Volume surface resistance tester（GEST-121）

Compliant with standards:

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

ASTM D257-99Test Method for DC Resistance or Conductivity of Insulation Materials

GB/T 10581-2006Test method for resistance and resistivity of insulating materials at high temperatures

GB/T 1692-2008Vulcanized rubber Determination of Insulation Resistance

GB/T 2439-2001Vulcanized rubber or thermoplastic rubber Determination of Conductivity and Dissipation Properties and Electrical Resistance

GB/T 12703.4-2010The Textile Industry Evaluation of electrostatic performance Part 4: Electrical resistivity

GB/T 10064-2006_Test Method for Measuring Insulation Resistance of Solid Insulation Materials

GB 1672-1988Determination of volume resistivity of liquid plasticizers

I. Overview

This instrument can measure both high resistance and micro current. Adopting the United StatesInThe company's large-scale integrated circuits,Make the instrument small in size, light in weight, and high in accuracy. The digital LCD directly displays the resistance value and current. Quantity limit from1×10⁴Ω ～1×10¹⁸ Ω is currently the digital ultra-high resistance measuring instrument with the widest measurement range and highest accuracy in China. The current measurement range is2×10^-4 ～1×10^-16A. The internal test voltage is10V/50V/100V/250V/500V/1000VAdjustable arbitrarily. This instrument has high accuracy, fast display, good stability, and convenient reading, Suitable for measuring the volume and surface resistance values of various insulation materials in the shapes of rubber, plastic, film, powder, liquid, solid, and paste. This instrument can not only measure resistance, but also directly measure weak currents.

2、 Main features

Wide range of resistance measurement 0.01×10⁴Ω ～1×10¹⁸Ω

The current measurement range is 2×10^-4Ａ ～1×10^-16Ａ

Small size, light weight, high accuracy

Dual display of resistance and current

Good and stable performance, easy to read

All test voltages(10V/50V/100/250/500/1000V)During testing, the resistance results are read directly, eliminating the inconvenience of using old-fashioned high resistance meters to multiply coefficients at different testing voltages or ranges. This makes measuring ultra-high resistance as simple as using a multimeter to measure ordinary resistance samples.

Can measure both ultra-high resistance and microcurrent

3、 Technical indicators

1Resistance measurement range: 0.01×10⁴Ω ～1×10¹⁸Oh.

2The current measurement range is: 2×10^-4A～1×10^-16A

3, Show show square Formula: Digital LCD display

4Built in test voltage:10VThe50VThe100V、250、500The1000V

5Basic accuracy:1% (*note)

6Usage environment: temperature0℃～40℃Relative humidity<80%

7Internal testing voltage:10V/50V/100/250/500/1000VSwitch freely

8Power supply form:AC 220V，50HZ, power consumption approximately5W

9Instrument size: 285ｍｍ× 245ｍｍ×120 mm

10Quality: about2.5KG

4、 Working principle

According to Ohm's law, the measured resistanceRxEquivalent to applying voltageVDivide by the current passing throughIThe working principle of traditional high resistance meters is to measure voltageVFixed, by measuring the current flowing through the sampling resistorITo obtain the resistance value. From Ohm's law, it can be seen that due to the currentIIt is inversely proportional to the resistance, not directly proportional, so 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 is ∞, and the scales near it are very dense, with low resolution. The entire scale is non-linear. Also, due to the measurement of different resistances, their voltagesVThere may also be some changes, so ordinary high impedance meters have poor accuracy and low resolution.

This instrument measures the voltage at both ends of a resistor simultaneouslyVAnd the current flowing through the resistorIBy using internal large-scale integrated circuits to calculate the voltage divided by current, and then passing the obtained result throughA/DAfter conversion, display the resistance value as a number, even if it is the voltage across the resistanceVAnd the current flowing through the resistorIIt changes simultaneously, and the displayed resistance value is not affected by the measured voltage like a regular high resistance meterVDue to changes in voltage or current I, even if there are changes in the measured voltage, measured resistance, power supply voltage, etc., they have little impact on the results and have high measurement accuracy()In theory, the error can be zero, while in reality, the error can be a few thousandths or tens of thousands.

Typical Applications

1Measure the resistance, volume resistance, and surface resistance of insulation materials(rate)

2Measure the resistance and resistivity of anti-static materials

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

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

5Measurement of Dark Current in Photodiodes

6Physics,Optics and Materials Research

Standard configuration:

1Testing instruments:1Taiwan

2、.power cord:1article

3Measurement line:3Root (shielded wire, test wiring, grounding wire)

4User Manual:1copy

5Standard configuration1Solid electrode set

Note:

This instrument is equipped with different measuring electrodes (fixtures) to measure different materials(Solid, powder or liquid)The volume resistivity and surface resistivity or conductivity of * comply with national standardsGB1410－2006Solid electrical insulation materials - Test methods for insulation resistance, volume resistivity, and surface resistance,ASTM D257Standard requirements for DC resistance or conductivity testing methods of insulation materials.