SBS - The best value in QMS software

Calibration Frequency of CMM as per ISO/IEC 17025

D

dandrewsca

#1
I have a customer asking if there is any documentation to state that the CMM must be calibrated every year or is 18 month intervals okay. Does anyone have anything in writing from 17025 that says this or is it just an industry accepted standard.
Thanks
Dan
 
Elsmar Forum Sponsor
#2
Dan:

There's nothing in ISO/IEC 17025 about such a thing. The selection of a calibration frequency is dependent on a number of issues, one being the stability of the equipment. If a cmm is located in a 'harsh' environment it may not even last 12 months before it needs a check! What's needed is data to help make the decision. Even the 'as new' calibration can give you a clue.

The best advice I've found is to start a schedule of intermediate checks, using an artifact - the ANSI ball bar test is one way - to see what kinds of readings you get. The manufacturer may suggest a yearly calibration, but without the data even that may be too frequent and the cmm may go much longer without a full blown calibration.
 

John Broomfield

Staff member
Super Moderator
#3
I have a customer asking if there is any documentation to state that the CMM must be calibrated every year or is 18 month intervals okay. Does anyone have anything in writing from 17025 that says this or is it just an industry accepted standard.
Thanks
Dan
Dan,

I agree with Andy. Your calibration process for each device should show how often you need to calibrate. Do not stick to manufacturer's recommended frequency because they do not know the circumstances of use. For example, is the device used once a month or once an hour? Another example, is the device used in a dusty environment or clean environment?

You may find that you are wasting money on too frequent calibrations or too infrequent verifications.

John
 
T

True Position

#4
Personally, I do not consider adjusting calibration intervals until I have a few years of records showing that it was in spec when it was calibrated. Only then I start considering moving the time back. I have yet to have an auditor have an issue with that.

If you want to check the machine between calibration cycles, I use gage blocks to check all 3 axis and a couple ring gages. Southern Gage also makes an artifact for CMM checking that some people have recommended:
http://www.gsgage.com/content/our_products/surveillance_masters.asp
 

cbearden

Involved In Discussions
#5
There is nothing wrong with having an 18 month Calibration Interval....as long as the CMM is giving you accurate results and you can correltate those results using another method, it's your choice on the Calibration Interval.
 
D

DCORCOR1

#6
is there any off the shelf calibration kit for cmm's where I can use it myself rather than getting manufacture in, for cost reduction puposes, our cmm's are very stable but to push out the vendor calibrations I would some fixture that I could use in the interem.
 
C

Citizen Kane

#7
Hi !

You should include your calibration on your maintenance plan. Also, you should perform some regular checks (these are also scheduled) so that you can see in time if you are out of specifications and need a calibration. This is the system that we have installed here in our plant.
 
#8
is there any off the shelf calibration kit for cmm's where I can use it myself rather than getting manufacture in, for cost reduction purposes, our cmm's are very stable but to push out the vendor calibrations I would some fixture that I could use in the interim.
There are a couple of products made to do quick checks of accuracy. Renishaw has/had a 'Machine Checking Gauge" - it looks like it's a 'QC-10' now.

There is also an ANSI B89 type gauge available for such a check, too. http://cmm.helmel.net/tag/b89-ball-bar-kit/
 
K

Krink

#9
We have very large CMM's at my company and I am charged approx 1K to have them certified to MY spec requirments. If I find an out of spec condition, I then pay 5 to 7 times that because the software to map the zone is proriatory to the CMM manufacturer. These machines are in a clean room and on very good foundations and unless there is a collision, there is very little to cause them to go out. After seeing little change, I have implemented our own calibration yearly and pay the 1K every two years.
 
M

Mexicanquality

#10
Not, the norm doesn´t mentioned nothing about it, even the CMM´ supplier doesn´t know the real period because depends of the use, conditions, etc.
Us ans artifact (certificated) is the best option to know if your machine is measuring good (just be sure that the artifact covers the 3 axis and lenghts neccesaries according you CMM size).
If you have this Chart is a kind of stability studie.

