Hello All

Have I misunderstood the words in IEC62052-31?

In a hypothetical measurement of an applied voltage where the uncertainty of 
the exact value is 1% and a test voltage of 100 is required, the manufacturer 
would need to insist on a 101V test voltage and the test facility would have to 
insist on 99V.

Does this imply the test has to be applied twice?

Kevin

-----Original Message-----
From: John Woodgate [mailto:jmw1...@btinternet.com]
Sent: Thursday, September 22, 2016 4:13 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Measurement Accuracy

Thank you.

With best wishes DESIGN IT IN! OOO – Own Opinions Only www.jmwa.demon.co.uk J M 
Woodgate and Associates Rayleigh England

Sylvae in aeternum manent.


-----Original Message-----
From: Balmukund Vyas [mailto:balmukund.v...@ymllabs.com]
Sent: Thursday, September 22, 2016 8:41 AM
To: John Woodgate <jmw1...@btinternet.com>; EMC-PSTC@LISTSERV.IEEE.ORG
Subject: RE: [PSES] Measurement Accuracy

It is in IEC62052-31; which I believe refers to IEC61010-1

-----Original Message-----
From: John Woodgate [mailto:jmw1...@btinternet.com]
Sent: Thursday, September 22, 2016 11:28 AM
To: Balmukund Vyas; EMC-PSTC@LISTSERV.IEEE.ORG
Subject: RE: [PSES] Measurement Accuracy

Which standard has that very sensible text?

With best wishes DESIGN IT IN! OOO – Own Opinions Only www.jmwa.demon.co.uk J M 
Woodgate and Associates Rayleigh England

Sylvae in aeternum manent.


-----Original Message-----
From: Balmukund Vyas [mailto:balmukund.v...@ymllabs.com]
Sent: Thursday, September 22, 2016 5:05 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Measurement Accuracy

It might be worth mentioning the text from one of the safety standard as below :
If, when carrying out a conformity test, there is any uncertainty about the 
exact value of an applied or measured quantity (for example, voltage) due to 
the tolerance:
a) the manufacturer should ensure that at least the specified test value is 
applied;
b) the test house should ensure that no more than the specified test value is 
applied.

B M Vyas

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