 kg, these amounts are on the low range of both scales. Shouldn?t manufacturing be applying a different tolerance other than the combined tolerance of 1.5 kg, which appears to be for the high range?
My question may be a very basic, easy one to answer. Hope someone can help.
This is my scenario:
In manufacturing, 2 scales are used during filtration of liquid product from tank to a bag:
1) Floor scale: 0 to 1500 kg capacity, 1.4 kg tolerance, used to weigh a tank and tank with product. Gross weight of tank ? tare tank weight = amount of starting product to be filtered
2) Bench top scale: 60 kg capacity, 0.1 kg tolerance, used to weigh bag and bag with product. Gross weight of bag ? tare bag weight = amount of product filtered.
Combined tolerance of both scales = 1.5 kg.
I have situations where the amount of product filtered exceeded the amount of starting product available for filtration. Product #1 was over by 0.516 kg and product #2 was over by 1.761 kg. When manufacturing was questioned on how it is possible that more product was filtered than what was available for filtration, their response was that this can happen when 2 different balances are used. They concluded that product # 1 overage is well within the combined tolerance of the scales. For product #2, the overage is slightly more than the combined tolerance of both scales and manufacturing will investigate.
Since the gross weight of the tank is ~230 kg and the gross weight of the bag is ~ 18 kg, these amounts are on the low range of both scales. Shouldn?t manufacturing be applying a different tolerance other than the combined tolerance of 1.5 kg, which appears to be for the high range?