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Can anyone provide ASTM E1007-90? For measuring concrete thermal property ASTM E1007 or ISO 10534-2-90 can be used?
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Amit Shiuly Please check it in the attached files.
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Hi, I want to do tensile analysis for my vulcanized rubber sample following the ASTM 412/ ISO 37. My starting rubber was ENR latex. As stated in that standard type 1, the standard thickness should be 2.0mm plus minus 0.2 mm. However, when I vulcanize the prepared sample around that thickness in drying oven, it resulted bubbles formed on the surface of the rubber film. this problem restricted me to proceed with tensile analysis as the sample will easily rupture for tensile and give me inaccuracy result. the problem is lessen when I reduce the thickness of the film to around 1.5mm. I am thinking to reduce the thickness, however, it will not following the standard thickness. Is it possible for me to do that with the above limitation? What is the condition/pre-requirement to reduce the thickness not following the standard (just for thickness part, other following the standard). I found some of papers that did tensile testing on vulcanized rubber sometimes not followed the standard thickness, but I do not know the reason behind that allowing to reduce thickness.
Any suggestion for me to solve this problem. Im really appreciate. Thank you.
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Dear Anis Abdul Ghani,
You can report the tensile result and mention the thickness of the samples with the tolerance. It is so important that the samples are free of any defects as Dr. Serge has mentioned.
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I need to abbreviate journal title (in reference section) as per ISO 4 (Rules for the abbreviation of title words and titles of publications). Can anybody share ISO 4, please?
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Have a look at https://www.issn.org/services/online-services/access-to-the-ltwa/#lettres In the enclosed file you find the latest released ISO 4.
Best regards.
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Hi there,
There is an internal gene in plant to diagnose of which ISO has a protocol, primer, and a temperature program. I have ordered this universal primer twice and checked annealing from 52-59. I just saw the same size non-specific band( far larger than the target) in both PC and NTC in each temperature 54-59. The results remain the same whatever I have changed, such as primer or DNA concentration, or master mix.
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If the unwanted band is very much larger than the wanted one you could try reducing the annealing time and extension time to just a few seconds each to give the small band a better chance. Taq extends at more than 100bases/second so you do not need much extension time. Try also a DMSO gradient. Run tubes at your current conditions but tubes contain 0%, 1%.2%......8% final concentration of dmso and usually non specific bands will disappear as the dmso gets more concentrated and then above 10% dmso the reaction starts to fail
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I am working on a security measurement framework for open source ERP software. I would like to get expert opinion on the factors that affect security attributes as defined in ISO/IEC 25010
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Your question focused on the CIA and AAA as commonly called in the cybersecurity world. In your question, you are more concerned with security attributes that are related to ISO/IEC 25010. That implies that you are concerned with:
(1) quality in use model and
(2) product quality model.
In addition to contribution by Ziaur Rahman
William M. Hayden Jr.
and
Krunalkumar Shah
, I suggest you review the briefs below.
  • identify software and system requirements;
  • validate the comprehensiveness of a requirements definition;
  • identify software and system design objectives;
  • identify software and system testing objectives;
  • identify quality control criteria as part of quality assurance;
  • identify acceptance criteria for a software product and/or software-intensive computer system;
  • establish measures of quality characteristics in support of these activities. (taken from https://www.iso.org/standard/35733.html)
If you are considering high availability, one of the best means of attaining close to 99.9% availability is IaaS with the infrastructure provided by CSP with SOC2 type 2 audit report. By my definition and suggestion, I am vendor neutral. Ask for SOC2 Type 2 report from any cloud service provider before using such infrastructure to guarantee high up time. Since you have identified the open source ERP, proceed to development environment or sandbox to first deploy, test and then move to production. However, ensure that the Open Source ERP has wide community support.
You can support the integrity of both the system and data with the implementation of TLS for data in transit and AES for data at rest in the cloud. If you have the fund and you plan to work remotely in your organization, you may also invest in thin-client. This will ensure both integrity and confidentiality of your data and systems.
For AAA, you must have the I - Identification system for all users. Try to use the same user identification nomenclature to simplify identity management. Perhaps, if you have a system that uses kerberos, you may plan to have a federated identification in the future or even use a SAML to provide a seamless integration of the cloud and on premise infrastructure through a TLS connection. Make your A-Authentication follow your organization's policy on password. These days, NIST recommend the use of long paraphrase instead of complex password while you may not need to set the password to expire at any date. For A-Authorization, you should adopt the least privilege and need to know principle for all users. Try to ensure a proper documentation of all authorization of access using two-man authorization principle (at least, two persons must authorize the assignment of access to any user). Finally you must enable logging of user activities, especially privilege users to guarantee A-Accountability.
For non-repudiation, the use of both symmetric and asymmetric encryption must be enforced for all users and the entire system. That means use TLS (https) for your data in motion through the browser and AES for data at rest (in database). You can always use hash to ensure for each backup to ensure the integrity of your backups.
All the above needs management full support. Try to implement a good Change Management system so that someone will not mess up your work. Users must be trained and evaluated to ensure a good success of your project.
I hope the explanation above will be helpful. You may reach me for further clarification on my email (in my profile). Thanks.
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In an attempt to modernise the security control framework, the new version of ISO 27002:2022 is out. I wondered if anyone had looked remarkably at the latest version to determine the level of modernising that might have been in implementation.
I’m interested in views of the new format and structure, whether it achieves its aims of modernising the security control framework to meet the challenges of modern architectures?
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What is the current version of ISO 27002?
What's new in ISO 27002:2022? ISO 27002:2013 contained 114 controls, divided over 14 chapters. This has been restructured, the 2022 version contains 93 controls, divided over 4 chapters: 5.
How many controls are there in ISO 27002?
Published in October 2013, the latest version of ISO 27002 covers 14 security controls areas (numbered from 5 to 18), with implementation guidance and requirements for each specific control.
