塑料表面體積電阻率測(cè)量?jī)x  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(shuō)明書(shū)：1份

注：本儀器配不同的測(cè)量電極（夾具）可以測(cè)量不同材料不（固體、粉體或液體）的體積電阻率和表面電阻率或電導(dǎo)率

塑料表面體積電阻率測(cè)量?jī)x   技術(shù)要求

01電阻測(cè)量范圍1?104Ω ～1?1018 Ω

 02電流測(cè)量范圍2?10-4Ａ ～1?10-16Ａ

 03顯 示 方 式數(shù)字液晶顯示

 04內(nèi)置測(cè)試電壓10V 、50V、100V、250、500、1000V（任意切換）

 05基本準(zhǔn)確度1% (*注)

 06使用環(huán)境溫度：0℃～40℃，相對(duì)濕度<80%

 07供電形式AC 220V，50HZ，功耗約5W

 08儀器尺寸285ｍｍ? 245ｍｍ? 120 mm

 09儀器質(zhì)量約5KG

10儀器可連續(xù)工作 8 小時(shí)

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

應(yīng)用范圍：

a    材料高阻測(cè)試測(cè)量如防靜電產(chǎn)品（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）電阻值的檢測(cè)；

b    材料體積電阻(率)和表面電阻(率)測(cè)量；

c    電化學(xué)和材料測(cè)試,以及物理,光學(xué)和材料研究;

d    微弱電流測(cè)量如光電效應(yīng)和器件暗電流測(cè)量。

使用說(shuō)明

（一）應(yīng)滿足下例要求：

1、測(cè)試電壓范圍應(yīng)包括：100V~500V

2、測(cè)量范圍應(yīng)包括：1?106Ω~1?1017Ω

3、阻值大于1012Ω時(shí)，測(cè)量誤差應(yīng)小于?20%，阻值不大于1012Ω時(shí)，測(cè)量誤差應(yīng)小于?10%。

4、輸入接線的絕緣電阻應(yīng)大于儀器輸入電阻的100倍。

5、測(cè)試時(shí)試樣及測(cè)量導(dǎo)線應(yīng)有良好。

6、儀器應(yīng)定期進(jìn)行校驗(yàn)。

（二）準(zhǔn)備工作：

1、取被測(cè)液體（如：增塑劑）試樣50ml。

2、試樣應(yīng)在溫度23?2℃，相對(duì)濕度65?5%的條件下處理2小時(shí)以上。

（三）測(cè)試步驟：

1、測(cè)試溫度23?2℃，相對(duì)濕度65?5%，無(wú)外界電磁場(chǎng)干擾環(huán)境中進(jìn)行。

2、測(cè)試時(shí)對(duì)試樣所加電壓為100V~500V的直流電壓，選擇電壓檔次。

3、將試樣倒入高壓電極內(nèi)，使液面剛好和環(huán)電極下緣全部接觸為止。

4、將充分放電后的試樣和電極，按固體（液體）體積及表面電阻率測(cè)試儀要求接線。

外電極（高壓電極）接高固體（液體）體積及表面電阻率測(cè)試儀的高壓輸出端。

內(nèi)電極（測(cè)量電極）接固體（液體）體積及表面電阻率測(cè)試儀的測(cè)量端。

中電極（環(huán)電極）接固體（液體）體積及表面電阻率測(cè)試儀的接地端。

5、儀器預(yù)熱30分鐘，穩(wěn)定后調(diào)整儀器（調(diào)零），加上試驗(yàn)1分鐘，讀取電阻指示值，然后放電1分鐘，再測(cè)試一次，以二次的算術(shù)平均值作為試驗(yàn)樣品電阻指示值。

（四）計(jì)算方法：

按式（1）計(jì)算體積電阻系數(shù)（pv）,計(jì)算結(jié)果取二位有效數(shù)字。

（五）注意事項(xiàng)：

1、測(cè)定電極必須放置在高絕緣的墊板上。

2、測(cè)定電極在測(cè)試前后，均應(yīng)做好清洗工作，特別是三只電極的支撐件不得受到試樣的污染

使用注意事項(xiàng)

高阻測(cè)量一定要嚴(yán)格按使用方法步聚進(jìn)行，否則有可能造成儀器永久損壞或電人。

1 應(yīng)在“Rx”兩端開(kāi)路時(shí)調(diào)零（主機(jī)開(kāi)機(jī)）

  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，但改變測(cè)量電壓后可能要重新調(diào)零。

2 禁止將“Rx”兩端短路，以免微電流放大器受大電流沖擊

3 在測(cè)試過(guò)程中不要隨意改動(dòng)測(cè)量電壓，

  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，而且有的材料是非線性的，即電壓與電流是不符合歐姆定律，有改變電壓時(shí)由于電流不是線性變化，所以測(cè)量的電阻也會(huì)變化。

