digital manometer calibration

[Halesowen1]

You must have seen the old fellow, fumbling after his glasses and sits their looking at a water manometer, when he cannot see his hand let alone a water level moving.

 

[CMairiD]

That's why I have the Regin Premier; the gauge is very easy to read, even in darkened areas.

 

[Halesowen1]

Easier than a digital with a light, I just prefer to make my working day as easy as possible.
Cordless tools, core drills etc. It costs more but makes life a hell of a lot easier.
I dont disagree that water are good but IMO not anywhere near a digital, magnetic case, light for dark cupboards, no need to try and stand up level etc.

 

[gasmarc]

I presume that is the green metal cover with the glass tube , I have one of those also which is superb and easy to read, Someone mention about putting water in the gauge it is easier to use the correct fluid as it is coloured and easy to see. I have yet to use my digital one yet but will try it out shortly, I think its what ever your happy using , regarding yearly calibration I think that is a load of rubbish but would not surprise me if they try and enforce it.

 

[Halesowen1]

My old Tpi digital manometer is 8 years old, same model as my new one. I checked the old one today as it has not been used for a few years and never ever been calibrated, and it is smack on still, exactly same reading as brand new one.
Might get it calibrated and sell it on here. Or offer it to one of you water gauge guys to try and see how you feel with one.

 

[gasmarc]

my ones a tpi one also so that is a result , do you have a mini valve on your hose to get exact 10 millibar for let by test or not

 

[Halesowen1]

No mini valve, tpi 621 i believe my 2 are. Very good gear that tpi, I have recently changed my Flue analyser to the tpi712, same as BG use. Best one I have used, and very good calibration etc through JWM or JMW, never remember whcih one.

 

[gasmarc]

i got a good a TPI multimeter which is the muts nuts , is it not awkward getting exact pressure , I have a valve on my hose but it is for use with my v2 sprint , thats another thing I have not used yet

 

[Pssst]

I'm not sure its a matter of trust. Its just using the right tool for the right job IMHO.

My gauges..well they are simple devices but i treat them as precision instruments. I periodically strip them, clean them,flush them through with bleach and water and reassemble them. In this way they remain highly readable. I ensure they are vertical when read and i use a bright LED portable torch to read them where necessary.

As for combustion analysers..well my comparison was made with draegar pumps and tubes. If you have ever used them,you will know that there is greater scope for error both in use and interpretation of results and because of this,they have largely been superseded.

Now then..if we go back to your simple low pressure water gauge,,,if it is well maintained...a simple job to do...then when its reading 20mb..the chances are that it is indeed reading 20mb or as close as makes no difference.

However, if you attach a digital guage..to the same pressure source and it read 23mb...how would you know if it was wrong or right?..you see, as long as there are no obstructions in the flow path of the u gauge and it only contains water..it IS going to read 20mb gauge pressure.




There is also the whole issue of reading differential pressures and more than one pressure..do you buy 2,3 or more electronic gauges..? It can get pricey.

If i had any doubt about let by..i;d disconnect and use LDF and/or a gas detection instrument.

Still ,each to their own

i must be old school...

 

[gasmarc]

As i said I have both , regarding cleaning I have never done that in my life and mine is perfect to read as it is glass with the correct fluid in it. Time will tell I suppose I use to have a monument the yellow plastic one which is rubbish , you cannot beat the glass regin ones . I disagree with what you say about reading the correct pressures etc ,If they did not work they would not use them, A manometer is a smaller version of a spirit level , clear plastic hose with few marking on each end and away you go

 

[darking]

So there you have it halsoweni, I may have a bus pass but I haven't let life pass. I'll show you mine if you show me yours

 

[Halesowen1]

So there have what?
Pass on that invitation, thanks.

 

[Halesowen1]

I'm not sure its a matter of trust. Its just using the right tool for the right job IMHO.

My gauges..well they are simple devices but i treat them as precision instruments. I periodically strip them, clean them,flush them through with bleach and water and reassemble them. In this way they remain highly readable. I ensure they are vertical when read and i use a bright LED portable torch to read them where necessary.

As for combustion analysers..well my comparison was made with draegar pumps and tubes. If you have ever used them,you will know that there is greater scope for error both in use and interpretation of results and because of this,they have largely been superseded.

Now then..if we go back to your simple low pressure water gauge,,,if it is well maintained...a simple job to do...then when its reading 20mb..the chances are that it is indeed reading 20mb or as close as makes no difference.

However, if you attach a digital guage..to the same pressure source and it read 23mb...how would you know if it was wrong or right?..you see, as long as there are no obstructions in the flow path of the u gauge and it only contains water..it IS going to read 20mb gauge pressure.




There is also the whole issue of reading differential pressures and more than one pressure..do you buy 2,3 or more electronic gauges..? It can get pricey.

If i had any doubt about let by..i;d disconnect and use LDF and/or a gas detection instrument.

Still ,each to their own

i must be old school...

The tpi 621 which I and others on here use, do read dual differential pressures up to + or - 300mb. Plus kPa, psi, in Hg, mmHg, mmH2O, inH2O. So more than enough for the domestic gas work I do.

 

[darking]

ill show you my u tubes you show me the meter you wish to pass on is what i meant

 

[Halesowen1]

Getting worried now.

 

[darking]

I promise I'll be gentle........

 

[Halesowen1]

Is that what you say to all your apprentices??

 

[darking]

along with "You know i'll still respect you in the morning" or is that also a matter of trust?