What is the best procedure for calibrating / certifying our Calipers?

T

Tony Grover

#1
We primarily use calipers for inspection. We have a set of gage blocks certified to NIST. What is the procedure for certifying our Calipers. We are going for ISO9002 in 98 and QS9000 in 99. I know we have a lot to learn in this area. Is anyone willing to help us get started down the right track.
thanks.
 
Elsmar Forum Sponsor

Marc

Hunkered Down for the Duration
Staff member
Admin
#2
You have two choices for your calipers:

1. Send them out for calibration.

2. Work up a procedure for calibation and use your gage blocks to verify the calibration of the calipers.

How's that for starters?
 
#3
And to add .. if you use the 2nd method (recommended .. thats what we do) make sure you have a procedure to regularly send out the gage blocks for calibration to NIST.
 
S

SCOTT SNYDER

#4
ALSO MAKE SURE YOU HAVE A CYLINDRICAL RING GAUGE AND ENOUGH BLOCKS TO CHECK THE COMPLETE RANGE OF ANY CALIPERS YOU HAVE(ie. 12",6", etc.)
 
S

sarasheed

#6
We are using Stick Type of Michrometers to measure the Internal Diameters from 50 mm to 1500mm.This michrometer consists of a Michrometer Head and set extension rods which if assembled will read upto 1500 mm.I want to know how to calibrate this type of Michrometer.At preselnt we calibrate the Michrometer Head for the Pitch deviation and and attach the reading of each individual extensiln Rod in the calibration certificate .This Certificate is will be there along with the Michrometer during its use.

I request somebody to react to this method.Is it serving the purpose of calibration?.Can somebody suggest any other method.
 

Hershal

Metrologist-Auditor
Staff member
Super Moderator
#7
The basic approach seems OK, although I would point out that you also need to take into account what is known as "wringing", that is the joining of gage blocks - or in this case rods - to obtain a given length. The normal value given to ringing is 0.00005 inch per wringing. Thus, joining five rods will have four junctions, or wringings, with a total number of 0.0002 inch.this goes into the uncertainty calculations also.

There are likely some other sources of error you should take into account, but aside from temperature and RH it would be difficult to say which, without knowing the specific situation.

Hope that helps.

Hershal

Moderator's comment:
"Wringing" is the action of putting two blocks or rods together and giving a slight twist to "wring" the air out from between the blocks and form a vacuum which helps hold the blocks together from the outside air pressure pushing the blocks together. In some cases, the block can be suspended upside down and will not separate. To disengage the blocks, they are "unwrung." -Wes Bucey
 
Last edited by a moderator:
S

sarasheed

#8
:thanx:
Thanking you for giving reply to my doubt about calibration of Stick type Inside Michrometers.

S.A.Rasheed
 
C

celestica - 2005

#9
calibration of Vernier Calipers

To calibrate vernier calipers, we use Mitutoyo Caliper Checker. We only use gage block for checking the depth.
 
