Terra Exploration Group EZ Res Pro Technical User Manual Download Page 2

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CONTENTS

Warning .............................................................................................. 1

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Introduction .................................................................................. 3

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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

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Tester Structure ......................................................................... 8

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LCD Display .............................................................................. 9

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Measuring Principle .................................................................. 10

VI. Operation Methods ....................................................................

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Switch On/Off .................................................................... 1

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Battery Voltage Check ........................................................ 1

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AC Voltage Measurement .................................................. 1

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Earth Voltage Measurement ............................................... 1

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4-wires Precise Earth Resistance Measurement ................. 1

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3-Wires Earth Resistance Measurement ............................. 1

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2-Wires Simple Measurement ............................................ 1

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Soil Resistivity Measurement ............................................

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Backlight Control ..............................................................

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Alarm Settings .................................................................

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Data Lock/Storage ............................................................

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Data Reading/Deletion .....................................................

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Data Upload .....................................................................

VII..

attery Replacement .............................................................

VIII

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Accessories ............................................................................

Summary of Contents for EZ Res Pro

Page 2: ...rinciple 10 VI Operation Methods 11 1 Switch On Off 11 2 Battery Voltage Check 11 3 AC Voltage Measurement 11 4 Earth Voltage Measurement 12 5 4 wires Precise Earth Resistance Measurement 13 6 3 Wires Earth Resistance Measurement 15 7 2 Wires Simple Measurement 15 8 Soil Resistivity Measurement 17 9 Backlight Control 18 10 Alarm Settings 18 11 Data Lock Storage 18 12 Data Reading Deletion 19 13 Da...

Page 3: ...tion to warnings and symbols shown on the device Make sure that device and accessories are in good working order before use Do not use if there are broken parts or exposed areas of test wires Do not touch probes while measurement is in progress risk of electrical shock During measurement do not touch bare conductors or circuits under measurement Before measurement please set rotary FUNCTION switch...

Page 4: ... switch is in OFF position Dispose of used batteries in an appropriate manner When the meter displays battery low voltage symbol replace batteries The Tester has no auto shut off function Uof Testing complete turn rotary FUNCTION switch to Off If the Tester is not going to be used for a long period remove batteries to prevent battery corrosion and damage to the device This measuring device is only...

Page 5: ...ocate desired subterranean anomalies The EZ Res Pro is also widely used in commercial power telecommunications oil field applications and general construction The Terra EZ Res Pro is composed of a host device monitoring software testing wires communication wires probes and a carrying case The large LCD display of device offers blue back light for dark conditions and a digital bar graph for ease of...

Page 6: ...1 5V continuous standby for 300 hours Measurement Range Earth Resistance 0 00Ω 30 00kΩ Soil Resistivity 0 00Ωm 9000kΩm Measuring Modes Precise 4 probe measurement 3 probe measurement and simple 2 probe measurement Measuring Methods Earth Resistance rated current change pole method measurement current 20mA Max Soil Resistivity 4 pole measurement Wenner or Schlumberger Arrays Earth Voltage average r...

Page 7: ...ld be at least 30 seconds Circuit Voltage Below AC 600V RS232 Interface RS232 interface software supervision storage data can be uploaded to computer saved or printed Communication Wire One RS 232 Cable Data Storage 300 measurements MEM icon storage indicator flash display FULL icon to indicate storage is full Data Hold Data hold function HOLD icon display Data Read Data read function READ icon di...

Page 8: ...tion Resistance Over 20MΩ between circuit and enclosure it is 500V Withstanding Voltage AC 3700V rms Between circuit and enclosure Electromagnetic Features IEC61326 EMC Protection Type IEC61010 1 CAT Ⅲ 300V CAT IV 150V Pollution 2 IEC61010 031 IEC61557 1 Earth resistance IEC61557 5 Soil resistivity JJG 366 2004 3 Intrinsic error and performance indicators under base conditions Category Measurement...

Page 9: ...m 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 7 ...

Page 10: ...n 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 Standard test wires 11 Auxiliary earthing probes 12 Simple test wires IV LCD Display 8 ...

Page 11: ...ata access symbol Press MEM for at least 3 seconds to access data 7 Data storage symbol Press MEM to store data 8 Interference signal symbol Displays when interference voltage exceeds 5V 9 Low battery symbol Displays when battery voltage falls to 7 5V or less 10 Displays the group number of stored data and countdown 11 Interference electrode symbol Displays when interference exceeds 5v 12 Measured...

Page 12: ...thod clip ES and E to the same probe during testing The 4 wires method can eliminate the influence of contact resistance usually caused by dirty probes between measured earthing body auxiliary earthing probes test clips and or meter s input interface The 4 wires method can also eliminate influence of line resistance 3 Maximum Operating Error Operating error B is an error obtained within the rated ...

Page 13: ...e calculation make electrode distance a much more than probe embedding depth h generally a 20h as shown below VI Operation Methods 1 Switch On Off Rotate FUNCTION rotary switch to switch on and off The rotary switch button is in position OFF for shut off The Tester has no auto shut off function shut it off after usage to prevent unwanted battery drainage 2 Battery Voltage Check After switch on if ...

Page 14: ...ng LCD will display the test results 4 Earth Voltage Measurement Earth voltage measurement uses only 2 probes ES P The meter connects with the earth by using only testing wires and 2 probes Other testing wires of meter s interface cannot be used to connect with commercial power line L N as breakers may be tripped and serious damage to tester will result Earth voltage measurement cannot exceed 600 ...

Page 15: ...ce usually caused by rust between probes test clips and or meter s input interface The 4 wires method can also eliminate influence of line resistance It is much better than 3 wires measurement As shown below Start from probe E interval 10 30 respectively insert P S C H probes deep into the earth in a straight line and then connect testing wires black green yellow red from E ES P S C H interfaces c...

Page 16: ...ntact resistance between meter and testing wires or between testing wires and probes Oxidation layers on probes must be removed when measuring 7 2 Wires Simple Measurement Using simple 2 wires method for measuring earth resistance choose a earthing body which has a small re value as auxiliary earthing probe so that the reading value is more close to the actual value Buried metal pipes or metal fir...

Page 17: ...ydrants and other metal buried objects common earthing of commercial electric power system or lightning protection earth ground electrode and others to replace auxiliary earthing rods C H P S remove oxide layer on the connection point of the selected metal auxiliary earthing object when making measurement Wire connection is as shown in following figure and refer to 4 wires measurement for other op...

Page 18: ...t and so on the soil resistivity will correspondingly show a significant change Soil resistivity is measured by 4 pole method ex Wenner method According to formula ρ 2πaR Ωm calculating soil resistivityρ its unit is Ωm in which a probe separation distance R soil resistivity between electrode P S ES 4 pole method Wenner method Connect testing wires as shown below pay attention to the distance betwe...

Page 19: ...press Light button to turn backlight on or off The backlight function is helpful in dark situations power consumption of backlight is about 25mA It will default to backlight turned off after each startup 10 Alarm Settings After startup rotate FUNCTION rotary switch to select function press button for a brief time to open or shut off alarm function hold for about 3 seconds to enter alarm critical v...

Page 20: ...ained above and easily transferred to an optional Interpolated Data Transfer Spreadsheet supplied by Terra Exploration Group The Interpolated Data Transfer Spreadsheet feeds seamlessly into the optional 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 Spr...

Page 21: ...g 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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