What are the general requirements for the balance room of laboratory precision electronic analytical balance?

What are the general requirements for the balance room of the precision electronic analytical balance in the laboratory? Professionals from Tianjin Tianma Instruments pointed out that the precision electronic analytical balance in the laboratory is to connect the weighing pan with the energized coil and place it in a magnetic field. When the object to be weighed is placed on the weighing pan Finally, due to the downward gravity, an electromagnetic force will be generated on the coil, which is equal in magnitude and opposite to the gravity. At this time, the sensor outputs an electrical signal, which is rectified and amplified to change the current on the coil until the coil returns, and the current intensity is proportional to the gravity of the object being weighed. And this gravity is just produced by the mass of the substance, and the resulting electrical signal will display the mass of the object being weighed after passing through the analog system.

The installation process of precision electronic analytical balance is as follows:

1. Remove the outer packaging of the precision electronic analytical balance , such as a wooden box or carton, and store the outer packaging and shockproof items for reuse.

2. Check and analyze whether the balance host and parts are complete and whether the appearance is good. Dust removal and cleaning of the precision electronic analytical balance host and parts.

3. Install the precision electronic analytical balance host, and adjust the precision electronic analytical balance to a horizontal state by adjusting the leveling feet at the bottom of the thousandth balance (you can observe the leveling device in the thousandth balance weighing room).

4. Install the moving parts such as the weighing ring and weighing pan of the electronic analytical balance in place, and some weighing pans need to be rotated to fix them. Loosen locking devices such as transport fixing screws or key buttons.

5. Adjust the external power selection button of the precision electronic balance to the local power supply voltage. Insert the external power supply and plug into the external power socket, and turn on the power switch of the electronic analytical balance to observe whether the display of the electronic analytical balance is normal. If the display is normal, preheat according to the requirements of the manual.

So, what are the general requirements for the balance room of the electronic analytical balance , let's listen to the interpretation of professionals.

Professionals pointed out that the balance room of precision electronic analytical balance generally has the following requirements:

Precision electronic analytical balance is a precision instrument, which needs to be installed in a special precision electronic analytical balance room. The precision electronic analysis balance room should be kept away from the source of vibration and heat, and isolated from the environment that produces corrosive gas. The room should be clean and dust-free. The indoor temperature is preferably 18-26°C, and it should be relatively stable. Keep the room dry, and the relative humidity should generally not exceed 75%.

The precision electronic analytical balance needs to be placed on a solid cement platform, and the table can be stretched with a rubber cloth to prevent slipping and shock absorption when conditions permit. The position where the precision electronic analysis balance is placed should avoid direct sunlight, and curtains should be hung to block the light, so as to avoid uneven heating on both sides of the precision electronic analysis balance , deformation of the beam, or temperature difference in the precision electronic analysis balance box, forming airflow, thus affecting the scale. quantity.

Do not store or transfer volatile and corrosive reagents (such as concentrated acid, strong alkali, ammonia, bromine, iodine, phenol and other organic reagents, etc.) in the precision electronic analysis balance room. If you want to weigh these substances, it is advisable to use glass Seal the container for weighing.

Weighing is a very meticulous work, and the precision electronic analysis balance room should keep quiet and no noise. Items not related to weighing should not be brought into the precision electronic analysis balance room.

Do not bring wet utensils into the precision electronic analysis balance room. When the aqueous solution needs to be weighed, it should be weighed in a well-sealed container (such as a narrow-necked pycnometer, a weighing burette, etc.), and the weighing time should be shortened as much as possible.