Ontario Power generation does not

Ephraim Schwartz

> On Apr 9, 2019, at 3:24 PM, Tom Meek via Powernet <[email protected]> 
> wrote:
> 
> I have a question regarding tamper resistant seals for calibration on RP 
> meters.  A QA audit made a SFR (supplier finding report) at an instrument 
> calibration facility stating vendor should be placing these seals on our RP 
> meters.
>  
> The cited standard is ANSI Z540:1994 Section 11.5, but after some discussion 
> we agreed that this only applies to lab standards.  He also cited ISO 
> 17025:2017 Section 6.4.12 which states “the laboratory shall take practical 
> measures to prevent unintended adjustments of equipment from invalidating 
> results.”  The auditor said that industry interprets this as requiring tamper 
> seals, but also said that complying with the ISO standard was a matter of lab 
> certification only (not a regulatory requirement).
>  
> Does any site require tamper resistant seals on RP field instruments?  Yes    
> No
>  
> If yes how do you handle routine battery and/or desiccant replacement?
>  
> What do you do if a seal is found broken or missing.  In short, would the 
> event be entered into the corrective action system?
>  
> Do you rely on your source check and zero check of the instrument to 
> “validate” its calibration in lieu of the tamper seal?
>  
> Thanks in advance
> Tom Meek, CHP
>  
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