一、體積電阻率測(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)In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。數(shù)字液晶直接顯示電阻值和電流。電阻量限從1×104Ω ～1×1018 Ω，是目前國(guó)內(nèi)測(cè)量范圍zui寬，準(zhǔn)確度zui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10V/50V/100V/250V/500V/1000V任意可調(diào)。本儀器具有精度高、顯示迅速、性好穩(wěn)定、讀數(shù)方便， 適用于橡膠、塑料、薄膜、及粉體、液體、及固體和膏體形狀的各種絕緣材料體積和表面電阻值的測(cè)定。
二、體積電阻率測(cè)試儀典型應(yīng)用
1、測(cè)量絕緣材料電阻(率)
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)量防靜電鞋、導(dǎo)電鞋的電阻值
5、光電二極管暗電流測(cè)量
6、物理,光學(xué)和材料研究
三、體積電阻率測(cè)試儀技術(shù)指標(biāo)
1、電阻測(cè)量范圍：0.01×104Ω ～1×1018Ω。
2、電流測(cè)量范圍：2×10-4A～1×10-16A
3、顯 示 方 式： 32位LED液晶屏顯示
4、內(nèi)置測(cè)試電壓： 10V 、50V、100V、250、500、1000V
5、基本準(zhǔn)確度：1%
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： 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10KG
四、體積電阻率測(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，通過測(cè)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(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(jì)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(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()，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分之幾。
五、體積電阻率測(cè)試儀標(biāo)準(zhǔn)配置：
1、測(cè)試儀器：1臺(tái)
2、.電源線：1條
3、測(cè)量線：3根（屏蔽線、測(cè)試接線、接地線）
4、使用說明書：1份
產(chǎn)品保修售后服務(wù)承諾：
一、安裝調(diào)試：協(xié)助試驗(yàn)機(jī)的安裝，負(fù)責(zé)試驗(yàn)機(jī)的運(yùn)輸、調(diào)試。
二、驗(yàn)收標(biāo)準(zhǔn)：試驗(yàn)機(jī)按訂貨技術(shù)附件進(jìn)行驗(yàn)收。終驗(yàn)收在買方進(jìn)行，對(duì)用戶提供的試樣進(jìn)行試驗(yàn)，并提供測(cè)試報(bào)告。
三、培訓(xùn)：安裝調(diào)試同時(shí)，在儀器操作現(xiàn)場(chǎng)一次性免費(fèi)培訓(xùn)操作人員2-3名，該操作人員應(yīng)是由需方選派的長(zhǎng)期穩(wěn)定的員工，培訓(xùn)后能夠?qū)υO(shè)備基本原理、軟件使用、操作、維護(hù)事項(xiàng)理解和應(yīng)用，使人員能夠獨(dú)立操作設(shè)備對(duì)樣品進(jìn)行檢測(cè)、分析，同時(shí)能進(jìn)行基本的維護(hù)。
四、軟件升級(jí)：終生免費(fèi)提供新版本控制軟件。
五、保修：
1、設(shè)備保修兩年，終身售后服務(wù)，一年內(nèi)非人為損壞的零部件免費(fèi)更換，保修期內(nèi)接到用戶邀請(qǐng)后，zui遲響應(yīng)時(shí)間為2小時(shí)內(nèi)，在與用戶確認(rèn)故障后，我公司會(huì)在48小時(shí)內(nèi)派工程師到達(dá)現(xiàn)場(chǎng)進(jìn)行免費(fèi)服務(wù)，盡快查清故障所在位置和故障原因，并向用戶及時(shí)報(bào)告故障的原因和排除辦法。
2、保修期內(nèi)人為損壞的零部件按采購(gòu)（加工）價(jià)格收費(fèi)更換。
3、保修期外繼續(xù)為用戶提供優(yōu)質(zhì)技術(shù)服務(wù)，在接到用戶維修邀請(qǐng)后3天內(nèi)派工程師到達(dá)用戶現(xiàn)場(chǎng)進(jìn)行維修。并享有優(yōu)惠購(gòu)買零配件的待遇?！?br />4、傳感器過載及整機(jī)電路超壓損壞不在保修范圍內(nèi)。
六、售后管理：
我公司實(shí)現(xiàn)計(jì)算機(jī)化管理，實(shí)行客戶定期回訪制度，定期復(fù)查設(shè)備的工作情況，定期指導(dǎo)用戶對(duì)設(shè)備進(jìn)行保養(yǎng)和檢測(cè)，以便設(shè)備正常運(yùn)轉(zhuǎn)，跟蹤客戶的設(shè)備使用情況，以便及時(shí)對(duì)設(shè)備進(jìn)行維護(hù)
I. overview of volume resistivity tester
This instrument can measure both high resistance and micrometer current. Adopting the large-scale integrated circuit of American In company, the instrument is small in size, light in weight and high in accuracy. Digital LCD displays resistance and current directly. The resistance limit is from 1 * 104 to 1 * 1018, and it is the highest digital measurement instrument with the highest accuracy and the highest accuracy in china. The current measurement range is 2 * 10-4 to 1 * 10-16A. In machine test voltage is 10V/50V/100V/250V/500V/1000V, adjustable at any time. The instrument has high precision, good stability, fast display, easy reading, and is suitable for various rubber, plastics, film, powder, liquid, and solid and pasty insulating material shape determination of volume and surface resistance value.