How does the ISO IEC 27001 differ from ISO IEC 27002?
The key difference between ISO 27001 and ISO 27002 is that ISO 27002 is designed to use as a reference for selecting security controls within the process of implementing an Information Security Management System (ISMS) based on ISO 27001. Organisations can achieve certification to ISO 27001 but not ISO 27002.
What is the purpose of ISO 27002?
The ISO 27002 standard is a collection of information security guidelines that are intended to help an organization implement, maintain, and improve its information security management.
What is the ISO 27002 standard?
What is ISO 27002? ISO 27002 is a supplementary standard that focuses on the information security controls that organizations might choose to implement. These controls are listed in Annex A of ISO 27001, which is what you'll often see information security experts refer to when discussing information security controls.
ISO 27001 vs. ISO 27002: What’s the difference?
https://www.itgovernance.co.uk/blo g/understanding-the-differences-between-iso-27001-and-iso-27002
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According to ISO 11930:2019(en) Cosmetics — Microbiology — Evaluation of the antimicrobial protection of a cosmetic product, the process to obtain a work culture is as follows: Attain a stock culture by unfreezing previously cryopreserved microorganisms; From this stock culture perform a subculture and incubate 18 to 24h; From the fist, subculture perform a second subculture and incubate.
The cryopreserved microorganisms are bought and therefore assumed to be pure cultures, so one would assume the sequential cultures aren't to isolate the pretended microorganism. Why according to ISO 11930:2019(en) can we only use the second and third cultures?
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It has nothing to do with the purity of the inoculum but rather with the fact that, after cryopreservation, some bacterial strains may exhibit a prolonged lag phase so with only one subculture can happen that they are not in "perfect" conditions. With a second subculture you make sure the strains are metabolically recovered from the cold temperatures. Hope that helps!
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what is the form of citation of reference method ISO, AFRNOR in journal bibliography?
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I suppose the form should have the following elements:
Author/s of an article. Article title. Journal title. Subtitle Place: Publisher, date, Volume number, pages. Notes
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I need method for broth micro dilution assay for AST testing (ISO 20776-1:2019) It would be great if anyone could share a PDF Thanks :) ?
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See the attachment. David Booth
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Hi,
I have tried several times to run WB with my protein lysate from heart tissue. My lysis buffer is 1XRIPA +1X of proteinase inhibitor and phosphatase inhibitor cocktails and the samples are always on ice. My samples buffer + adding reduced reagent as DTT before loading on the SDS 4-20% gel. I tried to detect my phosphorylated protein as phospho_phospholamban (Ser16), I got signals but the problem is I got also strong signal in my control samples (from sham mouse ) without any stimulation like ISO or other reagents. Sometime my control samples showing as strong signal as my stimulated samples therefore it is very hard to say the stimulated samples is actually stimulated or not. So I just wonder that do you have any idea why my control samples gave strong signal (band) even I added phosphatase inhibitor? Is it because low amount I did add ? Thanks for help!!
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Hello,
Phosphatase inhibitors are added to the lysis buffer to prevent dephosphorylation of the phosphorylated proteins. This should not be the cause of the problem.
There are two possibilities which I can suggest.
1. How sure are you that the controls you have used are really good controls.
2. The primary antibody may not be specific for phospho-proteins. You may have to change your primary antibody.
Another point I need to add is whenever you have to detect phosphorylated proteins do not use non-fat dry milk for blocking because casein present in non-fat dry milk is a phospho protein which could cause non-specific binding resulting in background bands. Instead, you can use
3-4% BSA for blocking.
I hope this helps.
Good Luck.
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I am reading ISO 19036 at point 7.2, which addresses counting uncertainty. For the calculation of the distributional standard uncertainty of a Poisson distribution is indicated the formula:
u_poisson = (1 / Ln10) / sqrt (EC),
being EC the number of counting colonies.
On the other hand, the variance of a Poisson distribution is equal to its mean value, therefore, the standard deviation should be its square root.
I understand that the units above correspond to a log10, but still the basic calculations give me very different values.
Can someone explain to me where the equation of the iso 19036 for u_poisson comes from?
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Well poisson distributions are used to model counts which is what you have here. See the attached screenshot for more details.
Best wishes, David Booth
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I am trying to build ESP plot using fchk file and I get the following message 
Surface build !
Reading Cube File 
Writing Grid point
Line Number 64601
No data to plot.
Iso value may be out of Range.
Does anyone have any idea what this means and how to solve it?
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did u solve this error??
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Does anyone have an article in which the latest ISO guide 35 version has been used and can you send it to me? I need to review that rule urgently.
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Dear Maria,
You are Welcome.
Regards
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We have rated the lignin contents in the lignocellulosic materials using Kappa number (mL volume of 0.02 N potassium permanganate solution consumed per 1 gram dry mass of lignocellulosic materials under the specified conditions) according to ISO 302-2015. Could you recommend any other methods which perform more effectively or easily?
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Interested
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I am trying to develop a simple method for amateurs to make relative measurements of noise in digital cameras. One method involves taking multiple images of a standard grey card, bringing the images into Photoshop as a stack and then using Photoshop's standard deviation function. As expected, the mean value of the standard deviation over the image increases with ISO setting. However, there is also a distinct spatial pattern to the standard deviation visible at all ISO settings. (See example image attached.) Changing lenses or just adjusting focus changes the pattern. No corresponding pattern is observed when calcuting mean or median.
My experiments were conducted on a copy stand using a Canon 5D Mark II DSLR and a Kodak grey card. The attached image is the pattern when the card is in focus. The contrast has been enhanced to make the pattern clearer. The standard deviation was calculate from 10 images taken in rapid sequence under close to identical conditions.
