绝缘材料表面电阻测试仪BEST-121
绝缘材料表面电阻测试仪符合标准：
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
GB 12014 防静电工作服
GB/T 20991-2007 个体防护装备 鞋的测试方法
GB 4385-1995 防静电鞋、导电鞋技术要求
GB 12158-2006 防止静电事故通用导则
GB 4655-2003 橡胶工业静电安全规程
GB/T 12703.4-2010 纺织品 静电性能的评定 第4部分 电阻率
GB/T 12703.6-2010 纺织品 静电性能的评定 第6部分 纤维泄漏电阻
GB 13348-2009 液体石油产品静电安全规程
GB/T 15738-2008 导电和抗静电纤维增强塑料电阻率试验方法
GB/T 18044-2008 地毯 静电习性评价法 行走试验
GB/T 18864-2002 硫化橡胶 工业用抗静电和导电产品 电阻极限范围
GB/T 22042-2008 服装 防静电性能 表面电阻率试验方法
GB/T 22043-2008 服装 防静电性能 通过材料的电阻（垂直电阻）试验方法
GB/T 24249-2009 防静电洁净织物
GB 26539-2011 防静电陶瓷砖 Antistatic ceramic tiles
GB/T 26825-2011 抗静电防腐胶
GB 50515-2010 导（防）静电地面设计规范
GB 50611-2010 电子工程防静电设计规范
GJB 105-1998-Z 电子产品防静电放电控制手册
GJB 3007A-2009 防静电工作区技术要求
GJB 5104-2004 无线电引信风帽用防静电涂料及风帽静电性能通用要求
绝缘材料表面电阻测试仪工作原理：
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。
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(专利),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。
绝缘材料表面电阻测试仪主要应用范围
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；
材料体电阻(率)和表面电阻(率)测量；
电化学和材料测试,以及物理,光学和材料研究;
微弱电流测量如光电效应和器件暗电流测量。
绝缘材料表面电阻测试仪技术指标：
1,电阻测量范围： 0.01×104Ω ～1×1018Ω。
2,电流测量范围为： 2×10-4A～1×10-16A
3,显 示 方 式：数字液晶显示
4,内置测试电压： 10V ,50V,100V,250,500,1000V
5,基本准确度：1% (*注)
6,使用环境： 温度：0℃～40℃,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 220V,50HZ,功耗约5W
9,仪器尺寸： 285ｍｍ× 245ｍｍ× 120 mm
10,质量： 约5KG
绝缘材料表面电阻测试仪注意事项：
仪器使用前请仔细阅读以下内容，否则将造成仪器损坏或***情况。
1.检查仪器后面板电压量程是否置于10V档，电流电阻量程是否置于104档。
2.接通电源调零，（注意此时主机不得与屏蔽箱线路连接）在“Rx”两端开路的情况下，调零使电流表的显示为0000。然后关机。
3.将待测试样平铺在不保护电极正***，然后用保护电极压住样品，再插入被保护电极（不保护电极、保护电极、被保护电极应同轴且确认电极之间无短路）。
4.测体积电阻时测试按钮拨到Rv边，测表面电阻时测试按钮拨到Rs边，
5.接好测试线，将测试线将主机与屏蔽箱连接好。量程置于104档，打开主机后面板电源开关按钮。从仪器后面板调电压按钮到所要求的测量电压。(比如：GBT 1692-2008 硫化橡胶 绝缘电阻率的测定 标准中注明要求在500V电压进行测定，那么电压就要升到500V)
6.电流电阻量程按钮从低档位逐渐拨***，每拨一次停留1-2秒观察显示数字，当被测电阻大于仪器测量量程时，电阻表显示“1”，此时应继续将仪器拨到量程更高的位置。测量仪器有显示值时应停下，在1min的电化时间后测量电阻，当前的数字乘以档次即是被测电阻。
7.测试完毕先将量程拨至（104）档，然后将测量电压拨至10V档，***后将测试按钮拨到***位置后关闭电源。然后进行下一次测试。
8.应在“Rx”两端开路时调零，一般一次调零后在测试过程中不需再调零。
9.禁止将“RX”两端短路，以免微电流放大器受大电流冲击。
10.不得在测试过程中不要随意改动测量电压。
11.测量时从低次档逐渐拨往高次档。
12.接通电源后，手指不能触及高压线的金属部分。
13.不得测试过程中不能触摸微电流测试端。
14.在测量高阻时，应采用屏蔽盒将被测物体屏蔽。
15.严禁在试测过程随意改变电压量程及在通电过程中打开主机。
16.严禁电流电阻量程未在104档及电压在10V档，更换试样。
绝缘材料表面电阻测试仪
Meet the standa***:
Standard Test Method for bulk resistivity and surface resistivity of solid insulating materials, 1410-2006 GB/T
GB 12014 anti-static work clothes
Test method of 20991-2007 GB/T personal protective equipment shoes
4385-1995 GB anti-static shoes, conductive shoes technical requirements
General guidelines for the prevention of electrostatic accidents with 12158-2006 GB
Electrostatic safety procedures for 4655-2003 GB rubber industry
The fourth part of the evaluation of the electrostatic properties of 12703.4-2010 GB/T textiles
Asses***ent of the electrostatic properties of 12703.6-2010 GB/T textiles in sixth part fiber leakage resistance
Electrostatic safety regulati*** for 13348-2009 GB liquid petroleum products
Test method for electrical resistivity of 15738-2008 GB/T conductive and antistatic fiber reinforced plastics
18044-2008 GB/T carpet static beh***ior evaluation method walking test
18864-2002 GB/T vulcanized rubber industry with antistatic and conductive products resistance limit range
Test method for surface resistivity of 22042-2008 GB/T clothing against static electricity resistance
Test method for resistance of 22043-2008 GB/T clothing against static electricity through the resistance (vertical resistance) of the material
24249-2009 GB/T anti static clean fabric
26539-2011 GB anti static ceramic brick ceramic tiles Antistatic
26825-2011 GB/T antistatic anticorrosive adhesive
Specification for design of 50515-2010 GB (anti) electrostatic ground
Code for design of ESD protection for 50611-2010 GB Electronic Engineering
Manual of ESD control for 105-1998-Z GJB electronic products
Technical requirements of 3007A-2009 GJB anti static working area
General requirements for anti electrostatic coating and hood electrostatic performance using GJB 5104-2004 radio fuze cap
Working principle：
According to Ohm's law, the measured resistance Rx is equal to the applied voltage V divided by the current I. The traditional high resistance meter works is the measurement of the voltage V fixed, by measuring the flow through the sampling resistance of the current I to get the resistance value. From Ohm's law can be seen as the current I is inversely proportional to the resistance, but not proportional, so is nonlinear resistance display value is infinite resistance when the current is zero, which is zero at the header is infinite, the scale near the very dense, low resolution. The whole scale is nonlinear. And since the measurement of different resistance, the voltage V will be some changes, so the ***erage high resistance meter is poor accuracy, low resolution.
