DMM Multimeter - Perform a complete MSA study?

M

Miguel Gonzalez

#1
I have this question.
Looking at the MSA manual, I noticed that all examples are referred to mechanical instruments (calipers, micrometers, plug gages, pin gages, etc.) and I was trying t find an example of an electronic device like an oscilloscope or mutimeter, etc.
My question is;
If I have a multimeter in my control plan, do I have to perform a complete MSA study?
 
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C

Christian Lupo

#2
Miguel-

"Complete" in the context of an MSA study is a relative term, or depends on the equipment. You can do a "complete" MSA study on a voltmeter (or any of the other equipment you mentioned) if all you are checking is Bias, linearity, and stability.
 
M

Miguel Gonzalez

#3
Thanks for the fast response.
Actually, my question was more related to know if electronic devices (eg. multimeters)are to be considered into the msa element.
If yes, In case of a multimeter which it is used to measure DC Voltage, Do I have to perform bias, linearity and stability studies for that range only?
 
C

Christian Lupo

#4
If the multimeter is listed in the control plan you must perform an MSA in the range the instrument is used.
 
M

Miguel Gonzalez

#5
Christian,

Thanks for your inputs.
Your comments pretty much help me to solve my problem.
 
L

labgianpi

#6
i have a similar problem, to perform bias, linearity and stability studies, how many and which points do you use for every range?
 

Hershal

Metrologist-Auditor
Staff member
Super Moderator
#7
I have this question.
Looking at the MSA manual, I noticed that all examples are referred to mechanical instruments (calipers, micrometers, plug gages, pin gages, etc.) and I was trying t find an example of an electronic device like an oscilloscope or mutimeter, etc.
My question is;
If I have a multimeter in my control plan, do I have to perform a complete MSA study?
I suggest doing a thorough uncertainty study, then you will know everything that the DMM contributes to a given measurement.....then if you need to do MSA, you have all information on the meter, so you only need other contributions.
 
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