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Douglas Stinson I do not know. A file in photoshop, and the screen is periodic. Taking a picture of a screen may give moire patterns. I guess that would be the mean, just one pic. I havent experimented with picture averaging and optics in practice. But use statistics a lot on data in general.
I do have an optics course from the study time and worked with a large laser for TV holography recordings. The small lenses we used would always give fringe patterns doe to imperfections in the glass or small particles. The lenses were used to spread the laser beam over an object for study. It would not look as periodic as your pic, but still there would be irregularl cocentric fringes with shifting maxima and minima.
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Hi Everyone,
How can I download certain ISO documents (full version) for free? It would be helpful for my research.
I am after ISO 14040, 14044, 14067, and ISO 13065.
Thanks
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Hi Sajna,
These documents are usually not for free. I suggest talking to a libriarian at your university to check whether you have a subscription that allows you to access ISO standards. If these documents are important for your research, you might also want to consider buying them. The costs can often be covered by your institution or a research grant.
Hope this is helpful!
Take care.
Jesko
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I can't quite catch the meaning of the definition of "single stiffness ". In the case of helical gears, which plane does c' defined in, the normal plane or the transverse plane? It seems to be in the transverse plane from the definition.
In the equation (80), c’=cth’CMCRCBcosβ. Why the fact for helical gears is cosβ?
cth’ for helical gears is calculated in the normal section (per unit contact line). Should it be cth’* cosβ/ cosβ= cth’ in the transverse section (per unit face width)?
Thank you for your time.
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What are the values of CM, CR, CB in this equation for spur gear?
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Dear Colleague,
Part of my Ph.D. thesis needs to be completed questionnaire, which, unfortunately, due to Covid 19, we cannot attend the company under review. For this reason, I request supply chain experts who wish to complete the questionnaire to notify me, that I will email the questionnaire to them. It would be your generosity to respond to the questionnaires and also distribute them among your colleagues, students, and networks.
Thank you in advance for your help and cooperation.
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Hello,
Recently I've been looking for a strict guidelines considering the stability of chromatographic mobile phases. Found none, only some hints, good practice clues or SOP's from different labs all based on "scientific judgment". It is great for RnD, but not enough for GMP/ISO.
I bet many people here already dig this topic inside out. Can anyone direct me towards clear guidelines or possibly share the methods of testing the stability of the different mobile phases (besides pH checking) that she/he uses?
Any "hard facts" would be greatly appreciated especially for those working with routine and GMP analyses, and before audit :)
Cheers!
Natalia
📷
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Best wishes on this project but it is dependent on all the variables in an LC column that affect the material passing through the column. Best wishes, David Booth
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I am also looking for ISO 14000 series of standards. If you have others as well, it will be more than enough.
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So far as I know, it is a paid service through recognized auditors who continue auditing periodically after certification. This list of recognized auditors would be easily available, please.
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I am trying to simulate Random Road Profile Grade-C as per ISO 8608 using Shaping Filter Method equation (Eq. 15 of attachement).
The value of "Alpha" is taken as 0.127 from Table.3 shown in attached image, "Velocity of vehicle, v = 20 m/s".
But as per Simulink Model (Fig.3) "Random Number Block" is used for generating "Zero Mean Gaussian White Noise". The Random Number block used for this requires 4 inputs i.e. "Mean", "Variance", "Initial SEED" and "Sample Time".
The "Mean" is taken as "0" , "Sample Time" is taken as Simulation fixed step time i.e. 0.001.
Now I have no clue what value will be used for "Variance" and "SEED"? for this white noise.
Will the "variance" be Square of "Sigma" from Table 3? or some thing else?
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Dear Mr Pankaj Sharma
I would suggest not to use that block anymore as it's obsolete nowadays. You can better follow another approach. Which is mentioned below.
Step 1 - Insert a MATLAB Function block into the Simulink workspace.
Step 2 - Design a White Gaussian Noise following the algorithm
  • signal=10 * sin(t) % your signal
  • ecart_type=abs(signal * .05) % variable std 5%
  • noise= mean + ecart_type .* randn(1, numel(signal));
into that block
Step 3 - Use that block as your Noise Generator.
The block 'AWGN' can not be found in the Matlab version after I think 2015 as it was removed for such complication, which you are facing presently. I hope I could help you. Good Luck!
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Hello, I am accrediting the acute toxicity assay with Daphnia magna ISO 6341; may you suggest how to express the measurement uncertainty with the confidence interval?
Thanks in advance.
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From your question, I am assuming that you have already calculated Uncertainty, if you have already calculated the measurement of uncertainty; add uncertainty column with heading Uncertainty @ 95% CI (Confidence Interval) in report and just mention the calculated uncertainty in front of relevant test results.
Also add disclaimer in footer of report that Lab is reporting results @ K=2, 95% Confidence Interval.
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ISO/TS 16976-3:2019 Respiratory protective devices — Human factors — Part 3: Physiological responses and limitations of oxygen and limitations of carbon dioxide in the breathing environment
Does anyone have this document to consult it?
I need it for a short work.
Thanks you
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You can access it here as a free download: http://www.cn-csas.com/media/2020041611502893.pdf
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Hi,
does anybody know which are the differences between standard ISO 28540 and DIN 38407-39 for PAHs analysis in water samples? Eventually, is it available DIN 38407-39 in english?
Thanks
Martina
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I am searching for the same answer. Could you find anything?
Can I use ISO 28540:2011 as an equivalent English version of DIN 38407-39?
Kind regards
Gentrit
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Dear all,
I would like to conduct scratch and linear reciprocating tribo-test on my magensium alloy, which has a plasma electrolytic oxide (PEO) layer of about 20 um and 10 - 20 um of Parylene coating on top of it. So it is a double layer system.
I made a research on ASTM standard tests for scratch and linear reciprocating tribo-test and I found ASTM C1624 - 05 for the first and ASTM G133 - 05 for the second. However, I am not sure if these standards are applicable to a double layer coatings as in my system.
