MEWOI3800E non-contact grounding resistance online tester

Equipped with RS485 (support MODBUS-RTU communication protocol) optional GPRS communication

  • Main Features:: MEWOI3800E non-contact grounding resistance online tester
  • Model No.:: MEWOI3800E
  • Name:: MEWOI3800E non-contact grounding resistance online tester
Contact Us For QuotationEmail:  464560351@qq.comWhatsapp&Wechat:+8618620373879

Product nickname

Loop grounding resistance online monitoring, metal loop connection resistance online monitoring, grounding status monitoring; grounding wire, metal cable anti-theft monitoring.

Product Introduction

MEWOI3800 non-contact grounding resistance online tester is specially designed and manufactured for online monitoring of the connection status of grounding down conductors, loop grounding resistance, and metal loop connection resistance. On-line test, non-contact measurement, grounding wire through the heart, no need for self-test, real-time detection. Provide RS485 (support MODBUS-RTU communication protocol). The detector is composed of sensors and circuit board modules, which is suitable for secondary development and integration by users. It is suitable for grounding of transmission line towers; underground mine equipment grounding; meteorological lightning protection grounding; petrochemical grounding; communication grounding; substation grounding; railway facilities grounding; building warehouse grounding; It can also be used for anti-theft monitoring of grounding wires and metal cables.

      MEWOI3800E is a small-diameter sensor with small size and light weight, suitable for installation in places with limited space. It can be installed and used individually, or it can be used as a wired network system or a wireless network system.

MAIN FEATURES

POWER indicator light

Working power indicator, it will be displayed when the power is turned on

ALARM indicator

Alarm indicator light, flashes when the tested value is greater than the set critical value

SET key

enter settings

up and down arrow keys

After pressing the SET key to enter the alarm setting, press the up and down arrow keys to change the size of the number

ENTER key

After the alarm threshold is set, press ENTER to save

Product Number

modelCT structureRangeDifference description
MEWOI3800Bclosed loop0.010Ω~200ΩThe detector has no display screen and indicator light, and needs to be set up to use the network
MEWOI3800Cclosed loop0.010Ω~200ΩThe detector has its own display screen, alarm setting, sound and light alarm indication
MEWOI3800LCOpen and close0.010Ω~100ΩThere is no need to disconnect the ground wire for installation. The detector has sound and light alarm indication
MEWOI3800LDOpen and close0.010Ω~100ΩThere is no need to disconnect the ground wire for installation. The detector has display screen, alarm setting, sound and light alarm indication
MEWOI3800EClosed-loop built-in0.010Ω~100ΩSmall caliber, no housing, suitable for secondary development
MEWOI3800NClosed-loop built-in0.010Ω~100ΩFlat diameter, no shell, suitable for secondary development
MEWOI3800TClosed loop external0.010Ω~100Ω304 stainless steel shell, suitable for secondary development, explosion-proof and anti-collision, waterproof and dustproof, high and low temperature resistance
MEWOI3800XOpen and close0.010Ω~10ΩLarge diameter, no need to disconnect the ground wire for installation, no casing, suitable for secondary development
MEWOI3900none0.01Ω~2000ΩNeed grounding auxiliary pile, communicate directly with computer, have display screen, alarm setting, sound and light alarm indication
MEWOI3900Bnone0.01Ω~2000ΩNeed grounding auxiliary pile, communicate directly with computer, have display screen, alarm setting, sound and ligh

Technical parameter

Function

Loop grounding resistance online monitoring, metal loop connection resistance online monitoring, grounding status monitoring; grounding wire, metal cable anti-theft monitoring

power supply

6VDC~12VDC, 50mA Max. (external power supply)

Resistance range

0.01Ω~100Ω

Resolution

0.001Ω

Accuracy

±2%rdg±3dgt (20℃±5℃, below 70%RH)

LCD size

47mm×28.5mm

PCB size

75mm×54mm×22mm

sensor size

76mm×60mm×38mm

Sensor caliber

Φ17mm

sensor quality

About 188g; total mass: about 334g (including accessories)

overflow indication

When the displayed value is greater than 100Ω, the communication sends the "OLΩ" command

communication method

RS485 (support MODBUS-RTU communication protocol), optional GPRS communication

PCB interface

J1: signal output, power input interface

J2: Sensor and PCB connection port

J1 logo

P+: power input positive

P-: power input ground

GND: signal ground, short circuit with power input ground (P-)

R+: signal output positive

R-: signal output negative

J2 logo

I+, I- current coil interface

U+, U- voltage coil interface

GND: common ground

cable

1 piece, 0.5m long (5 cores)

signal line

1 piece, 1 meter long (5 cores)

Connecting line identification

Red --- power input is positive;

Black --- power input ground; (power input ground and shield ground can be short-circuited)

Green --- RS485 signal is positive;

Yellow-green --- RS485 signal negative;

White --- shielding ground;

Working temperature and humidity

-20℃~55℃;20%RH~90%RH

shift gear

fully automatic shift

Ground interference current

should be avoided

external magnetic field

<40A/m

external electric field

<1V/m

single measurement time

about 0.5 seconds

Working current

50mA Max.

Install

The ground wire passes through the center hole of the sensor

installation requirements

The circuit board needs to be placed in another protective box


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