Regards
 
Thread starter Similar threads Forum Replies Date
S Calibration Frequency for Slip Gauge Kit used for CMM Calibration? General Measurement Device and Calibration Topics 0
Z CMM (Coordinate Measuring Machine) Calibration Interval (Frequency) ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 1
R CMM Calibration Frequency - Bendix manual Coordinate Measuring Machine Calibration Frequency (Interval) 5
L CMM - Calibration Frequency and Variation Calibration Frequency (Interval) 3
Ajit Basrur Reduction of calibration frequency for CMM (coordinate measuring machine) General Measurement Device and Calibration Topics 9
K Calibration Frequency of a CMM Machine (Coordinate Measuring Machine) Calibration Frequency (Interval) 1
B Gage calibration frequency, ISO and IATF - What are the requirements Calibration Frequency (Interval) 3
L Calibration Frequency for Surftest SJ-400 General Measurement Device and Calibration Topics 0
D Determining Calibration Frequency schedule for items used in production Manufacturing and Related Processes 2
J 95% reliability for calibration frequency Calibration Frequency (Interval) 7
G Sequence and Frequency of Calibration for Thread Gauges General Measurement Device and Calibration Topics 2
Marc Calibration Frequency (Interval) Discussions Sub-Forum General Measurement Device and Calibration Topics 0
J Digital Scale Re-Calibration Interval Frequency General Measurement Device and Calibration Topics 10
M A Guide or Standard for Calibration Interval (Frequency) Calibration Frequency (Interval) 2
smryan Weight Calibration Standards - External Calibration Frequency General Measurement Device and Calibration Topics 11
G UID Compliance Verifier Calibration Test Card Calibration Frequency General Measurement Device and Calibration Topics 3
Q Can we go by different Calibration Frequency vs. What's on the Certificate ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 6
K Pin Gage Use vs. Calibration Frequency Calibration Frequency (Interval) 13
S Gage Calibration Requirement and Frequency/Extended Frequency ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 3
drgnrider Calibration Schedule (Frequency) not properly reflected on Laboratory Paperwork Calibration Frequency (Interval) 7
Y Calibration Frequency Requirements of Liquid in Glass Thermometer General Measurement Device and Calibration Topics 2
D Calibration Frequency of Thread Gages use for Aluminium and Stainless Steel Products Calibration Frequency (Interval) 6
G Dial Indicator Calibration Frequency - ASME/ANSI B89.1.10M-1987 Calibration Frequency (Interval) 4
G Usage and Calibration History for Calibration Frequency AS9100, IAQG, NADCAP and Aerospace related Standards and Requirements 4
S Calibration Frequency for a Measurement Device: Vibration Meter Calibration Frequency (Interval) 4
M Thread Plug Gage - Calibration Frequency ISO 13485:2016 - Medical Device Quality Management Systems 1
A How Companies Coordinate their Calibration Frequency General Measurement Device and Calibration Topics 3
B Definition of Calibration Frequency - Dispute during Audit ISO 9000, ISO 9001, and ISO 9004 Quality Management Systems Standards 9
K Determination of Calibration Frequency by an Outside Laboratory Calibration Frequency (Interval) 5
E Calibration Frequency of Reference Magnets for Gauss Meter Calibration General Measurement Device and Calibration Topics 5
V Gage Block Calibration Frequency Requirements Calibration Frequency (Interval) 20
MarilynJ6354 Torque Wrench Calibration Frequency (Calibration Interval) Calibration Frequency (Interval) 38
AnaMariaVR2 Plate washer maintenance & calibration frequency? US Food and Drug Administration (FDA) 3
C Extending the Calibration Frequency of a Measurement Device Calibration Frequency (Interval) 17
T Calibration Frequency - Evidential Breath Analizer Calibration Frequency (Interval) 25
C Calibration Frequency and training a new calibration coordinator IATF 16949 - Automotive Quality Systems Standard 5
J In car position check fixtures - Calibration frequency and How to Calibrate them IATF 16949 - Automotive Quality Systems Standard 8
D Minimum Frequency for Thermometer Calibration Food Safety - ISO 22000, HACCP (21 CFR 120) 5
R Calibration of a frequency measurement device/frequency source General Measurement Device and Calibration Topics 2
R New Equipment Calibration and determination of Calibration Frequency General Measurement Device and Calibration Topics 8
M What is the recommended calibration frequency for gage blocks? Calibration Frequency (Interval) 2
M Extending Surface Plate Calibration Frequency General Measurement Device and Calibration Topics 3
H Determining Measurement (Measuring) Device Calibration Frequency Calibration Frequency (Interval) 36
K Calibration Frequency for Leica Laser Tracker Calibration Frequency (Interval) 4
R Microwave Time and Frequency Calibration Measurement Uncertainty (MU) 11
T Basis for Calibration Method and Intervals (Frequency) - FAA approved repair station Federal Aviation Administration (FAA) Standards and Requirements 10
F Calibration Intervals (Frequency) for Stereoscopes, Microscopes, etc. Inspection, Prints (Drawings), Testing, Sampling and Related Topics 2
H Determining Calibration Frequency for Ammeters & Voltmeters used on the line Calibration Frequency (Interval) 7
N Calibration Frequency of Measurement and Test Devices Calibration Frequency (Interval) 26
R Calibration Intervals (Frequency) derived from Variables Data Calibration Frequency (Interval) 30

Similar threads

Top Bottom