Are there some specific standard tribological tests for multilayer coatings?
Thanks!
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ASTM C1624 test standard is the most used standard for this. You can read the article below, this may help you and clear your doubts
An ASTM Standard for Quantitative Scratch Adhesion Testing of Thin, Hard Ceramic Coatings
Stephen T. Gonczy Nicholas RandallFirst published: 05 October 2005 https://doi.org/10.1111/j.1744-7402.2005.02043.x
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Suggestions and recommendations welcome. Any usage/protocol experience would also be helpful/appreciated.
Cheers
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Not a specific recommendation, but Abbexa, Biomatik, and MyBiosource all have rabbit anti-BFP pAbs that they indicate are suitable for IHC.
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Hi,
I warping my plates with paper, later put them in the autoclave (use wet sterilization cycle) but still some plates are get wet after ends the cycle. How to get dry the petri dishes? and if i use a oven, exist a normalized method (OMS, NHS UK, ISO) for drying the plates with a laboratory glassware oven?
Regards
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Drying for 24 h will be find. Please after drying and just before using, you can place them in a UV hood for sometime (10 min) prior to opening.
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I am Currently Working on Measuring Various Mechanical Properties of Metalic Materials using Universal Testing Machine (UTM) at Various Temperatures. I know that for Testing at Ambient Conditions, ASTM E8/E8M is followed.
By Literature Review, I have Identified the Specimen Dimensions for My Experiments.
Due to Lack of Adequate Experimental Data, I am Unable to Identify the Specimen Dimensions with respect to ASTM E21 and ISO 15579 for Testing at Elevated and Low Temperatures respectively.
Since, These Standards are Quite Costly to be Purchased Individually, Should I take the Specimen Dimensions at Room Temperature for Experiments at Low and High Temperatures ?
Is there a Major Difference in the Dimensions presented by these Standards or Can I Complete the Analysis using My Assumptions ?
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hi, this depend on type of equipment
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I am a PhD student, and the doctor asked to do a lecture on ISO 9000, 14000, 17000, 118000,22000 18091,27000 and I would like to prepare the lecture. Is it possible to help me with these specifications with thanks to you
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ISO 9000: It is the quality management standard, and comprises of some of ISO’s best-known standards. It focuses on quality standards that guide companies and equip them with the necessary tools to continuously improve quality and ensure that customer demands are always met
ISO 14000: This is a family of standards that provides the necessary tools and guidelines for companies to manage their environmental responsibilities
ISO 17000: International Standards relating to conformity assessment activities such as testing, inspection and various forms of certification
ISO 28000: Specifications for Security Management Systems for the Supply Chain
ISO 22000: This standard facilitates the development and implementation of a food safety management system
ISO 18091: Quality management systems — Guidelines for the application of ISO 9001 in local government
ISO 27000: These standards help organisations manage the security of assets such as intellectual property, financial and employee data, and information held in trust for third parties. It is basically the standards for Information Security Management Systems.
For more information, check: https://www.iso.org/news/ref2378.html
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Colleagues, I am currently working on a project in my Master's Degree in Documentation that deals with evaluation indicators of digital libraries
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In addition to this particular ISO standard: most are available at the ISO.org webshop. Or, alternatively, through a national member body you can become a member and participate in standards creation and maintenance and that gives you access too.
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ISO 7218 states that in cases where the number of colonies obtained in the 1st dilution is 0, the result must be calculated and presented as <1 / V * d (eg: <1/1 * 10^ -1; <10 cfu / g). ISO 19036: 2019 states that in these cases the LOQ should be calculated as <1 / 1.1 * d (eg: <1 / 1.1 * 10^-1; <9.1 cfu / g). What is your opinion on the matter?
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In general, you need to precisely analyse the scope of each standard. From your calculation review I cannot determine what is the "colony" about, and what exactly is the dilution process and substance.
Further, what is the relation between the two ISO standards, and why do you not list the year of publication of 7218?
And, is there external evidence or knowledge about what is in the colony and what diagnostic procedure is evidence based? Again, I am not familiar with these standards and the content matter. It is a general knowledge on standards and scientific approach to finding evidence that I ask you these questions.
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Research suggested that standards will make a notable contribution to GDP growth. However, productivity growth in the construction sector is among the lowest of all industries over the past years, according to McKinsey. Shall standardization bodies (e.g., ISO, IEC, ITU, CEN) start standards initiatives (TC, WG, etc.) specifically for construction robots and automation?
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I agree with what has been said, and standardization in general obviously has a number of advantages.
Regarding the automation-robotization besides the construction standards of such complex elements, I will bring to your attention the standardization in industrial communications (see Industy 4/0). Without standards the development couldn' possibile.
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I am currently looking for ideas on how to go about this.
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Go to:
Bill
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I am looking for data which consists of firm name and their adoption date of ISO 9000 and if they are exporting firms or not.
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Hi, everyone.
Our lab is going to use ISO 12966-2 and 12966-4 and there is one moment in sample preparation (rapid transmethylation method under alkali-catalysed conditions) that I can't understand. It is about the addition of saturated sodium chloride solution after transmethylation reaction. Maybe I'm not so good in chemistry to understand the purpose of this action. So, can anyone please help me to get it?
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In the same way of Moosa Faniband, when you add NaCl, to aqueous phase become more polar, changing the partition coefficient. So, the analyte will be push to organic phase, increasing concentration in isooctane.
