Handheld Contact Loop Resistance Tester

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Handheld Contact Loop Resistance Tester

This HM6090X circuit resistance tester is used for on-site maintenance of high-voltage switches in power and supply departments, as well as circuit resistance testing in high-voltage switch factories. The resistance value of the test sample can be measured at a current of 100A/200A.

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Description

Technical Parameters

HM6090X01

Product Overview

The HM6090X Contact Resistance Tester is suitable for on-site maintenance of high-voltage switches in power supply departments and for circuit resistance testing in high-voltage switch manufacturing plants. It can measure the resistance value of the test sample at currents of 100A/200A.

Application Scenarios

Power System Maintenance: Measure contact resistance of main contacts in high/low-voltage switchgear, circuit breakers, and isolating switches.

Industrial Equipment Inspection: Test resistance values at relay contacts, cable solder joints, and busbar connections.

Field Operations: Conduct portable testing at substations, distribution rooms, and other environments without fixed power sources.

HM6090X02

HM6090X03

1) Handheld portable design with compact size and no external power supply required, ideal for outdoor mobile operations.

2) Entire unit controlled by high-speed chip for high automation and simple operation.

3) Powered by built-in lithium battery with fast charging support.

4) Features automatic measurement function and wire connection status detection.

5) Output current up to 100A, high measurement frequency, fast testing speed, and high measurement accuracy.

6) Features a high-definition LCD screen with no visual blind spots for enhanced clarity.

7) Comprehensive protection functions include overcurrent, short-circuit, overheat, and battery over-discharge safeguards.

8) Built-in power-off data storage retains 100 sets of historical test records for instant retrieval.

9) Voice announcement function automatically reports measurement results upon test completion.

10) Optional Bluetooth interface supporting BLE 4.0 protocol transmission.

Parameter	Specification
Model	HM6090X
Output Current	adjustable from 50A/100A
Measurement Range	10pΩ~10mΩ(50A);10μΩ~10mΩ(100A)
Resolution	0.1μΩ
Accuracy	(indication x 0.5%+0.2 μΩ)
Test Time	1s/5s/10s/30s/60s optional(depending on gear)
Measurement frequency	≥400 times(100AV1mQ/1s mode, fully charged)

Q: What is a loop resistance tester used for?

A: :It is primarily employed to accurately measure the contact resistance of high-voltage electrical equipment such as switches, circuit breakers, and busbar connectors.

Q: How does it differ from measuring resistance with a standard multimeter?

A: Test current: Multimeters utilise milliampere-level currents, insufficient to penetrate the oxide layer on contact surfaces, resulting in a 'false' contact resistance reading. A loop resistance tester outputs high currents of 100A/200A, reflecting true resistance values under operational conditions.
Accuracy: Multimeters have resolution down to the ohm level, whereas loop resistance testers achieve micro-ohm resolution with exceptional precision.
Principle: Loop resistance testers employ the four-wire method, eliminating the influence of lead resistance.

Q: Why do readings fluctuate or jump during testing?

A:Poor contact; faulty test leads; external interference.

Q: Why must four wires (four-wire method) be used for measurement? Would two wires suffice?

A: Two-wire method: The measured resistance incorporates both the test lead resistance and contact resistance, resulting in significant error.
Four-wire method: Completely eliminates the influence of test lead resistance, yielding precise results.

Note: For detailed operations, refer to the product manual.

Why Choose HM6090X ? ✔ Industry - Standard Compliance ✔ Ultra - Portable Design ✔ Precision & Reliability Boost your efficiency in electrical maintenance with the ultimate handheld solution!

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