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HM 2571 Grounding Resistance Tester

The structure of high strength aluminum alloy case, the circuit to prevent the frequency, radio frequency interference detection method using phase-locked loop tracking and accompanied by synchronous switched capacitor filter,

Use of DC / AC technology will transform the low-frequency constant DC current into AC for the measurement.

Introduction

The tester abandons the traditional way of making power by artificial, uses  advanced large scale integrated circuits,applies DC / AC transformation technology ,makes three side buttons, four-terminal measurement button to combine into a model of the new grounding resistance measuring instrument. 

The principle of the tester is to make DC into AC low-frequency constant current by the DC / AC converter inside, through the auxiliary grounding electrode C and E composition of the measured object circuit to generate AC voltage drop measured object, sent by the auxiliary grounding electrode P AC amplifier and then displayed through the detector head into the table. With magnification switch, available in three different capacity limits: 0 ~ 2Ω, 0 ~ 20Ω, 0 ~ 200Ω.

Application

The tester applies post and telecommunications, railway, telecommunications, mining and other sectors of the grounding resistance measurement of the various devices and the measurement of low resistance of the conductor resistance; this tester can also measure soil resistivity and ground voltage. 

Main features

• the structure of high strength aluminum alloy case, the circuit to prevent the frequency, radio frequency interference detection method using phase-locked loop tracking and accompanied by synchronous switched capacitor filter, the instrument has good anti-jamming capability.

• use of DC / AC technology will transform the low-frequency constant DC current into AC for the measurement.

• Allow auxiliary grounding resistance in the 0 ~ 2KΩ (RC), 0 ~ 40KΩ (RP) between the change not affect measurement results.

• No manual adjustment of the instrument balance, 3 (1 / 2)-bit LCD display, in addition to resistance measurement, it can also measure low resistance conductor resistance, soil resistivity and the AC ground voltage.

• Should the test loop unreasonable header displays "1" overflow, consistent with conventional measurement practices. 

Technique Parameter

1) Operating Conditions

Ambient temperature: 0 ℃ ~ +45 ℃

Relative humidity: ≤ 85% RH

2) Measuring range and the constant value (RMS)

Resistance: 0 ~ 2Ω (10mA), 2 ~ 20Ω (10mA), 20 ~ 200Ω (1mA)

Voltage: AC 0 ~ 20V

3) Measurement accuracy and resolution

Accuracy: 0 ~ 0.2Ω ≤ ± 3% ± 1d

0.2Ω ~ 200Ω ≤ ± 1.5% ± 1d

1 ~ 20V ≤ ± 3% ± 1d

Resolution: 0.001Ω, 0.01Ω, 0.1Ω, 0.01V

4) Errors caused by auxiliary earth resistance and ground voltage measurement

• Allow auxiliary grounding resistance RC (C1 and C2 between)

0 ~ 2Ω, 2 ~ 20Ω ≤ 1KΩ

20 ~ 200Ω ≤ 2KΩ

RP (P1 and P2 between) <40KΩ error ≤ ± 5%

• Allow to voltage (rms frequency) ≤ 5V error ≤ ± 5%

5) Power

maximum power dissipation≤ 2W

DC: 8 × 1.5V (AA, R6) Battery

AC: 220V/50Hz

6) Size and weight

Host Size: 220mm × 200mm × 105mm

Host Weight: ≤ 1.4kg 



F A Q

 

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 info@cablehipot.com, 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 .

Technique Data

1) Operating Conditions

Ambient temperature: 0 ℃ ~ +45 ℃

Relative humidity: ≤ 85% RH

2) Measuring range and the constant value (RMS)

Resistance: 0 ~ 2Ω (10mA), 2 ~ 20Ω (10mA), 20 ~ 200Ω (1mA)

Voltage: AC 0 ~ 20V

3) Measurement accuracy and resolution

Accuracy: 0 ~ 0.2Ω ≤ ± 3% ± 1d

0.2Ω ~ 200Ω ≤ ± 1.5% ± 1d

1 ~ 20V ≤ ± 3% ± 1d

Resolution: 0.001Ω, 0.01Ω, 0.1Ω, 0.01V

4) Errors caused by auxiliary earth resistance and ground voltage measurement

• Allow auxiliary grounding resistance RC (C1 and C2 between)

0 ~ 2Ω, 2 ~ 20Ω ≤ 1KΩ

20 ~ 200Ω ≤ 2KΩ

RP (P1 and P2 between) <40KΩ error ≤ ± 5%

• Allow to voltage (rms frequency) ≤ 5V error ≤ ± 5%

5) Power

maximum power dissipation≤ 2W

DC: 8 × 1.5V (AA, R6) Battery

AC: 220V/50Hz

6) Size and weight

Host Size: 220mm × 200mm × 105mm

Host Weight: ≤ 1.4kg 

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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