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Load Cell Technical Specification
Dec 13, 2017

Load Cell Technical Specification

Load cell technical parameters are rated load, allowable use of load, limit load, sensitivity, nonlinearity, repeatability, allowable temperature, 0 point temperature effect, output sensitivity coefficient temperature effect, impedance, input impedance, insulation impedance, permissible maximum excitation voltage, lag, creep and creep recovery, seal protection grade, Cable length.

1.Rated Load

The maximum axial load that the load cell can measure within the specified specification range. But the actual use, generally only use the quantitative process of the 2/3~1/3.

2.Allow the use of load (or safety overload)

 The load cell allows the maximum axial load to be applied. Allow work to be overloaded within a certain range. Generally 120%~150%

3.Limit load (or limit overload):

The maximum axial negative that the load cell can withstand without losing its ability to work.This means that when work exceeds this value, the load cell will be damaged.

4.Sensitivity

The ratio of the output increment to the added load increment. The MV is usually rated output per 1V voltage input.

5.Nonlinear

This is the parameter that represents the exact degree of the corresponding relationship between the voltage signal and the load of the sensor output.

6.Repeatability:

Repetitive representations of the sensor when the same load is repeated under the same conditions, the output value can be repeated consistent, this feature is more important, can reflect the quality of the sensor. National standards on the repetition of the error of the expression: repeatability error can be compared with non-linear simultaneous measurement of the same test point 3 of the actual output signal value between the maximum difference.

7.Allowed to use temperature:

Specify the occasions where this weighing sensor can be applied. Normal temperature sensors are generally labeled as: -20℃-+70℃. The high-temperature sensor is labeled: -40℃-250 ℃. Temperature compensation Range: This sensor has been compensated in this temperature range during production. Normal temperature sensors are generally labeled as -10℃-+55℃.

8.Zero point temperature effect (commonly known as 0 point drift):

The stability of 0 points of the sensor is characterized by the change of ambient temperature. In general, the drift produced in the range of 10 ℃ is the unit of measurement.

9.The temperature effect of the output sensitivity coefficient (commonly known as coefficient drift):

This parameter characterizes the stability of the sensor output sensitivity when the ambient temperature changes. In general, the drift produced in the range of 10 ℃ is the unit of measurement.

10.Output Resistance:

Under the rated technical conditions, the output resistance value of the Sensor + s [i+ i]

11.Input resistance:

The resistor value of the excitation end of the weighing sensor, E+ E- [V+ V-] 

12.Insulation Impedance:

The sensor's circuit part and the elastic beam between the insulation resistance, the greater the better, the size of the insulation resistance will affect the performance of the sensor. When the insulation impedance is below a certain value, the bridge will not work properly. Recommended excitation voltage: generally 5~12 volts. Because of the general weighing instrument inside the voltage regulator DC power supply is 5 or 12 volts.

13.Maximum excitation voltage allowed:

The maximum acceptable voltage of the sensor is not recommended for maximum excitation voltage.

14.Hysteresis:

The popular meaning of lag is: the level of loading and unloading the load in turn, corresponding to each stage of load, ideally should be the same reading, but the facts are consistent, the degree of inconsistency with the lag error of this indicator.

In the national standard, the lag error is calculated: The maximum difference between the arithmetic average of the actual output signal value of 3 trips at the same test point and the arithmetic average of the actual output signal value of 3 trips (MV).

15.Creep and creep recovery:

It is required to test the creep error of the sensor from two aspects: one is creep: in 5-10 seconds time without impact add the rated load, after the load 5-10 seconds reading, then in 30 minutes at a certain time interval to note the output value. The second is creep recovery: Remove the rated load as quickly as possible (within 5-10 seconds), immediately after unloading in 5-10 seconds, and then write down the output value at a certain interval in 30 minutes.

16.Seal Protection Grade:

IP65,IP66,IP67,IP68: Weighing sensor's dustproof and waterproof performance index.

17. Cable Length:

Factory standard configured cable length. It is better not to increase and decrease without authorization.