Product Introduction

MOEORW‑W1352 is a professional non‑disconnection grounding resistance tester designed for transmission tower, self‑locking tower and substation. It adopts innovative four‑clamp wireless measurement technology, which can realize online measurement without power cut and wire disconnection. The instrument has high‑definition color screen, built‑in printer and Bluetooth communication, which is convenient for on‑site operation and data output. IP65 waterproof and shockproof structure ensures stable performance in harsh outdoor environment.

Product Parameter (specification)

1. Baseline conditions and operating conditions

Impact	Baseline conditions	Working conditions	Remark
Ambient temperature	23℃±1℃	-10℃～40℃	----
Ambient humidity	40%～60%	<80%	----
Instrument operating voltage	DC 7.8V±0.1V	DC 7.8V±0.6V	----
Auxiliary grounding resistance value	<100Ω	<10kΩ	----
Interference voltage	none	<20V	----
Interference current	none	<1A (50Hz)	----
Electrode spacing during R measurement	a＞5d	a＞5d	----
Electrode spacing when measuring ρ	a＞20h	a＞20h	----

2. General Specifications

Function	Four-clamp method for measuring tower grounding resistance; two-, three-, and four-wire method for measuring grounding resistance and soil resistivity; AC current; grounding voltage.
power supply	DC 7.4V , 5200mAh rechargeable lithium battery, fully charged to approximately 8.4V.
range	4-clamp method for measuring grounding resistance: 200Ω
	Grounding resistance: 0.00Ω～20.00kΩ
	Soil resistivity: 0.00Ωm ~ 9000kΩm
Measurement method	4-clamp method, precision 4-wire method, 3-wire method measurement, and simple 2-wire method measurement of grounding resistance, AC current, and grounding voltage.
Measurement methods	Tower grounding resistance: 4-clamp method Grounding resistance: Rated current polarity changing method, measured current 55mA Max Soil resistivity: Four-electrode method (Winner method) Alternating current: clamp CT, RMS acquisition Grounding voltage: voltage divider, RMS value acquisition
Current clamp diameter	Φ68mm
Test frequency	128Hz/111Hz/105Hz/94Hz (AFC)
Short-circuit test current	AC 55mA max
Open circuit test voltage	AC 15V max
Test voltage waveform	sine wave
Electrode spacing range	The setting can be from 1m to 100m.
Shift	4-clamp method for measuring grounding resistance: 200Ω fully automatic range switching
	Grounding resistance: 0.00Ω～20.00kΩ Fully automatic range shifting
	Soil resistivity: 0.00Ωm～9000kΩm Fully automatic gear shifting
	AC current (single CT): 1.00mA～500A fully automatic range shifting
	Grounding voltage: 0.0V～200.0V
Display mode	7-inch color screen
Measurement indication	LED flashing during measurement
LCD size	151mm×83mm
Instrument Dimensions	Height, Width, and Thickness: 355mm × 272mm × 164mm
Standard test line	4 strips: one 20m red strip, one 20m black strip, one 10m yellow strip, and one 10m green strip.
Simple test line	Two strips: one red 1.6m strip and one black 1.6m strip.
auxiliary grounding rod	4 pieces: φ 9 mm × 230 mm (approximately 935g)
Measurement time	Grounding resistance, soil resistivity: approximately 30 seconds/time
Number of measurements	More than 5000 short-circuit tests (test once, pause for 30 seconds, then test again).
Line voltage	Measurement below AC 600V
Communication interface	It features a USB interface, software monitoring, and data storage that can be uploaded to a computer, saved, and printed.
printer	Built-in
Data storage	Group 100, "001/100" storage indicator, displaying "100/100" indicates that storage is full.
Overflow display	The "OL" symbol indicates over-range overflow.
Auxiliary grounding test	It has an auxiliary grounding resistance value testing function, ranging from 0.00KΩ to 20kΩ (100R+rC<20kΩ, 100R+rP<20kΩ).
Alarm function	When the measured value exceeds the alarm setting value, Alarm symbol prompt
Automatic shutdown	Automatic shutdown 30 minutes after powering on.
Battery voltage	When the battery voltage drops to approximately DC 7.2V ± 0.1V, the low battery symbol " " will be displayed, reminding the instrument that it needs to be recharged.
Operating current	Standby: Approximately 400mA
Operating current	Measurement: Approximately 550mA
quality	Instrument: Approximately 2765 g (including battery)
	Current clamp: Approximately 500 g x 4 pieces
	Total weight: Approximately 9000 g (including accessories)
Operating temperature and humidity	-10℃～40℃; below 80% RH
Storage temperature and humidity	-20℃～60℃; below 70% RH
Overload protection	Measure grounding resistance: AC 280V/3 seconds between each port of C(H)-E and P(S)-ES.
Protection level	IP65 (with lid closed)
Insulation resistance	20MΩ or higher (500V between circuit and casing)
Pressure resistance	AC 3700V/rms (between circuit and casing)
Electromagnetic properties	IEC61326(EMC)
Suitable for safety regulations	IEC61010-1 (CAT III 300V, CAT IV 150V, pollution level 2); IEC61010-031; IEC61557-1 (grounding resistance); IEC61557-5 (soil resistivity); JJG 366-2004.

