Internal Calibration vs. Accredited Calibration for Balance - Differences

N

neoth

#1
Hi All,

i have a few analytical and precision electronic balance.

currently i am using check weights to perform my own calibration of the balance.

the check weights is also been send to a accredited lab for calibration.

my question is:
what is the difference of me using the check weights to calibrate the balance and engaging a 17025 accredited lab to do the calibration of my balance?

Thanks.
 
Elsmar Forum Sponsor
#3
Hi All,

i have a few analytical and precision electronic balance.

currently i am using check weights to perform my own calibration of the balance.

the check weights is also been send to a accredited lab for calibration.

my question is:
what is the difference of me using the check weights to calibrate the balance and engaging a 17025 accredited lab to do the calibration of my balance?

Thanks.
The difference is going to depend on how much you know about the science of calibration! It's difficult to give you an answer, but, do you know how to calculate the measurement uncertainty? The key difference between you and a lab is that they will have established the factors which affect the results of calibration and factor those into their reporting of the results.
 

drgnrider

Quite Involved in Discussions
#4
As our ?in-house calibrator?, for us, it depends on: what accuracy we require, what degree of error is acceptable, and how critical this device is to our processes.

ALL my master standards are sent out. Most everything else I calibrate in-house since my measurements are well inside the allowable tolerance threshold of any of parts we make. Some items that require tighter tolerance than I can achieve, I send out.

It all comes down to ?what degree of risk is acceptable??
 
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