Handheld 200A Loop Resistance Tester | Battery Micro-Ohmmeter
Product Overview
The ultra light 200a handheld resistance tester (known as the handheld loop resistance tester series) represents a next-generation, ultra-portable diagnostic breakthrough. Engineered to blend seamlessly with the portable contact resistance meter family, this agile instrument is available in two flexible configurations: a 100A standard model and a 200A high-power flagship model. Featuring an intuitive high-resolution color touch screen, it allows substation engineers to perform high-precision, micro-ohm level measurements safely with single-handed operation, completely moving away from traditional, bulky benchtop luggage while delivering a true constant DC output.
Products Description
| Parameter | Specification |
| Selectable Test Current | 100A /200A DC, regular & Fast(F) dual modes |
| Measuring Range | 100A/100A(F):10μΩ~10mΩ;200A/200A(F):10μΩ~5mΩ |
| Measurement Resolution | 0.1μΩ |
| Measurement Accuracy | ±(0.5%×Reading+0.2μΩ) |
| Configurable Test Time | Regular:1/5/10/30/60s(100A);1/5s(200A);Fast(F):fixed 1s |
| Effective Full-Charge Test Cycles | ≥400 times(100A/1mΩ/1s working condition) |
| Built-in Data Storage | Max 100 groups auto-saved measurement records |
| Protection Threshold | Overheat Protection: Battery & power device protection (Threshold: 70°C). |
| Communication Option | BLE4.0 Bluetooth (optional for printer & mini-program data sync), USB data export |
| Casing Material | Insulating ABS anti-oxidation plastic shell |
| Net Weight | ≤1.2kg |
| Dimension | 155×110×70mm(L×W×H) |
Key Features
- Dual-Current Configurations: Choose between the cost-effective 100A version or the heavy-duty 200A flagship model to seamlessly match your local grid testing regulations and project specifications.
- Ultimate Portability: Ergonomically designed as a true handheld loop tester, eliminating the burden of transporting heavy equipment during remote or high-altitude inspections.
- Intelligent Touch Control: Equipped with a vibrant full-color touch interface for seamless menu navigation, real-time data visualization, and instant logging.
- Advanced Noise Immunity: Engineered with high anti-interference circuitry to ensure stable, repeatable readings even within live, high-voltage electromagnetic fields.
- Safe Four-Wire Method: Utilizes the standard 4-terminal Kelvin configuration to automatically eliminate test lead resistance and guarantee top-tier measurement accuracy.
Application Scope
Circuit Breaker Testing: Ideal for checking the health and aging status of main contacts in high-voltage vacuum, SF6, and air circuit breakers (100A/200A selectable based on breaker ratings).
Substation Maintenance: Routinely deployed for measuring the low resistance of high-current busbar joints, disconnectors, and isolation switches.
Industrial Quality Control: Widely used in switchgear manufacturing plants to verify welding spots, cable joints, and high-current terminal connections before commissioning.
Model Selection Guide
- Model-100A (Standard Edition): Engineered for medium and low-voltage switchgear testing, daily distribution network maintenance, and cost-conscious industrial applications requiring a standard 100A injection current.
- Model-200A (Flagship Edition): Specifically designed for high-voltage transmission substation inspections, large-scale circuit breaker commissioning, and strict power utility compliance that mandates a full 200A test current.
Why Choose Us?
- Goodbye to Heavy Equipment
Traditional 200A testers are housed in bulky, heavy suitcases that require two people to carry. Our slim, ergonomic handheld architecture allows a single technician to carry it effortlessly up ladders, into tight switchgear rooms, or across vast outdoor substations.
- Streamlined Field Workflow
No more wasting hours hunting for AC power outlets or dragging hundreds of meters of extension cords in remote areas. This agile instrument is engineered to quickly deploy, inject power, and capture stable readings in seconds-cutting your diagnostic time in half.
- Built for Harsh Industrial Environments
Substations are highly demanding and filled with electromagnetic noise. While ordinary meters fluctuate and deliver ghost readings near live lines, our proprietary shielding technology filters out severe interference to guarantee stable, repeatable data on every click.
- Error-Free Data Export
Forget about manually rewriting microscopic numbers into a muddy notebook in the rain. With integrated smart storage, you can export flawless digital reports onto a standard USB flash drive, ensuring historical traceability and professional documentation for your clients.
Standard Packing List
Every standard package comes fully equipped with the following premium accessories to ensure you can start testing immediately out of the box:
- 1 × Handheld Main Unit (100A or 200A model based on your choice)
- 1 × Heavy-Duty 4-Wire Kelvin Test Leads (High-current copper cables equipped with robust clamps)
- 1 × Power Adapter & Charger (Optimized for safe, fast internal recharging)
- 1 × Rugged Engineered Carrying Case (Waterproof, dustproof, and shock-resistant for harsh field transport)
- 1 × Factory Calibration Certificate & User Manual (Ensuring global standard compliance and easy onboarding)
Troubleshooting
| Fault Code | Failure Reason | Solution |
| E01 | Improper wiring/open circuit of four test terminals | Re-clamp U/I leads per color matching; ensure tight contact between clips and measured workpiece |
| E04 | Instant over-current during measurement | Check DUT for internal short-circuit or abnormal low resistance; stop test and recheck specimen status |
| E08 | Battery undervoltage protection | Terminate test, recharge with original factory charger |
| OL | Measured resistance exceeds instrument upper measuring range | Switch to lower current grade for secondary measurement |
FAQ
Question: What does a micro ohm meter do and what is it used for?
Answer: A micro-ohmmeter is a specialized instrument used to measure extremely low resistances (in the micro-ohm range) to check the health of electrical connections. Our handheld 100A / 200A loop resistance tester series is specifically designed for this purpose-rapidly measuring the contact resistance of high-voltage circuit breakers, busbar joints, and switchgears to prevent catastrophic overheating in substations.
Question: How much does a micro ohm meter cost and how do I choose the right model?
Answer: The cost of a micro-ohmmeter varies significantly based on current output, accuracy, and form factor. Traditional benchtop 200A heavy equipment from legacy brands can be extremely expensive to purchase and transport. To maximize your ROI, we offer two agile versions: the cost-effective 100A model for daily distribution network maintenance, and the 200A flagship model for heavy-duty transmission substation inspections. [Contact us for a factory-direct quote]
Question: What does 200 Ohms mean on a multimeter? Can I use it for breaker testing?
Answer: The "200 Ohms" setting on a standard multimeter means it can measure resistance up to 200 Ohms, but it only injects a few milliamperes of current. It is completely useless for testing high-voltage switchgear contact resistance, which requires accuracy down to 0.01 micro-ohms (µΩ). For power substation safety, you must use a dedicated high-current instrument like our handheld 200A micro-ohmmeter to guarantee error-free readings and break through oxide layers.
Question: What makes this handheld loop tester better than traditional heavy equipment?
Answer: Traditional testers housed in heavy suitcases typically weigh over 15kg and require constant 220V AC mains line power. Our proprietary handheld architecture reduces the total weight, allowing single-handed operation on ladders. With advanced noise immunity and integrated smart storage, you can capture stable readings in live substations and export digital reports directly via a USB flash drive without manually rewriting numbers in harsh field conditions.
Question: Does this compact instrument comply with international testing standards?
Answer: Yes. Both the 100A and 200A models utilize the standard 4-terminal Kelvin testing method to automatically eliminate test lead resistance. The system delivers a stable, pure DC constant current that fully complies with international IEC 62271-100 and IEEE C37.09 standards for high-voltage circuit breaker testing, ensuring your reports are globally recognized.
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