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STANDARD ELECTRIC WORKS CO.,LTD.
MEASURE WITH PRECISION
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Earth Resistance Testers
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4 Wire Earth Resistance & Resistivity Testers
4235 ER
FEATURES
● Microprocessor-controlled.
● Earth resistivity (ρ) test.
● Earth testing at 20Ω, 200Ω, 2000Ω.
● Earth voltage measuring : 0-300.0V AC.
● Automatic C spike check.
● Automatic P spike check.
● 2-Wire test, 3-Wire test, 4-Wire test.
● LCM display.
● Auto ranging.
● Auto power OFF.
● Data hold.
● 200 measurement results can be saved in the memory
and recalled on the display.
● Interval between auxiliary earth spikes is 1.0~50.0m.
SPECIFICATIONS
Measuring ranges
:
Earth Resistance
0-20Ω / 0-200Ω / 0-2000Ω
Earth Voltage
0-300.0V AC
Earth Resistivity (ρ=2 × π × L × R)
0.06~6.28kΩ.m
0.62~62.8kΩ.m
6.28~628kΩ.m
Accuracy
:
Earth Resistance ±2%rdg ± 3dgt
Earth Voltage ±2%rdg ± 3dgt
Earth resistance
resolution
:
0-20Ω : 0.01Ω
0-200Ω : 0.1Ω
0-2000Ω : 1Ω
Measuring system
:
Earth resistance by constant current
Inverter 820Hz approx. 2mA
Temperature
& humidity
:
Operating : 0°C~40°C ≤80% R. H.
Storage : -10°C~50°C ≤80% R. H.
Dimensions
:
250(L) x 190(W) x 110(D)mm
Weight
(battery included)
:
Approx. 1430g
Power source
:
1.5V (AA) x 8
Safety standards
:
EN 61010-1 CAT IV 300V
EN 61557-1 EN 61557-5
EN 61326-1
Copyright © 2010 STANDARD ELECTRIC WORKS CO.,LTD. All Rights Reserved