Thread starter Similar threads Forum Replies Date
L Best procedure and for nomenclature system ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 3
A Gage R&R for Pressure Transducers - What GR&R procedure / formula (standard) is best? Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 3
qualprod Best practice to ensure inputting of data in production Lean in Manufacturing and Service Industries 5
M Best profilometer for the money General Measurement Device and Calibration Topics 22
P Best Global Option to become an OBL/PLM/Virtual medical device brand in 2020 Other Medical Device Regulations World-Wide 2
earl62 What is the best way to control special characteristics in Control plan? Is it Mandatory to have SPC for IATF 16949? IATF 16949 - Automotive Quality Systems Standard 7
J ISO 13485 System 'soft start' - How to best reflect this in initial audits, management review minutes and other records? ISO 13485:2016 - Medical Device Quality Management Systems 3
S What is the best method to bond urethane foam to urethane foam? Manufacturing and Related Processes 4
Watchcat Best Regulatory Oversight for Off-Shore Device Manufacturing? Other Medical Device Regulations World-Wide 1
E Best way to keep up with pharmaceutical quality knowledge and current affairs Service Industry Specific Topics 1
K Best Measurement Systems Demos in California? General Measurement Device and Calibration Topics 1
qualprod Best approach to get a real value as average? Statistical Analysis Tools, Techniques and SPC 6
CPhelan Best metrics for monitoring low volume (<1000) parts per vendors Supply Chain Security Management Systems 1
DuncanGibbons Best practice for identifying "items" of parts for DFMEA analysis AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 2
I What kind of wine best complements the Friday that you close out your external audit findings? Opinions are welcome. Coffee Break and Water Cooler Discussions 12
I Non-Conformance vs OFI -- your best descriptions ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 61
A What are Practical data center best practices IEC 27001 - Information Security Management Systems (ISMS) 0
G Best Practices for IT auditing - Is a session-id necessary for a complete audit trail? IEC 27001 - Information Security Management Systems (ISMS) 0
S Best software for customer support/complaints? Customer Complaints 0
R Bill of Materials for a complex product - Industry best practice ISO 13485:2016 - Medical Device Quality Management Systems 2
G Oversized Threads - What sized stab pin would be best to quickly check for oversized thread holes General Measurement Device and Calibration Topics 5
D What is the best software used for the pharma compliance management? Pharmaceuticals (21 CFR Part 210, 21 CFR Part 211 and related Regulations) 0
M Informational MHRA launches consultation on how to best engage patients and the public Medical Device and FDA Regulations and Standards News 0
optomist1 Mobility Field Manufacturing Best - Worst Practices Manufacturing and Related Processes 5
qualprod Best criteria to measure Corrective Action effectiveness - Poor Maintenance ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 10
N Best practices for capturing audit objective evidence in a practical manner? Internal Auditing 3
S How to Learn all aspects of ISO 27001:2013 | The best way to grab the knowledge on 27001:2013 (Step by Step) IEC 27001 - Information Security Management Systems (ISMS) 7
I Best visual description for SOPs? ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 18
Z Best Practices - small volume medical device tube cutting (0.020" to 0.080" OD)? Manufacturing and Related Processes 3
M Over-labelling - Any requirements or best-practices? Other Medical Device Regulations World-Wide 0
M Informational DITTA White Paper on Cybersecurity: Best Practices in the Medical Technology Manufacturing Environment Medical Device and FDA Regulations and Standards News 0
M Informational BSI – MDR Documentation Submissions Best Practices Guidelines Medical Device and FDA Regulations and Standards News 0
K Which clause would best fit this Nonconformance? (Supplier Related) Internal Auditing 2
P How to have employees buy-in of quality procedures. Best practices? ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 8
S Expiry date vs. Best Before Date - Reagents ISO 13485:2016 - Medical Device Quality Management Systems 9
C Will anyone please share training material for ISO:13485:2016 for best practices Training - Internal, External, Online and Distance Learning 0
E Best GD&T training - Your suggestions and recommendations please Training - Internal, External, Online and Distance Learning 3
M Best Practice for setting tolerances on a Drawing Inspection, Prints (Drawings), Testing, Sampling and Related Topics 8
M PCBA Drawing Best Practices IPC Class 3 ISO 13485:2016 - Medical Device Quality Management Systems 1
Ron Rompen Best Practices in CMM Correlation Studies General Measurement Device and Calibration Topics 3
B Best place is to purchase IEC 60417 labels that will pass markings test IEC 60601 - Medical Electrical Equipment Safety Standards Series 1
P Best approach to tackle difficult certifications Career and Occupation Discussions 2
E Best Ways to Close a Project APQP and PPAP 3
S Opinions on the "Best" CMM for High Accuracy Machining General Measurement Device and Calibration Topics 9
C What is the best ISO 22000 template pack to purchase? Food Safety - ISO 22000, HACCP (21 CFR 120) 2
M Best Type of Grease for Vex Plastic Gears Manufacturing and Related Processes 5
W Which is best IAS academy in Chennai Career and Occupation Discussions 1
S Referencing procedures on Control Plans - Best Practices FMEA and Control Plans 3
somashekar Which Medical Device Regulatory Body you rate as the best Other Medical Device and Orthopedic Related Topics 6
P Best Method of Cleaning of Thread Ring Gages Calibration Frequency (Interval) 5

Similar threads

Top Bottom