UNI T 4 Pole Soil Resistance Earth Tester Meter UT523A is specially designed and manufactured for measuring earth resistance, soil resistivity, earth voltage, AC voltage.UT-523A earth resistance meter, adopting the latest digital and micro-processing technology, precise 4-pole, 3-pole, and simple 2-pole method for earth resistance measurement, importing FFT, and AFC technology. This earth resistivity meter with a unique function of anti-interference capability and the ability to adapt to the environment, consistency of repeat testing, to ensure high precision, high stability, and reliability for the prolonged measure. This ground resistance meter is widely used in electric power, telecommunications, meteorology, oil field, construction, lightning protection, industrial electrical equipment and other earth resistance, soil resistivity, earth voltage, AC voltage measurement.

Features:

• UT523A intelligent earth resistance tester is designed to measure earth resistance, soil resistivity, earth voltage, and AC voltage.
• It used accurate 4-pole, 3-pole, and simple 2-pole methods to measure earth resistance.
• Fast Fourier Transform(FFT) and Auto frequency control(AFC) are integrated into this tester.
• So it has a unique anti-interference capability and also is more reliable.

Specifications:

• Earth resistance: 0.00Ω～19.99Ω   ±(2%+5), 20.0Ω～199.9Ω    ±(2%+5), 200Ω～1999Ω    ±(2%+5), 2.00kΩ～19.99kΩ    ±(2%+5), 20.0kΩ～210.0kΩ    ±(2%+5)
• Soil resistivity: 0.00Ωm～99.99Ωm, 100.0Ωm～999.9Ωm, 1000Ωm～9999Ωm, 10.00kΩm～99.99kΩm, 100.0kΩm～999.9kΩm, 1000kΩm～9000kΩm, Decided by measuring precision of R: (ρ=2πaR  a:1 m～100m, π=3.141)
• Earth voltage: AC 0.00～750V, ±(2%+5)
• Testing resistance: 128Hz/111Hz/105Hz/94Hz(AFC)
• Measuring method: Earth resistance: rated current pole changing method with Max 20mA measuring the current; soil resistivity: quadrupole method (Wen-Na method ); earth voltage: average rectifier (between P(S) and ES interfaces)
• Short-circuit testing current: AC 30mA max  
• Open-circuit testing voltage: AC 40V max  
• Auto range: Yes    　 
• Distance between electrodes: 1m～200m can be set.
• Testing voltage waveform: Sine wave  
• Line voltage: Measure when the voltage is below 750V AC
• Low battery indicator: ≤7.5V 
• Data hold: Yes 
• Alarm function: Yes 
• RS232 interface: Yes
• Withstand voltage: AC 3700V/RMS (between circuit and case) 
• LCD backlight: Yes 
• Data storage: 300 groups 
• Auxiliary earth resistance test: 0.00KΩ～30kΩ(100R+rC<50kΩ, 100R+rP<50kΩ)
• Overload protection: Earth resistance measurement: input 280V AC between C(H) and E, P(S) and ES for 3s
• Interference test: Auto identify interference signals, when interference voltage is higher than 5V, the symbol NOISE is displayed.
• Measuring time(s): More than 5000 times (perform short circuit test once, and again after the 30s) 
• Insulation resistance: Above 20MΩ (500V between circuit and case)
• Power supply: DC 9V (6 Zinc-manganese dry batteries, R14S 1.5V; can continuously standby for 300hrs)
• LCD size: 128mm×75mm
• Product color: Red and grey
• Product weight: 1443g (including batteries)
• Product size: 215mm×190mm×95mm

Package Includes:

     1 x UNI T 4 Pole Soil Resistance Earth Tester Meter UT523A