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HF-GT-202 Multifunction Ground Resistance Tester
Multifunction Ground Resistance Tester is designed for on-site earthing tests. It measures ground resistance, soil resistivity and ground voltage via 2/3/4-wire methods. Built-in FFT and AFC technologies effectively resist interference to ensure accurate, stable readings for power and lightning protection projects.
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The HF-GT-202 Multifunction Ground Resistance Tester, also known as an integrated earth resistance tester, is a high-end device integrating multiple measurement principles. Equipped with a large high-definition segmented LCD screen and microprocessor control, it accurately measures ground resistance through precision 3-wire, simple 2-wire measurement methods.
It is widely applied in telecommunications, power grids, meteorology, computer rooms, oil fields, distribution lines, transmission lines, gas stations, factory earthing grids and lightning arrestor inspection. Featuring high precision, fast response, convenient operation and stable performance.
Controlled by a microprocessor, this instrument accurately tests ground resistance, soil resistivity, ground voltage and DC voltage. Fast filtering technology minimizes onsite interference; it simultaneously displays auxiliary earth resistance values to judge environmental measurement errors and acquire true grounding parameters. It can store up to 500 sets of test data. Users can connect to mobile APP via Bluetooth or upload data to computers through USB cables to realize remote monitoring, historical data retrieval, report generation and intelligent alarm reminders.
The complete set consists of main unit, PC upper computer software, mobile APP software, test leads, USB cable, charger and auxiliary ground rods.
Technical Specifications
| Item | Parameters |
|---|---|
| 2/3-wire Ground Resistance Range | 0.00Ω ~ 20.00kΩ Accuracy: ±1.5%rdg ±7dgt Resolution: 0.01Ω |
| Ground Voltage | 0.000V ~ 750.0V Accuracy: ±1.5%rdg ±50dgt Resolution: 0.001V |
| DC Voltage | 0.000V ~ 1000V Accuracy: ±1.5%rdg ±50dgt Resolution: 0.001V |
| Reference Conditions | 23℃±5℃, relative humidity below 75%RH |
| Power Supply | Built-in 11.1V lithium battery; supports over 1000 continuous measurements under AC earth resistance mode |
| Backlight | Adjustable backlight, applicable for dim environments |
| Test Waveform & Frequency | Sine wave, 128Hz |
| Auto Power Off | Marked as “APO”; auto shutdown after 15 minutes by default, shutdown time customizable |
| Measuring Modes | 3-wire method, simple 2-wire method, mean value rectification |
| Alarm Function | Audible alert when readings exceed preset threshold |
| Screen Size | 5-inch display |
| Measuring Speed | Ground voltage: approx. 3 times/second Ground resistance: approx. 10 seconds per test |
| USB Interface | Available for data reading and record saving |
| Bluetooth APP | Supports remote control, real-time monitoring and data acquisition |
| Data Storage | 500 groups of records |
| Overload Protection | Withstands AC 280V for 3 seconds between H-E and S-E terminals during ground resistance testing |
| Auxiliary Ground Rods | 4 pieces, Φ10mm × 200mm |
| Auxiliary Earth Resistance Test | Range: 0.00kΩ ~ 20.00kΩ |
| Power Consumption | Standby: Max 80mA (backlight off) / Max 90mA (backlight on) Measuring: Max 120mA (backlight off) / Max 130mA (backlight on) |
| Weight | Main unit (with battery): 1880g Test leads (including simplified wires): 861.5g |
| Compliance Standards | IEC61010-1 (CAT III 300V, CAT IV 150V); IEC61010-031; IEC61557 (Ground Resistance Standard) |
Packing List
| No. | Item Name | Qty | Unit | Remarks |
|---|---|---|---|---|
| 1 | Multifunction Ground Resistance Tester Main Unit | 1 | Set | Built-in lithium battery installed |
| 2 | Auxiliary Ground Rods | 4 | Pcs | Φ10mm×200mm |
| 3 | Complete Set of Test Leads | 1 | Set | For 2-wire & 3-wire measurement |
| 4 | Simplified Short Test Wires | 1 | Set | For quick onsite testing |
| 5 | USB Data Cable | 1 | Pc | For PC data transmission & charging |
| 6 | Power Charger | 1 | Pc | For lithium battery charging |
| 7 | Upper Computer PC Software CD | 1 | Pc | Data analysis, report printing |
| 8 | User Manual | 1 | Book | English & Chinese version |
| 9 | Calibration Certificate | 1 | Copy | Factory calibration document |
| 10 | Hard Carrying Case | 1 | Pc | Shockproof portable storage box |
FAQ for Multifunction Ground Resistance Tester
1. What parameters can this multifunction ground resistance tester measure?
It can test ground resistance, ground voltage, DC voltage; it supports 2-wire and 3-wire measuring modes to meet various on-site grounding inspection requirements.
2. What anti-interference design does the instrument adopt?
It is equipped with fast filtering technology to greatly reduce electromagnetic interference on site. It can display auxiliary ground resistance simultaneously to eliminate environmental measurement errors and acquire accurate grounding values.
3. How many groups of test data can be stored?
The internal memory supports storing up to 500 sets of measurement data. Historical records can be reviewed, exported and analyzed anytime.
4. How to export and process the measured data?
Two ways are available: connect to mobile phone APP via Bluetooth for remote control & real-time monitoring; or link to computer through USB cable to generate and print test reports with supporting software.
5. What is the power configuration and battery life?
Built-in 11.1V rechargeable lithium battery. It can finish more than 1000 continuous ground resistance measurements after being fully charged. It also supports automatic power-off to save power.
6. Does it have alarm and prompt functions?
Yes. It will send audible beep alarms when measured data exceeds the preset threshold; adjustable screen backlight is available for dark working environments.
7. What standard accessories are delivered together with the tester?
Main unit, 4 auxiliary ground rods, full set test leads, simplified test wires, USB cable, charger, PC software, user manual and factory calibration certificate.
8. What is the measurement speed?
About 3 times per second for ground voltage testing; around 10 seconds for each ground resistance measurement.
9. Is this instrument compliant with international safety standards?
It strictly complies with IEC61010-1, IEC61010-031 and IEC61557 international grounding testing standards, with reliable overload protection performance.
10. Which industries and application scenarios is it suitable for?
Widely used in power systems, telecommunication stations, meteorological rooms, oil fields, gas stations, factory grounding grids, lightning arrestor detection and power transmission line maintenance.
11. Can the auto shutdown time be adjusted?
Default auto power-off time is 15 minutes, and users can customize the shutdown time according to their actual needs.
12. What protection does the device have against overload?
It features overload protection, which can endure AC 280V voltage for 3 seconds between terminals to effectively protect the internal circuit.
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