Electronic balance is a weighing tool that can often be seen in the laboratory. Let's take a look at how to use the electronic balance with me.
Leveling: Before turning on the balance, you should observe whether the blisters in the spirit level at the rear of the balance are located in the center of the ring. Otherwise, adjust by the foundation's anchor bolts.
Warm-up: When the balance is turned on for the first time or after a long-term power failure, it needs a warm-up time of at least 30 minutes. Therefore, under normal circumstances, laboratory electronic balance, do not cut off the power.
Weighing: Press the ON / OFF key to turn on the display; wait for the instrument to self-test. When the display shows zero, the self-test process ends and the balance can be weighed; place the weighing paper and press the Tare button on both sides of the display to tare. When the display shows zero, add the reagent to be weighed on the weighing paper the amount. After weighing, press the ON / OFF key to turn off the display.
Laboratory Electronic Balance
Notes on the use of electronic balances:
1. In order to use the balance correctly, please familiarize yourself with several states of the balance.O in the upper right corner of the display means the display is off.
The lower left corner of the display shows O: it indicates that the instrument is in standby state and can be weighed.
How to use the electronic balance
1. A diamond symbol appears in the upper left corner of the display: it indicates that the instrument's microprocessor is performing a function and no other tasks are accepted at this time.
2. The balance has been strictly calibrated during installation, so the balance cannot be moved easily, otherwise the calibration work needs to be performed again.
3. It is strictly forbidden to directly weigh without using weighing paper. After each weighing, please clean the balance to avoid contamination of the balance, affecting the accuracy of weighing and affecting the work of others.
The application rate of electronic balances is still very wide, and many laboratories also have high requirements for the accuracy of electronic balances. They also need to ensure good reliability, so that long-term measurement and use are more secure. The electronic balance verification is very critical. Only after the basic measurement verification is completed can the subsequent use be guaranteed. If you want to ensure that there are no errors in the use of the electronic balance, you must still master the basic verification procedures. The analytical balance manufacturer will introduce the specific process.
First, grading and tolerances
To do a good job of electronic balance verification, it is definitely necessary to do a good job of grading first, and then determine what the tolerance of each item is. Although many manufacturers have some verification methods of their own, because the marks are not standardized and accurate enough, some manufacturers' products may not be able to give a level. Therefore, before the test is performed, the basic classification must be done. For example, the actual scale division value is generally d. If it is not specified, the division value is e, and it cannot be directly operated when d = e.
Second, what are the aspects of metrological performance verification?
Electronic balance verification still needs to perform daily periodic verification and routine product quality inspections, such as how sensitive the balance is, and the actual discrimination power, etc., which need to be determined. Also, pay attention to the identification of the good balance in accordance with the store's maximum allowable error. It is also necessary to consider the error of the four corners of the balance, as well as the identification of the electronic balance with constant functions. Only after completing the verification in these aspects can we really guarantee a good verification result, which can also ensure the use of electronic balances.