UT523A Digital Earth Resistance Soil Resistivity Tester

Basic Functions

Range

Best Accuracy

Model

UT523A

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

Decided by measuring precision of R: (ρ=2πaR  a:1 m～100m, π=3.141)

100.0Ωm～999.9Ωm

1000Ωm～9999Ωm

10.00kΩm～99.99kΩm

100.0kΩm～999.9kΩm

1000kΩm～9000kΩm

Earth voltage

AC 0.00～750V

±(2%+5)

Testing resistance

128Hz/111Hz/105Hz/94Hz(AFC)

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Features

Measuring method

Earth resistance: rated current pole changing method with Max 20mA measuring current;
soil resistivity: quadruple 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

√

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

√

Alarm function

√

RS232 interface

√

Withstand voltage

AC 3700V/rms(between circuit and case)

√

LCD backlight

√

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 30s)

√

Insulation resistance

Above 20MΩ (500V between circuit and case)

√

General Characteristics

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

Standard accessories

Standard test lead, simple test lead, batteries, PC software CD, RS232 interface cable

Standard Individual Packing

Tool box, gift box, English manual, warranty card