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HM6090-100A Low Resistance Ohmmeter

The tester is the special test equipment for measuring the contact resistance and loop resistance of some devices such as switch, circuit interrupter, and transformer and so on.

◆ strong anti-interference capability
◆ Stable reading and good repeatability
◆ Adjustable testing current and low ripple.


Nowadays Power Systems widely use model QJ44 DC double arm bridge to measure contact resistance (DC resistance and Loop resistance of high-voltage circuit breaker) while the minimum current of such model is 1mA which hardly find the decrease of cross-sectional area of transformers’ conductive circuit conductor. The measurement of loop resistance of high voltage switchgear is affected by oil layer and oxide between static and dynamic contact port, so the resistance measurement value will be several times larger, and cannot reflect the true value of contact resistance. Therefore, the Ministry of Electric Power in national standards SD301-88 "AC 500KV Electrical Equipment Transfer and Preventive Test Procedure" and new version of " Electrical Equipment Preventive Test Procedure" stipulate that the testing current of circuit breaker and isolating switch contact resistance is not less than 100A to ensure accurate test results.

HM6090-100A Low Resistance Ohmmeter measures up to the latest power system standards--DL/T845.4-2004 designed for measuring loop resistance of Switching Control Equipment using High-frequency switching power supply technology and digital circuit technology. Test current of the Tester is DC 100A which is recommended in the national standards. The tester can measure the loop resistance at this value and display the result in digital and with function of storage, printing and time setting. Another 50A is optional. It is high precision and good stability and can meet most power systems’ requirements in onsite high-voltage switches maintenance and high-voltage switches factory loop resistance measurement. 


1. High current, adopts new power techniques, can output current long time and continuously , overcome the malpractice of instantaneous current of the impulse type power, can effectively break through the oxide film of the switch contact, get accurate test results.

2. High stability, under strong interference, the last number displayed by the LCD within the range of ±1, with steady reading and good reproducibility.

3. High precision: adopts double channels high-speed 16bits ΣΔ AD to sample, digital signal processing technique, the maximum resolution up to 0.01μΩ.

4. Intelligent: use high performance CPU, system can switch the measurement range according the size of the signal when testing, ensure the accuracy. The over-temperature protection circuit can auto stop output the current when the device exceeds the rated temperature to ensure the safety.

5. High quality: key components adopts imported components, uses temperature compensating circuit in perfect design which eliminates the effect to test results by temperature, meanwhile strengthen the resistance to shock by using the military connector.

6. Powerful: current could be 50A, 100A measurement time 5s~599s, more powerful than other equipment.

7. Friendly man-machine interface: enter the data by rotating mouse, easy and convenient, can set the data, time by yourself, save and print the test results in time.

8. USB dump: Store the data to U disk by USB interface, combining PC software for further analysis and processing of the measurement data.

9. Easy to use: small in volume, light in weight. 

Technical parameter

1.Measuring range: 0 ~ 2999.9μΩ

2.Resolution:   0~99.99, 0.01μΩ;

           100.0~2999.9, 0.1μΩ

3.Measured current: DC 50A,100A Afixed output

4.Accuracy:  ±(0.5% rd+2d)

5.Continuous working time: 5s~599s

6.Dsplay : large screen Chinese LCD display

7.Communication mode: USB

8.Power supply: AC220V ± 10% 50Hz

9.Power of the whole machine: 600W

10.Maximum storage record: 200

11.Service conditions: Temperature -10℃-40℃,humidity≤ 80%RH

12.Denmension: 360 * 300 * 250 mm

13.Weight: 8kg (not including accessory)



1. Are you manufacture ?

Yeah, we are manufacturer professional in design and produce high voltage test equipment with nearly 20 years experience .


2. When can I get the price ?

We usually quote within 6 hours after get your inquiry . If you are very urgent to get price, please feel free to contact us by Wechat&Whatsapp +86-13720145441 or send us by email, so that we will regard your inquiry priority .


3. Do you supply OEM?

 Of course, we supply OEM.


4. What about leading time for production ?

Honestly , it depends on order quantity and the product . Usually lead time is within 7 working days after deposit .


5. What is your terms of delivery ?

We accept EXW, FOB, CFR, CIF, DDU, etc . You can choose the one which the most convenient and cost effective for you .


6. What’s your payment terms :

TT payment, L/C at sight, Paypal, Western union, etc.


7. How much is the shipping cost and time ?

This is depend on the size and weight of your product, and the method of shipping ( by sea/ by ari/ by Express) and your designated port . Kindly afford us above information to check shipping cost and time for you .


8. What’s the warranty period ?

Our warranty period is one year free and lifelong maintenance .

If produce damage within one year ( not man-made damage ), we will send you spare parts for replacement .  After one year, maintenance is paid service .

9. What kind of Certificate you can provide ?

We can provide CE mark, ISO9001 quality certificate the third part Calibration Certificate (CNAS), factory test report .


10. Do you have Technical Backup to all customers from different countries ?

Surely, we have rich experience engineer to afford professional technical support and quick response to your technical questions .

We are manufacture with rich on site testing experience and understand how to deal with your problems . And our engineer can visit your company to afford technical support face to face if necessary .

Factory test and shippment

We will do factory test for every product before devilering, to ensure qualified of the product.

We will pack the product carefully and choose suitbale shippment for client,to ensure the safe arrival.

Installation and commissioning

we provide installation and commissioning assistance to get you up and running. Domestically within China or internationally, we will be there to support you. During the installation, integration and operation of a new test system, a variety of special services are involved. If it ’ s necessary, we can offer oversea commissioning service for our clients.

Service and support

In any fault case of our product, we will arrange engineer to deal with your problem within 24hours

Service guarantee

Contact purchase

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