BEST-121體積表面電阻率測(cè)試儀

體積表面電阻率測(cè)試儀符合標(biāo)準(zhǔn)：
GB1410《固體電工絕緣材料絕緣電阻、體積電阻系數(shù)和表面電阻試驗(yàn)方法》 
ASTM D257《絕緣材料的直流電阻或電導(dǎo)試驗(yàn)方法》 
 
體積表面電阻率測(cè)試儀概述： 
  本儀器既可測(cè)量高電阻，又可測(cè)微電流。采用了美國(guó)Intel公司的大規(guī)模集成電路,使儀器體積小、重量輕、準(zhǔn)確度高。以雙3.1/2 位數(shù)字直接顯示電阻的高阻計(jì)和電流。量限從1×104Ω ～1×1018 Ω，是目前國(guó)內(nèi)測(cè)量范圍最寬，準(zhǔn)確度最高的數(shù)字超高阻測(cè)量?jī)x。電流測(cè)量范圍為2×10-4 ～1×10-16Ａ。機(jī)內(nèi)測(cè)試電壓為10/50/100/250/500/1000V任意可調(diào)。體積表面電阻率具有精度高、顯示迅速、性好穩(wěn)定、讀數(shù)方便， 適用于防靜電產(chǎn)品如防靜電鞋、防靜電塑料橡膠制品、計(jì)算機(jī)房防靜電活動(dòng)地板等電阻值的檢驗(yàn)以及絕緣材料和電子電器產(chǎn)品的絕緣電阻測(cè)量。 

體積表面電阻率測(cè)試儀技術(shù)指標(biāo)： 
1、電阻測(cè)量范圍： 1×104Ω ～1×1018Ω。 
2、電流測(cè)量范圍為： 2×10-4A～1×10-16A 
3、雙表頭顯示： 3.1/2位LED顯示 
4、內(nèi)置測(cè)試電壓：10V、50V、100V、250、500、1000V 
5、基本準(zhǔn)確度：1% (*注) 
6、使用環(huán)境： 溫度：0℃～40℃，相對(duì)濕度<80% 
7、機(jī)內(nèi)測(cè)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(zhì)量： 約2.5KG 

體積表面電阻率測(cè)試儀工作原理： 
    根據(jù)歐姆定律，被測(cè)電阻Rx等于施加電壓V除以通過(guò)的電流I。傳統(tǒng)的高阻計(jì)的工作原理是測(cè)量電壓V固定，通過(guò)測(cè)量流過(guò)取樣電阻的電流I來(lái)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(xiàn)性的，即電阻無(wú)窮大時(shí)，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(gè)刻度是非線(xiàn)性的。又由于測(cè)量不同的電阻時(shí)，其電壓V也會(huì)有些變化，所以普通的高阻計(jì)是精度差、分辨率低。 
    本儀器是同時(shí)測(cè)出電阻兩端的電壓V和流過(guò)電阻的電流I，通過(guò)內(nèi)部的大規(guī)模集成電路完成電壓除以電流的計(jì)算，然后把所得到的結(jié)果經(jīng)過(guò)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(guò)電阻的電流I是同時(shí)變化，其顯示的電阻值不象普通高阻計(jì)那樣因被測(cè)電壓V的變化或電流Ｉ的變化而變，所以，即使測(cè)量電壓、被測(cè)量電阻、電源電壓等發(fā)生變化對(duì)其結(jié)果影響不大，其測(cè)量精度很高(專(zhuān)利)，從理論上講其誤差可以做到零，而實(shí)際誤差可以做到千分之幾或萬(wàn)分之幾。 

體積表面電阻率測(cè)試儀典型應(yīng)用： 
1．測(cè)量防靜電鞋、導(dǎo)電鞋的電阻值 
2、測(cè)量防靜電材料的電阻及電阻率 
3、測(cè)量計(jì)算機(jī)房用活動(dòng)地板的系統(tǒng)電阻值 
4、測(cè)量絕緣材料電阻(率) 
5、光電二極管暗電流測(cè)量 
6、物理,光學(xué)和材料研究 

