Glad you enjoy the videos Freya, I'm slowly putting out more content all the time so keep an eye out :)

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Hi @Andrew Taylor I'm glad you are enjoying the videos. Keep an eye out for content in the future.

Muito bom. 👏

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Glad you enjoyed!

I'm in the exact same boat except I've been hired as an instrumentation technician in the oil industry. I totally agree, it's hard to find good videos on this type of stuff.

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Coming soon!

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Thanks Lee. Thought I'd mix it up. Filmed on Xmas day this one.

Great work, exactly what I was looking for so thanks for that! If there was a greater error between the PV and the mA output what would you have to do to correct that? Keep up the great videos and happy new year!

With the HART communicator you can perform a calibration by applying a known 0% and 100% pressure signal. The transmitter will then change the 4 - 20 mA signal appropriately. I'll do a follow up video with an out of range transmitter at some point if that helps. Happy Newyear Lee

Yeah that would be great if you could do that please! I don’t ever get the opportunity to use the hart communicator in my role I’m just tasked with the initial set up of parameters etc with an already calibrated instrument so it’s great to see from that perspective!

Glad you like it

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youtube.com/@instrumentprocessmanagement?si=e2mCsliY5COd00aj

Thank you. Hope you enjoy

www.youtube.com/@InstrumentProcessManagement

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No problem, hope it helps.

Glad it was helpful!

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Most welcome 😊

You do the same process he did with 15 instead of 5

Hi Kenneth. I'm sure you have the right skill set to get into Instrumentation. I would suggest getting comfortable with signal and Instrumentation types as a start. Hopefully you're working as part a team, if you are make sure to get as much information / experience from them as possible. Once you have the basics down it really is an experience game. One thing I did when learning my trade, whenever I came across a subject or concept I didn't understand I'd make a note and then research or ask questions until I did understand :) Hope this helps and good luck on your journey.

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You are welcome!

Thanks!

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Hi Kejon. When we give the error of an Instrument it's always in relation to a percentage of the Instruments range. If you do the calculation based on the error of each setpoint then percentage errors will be different depending on setpoint only, this makes no sense and give no context. The range of the Instrument gives a clear error magnitude regardless of setpoint. Hope this helps?

You can calculate two different types of error for a pressure transmitter: 1) absolute error and 2) percent of reading error. The type of error you are asking about is #2, percent of reading error. The type of error that is being calculated in this video is #1) absolute error. Both error calculations are used by manufacturers of pressure transmitters and pressure gauges. Absolute error is usually represented as "percent of full-scale error", or %FSO, and is calculated as 100*(measured value - expected value) / (full-scale pressure - minimum pressure). Note that if your gauge's maximum pressure is +100 (psi or ?) and its minimum is 0, then (full-scale pressure - minimum pressure) is (100 - 0) = 100 (a uni-directional gauge). If the gauge's maximum pressure is +100 and the minimum is -100, then (full-scale pressure - minimum pressure) is (+100 - (-100+) = 200 (this is called a bi-directional or zero-centered gauge). If you had a -15 psi to +100 psi gauge, then the (full-scale pressure - minimum pressure) is (100 - (-15)) = 115. In this video, the author was calculating the full-scale error based on the mA output of the transmitter instead of the pressure value. So therefore, the video uses the equation 100*(measured mA value - expected mA value) / (maximum mA value - minimum mA value) = 100*(M - E)/(20mA - 4 mA) = 100*(M - E) / 16. The percent of reading error is calculated as 100*(measured value - expected value)/ expected value. Percent of reading error should also be specified such as: +/- (fixed value + x% of reading), i.e: +/- (40 + 3%rdg). The fixed value is to fix the problem you would have at the expected value of 0. In the case of an expected value of 0, you would be dividing by zero, which you cannot do mathematically. Hence, as you approach the zero value, the error becomes equal to the fixed value. This is not a problem with the absolute error calculation though, as you always divide by the pressure span (max pressure - min pressure).

Thanks guys appreciate it and noted!!!!🙏🏽

Thanks

Hi there, you are correct there was no external power supply. The fluke 789 connected in that configuration is able to provide the loop power required to the transmitter. Some transmitters require separate supplies but lots are 2 wire loop powered devices. Check out my process meter video for more info. Hope this helps, have a great day.

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No need to save. Saving will only save the configuration on the HART device, not the Instrument. Although if you keep offline back ups of your HART configurations you can save. Hope this helps.

Hi there, this is for Instrumentation technicians working in various industries

this was only a demonstration calibration. The errors were well within most common accepted tolerances so adjustment was not necessary. Hope you enjoyed the video.

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