橡胶表面电阻率测试仪BEST-121

橡胶表面电阻率测试仪BEST-121应用范围 ：

a    材料高阻测试测量如防静电产品（防静电鞋、防静电塑料橡胶制品、计 算机房防静电活动地板等）电阻值的检测；
b    材料体积电阻(率)和表面电阻(率)测量；
c    电化学和材料测试,以及物理,光学和材料研究;
d    微弱电流测量如光电效应和器件暗电流测量。

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.

橡胶表面电阻率测试仪BEST-121技术指标

1.电阻测量范围： 0.01×10 4Ω ～1×10 18Ω。

2.电流测量范围为: 2×10-4A～1×10-16A

3. 双表头显示: 3.1/2位LED显示

4. 内置测试电压：10V、50V、100V、250、500、1000V

5. 基本准确度：1%

6 使用环境: 温度：0℃～40℃，相对湿度<80%

7 机内测试电压: 10/50/100/250/500/1000V 任意切换

8.供电形式: AC 220V，50HZ，功耗约5W

9. 仪器尺寸: 285ｍｍ× 245ｍｍ× 120 mm

10.质量: 约2.5KG

11  测试电压有六种选择之多DC10V、50V、100V、250V、500V、1000V；

12  使用操作简便，在任何电阻量程和测试电压下均直接读显示数字结果，
免去要乘以一个系数的麻烦，使测量超高电阻就如用万用表测量普通电阻样简便。

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.

橡胶表面电阻率测试仪BEST-121工作原理

根据欧姆定律，被测电阻Rx等于施加电压V除以通过的电流I。传统的高阻计的工作原理是测量电压V固定，通过测量流过取样电阻的电流I来得到电阻值。从欧姆定律可以看出，由于电流I是与电阻成反比，而不是成正比，所以电阻的显示值是非线性的，即电阻无穷大时，电流为零，即表头的零位处是∞，其附近的刻度非常密，分辨率很低整个刻度是非线性的。又由于测量不同的电阻时，其电压V也会有些变化，所以普通的高阻计是精度差、分辨率低。

BEST121型数字高阻计是同时测出电阻两端的电压V和流过电阻的电流I，通过内部的大规模集成电路完成电压除以电流的计算，然后把所得到的结果经过A/D转换后以数字显示出电阻值，即便是电阻两端的电压V和流过电阻的电流I是同时变化，其显示的电阻值不象普通高阻计那样因被测电压V的变化或电流Ｉ的变化而变，所以，即使测量电压、被测量电阻、电源电压等发生变化对其结果影响不大，其测量精度很高()，从理论上讲其误差可以做到零，而实际误差可以做到千分之几或万分之几。

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.

橡胶表面电阻率测试仪BEST-121使用方法

高频Q表是多用途的阻抗测量仪器，为了提高测量精度，除了使Q表测试回路本身残余参量尽可能地小，使耦合回路的频响尽可能地好之外，还要掌握正确的测试方法和残余参数修正方法。

1．测试注意事项

a．本仪器应水平安放；

b．如果你需要较精确地测量，请接通电源后，预热30分钟；

c．调节主调电容或主调电容数码开关时，当接近谐振点时请缓调；

d．被测件和测试电路接线柱间的接线应尽量短，足够粗，并应接触良好、可靠，以减少因接线的电阻和分布参数所带来的测量误差；

e．被测件不要直接搁在面板顶部，离顶部一公分以上，必要时可用低损耗的绝缘材料如聚苯乙烯等做成的衬垫物衬垫；

f．手不得靠近试件，以免人体感应影响造成测量误差，有屏蔽的试件，屏蔽罩应连接在低电位端的接线柱。

2．高频线圈的Q值测量（基本测量法）

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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