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Alliance Calibration

How To Calibrate A Pressure Transducer

Posted by Kevin Radzik on Mar 23, 2017 4:53:44 PM


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Topics: calibration

How to specify analog gages for pressure and temperature?”

Posted by Kevin Radzik on Mar 20, 2017 8:59:33 AM


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What Does It Really Mean When Something Is Marked For Reference Only?

Posted by Kevin Radzik on Mar 8, 2017 10:40:48 AM
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How Do I Start With Risk-Based Thinking?

Posted by Phil Wiseman on Feb 27, 2017 11:17:40 AM

The clearly articulated focus of Risk-Based Thinking in ISO 9001:2015 has some people scratching their heads. What exactly does this mean? Where is the checklist? Where do I start?

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Topics: Standards and Compliance

What Are The Mandatory Documents Required by ISO 9001:2015

Posted by Phil Wiseman on Feb 20, 2017 7:01:00 AM

I recently attended a Quality MeetUp and the discussion centered around ISO 9001:2015. Most had not read 9001:2015 so the discussion focused on what documents are required.

The central theme to ISO 9001:2015 is Risk and this really moves the discussion away from mandatory and required documents to a more holistic strategic approach.

While documents will be necessary and integral to achieve compliance with 9001:2015 the old paradigm of a checklist really is not the most effective approach.

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Topics: Standards and Compliance

This Is The Conversation You Should Be Having With The Calibration Technician!

Posted by Kevin Radzik on Feb 13, 2017 7:47:00 AM
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Topics: calibration

FDA 483 Letters- 2016 review

Posted by Phil Wiseman on Feb 6, 2017 7:05:00 AM

You really don't want to receive this letter from the FDA.

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Topics: calibration

Throw it out, it's cheaper than having it calibrated

Posted by Kevin Radzik on Jan 30, 2017 6:47:00 AM

Throw it out, its cheaper than having it calibrated…

Or is it?

Time and time again, I’ve heard this line. There is a belief that somehow a calibration has an expiration date and is a guarantee that the item will be “in tolerance” until the date on the calibration sticker. Meanwhile someone is using one of your freshly calibrated torque wrenches as a hammer because they can’t remember where their trusty Estwing ran off to. As a third-party calibration lab, we see all sorts of wrong ways to use instruments. Micrometers used as “C” clamps. Weights and masses used as door stops. Length standards used as pry bars. Surface plates used as grinding benches. Thread plugs used as taps. And that’s just a list off the top of my head, I’m sure if I asked a couple of other techs they could give me a dozen more.

So, after all of that you still want to say, its due for calibration. Buy a new one it’s cheaper. If so, then you are missing the whole point of traceability, because it works backwards, not forwards. Calibration today gives us a reasonable assurance that an instrument was good in the past, not necessarily the future. When we calibrate an item and then calibrate the item again at some point in the future, and its meets a tolerance both times, we can make an educated guess that between those two points in time the item was still in tolerance. If we decide to throw it our once the sticker says it is expired, then we call into question every measurement that the instrument was used for since it was calibrated.

As a calibration lab, we are exhaustive in our need to ensure that our instruments have not experienced a breakdown in traceability. This includes making sure they remain in properly trained hands, are transported responsibly, that they aren’t exposed to environments that could cause damage, and being diligent in reporting any anomalies that could point to an erroneous state of operation. We do this because when an item fails to meet specifications, we need to establish when it failed, not just that it failed.

Is it really cheaper?

As a calibration lab, of course you expect me to tell you to calibrate more stuff, but I haven’t always worked in a calibration laboratory.

In a former life, I was involved where a decision to “throw it away” was made. The company was using torque wrenches to set up machines to make a product that was regulated by the federal government. The torque wrenches were low cost and came with a “Certificate of Accuracy.” No actual data, just a pretty three by five card that said certificate. They would put a sticker on them when they arrived and throw them away one year later. They maintained this practice for years. Eventually during an audit, this practice was revealed, and the regulatory body wanted a corrective action.

The regulatory agency was not satisfied with the notion of “moving forward we will calibrate our torque wrenches.” They wanted data that proved that every product that those disposable torque wrenches touched was proven to meet the specifications for the product. With thousands of batches of product being threatened by a recall, the study was completed at the cost of hundreds of man hours and found no direct link could be established.

This company calibrates their torque wrenches now. It’s cheap insurance.  

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Topics: calibration

Where is calibration mentioned in ISO 9001:2015?

Posted by Phil Wiseman on Jan 23, 2017 9:43:35 AM

The release of ISO 9001:2015 has many companies reevaluating how they do business. Why? While inherent in every business model, the concept of Risk-based thinking now requires a more articulated approach to measure inputs and outputs.

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Topics: calibration

What is the difference between Calibration and Verification?

Posted by Phil Wiseman on Jan 16, 2017 9:43:40 AM

A quick Google search will show about 500,000 results for verification vs. calibration. Obviously, there is a wide range of answers to what appears to be a simple question.

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Topics: verification, calibration

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Our goal is to provide information regarding calibration and its impact on your quality system.

In addition, we are the Geeks & Freaks of Calibration so we also post about Science for the nerd in all of us.

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