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

光柵式傳感器利用光柵形成的莫爾條紋把角位移轉(zhuǎn)換成光電信號(hào) 。光柵有兩塊，一為固定光柵，另一為裝在表盤軸上的移動(dòng)光柵。加在承重臺(tái)上的被測(cè)物通過(guò)傳力杠桿系統(tǒng)使表盤軸旋轉(zhuǎn)，帶動(dòng)移動(dòng)光柵轉(zhuǎn)動(dòng)，使莫爾條紋也隨之移動(dòng)。利用光電管、轉(zhuǎn)換電路和顯示儀表，即可計(jì)算出移過(guò)的莫爾條紋數(shù)量，測(cè)出光柵轉(zhuǎn)動(dòng)角的大小，從而確定和讀出被測(cè)物質(zhì)量。

參數(shù)

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

它利用電容器振蕩電路的振蕩頻率f與極板間距d 的正比例關(guān)系工作(圖6 )。極板有兩塊，一塊固定不動(dòng)，另一塊可移動(dòng)。在承重臺(tái)加載被測(cè)物時(shí)，板簧撓曲，兩極板之間的距離發(fā)生變化，電路的振蕩頻率也隨之變化。測(cè)出頻率的變化即可求出承重臺(tái)上被測(cè)物的質(zhì)量。電容式傳感器耗電量少，造價(jià)低，準(zhǔn)確度為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