液體增塑劑絕緣電阻測試儀操作方式：

1、電流先手動調(diào)零

2、調(diào)整測試電壓

3、旋轉(zhuǎn)電阻波蕩觀察數(shù)值

4、讀取電阻值

5、根據(jù)電阻值按以下公式求出

（1）體積電阻率計算公式如下：

PV=RxA/h

式中：P_V——體積電阻率，單位為歐姆厘米（Ω.cm）；

R_X——按測得的體積電阻，單位為歐姆（Ω）；

A——是被保護電極的有效面積，單位為平方米（m²）或（平方厘米（cm²））

h——試樣的平均厚度，單位為米(m)或厘米（cm）

（2）表面電阻率計算：

表面電阻率計算公式如下：

Ps=Rxp/g

式中：P_s——體積電阻率，單位為歐姆米（Ω.cm）；

R_X——按測得的表電阻，單位為歐姆（Ω）；

P——是被保護電極的有效周長，單位為米（m）或（厘米（cm））

g——兩電極之間的距離，單位為米(m)或厘米（cm）

液體增塑劑絕緣電阻測試儀指標                             

1、電阻測量范圍： 0.01×10⁴Ω ～1×10¹⁸Ω。

2、電流測量范圍為： 2×10^-4A～1×10^-16A

3、顯 示 方 式： 32位LED液晶屏顯示

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

5、基本準確度：1% (*注)

6、使用環(huán)境： 溫度：0℃～40℃，相對濕度<80%

7、機內(nèi)測試電壓： 10V/50V/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

標準：

         GB/T 1410-2006《 固體絕緣材料體積電阻率和表面電阻率試驗方法》

         ASTM D257-99《絕緣材料的直流電阻或電導(dǎo)試驗方法》

         GB/T 10581-2006 《絕緣材料在高溫下電阻和電阻率的試驗方法》

GB/T 1692-2008 《硫化橡膠 絕緣電阻率的測定》

GB/T 2439-2001《硫化橡膠或熱塑性橡膠 導(dǎo)電性能和耗散性能電阻率的測定》

GB/T 12703.4-2010 《紡織品  靜電性能的評定  第４部分：電阻率》

GB/T 10064-2006_《測定固體絕緣材料絕緣電阻的試驗方法》

原理

   根據(jù)歐姆定律，被測電阻Rx等于施加電壓V除以通過的電流I。傳統(tǒng)的高阻計的工作原理是測量電壓V固定，通過測量流過取樣電阻的電流I來得到電阻值。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，即電阻無窮大時，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。整個刻度是非線性的。又由于測量不同的電阻時，其電壓V也會有些變化，所以普通的高阻計是精度差、分辨率低。

本儀器是同時測出電阻兩端的電壓V和流過電阻的電流I，通過內(nèi)部的大規(guī)模集成電路完成電壓除以電流的計算，然后把所得到的結(jié)果經(jīng)過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和流過電阻的電流I是同時變化，其顯示的電阻值不象普通高阻計那樣因被測電壓V的變化或電流Ｉ的變化而變，所以，即使測量電壓、被測量電阻、電源電壓等發(fā)生變化對其結(jié)果影響不大，其測量精度很高()，從理論上講其誤差可以做到零，而實際誤差可以做到千分之幾或萬分之幾。

應(yīng)用

1、測量絕緣材料電阻(率)

2、測量防靜電材料的電阻及電阻率

3、測量計算機房用活動地板的系統(tǒng)電阻值

4、測量防靜電鞋、導(dǎo)電鞋的電阻值

5、光電二極管暗電流測量

6、物理,光學(xué)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