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Summary of Contents for MarMonix MEG825
- Page 1 All 2/3/4 Wires Combined Clamp onGroundTester MEG825 www.Marmonix.co...
- Page 2 Promote your assessment Product usermanual...
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Page 3: Table Of Contents
Promote your assessment Product usermanual Table of Contents 1. INTRODUCTION 2 2. TECHNOLOGY SPECIFICATION3 2.1. B ONDITIONS AND ORKING ONDITIONS 2.2. G ENERAL PECIFICATION 2.3. R & A ANGE CCURACY ASIC ERROR UNDER REFERENCE CONDITION 3. TESTER STRUCTURE7 4. LCD DISPLAY8 5. -
Page 4: Base Conditions And 2.2. General Specification
Promote your assessment Product usermanual 6.12. A & T LARM ETTING 6.13. D & S TORE 6.14. D CCESS ELETE 7. BATTERY& CHARGE 24 8. BLUETOOTH SOFTWARE OPERATION 25 8.1. S OFTWARE NTRODUCE 8.3. S OFTWARE SAGE 8.4. S OFTWARE NINSTALL 9. -
Page 5: Precaution For Use
◆ Do not place and store the meter in high temperature&humidity or dewy places and under direct sunlight for a long time. ◆ If the tester get wet, please make dry before storage ◆ When the tester displays battery low voltage symbol “ ”，please charge in time. www.marmonix.co rights reserved for MARMONIX Corporation... - Page 6 PC through the USB interface. The communication software can realize the functions of reading, consulting, saving, reporting and printing of the historical record data. Widely used in power, telecommunications, meteorology, oil fields, construction, lightning protection and industrial electrical equipment. www.marmonix.co rights reserved for MARMONIX Corporation...
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Page 7: Technology Specification
Electrode Distance when a＞5d a＞5d measuring R Electrode Distance when a＞20h a＞20h measuring ρ 2.2. General Specification Model MEWOI3300 MEWOI3300-B 0.00Ω~20kΩ 0.00Ω~200kΩ Earth Resistance Range 0.00Ωm~9999kΩm 0.00Ωm~9999kΩm Soil Resistivity Range 0.000mA~20A 0.000mA~45A Earth Current Range www.marmonix.co rights reserved for MARMONIX Corporation... - Page 8 Measurement below AC 600V Data hold function: “HOLD” symbol display, and will auto store the Data Hold & Store hold data, which can store 500 groups max Data Access Data read function: “READ” symbol display www.marmonix.co rights reserved for MARMONIX Corporation...
- Page 9 Withstanding Voltage AC 3700V/rms. (Between circuit and outside shell) Electromagnetic IEC61326(EMC) Features IEC61010-1(CAT Ⅲ 300V、CAT IV 150V、Pollution 2); IEC61010-031; IEC61557-1(Earth resistance); Protection Type IEC61557-5(Soil resistivity); JJG 366-2004(Grounding resistance meter) JJG 1054-2009(Clamp grounding resistance meter) www.marmonix.co rights reserved for MARMONIX Corporation...
- Page 10 1Ω measure earth resistance 2.00kΩ~20.00kΩ ±4%rdg±5dgt 10Ω *20.0kΩ~200.0kΩ ±4%rdg±5dgt 100Ω 0.10Ω~20.00Ω ±2%rdg±5dgt 0.01Ω Selection method 20.0Ω~200.0Ω ±2%rdg±5dgt 0.1Ω measure earth resistance 200Ω~2000Ω ±2%rdg±5dgt 1Ω 0.00Ωm~99.99Ωm 0.01Ωm Soil Resistivity According to the measurement 100.0Ωm~999.9Ωm 0.1Ωm www.marmonix.co rights reserved for MARMONIX Corporation...
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Page 11: Tester Structure
±(2.5%rdg＋0.5A) 0.1A Note: 1.rC max or rPmax: additive error≤±5%rdg±5dgt (rC max: 4kΩ+100R＜50kΩ, rP max: 4kΩ+100R＜50kΩ) when interference by 2.5V voltage, the additive error ≤±5%rdg±5dgt 2. * symbol description only for MEWOI3300-B 3. Tester Structure www.marmonix.co rights reserved for MARMONIX Corporation... -
Page 12: Function Button
Data hold and saved; When access data can delete Enter into read data record. Enter to parameters setting, access Background brightness 1-5 nex data record,confirm delete data record 4. LCD Display www.marmonix.co rights reserved for MARMONIX Corporation... - Page 13 4.8. Configure parameters 4.9. Bluetooth communication symbol 4.10. Charge symbol 4.11. Battery power symbol 4.12. Alarm symbol 4.13. Data hold & save symbol 4.14. Measure result 4.15. Measure result unit 4.16. Background brightness 4.17. Real time www.marmonix.co rights reserved for MARMONIX Corporation...
