When doing a crossfloat between two deadweights say mine is built for my local gravity and the customers is standard gravity.
Do I need to adjust the formulas on my deadweight to change them to what they would be for standard gravity so that my data is apples to apples?
Or does it not matter since im testing in my local gravity and will see all the errors with my trim mass set?
Ive gotten couple different answers that conflict so I want to verify
That really depends on your local gravity. Say you live in Denver Colorado that could make a pretty big difference. Can you tell us where you live?
Im in houston at 979.289 compared to 980.665
You have to correct for gravity. Often I've seen dead weight testers, such as Pressurements, calibrated using standard gravity from the Mfr. This is fine as long as the users correct for the local gravity where it is being used. In your case, you would need to use corrections for the customers system to correct the readings to your local gravity.
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But the short answer is yes. Both testers have to be in the same units. And your UUT is in psi@980.665 cm/s2.
thanks oldave..
thats what I thought was correct and was told that by Ruska but one of head guys at Transcat doesnt think so...he used to work for Ruska also.
But in doing calculations I do convert my data from local gravity to standard so that all the data is at standard...then I give the customer data at my local gravity on their deadweight which is close to theirs so they can just do sum of errors with the data I give them so technically they dont have to calculate it..they are lazy..