橡膠表面電阻率測(cè)試儀BEST-121
*符合國(guó)家標(biāo)準(zhǔn)GB1410－2006固體電工絕緣材料絕緣電阻、體積電阻系數(shù)和表面電阻試驗(yàn)方法，ASTM D257 絕緣材料的直流電阻或電導(dǎo)試驗(yàn)方法　等標(biāo)準(zhǔn)要求。
本儀器配不同的測(cè)量電極（夾具）可以測(cè)量不同材料（固體、粉體或液體）的體積電阻率和表面電阻率或電導(dǎo)率。適用于橡膠、塑料、薄膜、及粉體、液體、及固體和膏體形狀的各種絕緣材料體積和表面電阻值的測(cè)定。

詳細(xì)介紹

橡膠表面電阻率測(cè)試儀BEST-121

橡膠表面電阻率測(cè)試儀BEST-121應(yīng)用范圍：

a 材料高阻測(cè)試測(cè)量如防靜電產(chǎn)品（防靜電鞋、防靜電塑料橡膠制品、計(jì) 算機(jī)房防靜電活動(dòng)地板等）電阻值的檢測(cè)；
b 材料體積電阻(率)和表面電阻(率)測(cè)量；
c 電化學(xué)和材料測(cè)試,以及物理,光學(xué)和材料研究;
d 微弱電流測(cè)量如光電效應(yīng)和器件暗電流測(cè)量。

Rubber surface resistivity tester BEST-121 range of application:

A material high resistance test measures such as anti-static products (anti-static shoes, anti-static plastic rubber products, anti-static raised floor meter calculate room, etc.) resistance test;

B material volume resistance (rate) and surface resistance (rates) measurement;

C electrochemical and material testing, as well as physics, optics and materials research;

D weak current measurement, such as the photoelectric effect and dark current measurement device.

橡膠表面電阻率測(cè)試儀BEST-121技術(shù)指標(biāo)

1.電阻測(cè)量范圍： 0.01×10 4Ω ～1×10 18Ω。

2.電流測(cè)量范圍為: 2×10-4A～1×10-16A

3. 雙表頭顯示: 3.1/2位LED顯示

4. 內(nèi)置測(cè)試電壓：10V、50V、100V、250、500、1000V

5. 基本準(zhǔn)確度：1%

6 使用環(huán)境: 溫度：0℃～40℃，相對(duì)濕度<80%

7 機(jī)內(nèi)測(cè)試電壓: 10/50/100/250/500/1000V 任意切換

8.供電形式: AC 220V，50HZ，功耗約5W

9. 儀器尺寸: 285ｍｍ× 245ｍｍ× 120 mm

10.質(zhì)量: 約2.5KG

11 測(cè)試電壓有六種選擇之多DC10V、50V、100V、250V、500V、1000V；

12 使用操作簡(jiǎn)便，在任何電阻量程和測(cè)試電壓下均直接讀顯示數(shù)字結(jié)果，
免去要乘以一個(gè)系數(shù)的麻煩，使測(cè)量超高電阻就如用萬(wàn)用表測(cè)量普通電阻樣簡(jiǎn)便。

Rubber surface resistivity tester BEST-121 technical indicators

1. Resistance measurement range: 0.01 x 10 4 Ω 1 x 10 ~ 18 Ω.

2. The current measuring range is: 2 x 10-4 a ~ 1 x 10 to 16 a

3. Double header shows: 3.1/2 LED display

4. The built-in test voltage: 10 v, 50 v, 100 v, 250, 500, 100 v

5. Basic accuracy: 1%

6 use environment: temperature: 0 ℃ to 40 ℃, relative humidity < 80%，Test voltage within 7 machine: 10/50/100/250/100/250 v arbitrary switching

8. Power supply: AC 220 v, 50 hz, power consumption of about 5 w

9. The instrument size: 285 mm * 245 mm * 120 mm

10. Quality: about 2.5 KG

There are as many as six choose 11 test voltage DC10V, 50 v, 100 v, 250 v, 500 v, 1000 v;

12 use easy to operate, under any resistance range and testing voltage display digital results are directly read,

The bother of should be multiplied by a coefficient, make measuring high resistance as ordinary resistance is measured with a multimeter sample is simple.