4 測(cè)量時(shí)從低次檔逐漸拔往高次檔

  每撥一次稍停留1～2秒以便觀察顯示數(shù)字，當(dāng)有顯示值時(shí)應(yīng)停下，記錄當(dāng)前的數(shù)字即是被測(cè)電阻值。若顯示“1”時(shí)，表示欠量程應(yīng)往高次檔拔。直到有顯示數(shù)字時(shí)為止。當(dāng)有顯示數(shù)字時(shí)不能再往高次檔撥，否則有可能損壞儀器(機(jī)內(nèi)有過(guò)電流保護(hù)電路)。除104 Ω檔之外，當(dāng)顯示低于1.99，表示過(guò)量程應(yīng)換低檔!

5 大部分絕緣材料，特別是防靜電材料的電阻值在加電壓后會(huì)有一定變化而引起數(shù)字變化

  由于本儀器的分辯率很高，因而會(huì)引起顯示值的末尾幾位數(shù)也變化，這不是儀器本身的問(wèn)題，而是被測(cè)量對(duì)象的導(dǎo)電機(jī)理復(fù)雜而使得阻值有些變化。在這種情況下往往取2位有效數(shù)就夠了。

6 接通電源后，手指不能觸及高壓線的金屬部分

    本儀表有二連根線:高壓線(紅)和微電流測(cè)試線。在使用時(shí)要注意高壓線，開(kāi)機(jī)后人不能觸及高壓線，以免電人或麻手。

7 測(cè)試過(guò)程中不能觸摸微電流測(cè)試端

  微電流測(cè)試端最怕受到大電流或人體感應(yīng)電壓及靜電的沖擊。所以在開(kāi)機(jī)后和測(cè)試過(guò)程中不能與微電流測(cè)試端接觸，以免損壞儀表。

8 在測(cè)量高阻時(shí)，應(yīng)采用屏蔽盒將被測(cè)物體屏蔽.

  在測(cè)量大于1010 Ω以上時(shí)，為防止外界干擾面而引起讀數(shù)不穩(wěn)。

9 每次測(cè)量完時(shí)應(yīng)將量程開(kāi)關(guān)撥回“104 ”檔再進(jìn)行下次測(cè)試

  在測(cè)量時(shí)應(yīng)逐漸將量程開(kāi)關(guān)撥到高阻檔，測(cè)量完時(shí)應(yīng)將電流電阻量程、電壓量程開(kāi)關(guān)撥回低檔。以確保下次開(kāi)機(jī)時(shí)量程開(kāi)關(guān)處在低阻量程檔。

Standard configuration:

1. Testing instrument: 1 unit

2. Power cord: 1

3. Measurement wires: 3 wires (shielded wire, test wire, grounding wire)

4. User manual: 1 copy

Note: This instrument, equipped with different measuring electrodes (fixtures), can measure the volume resistivity, surface resistivity, or conductivity of different materials (solid, powder, or liquid)

technical requirement

01 Resistance measurement range 1 ? 104 Ω~1 ? 1018 Ω

02 Current measurement range 2 ? 10-4A~1 ? 10-16A

03 Display Method: Digital LCD Display

04 Built in test voltage: 10V, 50V, 100V, 250, 500, 1000V (can be switched freely)

05 Basic accuracy 1% (* note)

06 Operating environment temperature: 0 ℃~40 ℃, relative humidity<80%

07 Power supply form AC 220V, 50HZ, power consumption about 5W

Instrument size: 285mm ? 245mm ? 120mm

The quality of the 09 instrument is about 5KG

10 instruments can work continuously for 8 hours

Typical applications

1. Measure the resistance (rate) of insulation materials

2. Measure the resistance and resistivity of anti-static materials

3. Measure the system resistance value of the raised floor used in the computer room

4. Measure the resistance value of anti-static shoes and conductive shoes

5. Measurement of Dark Current in Photodiodes

6. Physics, Optics, and Materials Research

Application scope:

A material high resistance test measurement, such as detecting the resistance value of anti-static products (anti-static shoes, anti-static plastic rubber products, computer room anti-static raised floor, etc.);

Measurement of material volume resistance (rate) and surface resistance (rate);

Electrochemical and material testing, as well as physics, optics, and materials research;

Weak current measurement such as photoelectric effect and device dark current measurement.

instructions

（1）The following requirements should be met:

1. The testing voltage range should include: 100V~500V

2. The measurement range should include: 1 ? 106 Ω~1 ? 1017 Ω

3. When the resistance value is greater than 1012 Ω, the measurement error should be less than ? 20%, and when the resistance value is not greater than 1012 Ω, the measurement error should be less than ? 10%.

