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4120 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.
, CAT III 300V.
Calibration performed with supplied test leads.

SPECIFICATIONS

Measuring Ranges	Earth Resistance : 0-19.99 Ohm/0-199.9 Ohm/0-1999 Ohm
	Earth Voltage : 0-199.9V AC (40-500Hz)
Accuracy	Earth Resistance : +/- (2%rdg+2dgt) at 200/2000 Ohm, +/- (2%rdg+0.1 Ohm) at 20 Ohm
	Earth Voltage : +/- (1%rdg+2dgt)
Earth Resistance Resolution	0-19.99 Ohm (0.01 Ohm)
	0-199.9 Ohm (0.1 Ohm)
	0-1999 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 8 or equivalent
Dimensions	250(L) x 190(W) x 110(D) mm
Weight	Approx. 1500g (battery included)
Accessories	Test leads (AL-36 : red-15m, yellow-10m, green-5m)
	Auxiliary earth spikes
	Simplified measurement probe
	Shoulder belt
	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(shù)值鎖定。
● 電源不足顯示。
● 使用電池操作。
● 請使用提供的測試線測試。
● CAT III 300V

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