How to adjust the level bubble of precision balance

Precision balances will produce measurement errors due to uneven placement during the weighing process. The higher the weighing accuracy, the greater the error. For this reason, most precision balances provide the function of adjusting the level. There is a bubble level at the back of the precision balance. The level bubble must be located in the center of the liquid chamber, otherwise the weighing will be inaccurate. After adjustment, try not to move it, otherwise, the level bubble may shift and need to be readjusted.

Precision balances generally have 2 leveling bases, usually at the back and some at the front. The balance can be leveled by rotating the two leveling bases.

1. Rotate the left or right leveling base, and adjust the vial to the center line of the liquid chamber first.

Rotating a left or right leveling base independently is actually adjusting the inclination of the balance, and the level bubble can definitely be adjusted to the central line.

The key is which one to adjust to level the base. Beginners can judge in this way, first manually tilt the balance of the electronic scale, so that the level bubble reaches the central line, and then look at the leveling base, which one is higher or lower, adjust the height of one of the leveling bases, and the level bubble can move to the central line.

NOTE: Do not proceed to the next step until the central line is reached.

2. Rotate the two leveling bases at the same time, the amplitude must be the same, both must be clockwise or counterclockwise, so that the vial moves on the central line, and finally moves to the center of the liquid chamber.

If the leveling base is rotated clockwise or counterclockwise at the same time, the inclination of the balance will remain unchanged, so that the vial will not deviate from the central line. As long as the rotation direction is correct, it will definitely reach the center of the liquid chamber.

Rotate clockwise or counterclockwise at the same time: Rotate the leveling base with both hands at the same time (one hand facing the chest, the other hand facing the chest, in opposite directions, generally rotating the base clockwise or counterclockwise at the same time).

Direction problem: It is not easy for beginners to judge the direction. Manually raise the base or another stand to move the blister toward the center, then observe the position of the leveling base to see if it needs to be adjusted higher or lower.

Note that in the second step, the amplitude of both hands must be the same. If not, the bead will be offset from the centerline. If it drifts, just start over from the first step. After proficiency, it usually takes 1-2 minutes to level the bubble level of a precision balance.