Precision Scales with Electromagnetic Force Compensation EMK
| | Analytical Scale
LB-MA | Precision Scale
LB-MW | Precision Scale
LB-MC | Precision Scale
LB-MK |
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| Measurement Principle |
Electromagnetic Force Compensation |
| Calibration |
Internal Calibration |
| Max (g) |
120 | 250 | 310 |
520 | 1,200 | 2,100 |
520 | 720 | 1,000 | 1,200 |
4,200 | 5,200 | 6,200 |
| Readability, d (g) |
0.0001 |
0.001 => 1 mg |
0.001 => 1 mg |
0.01 |
| Platter Size (mm) |
Ø 80 mm |
Ø 110 mm |
Ø 110 mm |
Ø160 mm |
| Repeatability (g) |
0.0001 |
0.001 |
0.001 |
0.01 |
| Linearity (g) |
± 0.0003 |
± 0.002 | 0.003 | 0.005 |
± 0.002 | 0.002 | 0.003 | 0.003 |
± 0.03 |
| Stabilization Time (sec.) |
≤ 4 |
≤ 2 | ≤ 3 | ≤ 3 |
≤ 2 | ≤ 2 | ≤ 3 | ≤ 3 |
≤ 2 | ≤ 3 | ≤ 3 |
How is a Precision Scale Constructed?
Precision scales typically consist of several components that work together to provide accurate measurements. The main components of precision scales are:
Load Cell
The load cell is the heart of every precision scale. It consists of a strain gauge connected to a metal alloy. When a weight is placed on the scale, the strain gauge stretches, changing the electrical resistance. The load cell converts this change into an electrical signal processed by the scale's electronics.
Platter
The platter is the surface on which the object to be weighed is placed. It can be made of various materials such as stainless steel, glass, or plastic and has a smooth surface for accurate weighing.
Electronics
The electronics of precision scales include components like microcontrollers, analog-to-digital converters (ADCs), and displays. A microcontroller controls the operation of the scale and processes signals from the load cell and the ADC. The ADC converts the load cell's analog signal into a digital signal that the microcontroller can process. The display shows the weight of the object on the scale.
Calibration Weights
Precision scales need to be calibrated regularly to ensure accurate measurements. Calibration weights are used to calibrate the scale to a known mass and verify the accuracy of the scale.
Housing
The housing of the precision scale protects its components from dirt, dust, and other environmental factors. It can be made of various materials, including plastic and stainless steel.
