Is there any deviation in the water meter measurement? Why?
Water meter is the only measuring instrument for the water supply enterprise and the user to settle the trade. It is the main basis for the water users to collect the water fee. The deviation of water meter measurement will have a negative impact on water supply enterprises to improve water rate recovery and reduce production and sale rate, and will easily cause disputes between water supply enterprises and users. Talking about the causes and Countermeasures of metering deviation of water meter in light of practice.
? causes of measurement deviations? water meter problem- water quality issues: (1) the water meter is not the regular manufacturers of water meter, water meter fittings unqualified (2) when the factory is not verification or verification is not qualified; nor do correction; or verification device itself is not qualified (3) class a meter accuracy old enough. This will inevitably result in water meter measurement deviation.
The problem of water gauge over time: water meter should be checked regularly and replaced at maturity. (1 meter) when in use, the rotation of the impeller and the top friction frequently, while the top is an important component of water meter support within the rotation of the impeller, which is the result of a top wear between the top and the impeller friction resistance increases, the water meter is negative; two impeller position decreased, increased between the impeller and the impeller box resistance decreases the water meter is partial. (2) in water use, due to non-uniform distribution of water meter, water flow flows through the impeller inlet box side flow is greater than the water outlet side, one of which is that the middle and top impeller impeller sleeve frequent friction, tilted to the side edge of the water outlet, impeller and impeller parts box wall close, increasing resistance at the same time, the impeller diameter by grinding, water impact on the impeller torque is small, the water meter is negative; two upper middle and upper impeller sleeve is inclined to the water outlet, the upper splint sleeve is frequent friction, into an oval, the impeller axial shift, wear between the impeller shaft and gear box, to make the resistance increase also, partial negative water meter.