This instrument is the current flowing through the resistor V and the voltage across the resistor I measured at the same time, the large scale integrated circuit to complete the calculation of the internal voltage divided by the current, and then the results obtained after A/D conversion by the digital display of the resistance value, even if the current voltage V and the flow resistance of the two ends of the I is changed at the same time, the resistance value is not displayed as ordinary high resistance meter as a result of the measured voltage or current change of V I variation, so, even if the measured voltage, by measuring the resistance, the power supply voltage changes h***e little effect on the results, the measurement accuracy is very high (patent), theoretically the error can be zero, while the actual error can be done a few thousandths or very few.
Main application range
The measurement of the resistance value of the materials, such as anti - static products, anti-static shoes, anti - static plastic rubber products, computer room and floor, etc.;
Material volume resistance (rate) and surface resistance (rate) measurement;
Electrochemical and material testing, as well as physical, optical, and material studies;
Weak current measurement, such as photoelectric effect and dark current measurement.
Technical index:
1, resistance measurement range: 0.01 * 104 ~ 1 * 1018.
2, the current measurement range is: 2 * 10-4A ~ 1 * 10-16A
3, display mode: Digital LCD display
4, built-in test voltage: 10V, 50V, 100V, 2505001000V
5, basic accuracy: 1% (* Note)
6, the use of the environment: temperature: 0 degrees Celsius to 40 degrees Celsius, the relative humidity of <80%
7, the machine test voltage: 10V/50V/100/250/500/1000V arbitrary switching
8, the form of power supply: 220V AC, 50HZ, power c***umption is about 5W
9, instrument size: 285mm * 245mm * 120 mm
10, quality: about 5KG
Matters needing attention
Before use, please read the following content carefully, otherwise it will cause damage to the instrument or electric shock.
1 check the instrument panel voltage range is placed in the 10V file, the current resistance range is placed in the 104 file.
2 switch on the power of zero, (note that the host is not connected with the shield box line) in the "Rx" at both ends of the open circuit, zero adjustment to the current table display is 0000. Then shut down.
3 test samples will be laid on the protection of the central electrode is not used, then press protective electrode samples, then insert the protected electrode (do not protect the electrode, electrode, electrode protection protection should be no short circuit between the coaxial electrode and confirm).
4 measurement of the volume resistance when the test button to dial the Rv edge, the test surface resistance when the test button to dial the Rs edge,
5 to connect the test line, the test line will be connected to the host and shielding box. Range in 104 stalls, open the host after the panel power switch button. Measuring the voltage from the rear panel of the instrument to the required measurement. (for example: 1692-2008 GBT vulcanized rubber insulation resistivity measurement standard specified in the 500V voltage measurement, then the voltage will rise to 500V)
6 current resistance range button from the low places gradually dial high-grade, each allocated a stop 1-2 seconds to observe display numbers, when the measured resistance is greater than the instrument measurement range, the resistance table shows "1", this time should be allocated to the instrument range to a higher position. Measuring instruments h***e a display value should be stopped, in the 1min of the electrochemical time after the measurement of resistance, the current number is multiplied by the grade that is the measured resistance.
7 after the test is completed, the measuring range is set to (104) file, and then the measuring voltage is transferred to the 10V file, and finally the test button is set to the central position and then the power supply is switched off. And then proceed to the next test.
8 in the "Rx" open ends at zero, generally one time during the test without zero zero.
9 prohibit the "RX" at both ends of the short circuit, so as to ***oid micro current