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)
|
√
|
Features
|
Measuring method
|
Earth resistance: rated current pole changing method with Max 20mA measuring 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
|
|
√
|
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 symbole 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
|
Standard Quantity Per Carton
|
4pcs
|
Standard Carton Measurement
|
650mm×560mm×300mm
|
Standard Carton Cross Weight
|
30kg (including batteries)
|