赛多利斯 PR 6251传感器

500 kg… 16 t L/LA/LE/LAC

1. Easy mounting

2. Stainless steel construction

3. Hermetically welded sealed, IP68 (depth of 1.5m for 10,000 hrs.), IP 69K

4. Ex-version available (LE)

5. Direct 4… 20 mA output (LA)

6. Only 25/35 mm installation height

7. Application - Level control for liquid and bulk materials

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（图2）。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

Technical Data L/LE LA/LAC

Accuracy class 0.5 0.5 %

Minimum dead load lowest limit of specified measuring range Emin 0 5 % Emax

Rated capacity highest limit of specified measuring range Emax s. table s. table

Safe overload upper limit for measurements Eu 150 120 % Emax

Destructive load danger of mechanical destruction Ed 300 300 % Emax

Rated output relative output at nominal load Cn 2.0 16 mA mV/V

Tolerance on rated output permissible deviation from rated output dc < 4 < 4 % Cn

Tolerance on zero signal load cell output signal under unloaded condition Smin < 4 4 mA % Cn

Repeatability error max. change in load cell output εR < 0.1 < 0.1 % Cn

for repeated loading

Creep, during 30 min max. change in load cell output dcr < 0.1 < 0.1 % Cn

under nominal load

Non-Linearity max. deviation from best straight line dLin < 0.25 < 0.25 % Cn

through zero

Hysteresis max. difference in load cell output dhy < 0.15 < 0.15 % Cn

when loading from zero to nominal load

and unloading back to zero

Temperature effect on zero max. change of Smin/10 K D T over BT TKSmin < 0.15 < 0.15 % Cn/10K

referred to Cn

Temperature effect on output max. change of C /10 K D T over BT TKc < 0.1 < 0.1 % Cn/10K

referred to Cn

Input impedance between supply terminals RLC 645 ± 60 - ￥

Output impedance between measuring terminals RO 635 ± 15 - ￥

Insulation impedance between measuring circuit and housing 100 VDC RIS > 5,000 - M￥

Recommended supply voltage to hold the specified performance Bu 4… 24 20… 28 V

Max. supply voltage permissible for continuous operation Umax 25 25 V

without damage

Nominal ambient temp. range to hold the specified performance BT -10… +70 -10… +55 ° C

Usable ambient temp. range permissible for continuous operation BTu -30… +95 -30… +70 ° C

without damage

Storage temperature range Transportation and storage BTl -40… +95 -40… +80 ° C

Permissible eccentricity permissible displacement from nominal load line Sex 10 10 mm

Vibration resistance resistance against oscillation (IEC 68-2-6 Fc) - 20 g, 100 h, 20 g, 100 h,

10… 150 Hz 10… 150 Hz

Air pressure effects influence of ambient air pressure on Smin PKSmin ≤ 20 ≤ 20 g/kPa

Nominal deflection max. elastic deformation under nominal load snom up to 2 t <0.1/ up to 2 t <0.1/

16 t

电容式加速度传感器 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。