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[供應]ASTM D257絕緣材料的直流電阻或電導試驗儀
ASTM D257絕緣材料的直流電阻或電導試驗儀
符合標準：
GB1410《固體電工絕緣材料絕緣電阻、體積電阻系數和表面電阻試驗方法》
ASTM D257《絕緣材料的直流電阻或電導試驗方法》
一、概述
既可測量高電阻，又可測微電流。采用了美國In公司的大規模集成電路,使儀器體積小、重量輕、準確度高。以雙3.1/2 位數字直接顯示電阻的高阻計和電流。量限從1×104Ω ～1×1018 Ω，是目前國內測量范圍zui寬，準確度zui高的數字超高阻測量儀。電流測量范圍為2×10-4 ～1×10-16Ａ。機內測試電壓為10/50/100/250/500/1000V任意可調。本儀器具有精度高、顯示迅速、性好穩定、讀數方便， 適用于防靜電產品如防靜電鞋、防靜電塑料橡膠制品、計算機房防靜電活動地板等電阻值的檢驗以及絕緣材料和電子電器產品的絕緣電阻測量。固體絕緣材料體積/表面電阻率測定儀除能測電阻外，還能直接測量微弱電流。
三、技術指標
序號 | 項目 | 參數 |
1 | 電阻測量范圍 | 1×104Ω ～1×1018Ω |
2 | 電流測量范圍 | 2×10-4A～1×10-16A |
3 | 雙表頭顯示 | 3.1/2位LED顯示 |
4 | 內置測試電壓 | 10V、50V、100V、250、500、1000V |
5 | 基本準確度 | 1% |
6 | 使用環境 | 溫度：0℃～40℃，相對濕度<80% |
7 | 機內測試電壓 | 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 | 質量 | 約2.5KG |
四、工作原理
根據歐姆定律，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，通過內部的大規模集成電路完成電壓除以電流的計算，然后把所得到的結果經過A/D轉換后以數字顯示出電阻值，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、電源電壓等發生變化對其結果影響不大，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。
典型應用
1．測量防靜電鞋、導電鞋的電阻值
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電阻值
4、測量絕緣材料電阻(率)
5、光電二極管暗電流測量
6、物理,光學和材料研究
標準配置：
序號 | 配置 | 數量 | 單位 |
1 | 測試儀器 | 臺 | 1 |
2 | 電源線 | 條 | 1 |
3 | 測量線 | 根 | 3 |
4 | 使用說明書 | 份 | 1 |
狀 態： 在線 |
|
ASTM D257絕緣材料的直流電阻或電導試驗儀
GB1410 "solid electrical insulation materials insulation resistance, volume resistivity and surface resistance test method"
DC resistance or conductance of insulating materials test method "ASTM D257"
Not only can measure high resistance, and micrometer current. Using large scale integrated circuit American In company, so that the instrument has the advantages of small volume, light weight, high accuracy. High resistance meter and current resistancedirectly by double 3.1/2 digit display. Range from 1 * 104 to 1 * 1018 Omega Omega, is currently the most wide measuring range, digital with the highest accuracy of ultra highresistance measuring instrument. Current measuring range of 2 * 10-4 to 1 * 10-16A.The built-in test voltage of 10/50/100/250/500/1000V adjustable. The instrument hashigh precision, good stability, showing rapid, convenient reading, suitable for measuring insulation resistance in anti-static products such as anti-static shoes, anti-static plastic and rubber products, anti static floor computer room inspection such as value of resistance and insulation materials and electronic products. The volume of materialsurface resistivity tester / in addition to the measured resistance solid insulation, but also the direct measurement of weak current.
The serial number of the project parameter
1 resistance measurement range of 1 * 104 to 1 * 1018 Omega Omega
The 2 current measuring range of 2 * 10-4A to 1 * 10-16A
3 double headers 3.1/2 bit LED display
4 built-in test voltage of 10V, 50V, 100V, 250, 500, 1000V
5 basic accuracy 1%
6 the use of environmental temperature: 0 to 40 DEG C, relative humidity <80%
7 for in test voltage 10/50/100/250/500/1000V of arbitrary switching
8 power supply forms AC 220V, 50HZ, power consumption is about 5W
The 9 instrument size 285mm * 245mm * 120 mm
10 quality about 2.5KG
According to Ohm's law, the resistance being measured Rx is equal to the applied voltage divided by current V by I. The working principle of the high resistance meter is the traditional measuring voltage V fixed, by measuring the current flowing through the sampling resistor I to obtain the resistance value. From Ohm's law can be seen,because the current I is inversely proportional to the resistance, but not proportional, sois nonlinear resistive display value, i.e., infinite resistance, current is zero, i.e. zero at the header is infinite, scale near the very dense, with a low resolution. The scale is nonlinear. Because the resistance measurement of different voltage, the V will also besome changes, so the high resistance of ordinary gauge is poor accuracy, low resolution.
This instrument is the current flowing through the resistor V and a voltage across the resistor I measured at the same time, through the large-scale integrated circuit internalto complete the calculation of voltage divided by current, then put the results obtainedafter A/D conversion to digital display value of resistance, even current voltage V and the flow resistance at both ends of the I is changed at the same time, the resistance ofthe display value is not like an ordinary high resistance meter that due to changes in the voltage to be measured changes in V or I current and change, so, even if themeasurement of voltage, resistance, power supply voltage is measured change has little influence on the results, the measuring accuracy is very high (patent), theoretically the error can do zero, while the actual error can do a few thousandths or very few.
1 resistance measurement of anti-static shoes, conductive shoes value
2, measurement of anti electrostatic material resistance and resistivity
3, measurement of computer room with movable floor system resistance value
Insulation resistance measurement (rate), 4
5, photoelectric diode dark current measurement
6, physical, optical and material research
Standard configuration:
Configuring the serial number of the number of units
1 test equipment 1 Taiwan
2 power line 1
3 measuring line 3
4 Manual 1
Company introduction
The product catalog
The supply of information company name: Beijing China aerotime Instrument Equipment Co Ltd
Contact person: Shi Lei
Address: Beijing City, Fangshan District economic and Technological Development Zone No. 1 Gu Ba Lu
Postal Code: 102400
The main page: http://www.zhonghangyq。。ｃｏｍ
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