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（圖2）。光柵有兩塊，一為固定光柵，另一為裝在表盤軸上的移動光柵。加在承重臺上的被測物通過傳力杠桿系統(tǒng)使表盤軸旋轉(zhuǎn)，帶動移動光柵轉(zhuǎn)動，使莫爾條紋也隨之移動。利用光電管、轉(zhuǎn)換電路和顯示儀表，即可計算出移過的莫爾條紋數(shù)量，測出光柵轉(zhuǎn)動角的大小，從而確定和讀出被測物質(zhì)量。
參數(shù)
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
電容式加速度傳感器 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，另一塊可移動。在承重臺加載被測物時，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。測出頻率的變化即可求出承重臺上被測物的質(zhì)量。電容式傳感器耗電量少，造價低，準(zhǔn)確度為1/200～1/500。
