台湾标准电机SEW仪器仪表--2720 ER Earth Resistance Testers 3 Wire Digital
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            2720 ER   Earth Resistance Testers
            3 Wire (Digital)  
            2720 ER
            FEATURES
             
             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.
             Data hold function.
             Battery operated.
             Battery test indicator.
             Timer for test function (count 3~5 minutes).
             CAT III 200V.
             Calibration performed with supplied test leads.
            SPECIFICATIONS
             
            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)
            Display LCD LCD 3-1/2 digit (2000 counts)
            Power Source 1.5V SUM-3 (AA) x 6 or equivalent
            Dimensions 205(L) x 90(W) x 55(D) mm
            Weight Approx. 550g (battery included)
            Accessories Test leads (AL-36 : red-15m, yellow-10m, green-5m)
            Simplified measurement probe
            Heavy-duty case
            Instruction manual, batteries
            特 點
            ● 可供量測接地電阻和接地電壓。
            ● 量測電流僅有2mA,不會影響漏電斷路器的跳脫。
            ● 可作三線式量測或兩線式量測。
            ● 量測數值鎖定。
            ● 使用電池操作。
            ● 電源不足顯示。
            ● 自動關機設計(約3至5分鐘)。
            ● 請使用提供的測試線測試。
            ● 設計有防塵保護蓋,避免極插座潮濕或污損。
            ● 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 205(長)×90(寬)×55(高)mm
            重量 約550克(含電池)
            使用電池 1.5V (AA)×6(顆)
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