FUZRR ES3001 User manual

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CONTENT
ISafetyPrecautions and Procedures 2
II Introduction 3
III. Rang and Accuracy 3
IV Technical Specifications 4
VStructure 6
VI MeasuringPrinciple 7
VII Operation 8
1Switch on/off 8
2. Battery Voltage Check 9
3. Ground voltage measurement 9
4Wireresistance check 9
5Four-wire Precision Test Grounding Resistance 10
6Three-wireTest GroundingResistance 13
7Two-wire Easy Test Grounding Resistance 13
8Soil Resistivity Test 14
9Backlight Control 16
10 Alarm Setting 16
11 Data Lock/Storage 16
12 Data Review/Delection 17
13 Data Upload 17
VIII. Battery Instructions 18
IX Accessories 18

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ISafetyPrecautionsandProcedures
Thankyoufor purchasing ourcompany's Soil Resistivity Tester.Before
usingthe instrumentfor the first time,in order to avoidpossibleelectric
shock orpersonalinjury,pleasebesureto read andstrictly observethe
safety rulesand precautions listed in this manual.
Inanycase,theuseofthis instrument should pay special attentionto
safety.
lTheinstrumentisdesigned,producedandinspectedaccordingtoIEC61010
safety specifications.
lInanycase, the use ofthis instrumentshouldpayspecial attention to
safety.
lWhenmeasuring,high-frequencysignalgeneratorssuch as mobilephones
should notbeusednext to themeter to avoid errors.
lPay attentiontothe text and symbols on thebody ofthe instrument.
lBefore use,make sure thatthe instrument andaccessories are in good
condition.Theinsulation layerof the instrumentand test wireisnot
damaged, exposedor broken.
lDuring the measurement, itis forbiddento touchexposedconductors and
the circuit beingmeasured.
lMake suretheconnection plug of thewire is tightly inserted in the meter
connector.
lDonot apply morethan100VACvoltageorDCvoltagebetween thetest
terminal and theinterface,doingso may damagethemeter.
lDo not measure inflammableplaces,sparks may causeexplosion.
lWhen the instrument is in use and the enclosure or test wire is broken
and themetalisexposed, please stop using it.
lDonot place andstorethe instrument foralongperiodoftime under
conditionsof hightemperature,humidity,condensation,anddirect
sunlight.
lWhen charging the battery,make sure thetest line has beenremoved from
the meter andthemeter is off.
lThemeterdisplaysthebatteryvoltagelowsymbol “”andshouldbe
chargedintime.
lPayattentionto themeasuringrangeanduseenvironmentspecifiedbythis
instrument.
lThe use,disassembly, calibration andmaintenance of this instrumentmust
be performed by authorized personnel.
lBecause of the reason ofthis instrument,ifit is dangerous tocontinue
using it,it should beimmediately stoppedand sealed immediately,and

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it should be handled by a qualifiedorganization.
lThe""safetywarningsign intheinstrumentand manualmust beoperated
strictly in accordance withthe contents of this manual.
II Introduction
SoilResistivityTester alsoKnown as GroundResistance •Soil
Resistivity Tester, Precision Ground ResistanceTester, etc., is acommonly
used meter formeasuringgrounding resistance. It adopts alargeLCD
gray-whitescreen backlightdisplayand microprocessortechnologyto meet
the requirementsoftwo-wire、three-wire andfour-wire testresistance and
soilresistivity. Suitablefortelecommunications, electricity, meteorology,
computerrooms,oil fields, power distributionlines, iron tower
transmissionlines, gas stations, factory grounding networks,lightningrods
and so on. Instrument testing is precise, fast, simple,stable and reliable.
The Soil Resistivity Tester is controlledby themicroprocessorandcan
automatically detect the connectionstatusofeachinterfaceandthe
interference voltage and interference frequency of the ground network,and
has the function of testingthe auxiliarygroundingresistancevalue.At the
same timestore500sets ofdata, resistancemeasurementrange: 0.01Ω~
30.00kΩ,grounding voltagerange:0.01~100.0V. Onlinemonitoring data
throughmonitoringsoftware, USBdatauploaded toPCanduniquefeaturessuch
as intelligent alarm alert
The SoilResistivity Tester consistsofhost,monitoringsoftware,test
line,USBcable,andgroundingrod.Ithasthefunctionsof reading,checking,
saving,reportingandprintingofhistoricaldata.
III.Rang and Accuracy
Test
Function Range Accuracy Resolution
Grounding
Resistance
(R)
0.00 ～30.00 ±2%rdg±5dgt
(remark1) 0.01
30.0 ～300.0 ±2%rdg±3dgt 0.1
300 ～3000 ±2%rdg±3dgt 1
3.00k ～30.00k ±2%rdg±3dgt 10
Soil
Resistivity
(ρ)
0.00 m～99.99 m
ρ=2πaR (remark2)
0.01 m
100.0 m～999.9 m 0.1 m
1000 m～9999 m 1 m
10.00k m～99.99k
m 10 m
100.0k m～999.9k
m 100 m
1000k m～9999k m 1k m