3. Basic errors and performance indicators under reference conditions

Measurement function	Measurement range	accuracy	Resolution
Grounding resistance ( R ) (4-clamp method)	0.10Ω～20.00Ω	±10%rdg±5dgt	0.01Ω
Grounding resistance ( R ) (4-clamp method)	20.0Ω～200.0Ω	±10%rdg±5dgt	0.1Ω
Grounding resistance ( R )	0.10Ω～20.00Ω	±2%rdg±3dgt	0.01Ω
	20.0Ω～200.0Ω	±2%rdg±3dgt	0.1Ω
	200Ω～2000Ω	±2%rdg±3dgt	1Ω
	2.00kΩ～20.00kΩ	±4%rdg±3dgt	10Ω
Soil resistivity ( ρ )	0.00Ωm～99.99Ωm	(ρ=2πaR a :1 m～100m; π=3.14)	0.01Ωm
	100.0Ωm～999.9Ωm		0.1Ωm
	1000Ωm～9999Ωm		1Ωm
	10.00kΩm～99.99kΩm	(ρ=2πaR a :1 m～100m; π=3.14)	10Ωm
	100.0 kΩm～999.9 kΩm		100Ωm
	1000kΩm～9000kΩm		1kΩm
Alternating current (A~)	1.00mA～50.00mA	±2%rdg±3dgt	0.01mA
	0.50A～5.000A	±2%rdg±3dgt	0.001A
	5.0A～500.0A	±3%rdg±3dgt	0.1A
Grounding voltage (V~)	0.0V ～ 200.0V	±2%rdg±3dgt	0.1V

Note 1. Additional error when rC max or rP max ≤ ±3%rdg±5dgt.

(rC max: 4kΩ+100R＜20kΩ; rP max: 4kΩ+100R＜20kΩ)

Additional error at 5V interference voltage ≤ ±5%rdg±5dgt.

Warning: Do not perform voltage measurements while the instrument is charging, connected to a computer, or powered externally.

Product features and applications

Exclusive 4‑clamp wireless measurement for tower grounding resistance
Support 2‑wire, 3‑wire, 4‑wire standard measurement and soil resistivity test
7‑inch color display, built‑in thermal printer for on‑site report printing
Bluetooth + USB communication, mobile APP remote control and data viewing
φ68mm large clamp, 5200mAh large capacity battery, long working time
IP65 protection grade, waterproof, dustproof and anti‑fall for outdoor use

Prodection details

Transmission line: tower, concrete pole, self‑locking tower non‑disconnection test
Power grid: substation grounding grid, distribution room precision grounding detection
Engineering survey: soil resistivity test for outdoor grounding system design
Outdoor engineering: high altitude, mountain, no power supply environment measurement
Emergency repair: power fault rush repair, lightning protection hidden danger detection
High‑voltage engineering: online monitoring of grounding voltage and leakage current