體積表面電阻率測(cè)試儀標(biāo)準(zhǔn)配置： 
1、測(cè)試儀器：1臺(tái) 
2、電源線(xiàn)：1條 
3、測(cè)量線(xiàn)：3根（屏蔽線(xiàn)、測(cè)試接線(xiàn)、接地線(xiàn)） 
4、使用說(shuō)明書(shū)：1份

體積表面電阻率測(cè)試儀使用方法： 
6.1接好電源線(xiàn) 
確保電源為220VAC/50Hz 
6.2接通電源 
   將電流電阻量程置于 104 檔,電壓量程置于10V，然后開(kāi)機(jī)。
6.3調(diào)零 
在“Rx”兩端開(kāi)路的情況下,調(diào)零使電流表的顯示為0000 .注意：在“Rx”兩端不開(kāi)路，如接在電阻箱或被測(cè)量物體上時(shí)調(diào)零后測(cè)量會(huì)產(chǎn)生很大的誤差。一般一次調(diào)零后在測(cè)試過(guò)程中不需再調(diào)零。 完畢后關(guān)機(jī)。
6.4連接線(xiàn)路 
    接好測(cè)試線(xiàn)，將測(cè)試線(xiàn)將主機(jī)與屏蔽箱連接好，測(cè)體積電阻時(shí)測(cè)試按鈕撥到Rv邊，測(cè)表面電阻時(shí)測(cè)試按鈕撥到Rs邊。然后開(kāi)機(jī)。
6.5選擇合適的測(cè)量電壓 
★電壓選擇開(kāi)關(guān)在后面板，注意，在測(cè)試過(guò)程中不要隨意改動(dòng)測(cè)量電壓，可能因電壓的過(guò)高或電流過(guò)大損壞被測(cè)試器件或測(cè)試儀器; 
6.6測(cè)試 
測(cè)量時(shí)從低檔位逐漸拔往高檔，每撥一次稍停留1～2秒以使觀察顯示數(shù)字， 當(dāng)被測(cè)電阻大于儀器測(cè)量量程時(shí)，電阻表顯示“1”，此時(shí)應(yīng)繼續(xù)將儀器撥到量程更高的位置，當(dāng)測(cè)量?jī)x器有顯示值時(shí)應(yīng)停下，當(dāng)前的數(shù)字乘以檔次即是被測(cè)電阻值。當(dāng)有顯示數(shù)字時(shí)不要再往更高次檔撥，否測(cè)儀器會(huì)過(guò)量程，機(jī)內(nèi)保護(hù)電路開(kāi)始工作，儀器測(cè)量準(zhǔn)確度會(huì)下降。 
6.7 測(cè)試完畢將電阻電流量程拔至“104 ”檔，電壓量程調(diào)至10V后關(guān)閉電源
★每測(cè)量一次均應(yīng)將量程開(kāi)關(guān)撥回到104“調(diào)零”檔的量程位置以免開(kāi)機(jī)或測(cè)量端短路時(shí)而損壞儀器。
6.8 測(cè)量電流及1015Ω以上超高電阻的測(cè)量應(yīng)用測(cè)量電流后用歐姆定律以電壓除以電流計(jì)算電阻的方法，詳見(jiàn)8.5節(jié)內(nèi)容。
6.9 體積電阻和表面電阻轉(zhuǎn)換
★在測(cè)試過(guò)程中，使用屏蔽箱在進(jìn)行體積電阻和表面電阻轉(zhuǎn)換時(shí)，必須把電源關(guān)閉后進(jìn)行檔位轉(zhuǎn)換，否則會(huì)導(dǎo)致電壓沖擊到主機(jī)無(wú)法顯示或損壞。

