I. Product Overview

Currently, conventional methods are widely used in the power system.QJ44Our dual-armed direct current bridge measures contact resistance, while the testing current for such bridges is onlymAIt is difficult to detect defects in the reduction of the cross-sectional area of the conductor in the loop. When measuring the contact resistance of the conductive loop of high-voltage switches, the measured values are several times larger due to the influence of the oil film and oxidation layer between the contacts, failing to truly reflect the contact resistance values. In response to this, the new power department standards...DL/T845.4—2004 "General Technical Conditions for Resistance Measurement Devices: Circuit Resistance Meters"No Chinese content provided.Inspection ProcedureJJG1052-2009《Loop Resistance Meters, Direct Resistance Meters Calibration ProcedurePlease provide the Chinese content to be translated.MeasurementIsolationSwitchesCircuit BreakerWaitThe measurement current for contact resistance is not less than direct current.100AThe maintenance time for low current is not less thanThe provisions of the 60S.Ensure accurate test results.

This instrument's operating panelAdoptedHuman-friendly ergonomic design, tailored to operational habits.Utilizing high-frequency switching power supply and digital circuit technology，Measurement of circuit resistance for switch control equipment. Test current is in accordance with the recommended DC standard by the national standard.100A。AvailablePlease provide the Chinese content that you would like translated into American English.FlowIn the 100A condition, the loop resistance was directly measured; the test results are as follows:Large-screen LCDLCD display with data storage, output printing, time setting, and other functions; comes with a 50A range for user selection; customizable test time, up to 599S, significantly longer than the standard 60S; is a domesticPlease provide the Chinese content that needs to be translated.. OneAchieveA 0.01μΩ resolution and highly stable contact resistance tester, outperforming imported high current micro-ohmmeters.Meets the requirements for on-site high-voltage switch maintenance by power and electricity supply departments and circuit resistance testing at high-voltage switch factories.

Design Purpose

Applicable for highLowPress switch contact (circuit) resistanceNo Chinese content provided for translation.Our high-precision measurement is also applicable to other scenarios requiring high current and micro-resistance measurements.

III. Execution Standards

Four: Performance Features

High CurrentUtilizing the latest switch-mode power supply technology, it can continuously output high currents for extended periods, overcoming the drawbacks of instantaneous current in pulse power supplies. It effectively pierces the oxidation film on switch contacts, yielding favorable test results.

2. High Stability:Under severe interference conditions, the subsequent data behind the LCD screen can maintain stability.±1 character range, stable readings, and good repeatability.

High Precision:Adopting dual high-speed16 Sigma-DeltaAD Sampling, new digital signal processing technology, high-resolution0.01μΩ，IsCurrentlyDomesticPlease provide the Chinese content to be translated.. OneAchieve0.01μΩ resolutionNo Chinese content provided, please provide the news content to be translated.Our contact resistance tester is highly stable and outperforms imported high current micro-ohmmeters.

4. Smart Technology:ImportHigh-performancePlease provide the Chinese content that needs to be translated into American English.CPU automatically switches according to signal size during measurementRangeEnsure test accuracy.The over-temperature protection circuit automatically stops the output current when the instrument exceeds the set temperature, ensuring safe operation of the instrument.

5. High QualityAll critical components are imported, and the impact of environmental temperature on measurement results is effectively eliminated through cleverly designed temperature compensation circuits. The use of military-grade connectors enhances vibration resistance.

6. Powerful FeaturesElectric Current50A、100APlease select freely; the testing time is:5s~The 599s can be set within 599 seconds, overcoming the shortcomings of other similar instruments that cannot set measurement time or have an insufficient continuous working time, far surpassing the performance of other similar instruments.

User-friendly Human-Machine InterfaceThe rotating mouse input data conveniently and quickly, allows for self-setting of the instrument's date and time, saves measurement data in real-time, and prints measurement results immediately.

8. USB Data Transfer:ThroughUSBInterface will store measured data intoUSB flash drive, combined with host software for further analysis and processing of measurement data.

9. User-friendly:Compact and lightweight, easy to carry.