[Weekly Topic] (37) July 25, 2015: A brief overview of the precautions for using electronic balances.

1) The balance room must be kept highly clean. When cleaning it, it should only be wiped with a damp cloth; a soaked mop must never be used for mopping the floor. Do not bring wet items inside to avoid increasing humidity. (2) The outside of the balance should be cleaned at all times, at least once a week. Generally, a soft brush, fleece cloth, or suede can be used to remove dust from the balance. When cleaning, be careful not to touch the balance components with your hands, as moisture remaining on these components can cause metal oxidation and errors in measurements. Therefore, fine-gauge sewing gloves or extremely thin rubber gloves should be worn, and the operation should be carried out along the metal’s smooth surface texture to avoid damaging the surface finish of the parts. To prevent the accumulation of harmful substances, the base should be cleaned immediately after each weighing. The working edges of the agate blades on the crossbeams must be kept highly clean; a chamois should be used to slide back and forth along these edges in order to clean them gently. The agate surfaces of the middle blade holder and the edge blade pads, as well as all the agate bearings, should also be cleaned with a chamois. The walls of the damper can be cleaned with a soft brush and suede, after which a 20–30x magnifying glass is used to check for any remaining fine particles. (3) Near the electronic analytical balance and weights, a certification of calibration for the actual error of those balance and weights should be kept, so as to obtain the necessary accurate data during measurements. (4) A desiccant should be placed inside the balance glass frame; colored silica gel is preferred, and care should be taken to replace it. (5) When moving an electronic analytical balance, the beam, lifting lugs, and weighing pan must be removed. When moving over long distances, it also needs to be properly packaged. The outside of the box should be marked with directions and hazard symbols, along with instructions such as \"Do not invert – precision instrument.\" Anhui Huasheng Technology Holding Co., Ltd. is a leading one-stop service platform for laboratory planning, design, and renovation. It offers application solutions for complete laboratory equipment systems, with products including laboratory instruments, equipment, accessories, furniture, fume hoods, and more.

1. The four corners should make firm contact with the table surface without any wobbling; adjust the electronic balance to ensure it is level ； 2. The electronic balance should be preheated for more than 30 minutes ； 3. Maintain the environmental hygiene inside the balance room; keep the weighing area of the balance clean, and promptly and carefully remove any items that may have fallen there ； 4. When weighing volatile and corrosive substances, they should be placed in sealed containers to prevent corrosion and damage to the electronic balance ； 　　 5. Do not overload the balance when using it to avoid damaging it ； 　　 6. The temperature of the object placed on the balance should not be too high to avoid damaging the instrument; generally, the temperature should be ≤70℃ ； 　　 7. The usage area should be kept away from windy places or direct sunlight ； 8. Use a dedicated power supply to avoid electromagnetic interference.......

The four operation modes of PID control in DCS operator control

①Preheat the electronic balance for 30 minutes before starting weighing. 　　②Check the balance bubble at any time to ensure the balance is level. 　　③The balance should be regularly calibrated by a designated person to ensure its accuracy at all times. 　　④When using a balance for weighing, handle it gently; it is absolutely not allowed to subject the balance, especially the weighing pan, to significant impacts or vibrations. ⑤ Be careful not to spill any materials onto the balance during weighing. 　　⑥When opening and closing the balance door, move it gently; no noise is allowed. Handling of spilled materials: a) Seek help from someone experienced to handle it. b) In emergency situations, one must use appropriate methods to deal with it, making sure that the materials do not end up under the weighing pan. For solid materials, the door of the balance should be fully opened and the materials blown out using a bulb syringe; for liquid materials, clean filter paper should be used to gently absorb the excess liquid. If this method isn’t effective, it is necessary to seek help from an experienced person. ⑦ When using the balance for weighing, the mass of the object being weighed must not exceed the scale’s capacity. 　　

Brief overview of precautions for using an electronic balance: When using an electronic balance, the following 4 points should be taken into account: 1) Before using the electronic balance for the first time after installation, it must be leveled and calibrated. 2) The electronic balance should be powered on and preheated for at least 30 minutes before use, before weighing can take place. 3) The electronic balance should achieve the required stability before taking a reading during weighing. 4) When not in use for an extended period of time, the electronic balance should be powered on from time to time to keep its electronic components dry.

1) Before using an electronic balance for the first time after installation, it should be leveled and calibrated. 2) The electronic balance should be powered on and preheated for at least 30 minutes before use, before weighing can take place. 3) The electronic balance should achieve the required stability before taking a reading during weighing. 4) When not in use for an extended period of time, the electronic balance should be powered on from time to time to keep its electronic components dry.

Briefly describe the precautions for using an electronic balance. (1) The electronic balance should be kept level. (2) It should be preheated according to the instructions provided. (3) Maintain good hygiene in the balance room at all times, and especially keep the weighing area clean; any spilled items should be removed promptly and carefully. 　　(4) When weighing volatile and corrosive substances, they should be placed in sealed containers to prevent corrosion and damage to the electronic balance. 　　(5) Do not overload the balance when using it to prevent damage to the balance. 　　(6) The temperature of the object placed on the balance should not be too high to avoid damaging the instrument; generally, the temperature should be ≤70°C. (7) The usage environment should be free from wind or direct sunlight

Temperature, humidity, and air flow all have an impact

1. Before using the balance, check whether it is level and ensure that the base is clean; brush it clean with a brush. 2. Connect the power supply, turn on the balance, and check the zero point. 3. Perform a rough weighing on a tray balance before actual weighing, ensuring that the load does not exceed the capacity. 4. Use the same balance for all weighing tasks in the experiment; it is incorrect to switch balances midway. 5. Do not pick up heavy objects with your hands directly. 6. It is strictly prohibited to weigh chemicals directly on the balance pan. Do not weigh substances that are too cold or too hot, or those that are prone to absorbing moisture or evaporating; weigh them in a sealed container after covering it. 7. Once weighing is complete, turn off the power and cover the balance lid.

1) The balance room must be kept highly clean. When cleaning it, it should only be wiped with a damp cloth; a soaked mop must never be used for mopping the floor. Do not bring wet items inside to avoid increasing humidity. (2) The outside of the balance should be cleaned at all times, at least once a week. Generally, a soft brush, fleece cloth, or suede can be used to remove dust from the balance. When cleaning, be careful not to touch the balance components with your hands, as moisture remaining on these components can cause metal oxidation and errors in measurements. Therefore, fine-gauge sewing gloves or extremely thin rubber gloves should be worn, and the operation should be carried out along the metal’s smooth surface texture to avoid damaging the surface finish of the parts. To prevent the accumulation of harmful substances, the base should be cleaned immediately after each weighing. The working edges of the agate blades on the crossbeams must be kept highly clean; a chamois should be used to slide back and forth along these edges in order to clean them gently. The agate surfaces of the middle blade holder and the edge blade pads, as well as all the agate bearings, should also be cleaned with a chamois. The walls of the damper can be cleaned with a soft brush and suede, after which a 20–30x magnifying glass is used to check for any remaining fine particles. (3) Near the electronic analytical balance and weights, a certification of calibration for the actual error of those balance and weights should be kept, so as to obtain the necessary accurate data during measurements. (4) A desiccant should be placed inside the balance glass frame; colored silica gel is preferred, and care should be taken to replace it. (5) When moving an electronic analytical balance, the beam, lifting lugs, and weighing pan must be removed.