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Summary of Contents for Terra Exploration Group EZ Res Pro
- Page 1 Terra EZ Res 2/3/4 Probes Earth R/P Analyzer Technical User's Guide Copyright 2016 Terra Exploration Group Austin, Texas, USA 512-280-9600 www.TexGru.com...
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Page 2: Table Of Contents
CONTENTS Warning ....................1 I．Introduction .................. 3 II．Technical Specifications ............. 4 1. Base Conditions and Working Conditions ......4 2. General Specification ............. 4 3. Intrinsic error and performance indicators under base conditions ................... 8 III． Tester Structure ................. 8 IV．LCD Display ................ -
Page 3: Warning
Warning Thanks your purchase Terra EZ Res Pro Digital Earth Analyzer. best results, thoroughly read and completely understand this User's Guide. The tester conforms to IEC61010 in design, production and testing. Under all circumstances, pay special attention to the ... - Page 4 Do not operate device in the presence of flammables, as a spark spark could initiate an explosion or fire. Do not use device if test wires are damaged with uninsulated wire exposed. Do not expose the device to high temperatures, high humidity or ...
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Page 5: I．introduction
2, 3 or 4 probe arrays. The EZ Res Pro possesses an unique function of wire resistance verification, anti-interference capability and the ability to adapt to the environment---all to ensure high precision, high stability and reliability for prolonged and complicated measurements. -
Page 6: Technical Specifications
II．Technical Specifications 1. Working Conditions Working Influence Description Conditions Ambient Temp 15F-105F ＜80% Ambient Humidity Working Voltage 9V±1.5V Auxiliary Earth ＜30kΩ Resistance Interference Voltage ＜20V Interference Current ＜2A Electrode Distance a＞5d when measuring R Electrode Distance a＞20h when measuring ρ 2. - Page 7 Soil Resistivity: 0.00Ωm-9000kΩm, automatic shift Backlight Blue screen backlight, suitable for dim light use 4-digital super-large LCD display, blue screen Display Mode backlight Measuring During measurement, LED flash indicator, LCD count Indicator down display, progress bar indicator LCD Frame 5"×3"mm Dimension LCD Window 4.9"×2.6"...
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Page 8: Intrinsic Error And Performance Indicators Under Base Conditions
Standby: about 20mA (Backlight shut off) Power Boot-up and with backlight: about 45mA (25mA Consumption without backlight) Measurement: about 100mA (Backlight shut off) Total weight: 12 lbs. (including package) Tester: 3.2 lbs (including batteries) Weight Testing wires: 5.3 lbs Copper-clad probes (4pcs) 5 lbs F-115 F, below 80%rh Working... -
Page 9: Tester Structure
100.0kΩm-999.9kΩm 100Ωm a:1 m-100m, π=3.14) 1000kΩm-9000kΩm 1kΩm Earth Voltage AC 0.0-600V ±2%rdg±3dgt 0.1V Note: 1. When rC max or rP max, additional error≤±3%rdg±5dgt. (rC max: 4kΩ+100R＜50kΩ, rP max: 4kΩ+100R＜50kΩ) 2. When 5V interference voltage, additional error≤±5%rdg±5dgt. III． Tester Structure... -
Page 10: Lcd Display
1. LCD 2. Button area 3. Rotary switch for function selection 4. RS232 interface 5. Interface for testing wires 6. P(S) interface: Voltage probe 7. C(H) interface: Current probe 8. E interface: Earth probe 9. ES interface: Auxiliary earth probe 10. - Page 11 1. Progress bar (Dynamic display of testing progress) 2. Alarm symbol (Displays with open alarm function, flashes when alarm value is met) 3. Exceed voltage symbol (Displays when measured voltage exceeds 30V---use caution and maintain safety) 4. AC symbol 5. Data hold symbol (Press MEM to hold data) 6.
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Page 12: Measuring Principle
V．Measuring Principle 1. Voltage to ground measurement utilizes average value rectification method. 2. Earth resistance measurement uses fall-of-potential method. AC constant current I is applied between the measurement object E earth probe and C current probe, and calculating the potential difference V between E earth probe and P voltage probe, calculating the earth ground R according to formula R=V/I. -
Page 13: Operation Methods
E5：Variation due to contact electrode resistance 4. Soil resistivity (ρ) is measured by 4-probe method (ex:Wenner method): An AC current I runs between E earthing probe and C current electrode. The potential difference V between P voltage electrode and ES auxiliary earthing probe, the potential difference V is divided by AC current I to give earth resistance R. -
Page 14: 4．Earth Voltage Measurement
AC voltage measurement refers to general commercial AC voltage measurement. By determining the difference between earthing voltage, the meter can be used for testing below 600V AC line voltage. As shown below: First, connect test wires P with ES interface. Second, connect test wires with tested line, then rotate FUNCTION rotary switch to “EARTH VOLTAGE”... -
Page 15: 5．4-Wires Precise Earth Resistance Measurement
5．4-wires Precise Earth Resistance Measurement testing earth resistance, first confirm earth voltage i.e. the voltage between C and E or P(s) and ES must under 20V. The meter NOISE symbol shows when the earth voltage exceeds 5V, which may produce resistivity measurement error. If high earth voltage found,... -
Page 16: 6．3-Wires Earth Resistance Measurement
6．3-Wires Earth Resistance Measurement 3-wires measurement: As shown below, short-circuit ES and E interface. The operation of meter is the same with 4 wires measurement but, the 3-wires method cannot eliminate the influence of line resistance, or the influence of contact resistance between meter and testing wires or between testing wires and probes. - Page 17 2-wires method: This method is a simple method for measurement that does not use an auxiliary earthing probe. Use the earth electrode with the minimal existing earth ground resistance value as auxiliary earth electrode and connect two simple testing wires (in which C , E-ES interfaces are in short circuit).
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Page 18: 8．Soil Resistivity Measurement
measured earthing object and that of commercial earthing object, that is: R=RX＋re In which: R is the tester reading value; RX is the earth ground resistance value of measured earthing object; re is the earth ground resistance value of common earthing object like commercial use power system. -
Page 19: 9．Backlight Control
press “SET” button to move the cursor, press “ ”or “ ” button to change current data value (a range:1m-100m), then press and hold “SET” button to save the set a value, and return to soil resistivity testing mode. After setting value, in soil resistivity testing mode, press the“START”... -
Page 20: 12．Data Reading/Deletion
Voxler Earth Imaging Software. The Interpolated Data Transfer Spreadsheet and Voxler Earth Imaging Software are available as a package from Terra Exploration Group. The Interpolated Data Transfer Spreadsheet provides the ability to view Voxler information in 2D or 3D modes. -
Page 21: Accessories
VIII．Accessories Main electronics unit in protective waterproof case. Black barrel zipper bag containing: red/black wires on reels 50m each, green/yellow wires on reels 25 m each, two jumper wires--red/yellow and black/green, two 50m measuring tapes, five steel probes in canvas zippered bag, ten probe-marking flags, Easy Resistivity User's Guide, Technical User's Guide and Warranty Information sheet.
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