Am I right in thinking that a "water gauge" pressure measurement is just how
far a column of water gets moved in a U shaped tube, measured in inches?

Dave

In an earlier contribution to this discussion,
Dave wrote:

Am I right in thinking that a "water gauge" pressure measurement is
just how far a column of water gets moved in a U shaped tube,
measured in inches?

Dave

Yes, provided the sides of the U are vertical. It's the difference in levels
of the 2 sides.

If you're measuring the pressure in In.Wg, just take a direct reading in
inches. If you need millibars, you'll need to do a conversion. [The burner
pressure table for my boiler specifies both mbar and in.wg]

--
Cheers,
Set Square
______
Please reply to newsgroup. Reply address is invalid.

"Set Square" wrote in message
...
In an earlier contribution to this discussion,
Dave wrote:

Am I right in thinking that a "water gauge" pressure measurement is
just how far a column of water gets moved in a U shaped tube,
measured in inches?

Dave

Yes, provided the sides of the U are vertical. It's the difference in
levels
of the 2 sides.

If you're measuring the pressure in In.Wg, just take a direct reading in
inches. If you need millibars, you'll need to do a conversion. [The burner
pressure table for my boiler specifies both mbar and in.wg]
--
Cheers,
Set Square
______
Please reply to newsgroup. Reply address is invalid.


Thanks, no need to spend money on a manometer then :-)

Dave

"Dave" wrote in message
...
Am I right in thinking that a "water gauge" pressure measurement is just
how
far a column of water gets moved in a U shaped tube, measured in inches?

Dave

same idea with mm or inches of mercury - but it obviously needs higher
pressure to move mercury than water )

In an earlier contribution to this discussion,
Dave wrote:

"Set Square" wrote in message
...
In an earlier contribution to this discussion,
Dave wrote:

Am I right in thinking that a "water gauge" pressure measurement is
just how far a column of water gets moved in a U shaped tube,
measured in inches?

Dave

Yes, provided the sides of the U are vertical. It's the difference
in levels of the 2 sides.

If you're measuring the pressure in In.Wg, just take a direct
reading in inches. If you need millibars, you'll need to do a
conversion. [The burner pressure table for my boiler specifies both
mbar and in.wg] --
Cheers,
Set Square
______
Please reply to newsgroup. Reply address is invalid.


Thanks, no need to spend money on a manometer then :-)

Dave

It's quite easy to make your own manometer for checking boiler gas
pressure - using a length of plastic tube bent into a U, a strip of wood and
a sheet of graph paper. [Come back Blue Peter - all is forgiven!]g
--
Cheers,
Set Square
______
Please reply to newsgroup. Reply address is invalid.

In article , "Set Square"
says...
In an earlier contribution to this discussion,
Dave wrote:

Am I right in thinking that a "water gauge" pressure measurement is
just how far a column of water gets moved in a U shaped tube,
measured in inches?

Yes, provided the sides of the U are vertical. It's the difference in levels
of the 2 sides.

The tubes don't need to be vertical, as long as your measurement is.

In an earlier contribution to this discussion,
Rob Morley wrote:

In article , "Set Square"
says...
In an earlier contribution to this discussion,
Dave wrote:

Am I right in thinking that a "water gauge" pressure measurement is
just how far a column of water gets moved in a U shaped tube,
measured in inches?

Yes, provided the sides of the U are vertical. It's the difference
in levels of the 2 sides.

The tubes don't need to be vertical, as long as your measurement is.

Whilst that is true in pedantic terms - it doesn't really add much to the
fund of human knowledge in practical terms! [Would you *really* want to
devise a means of measuring the vertical distance when the tube was *not*
vertical?!]
--
Cheers,
Set Square
______
Please reply to newsgroup. Reply address is invalid.

In article , "Set Square"
says...
In an earlier contribution to this discussion,
Rob Morley wrote:

In article , "Set Square"
says...
In an earlier contribution to this discussion,
Dave wrote:

Am I right in thinking that a "water gauge" pressure measurement is
just how far a column of water gets moved in a U shaped tube,
measured in inches?

Yes, provided the sides of the U are vertical. It's the difference
in levels of the 2 sides.

The tubes don't need to be vertical, as long as your measurement is.

Whilst that is true in pedantic terms - it doesn't really add much to the
fund of human knowledge in practical terms! [Would you *really* want to
devise a means of measuring the vertical distance when the tube was *not*
vertical?!]

I was just pointing out that you don't need to worry about whether the
tube is perfectly aligned in order to get an accurate measurement -
obviously the two sides should be somewhere near vertical to make life
easier.

Set Square wrote:
In an earlier contribution to this discussion,
Rob Morley wrote:

In article , "Set Square"
says...
In an earlier contribution to this discussion,
Dave wrote:

Am I right in thinking that a "water gauge" pressure measurement is
just how far a column of water gets moved in a U shaped tube,
measured in inches?

Yes, provided the sides of the U are vertical. It's the difference
in levels of the 2 sides.

The tubes don't need to be vertical, as long as your measurement is.

Whilst that is true in pedantic terms - it doesn't really add much to the
fund of human knowledge in practical terms! [Would you *really* want to
devise a means of measuring the vertical distance when the tube was *not*
vertical?!]

Spirit (or laser) level, plumb-line, ruler (or tape measure.)

You have to be careful if the distance is long enough for the curvature
of the earth to become a factor.

In an earlier contribution to this discussion,
Ian Stirling wrote:

You have to be careful if the distance is long enough for the
curvature of the earth to become a factor.


It would have to be a *bloody* big manometer!g
--
Cheers,
Set Square
______
Please reply to newsgroup. Reply address is invalid.

Set Square wrote:
In an earlier contribution to this discussion,
Ian Stirling wrote:

You have to be careful if the distance is long enough for the
curvature of the earth to become a factor.

It would have to be a *bloody* big manometer!g

True
I suppose at that level, tides might be important.