Hope helps
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Hello,
we are conducting cytotoxicity tests since over an year and aren't able to get a stable test. We are no in the validation phase but there are some effects we can't explain. Here is an overview how we conduct the test in compliance with DIN EN ISO 10993-5:
- Seeding 1 x 10^4 cells in a 96-well plate (except the outer wells) --> incubate for 24 h
- Adding medical device extracts (100%, 50%, 10%, 1%) and controls:
- positive control: 1% Triton X (P)
- negative control: cell media (N)
- blank (B): media that was shaken with cell culture media for 24 h at 37 °C in the same kind of container like the medical device was shaken (in compliance with DIN EN ISO 10993-12)
- Incubation for 24 h
- Discard the media and add 50 µl MTT solution (10 mg/ml) --> incubate for 2 h
- Discard and add 100 µl Isopropanol --> incubate for 30 min
- Read out with microplate reader
See the pictures below...the cells are all the time okay until extracts and controlls are added...So something must happen at this point. Sometimes the negative control dies randomly. Sometimes the blank dies. Sometimes only one extract dilution which makes no sense. Does anyone have an idea?
Many thanks!
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I have had enough failures in doing cytotoxicity and viability assays to be able to share some insights.
1. I don't know your cell line but if the cells are average sized and multiply properly, I would start by seeding a lower cell density around 1-2k cells per well. Lower cells density allows us to see a better resolution of effect by the agent/ controls on cell survival/viability/proliferation.
2. The most common but less discussed issue is changing media. Everyone you change media due to pipetting a large chunk of cells may be pipetted out. Resulting in negative results in one of the agents or positive controls. Many a times when cell density is very high a large chunk of cells gets uprooted out easily. So without touching the bottom the pipette needs to be touching the edge to gently remove media. This should be practiced throughout all media changes.
3. Another alternative is to avoid change of media as much as possible. One way is to directly put the MTT in the media. Although media has a colour due to phenol red it may affect reading but the media is present in all wells so it should not be an issue. Although some people use a media without phenol red to avoid this issue.
Hope this helps.
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There are various software quality models viz. McCall’s, Boehm’s, Dromey's, FURPS, ISO 9126. What are the problems using these standards in real practice? How these standards differ from each other? Is there any global or widely acceptable software quality standard? Please provide your valuable suggestions?
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Industry would usually go for compliance of statute. In case anybody is really interested on a protocol, he would like to follow international best practices. Some of them will listen to what their consultants say.
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Medical guidelines, prescribing how to diagnose a disease and how to treat this can be very helpful. On the other side, if a physician is obliged to follow this to the letter, it can be a burden, limiting common sense.
The same holds for ISO15189, partly helpful for improving the quality of their output and partly a burden forcing clinical laboratories into a lot of work.
What is your opinion on the balance between benefit and burden?
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It is depends upon the application with dedication!
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Hello,
I would need to understand how equation 4 of the ISO 748:207 "Hydrometry — Measurement of liquid flow in open channels using current-meters or floats" is obtained or from which source it is derived from. The equation tries to parameterize the m (exponent of the power law equation) as:
m=Cver/√g∙((2√g)/(√g+C )+0.3)
Where
g is the acceleration due to gravity (m/s2);
Cver is Chezy's coefficient on a vertical (m0,5/s).
(you can see the attachment with the ISO equation and the attachment with the whole ISO document).
Any help would be greatly appreciated.
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The following paper can be illustrative and helpful:
Although the author did not arrive at the same expression for "m", he gave a holistic insight into the issues in question and therefore, it could be taken as a starting point for your derivation.
All the best,
Alonso
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I'm researching the use of PMI data in a MBD model for use in manufacturing.
I wasn't able to find any information about how threads (e.g. M10) and the ISO system of Limits and Fits (e.g. 20 H5) are handled within STEP AP242. In most CAD systems these are handled very well within the 3D annotations of the native model but once you export them to STEP AP242 you lose a lot of information. This limits the automated use of PMI data when exchanging this data. So I'm wondering whether I'm missing something or whether this is lacking within the STEP AP242 definition or the way it is implemented.
Any help to help me understand this is very much appreciated.
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Thank you, I'll check it out.
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What do you think about the importance and value-add of The ISO 14040 series standards, Life Cycle Assessment? In general and especially in petrochemical industry.
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Thanks for all.
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I just got a new PC which I started using and I'm having trouble with kali linux VM. Now this is weird because I have experience with kali before and I am using this PC to run other VMs. I got an an ISO fitted specifically for virtualbox (32 bit kali) which I found here:
Whenever I try running it on VirtualBox i get this error: "VT-x is disabled in the BIOS for all CPU modes (VERR_VMX_MSR_ALL_VMX_DISABLED)."
I went into my BIOS settings (on ASUS motherboard, don't know the exact model but i could look it up real quick and provide it if necessary). I went under Advanced -> CPU Configurations and found Intel VT-x technology. It was greyed out and I couldn't change it but it said it was "Supported" already
I then went under Advanced Settings->System Agent Configuration Settings, and enabled the VT-d function.
Despite both apparently being enabled I am still getting the same problem and it is persisting.
My PC has no problem running a VirtualBox session with Ubuntu Server ISO so it's not an issue with virtualbox itself. This also seems to indicate VT-x is already enabled to begin with as virtualization tech is clearly supported on the PC.
thoughts?
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just to add my case because google bring me to here.
My solution was to upgrade vBox, may be kali ova was created with a newer version than the one I had
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The ISO 22301, Societal security — Business continuity management systems — Requirements, if there is some organizations have its compliance certificate, how can this be a value-added to those organizations.
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Of course, Business Continuity ISO 22301 can add value in your system and provide confidence that operational activity of the company is continue without any threats if it is truly implemented especially in current condition COVID 19 pandemic.
Companies can use it for marketing tool. Recommended for IT related companies.
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The ISO 30401, Knowledge management systems —Requirements, if there is some organizations have its compliance certificate, how can this be a value-added to those organizations.
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Yes, it is certainly helpful provided the organisation adopt in true sense
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Could you please share your knowledge/experience about the relationship between STEP AP209 (ISO 10303: AP209) and CGNS:
- Does AP209 covers/supports CGNS 100%?
