1. Randomly add weights
In the use of a precision jewelry scale, weighing should be properly estimated to add weights; after turning on the precision jewelry scale, according to the direction of the pointer offset, increase or decrease the weights until the projection screen appears to be stationary to 10 mg within the readings.
2, Fast rotary switch
In the use of analytical precision jewelry scales rotary switch knob must be uniformly slow, too fast and easy to make the blade of the knife sharp contact and damage to precision jewelry scales, but also due to sharp shaking caused by weighing errors.
3. Read the data in the wrong place
Weighed in the jewelry in 10 mg or less, which the projection screen can read out; more than 10 mg to 990 mg can rotate the circle weights – indicator disk knob, to increase or decrease the circle shape code (to be gently picked and place), 1 gram to 200 grams of weights with weights in the box of tweezers out of the need to select the value of the value of the use.
4. The object to be weighed is placed on the edge of the scales
The object to be weighed should be placed in the middle of the weighing pan of the precision jewelry scale, not exceeding the maximum load of the precision jewelry scale.
5, Weighing data is not stabilized before starting the next step
If the precision jewelry scale is working, do not put jewelry or add weights on the weighing pan, open and close the door of the precision jewelry scale, or other actions that cause vibration of the precision jewelry scale.
6. Open the front of the windshield to pick up and place jewelry.
Please try not to open the front door of the precision jewelry scale. Pick and place weights and weigh objects through the left and right doors, gently close and open the window.
7, Arbitrarily placed in the weighing jewelry on the scale or the bottom plate
Precision jewelry scales to keep it clean and dry can not be placed directly on the sample weighing pan and the base plate. Especially wet or dirty items must be placed in the disk, weighing bottle and crucible weighing. Hygroscopic or corrosive gas substances must be placed in a closed container weighing.
8, Too hot or too cold jewelry placed on the scales
Can not be too hot or too cold items placed on the weighing pan; items in the weighing before the precision jewelry scale indoor dryer to be placed in 15 to 30 minutes, such as being weighed in the temperature of the items and the temperature of the precision jewelry scale room is basically the same, and then weighed.
9. Holding weights by hand
Weights must be taken with weights tweezers, put back in the original place after each use, and not put the weights on the base plate and desktop of the precision jewelry scale.
