Gd3000 Digital Earth Resistance Tester

GD3000B Digital Ground Resistance Tester

Ⅰ. Introduction

GD3000 Digital Earth Resistance Tester is specially designed and manufactured for field measurement, adopting the latest digital and micro-processing technology, 3-pole or 2-pole method for earth resistance measurement, with a unique function of wire resistance verification, anti-interference capability and the ability ric power, telecommunications, meteorology, oil field, construction, lightning protection, industrial electrical equipment and other earth ground resistance measurement.

GD3000 Digital Earth Resistance Tester has a unique function of wire resistance verification,more accurate on measuring on-site low value earth ground resistance, which can avoid error caused by resistance change due to prolonged usage of testing wire; avto adapt to the environment, to ensure high precision, high stability and reliability for prolonged measure, which is widely used in electoid error caused by testing wire that is failed to be fully inserted into tester interface or by poor contact; avoid error caused by users’ replacing or lengthening testing wires.

GD3000 Digital Earth Resistance Tester is composed of host machine, monitoring software, testing wires, communication wires and others. The large LCD display of host machine is with blue backlight and bar graph indicating that can be seen clearly. At the same time it can store 400 sets of data, fulfilling historical inquiry and online real-time monitoring through monitoring software, dynamic display, with the maximum, minimum, and mean indicators, with alarm settings and alarm indicator, and with the functions like historical data access, reading, preservation, report forms, printing and so on.

Ⅱ. Technical Specifications

Model	ETCR3000
Function	Earth resistance measurement, Earth voltage measurement, Low resistance measurement
Power Supply	DC 9V (Zi-Mn dry battery R14S 1.5V 6 PCS, continuous standby for 300 hours )
Measuring Mode	Precise 3-pole measurement, simple 2-pole measurement
Measuring Method	Earth ground resistance: constant current change-pole method, measurement current 3mA Max,820Hz; Voltage to ground: average value rectification
Data Mode	Average value, maximum, minimum
Wire Resistance Verification	Avoid error caused by testing wire such as failed to be fully inserted into tester interface or by poor contact or by user’ s replacing or lengthening testing wires, making it more accurate for earth ground resistance measurement.
Display Mode	4-digital super-large LCD display, blue screen backlight, LCD dimension: 128mm×75mm;Display field:124mm×67mm
Measuring Indication	During measurement, LED flash indicator, LCD count down display
Earth Ground Resistance	Range:0.01Ω~2000Ω;Resolution:0.01Ω;Accuracy:±1%rdg±3dgt
Earth Ground Voltage	Range:0V~600V AC;Resolution:1V;Accuracy:±1%rdg±3dgt
Tester Dimension	LWH:215mm×190mm×95mm
Testing Wires	Three wires: each for Red 20m, Yellow 10m, and Green 5m
Simple Testing Wire	2 wires: each for Red 1.5m and Green 1.5m
Auxiliary Earthing Rod	2 PCS: Φ10mm×150mm
Measuring Rate	Earth voltage measurement: 3 times/second; Earth resistance: 5 seconds/time
Measuring Times	Over 5000 times (20Ω range measuring 10Ω for one time and repeat after 25 seconds)
Circuit Voltage	Measuring voltage to ground: measuring below AC 600V
RS232 Interface	Possess RS232 interface, software supervision, storage data can be uploaded to computer, preserved and printed.
Communication Wire	One piece of RS232 communication wire, with length 1.5m
Data Storage	400 sets, flash display “FULL”icon to indicate storage is full
Data Hold	Data hold function: “HOLD”icon display
Data Read	Data read function: “READ” icon display
Overflow Display	Exceeding measuring range overflow function: “OL”icon display
Alarm Function	When measuring value exceeds alarm setting value, there is “Toot-toot-toot” alarm hint
Battery Voltage	When battery voltage decreases to about 7.8V, battery voltage low icon “ ”will display, reminding to replace battery.
Power Consumption	Backlight:25mA Max;Standby: 25mA Max(Backlight shut off);Measurement:70mA Max(Backlight shut off)
Weight	1443g(with batteries)
WorkingTemperature & Humidity	-10℃~40℃;below 80%rh
Storage Temperature & Humidity	-20℃~60℃;below 70%rh
Overload Protection	Measuring earth ground resistance: between each interfaces of E-P,E-C, AC 280V/3 seconds
Insulation Resistance	Over 10MΩ(between circuit and enclosure it is 500V)
Withstanding Voltage	AC 3700V/rms (Between circuit and enclosure)
Electromagnetic Features	IEC61010-4-3,Wireless frequency electromagnetic field≤1V/m
Protection Type	IEC61010-1,IEC1010-2-31,IEC61557-1,5,IEC60529(IP54),CAT Ⅲ 300V ,Pollution etc.
Accessories	Tester: 1PC; Earthing Rod: 2PCS; Testing Wire: 3PCS; Simple testing wire: 2PCS; RS232 Com-cable: 1PC; Software disk: 1PC; Tester bag: 1PC