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臺灣標(biāo)準(zhǔn)電機(jī)SEW儀器儀表--2720 ER Earth Resistance Testers 3 Wire Digital

2720 ER Earth Resistance Testers
3 Wire (Digital)

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(diǎn)

● 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(shù)值鎖定。
● 使用電池操作。
● 電源不足顯示。
● 自動關(guān)機(jī)設(shè)計(jì)(約3至5分鐘)。
● 請使用提供的測試線測試。
● 設(shè)計(jì)有防塵保護(hù)蓋，避免極插座潮濕或污損。
● CAT III 200V

規(guī) 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(zhǔn)確度	接地電阻 : ±(2%讀值+2位數(shù)) 接地電壓 : ±(1%讀值+2位數(shù))
接地電阻解析度	0-20Ω : 0.01Ω 0-200Ω : 0.1Ω 0-2000Ω : 1Ω
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(xiàn) :符號
數(shù)值鎖定指示	LCD 上出現(xiàn) :符號
過載指示	LCD 上出現(xiàn) : 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)