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Grounding
Voltage AC 0.00～100.0V ±2%rdg±3dgt 0.01V
Remark：
1. Reference conditions:accuracywithRhRs< 100Ω。
Workingconditions:Rhmax＝3kΩ+100R＜50kΩ；Rsmax＝3kΩ+100R＜50kΩ
2.Depends on themeasurement accuracy of R,π=3.14,a:1m～100m；
IV TechnicalSpecifications
Function Two three four-
wiremeasure groundingresistance, soil
resistivity;
Ground voltage, ACvoltage measurement
Ambient
temperature and
humidity
23℃±5℃，below75%rh
Power DC6V4.5Ah lead-
acid batterylasts more than100 hours
standby
Interference
voltage <20V(should be avoided)
Interference
current <2A (should be avoided)
MeasureR
electrode
spacing
a＞5d
Measured
electrode
spacing
a＞20h
Auxiliary ground
resistance Reference condition <100Ω,workingcondition <5kΩ
Range Grounding resistance:0.00Ω～30.00kΩ Soilresistivity:0.00Ωm～9999kΩm
Grounding voltage:0.00V～100.0V
measurement mode
Precise four-wire、three-
wire measurement, simple
two-wire measurement
Measurement
methods
Grounding resistance: rated currentchange polemethod
Soilresistivity:four-polemethod
GroundVoltage:AverageRectification(betweenS-
ES
interface)
Test frequency 128Hz
Short circuit
test current >20mA (Sine Wave)

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Open circuittest
voltage AC 28V max
Electrode
spacingrange Can be set1m ～100m
Change gear fully automatic shifting0.00Ω～30.00kΩ
fully automatic shifting0.00 Ωm～9000kΩm
Backlight
Controllablegray screenbacklight,suitableforuse
in dim places
Displaymode 4-bit large LCD display,gray screen backlight
Measurement
instructions LED flashing indicator during measurement
LCD size 111mm×68mm
LCD displayfield 108mm×65mm
Instrument size L/W/H：277.2mm×227.5mm×153mm
Standard test
line length 4strips：red 15m，black15m, yellow10m，
green 10m each
one
Simple test line 2strips：yellow 1.6m，green1.6m each one
Auxiliary
Grounding rod 4PCS：φ10mm×200mm
Measuretime Ground voltage：about3 times/sec;
grounding resistance 、
soilresistivity:about7
seconds/time
Line voltage Measurementbelow AC100V (ground volt
agemeasurement
functioncannotbe usedto measure commercial power)
USB interface
With USB interface, software monitoring, storagedata
can be uploaded tothe computer, save andprint
Communication
Line One USBcommunicationline,1.5m long
Data storage
500groups,"MEM" storageindicates,flashing"FULL"
symbol indicatesthatthe memory isfull
Data review Datareview function:"MR" symboldisplay
Overflow display Over-rangeoverflow function: "OL"symboldisplay
Interference
test
Automatic identif
ication of interference signals,
"NOISE"symbolindicationwhen theinterference
voltageishigherthan 5V
Auxiliary
grounding test
With auxiliary ground resistance test function, 0.00K
Ω~ 30kΩ(Rhmax=3kΩ+100R<50kΩ;Rsmax=3k
Ω+100R <50kΩ)
Alarm function
Alarmwhen the measured value exceeds the alarmsetting
value
Batteryvoltage Real-
timedisplay ofbatterypower,remindingtimely

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charging whenbatteryvoltage is low
Automatic
Shutdown “APO”Indicates,automaticShutdownAfter15Minutes
Power
consumption
Standby: 40mAMax(Backlightoff)
Turnonbacklight:about43mA
measuring：75mA Max(Backlight off)
Weight Instrument：2450(includingbattery) Testlines：1300g
Auxiliary grounding rod：850g(4PCS)
Working
temperature and
humidity -10℃～40℃；below80%rh
Storage
temperature and
humidity -20℃～60℃；below70%rh
Overload
protection Grounding resistance：AC 280V/3 secondsbetween H-
Eand
S-ESports
Insulation
resistance 20MΩ以上(500V between circuitandhousing)
Pressure
resistance AC 3700V/rms(between circuit and housing)
Electromagnetic
properties IEC61326(EMC)
Suitable for
safety
regulations
IEC61010-1(CAT Ⅲ300V、CAT IV 150V、pollutionlevel
2)；
IEC61010-031；
IEC61557-1(grounding resistance)；
IEC61557-5(soil resistivity)；
JJG 366-2004.
V. Structure