4. The insulation resistance of the input wiring should be greater than 100 times the input resistance of the instrument.

5. The sample and measuring wire should be in good condition during testing.

6. The instrument should be calibrated regularly.

（2）Preparation work:

1. Take 50ml of the tested liquid (such as plasticizer) sample.

2. The sample should be treated for more than 2 hours under the conditions of a temperature of 23 ? 2 ℃ and a relative humidity of 65 ? 5%.

（3）Test steps:

1. The test is conducted in an environment with a temperature of 23 ? 2 ℃, a relative humidity of 65 ? 5%, and no external electromagnetic field interference.

2. When testing, apply a DC voltage of 100V~500V to the sample and select the voltage level.

3. Pour the sample into the high-voltage electrode until the liquid level is in full contact with the lower edge of the ring electrode.

4. Connect the fully discharged sample and electrode according to the requirements of the solid (liquid) volume and surface resistivity tester.

Connect the external electrode (high-voltage electrode) to the high-voltage output terminal of the high solid (liquid) volume and surface resistivity tester.

The inner electrode (measuring electrode) is connected to the measuring end of the solid (liquid) volume and surface resistivity tester.

Connect the middle electrode (ring electrode) to the grounding terminal of the solid (liquid) volume and surface resistivity tester.

5. Preheat the instrument for 30 minutes, adjust the instrument (zero) after stabilization, add 1 minute of test, read the resistance indication value, discharge for 1 minute, and then test again, taking the arithmetic mean of the two times as the resistance indication value of the test sample.

（4）Calculation method:

Calculate the volume resistance coefficient (pv) according to equation (1), and take the two significant digits of the calculation result.

（5）Attention:

1. The measuring electrode must be placed on a highly insulated pad.

2. Before and after testing, the electrodes should be cleaned properly, especially the supporting parts of the three electrodes should not be contaminated by the sample

Precautions for use

High resistance measurement must be strictly carried out according to the usage method steps, otherwise it may cause permanent damage to the instrument or electric shock.

1. Zero should be adjusted when the "Rx" ends are open circuited (when the host is turned on)

If connected to a resistance box or the object being measured, zeroing the measurement will result in significant errors. Generally, after one zeroing, there is no need to zero again during the testing process, but resetting may be necessary after changing the measured voltage.

2. It is prohibited to short-circuit the "Rx" terminals to prevent the microcurrent amplifier from being impacted by high currents

Do not arbitrarily change the measured voltage during the testing process,

Randomly changing the measured voltage may damage the tested device or instrument due to excessive voltage or current, and some materials are nonlinear, meaning that voltage and current do not conform to Ohm's law. When changing the voltage, the measured resistance will also change because the current does not change linearly.

During measurement, gradually shift from low gear to high gear

Pause for 1-2 seconds each time to observe the displayed number. When there is a display value, stop and record the current number as the measured resistance value. If "1" is displayed, it indicates that the underrange should be shifted to higher gears. Until there are displayed numbers. When there are displayed numbers, do not dial to higher gears, otherwise it may damage the instrument (there is an overcurrent protection circuit inside the machine). Except for the 104 Ω gear, when the display is below 1.99, it indicates that the overtravel should be shifted to a lower gear!

The resistance value of most insulation materials, especially anti-static materials, will change to some extent after applying voltage, causing numerical changes

Due to the high resolution of this instrument, the last few digits of the displayed value may also change. This is not a problem with the instrument itself, but rather due to the complex conductivity mechanism of the measured object, which causes some changes in the resistance value. In this case, taking 2 significant digits is often sufficient.

After connecting the power supply, fingers should not touch the metal part of the high-voltage line

This instrument has two connecting wires: the high-voltage wire (red) and the microcurrent testing wire. When using, pay attention to the high-voltage wires. After turning on the machine, do not touch the high-voltage wires to avoid electric shock or numbness.

During the testing process, do not touch the microcurrent testing terminal

The microcurrent testing end is most afraid of being impacted by high currents, human induced voltages, and static electricity. Therefore, it is not allowed to come into contact with the microcurrent testing terminal after startup and during testing to avoid damaging the instrument.

When measuring high resistance, a shielding box should be used to shield the object being measured

To prevent unstable readings caused by external interference when measuring above 1010 Ω.

After each measurement, the range switch should be turned back to the "104" position before conducting the next test

During measurement, the range switch should be gradually turned to the high resistance range. After measurement, the current resistance range and voltage range switches should be turned back to the low range. To ensure that the range switch is in the low resistance range range mode during the next startup.

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