Positive Displacement Type Flow Meter

What brand and type of flowmeter do you have? Who is the manufacturer and what does the manufacturer say?

This should be your first visit when seeking information.

You will learn more and have a much steeper learning curve when asking the right people.

Saying that: we are not the right people given that the information is not complete to even get started!

Declined. Contact the instrument manufacturer directly, and ask directly.

What is wrong with the documentation, that came with the instrument? It is available even for older equipment. You planned exercise ought to be described there in ample details.

As a trainee you should be aware of a certain phrase... D.I.Y

Do It Yourself!

You asking us for the answer is the easy and lazy option, not very commendable.

Once you have found the answer then ask your trainer, as every trainee MUST have a trainer, if you don't understand the answers or the technical handbook.

I wonder how you manged to find CR4, I bet you were googling for an answer and came across CR4.. Yes? Keep googling!

Sameer,

There are a number of brands and types of positive displacement meters.

You need to provide size; process (liquid or gas); point-of-sale or not (the required accuracy becomes an issue).

Basically, think it through...what goes in, must come out (that's what positive displacement means). Very simply, you have to put a known quantity of something (generally water) through the meter, and measure what comes out. The difference in measurement (v1/v2 x 100)is the accuracy expressed as a percentage.

Larger bore meters may require a meter proving loop and are certainly not a matter for a trainee engineer. Like others have said, call the manufacturer....

Now i satisfied with the answer of Hilton ,

Too easy! What did you find out about troubleshooting a positive displacement flow meter?

Please post any learnings in the forum so we all can benefit from it!

Thanks!

Please post any learnings in the forum so we all can benefit from it!

Sarcasm is the lowest form of wit...why didn't you address me personally ?

Did he not state he was a trainee ?

Did he state any specific meter information eg liquid/ gas, or that he was in the process of calibrating a meter ?

Did it seem to you that English is his mother tongue ? Can you address technical questions in another language ?

Do you not recognise that he knows quite well that calibration & trouble-shooting procedures appear in a technical manual ? Does this not mean that his post was of general academic nature ?

Did I not state my response simply so that the OP would understand ?

Did the OP indicate he was satisfied, or not ?

Seems to me it was only you who was not satisfied ?

I did not address you because I did not mean you!

I wonder how easily satisfied OP was when having only half of his question answered.

You brilliantly answered the first part of the question with the principle of how the calibration is done which none of us came up before. And it seems you hit the nail on the head. Seems the trouble shooting was of no interest anymore.

Yes he is a Trainee and English is oviously not his mother tongue (nor is it mine). But where from do you deduct that he knows of technical manuals?

What is wrong asking OP to come back with his or her expirience? Would it not make much more sense for the forum and future readers?

I see this as the price that OP could pay for getting free advice. We are all in here with our knowledge and it should be a take and give.

And thanks for the compliment! I fill in the remaining part

... but the highest form of intelligence!

Have a good day!

Regardless of which type of flowmeter you are using, the only correct way to accurately calibrate any flow meter is with a flow bench/testing station which requires shipment to a facility that has the right equipment.

You could use a portable clamp on meter to check the meter accuracy but you cannot effecitvely calibrate any flowmeter in the field accurately because the clamp on meter's accuracy is affected by too many unknown conditions/dynamics.

You can set the range, scale, EU, temperature correction, zero point, and any other parameter the manufacturer allows user access to however this does not calibrate the meter.

If you suspect the meter is inaccurate, purchase a spare unit, remove the suspect unit, replace it with a newly calibrated unit, and send the old one out for calibration.