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The Limits tab Empower 3

Posted: Mon Dec 24, 2018 9:06 pm
by EmpowersBane
I have an amount value that needs to be between 90-110 (ie whole numbers) so when im setting up Limits in the processing method, I tested a Lower Limit value of 90 and it gave a fault value for 89.99999987666 which I thought would have been ok since that number rounds to 90 when expressed as an integer. Empower obviously considers a value of 89.99999987666 as below 90 which actually makes sense as Empower always uses full values in the background for all its calculations.


My question is what value do I put in then for the Lower and Upper Limits to correctly fault any values outside of 90-110? I presume for the lower limit it would be 89.5 as this value is rounded to 90 at zero decimal places. For the upper limit I also presume the value would be 110.49999999999999 since that's the highest maximum allowable value before 111 i.e 110.5 onwards?


Any thoughts on this please?

Re: The Limits tab Empower 3

Posted: Mon Jan 21, 2019 9:22 pm
by digiversed
Hi,

This depends on what you state in your SOPs and TMs (sig figs / reporting precision), but if you don't want it flagged then you will have to do the following:

Lower_Limit= 89.95
Upper_Limit=110.05

The 89.5 and 110.5 are too far outside the spec.

Re: The Limits tab Empower 3

Posted: Tue Jan 22, 2019 5:12 pm
by EmpowersBane
Hi and thanks for reply.

An upper limit of 110.05 would flag a value of 110.3 when techincally 110.3 rounds to 110 as a whole number. Wouldnt 110.5 be better as this would flag any value of 110.5 (111 as a whole number) onwards?