KYORITSU 4105A - Manual (Page 4)

3. Specifications
Measuring Range and Accuracy (at 23 5°C and RH 75% or less)
Range Measuring Range Accuracy
Earth Voltage 0 - 199.9V 1.0% rdg 4 dgt
20 Ω 0 - 19.99 Ω 2.0% rdg 0.1 Ω ( 0 - 19.99 Ω )
Earth 2.0% rdg 3 dgt( above 20 Ω )
Resistance
200 Ω 0 - 199.9 Ω
(Auxiliary earth resistance 100 Ω 5%)
2000 Ω 0 - 1999 Ω (Earth voltage 10V or less)
Electromagnetic compatibility(Radiated RF immunity & IEC61000-4-3)
RF field strength = ≤ 1V/m, total accuracy : specified accuracy
RF field strength = 3V/m, total accuracy : specified accuracy +5% of
range
Applicable Standards
IEC 61010-1 Overvoltage CAT III 300V Pollution Degree 2
IEC 61010-2-31
IEC 61557-1,5
IEC 60529 (IP54)
Measuring Method
Earth voltage measurement
Average sensing
Earth resistance measurement
Constant current inverter
Frequency : Approx. 820Hz
Measuring current : 20 Ω range Approx. AC 3mA
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2. Features
MODEL 4105A is an earth resistance tester for testing power distribution
lines, in-house wiring system, electrical appliances etc. It also has an earth
voltage range for earth voltage measurement.
Designed to safety standard IEC 61557.
Dust and drip proof construction in conformity with IEC 60529 (IP54).
Measurement can be made even under adverse weather conditions.
Large, easy-to-read LCD digital display.
Simplified measurement probe has a structure that both the alligator clip
and the test bar are available.
Warns when earth resistance of auxiliary earth spikes exceeds the
permissible limit.
Convenient carrying soft bag for accessories etc.
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