體積表面電阻率測(cè)試儀
Meet the standards:
GB1410 "test method for insulation resistance, volume resistance coefficient and surface resistance of solid electrical insulating materials"
Test method for DC resistance or conductance of insulating materials by D257 ASTM
Summary
The instrument can measure high resistance, and measuring current. Large scale integrated circuit of Intel company is adopted, which makes the instrument small size, light weight and high accuracy. High resistance meter and current with dual 3.1/2 bit digital direct display resistance. The measurement range is from 1 * 104 to 1 * 1018, which is the most wide measurement range and the highest accuracy. The current measurement range is 2 * 10-4 ~ 1 * 10-16A. The test voltage of the machine is adjustable for 10/50/100/250/500/1000V. The surface volume resistivity has a high precision, rapid, good stability, easy reading for inspection to the anti electrostatic products such as anti-static shoes, anti electrostatic plastic and rubber products, computer room anti static floor resistance value and insulating materials electrical and electronic products insulation resistance measurement.
Technical index:
1, resistance measurement range: 1 * 104 ~ 1 * 1018.
2, the current measurement range is: 2 x 10-4A ~ 1 x 10-16A
3, double headers: 3.1/2 LED display
4, built-in test voltage: 10V, 50V, 100V, 250, 500, 1000V
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: 10/50/100/250/500/1000V arbitrary switching
8, power supply form: 220V AC, 50HZ, power consumption of about 5W
9, instrument size: 285mm * 245mm * 120 mm
10, quality: about 2.5KG
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. Can be seen from Ohm's law, due to the current I is inversely proportional to the resistance, and not directly proportional to, so the resistance to the display value is nonlinear, the resistance is infinite, the current is zero, namely header zero is infinity, near the scale is very close, the resolution is too low. The whole scale is nonlinear. And since the measurement of different resistance, the voltage V will be some changes, so the average 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 changes in the measured voltage or current change of V and I, so even if the measurement voltage, the measured resistance and power voltage change has little influence on the results, the measuring accuracy is very high (patent), according to the theory of the error can do zero, while the actual error can be done a few thousandths or very few.
Typical applications:
1 measure the resistance value of the anti-static shoes and conductive shoes.
2. Measure the resistance and resistivity of the antistatic material.
3. Measure the system resistance value of the computer room floor.
4, measuring the resistance of insulating materials (rate)
5, photoelectric diode dark current measurement
6, physics, optics and materials research
Standard configuration:
1, test equipment: 1 sets
2, power line: 1
3, measuring line: 3 (shielding wire, test wiring, grounding wire)
4, the instruction manual: 1 copies
Using method:
6.1 connect the power cord.
Make sure the power supply is 220VAC/50Hz
6.2 power on
The current resistance range in 104 stalls, the voltage range of 10V, and then boot.
6.3 zero adjustment
In the open at both ends of the Rx, zero to ammeter display 0000. Note: at both ends of the "RX" does not open, such as connected to the resistor or measured object tune zero measurement will produce great error. Generally after a zero adjustment in the test process does not need to adjust the zero. After shutdown.
6.4 link line
Connect the test line, the test line will be connected to the host and the shield box, the measurement of the volume resistance when the test button dial to the Rv side, the test surface resistance when the test button to dial the Rs edge. Then boot.
6.5 select the appropriate measurement voltage
9:28 voltage selector switch on the rear panel, pay attention to, in the testing process do not arbitrarily change the voltage measurement may due to excessive voltage or current too damaged device under test or test instrument.
6.6 test
Measurements from low-grade gradually pulling to high-grade, each allocated a slightly stay 1 ~ 2 seconds to enable observation of the digital display, when more than the range of measurement instrument measured resistance, resistance meter display "1", at this time, should continue to be instrument dials to range higher position, when the measurement apparatus with display value should be stopped, the number is multiplied by the grade is measured resistance values. When there is a display of the number, do not go to a higher level, no measuring instrument will be over range, the machine within the protection circuit to work, the accuracy of the instrument measurement will drop.
6.7 after the test resistor current range to pull "104", voltage range to 10V after power off
* measured every one shall be the range switch dial back the 104 "zero" gear range position so as not to boot or measurement shorted sometimes damage the instrument.
6.8 measurement of the current and the measurement of more than 1015 of the ultra high resistance measurement of the current use of the Ohm's law in order to voltage divided by the current calculation of the resistance of the method, see the 8.5 section.
6.9 volume resistance and surface resistance conversion
] in the testing process, using shielding box in the volume resistance and surface resistance conversion must be the power off after the shift conversion, otherwise it will lead to the main impulse voltage

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