CN
    • Home / Product / Earth Resistance Online Detector / Grounding Pile Type Earth Online Detector / EM2900B Earth Resistance Online Detector

    EM2900B Earth Resistance Online Detector

  • Product Series : Grounding Pile Type Earth Online Detector

      • Main Features

      Online monitoring of the earth resistance, earth voltage.
      Earth Resistance Measurement Range: 0.01Ω ~ 2000Ω
      Earth Voltage Measurement Range: AC 0V ~ 600V
      Communication Mode: RS485 communication
      Alarm Function: Setting alarm threshold
      Setting Monitoring Interval

    Download

    Product Introduction

    EM2900B Earth Resistance Online Detector is also known as earth resistance remote online tester, contact type earth resistance online detector, which is used for remote online monitoring the earth resistance and earth voltage. The detector adopt with simple two-wire method or precision three-wire method to test earth resistance, and adopt the average value rectifier method to test the earth voltage and online real-time monitoring. The detector supports RS485 and 4G communication. Users can conduct secondary development and set up  network to realize remote multi-point online monitoring according to the provided MODBUS communication protocol. It is suitable for power facility grounding, highway equipment grounding, meteorological lightning protection grounding, communication base station grounding, railway facility grounding, construction warehouse grounding and electrical equipment grounding, etc.
    EM2900B Earth Resistance Online Detector equip with LCD displayer, which can view the earth resistance value on site, set the alarm threshold value through the detector button, set the monitoring interval time, and with audible and visible alarm indication.The detector equipped with DIN rail mounting structure, which is particularly convenient to installation.
    ETCRMETER is a high-end brand of ETCR. All products are manufactured by ETCR, which also provides technical support and after-sales service. 


    Product Features
    1. The detector adopt with simple two-wire method or precision three-wire method to test the earth resistance, and adopt average rectifier method to test the earth voltage.
    2. RS485 communication and 4G communication function
    3. Setting alarm threshold
    4. Setting monitoring interval time
    5. The detector equipped with DIN rail mounting structure, which is particularly convenient to installation.
    EM2900B (7).jpg EM2900B (6).jpg EM2900B (8).jpg

    Technical Parameters

    1.Measurement Range & Accuracy

    Measurement ModeMeasure RangeAccuracyResolution
    Earth Resistance0.01Ω～20Ω±2%rdg±3dgt (Auxiliary earth resistance: 100Ω ± 5%, earth voltage: < 10V)0.01Ω
    0.1Ω～200Ω0.1Ω
    1Ω～2000Ω1Ω
    Earth Voltage0～600V AC± 2%rdg ± 3dgt1V

    2.Technical Specification

    Specification NameParameters Description
    Power Supply

    Standard: 12V ~ 24V (±1V DC), 400mA Max. (external supply)

    Display Mode4 digit LCD display
    LCD Size47mm × 28.5mm
    Measure ModePrecise 3-wire measurement, simple 2-wire measurement
    Measure Method

    Earth resistance: Rated current change-pole method, measured current 11mA Max, 128Hz;

    Earth voltage: average value rectification method
    Earth Resistance Range0.01Ω～2000Ω
    Earth Voltage RangeAC 0V～600V
    Data ModeAverage
    Measurement IndicationLCD countdown indication during measurement
    Measurement Time

    Earth voltage: approx. 2 times/second;
    Earth resistance: approx. 30 second/time

    Measurement TimesAbove 10000 times
    Line VoltageMeasuring earth voltage: below AC 600V
    Detector InterfacePluggable terminal blocks: 9 pin terminal
    Communication ModeRS485; 4G
    ShiftAutomatically
    Data Storage99 groups , flash display” FULL” symbol indicate storage is full
    Monitoring Interval TimeSetting range of automatic monitoring interval time: 1 ~ 999 h
    Data AccessData access function: “READ” symbol display
    Power ConsumptionStandby: 25mA Max, Measurement: 400mA Max
    Alarm IndicationAudible & visible alarm
    Alarm SettingDetector panel button setting or background setting
    Alarm Threshold Setting Resistance: 0Ω～2000Ω
    Low Power Supply Voltage IndicationWhen the power supply voltage drops below 11V, a low voltage symbol will be displayed to alarm the user to replace the power supply.
    Detector Dimension130mm×90mm×54mm
    WeightApprox. 380g
    Overload ProtectionWhen measurement earth resistance: between E-P, E-C each interfaces AC 280V/3 second
    Insulation ResistanceAbove 10MΩ (500V between the circuit and the housing)
    Withstand VoltageAC 3700V/rms (between the circuit and the housing)
    Electromagnetic PropertyIEC61010-4-3,Wireless frequency electromagnetic field ≤1V/m
    Safe StandardIEC61010-1, IEC1010-2-31, IEC61557-1,5, IEC60529(IP54), pollution degree 2, CAT Ⅲ 300V
    Working Temperature & Humidity- 10℃～40℃；below 80%RH
    Storage Temperature & Humidity- 20℃～60℃；below 70%RH

    Model Comparison

    Product PictureModelResistance RangeVoltage RangeCommunication ModeAlarm Function
    EM2900 (1).jpgEM29000.01Ω～2000ΩAC 0V～600VRS485 communicationCustom alarm threshold setting
    EM2900B (1)(1).pngEM2900B0.01Ω～2000ΩAC 0V～600VRS485 communication, 4G communicationCustom alarm threshold setting 

    Product Video

    Related Products
    EM2900 Earth Resistance Online Detector
    EM2900B Earth Resistance Online Detector
    EM3350 Large Grounding Network Earth Resistance OnLine Monitor
  • Product
  • About
  • Case
  • News
  • Service
  • Contact
      • Contact Us

    +86 13802922567 (Johnson Zhang)

    [email protected]

    10th Floor, Block 5, Liandong Intelligent Manufacture Park, No. 105, Shilong North Road, Nanhai District, Foshan City, Guangdong, China

    All Rights Reserved © Guangdong ETCR Electronic Technology CO.,Ltd 2025
    Site Map
    Independent Station

    Home
    Tel
    Product
    Contact