How to use a pallet balance needs to be introduced Don t be brief. A good answer will be given more

The use of pallet balances.

Screw yard scale, pointer ruler with tray.

The adjusting screws are balanced, and the object code is separated from the left and right.

Take the code with tweezers, first large and then small in mind.

The drug cannot be put directly, and it must be restored after weighing.

Explanation: 1. Screw yard scale, pointer ruler has tray: these two sentences say the main components that make up the tray balance: screws, yards, scales, pointers, and trays (divided into left and right).

2. Adjust the screw to achieve balance: It means that before weighing, you should first check whether the balance is in a balanced state. If it is unbalanced, the screws should be adjusted to balance it.

3. The object code is separated from the left and right:"things"refers to the substance to be weighed; "yards"Refers to the weight of the scale. This means that the object to be weighed should be placed in the left plate and the weight should be placed in the right plate.

4. Use tweezers to pick up the code: This sentence means that when taking the weight, you must not take it by hand, but must use tweezers to pick it up.

5. First big and then small in mind: It means that when adding weights, you should first clamp the weights with large weights, and then clamp the weights with small weight (and then move the code).

6. The drug can not be placed directly: it means that the drug to be weighed cannot be placed directly on the tray (association: you can put a piece of paper of the same size on each of the two trays, and then put the weighed drug on the paper, and the wet or corrosive drug must be weighed in a surface dish or beaker).

7. Restore after weighing: It means that after weighing, the weight should be put back into the weight box, and the code should be moved back to zero, so that the balance can be restored to its original state.

1. Instrument introduction.

Shelf tray drug balance base, hanger, container tray, bracket, lever, weight box (1kg g g og g g g 1).

2 how to use.

3. Adjust the balance.

Place the rack tray medication balance horizontally, then place the two containers on the two tray support racks of the rack tray drug balance base, and adjust the nuts at both ends of the lever so that the finger is aligned with the midline.

4. Weighing. When weighing, put weighing paper in two containers to avoid contamination of the reagent, and after confirming the balance, abide by the principle of left object and right code for weighing.

The balance should be placed horizontally, and the game code position "0" should be leveled again.

Do not move the balance of the scale, and it is not feasible to switch the two discs.

Extract weights with tweezers, objects, yards left and right two plates.

Move the code to see the pointer, and the pointer points to "0" to indicate balance.

The indication contains two values, which are added together.

Do you think there are any improvements to the above slip of the tongue? What else do you think should be paid attention to when using a balance??? Thank you!! It is the estimation of the balance, and the balance nut standard moves and then pay attention to it :)

Here's how to use a pallet balance:1. Place the tray balance on the water platform.

2. Use tweezers to dial the code to the "" tick line at the left end of the ruler.

3. Adjust the balance nut on the right side, and when adjusting, it depends on the position of the pointer.

4. The pointer is located on the left side of the index dial, and the balance nut should be adjusted to the right, and vice versa.

5. The pointer is located at the midline of the index dial, and the balance is measured at this time.

6. Place the measured object in the left disk, and estimate the mass of the measured object.

7. According to the estimate, use tweezers to place weights in the tray on the right side from large to small.

8. Appropriately adjust the position of the traveling code so that the beam of the pallet balance is in a balanced state.

9. The mass of the measured object = the mass of the right weight + the reading of the traveling code.

Use pallet balances correctly.

The methods are: 1. Leveling. Water Flat: Place the tray balance on a level tabletop.

Return to zero: Place the code on the "0" tick mark at the left end of the ruler. (Use the balance to return to zero) adjust the balance of the beam:

Adjust the balance nut (left sink right shift, right sink left shift) so that the finger is aligned with the index dial ** scale mark or do an equal swing around the index dial ** scale mark, then the beam is balanced. (After the balance is adjusted, the balance nut can no longer be adjusted, and the left and right balance plates cannot be interchanged.) ）

2. Weighing: Left object: estimate the mass of the measured object, and put the measured object in the left plate Right weight: according to the estimated mass of the measured object, use tweezers.

Add or subtract weights to the right disc from large to small

Adjust the position of the vernier on the crosshead ruler until the balance is back in balance.

Correct reading: put right (left weight right): m object = m weight + m swim (read left side of the code); Misplaced: m object = m weight m swim.

3. Weighing is completed. Use tweezers to put the weights back into the weight box one by one (return to zero).

Pallet balances are generally used to measure the mass of objects, but there are many other wonderful uses for balances. It can be used not only to measure the mass of an object, but also to measure the density of solids and liquids, the volume of solids and liquids, the volume of containers, the buoyancy of objects immersed in liquids, etc.

Precautions for using pallet balances are as follows:

1. Before use, the zero point should be adjusted, the method is: first move the code to the "0" scale, and then adjust the balance nut at the bottom of the tray to balance the balance.

2. When weighing, the measured object should be placed on the left plate, and the weight should be placed on the right plate. The total mass of the weight in the right disc plus the mass of the yard equals the mass of the object to be measured.

3. Use tweezers to take the weight, and you can't hold the weight directly by hand. Add the weight with the most mass, then the weight with the small mass, and finally move the weight until the balance is balanced.

Balances (pallet balances):

1) The purpose of the balance: to measure the mass of an object.

2 how to use.

