What can go wrong if you use a balance and ignore the one to to two and measure directly

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What can go wrong if you use a balance and ignore the one-to-to-two and measure directly

Whistleblowing|2012-09-16 12:43Asked by: liang 699|Views: 8.

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The balance may be unbalanced, measured.

The causes of balance imbalance are usually reflected in the following aspects: the balance is not level; Caused by the weighing pan spilling the weighing object; Caused by the unequal weight of the suspension system on both sides of the balance arm; Balances are unequal arm (for equal arm balances).

For the above reasons, the following adjustment methods are usually used to bring the balance to a balanced state.

When the balance is not level, simply adjust the two adjustment feet at the bottom of the front of the balance. Note that you should observe the leveling mechanism of the balance while adjusting until the horizontal bubble is in the center of the standard ring, and tighten the nut of the adjustment foot.

The scattered objects on the weighing pan include some dust, etc., which should be cleaned in time to ensure that the zero point of the balance is correct, otherwise, it is easy to bring weighing errors.

If the balance is unbalanced in the case of the balance arm, if the zero point deviates from the standard graduation line by several indexes, the zero trimmer of the balance should be adjusted to solve the problem, and the general zero trimmer can be adjusted by 10 indexes; If the zero point of the balance is very different, the two balance stones on the balance beam should be adjusted to solve the problem, and the adjustment should be observed while adjusting until it is adjusted. Note that when adjusting the balance screws (balance stones), the zero trimmer lever of the balance should be placed in the middle position (i.e., the left and right adjustments are approximately equal).

When the balance is not equal to the arm, the arm ratio of the balance beam should be adjusted first, that is, when the balance is adjusted to the equal arm, and then the unbalanced state of the balance is adjusted. This requires us to use a small metal gasket with holes to add to a light weighing pan until it is basically balanced, and then take out the small metal gasket, place it on the screw in the inner cylinder of the balance damping, and fasten it with a fixing nut, or it can be installed at the bottom of the balance weighing pan to fix it. In short, it should be placed in a dark place that does not affect the beauty of the balance, and the balance should be fine-tuned so that the zero point of the balance is at the standard graduation line.

When measuring, add weights first to the principle of large and then small, when adding the smallest weight balance to the right, take out the smallest weight balance to the left, and then adjust the free weight to balance the balance.