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Summary of Contents for Mastech MS2302
- Page 1 MS2302 Digital Earth Resistance Tester OPERATING INSTRUCTION...
- Page 2 Unit 8, 21/FL, Yen Sheng Center, 64 Hoi Yuen Road, Kwun Tong, Kowloon, Hong Kong. Tel: 852 - 23430007 Fax:852 - 23436217 E-mail: info@p-mastech.com SHENZHEN HUAYI MASTECH CO., LTD. East Wing, 8/F., Block 4, Saige Science and Technology Industrial Garden, Hua Qiang Bei Rd. Shenzhen, China Tel: 0755 - 83769588 Fax: 0755 - 83768150 E-mail: info@mastech.cn...
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Page 3: Table Of Contents
Users’ Guide for Earth Ground Resistance Tester Contents Contents 1. Safety………………………......................…….1 2. Description.……………………....................……..4 ……………………..................……..4 2.1 Meter Description …………………….....................……..8 2.2 Display 3. Specifications ……………………...................……..10 …………...................………………..10 3.1 Range and Precision …………….................……………..10 3.2 Measurement Method ……………………..............……..10 3.3 Using Temperature and Humidity ………………...............…………..10 3.4 Storing Temperature and Humidity ……………....................……………..11 Battery... - Page 4 Users’ Guide for Earth Ground Resistance Tester Contents ……………....................…………..……11 3.8 Accessories 4. Operation Instructions……………................………….……12 ……………................………….……12 4.1 Testing the Earth Voltage ………………........……….……12 4.2 Testing the Earth Resistance by the bi-electrode method ………………........……………15 4.3 Testing the Earth Resistance by the tri-electrode method ………....................……………………17 4.4 Data Storage …………........………............…………18...
- Page 5 Users’ Guide for Earth Ground Resistance Tester Safety 1. Safety The earth resistance tester (hereinafter referred to as meter) , which is up to GB4793.1, the requirement on the safety of electronic measurement instruments, is designed and manufactured in accordance with EN 61010-1, EN61010-2-030 pollution, and the maximum voltage for the meter to probe can not exceed CAT ...
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Page 6: Safety
Users’ Guide for Earth Ground Resistance Tester Safety Danger Check if the rotating switch is set to a proper position before measurement Never use the meter in the vicinity of explosive gases, steam or dust. Never connect wires or probes with wet hands or when the surface of the meter is humid. Don’t touch the testing wires or probes in a measurement. - Page 7 Users’ Guide for Earth Ground Resistance Tester Safety Caution Check if the total length of testing wires is inserted into the port before a measurement. Take out of the batteries from the cartridge if the meter will not be used or will be stored for long. Don’t expose the meter to sunlight, high temperature, humidity or dew Clean the meter with neutral solvents or wet cloth instead of abrasives or organic solvents Lay the meter in store only when it is dry.
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Page 8: Description
Users’ Guide for Earth Ground Resistance Tester Description 2. Description The meter is applicable to the testing of the earth resistance of the power supply wires, distribution wires inside a room, electrical equipment or appliance, which can done in two measurement modes: Bi-poles or Tri-poles, and it also can be used to measure the earth voltage. - Page 9 Users’ Guide for Earth Ground Resistance Tester Description （5）LCD It is used to display the data obtained and different symbols.
- Page 10 Users’ Guide for Earth Ground Resistance Tester Description...
- Page 11 （6）Key of READ It is used to read the data obtained. （7）Key of MEMO It is used to store the data obtained. （8）Key of Measure It is used to start or cease a measurement of resistance. （9）Key of It is used to select a memory for storage of data obtained. Users’...
- Page 12 （10）Key of MAX/MIN/AVG It is used to switch between the measurement of maximum, minimum and average. （11）Key of ENTER It is used to confirm a storage or reading of data. （12）REL It is used to select relative measurement. （13）Key of It is used to select a memory for storage of data obtained.
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Page 13: Display
Description 2.2 LCD （1）simulating bar （2）Display of data obtained （3）Display of memory used for data storage. Descriptions of symbols on LCD: TEST： a test is being progressed ＞LIMIT： limit has been exceeded... - Page 14 Users’ Guide for Earth Ground Resistance Tester Description MAX： Maximum MIN： Minimum AVG： Average REL： Relative measurement READ： Data reading MEMO： Data is being put into a memory USED： There are data in memories. 2POLE： Bi-pole method is being used for measurement of resistance. 3POLE：...
