簡介
EM4058
- 解析度0.01Ω。
- 自動切換範圍，電阻測量最高可達20kΩ。
- 接地電阻測量。
- 多頻率測量電流（270Hz - 570Hz - 870Hz - 1,170Hz - 1,470Hz）。
- 使用Wenner法自動測量及計算接地電阻率。
- 高干擾（雜訊）抑制。
- 內建記憶體。
- 採用更安全可靠、續航力更長的LFP（ LiFePO4磷酸鐵鋰）可充電電池。
- 解析度0.01Ω。
- 自動切換範圍，電阻測量最高可達20kΩ。
- 接地電阻測量。
- 多頻率測量電流（270Hz - 570Hz - 870Hz - 1,170Hz - 1,470Hz）。
- 使用Wenner法自動測量及計算接地電阻率。
- 高干擾（雜訊）抑制。
- 干擾電壓測量。
- 內建記憶體。
- 內建印表機。
- USB介面及遠端控制介面。
- 採用更安全可靠、續航力更長的LFP（LiFePO4磷酸鐵鋰）可充電電池。
- 系統介紹：
- 為數位式微處理器控制型儀器，採用Wenner法測量接地電阻與接地電阻率及偵測存在接地中的寄生電壓，適用於測量電力變電所、工業、配電網路等的接地系統，符合IEC 61557-5標準。
- 具有頻率掃描功能，能自動以所有可用的頻率執行接地電阻測量及計算、顯示和列印平均結果與各個頻率的個別結果。
- 內建記憶體，可儲存測量值；內建印表機及配備USB介面，可將測量值傳輸到電腦或資料記錄器，以供後續分析；並具有遠端連線介面，可透過Android行動裝置進行遠端控制。
- 可攜式、輕量強固，適於現場及惡劣環境下使用。
- 操作頻率：
- 電阻或電阻率測量：270Hz。
- 電阻測量：570Hz、870Hz、1170Hz或1470Hz。
- 最大偏差：±1Hz（電阻及電阻率）。
- 電壓計：可測量由寄生電流產生的電壓。
- 測量範圍：
- 電阻：0～20Ω；0～200Ω；0～2000Ω；0-20kΩ（自動切換範圍）。
- 電阻率：0～50kΩm（自動切換範圍）。
- 電壓：0～60V。
- 精度：
- 電阻及電阻率測量：
- R ≤ 2kΩ：±（2% rdg.± 2位數）。
- R > 2kΩ：±（5% rdg.± 2位數）。
- 電壓測量：±（3% rdg.± 2位數）。
- 電阻及電阻率測量：
- 讀值解析度：
- 電阻測量：0.01Ω。
- 電阻率測量：0.01Ωm。
- 電壓測量：0.1V。
- 輸出電流：短路電流限制為＜20.0mArms（符合IEC 61557-5 - 4.5標準）。
- 介面：USB。
- 內建印表機：用於列印測量值，以作為記錄文件。
- 電源：內部LFP可充電電池（LiFePO4 12V - 3000 mAh)。
- 電池充電器：AC轉接器12V - 2.0A。
- 符合安規：IEC 61010-1。
- 符合EMC：IEC 61326-1。
- 靜電耐受性：IEC 61000-4-2。
- 電磁輻射耐受性：IEC 61000-4-3。
- 保護等級：關閉上蓋時為IP54。
- 詳細規格、配件、軟體及選購，歡迎洽詢。
- 0.01Ω resolution
- Up to 20 kΩ resistance measurement with autorange
- Earth resistance measurement
- Multi-frequency measurement current (270 Hz – 570 Hz - 870 Hz - 1,170 Hz - 1,470 Hz)
- Automated measurement and calculation of ground resistivity using Wenner’s formula
- High interference (noise) rejection
- Interference voltage measurement
- Built-in memory
- Built-in printer
- USB interface and remote interface
- Powered by LFP (LiFePO4) rechargeable battery, a safer, more reliable and longer-lasting battery
- System Overview:
- The EM4058 earth tester is a digital, microprocessor controlled instrument that allows to measure the earth resistance and ground resistivity (using Wenner´s method), as well as to detect parasitic voltages present in the ground. This instrument is suitable to measure earth systems in power substations, industries, distribution networks, etc., according to IEC 61557-5.
- The EM4058 has a Frequency Scan feature that performs an earth resistance measurement with all available frequencies automatically and calculates, displays and prints the average result besides the individual result of each frequency. Those results are saved on the internal memory.
- The EM4058 has a built-in memory to store measurements and a built-in printer, besides the USB interface that allows to communicate measured values to a computer or data logger for their later analysis and has a remote interface that allows remote control of it through an Android device. It is a portable, strong and lightweight equipment, suitable to be used out in the field and under severe weather conditions.
- Operation Frequency:
- 270 Hz (resistance or resistivity measurement)
- 570 Hz, 870 Hz, 1170 Hz or 1470 Hz (resistance measurement)
- Max. variation: ± 1 Hz (both cases).
- Voltmeter: In the voltmeter function, the equipment operates as a conventional voltmeter, making it possible to measure voltages generated by parasitic currents.
- Measurement Ranges:
- Resistance: 0-20 Ω; 0-200 Ω; 0-2000 Ω y 0-20 kΩ (auto ranging).
- Resistivity: 0- 50 kΩm (auto ranging)
- Voltage: 0-60 V~
- Accuracy:
- Resistance and Resistivity measurements:
- R ≤ 2 kΩ: ± (2% of the measured value ± 2 digits).
- R > 2 kΩ: ± (5% of the measured value ± 2 digits).
- Voltage measurement: ± (3% of the measured value ± 2 digits).
- Resistance and Resistivity measurements:
- Reading Resolution:
- 0.01Ω in the resistance measurement;
- 0.01Ωm in the resistivity measurement;
- 0.1V in the voltage measurement.
- Output Current: The short-circuit current is limited to less than 20.0 mARMS (according the IEC 61557-5 - 4.5).
- Interface: USB
- Built-In Printer: for a printed register document of measured values.
- Power Supply: Internal Rechargeable Lfp Battery (Lifepo4 12 V - 3000 Mah).
- Battery Charge: Ac adapter (12 v - 2.0 a).
- Safety Class: in accordance with IEC 61010-1.
- E.M.C.: In accordance with Iec 61326-1.
- Electrostatic Immunity: In accordance with IEC 61000-4-2.
- Electromagnetic Irradiation Immunity: In accordance with IEC 61000-4-3.
- Environmental Protection: IP54 with closed lid.
- Please feel free to contact for detailed specifications, accessories, software and options.