法國原裝Sehneider傳感器XML-R250M2P25

選擇使用

對傳感器數(shù)量和量程的選擇：

    傳感器數(shù)量的選擇是根據(jù)電子衡器的用途、秤體需要支撐的點(diǎn)數(shù)（支撐點(diǎn)數(shù)應(yīng)根據(jù)使秤體幾何重心和實(shí)際重心重合的原則而確定）而定。一般來說，秤體有幾個(gè)支撐點(diǎn)就選用幾只傳感器，但是對于一些特殊的秤體如電子吊鉤秤就只能采用一個(gè)傳感器，一些機(jī)電結(jié)合秤就應(yīng)根據(jù)實(shí)際情況來確定選用傳感器的個(gè)數(shù)。

    傳感器量程的選擇可依據(jù)秤的zui大稱量值、選用傳感器的個(gè)數(shù)、秤體的自重、可能產(chǎn)生的zui大偏載及動(dòng)載等因素綜合評價(jià)來確定。一般來說，傳感器的量程越接近分配到每個(gè)傳感器的載荷，其稱量的準(zhǔn)確度就越高。但在實(shí)際使用時(shí)，由于加在傳感器上的載荷除被稱物體外，還存在秤體自重、皮重、偏載及振動(dòng)沖擊等載荷，因此選用傳感器量程時(shí)，要考慮諸多方面的因素，保證傳感器的安全和壽命。

    傳感器量程的計(jì)算公式是在充分考慮到影響秤體的各個(gè)因素后，經(jīng)過大量的實(shí)驗(yàn)而確定的。

公式如下：

• C=K-0K-1K-2K-3（Wmax+W）/N

• C—單個(gè)傳感器的額定量程

• W—秤體自重

• Wmax—被稱物體凈重的zui大值

• N—秤體所采用支撐點(diǎn)的數(shù)量

• K-0—保險(xiǎn)系數(shù)，一般取值在1.2～1.3之間

• K-1—沖擊系數(shù)

• K-2—秤體的重心偏移系數(shù)

• K-3—風(fēng)壓系數(shù)

    根據(jù)經(jīng)驗(yàn)，一般應(yīng)使傳感器工作在其30%～70%量程內(nèi)，但對于一些在使用過程中存在較大沖擊力的衡器，如動(dòng)態(tài)軌道衡、動(dòng)態(tài)汽車衡、鋼材秤等，在選用傳感器時(shí)，一般要擴(kuò)大其量程，使傳感器工作在其量程的20%～30%之內(nèi)，使傳感器的稱量儲備量增大，以保證傳感器的使用安全和壽命。

要考慮各種類型傳感器的適用范圍：

    傳感器的準(zhǔn)確度等級包括傳感器的非線形、蠕變、蠕變恢復(fù)、滯后、重復(fù)性、靈敏度等技術(shù)指標(biāo)。在選用傳感器的時(shí)候，不要單純追求高等級的傳感器，而既要考慮滿足電子秤的準(zhǔn)確度要求，又要考慮其成本。

對傳感器等級的選擇必須滿足下列兩個(gè)條件：

    1.滿足儀表輸入的要求。稱重顯示儀表是對傳感器的輸出信號經(jīng)過放大、A/D轉(zhuǎn)換等處理之后顯示稱量結(jié)果的。因此，傳感器的輸出信號必須大于或等于儀表要求的輸入信號大小，即將傳感器的輸出靈敏度代人傳感器和儀表的匹配公式，計(jì)算結(jié)果須大于或等于儀表要求的輸入靈敏度。

    2.滿足整臺電子秤準(zhǔn)確度的要求。一臺電子秤主要是由秤體、傳感器、儀表三部分組成，在對傳感器準(zhǔn)確度選擇的時(shí)候，應(yīng)使傳感器的準(zhǔn)確度略高于理論計(jì)算值，因?yàn)槔碚撏艿娇陀^條件的限制，如秤體的強(qiáng)度差一點(diǎn)，儀表的性能不是很好、秤的工作環(huán)境比較惡劣等因素都直接影響到秤的準(zhǔn)確度要求，因此要從各方面提高要求，又要考慮經(jīng)濟(jì)效益，確保達(dá)到目的。

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XML-B300N2S11

XML-B300N2C11

XML-B300E2S11

XML-B300E2C11

XML-B300D2S12

XML-B300D2S11

XML-B300D2C11

XML-B160N2S11

XML-B160N2C11

XML-B160E2S11

XML-B160D2S12

XML-B160D2S11

XML-B160D2C11

XML-B070N2S11

XML-B070E2S11

XML-B070D2S11

XML-B070D2C11

XML-B035P2S11

XML-B035C2S11

XML-B035C2C11

XML-B035B2S11

XML-B035A2S11

XML-B035A2C11

XML-B020C2S11

XML-B020B2S11

XML-B020B2C11

XML-B020A2S12

XML-B020A2S11

XML-B020A2C11

XML-B010P2S11

XML-B010C2S11

XML-B010B2S12

XML-B010B2S11

XML-B010B2C11

XML-B010A2S12

XML-B010A2S11033

XML-B010A2S11030

XML-B010A2S11028

XML-B010A2S11

XML-B010A2C11

XML-B004C2S11

XML-B004B2S11

XML-B004A2S11

XML-B004A2C11

XML-B002B2S11

XML-B002A2S11

XML-B002A2C11

XML-B001S2S11

XML-B001R2S12

XML-B001R2S11

XML-AM01V2S12

XML-AM01V2S11

XML-AM01V2C11

XML-AM01T2S11

XML-A500N2S11

XML-A500E2S11

XML-A500D2S12

XML-A500D2S11

XML-A500D2C11

XML-A300N2S11

XML-A300E2S11

XML-A300E2C11

XML-A300D2S12

XML-A300D2S11

XML-A300D2C11

XML-A160N2S11

XML-A160E2S11

XML-A160E2C11

XML-A160D2S12

XML-A160D2S11

XML-A160D2C11

XML-A070N2S11

XML-A070E2S11

XML-A070E2C11

XML-A070D2S14

XML-A070D2S12

XML-A070D2S11

XML-A070D2C11

XML-A035C2S11

XML-A035C2C11

XML-A035B2S11

XML-A035A2S13

XML-A035A2S12

XML-A035A2S11

XML-A035A2C11

XML-A020C2S12

XML-A020C2S11

XML-A020B2S12

XML-A020B2S11

XML-A020B2C11

XML-A020A2S11

XML-A020A2C14

XML-A020A2C11

XML-A010P2S11

XML-A010P2C11

XML-A010C2S12

XML-A010C2S11

XML-A010C2C11

XML-A010B2S11

XML-A010B2C11

XML-A010A2S13

XML-A010A2S12

XML-A010A2S11

XML-A010A2D11

XML-A010A2C11

XML-A004P2S11

XML-A004C2S11

XML-A004B2S11

XML-A004A2S12

XML-A004A2S11

XML-A004A2C11

XML-A002C2S12

XML-A002C2S11

XML-A002C2C11

XML-A002B2S11

XML-A002A2S12

XML-A002A2S11

XML-A002A2C11

XML-A001S2S11

XML-A001S2C11

XML-A001R2S12

XML-A001R2S11

XML-A001R2C11