What are the causes of inaccurate metering?
Time:2023-03-13
Views:724
1. The meter itself quality problem
● Water meter metering error caused by unqualified accessories
● The meter is not verified before delivery, resulting in errors in meter measurement
● The accuracy of the old meter is not enough to cause metering errors
2. Overdue water meter problem
Water meters, like many commodities, also have a shelf life, due to the poor working environment of the water meter, so the water meter should be regularly verified and replaced.
Water meter impeller rotation and center friction frequently, resulting in center wear, on the one hand will lead to the increase of friction resistance between the center and the impeller, water meter measurement is negative; On the other hand, the position of the impeller will decrease, the distance between the impeller and the impeller box will increase, the resistance will decrease, and the measurement of the water meter will be biased.
Whether the measurement value is negative or positive, it will produce measurement error.
3. Water meter selection problem
The user does not choose the right caliber when selecting the water meter. If the caliber of the water meter is too large, the water flow is lower than the minimum flow specified by the water meter at the trough, so that the meter is negative. If the caliber of the water meter is small, then most of the time, the water flow is greater than the rated flow specified by the water meter, and long-term operation will cause mechanical wear of the water meter parts, which will also cause errors in the meter measurement.
4. The effect of air in water
After the pipe is repaired, it often mixes with air.
On the one hand, most of the air remaining in the water meter stays in the upper part, and when it is discharged out of the water meter with the water, the metering value of the water meter is too large, and the actual displacement is small.
In addition, the remaining air can also weaken the role of the water meter regulator, so that the counterattack effect of the regulator on the water is smaller, and the water meter measurement is biased.
On the one hand, most of the air remaining in the water meter stays in the upper part, and when it is discharged out of the water meter with the water, the metering value of the water meter is too large, and the actual displacement is small.
In addition, the remaining air can also weaken the role of the water meter regulator, so that the counterattack effect of the regulator on the water is smaller, and the water meter measurement is biased.
5. Water quality problem of the pipe network
Why does the meter go fast? The quality of the pipe is not good, there is debris, debris left in the installation or the problem of water quality itself, when the debris blocks part of the water inlet, the flow rate is fixed, and the water flow rate through the water meter will increase, and the water meter measurement is biased.
Why is the meter slow? When debris passes through the water meter filter, it is easy to cause the water meter impeller to be entangled and squeezed, causing the impeller to be separated from the gear or stuck, and the water meter measurement is negative.
Why is the meter slow? When debris passes through the water meter filter, it is easy to cause the water meter impeller to be entangled and squeezed, causing the impeller to be separated from the gear or stuck, and the water meter measurement is negative.
How to solve the inaccuracy of water meter measurement?
- Strengthen inspection, carry out periodic verification, and replace when it expires.
- Replace old water meters with new water meters, use water meters from regular manufacturers, and explore the use of new meters with accurate measurement.
- Choose the right water meter to avoid the mismatch between the caliber of the water meter and the water flow.
- Technical training and responsibility education for water meter verification personnel.
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