Different analytical balances have different structures and weighing methods are different. What are the common weighing methods for analytical balances? Let me introduce the method of analyzing the structure and weighing of the balance. When using the analytical balance, in addition to the relevant operating rules of the pallet balance, it should also be noted that when adding the weight, picking up the scale or other reasons, the balance beam should be supported when contacting the balance, otherwise the knife edge will be damaged. This is the use of the balance. The most important one in the rules. (1) Direct weighing method: If the solid sample is not hygroscopic and stable in the air, direct weighing can be used. First accurately weigh the quality of the clean container on the balance, then use a spoon to take a proper amount of the sample into the container and weigh its total mass. The values ​​of the two masses are subtracted to give the mass of the sample. (2) Reduction method: The weighing method is generally used for weighing on the analytical balance. The exact mass of the sample and the weighing bottle is first weighed, and then the sample in the weighing bottle is poured into a container of the drug to be held, and the estimated amount is close to the amount obtained. After filling the medicine, cover the weighing bottle and place it on the balance to accurately weigh its quality. The difference between the two masses is the mass of the sample. If too many medicines are poured into the container at one time, the weight must be discarded and never returned to the weighing bottle. If the sample to be poured is not enough, it can be added once more, but the number is less. (3) Designation method: For samples with stable properties, sometimes for the purpose of calculation, samples of the specified quality may be weighed. When weighing by the specified method, place a watch glass on each side of the balance plate (their mass is as close as possible), adjust the balance point of the balance to the center scale, and then add a fixed mass weight to the left balance pan. Add the sample to the right balance pan (this is convenient to pick and place the sample) until the equilibrium point of the balance reaches the original value. At this time, the mass of the sample is the specified mass. When using the analytical balance, in addition to the relevant operating rules of the pallet balance, it should also be noted that when adding the weight, picking up the scale or other reasons, the balance beam should be supported when contacting the balance, otherwise the knife edge will be damaged. This is the use of the balance. The most important one in the rules. The balance door should be closed every time it is weighed. When the balance is turned on after the weight is added, the pointer swing should be controlled between 2 and 4 grids. The sample is weighed and weighed in a clean and dry weighing bottle or watch glass. The weighing bottle should not be taken by hand and should be taken with a filter paper strip. At the end of the weighing, check whether the balance beam is supported, whether the weight is complete, whether the medicine is scattered into the balance, whether the balance door is closed, and whether the cloth cover is covered. After the balance has been used for a period of time, it must be sent to the metrology department for verification and adjustment. The overall cleaning of the balance should be carried out twice a year. Analytical balances are a type of balance, and they are used more and more widely in daily life. So do you understand the structure of the balance? What types of analytical balances are there? Let me introduce the structure and classification of the analytical balance. There are many types of analytical balances: mechanical, electronic, manual, semi-automatic, fully automatic, and so on. Analytical balance calibration method: can be divided into internal school type, external school type. The so-called inner school is the electronic balance with an internal calibration weight, which is convenient to retrieve at any time and one-button calibration. The external calibration type must be corrected by pressing the calibration key and manually from the outside. Electronic balance 1. Check and adjust the balance to the horizontal position. 2. Check the power supply voltage beforehand (if necessary, configure the voltage regulator ), and warm up to the required time according to the requirements of the instrument . 3. After preheating for a sufficient time, the balance switch is turned on and the balance automatically performs sensitivity and zero adjustment. After the stability mark is displayed, formal weighing can be performed. 4. When weighing, place the clean weighing bottle or weighing paper on the weighing pan, close the side door, press the peeling button lightly, the balance will automatically check the zero point, and then gradually add the substance to be weighed until the required weight. 5. The weight of the substance is the actual value displayed on the display when the “→†mark appears in the lower left corner of the display. 6. At the end of weighing, the weighing bottle (paper) should be removed in time, the side door should be closed, the power supply should be cut off, and the usage registration should be completed. Mechanical balance 1. Slowly turn the lifting pivot button, open the balance, and observe the swing range of the pointer. If the pointer swings to one side, adjust the zero adjustment screw on the balance beam. 2. Put the material to be weighed from the left door into the center of the left plate. Press the first name on the balance of the tray and take the appropriate weight with the tweezers. Put the appropriate weight from the right door to the center of the right plate and slowly raise it with the left hand. Lifting pivot button (When the quality difference between the two sides of the balance is too large, the full lift lifting pivot button may cause the lifting ear to fall off and damage the cutting edge), and the deviation of the pointer is reduced from large to small. After the gram group weight is tested, add the game code adjustment. In the process of adjusting the balance of the balance code, the right door must be closed. At this time, the lifting pivot button can be raised all the way. After the pointer swings to stop, the scale indicated on the label should be at or near zero. Erythritol For Fillings,Granular Erythritol,Sprouts Erythritol,Substitute Xylitol For Erythritol Ningxia Eppen Biotec CO.,LTD , https://www.nxeppen.com