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Page 14: Measurement Principle
R=V/I. In order to ensure the accuracy of the test, the 4-wire method is used to increase the ES-assisted ground pole. In actual test, the ES and E are clamped at the same point of the grounding body. www.marmonix.co rights reserved for MARMONIX Corporation... - Page 15 ρ=2πaR(Ωm). If the electrode distance of C(H)-P(S) is equal to P(S)-ES (both a) is Wenner method. In order to convenience the calculation, please make electrode distance a far more than embedding depth h, generally should meet a>20h, as shown below. www.marmonix.co rights reserved for MARMONIX Corporation...
- Page 16 I The meter will measure I The measured current I can be got by the following formula. Where: n is the turn ratio of the secondary side and the primary side coil. www.marmonix.co rights reserved for MARMONIX Corporation...
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Page 17: Operation Method
In the clamp and test situation, display “0L Ω ”, indicate that the tested resistance exceed the tester measure range, as figure 8. Intermittent "beep-beep-beep--", indicate that the measured resistance exceeds the resistance alarm threshold. www.marmonix.co rights reserved for MARMONIX Corporation... -
Page 18: 2-Wires Simple Test
Re value as the auxiliary grounding pole, so that the meter reading is closer to the true value. In measuring, please choose metal water pipe and metal fire hydrant as auxiliary grounding pole. www.marmonix.co rights reserved for MARMONIX Corporation... -
Page 19: 3-Wires Earthr
The oxide layer on the surface of the tested grounded body needs to be removed in the measurement. www.marmonix.co rights reserved for MARMONIX Corporation... -
Page 20: 4- Wires Precisee
Measure the total grounding resistance of a complex grounding system with a distance d should be the distance from the largest diagonal of the grounding system. The test leads cannot be entangled with each other in testing; otherwise the test accuracy may be affected. www.marmonix.co rights reserved for MARMONIX Corporation... - Page 21 R of the grounded body to be tested. After testing, Press “HOLD” key to save the earth resistance value R. As shown below, The tested earth resistance value is 1.05Ω, the tester has stored 8 groups of data. www.marmonix.co rights reserved for MARMONIX Corporation...
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Page 22: Clamp 3- Wiress
Soil resistivity ρ is a determining factor of grounding resistance of grounding body. Different soil properties with different soil resistivity, as the same soil, and the soil resistivity will change significantly due to differences in temperature and water content. Therefore, in order to have a www.marmonix.co rights reserved for MARMONIX Corporation... - Page 23 The soil homogeneity can be checked by changing the a value to design a suitable grounding electrode. Space distance of the auxiliary grounding rods setting: After wires connection, press function select www.marmonix.co rights reserved for MARMONIX Corporation...
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Page 24: Earth Currentm
“0.000mA”, as shown follow figure. At this time, open the clamp jaw to clamp the measured ground lead to read the current value. If the tester display “0L A” indicate that the measured current exceed the tester upper range, shown as follow figure. www.marmonix.co rights reserved for MARMONIX Corporation... - Page 25 Promote your assessment Product usermanual There is intermittent "beep-beep-beep--" sound, indicating that the measured current exceeds the setting current alarm threshold. www.marmonix.co rights reserved for MARMONIX Corporation...
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Page 26: Earth Voltagem
AC voltage measurement. As shown below figure: meter, auxiliary grounding rods, testing wires are all connected, press the function select key MODE switch to “U” and start to test, LCD will display the test results. www.marmonix.co rights reserved for MARMONIX Corporation... -
Page 27: Backlight Control
“HOLD” symbol, and store and number 1 group. Press “HOLD” key again to cancel hold state. As shown below figure: hold the tested soil resistivity 53.38Ωm, as the 157 groups data storag www.marmonix.co rights reserved for MARMONIX Corporation... -
Page 28: Data Access/Delete
7.1. When the battery voltage drops to DC 3.5V±0.1V, the meter displays the “ ” symbol and indicates that the battery is low. Please charge it in time. The charger indicator will light up in red in charging, and light up in green indicate full. www.marmonix.co rights reserved for MARMONIX Corporation... -
Page 29: Bluetooth Software Operation
"Buletooth - Avaliable Device", the surrounding Bluetooth devices will appear. Click the Bluetooth name corresponding to the tester to start connecting the Bluetooth of the tester.If the connection is not the tester will appear failure prompt. www.marmonix.co rights reserved for MARMONIX Corporation... - Page 30 8.3.2.The history data module contains three functions: Select Query Device, Select Query Version and Query History Data. www.marmonix.co rights reserved for MARMONIX Corporation...
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Page 31: Software Uninstall
Use the uninstall function of mobile phone to uninstall 9. Accessories Tester 1 PCS Tool case 1 PCS Auxiliary ground rod 4 PCS 4 PCS: each for red 20m, black 20m, Test Wires yellow 10m, and green 10m www.marmonix.co rights reserved for MARMONIX Corporation... - Page 32 Simple testing Wire 2 PCS: each for red 1.6m and black 1.6m USB communication cable 1 PCS 5V Charger 1 PCS Test ring (5.1Ω) 1 PCS Manual /Warranty Card / Qualification Certificate 1 SET www.marmonix.co rights reserved for MARMONIX Corporation...
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