Fixing of tolerance limit - Electronic weighing balance with the capacity of 150 Kgs

[raghu_1968]

We have the electronic weighing balance with the capacity of 150 Kgs.

Its least count is 0.02 kg.

We need to do the performance check of the balance on daily basis before weighing activity is carried out. The query is How to fix the tolerance /error limit for this balance?

Literature reference if any will also help.

 

[raghu_1968]

Re: Fixing of tolerance limit - Electronic weighing balance with the capacity of 150

Can we give the Least count as the tolerance? In this case ±0.02

 

[Marc]

Re: Fixing of tolerance limit - Electronic weighing balance with the capacity of 150

"Bump" - Can anyone help with this question? My Thanks in advance!

 

[Anbu8894]

Re: Fixing of tolerance limit - Electronic weighing balance with the capacity of 150

Hi

Fixing of tolerance depends upon the what product your going to weighing.

If it is more accurate product tolerance will be very less.

As a user, you only decide that.

 

[raghu_1968]

Re: Fixing of tolerance limit - Electronic weighing balance with the capacity of 150

Mostly chemicals which are used for the manufacture of drug substance and its intermediates are measured.

 

[dwperron]

Re: Fixing of tolerance limit - Electronic weighing balance with the capacity of 150

Raghu,

We need more information here.

First, the tolerance for the scale most always includes more than the least count. There should also be linearity and repeatability tolerances. Sometimes a manufacturer will combine them into a single accuracy tolerance. Do you have the manual? The tolerances should be there. If not, please give us the manufacturer and model and we will see what we can find out.

As for the daily check, how much are you typically weighing on this scale? What kind of accuracy does your process require for your measurements? With this kind of information you can come up with a reasonable daily check method.