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1. LCD2. H interface：current pole
3. S interface：voltage pole 4. E interface：
groundingpole
5.E interface: grounding electrode6. Functionbutton
7. DC charging 8. USBinterface 9. Testbutton
10. SafetyAlligator Clip11.Test line12. Groundingrob
13. Easy test line14.Simpletest line short connector
VI Measuring Principle
1．Groundvoltage measurement usingaverage rectification。
2．Thegroundingresistance value ismeasured usingtherated currentchange
method, thatis,the ACrated current Iflows betweenthegroundelectrode
ofthemeasuringobjectEand theHcurrent electrode to obtain the potential
differenceVbetweenthe Egroundelectrodeandthe Svoltageelectrode, and
calculate the groundingresistance Raccording to theformulaR=V/I.In order
toensuretheaccuracy of the test,afour-wire method was designedto increase
the ES auxiliary ground. During the actual test, ES and E were clamped at
thesamepoint of the grounding body.Thefour-wiretestcaneliminatethe
influenceofthecontactresistance(usuallydirtorrust)onthemeasured
grounding body,auxiliarygrounding rod,test clip, and the inputinterface
ofthe instrumenttothe measurement,andcaneliminatetheinfluence ofthe
wireresistance onthe measurement,more precise.

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3．Theworkingerror(B)istheerrorwithintherated operating conditions,
whichis calculatedfrom the inherenterror (A)andvariationerror (Ei)of
the existing instrument.。
A：inherent error
E2：Changes due topowersupply voltage changes
E3：Changes due totemperaturechanges
E4：Changes due todisturbancevoltagevariations
E5：Changes due tocontact electrode resistance
4．Soilresistivity(ρ)ismeasuredusingthe4-polemethod(Winner
method):ACcurrent IbetweengroundelectrodeEand currentelectrode
H,calculate thepotentialdifference Vbetween the voltage pole S and the
auxiliary groundpoleES,the potential difference Vis dividedby the
alternatingcurrent Itoobtainthe ground resistance value R,theelectrode
spacingdistanceis a(m)，accordingtothe formula ρ=2πaR(Ωm),thesoil
resistivityvalueisobtained, whenthe distance between H-S and S-ES is equal
(both a), itis the Wenner method. Forease of calculation,pleasemake the
electrodespacing amuch largerthan theburieddepth h,generallyshould
meet a> 20h,seethe figurebelow.
VII Operation
1．Switch on/off
PressthePOWER button to switch onandoff. Afterturning onthemachine,
the lowercorner shows"APO"andit willautomatically shutdown after15
minuteswhen it isnot operating.
2Battery Voltage Check

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Afterpoweringon,ifthe LCD shows alowbattery voltagesymbol “”,
itindicatesthatthebatteryisrunninglow.Pleasechargeitintime.The
batterypowerissufficienttoensuretheaccuracyof themeasurement.When
the battery powerdecreases, the powerindicator bardecreases.
3GroundVoltageMeasurement
One auxiliarygrounding rod isrequired forthe ground
voltagetest.
As long as the instrumentis connected to theground
through the tes
twire and the auxiliary groundingrod,the
other test wires of the instrument interface cannot be
connected to the Land Nwires ofthe commercial power
supply. Otherwise,the leakage mayoccur, and the circuit
breakermay start up andbe dangerous.
Ground voltage test cannot exceed 100V。
Grounding voltage: whenthe ground faultoftheelectrical equipment
occurs,thepotentialdifferencebetweenthegroundingdevicecasing,the
grounding wire, the grounding bodyand the zeropotential point,the
groundingvoltageistheearth'sreferencepoint,potentialdifferencewith
the earth,the earth is zero potentialpoint.
Anauxiliarygroundingrodisrequiredfor theground voltagetest.Note
the differencefrom thecommercial AC voltagetest.See thefollowingfigure:
Afterthe meter,auxiliary groundingrod andtest line areallconnected,
afterpoweron,pressfunctionbuttonU,andthe LCDshowsthetestresult.
4Wire resistance check
Inorder toimprove the precision and stability ofthegrounding
resistancemeasuredinthefield,theerrorcausedby thechangeof the wire
resistance due to the test line being used for a long time is avoided; To
avoidtheerrorcausedbythetestlinenotcompletelyinsertedinto the