Place the balance on the water platform and place the code at the zero line at the left end of the scale;

Adjust the balance nut so that the pointer points to the center line of the index plate, and then the beam is balanced;

Place the object on the left plate, add or subtract weights to the right plate with tweezers and adjust the position of the bar on the scale until the beam is balanced. At this time, the total mass of the weights in the disk plus the scale value of the yard on the scale is equal to the mass of the measured object. 3. Weighing is completed.

Use tweezers to put the weights back into the weight box one by one (return to zero).

1.To be placed in a horizontal place. The game code should be reset to zero.

2.Adjust the balance nut (the nut at both ends of the balance) to adjust the zero point until the finger is aligned with the ** scale mark. 3.

The left tray is placed to weigh the object, and the right tray is placed with weights. According to the properties of the weighed object, it should be placed on glassware or clean paper, and the mass of the glassware or paper piece should be weighed on the same balance in advance, and then the substance to be weighed should be weighed. 4.

The added weights are gradually reduced from the maximum value of the estimated weighed object. Pallet balances can only be weighed to the gram. Add or subtract weights and move the yard on the ruler until the pointer is aligned with the tick mark again.

5.Objects that are too cold or too hot should not be weighed on a balance. It should be placed in the dryer until room temperature before weighing.

6.The mass of the object = weight + yard 7Tweezers must be used to take the weight, and the removed weight should be placed in the weight box, and after weighing, the code should be moved back to the zero point.

8.When weighing dry solid pharmaceutical products, a sheet of paper of the same quality should be placed on each of the two trays, and then the drug should be weighed on the paper. 9.

Drugs that are prone to deliquescent must be weighed in glassware (e.g., small beakers, surface dishes). 10.

If the weight is rusty, the measurement result is small; If the weight is worn, the measurement result is too large.

Precautions for use:1Move the code to 0 tick mark in advance and adjust the balance nut so that the balance is balanced left and right. 2.

Put the weight on the right and the object on the left. 3.Weights should not be held by hand, but should be picked up with tweezers.

When using the balance game, the code cannot be moved by hand. 4.Objects that are too cold or too hot should not be weighed on a balance.

It should be placed in the dryer until room temperature before weighing. 5.The weights should be from large to small to save time.

6.During the weighing process, the balance nut should not be touched again.

1.Place the balance on a level table.

2.Move the balance nut and yard to balance the balance.

3.Place the object to be measured on the left disk.

4.Place the weights on the right disc with tweezers until the least mass weight is added or subtracted to make the balance balance.

5.Correct reading.

That's pretty much it.、I'm learning this.、That's what the teacher said.

a .It's so troublesome, and I hated it when I was in school.

1. Place the tray balance on the horizontal tabletop and use tweezers to dial the code to the left zero position of the ruler.

2. Next, adjust the balance nut so that the pointer points to the ** scale mark of the index dial.

3. The object must be placed on the left plate of the tray balance, and the weights should be placed from large to small, and attention should be paid to the process of picking and placing the weights with care.

4. When there is no smaller weight to add, then move the code to make the pointer point to the first tick mark of the index dial again.

5. The mass of the object is divided into two parts, first the base weight of the right disc weight is 40 grams, then the value on the ruler is grams, and the total should add up to grams.

6. After the experiment, take back the weight and burn the code into the box, remove the object, return the code to the zero position on the left, and arrange the experimental instruments.

The structure of the pallet balance: the pallet balance is mainly composed of the base sail, the pallet rack, the tray, the pointer, the index plate, the ruler, the traveling code, and the balance nut.

Weighing 500 grams of pallets, the general induction is one-fifth of a gram, its ruler has 25 grids, every time the yard moves to the right on the ruler, it is equivalent to adding one-fifth of a gram of weight in the right support of the letter plate. It can also be estimated to a tenth of a gram based on the middle position of the code in a grid.

How to use a pallet balance:

1. Put the balance on the desktop, wipe the tray clean, put it on the corresponding tray rack according to the number, dial the code to the leftmost zero position of the ruler before weighing, adjust the leveling screw, and make the pointer just align with the red line of the dial when it stops swinging.

2. After the balance is leveled, put the object to be weighed in the left plate (remember to put the weighing paper or glassware), and use the stainless steel tweezers to add the weight from large to small in the right plate, when the weight is still unbalanced when the weight is increased or decreased to the minimum mass, the code can be moved to make it balanced, and the mass of the object is equal to the sum of the mass of the weight and the mass referred to by the scale of the code.

3. The balance should be placed in a dry and clean place, and the weighing object should not exceed the maximum capacity of the balance. When weighing, use tweezers to take weights, not directly by hand. For a long time, there is no need to add objects under the tray to fix.

putPallet balancesPlace on the water platform and useTweezersDial the code to the "0" tick mark at the left end of the ruler.

2. Adjust the balance nut on the right side, when adjusting, it is necessary to see the position of the pointer, if the pointer is located on the left side of the index plate, the balance nut should be adjusted to the right, otherwise to the left, so that the pointer is located at the center line of the index plate, and the beam is balanced.

3. Put the object on the side into the left plate, and estimate the mass of the measured object, according to the estimation, use tweezers to place the weight in the tray on the right side from large to small, and adjust the position of the code appropriately, so that the beam of the pallet balance is in a balanced state again.

4. When the tray balance is balanced, we can read the mass of the measured object, the mass of the measured object is equal to the mass of the missing right key reading weight plus the reading of the code is the mass of the measured object.

5. After measuring the technique, we need to use tweezers to put the weight into the weight box, and arrange the tray balance to restore it to its original state.