300K Ohm Earth Resistance Tester with Double Clamp

Features:
1.The two-, three- and four-wire,selection method, and double clamp method to measure earth resistance
2.The uniquely designed socket indicator light accurately indicate the position of the socket to avoid operating error.
3.The 12 gear function selection knob,various testing methods are shown in detail, making operation simple and fast.
4.The tester adopt FFT (fast Fourier transform) technology and AFC (automatic frequency control) technology. It has unique anti-interference ability and environmental adaptability, and has strong consistency in repeated tests.
5.The host has max LCD display, white screen backlight, and bar chart indication, which is clear.
6.Alarm function, the alarm threshold can be set.
7.Memory, 200 sets of data storage.
8.USB interface, data upload function.
9.Bluetooth Communication

Specifications

Measurement Function	Measuring Range	Accuracy	Resolution
Two-Three-Four-wire Method To Measure Earth Resistance (R~) & DC Resistance (R—)	0.000Ω~9.999Ω	±2%rdg±0.05Ω	0.001Ω
	10.00Ω~29.99Ω	±2%rdg±5dgt	0.01Ω
	30.0Ω~299.9Ω	±2%rdg±3dgt	0.1Ω
	300Ω~2999Ω	±2%rdg±3dgt	1Ω
	3.00kΩ~300.00kΩ	±4%rdg±3dgt	10Ω
Selection Method To Measure Earth Resistance (R~)	0.000Ω~9.999Ω	±2%rdg±0.05Ω	0.001Ω
	10.00Ω~29.99Ω	±2%rdg±5dgt	0.01Ω
	30.0Ω~299.9Ω	±2%rdg±3dgt	0.1Ω
	300Ω~3000Ω	±2%rdg±3dgt	1Ω
Double Clamp Method To Measure Earth Resistance (R~)	0.01Ω~0.99Ω	±10%rdg±5dgt	0.01Ω
	1.0Ω~29.9Ω		0.1Ω
	30Ω~100Ω		1Ω
Soil Resistivity(ρ)	0.00Ωm~99.99Ωm	Depending on the measurement accuracy of R (ρ=2πaR a:1 m~100m; π=3.14)	0.01Ωm
	100.0Ωm~999.9Ωm		0.1Ωm
	1000Ωm~9999Ωm		1Ωm
	10.00kΩm~99.99kΩm		10Ωm
	100.0kΩm~999.9kΩm		100Ωm
	1000kΩm~9000kΩm		1kΩm
Earth Voltage (V~) 50Hz/60Hz	AC 0.0V~100.0V	±2%rdg±3dgt	0.1V
Earth Current (A~) 50Hz/60Hz	AC 0.00mA~600.0A	±2%rdg±3dgt	0.01mA

2.General Specification

Power Supply	DC 7.4V 2600mAh rechargeable lithium battery, the battery is fully charged about 8.4V
Display Mode	4-digit max LCD display, white screen backlight
Measurement Instruction	LED flashing indication during measurement, LCD countdown display
LCD Size	128mm×75mm;LCD Display area: 124mm×67mm
Backlight	Controllable white screen backlight, suitable for use in dim place
Measurement Method	DC Resistance	DC resistance bipolar method
		DC resistance quadrupole method
	Earth Resistance	Earth resistance bipolar method
		Earth Resistance Three-electrode method
		Earth resistance Quadrupole method
		Earth resistance single clamp Three-electrode method (selection method)
		Earth resistance single clamp quadrupole method (selection method)
		Earth resistance double clamp method
		Soil resistivity (Wenner method)
	Earth Current	Current clamp measurement
	Earth Voltage	Average value rectification
Test Frequency	128Hz/111Hz/105Hz/94Hz(AFC)
Short Circuit Test Current	AC 250mA max
Open Circuit Test Voltage	AC 40V max
Electrode Spacing Range	1m~100m
Test Line	4 PCS: red 20m, black 20m, yellow 10m, green 10m each 1 piece
Simple Test Line	2 PCS: red 1.6m, black 1.6m each 1 piece
Auxiliary Earth Rod	4 PCS:φ9mm×230mm (about 696g)
Current Clamp	2 PCS:blue and black plug, 1 red and black plug each
Current Clamp Caliber	φ70mm
Current Clamp Size	223mm×120mm×39mm
Measurement Time	AC current: about 2 times/second; earth voltage: about 2 times/second; earth resistance: about 7 seconds/time
Line Voltage	Measurement below AC 600V
Communication Method	Bluetooth module, USB interface, storage data can be uploaded to the computer through software
Data Hold	When Data holding : “HOLD" symbol display
Memory	2000 groups, flashing "FULL”symbol indicates that the storage is full
Data Access	Data access function: “READ" symbol display
Overflow Display	Over-range overflow function: “OL" symbol display
Interference Test	Automatically identify the interference signal, and the “NOISE” symbol indicates when the interference voltage is higher than 5V
Auxiliary Earth Test	With auxiliary earth resistance value test function,0.00KΩ~30kΩ(100R+rC<50kΩ,100R+rP<50kΩ)
Alarm Function	When the measured value exceed the alarm set value,“Du-Du-Du-" Alarm prompt
Alarm Threshold Setting Range	Resistance: 0Ω~9999Ω, voltage: 0.0V~100.0V, current: 0.000A~9.9999A
Automatic Shutdown	Automatically shut down after 15 minutes of power on
Working Current	Backlight: 25mA Max (separate backlight power consumption); standby: 25mA Max (the backlight is turned off after the tester turning on); measurement: 150mA Max (the backlight turn off)
Tester Size	280mm×260mm×160mm
Weight	Tester: About 1799g(include battery);total weight: about 6.13kg(include accessory)
Battery Voltage	When the battery voltage drop to about DC 7.2V±0.1V, the low battery voltage symbol is displayed to remind that the battery need to be replaced.
Protection Level	IP65(closed)
Overload Protection	Measuring earth resistance: AC 280V/3 seconds between C(H)-E、P(S)-ES ports
Insulation Resistance	Above 20MΩ(500V between the circuit and the housing)
Withstand Voltage	AC 3700V/rms(Between the circuit and the housing)
Electromagnetic characteristics	IEC61326(EMC)
Suitable Safety Regulation	IEC61010-1(CAT Ⅲ 300V, CAT IV 150V, pollution level 2);IEC61010-031; IEC61557-1(Earth resistance);IEC61557-5(Soil resistivity);JJG 366-2004(Earth Resistance Tester);JJG 1054-2009(Clamp Earth Resistance Tester)
Working Temperature & Humidity	-10℃~40℃; below 80%RH
Storage Temperature & Humidity	-20℃~60℃; below 70%RH