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Second, the zero adjustment <br> <br> power, gently turn the knob, when the projection ruler stability, "0" line are coincident on the center of the viewing screen and the scale score line, if overlapped, dial tone screen Pull rod, move the screen to adjust the position; · If the screen moves to the end of the line and also adjust to less than zero, you need to adjust the balance on the beam.
Third, weighing object <br> <br> using an analytical balance weighing object before the object should be called the first rough on the scales, then the objects to be weighed in the balance left to release the disc, said the slightly larger than the rough quality of the enamel Put the code in the center of the right disk, slowly open the lifting knob and change the weight according to the moving direction of the scale, until the weighing object is not more than lg larger than the quality of the silicon code, rotate the index disk to add or subtract the circle code until the engraved line on the screen A reading on the scale projection coincides.
Fourth, readings
When the scale projection on the light screen is stable, it is ready to read, first read the silicon code value in the balance plate, then read the circle code value, and finally read the scale value. 
Fifth, after the inspection
After weighing, record the quality of the object, remove the object, return the weight to the original position in the box, return the coil to the zero position, and close the side door. Unplug the power plug and cover the balance cover.
Daily maintenance of electronic balances
First, said the former <br> <br> check before using an electronic balance, we should first check whether the balance is placed horizontally, the mechanical device is overweight in the zero position, circle the code is complete, the two tray is empty, and the balance with a brush Clean up the plate.