橡膠表面電阻率測(cè)試儀BEST-121工作原理

根據(jù)歐姆定律，被測(cè)電阻Rx等于施加電壓V除以通過(guò)的電流I。傳統(tǒng)的高阻計(jì)的工作原理是測(cè)量電壓V固定，通過(guò)測(cè)量流過(guò)取樣電阻的電流I來(lái)得到電阻值。從歐姆定律可以看出，由于電流I是與電阻成反比，而不是成正比，所以電阻的顯示值是非線性的，即電阻無(wú)窮大時(shí)，電流為零，即表頭的零位處是∞，其附近的刻度非常密，分辨率很低整個(gè)刻度是非線性的。又由于測(cè)量不同的電阻時(shí)，其電壓V也會(huì)有些變化，所以普通的高阻計(jì)是精度差、分辨率低。

BEST121型數(shù)字高阻計(jì)是同時(shí)測(cè)出電阻兩端的電壓V和流過(guò)電阻的電流I，通過(guò)內(nèi)部的大規(guī)模集成電路完成電壓除以電流的計(jì)算，然后把所得到的結(jié)果經(jīng)過(guò)A/D轉(zhuǎn)換后以數(shù)字顯示出電阻值，即便是電阻兩端的電壓V和流過(guò)電阻的電流I是同時(shí)變化，其顯示的電阻值不象普通高阻計(jì)那樣因被測(cè)電壓V的變化或電流Ｉ的變化而變，所以，即使測(cè)量電壓、被測(cè)量電阻、電源電壓等發(fā)生變化對(duì)其結(jié)果影響不大，其測(cè)量精度很高()，從理論上講其誤差可以做到零，而實(shí)際誤差可以做到千分之幾或萬(wàn)分之幾。

Rubber surface resistivity tester BEST-121 working principle

According to the ohm's law, the resistance to be measured Rx is equal to the applied voltage V of the divided by the current through the I. Working principle of the traditional high resistance meter is to measure the voltage V fixed, by measuring the I current through the sampling resistor to get resistance. As can be seen from the ohm's law, due to the current (I) is inversely proportional to the resistance, rather than direct proportion, so the display value of resistance is nonlinear, when the resistance is infinite, current is zero, namely the header of the zero level is up, the scale is very near, very low resolution the whole scale is nonlinear. By measuring the resistance of the different, its voltage V will be some changes, so ordinary high resistance meter is of poor accuracy and low resolution.

BEST121 digital type high resistance meter to measure the resistance at the same time on both ends of the current through the resistor voltage V and I, through the internal voltage divided by the current calculation of large scale integrated circuit is complete, then put the results after A/D conversion to digital shows resistance, even at the ends of the resistance current through the resistor voltage V and I change at the same time, the display of the resistance is not like ordinary high resistance meter by measuring the change of the V voltage or current I change and change, so, even if the measured voltage, by measuring the resistance and voltage change has A little influence on the results, the measuring precision is very high (patent), in theory, the error can be zero, and the actual error can achieve A few parts per thousand or so few.

橡膠表面電阻率測(cè)試儀BEST-121使用方法

高頻Q表是多用途的阻抗測(cè)量?jī)x器，為了提高測(cè)量精度，除了使Q表測(cè)試回路本身殘余參量盡可能地小，使耦合回路的頻響盡可能地好之外，還要掌握正確的測(cè)試方法和殘余參數(shù)修正方法。

1．測(cè)試注意事項(xiàng)

a．本儀器應(yīng)水平安放；

b．如果你需要較精確地測(cè)量，請(qǐng)接通電源后，預(yù)熱30分鐘；

c．調(diào)節(jié)主調(diào)電容或主調(diào)電容數(shù)碼開(kāi)關(guān)時(shí)，當(dāng)接近諧振點(diǎn)時(shí)請(qǐng)緩調(diào)；

d．被測(cè)件和測(cè)試電路接線柱間的接線應(yīng)盡量短，足夠粗，并應(yīng)接觸良好、可靠，以減少因接線的電阻和分布參數(shù)所帶來(lái)的測(cè)量誤差；

e．被測(cè)件不要直接擱在面板頂部，離頂部一公分以上，必要時(shí)可用低損耗的絕緣材料如聚苯乙烯等做成的襯墊物襯墊；

f．手不得靠近試件，以免人體感應(yīng)影響造成測(cè)量誤差，有屏蔽的試件，屏蔽罩應(yīng)連接在低電位端的接線柱。

2．高頻線圈的Q值測(cè)量（基本測(cè)量法）

Rubber surface resistivity tester BEST-121 method of use

Frequency of Q is a multipurpose impedance measurement instruments, in order to improve the accuracy of measurement, in addition to residual parameter Q meter test loop itself as little as possible to make good coupling circuit frequency response as soon as possible, to grasp the correct testing method and residual parameter correction method.

1. Test points for attention

A. the instrument should be placed;

B. if you will need to measure accuray, please after turning on the power supply, preheat 30 minutes;

C. adjust tone electrical or tone capacitance digital switch, when close to the resonance point please slow;

D. a connection between terminal and testing circuit being measured should be short, thick enough, and should be in contact with good, reliable, in order to reduce the resistance and the distribution parameters for wiring the measurement error;

E. measured piece don't directly put on the top of the panel, more than 1 cm from the top, low loss of insulation materials available when necessary such as underlay gasket made of polystyrene, etc;

F. hand shall not be close to the specimen, lest cause measurement error, the human body induction effect have shielding of the specimen, shield should be connected in the low potential terminal.

2. The Q value of high frequency coil measurement (basic measurement method)

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