Great video, very informative as per usual. It would be interesting to see an example of a calibration for various different instruments if it’s possible, maybe a pressure or dp transmitter just being able to see the whole process of the setup/calibration or commissioning would be amazing! Keep up the good work, I’m enjoying where the series of videos is heading
Could in the field o r underdevelopment country lack equipment calibrate by set zero and range specifications over spectrum be good...thanks for information
Thank you for the useful info. I understand that any errors measured during calibration will inform adjustment of the instrument to reduce errors. But, is it also appropriate to determine a calibration factor/curve that allows you to perform post hoc correction of measurements, rather than adjusting the equipment itself?
Hi there, glad you enjoyed the video. It really does depend on the application of the instrumentation that is being calibrated. In most industrial use cases instrumentation is providing live plant data. Adding in a correction factor or linearization curve to DCS / SCADA software, so that the measured value is corrected for an Instrument out of calibration, would be more work than to adjust and re-test the instrument. Hope this helps!
Thanks for sharing. May I know how we set the calibration point of an equipment? Have any specification or standard to refer? Example: the calibration point for an equipment for standard requirement for 20±5°C, 47°C, 50°C and 55°C. Appreciate your reply, thank you.
Hi there, the accuracy of calibration requirement isn't usually specified in units as in so many BAR or degrees. Accuracy requirements are usually given as a percentage of the range of the equipment. The standard will depend on the application of the instrumentation, that being said 1% of range is a common standard. So if a temperature transmitter was ranged 50 degrees - 250 degrees then a 1% specification would equal 2 degrees. (250-50) / 100. Hope this helps?
Great video... can you make a video on how to install a new transmitter into a loop that is made a different manufacturer or upgraded model. I'm an instrument tech on an older oil and gas facility in the gulf of mexico and my background is mainly pneumatic control panels and devices with only SCADA to remotely monitor pressures and status but no control.
Hello , thanks for the video. One more thing i wud like to ask.... Can we do transmitter AO trimming while the transmitter is in service? No pressure calibration involve and its only just AO trimming because when we did the loop check we didn't get the right current as what we feeded.
Hi, thank you for such an informative video, I am calibrating my thermocouple, but my error is propagating, for example, it was +_ 0.1 degree C at 20 degree Celsius, it increased to 1 degree C at 100 degrees, and 1.5 degrees C at 200 degree celsius, I want to give one pet value that my thermocouple has this much error, like +_ 1 degree, how can i calculate this over all error
I would think that would be a useless number. Your error is non-linear, so an average error for the operating range doesn't really help the user unless it's a very narrow operating range and the average error is WELL within their allowed tolerance. This isn't the kind of thing I find I have to worry about practically, but I'd think I'd provide at least the max error to be expected across the full range if not a chart or graph for expected error across the operating range given that it's not a constant or linear expected error. But maybe someone in the industry that deals with this actual issue can provide some wisdom.
Hey guys I just passed my NCCER test for instrument tech and was wondering if y’all know anybody needing JR techs/entry level techs. I am still pursuing my associates, but was wondering if I could get hired on to get field experience already. Thanks for any info.
@@WilisWar it was 100 questions and they’re all multiple choice. If you read the modules and pay attention it’s not hard just make sure you understand the concepts in each module.
@@martingarcia2265 Can you send me a link on where I could do one for instrument tech and do you have to pay? I'm currently on the same path as you going college to get my associate's for instrument tech
If you need a process meter for carrying out Calibrations on 4-20mA loops then the Fluke 789 is the perfect option. Check out my video on "how to use a process meter" for information. If you want to purchase one. Check out them out here on Amazon amzn.to/3fhDQWj ▶▶Check out brilliant T-shirts / Merch at my store: www.redbubble.com/people/rudd4y/shop?asc=u ▶▶Check out my website for more articles on Instrumentation: www.instrumentationcontrol.info/articles
"What makes the operator trust the instrument"? Answer: they don't. Operators ALWAYS know better. That's why they're operators. I once saw a reactor operator who didn't believe what an instrument was telling him, so he tapped on it. I had to point out to him that tapping on a computer screen really wasn't going to work, but since I was just an instrument tech and he was a reactor operator, he just ignored me and kept tapping. Odd!y enough, the reading didn't change.
![Instrumentation Calibration - [An Introduction]](/img/logo.svg){kind=logo}