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Page 15: Specifications
Users’ Guide for Earth Ground Resistance Tester Specifications 3. Specifications Air temperature:23 5℃ Relative humidity: <75% 3.1 Range Specifications Range Precision Earth Ground Resistance 10Ω ±(1%rdg+3d) 4000Ω ±(4% rdg +4d) Earth Voltage AC50V（50/60HZ） ±(2% rdg +4d) 3.2 Measurement method Constant Current Conversion is used for the measurement of earth resistance, with the frequency of the testing current about 800HZ and the size about 3mA. -
Page 16: Battery
Users’ Guide for Earth Ground Resistance Tester Specifications 3.5 Battery Six 1.5V AA batteries 3.6 Volume 330 X 125 X 265 3.7 Weight 3.45kg 3.8Supplied accessories 3 test leads (one 15-meter-long red lead, one 10-meter-long green lead and one 5-meter-long black lead ) , 2auxiliary earth bars -11-... -
Page 17: Operation Instructions
Users’ Guide for Earth Ground Resistance Tester Operation Instruction 4.Operation Instruction Danger In measurement of earth voltage, do not exert voltage above AC220V on the measurement port. In measurement of earth resistance, there will occur potential of about 50 V between port E and S or between ports E and C, therefore, protect yourself from electrical shock. - Page 18 Users’ Guide for Earth Ground Resistance Tester Operation Instructions （1）Test Connection Diagram -13-...
- Page 19 Users’ Guide for Earth Ground Resistance Tester Operation Instructions （2）Measurement of earth voltage. Earth voltage measurement should be done before measurement of earth resistance to check the amount of earth voltage, as voltage more than 10 V is likely to cause larger error in the measurement of earth resistance. In this case, cut the measured object from the power supply and wait until the earth voltage drop for another measurement.
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Page 20: Testing The Earth Resistance By The Tri-Electrode Method
Users’ Guide for Earth Ground Resistance Tester Operation Instructions 4.3 Measurement of the resistance by Tri-pole method Potential Drop Method is used by the meter for the measurement of the earth resistance. Particularly, RX, the earth resistance is figured out by first allowing I, the rated current, to flow between E, the object measured (the earth rods) and C, the current pole, then measuring V, the potential difference between E and P, the voltage pole. - Page 21 Users’ Guide for Earth Ground Resistance Tester Operation Instructions Drive deep the Auxiliary Earth Bars P, C in straight line into the ground and ensure that the bars are between 5 and 10 meters apart. Connect ends of the test leads (black, red and green) , which respectively from the ports E, P, C, separately to the object measured, auxiliary earth rod P and auxiliary earth C.
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Page 22: Data Storage
Users’ Guide for Earth Ground Resistance Tester Operation Instructions Attention: ＞ LIMIT4000Ω displayed on LCD warns that the auxiliary earth resistance of the auxiliary earth rods is so high that the current can not flow across the meter. Check if the test leads become loose and the amount of the earth resistance of the auxiliary earth rods. -
Page 23: Data Reading
Users’ Guide for Earth Ground Resistance Tester Operation Instructions 4.5 Data Reading Data reading function of the meter allows you to check the historical measurement stored in the meter. （1）When the meter is standing by, press MEMO to call the display for data storage, with “MEMO” glittering at the lower right corner of LCD;... -
Page 24: Max/Min/Avg Measurement
Users’ Guide for Earth Ground Resistance Tester Operation Instructions 4.7 MAX/MIN/AVG Measurement Press the key of MAX/MIN/AVG to switch the modes between the measurements of maximum, minimum, average and normal, corresponding to each of which a symbol is shown on LCD. （1）When MAX is selected, the LCD shows the maximum of all the data. -
Page 25: Battery Replacement
Users’ Guide for Earth Ground Resistance Tester Operation Instructions 5. Replacement of Batteries Danger Never replace the batteries while the meter is damp. Never replace the batteries while the meter is being used. Switch off the meter and disconnect the test leads and earth rods before replacements to avoid electrical shock. - Page 26 Users’ Guide for Earth Ground Resistance Tester Operation Instructions -21-...
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