ST2241 Chinese factory Upscale portable digital earth resistance meter
1.Basic introduction
Product Name: Chinese factory professional portable digital earth resistance meter
Function: grounding resistance, soil resistivity;Ground voltage, AC voltage measurement
Soil Resistivity Range: 0.00Ωm~1kΩm
Resistance Range: 0.00Ω~100.0kΩ
Voltage Range: AC 0.0~600V
Measurement Method: precision four-wire, three-wire measurement, simple two-wire measurement
Line Voltage: measure below AC 100V
Application: ST2241 soil resistivity earth resistance tester is adopted the latest digital and micro-processing technology and can accurately detect ground resistance, soil resistivity, and ground voltage. It uses a fast filtering technique to minimize interference. Displaying the resistance value of the auxiliary electrode in the same screen, which is convenient for judging the measurement error caused by environmental factors, facilitating more accurate measurement of the grounding true resistance value.Widely used in telecommunications, electricity, meteorology, computer rooms, oil fields, power distribution lines, iron tower transmission lines, gas stations, factory grounding networks, lightning rods and so on. The instrument has the characteristics of precise, fast, simple, stable and reliable.
2.Technical Parameters
2.1 Baseline and working conditions
|
Impact |
Benchmark condition |
Working conditions |
Note |
|
Auxiliary grounding resistance value |
< 100Ω |
< 100kΩ |
rC, rP |
|
Electrode distance when measuring R |
a> 5d |
a> 5d |
—- |
|
Electrode distance when measuring ρ |
a>20h |
a>20h |
—- |
|
Ambient temperature |
23℃±1℃ |
-10℃~40℃ |
—- |
|
Environment wet crossing |
40% ~ 60% |
<80% |
—- |
2.2.General specifications
|
Function |
Two, three or four wires measure ground resistance and soil resistivity;Ground voltage, AC voltage measurement |
|
Power supply |
DC 8.4V (2 rechargeable lithium batteries) |
|
Range |
Ground resistance: 0.00Ω~100.0kΩ |
|
Soil resistivity: 0.00Ωm ~ 1kΩm (then multiplied by the coefficient 2πa) |
|
|
Measurement method |
Precision 4-wire, 3-wire measurement, simple 2-wire measurement of ground resistance |
|
Short-circuit test current |
AC ± 20mA max |
|
Open circuit test voltage |
AC ± 20V max |
|
Test voltage waveform |
square wave (1KHz) |
|
Electrode pitch range |
can be set from 1m to 10m |
|
Standard test line |
4 strips: 2 strips of 20m length, 2 strips of 10m length |
|
Simple test lead |
2 strips: 1.0m yellow, 1 each green 1.0m |
|
Auxiliary ground rod |
4 pieces:φ10mm×150mm |
|
Line voltage |
AC 600V or less |
|
USB interface |
With USB interface, software real-time monitoring, stored data can be uploaded to the computer, save and print, soil layer analysis and other functions |
|
Communication line |
1 USB cable, 1.5m long |
|
Auxiliary ground test |
With auxiliary ground resistance value test function, but must meet R + rC <50kΩ, R + rP <50kΩ R is the measured ground resistance |
|
Working temperature and humidity |
-10℃~40℃; |
|
Storage temperature and humidity |
-20℃~60℃; |
2.3.Basic error and performance index under reference conditions
|
Measurement function |
Measuring range |
Precision |
Resolution |
|
Ground resistance(R) |
0.200Ω~2.000Ω |
±5%rdg±5dgt |
0.001Ω |
|
02.00Ω~20.00Ω |
±2%rdg±3dgt |
0.01Ω |
|
|
020.0Ω~200.0Ω |
±2%rdg±3dgt |
0.1Ω |
|
|
0200Ω~2000Ω |
±2%rdg±3dgt |
1Ω |
|
|
02.00kΩ~20.00kΩ |
±5%rdg±5dgt |
10Ω |
|
|
Soil resistivity(ρ) |
depends on the measurement range of R (ρ=2πa(R÷100) a:1 m~100m;π=3.14) (ρmin = 1.256Ωm , ρmax = 125.6KΩm ) |
||
|
Ground voltage |
AC 0.0~600V |
±2%rdg±3dgt |
0.1V |
Note: 1. When rC or rP is larger, the additional error is ≤ ± 3% rdg ± 5dgt.(rC max < 50kΩ; rP max < 50kΩ)
3.Applicable scene
Ground resistance test AC step voltage test Soil resistivity test
Q: Are you a factory or a trading company?
A: We are professional testing equipment manufacturer.
Q: When can I get the price?
A: Usually we quote within 12 hours after we get your enquiry. You can also place an order directly on the product page.
Q: What are your Delivery terms?
A: We accept EXW, FOB, CFR, CIF, CPT, you can choose convenient and cost-effective.
Q: What is the payement terms?
A: T/T bank transfer,L/C,western union,we suggest your side to pay online of alibababy credit card,and trade assurance.
Q: What about the after-sale service?
A: Guaraantee period is 12 months,after the warranty,we also provide life-long paidrepair or service.
Q: What about the delivery date?
A: Usually we offer 1-2 weeks after order confirmed and payment received,and we can also accept urgent order for prompt shipment.
Q: What about the transportation?
A: It depends on your requirement.We can delivery by air to your airport, or by sea to your seaport, ordelivery to your office address by express courier, and we also accept to cooperate with your ship agentor forwarder.
Q: What about the package?
A: Usually we offer wooden cases, or multilayer carton boxes inner with plastic filmwrapped, or customized foam or aluminum suitcase, we will offer package pictures for customer referencebefore delivery out the goods.
Q: What about the M.O.Q?
A: Usually we do not have M.O.Q, we can offer even only 1 unit, while, you are welcome to order in bulk, andwe are quite pleasure to offer pleasant outstanding discount.
Q: What about the power supply?
A: Usually we offer 110V/50HZ, and we can also convert the power suooly to meet your local power supply, kindly contact us for confirmation.
Q: Are your operation keypad, interface, software and manual in English version?
A: Yes, its operation keypad, interface,software and manual in English version if you need other languages,kindly contact us for confirmation.
Q: Can you offer quality certification?
A: Yes, we can offer quality certification issued by our lab free of charge, or issued by third-party international inspection Organization with extra charge please cantact us for confirmation.
Q: Can you do the calibration and installation before handover the goods?
A: Yes, we do installation, checking and calibration works before packed and handover the goods. Customer can do tests directly only after some simply installation.
How to place an order?
Q: How to confirm the order?
A: You can send us your purchase order, sign&stamp back by us to make the order be confirmed, or send us email mention us the order was confirmed by your side, then attached the proforma invoice with bank information by return the email from us to confirm the order, Or you can start order online of alibaba,com by Secure payment or trade assurance, please contact us for further detail confirmation.
Q: How to pay?
A: Please send us the paymengt by T/T(Telegraphic Transfer), and send us copy of payment,so that we can arrange its process.You can also pay ue by West union, and we also accept order and pay online of alibaba.com by Secure payment or trade assurance, please contact us for further detail confirmation.
Q: What is the valid for the PI(proforma invoice)?
A: Considering the changing of the freight charge, Please do the transfer within 2 weeks.
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