Chinese Supplier Digital Earth Resistance Tester

• After-sales Service: 1 Year
• Warranty: 1 Year
• Ground Resistance Range: :0.00Ω~3000Ω
• Ground Voltage: 1-600V
• Accuracy: 1% ± 3 Words
• Load Way: Electronic Load
• Model NO.: HDJD-470
• Max. Resolution: 0.01Ω; 1V
• Function: Grounding Resistance Voltage Test
• Transport Package: Wooden Box
• Trademark: HD Power
• Origin: Made in China
• HS Code: 9030809090

Product Description

General Information 

HDJD-470 Earth resistance tester is specially designed and manufactured for ground resistance, The testing current reaches 20mA. The digital and micro-processing technology, precision 3-wire method and simple 2-wire method are used to measure ground resistance, importing FFT (Fast Fourier Transform) technology, which is widely used in electric power, telecommunications, meteorology, oil field, construction, lightning protection, industrial electrical equipment and other earth resistance, earth voltage measurement.

Technical parameter
 

Function	Grounding resistance, low resistance test, grounding voltage test.
Power	DC 7.4V 1.8Ah rechargeable Li-battery, battery full charge time 8h.
Back light	Controllable white screen backlight, suitable for use in dark field.
Testing method	Precision three wire method and simple two wire method to test grounding resistance
Measure method	Earth Resistance: rated current change-pole method,
	Earth Voltage: average rectification(between P(S)-ES)
Range	23 wire method for measuring ground resistance (R):0.00Ω~3000Ω
	Grounding voltage:AC 1~600.0V(50Hz/60Hz)
Max. resolution	0.01Ω; 1V
Accuracy	Grounding Resistance: +2% rdg+5dgt Note: 1. Auxiliary Grounding Resistance 100_+5%, Ground Voltage < 5V  2. Additional error (<5%rdg+5dgt) at 5V interference voltage
	Grounding voltage: ±2%rdg±3dgt
Short circuit test current	AC 20mA max
Open circuit test voltage	AC 40V max
LCD	6" LCD display, white screen backlight
LCD size	128mm×75mm
LCD display size	124mm×67mm
Testing indication	LED flashing indication in measurement.LCD count down.Progress bar chart indication
Size	Host machine:Length Width Height 320mm×275mm×145mm
	Outer size:Length Width Height 400mm×245mm×335mm
Standard test wire	Total 3pcs:red wire 20m,yellow wire 10m,green wire 5m, each 1pcs
Simple test wire	Total 2pcs:red wire 1.6m,black wire 1.6m each 1pcs
Auxiliary grounding rod	2 pcs:φ10mm×150mm
Test time	Ground voltage: approx 2times/sec; ground resistance:approx 7times/sec;
Test times	5000times above ( short circuit test, test 1 time,Stop for 30 seconds and retest. )
Circuit voltage	AC 600V
Communication port	With RS232 interface, storage data can be uploaded to the computer and saved to print.
communication wire	RS232 communication wire 1pcs, length 1.5m
Data save	100 SET,"MEM"Storage instructions,display "FULL"Indicates that the storage is full.
Data read	the "READ" symbol indicates look up data
Interface test	Recognize interference signal automatically, "NOISE" icon display when interference voltage exceed 5V
Alarm function	When measuring value exceeds alarm setting value, there is "Toot-toot-toot" alarm hint
Battery voltage	When low battery, battery voltage low icon will display, reminding to charging battery.
Working current	Standby: about 25mA (Backlight shut off); backlight:25mA Max(only backlight consumption); Measurement: about 150mA (Backlight shut off)
Weight	Host machine:2.645kg(with battery)
	Total weight:5.95kg(with package)
Overload protection	Measure ground resistance :C(H)-E,P(S)-ES between each port AC 280V/3sec
Insulation resistance	20MΩ above(between circuit and shell 500V)
Withstand voltage	AC 3700V/rms(between circuit and shell)
Comply standard	IEC61010-1(CAT 300V,CAT IV 150V,pollution class2); IEC61010-031;IEC61557-1(ground resistance); IEC61557-5(soil resistivity);JJG 366-2004(ground resistance meter).