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液体增塑剂绝缘电阻测试仪

型 号BEST-121

更新时间2018-08-15

厂商性质生产厂家

报价13

产品描述:液体增塑剂绝缘电阻测试仪

产品概述

液体增塑剂绝缘电阻测试仪操作方式:

1、电流先手动调零

2、调整测试电压

3、旋转电阻波荡观察数值

4、读取电阻值

5、根据电阻值按以下公式求出

 

(1)体积电阻率计算公式如下:

 

PV=RxA/h

式中:PV——体积电阻率,单位为欧姆厘米(Ω.cm);

RX——按测得的体积电阻,单位为欧姆(Ω);

A——是被保护电极的有效面积,单位为平方米(m2或(平方厘米(cm2))

h——试样的平均厚度,单位为米(m)或厘米(cm)

 

(2)表面电阻率计算:

表面电阻率计算公式如下:

Ps=Rxp/g

 

 

式中Ps——体积电阻率,单位为欧姆米(Ω.cm);

RX——按测得的表电阻,单位为欧姆(Ω);

P——是被保护电极的有效周长,单位为米(m)或(厘米(cm))

g——两电极之间的距离,单位为米(m)或厘米(cm)

 

 

液体增塑剂绝缘电阻测试仪指标                             

1、电阻测量范围: 0.01×104Ω 1×1018Ω。

2、电流测量范围为: 2×10-4A1×10-16A

3、显 式: 32LED液晶屏显示

4、内置测试电压: 10V 50V100V2505001000V

5、基本准确度:1% (*)

6、使用环境: 温度:040,相对湿度<80%

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

8、供电形式: AC 220V50HZ,功耗约5W

9、仪器尺寸: 285mm× 245mm× 120 mm

10、质量: 2.5KG

 

 

 

标准:

         GB/T 1410-2006 固体绝缘材料体积电阻率和表面电阻率试验方法》

         ASTM D257-99《绝缘材料的直流电阻或电导试验方法》

         GB/T 10581-2006 《绝缘材料在高温下电阻和电阻率的试验方法》

GB/T 1692-2008 《硫化橡胶 绝缘电阻率的测定》

GB/T 2439-2001《硫化橡胶或热塑性橡胶 导电性能和耗散性能电阻率的测定》

GB/T 12703.4-2010 《纺织品  静电性能的评定  第4部分:电阻率》

GB/T 10064-2006_《测定固体绝缘材料绝缘电阻的试验方法》

 

 

 

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。

本仪器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。

 

 

 

应用

1、测量绝缘材料电阻()

2、测量防静电材料的电阻及电阻率

3、测量计算机房用活动地板的系统电阻值

4、测量防静电鞋、导电鞋的电阻值

5、光电二极管暗电流测量

6、物理,光学和材料研究

 

 

Liquid plasticizer insulation resistance tester operation mode:

1, the current manual zero first

2, adjust the test voltage

3, rotating resistance undulatory observation values

4, read the resistance value

5, according to the resistance value calculated by the following formula

 

(1) the volume resistivity calculation formula is as follows:

 

PV = RxA/h

Type: PV, volume resistivity, the unit is ohm cm (Ω. Cm);

RX - according to the measured volume resistance, the unit for ohm (Ω);

A - is to protect the effective area of electrode, the unit is square meters (m2) or (square centimeters (cm2))

H - the average thickness of the sample, the unit is meter (m) or centimeters (cm)

 

(2) the surface resistivity calculation:

Surface resistivity calculation formula is as follows:

Ps = Rxp/g

 

 

Type: Ps, volume resistivity, the unit is ohm meters (Ω. Cm);

RX - according to the measured resistance table, the unit for ohm (Ω);

P - is to protect the electrode circumference, the unit is meter (m) or (centimeters (cm))

G - the distance between the two electrodes, the unit is meter (m) or centimeters (cm)

 

 

Liquid plasticizer insulation resistance tester

1, resistance measuring range: 0.01 x 104 x 1018 Ω Ω ~ 1.

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

3, show type: 32 LED LCD display

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

5, basic accuracy: 1% (*)

6, using the environment temperature: 0 ℃ to 40 ℃, relative humidity 80%

Test voltage within 7, machine: 10 v / 50 v / 100/250/100/250 v arbitrary switching

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

9, instrument size: 285 mm * 245 mm * 120 mm

10, quality: about 2.5 KG

 

 

 

Liquid plasticizer insulation resistance tester standard:

GB/T 1410-1410 "solid insulating material volume resistivity and surface resistivity test method"

ASTM D257-99 "dc resistance or conductance method for insulation materials,

GB/T 10581-10581 "insulation resistance at high temperature and resistivity test method"

GB/T 1692-1692 "determination of the vulcanized rubber insulation resistivity,

GB/T 2439-2439 "vulcanized rubber and thermoplastic rubber conductive performance and dissipation performance resistivity measurement"

GB/T 12703.4 2010 "textile electrostatic performance evaluation Part 4: the resistivity.

GB/T 10064-2006 _ "test method for determination of solid insulation insulation resistance,

 

 

 

Principle of liquid plasticizer insulation resistance tester

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.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, resolution is very low.The whole calibration 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.

The instrument 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.

 

 

 

Liquid plasticizer insulation resistance tester application

1, measuring insulation resistance (rates)

2, measuring resistance and resistivity of antistatic materials

3, electric resistance with floor system in the computer room

4, measure the anti-static shoes, conductive resistance value

5, photoelectric diode dark current measurement

6, physics, optics and material research

 

 

 


 

 

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