Three measurement methods of mechanical balance

What is the measurement method of a mechanical balance? Mechanical balance is a teaching instrument that is one of many types of balances and is widely used in many fields. Users need to understand the measurement method of a mechanical balance when using it. The correct measurement method can ensure the accuracy of the measurement data. Today, I will mainly introduce the measurement method of a mechanical balance to you, hoping to help you.

(1) Direct weighing method: If the solid sample is not hygroscopic and is stable in the air, the direct weighing method can be used. First, accurately weigh the mass of the clean container on a balance, then use a medicine spoon to take an appropriate amount of the sample and add it to the container, and weigh its total mass. Subtract the values ​​of these two masses to get the mass of the sample.

(2) Subtraction method: The subtraction method is generally used for weighing on an analytical balance. First weigh the exact mass of the sample and the weighing bottle, then pour a portion of the sample in the weighing bottle into the container to be filled with the medicine until the estimated amount is close to the required amount. After pouring the medicine, cover the weighing bottle, place it on the balance and weigh it accurately. The difference between the two masses is the mass of the sample. If too much medicine is poured into the container at one time, it must be discarded and weighed again, and never put back into the weighing bottle. If the sample poured is not enough, it can be added again, but the number of times should be small.

(3) Designated method: For samples with relatively stable properties, sometimes a designated mass of sample can be weighed for ease of calculation. When weighing using the designated method, place a watch glass on each side of the balance pan (their masses should be as close as possible), adjust the balance point of the balance to around the middle scale, then add a fixed mass weight to the left balance pan, and add the sample to the right balance pan (this makes it easier to take and place the sample), until the balance point of the balance reaches the original value. At this time, the mass of the sample is the designated mass.

The measurement method of the mechanical balance has been introduced. Now that we have mastered the measurement method, it will be more convenient to use the mechanical balance for measurement, and the data obtained will be more accurate. If you want to know more product information, you can go to the China Instrument Academy for inquiries.