Veidt Weighing is a Analytical Balance factory in china. An analytical balance is a laboratory instrument capable of accurately measuring small mass objects, with weighing accuracy typically reaching 0.1mg (0.0001g) or even higher. Compared with traditional scales, analytical balances have higher sensitivity and accuracy, and can accurately measure at the trace level.

Working principle of electronic analytical balance

Modern analytical balances mainly use the principle of electromagnetic force balance:

Measuring mass by balancing electromagnetic force and gravity
When the sample is placed on the weighing plate, the sensor detects a change in position
The control system generates corresponding electromagnetic force to restore the balance of the balance
The required electromagnetic force can be measured to determine the sample quality

Classified by accuracy:

Precision analytical balance (0.1mg accuracy)
Semi micro balance (0.01mg accuracy)
Microbalance (0.001mg accuracy)
Ultra micro balance (0.0001mg accuracy)

Classified by structure:

Top loading type
Bottom loading type
suspended

Key performance parameters

Maximum weighing range: ranging from tens of grams to several thousand grams
Readability/Resolution: Typically 0.1mg-0.01mg
Repeatability: Consistency of results obtained from multiple weighings under the same conditions
Linear error: the deviation between the actual value and the theoretical value
Stable time: the time from loading the sample to displaying stable results
Calibration methods: internal calibration, external calibration, or automatic calibration

Special functions of analytical balances

Automatic calibration: Built in weight automatic calibration function
Dynamic weighing: suitable for weighing unstable samples
Density measurement: Combined with density components, solid and liquid densities can be measured
Statistical calculation: automatic calculation of mean, standard deviation, etc
Multi user management: management of user accounts with different permissions

The correct method of using an analytical balance

Environmental requirements:
Avoid vibration, airflow, and temperature fluctuations
Maintain level (adjust with built-in level)
Ideal temperature range 15-25 ℃, humidity 45-60%

Operation steps:
Power on preheating (usually 30 minutes)
Perform calibration (before daily use)
Use specialized weighing containers
Avoid direct contact with the weighed object by hand
Close the windproof door for precise weighing

Weighing techniques:
Use the peeling function
Temperature equilibrium of symmetrical quantities
Avoid the influence of static electricity (anti-static devices can be used)
Rapid weighing of hygroscopic substances

Maintenance and Care

Daily cleaning:
Clean with a soft brush or lint free cloth
Avoid using corrosive cleaning agents
Regularly clean the windproof cover and weighing room

Regular inspection:
Check the horizontal status
Verify repeatability and linearity
Check if the windproof door is smooth

Long term discontinuation precautions:
Remove power supply
Clean and dry the weighing room
Store in a dry and dust-free environment
Regular power on inspection

Common Problems and Solutions

Unstable reading:
Check for environmental vibrations and airflow
Confirm if the balance is level
Is the sample completely stable

Display error code:
Refer to the instruction manual to identify the type of error
Overload, calibration failure, or sensor issues

Calibration failed:
Check if the calibration weights are clean
Confirm stable environmental conditions
Contact professional technical personnel

Buying Guide

Determine requirements:
Required accuracy and range
Special functional requirements
Compliance requirements

Brand and model comparison:
Main brands: Mettler Toledo, Sartorius, Shimadzu, etc
Compare performance parameters and prices
Consider after-sales service and calibration support

Accessory selection:
Special weighing tray
windshield
Data interface and software

As a fundamental equipment in laboratories, the technological progress of analytical balances is closely related to the accuracy of scientific research. Understanding the working principle and correct usage of analytical balances is crucial for obtaining reliable experimental data. With the development of technology, analytical balances will continue to evolve towards smarter, more accurate, and more convenient directions, providing stronger support for scientific research.

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