The Elsmar Cove Business Standards Discussion Forums More Free Files Forum Discussion Thread Post Attachments Listing Elsmar Cove Discussion Forums Main Page
Welcome to what was The Original Cayman Cove Forums!
This thread is carried over and continued in the Current Elsmar Cove Forums

Search the Elsmar Cove!

Wooden Line
This is a "Frozen" Legacy Forum.
Most links on this page do NOT work.
Discussions since 2001 are HERE

Owl Line
The New Elsmar Cove Forums   The New Elsmar Cove Forums
  Measurement, Test and Calibration
  Calibration Reports and Checks

Post New Topic  Post A Reply
profile | register | preferences | faq | search

UBBFriend: Email This Page to Someone! next newest topic | next oldest topic
Author Topic:   Calibration Reports and Checks
Prasanna Kumar
unregistered
posted 12 March 2001 09:22 AM           Edit/Delete Message   Reply w/Quote
Hi,
I am working in a project as a process control engineer. I need to check the calibration certs issued by our subcontractor. Could you please let me know how to ensure that proper calibratin of the instruments has been done. The subcontractorhas got the calibration done from the third party & the report includes
NIST Std , Uncertanity level (k=2, 95% confidence level). Do I have to ask for Acuracy Ratio (TUR or TAR). Appreciate if you could let me know what to check, as I have to certify that calibration has been done properly.

Prasanna

IP: Logged

DICKIE
Forum Contributor

Posts: 46
From:Romulus, MI, USA
Registered: Feb 2001

posted 12 March 2001 01:48 PM     Click Here to See the Profile for DICKIE   Click Here to Email DICKIE     Edit/Delete Message   Reply w/Quote
You can determine the TUR yourself by appling the stated uncertainty to you part specifications. A ratio of 4:1 seems to be the direction everyone is going.

IP: Logged

Sam
Forum Contributor

Posts: 244
From:
Registered: Sep 1999

posted 13 March 2001 09:12 AM     Click Here to See the Profile for Sam   Click Here to Email Sam     Edit/Delete Message   Reply w/Quote
"Appreciate if you could let me know what to check, as I have to certify that calibration has been done properly."

You should NOT certify anyone on the basis of a cert. First you should determine if the lab is qualified by performing an audit to a specified standard. The audit should be performed by members of purchasing, quality and possibly engineering and Mfg.

IP: Logged

DICKIE
Forum Contributor

Posts: 46
From:Romulus, MI, USA
Registered: Feb 2001

posted 15 March 2001 03:49 PM     Click Here to See the Profile for DICKIE   Click Here to Email DICKIE     Edit/Delete Message   Reply w/Quote
I agree with Sam unless the lab is accreditted to either ISO guide 25 or ISO 17025 by a recognized body (AL2LA, NAVLAP).

IP: Logged

KeithKokal@aol.com
Lurker (<10 Posts)

Posts: 6
From:Mentor, OH, USA
Registered: Mar 2001

posted 18 March 2001 09:49 AM     Click Here to See the Profile for KeithKokal@aol.com   Click Here to Email KeithKokal@aol.com     Edit/Delete Message   Reply w/Quote
ISO/IEC 17025 lists specific certification requirements. The format is easy to follow and could even be used as a check list. On the issue of auditing the lab, unless your company has trained assessors, you would just be visiting the lab and looking for stickers. In todays world, assessing a lab requires a metrologist. Items to be determined at the lab : are the labs stated uncertainties realistic? how did the lab do in their proficiency testing? are theri calibration procedures consistant with other labs ?. I would on use labs accredited by A2LA (www.a2la.org).

------------------

IP: Logged

All times are Eastern Standard Time (USA)

next newest topic | next oldest topic

Administrative Options: Close Topic | Archive/Move | Delete Topic
Post New Topic  Post A Reply Hop to:

Contact Us | The Elsmar Cove Home Page

Your Input Into These Forums Is Appreciated! Thanks!


Main Site Search
Y'All Come Back Now, Ya Hear?
Powered by FreeBSD!Made With A Mac!Powered by Apache!