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    1. 台湾标准电机SEW仪器仪表--2120 ER Earth Resistance Testers 3 Wire Digital
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        2120 ER   Earth Resistance Testers
        3 Wire (Digital)  
        2120 ER
         Capable of measuring earth voltage.
         2mA measuring current permits eath resistance to test without tripping earth leakage current breakers in the circuit.
         Test leads are supplied as standard accessories for simplified two-wire measuring system.
         0 Ohm adjustment.
         Data hold function.
         Battery operated.
         Battery life indicator.
         Designed to meet ,CAT III 200V.
         Calibration performed with supplied test leads.
        Measuring Ranges Earth Resistance : 0-20 Ohm/0-200 Ohm/0-2000 Ohm
        Earth Voltage : 0-200V AC (40-500Hz)
        Accuracy Earth Resistance : +/- (2%rdg+2dgt) or +/- 0.1 Ohm, which is greater
        Earth Voltage : +/- (1%rdg+2dgt)
        Earth Resistance Resolution 0-20 Ohm (0.01 Ohm)
        0-200 Ohm (0.1 Ohm)
        0-2000 Ohm (1 Ohm)
        Measuring System Earth Resistance by constant current inverter 820 Hz approx. 2mA
        Low Battery Indication symbol appears on the diaplay
        Data Hold Indication symbol appears on the display
        Over Range Indication "1" (MSD)
        Open Circuit Indication LED will be unlit
        Display LCD LCD 3-1/2 digit (2000 counts)
        Power Source 1.5V SUM-3 (AA) x 8 or equivalent
        Dimensions 210(L) x 210(W) x 100(D) mm
        Weight Approx. 1395g (battery included)
        Accessories Test leads (AL-36 : red-15m, yellow-10m, green-5m)
        Simplified measurement probe
        Auxiliary earth spikes, shoulder belt
        Instruction manual, batteries
        特 點
        ● 供量測接地電阻(Ω)和接地電壓(ACV)。
        ● 量測電流僅有2mA,不會影響漏電斷路器的跳脫。
        ● 可作三線式或兩線式量測。
        ● 接線正確,在量測接地電阻時,紅燈(LED)會作顯示。
        ● 有0Ω歸零設計。
        ● 數值鎖定功能。
        ● 電源不足顯示。
        ● 請使用提供的測試線量測。
        ● 符合 CAT III 200V
        規 格 (23°C±5°C <80%R.H.)
        量測檔位 接地電阻 : 0-20Ω/0-200Ω/0-2000Ω
        接地電壓 : 0-200V AC
        準確度 接地電阻 : ±(2%讀值+2位數)
        接地電壓 : ±(1%讀值+2位數)
        接地電阻解析度 0-20Ω : 0.01Ω
        0-200Ω : 0.1Ω
        0-2000Ω :
        量測系列 820Hz 2mA定電流
        顯示器 液晶顯示器(LCD)3位 Z大顯示1999
        接線正確並作量測 紅燈(LED)會亮著
        電量不足指示 LCD 上出現 :符號
        數值鎖定指示 LCD 上出現 :符號
        過載指示 LCD 上出現 : 1
        外形尺寸 210(長)×210(寬)×100(高)mm
        重量 約1395克(含電池)
        使用電池 1.5V (AA)×8(顆)
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