Two 、 typical application of volume resistivity tester
1. Measure the resistance (rate) of insulating materials
2. Measure the resistance and resistivity of antistatic materials
3. Measure the system resistance value of the movable floor of the computer room
4. Measure the resistance of antistatic shoes and conductive shoes
5 、 photodiode dark current measurement
6, physics, optics and materials research
Three, volume resistivity tester technical indicators
1. Resistance measurement range: 0.01 * 104 to 1 * 1018.
2 、 current measuring range: 2 * 10-4A to 1 * 10-16A
3, display mode: 32 bit LED LCD screen display
4, built-in test voltage: 10V, 50V, 100V, 250, 500, 1000V
5, basic accuracy: 1%
6, use environment: temperature: 0 ~ 40 DEG C, relative humidity <80%
7 、 test voltage inside the machine: 10V/50V/100/250/500/1000V switch at any time
8, power supply form: AC, 220V, 50HZ, power consumption of about 5W
9, instrument size: 285mm * 245mm * 120 mm
10, quality: about 10KG
Four. The principle of volume resistivity tester
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 by measuring the voltage V, and by measuring the current I through the sampling resistance, the resistance is obtained. 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. Because of the different resistance measurement, the voltage V will change, so the ordinary high resistance meter is of poor precision and 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.
Five, volume resistivity tester standard configuration:
1 、 test instrument: 1 sets
2. Power cord: 1
3, measuring lines: 3 (shielded wire, test wiring, grounding wire)
4, instruction manual: 1 copies
Product warranty, after-sales service commitment:
Installation and debugging: to assist the installation of test machines, responsible for testing machine transport, commissioning.
Two 、 acceptance standard: test machine according to order Technical Annex for acceptance. The final acceptance shall be tested by the purchaser at the purchaser's site, and provide test reports.
Three, training: installation and commissioning at the same time, the instrument operation on-site one-time free training 2-3, the operating personnel shall be appointed by the long-term stability of the staff training to the equipment basic principle, software use, operation, maintenance issues, understanding and application, so that the personnel can operate the equipment independently to detect samples, at the same time can carry on the basic analysis and maintenance.
Four, software upgrades: lifelong free to provide new version control software.
Five, warranty:
1, the equipment warranty of two years, lifelong customer service service, within one year of non-human damage free replacement parts, the warranty period the user received the invitation, the latest response time is 2 hours, with the user to confirm the fault, our company will send engineers arrived at the scene for free within 48 hours of service, to identify the fault location and the cause of the fault as soon as possible, and timely report to the user fault and maintenance.
2, the warranty period, for the damaged parts, according to purchasing (processing) price charges replacement.
3, the warranty period to continue to provide quality technical services for the users, after receiving maintenance within 3 days after inviting users to send engineers to the user site maintenance. And enjoy preferential treatment to buy spare parts.
4, sensor overload and the whole circuit overpressure damage is not within the scope of warranty.
Six 、 after sale management:
I realize the computer management, the implementation of customer regular ephone return visit system, work regular check equipment, regular ephone guide users to maintain and test the equipment, so that the normal operation of equipment, track customer equipment usage, so that timely maintenance of equipment
