Ohaus electronic balance use and precautions

First, the Ohaus electronic balance uses:

1. Preheating: The preheating of the Ohaus electronic balance before use is to determine the accuracy of the results. Therefore, the user must turn on the power before using the balance, and then turn on the switch of the electronic balance. The warm-up time is preferably half an hour, and normal operation and use can be performed after half an hour.

2. Calibration of the Ohaus electronic balance: The first thing to talk about here is the calibration of the electronic balance. Since the g acceleration g is different in different places, especially at different latitudes , if we change the working place, we must first calibrate , otherwise the accuracy of the test results are not so accurate.

Second, the Ohaus electronic balance use notes:

1. The weighing person must face the middle of the balance. The entire weighing of an experiment can only be done with the specified balance and weight, and the balance cannot be replaced midway.

2 , weighing objects and weights can only be picked up by the side door. When weighing, the front door cannot be opened.

3. The electronic balance is not allowed to pick up the weighing object and weight before opening. Turn the balance on or off to be gentle. Do not use excessive force to avoid damage to the knife edge.

4 , powdery, moist, corrosive substances must not be placed directly on the weighing pan, must be used in dry, clean containers ( weighing bottles, bottles, etc. ) in order to weigh.

5 , weighing and weight should be placed in the center of the weighing pan. The weighing object shall not exceed the maximum load of the balance, and the external dimensions shall not be too large.

6. When using a mechanical overweight device, the action of rotating the reading index disk should be gentle. Estimate the quality of the weighing object, and select the weight according to the principle of “from large to small, intercepted in the middle”. First open the balance for observation. When the deflection of the pointer is within the range of the sign, the balance can be fully turned on.

7. When reading, close the door of the balance to prevent the swing of the pointer from being affected by the air flow.

8. At the end of the weighing, close the balance, take out the weighing and weight, and return the index plate to the “ 0.00 ” position. Close the balance door, cover the balance cover, and fill in the registration card.

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