How to calibrate the water meter
It can be verified by a water meter verification device.
The water meter verification device is a fully automatic water meter verification device. It adopts high technology to make it easy to operate, stable and reliable, improve the verification efficiency, avoid human errors, and has a high cost performance.
Calibration principle: Install a camera device above each water meter to be tested, and connect it to the image collector and high-speed computer. The computer automatically recognizes the flow indication value of each pointer of the water meter (the reading of the meter is no longer required by human eyes), and at the same time automatically controls The water flow rate and the water level of the working gauge are measured to obtain the standard flow value, so as to realize the automation of the whole process of water meter calibration.
Extended information:
The internal structure of the traditional water meter can be divided into three parts: shell, sleeve and inner core from the outside to the inside. The shell is cast iron, and after the water comes out of the water inlet, it passes through the lower annular space of the shell, which is called the "lower annular chamber" here. Above this annular space, there is an "upper ring chamber" that communicates with the water outlet. There is a filter screen with small holes at the bottom of the sleeve to filter out the sundries in the water.
There are upper and lower rows of round holes on the side of the sleeve. The positions of the holes are just opposite to the upper and lower ring chambers of the shell. Obviously, the lower row is the water inlet hole, and the upper row is the water outlet hole. It is particularly noteworthy that these two rows of holes are punched obliquely along the tangential direction of the circle.