Using Caliper A to verify Caliper B - Verification of Calibration

Q

QAMTY

#1
Hi everybody

while defining the calibration and verification under 7.6 Control of monitoring and measuring equipment.

I have the following equipment:

1 caliper 150 mm named A

1 steel rule "Moore & Wright ER424" with 0.5 mm resolution
1 caliper 150 mm named B
1 micrometer.

In order to comply to standard, I sent all the equipment to an external supplier for the calibration and I have the certificates.

I have a print shop business, in fact we dont need tight tolerances
I accept +/- 1 mm in my product, in the past I have not had quality problems due to bad measurements.

Normally I use for inspection of the product the steel rule
The micrometer is used to measure sheets of paper and caliper is used to measure some ancillary equipment.

At this time I comply with calibration, but not for verification, for that, I have an idea.
The caliper A is a spare caliper, in case of failure of caliper B, the A is kept in a secure place and only will be used in such case.
Verification are planned every 6 months.

Question

Could I use the caliper A to verify caliper B, say measuring one part and comparing results, if such results fall within +/-1 mm, my caliper B is ok?
The same task it can be done with the micrometer, compared against caliper B, I dont want to spend money in gage blocks.

For the steel rule, I will only do visual inspection, (legible marks, numbers, etc.).

Other option it is not to verify the equipment and wait every year for the calibration of them, since our place is clean, measuring equipment is not
too much used, personnel take care of them, additionally my tolerances are not too tight.

Please shed light on me, give me some input

Thanks
 
Elsmar Forum Sponsor

hogheavenfarm

Quite Involved in Discussions
#2
Re: Using caliper A to verify caliper B, under ISO 9001 2008

I do something similar, I have a numbered level assigned to calipers used in different areas. Quality lab calipers are "-01" engineering is "-02" and shop is "-03". A 03 shop caliper can be calibrated agianst an 02 or 01, but not another 03. I use this all the way up the chain. QA calipers are calibrated against the gage blocks directly.
 

ncwalker

Trusted Information Resource
#3
Given the tolerances are loose, you could also just select a gage master.

You don't have to verify a caliper against an EXACT gage block.

You could, now that your equipment has been verified, measure some random block of steel laying around (with the obvious requirements of parallel side to side with no burrs).

Let's say your newly calibrated equipment agrees that this gage block is 12.85 mm thick. Now, you have a "master." It would be better if you had two, with significantly different values.

Label them, store them in a controlled location.

Any time between now and your next calibration, you can check your masters and know that your gages are still calibrated.

Calibration is all about measuring a known object with a study device and demonstrating the study device gives you the expected response. It does not have to be any certain size.
 

Ron Rompen

Trusted Information Resource
#4
Given the tolerances are loose, you could also just select a gage master.

You don't have to verify a caliper against an EXACT gage block.

You could, now that your equipment has been verified, measure some random block of steel laying around (with the obvious requirements of parallel side to side with no burrs).

Let's say your newly calibrated equipment agrees that this gage block is 12.85 mm thick. Now, you have a "master." It would be better if you had two, with significantly different values.

Label them, store them in a controlled location.

Any time between now and your next calibration, you can check your masters and know that your gages are still calibrated.

Calibration is all about measuring a known object with a study device and demonstrating the study device gives you the expected response. It does not have to be any certain size.
Although the process described above is functionally correct, it fails in one area - there is no traceability to a NIST (or equivalent) standard. Not sure if this is important to you or not - in your line of work I would not expect that it is.
Another option is to purchase several individual gauge blocks - the prices are not as steep as you might think. As long as you have the calibration certificates for THOSE (and calibrate them at a frequency that YOU feel is appropriate) then you are covered.
 
R

randomname

#5
Using your own blocks for Verification between annual Calibration intervals would likely be fine for your application.
 