- Where can I read more about the relationship between AP209 and CGNS?
The AP209 web page (http://www.ap209.org/related-standards) quotes this only:
AP209 relates with the following standards:
CGNS (CFD General Notation System) is integrated with the STEP integrated resources
Engineering disciplines covered today by AP209 ed2 are:
Computational Fluid Dynamics (CFD), mainly based upon the CGNS standard;
Thanking you.
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In estimating the texture distribution of asphalt mixtures, i have managed to use the discrete fourier transform on my idealized surface profile and obtained my spectral power density.
However the process of Transforming constant bandwidth spectral data to constant-percentage
bandwidth spectral data has proved challenging i would appreciate assistance in understanding and progressing from my current stage.
I have attached the excel sheet and an image of the formulas from ISO 13473-4
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the formula sheet
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I am hoping to perform a simple 20 minute eeg read on subjects and convert that raw data to a metric to show which frequency each subject spends most time generating. Does anyone know of an app or software that does that very simply? I’m totally intimidated my matlab :(
thanks for any tips.
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For ISO certificated software one usually has to pay!
Please, don't get intimidated by Matlab (or the free and compatible Octave). Take the time to learn it. A powerful tool; highly recommended.
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Dear RG researchers ,,,
Please for your kind help regarding Six Sigma projects & method approach in the prevention of occupational hazards accidents for fulfillment general known standard like ISO 45001.
I found 2 scientific papers
Six Sigma method approach in the prevention of occupational accidents on the solid waste collector in South Jakarta
Use Six Sigma Approach to Improve Healthcare Workers Safety
Thanks for advance
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Thanks alot doctor Ingo for these projects.
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I want to know the standard procedure. For example, ISO 22196 is one of the standard guideline to test the antimicrobial activity of coatings, but it's on purchase document. Does any one know about it or any other suitable method?
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Dear all, here is the ISO standard norm you are looking for. My Regards
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Hi,
I would like to calibrate the energy scales of our XPS system, and would like to receive recommendations of suppliers that sell highly pure Ag, Au and Cu foils (thickness greater than 20 nm).
I already contacted NPL, and they can send me the supplies, however, I would appreciate to receive other suggestions.
Also, I know that ISO 15472 describes the procedure well, but are there any other procedure from which one can follow?
Thanks in advance.
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Dear Dr. Maria Magro,
I normally used, some yers ago, as XPS standard:
-Ag, foil, 0.1 mm thick, 99.9% -Au, foil, 0.1 mm thick, 99.9% Cu, foil, 0.25 mm thick, 99.98%
all by Aldrich Chemical.
Best regards, Pierluigi Traverso
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Hello,
Currently in my project, I am making a hardware controller which can modify the incoming PWM signal and vary the EV A.C charging. To start of with, does anyone know which exact chapters of IEC 61851 standards to buy ? I find that there are many chapters. Basically this hardware will modify the incoming charging current from EVSE to EV according to our inputs. Any literature/material regarding this will be useful. Thanks
Regards,
Praveen
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Yes
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Medical Laboratories have assessments to ISO 15189 and there is also ISO 17025 for testing and calibration labs. Both involve a quality management professional system, staff competency and a laboratory director, standard operatory procedures, assay validation and verification for the intended purpose, third party internal quality control, external quality assessment and assurance, and so forth.
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Quality assurance (definition from ISO 9000: 2015):
Part of quality management focused on providing confidence that quality requirements will be met.
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Through casual conversation at the Practical Surface Analysis (PSA) meeting this week in Japan, I have become aware that there is still confusion on the availability and accessibility to terms and definitions in surface chemical analysis. While the ASTM E42 vocabulary document, E673, was widely available through most research libraries in the annual volume of ASTM standards, keeping the document consistent with the ISO vocabulary standard for surface chemical analysis, 18115-1, was difficult, particularly since the ISO document was adopting many more terms and growing quickly. It was decided to withdraw the ASTM document and make normative reference to the ISO vocabulary document in ASTM standards.
As part of this change, several people (Don Baer at PNNL and Cedric Powell at NIST in particular) made great effort in getting ISO to agree to make these terms free and readily accessible. They were very successful in getting this cooperation, and now all of the surface analysis vocabulary terms are readily accessible through the IOS Online Browsing Platform (https://www.iso.org/obp/ui). Now there are several sites also hosting links to this, in order to make these terms and definitions accessible. This is a valuable resource, and is freely accessed to check terminology to be used in publications.
This ISO vocabulary document (18115-1) is also being revised, adding new terms and clarifying those that have been found to be lacking information or that are confusing.  Please use this resource, and if you find that there are necessary terms missing , or if there is confusion in any of the existing terms, please contact Dr. Alex Shard at NPL, who is the chair of TC201/SC1 and is currently actively revising this document. There is also a companion document (18115-2) for terms used in scanning probe microscopy, and these are also available through the ISO Online Browsing Platform. 
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Please look at the following below link and the attahed book which may help you in your analysis:
Thanks
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ISO 9227 do not provide any relation to test duration with life
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Dear Dr. Ashwani Upadhyay,
it is very difficult correlating salt spray test hours and real life.
Some references indicate that approximately 100 hours salt spray is similar to one year outdoors based on OEM testing in the US. Similar data are indicated for Europe. That is the closest realtion based on some paper. A 100 hours in the salt spray cabinet could be equivalent to a month exposure in the Panama Canal Zone but you need to know what environment you intend to compare it with. Obviously, 100 hours in the salt spray could also be 15 years in the desert.
Perhaps, it could more reasonable to correlate the behavior of different samples, subjected to a standardized corrosive stress, following one of the different regulations. The next step could be a similar comparison with exposure of the same samples in a real corrosive environment with an environmental monitoring support.
Best regards, Pierluigi Traverso
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are there a Certification Body to "ISO 8: 2019" information and documentation - presentation and identification of periodicals.
