Davis Besse does not

From: Powernet <[email protected]> On Behalf Of Ephraim via 
Powernet
Sent: Wednesday, April 10, 2019 10:39 AM
To: [email protected]
Cc: Ephraim <[email protected]>; Mark Tursa <[email protected]>; 
Jim VanLooven <[email protected]>
Subject: [EXTERNAL] Re: [Powernet] RP field instrument tamper seals

Ontario Power generation does not
Ephraim Schwartz

On Apr 9, 2019, at 3:24 PM, Tom Meek via Powernet 
<[email protected]<mailto:[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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