Thread starter Similar threads Forum Replies Date
G How to compute or estimate a micrometer or caliper flatness using optical flat General Measurement Device and Calibration Topics 2
B Uncertainty in Length Measurement using a Caliper Measurement Uncertainty (MU) 3
D Calibration of Pin Gages using a Calibrated Caliper that measures to 4 decimal places General Measurement Device and Calibration Topics 15
Y We found out we have been using a equipment without validation for past 4 years Quality Manager and Management Related Issues 6
D Using Laboratory Notebooks in R&D and Design and Development ISO 13485:2016 - Medical Device Quality Management Systems 3
S Work performed in Canada on US patients using US device Canada Medical Device Regulations 1
S Is using ANSI/ASQ Z1.4-2008 the correct sampling plan to determine Pass/Fail of Apparel measurements? AQL - Acceptable Quality Level 4
A What are the pros and cons of using an audit software for internal auditing? General Auditing Discussions 4
Tagin Evaluating nonconformances for escalation using Bayesian methods? Statistical Analysis Tools, Techniques and SPC 2
D Using non-conforming components even though the final assembly is conforming? Manufacturing and Related Processes 5
B Using Unreleased Documents & Process Maps for Internal Audit purposes ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 12
R Clause 7.7 Replicate, Recalibration and Intermediate checks using Artifact ISO 17025 related Discussions 1
Stoic Are any medical device companies using the 2011 FDA process validation guidance instead of GHTF/SG3/N99-10:2004? 21 CFR Part 820 - US FDA Quality System Regulations (QSR) 1
B Unit of Use DI (Device Identifier) - Products using the same device US Food and Drug Administration (FDA) 0
A Using Arduino based sensors for Poke-Yoke Manufacturing and Related Processes 6
M Using your Manufacturer's ISO certification ISO 13485:2016 - Medical Device Quality Management Systems 5
Ed Panek Adverse Event Clinical Trial using a 510K approved Device Other US Medical Device Regulations 6
B Using non CE parts in a machine CE Marking (Conformité Européene) / CB Scheme 1
G Gauge R&R on multiple dimensions using 3D measurement system Capability, Accuracy and Stability - Processes, Machines, etc. 6
A Hospital IT expectations for connected medical device using WIFI Medical Information Technology, Medical Software and Health Informatics 0
Proud Liberal Cp / Cpk on position using multiple MMC bonuses Capability, Accuracy and Stability - Processes, Machines, etc. 2
B Using external FDA and ISO 13485 audit as internal audit Internal Auditing 6
D Using "Particle Size Standard" templates as gauges - How to avoid giving a gauge # while using for process control? General Measurement Device and Calibration Topics 2
J Class 1 Medical Device - Using a UPC over the UDI? 21 CFR Part 820 - US FDA Quality System Regulations (QSR) 0
I Reducing CE marking cost using manufacturer test reports CE Marking (Conformité Européene) / CB Scheme 5
CPhelan Using clinical trial safety data for evidence for CE marking EU Medical Device Regulations 7
M Accredited Calibration Sevice Provider using computerized system to issue calibration certificate Qualification and Validation (including 21 CFR Part 11) 3
M Accredited Calibration Sevice Provider using computerized system to issue calibration certificate General Measurement Device and Calibration Topics 2
M Raw stock material testing discrepancy using an XRF (x-ray fluorescence) analyzer Manufacturing and Related Processes 7
Z Using FMEA for Knowledge Management FMEA and Control Plans 6
Sidney Vianna NASA to Develop a Novel Approach for All-Electric Aircraft Using Cryogenic Liquid Hydrogen as Energy Storage World News 2
S How many of you are using Robotic process automation for calibration lab management? ISO 17025 related Discussions 0
J Including Repeats in DoE using Minitab Using Minitab Software 5
S Legal Manufacturer FDA Reporting Obligations for Using New Contract Sterilization Site Other Medical Device Regulations World-Wide 0
John Predmore What size pinhole can be reliably detected using visual inspection? Inspection, Prints (Drawings), Testing, Sampling and Related Topics 7
D I'm new in IMDS special using the IMDS application Manufacturing and Related Processes 8
John Broomfield Workplace by Facebook - Any other organizations using this collaborative tool? Misc. Quality Assurance and Business Systems Related Topics 0
I Flatness - Rectangular part using the three jack method Inspection, Prints (Drawings), Testing, Sampling and Related Topics 10
JoshuaFroud How important is using the "correct" GMDN? Other Medical Device Regulations World-Wide 13
A Overkill? Using the 3L5W tool on non-conformities Nonconformance and Corrective Action 3
M GD&T tolerance or band? Using a symbol like parallelism // Inspection, Prints (Drawings), Testing, Sampling and Related Topics 8
B Informational Expanded Gage R&R Analysis using Minitab Gage R&R (GR&R) and MSA (Measurement Systems Analysis) 18
S Evaluating the possibilities of using qmswrapper or greenlightguru Document Control Systems, Procedures, Forms and Templates 4
P Is it possible to make an educated decision using a very very small sample size? Inspection, Prints (Drawings), Testing, Sampling and Related Topics 3
V Using K-Factor(Tolerance Interval) Analysis for Design Verification Statistical Analysis Tools, Techniques and SPC 3
O Which is better - Quietly quit using a supplier or tell supplier? Supplier Quality Assurance and other Supplier Issues 11
A Capability Analysis for Packaging Seal Strength with spec. >0.1 Kgf using Minitab Using Minitab Software 6
J Layered Process Audits using Kamishibai Board Process Audits and Layered Process Audits 3
Q How can you justify using a more accurate Pin Gage class? General Measurement Device and Calibration Topics 16
S Basic Dimension W/O using FCF Inspection, Prints (Drawings), Testing, Sampling and Related Topics 4

Similar threads

Top Bottom