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I think that this is not a certifiable standard by Cettification Bodies. It is a kind of guidelines for presentation and identification of periodicals. If a periodical (not newspaper or book) use these guidelines for title information, enumeration, layout and pagination etc, you can say that this publication "takes into consideration the specifications of ISO 8 : 2019" and you also have a contact with a Certification Body to reassure that but not to publish a certification as an accredited body.
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I am working on system dynamics modeling of sustainability of smart cities and I would appreciate if there is anyone who can send me or link me to the documents for these standards? I would also appreciate if you could share with me other related standards that can be freely accessed online. Thank you so much.
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In Germany, standards of the International Standard Organization can be viewed (but not copied!) free of charge in the offices of the German Standards Organization (DIN). These offices are located in all major German cities. Since the Philippine Bureau of Product Standards within the Department of Trade and Industry is a member of ISO , this possibility could also exist for you in Manila. You should check this out.
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Greetings colleagues!
I really hope you could devote some of your time to the following: 
We are now designing a new dental implant (Class III).
During preclinical stage in vitro and in vivo studies were done. We want to verify the implant by designing a clinical trial, but before that all preclinical studies must be done.
What studies must be included in preclinics to measure safety (technical, biocompatibility etc) by ISO standards? As we know ISO-10993(bio) and ISO-14801(tech) are widely used for dental implants.
May be you can suggest a better tactics to check safety of the medical device?
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All FDA does is to allow marketing of food, drugs, devices based upon safety and efficacy. If a device is to be sold in the United States then it must have FDA clearance to do so. FDA does not test, It does not approve, it evaluates data, I guess that's easiest way to say it. So asking what must be done to allow a medical device to be "approved" does not demonstrate a clear understanding of what the FDA does and does not do.
A person who has "invented" a specific device can start using it in the treatment of their patients whenever they want to as long as they are willing to accept the medical legal risk. They can give it to their friends and their friends can use it to treat patients, pay they could give it to their enemies and their enemies could use it to treat patients too but that's old different story. The problem comes when there is a commercial use of a device. For all intents and purposes it has to be across state lines because it fits within this particular state it still comes down to individual states rights and the individual states can make decisions regarding the use or nonuse of a device within their own state.
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I stumbled upon a comment in the new European triaxial testing standard EN ISO 17892-9. In chapter 6.3.3.6 something is written about air bearing and that they could be responsible for decrasing B-values. But what are they for?
The only function I can imagine is that an air bearing avoids the so called stick-slip-effect between the piston and the cell when increasing the axial load.
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You are right. The question is related to standard triaxial tests. The stardard I refered to is a DIN EN ISO standard, not a British standard. Perhaps they were harmonized to each other but I don't know.
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I came accross some studies and the settings of camera differ and also the opinion on it. So when I set the camera in manual mode. I will set shutter speed, ISO, F-number in combination where I will avoid blurry images but still I will get enough light. But do you think if I will use auto-focus setting it can lead to failing the aligning process? In the case of terrestrial photogrammetry the focus can differ greatly but also in some case of UAV photogrammetry. And what if I use auto ISO or shutterspeed. What is your opinion?
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It depends at what height you are flying at but in general for aerial applications (>100 m) the focus should be on infinite and to answer your question you should not have auto-focus. What would the reason of having auto-focus be?
In regard to the other setting, I would rather keep the shutter speed (1/1000 - 1/2000) and aperture fixed and allow for the ISO to vary based on the light conditions, if you have a decent camera it should not cause too much noise even in low light conditions.
Good luck!
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Three years has been gone since ISO 17034: 2016 publication. It's a reasonable time for this standard's users to have a critical practical view on the document advantages and drawbacks.
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I have acceleration vs time data of array 1008*1 for 7 DOF quarter car model in vertical direction.
Simulation is of 10 seconds with step size 0.01, from where I can get matlab code for converting time domain acceleration to frequency weighted acceleration with Butterworth low pass high pass filter as per ISO 2631-1 standard.
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In MATLAB there is a function called "fft" using this you can convert any time domain signal into frequency domain. MATLAB pages for this are below,
example pages,
After that, you can used Butterworth filtering using the function "butter", you can design highpass, lowpass or a bandpass as per your choice or need. Reference page for this are below
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I have simulated a 2DOF Quarter Car Model (Figure Attached) for Step Input of 0.1m. The Weighted RMS acceleration obtained is 4.768 m/s2 . The Acceleration plot on Time Scale is also attached.
I want to obtain plot between Weighted RMS acceleration Real Amplitude (m/s2) vs Frequency (Hz) Plot to compare it with ISO 2631 standards. I tried to obtain it using Magnitude FFT and Vector Scope block but result is showing very high amplitude of 600.
Simulink Model is Also Attached.
How to Obtain the correct plot?
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You can follow this example and plot it in Matlab: https://it.mathworks.com/help/signal/ug/power-spectral-density-estimates-using-fft.html your Fs is 1/sampling frequency of your first order holder, N is the FFT window you're using (128 samples).
Otherwise you need to add a gain block in simulink. Also with a square and a logaritm you can obtain PSD.
Also, I suggest using a fixed step for integration or, if you want to use a variable solver don't forget to narrow tollerances.
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Detergent powder for washing
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Dear Dr. Azad H. Alshatteri,
I think that in the following paper you can find useful suggestions regarding your question:
- Testing Detergents: Establishing Efficient Methods for Formulation, QC and Comparative Assessment
T. Copley
Sofw journal – 04 2107
- Synthetic laundry detergents for household use — Specification (2011)
EAST AFRICAN STANDARD
Best regards, Pierluigi Traverso
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I am trying to determine the exact length of pipe required for my rig design to help effectively mix water droplets with the incoming air flow. For calculation purposes, my water droplet size (MVD) would be around 20 microns and the water content will be around 20g/kg of dry air.
