20t… 75t, Typ C3/C4/C5/C6
1. No corner adjustment necessary
2. High overload capacity
3. IP 68 (1.5 m/10.000 hrs) IP 69K (washdown cleaning)
4. Proven rocker-pin principle
5. Best overvoltage protection
6. Highest reliability
7. 100 % Maintenance free
8. Ex - version available
9. Patent pending: WO 01/18504, EP 1 227 306 A1
光栅式传感器利用光栅形成的莫尔条纹把角位移转换成光电信号 。光栅有两块，一为固定光栅，另一为装在表盘轴上的移动光栅。加在承重台上的被测物通过传力杠杆系统使表盘轴旋转，带动移动光栅转动，使莫尔条纹也随之移动。利用光电管、转换电路和显示仪表，即可计算出移过的莫尔条纹数量，测出光栅转动角的大小，从而确定和读出被测物质量。
参数
Maximum capacity highest limit of specified measuring range Emax 20 30 50 60 75 t
Max. usable load upper limit for measurements Eu 40 60 75 75 75 t
Destructive load danger of mechanical destruction Ed > 100 > 150 > 150 > 150 > 150 t
Rated output relative output signal at nominal load Cn 1 1 2 2.4 3 mV/V
for accuracy classes C4 atE max ≥ 60t, 1.5 1.5 1,5 mV/V
C5 atE max ≥ 50t
Nominal deflection max. elastic deformation under nominal load snom 0.3 0.3 0.6 0.7 0,8 mm
它利用电容器振荡电路的振荡频率f与极板间距d 的正比例关系工作(图6 )。极板有两块，一块固定不动，另一块可移动。在承重台加载被测物时，板簧挠曲，两极板之间的距离发生变化，电路的振荡频率也随之变化。测出频率的变化即可求出承重台上被测物的质量。电容式传感器耗电量少，造价低，准确度为1/200～1/500。
Accuracy class C3C4 C5 C6*
Accuracy class 0.015 0.012 0.010 0.008 % Emax
Minimum dead load lowest limit of specified measuring range Emin 0 0 0 0 % Emax
Min. LC verification minimum load cell verification interval Y 14,000 20,000 20,000 20,000
interval (vmin = Emax/Y)
Deadload Return factor for min. dead load output return Z 6,000 8,000 8,000 8,000
(DR = 1/2 Emax/Z) for Emax 50t: Z 6,000 6,000
Tolerance permissible deviation from rated output dc < 0.07 < 0.07 < 0.07 < 0.07 % Cn
on rated output
Zero output signal load cell output signal under Smin < 1.0 < 1.0 < 1.0 < 1.0 % Cn
