1. Understand the structure and scale markings of the water meter
A mechanical water meter usually consists of a dial, a pointer, a character wheel and other parts. The dial is marked with different numbers and scales, representing different water measurement units. Generally, there will be a m³ (cubic meter) mark on the water meter, indicating that the volume of water is measured. The water meter may have a red pointer and multiple black pointers, or there may be a distinction in the color of the scale. The red part usually indicates the reading of the decimal part, while the black part indicates the reading of the integer part, which helps us distinguish the water values of different magnitudes. In addition, the character wheel part generally directly displays integers, and the carry method is decimal. For example, the rightmost number represents the ones place, the adjacent left number represents the tens place, and so on.
2. Read the integer part
Start reading the value indicated by the black pointer or character wheel from the left side of the dial. If the black pointer points between two numbers, read the smaller number. For example, if the black pointer is between 3 and 4, read 3. Then read the values of all pointers or character wheels representing integers in order from left to right, and combine them to get the integer reading. For water meters with larger diameters or special specifications, if the reading scale is displayed by multiple small dials, the pointer values on each dial are also read in order from left to right (generally from large flow level to small flow level), and finally combined into the integer reading.
3. Read the decimal value
If there is a red pointer or a scale part specially marked with decimals on the water meter, it is used to read the decimal water consumption value. Each rotation of the red pointer indicates a certain proportion of decimal water volume. For example, there may be scale marks such as 0.1 and 0.01 next to the red pointer, indicating that each rotation of the pointer represents 0.1 cubic meters, 0.01 cubic meters, etc. The decimal reading is obtained after reading the value pointed by the red pointer and converting it according to the ratio marked next to it. Some water meters may have decimal scales on the integer dial that are represented by smaller scales, and are also read according to the unit ratio marked on them.
4. Calculate the total water consumption
Add the integer and decimal values to get the total reading of the water meter, which indicates the total amount of water used. For example, if the integer part is 123 cubic meters and the red pointer of the decimal part points to the scale corresponding to 0.4 cubic meters, the total water consumption is 123.4 cubic meters. It should be noted that every time you read the water meter reading, you should try to read the position of the pointer as accurately as possible. If the pointer is exactly between two numbers or the scale is vague and difficult to judge, you need to make a reasonable estimate based on the actual situation, and try to keep the reading method consistent the next time you read the reading to reduce the error.