Is there a method of calculation or a standard in BSI/ISO or ASME that deals with this for a straight, cylindrical pipe?
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While I agree with approach mentioned by
Leander Boer
for complete vaporization of liquid droplets along the pipe length, I believe the question concerns about uniform mixing and not complete evaporation. Based on temperature (affecting the time of vaporization), the length of pipe for uniform mixing could be smaller/greater/equal to that required for complete vaporization.
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what if universities in India adopt ISO certification like industries take ISO certificate to show their quality standards.
can this phenomena will be helpful to Indian education system to improve their quality of education?
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The ISO certification (to what standard do you exactly refer?) will approach only a part of the activities across a university - the part of administration. Even an important part the administration, it will not impact with significance the education system
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Greetings,
I am cultivating Daphnia magna for a while now and after a sudden change in the temperature (to 17 degrees during a weekend) they have not been able to recover.
They are still able to breed neonates (some of them), but soon some adults (a lot of them) and even neonates are found dead in the bottom of the beackers.
The daphnids are cultivated in medium ISO and fed with R. subcapitada.
Is there some way to imrpove the culture? Maybe the temperature was not the problem and there is something wrong with my culture (parasites?).
I have been trying for 3 generations now, but it seems that they can't recover. Can someone help?
Regards,
Giuliana.
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If you don't need a specific clone, you could also just extract some from the environment ;-) They live out there in the wild around Europe in ponds and even fountain basins.
Yeah, it's worth keeping a fraction of the population somewhere else (different room, use different jar for their plankton feed etc.). As a backup. Because when you loose a clone some experiments are not possible to repeat.
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Since I need a large number of experiments that are carried out under different climatic conditions, I would like to ask you to help me with this.
I developed a test object with elements of the standard DIN EN ISO ASTM 52902 and additional features. I would send you the STL file of the test object, description of the settings for the experiment and a test report for evaluating, if you contact me.
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Greetings, Markus.
I'm a member of the Design and Material Selection Lab (LdSM) from the Federal University of Rio Grande do Sul, located in Porto Alegre, Brasil. I will check with our Lab Head if it's fine for me to use the lab's resources to help you with this.
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The OECD provides a method to determine WHC. I have found that this is not transferable to "real" soils, and am investigating alternative methods. I would welcome advice about the OECD method or alternative methods from researchers.
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It measure both water holding capacity as well as soil moisture level.
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I'm planning an experiment with ISO 527. I would like to know what the difference are when testing a type A ( with narrow parallel-sided section and tabs) compared to a type B (rectangular shaped) test specimen. I'm also planning to conduct a ISO 178 flexural strength test and therefore it seems appropriate to choose type B, since the dimensions for type B in ISO 527 and ISO 178 are the same.
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Great advice Didier Delincé ! Bridging the gap between academic research and industrial development is something I have been contemplating myself lately. I will study the book and your work further. Thank you!
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Hello Dear concerned polymer scientist or technical fellows, I am looking for a four point probe measurement system to buy, which will be easier to use and test my polymer hydrogel may be in both dry and wet condition. I am not sure if I can use Four point probe to see the surface resistivity of wet hydrogel. So any kind of idea, link, company name or help will be highly and cordially appreciated. I don't have any rough idea about how much the surface resistivity of my hydrogel could be. so possibly looking for some suggestion (the more resistivity range the better). Eagerly waiting for your response. Thanks
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further to the answers of Vincent Immer and Xuhua Wang , I would suggest purchasing a source measure unit (SMU), then purchase a 4 point probing station.
As for the SMU, we use a Keithly 2450. We then connect this to a S-302 manual probing station from Singatone with the SP4 probe head:
I would also suggest looking at MDC's and Everbeing's products:
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ISO 4288 is an old standard defining defaults for profile roughness measurement. Sometimes the defaults can be used. Sometimes they cannot be used. This discussion is not if the defaults make sense or not. It is about how to use the defaults.
Most people know: if the Ra is between 0.1 and 2µm use a cut off 800µm and 4mm length.
But this is not 100% true.
ISO 4288 includes 3 tables. Most of you know the first table gives the relation between Ra and the sampling length which by default is the same as the cut off. But this table is only for aperiodic profiles!
Table 3 of ISO 4288 is for periodic profiles. The table gives the relationship between Rsm (approx. the period of the profile) and the cut off.
So, the definition is that first look if the profile is periodic or not and then look into table 1 or table 3.
Very clear. Nothing new.
No, it is not clear! Even experts are only using table 1 of ISO 4288 and they do not look if the profile is periodic or not. Last week an expert wrote that a sinusoidal roughness artefact (this is periodic) with an Ra of 500nm and a Rsm of 50µm must use 800µm cut off. Table 1 theoretically says 800µm cut off but table 3 says 250µm (table 3 is the right one)!
Periodic profiles are very common. Normally turned surfaces have periodic structures. Very often roughness artefacts have periodic profiles.
Question/Discussion:
  • If ISO 4288 must be used are you checking if the profile is periodic or not?
  • What is a periodic profile? Is it judged visually? Does someone make a FFT and check the components to see if it is periodic?
What is your opinion?
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Note that ISO 4288 is being revised, including the selection of cut-offs. In ISO TC 213, we are developing new standards that harmonise profile and areal surface texture characterisation (ISO 21920 parts 1-3, although they are still only at committee draft stage). Also, note that there are new standards on calibration coming out soon (ISO 25178 parts 600 and 700). Note that type D cannot be used for calibration; only verification. Normally, calibration would be carried out with Type A for height characteristic and C for lateral (due to the transmission argument put forward by Han above). You also need to determine the instrument noise and datum if you want to estimate uncertainty. You can find how to do this in NPL Good Practice Guide no. 37, which is downloadable from the NPL site or my RG profile.
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