Rabu, 13 April 2016

SEW 4235ER Earth Resistance & Resistivity Testers


SEW 4235ER Earth Resistance & Resistivity Testers

FEATURES
  • Microprocessor-controlled.
  • Earth resistivity (ρ) test.
  • Earth testing at 20Ω, 200Ω, 2kΩ.
  • Earth voltage measuring : 0-300V 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.

Specification



Measuring ranges
Earth Resistance
 0-20Ω / 0-200Ω / 0-2kΩ
 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
0-2kΩ : 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.
Weight (battery included)
Approx. 1430g
Power source
1.5V (AA) × 8

Safety standards
EN 61010-1 CAT IV 300V
IEC 61557-1  IEC 61557-5
EN 61326-1

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