I was a member of the HPS Lab Accreditation Committee for a few years before the HPS abandoned that worthwhile project. ISO17025 was a big part of our assessment steps. Tamper seals were not stated as a requirement but "practical steps to prevent tampering" are a valid point.
Los Alamos does not require tamper seals. But some of our accessible calib controls have covers on them. All of our "smart" instruments have passwords that prevent tampering of the cal parameters. We tell the users to use ONLY specific replacement batteries AND we try to make those specific batteries available. A broken tamper seal or an indication that unauthorized adjustments had been made would be an item of discussion at our routine Instrument Working Team meetings. Battery checks, zero checks, operational checks, and response checks are required before use in the operating procedures. We are working towards having only calibrated sources for operational checks. An operational check requires a specific response to a calibrated source while a response check only requires a meter response to the source. Tom, LANL On Tue, April 9, 2019 1:24 pm, Tom Meek via Powernet 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 > > _______________________________________________ > Powernet mailing list > [email protected] > http://hpspowernet.org/mailman/listinfo/powernet_hpspowernet.org > _______________________________________________ Powernet mailing list [email protected] http://hpspowernet.org/mailman/listinfo/powernet_hpspowernet.org
