Moisture resistant microbial penetration tester

1、 Main standards of rubber volume surface resistivity tester are as follows:

GB / T 1410-2006 test methods for volume and surface resistivity of solid insulating materials

ASTM D257-99 test methods for DC resistance or conductivity of insulating materials

GB / T 2439-2001 vulcanized or thermoplastic rubber - Determination of electrical conductivity and dissipation properties - resistivity

GB / T 10581-2006 test methods for resistance and resistivity of insulating materials at high temperature

GB / T 1692-2008 vulcanized rubber - Determination of insulation resistivity

GB / T 12703.4-2010 Textiles - Evaluation of electrostatic properties - Part 4: resistivity

GB / T 10064-2006 test methods for determination of insulation resistance of solid insulating materials

2、 Overview of rubber volume surface resistivity tester:

This instrument can measure both high resistance and micro current. Large scale integrated circuit of Intel company is adopted, which makes the instrument small in size, light in weight and high in accuracy. Digital liquid crystal display resistance value and current directly. The limit of measurement ranges from 1 × 104 Ω to 1 × 1018 Ω. It is a digital ultra-high resistance measuring instrument with wide measuring range and high accuracy. The current measurement range is 2 × 10-4 ～ 1 × 10-16a. The internal test voltage is adjustable at 10V / 50V / 100V / 250V / 500V / 1000V. This instrument has the advantages of high precision, rapid display, good stability and convenient reading. It is suitable for the measurement of volume and surface resistance of various insulating materials of rubber, plastic, film, carpet, fabric, powder, liquid, solid and paste shapes.

3、 Technical indexes of rubber volume surface resistivity tester: 1

1. Resistance measurement range: 0.01 × 10 4 Ω ～ 1 × 10 18 Ω.

2. The current measurement range is 2 × 10-4a ～ 1 × 10-16a

3. Dual meter display: 3.1/2-bit LED display

4. Built in test voltage: 10V, 50V, 100V, 250, 500V, 1000V

5. Basic accuracy: 1%

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

7 internal test voltage: 10 / 50 / 100 / 250 / 500 / 1000V

8. Power supply form: AC 220 V, 50 Hz, power consumption about 5 W

9. Instrument size: 285mm × 245mm × 120mm

10. Weight: About 2.5kg

4、 The working principle of rubber volume surface resistivity tester is as follows

According to Ohm's law, the measured resistance Rx is equal to the applied voltage V divided by the passing current I. The working principle of the traditional high resistance meter is that the measured voltage V is fixed, and the resistance value is obtained by measuring the current I flowing through the sampling resistance. It can be seen from Ohm's law that since the current I is inversely proportional to the resistance rather than proportional to it, the displayed value of the resistance is nonlinear, that is, when the resistance is infinite, the current is zero, that is, the zero position of the meter head is ∞. The scale near it is very dense, and the resolution is very low. The whole scale is nonlinear. Because the voltage V will change when measuring different resistance, the common high resistance meter has poor precision and low resolution.

Best121 digital high resistance meter can simultaneously measure the voltage V at both ends of the resistance and the current I flowing through the resistance. Through the internal large-scale integrated circuit, the voltage divided by the current is calculated, and then the obtained result is displayed in digital form after a / D conversion. Even if the voltage V and current I of the two ends of the resistance change at the same time, the resistance value displayed is not as high as usual The resistance meter changes due to the change of measured voltage V or current I, so even if the measured voltage, measured resistance, power supply voltage, etc. have little impact on its results, its measurement accuracy is very high. Theoretically speaking, its error can be zero, but the actual error can be several thousandths or tens of thousands.

5、 Typical applications of rubber volume surface resistivity meter are as follows

1. Measure the resistance of antistatic shoes and conductive shoes

2. Measure the resistance and resistivity of antistatic materials

3. Measurement of system resistance of raised floor in computer room

4. Measurement of insulation resistance (rate)

5. Dark current measurement of photodiode

6. Physics, optics and materials research

6、 Standard configuration of rubber volume surface resistivity meter:

1. Test instrument: 1 set

2. Power cord: 1

3. Measuring line: 3 (shielding wire, test wiring, grounding wire)

4. Instruction manual: 1 copy

5. Product certificate: 1 copy

Product list of Beiguang Jingyi instrument and Equipment Co., Ltd

Product name product model remarks

Computer control of voltage breakdown tester bdjc-10-100kv

Best-121 liquid crystal display of volume surface resistivity tester

Sliding friction and wear tester M-200 rubber, plastics, composites

Universal tensile testing machine WDW metal, nonmetal material

Dielectric constant and dielectric loss tester gdat-a solid liquid material

Bwk-300 computer for hot deformation Vicat thermometer

Plastic ball indentation hardness tester bq-96 liquid crystal

Brt-400z computer for melt flow rate measuring instrument

Sponge foam indentation hardness tester BYX-2000 computer

Sponge foam falling ball rebound instrument BLQ-500 LCD

Sponge foam fatigue impact tester BPL-2000 LCD

Foam tensile strength tester bls-1000 liquid crystal

By-a incubator of sponge compression deformation testing machine

Sponge foam cutting machine HMQG-500 machinery

BRS-3 computer for horizontal and vertical combustion tester

BDH computer of arc resistance tester

Leakage tracking tester bld-600 high voltage, low voltage

Needle flame tester by-a national standard

National standard of burning wire tester br-a

Low temperature brittle impact testing machine for rubber and plastics

Simply supported beam impact testing machine BJZ