Nice video. If had to make any needle adjustments during calibration, I would be re-checking my IP to make sure all is still well. I have never seen the glass-plate method mentioned by other commentators. Not the common procedure around here, I guess. Sounds like more trouble with glass plate and a scale.
What does it mean, if when I open the petcock (to fill cylinder) and it automatically fills the cylinder. Without the need to push down on the main air valve. Any help would be appreciated. Thanks
There are a number of variables related to the exact volume of the water needed to fill bowl and the amount needed to extracted to check throughout the range of operation. The water should have all air evacuated and be at room temperature. The empty meter should be weighed and then filled with water and weighed again with the weight of water needed to fill the bowl. That weight times the percentage within the range of operation of the check gives the weight of water to remove for each percentage
you talk about adjusting the tabs if the gauge doesn't read zero, can you talk about that, also every video I have seen on air meter calibration does it on a new meter, that's easy to do, doing one on a meter that's been used and abused is a little harder.
in ASTM C231 (Section 8.3.2.1) states "Jar the meter gently until all air is expelled from this same petcock." You are not supposed to shake it like that
the calibration procedure is wrong, where is your glass plate to make sure you have zero air? and when filling the meter with the tube you are suppose jar it as you add water shaking it introduces air into the system, and where is your weights for empty vessel with plate? and empty vessel with water and plate? you need those to calculate actual reading against gauge reading
Water not confirmed to be 23.0 C. No weighing of the discharged water in the graduated cylinder? No calculating air content by water discharged? No check at 10%? This was not done in accordance with ASTM
Thanks for sharing, very Educative and Informative.
Nice video. If had to make any needle adjustments during calibration, I would be re-checking my IP to make sure all is still well.
I have never seen the glass-plate method mentioned by other commentators. Not the common procedure around here, I guess. Sounds like more trouble with glass plate and a scale.
What does it mean, if when I open the petcock (to fill cylinder) and it automatically fills the cylinder. Without the need to push down on the main air valve. Any help would be appreciated. Thanks
There are a number of variables related to the exact volume of the water needed to fill bowl and the amount needed to extracted to check throughout the range of operation. The water should have all air evacuated and be at room temperature. The empty meter should be weighed and then filled with water and weighed again with the weight of water needed to fill the bowl. That weight times the percentage within the range of operation of the check gives the weight of water to remove for each percentage
you talk about adjusting the tabs if the gauge doesn't read zero, can you talk about that, also every video I have seen on air meter calibration does it on a new meter, that's easy to do, doing one on a meter that's been used and abused is a little harder.
What is the volume of the graduated cylinder? Once you adjust it to 5% does that mean that your initial pressure is calibrated to 3%?
Is that per ASTM C231?
in ASTM C231 (Section 8.3.2.1) states "Jar the meter gently until all air is expelled
from this same petcock." You are not supposed to shake it like that
Also petcocks should sty open while you pump air into the chamber. That way you know if the pump is leaking
the calibration procedure is wrong, where is your glass plate to make sure you have zero air? and when filling the meter with the tube you are suppose jar it as you add water shaking it introduces air into the system, and where is your weights for empty vessel with plate? and empty vessel with water and plate? you need those to calculate actual reading against gauge reading
Water not confirmed to be 23.0 C. No weighing of the discharged water in the graduated cylinder? No calculating air content by water discharged? No check at 10%? This was not done in accordance with ASTM
I want aggregate correction factor
Very good
Calibración C0170/F