MY-5203S Handheld Contact Resistance Tester Micro Ohmmeter 300A for Circuit Breaker Grounding Bar Busbar Test with Bluetooth

MY-5203S Handheld Contact Resistance Tester Micro Ohmmeter 300A for Circuit Breaker Grounding Bar Busbar Test with Bluetooth

Product Description

1.This handheld double-ended grounded loop resistance tester supports 200A high-current output, integrates traditional and intelligent non-disassembly ground bar test modes, and provides high-precision measurement for loop resistance and contact resistance of high-voltage switches.
2.Dual test modes: Supports traditional loop resistance mode and intelligent test mode, enabling non-disassembly ground bar operation for safer and more efficient testing.
3.200A high current & fast test :200A stable output ensures accurate loop resistance and contact resistance results; intelligent mode completes measurement in ≤5s.
4.Wireless clamp & safe design :Built-in wireless clamp meter for non-contact measurement; double-ended grounding effectively prevents induction electric
5.High precision & easy operation : 0.01μΩ resolution, 7-inch touch screen, data storage, U disk export and voice broadcast for convenient use.
6.Full protection & portable : Overcurrent, overheating and battery protection; lithium battery powered, handheld and adaptable to field working conditions.

Product Alias

Handheld Loop Resistance Tester / Handheld Contact Resistance Tester / Portable Micro Ohmmeter / Handheld Micro Ohm Meter / Portable Contact Resistance Tester

Feature

1.200A large test current, 4 adjustable levels (50A/100A/150A/200A)
2.Micro-ohm high resolution: 0.0001 μΩ (5 significant digits), accuracy ±(0.5%rdg+0.2μΩ)
3.Wide test range 0-80mΩ, DC 10V open-circuit voltage
4.Full touch color screen with Chinese/English language switch
5.Built-in thermal printer for on-site report printing
6.U-disk one-key data export, supporting PC software analysis
7.RS232 serial communication (115200 baud) & Bluetooth wireless data transmission
8.Waterproof portable ABS case for harsh substation field use
9.Compact design: 380×280×330mm, 10kg
10.2-year warranty & lifetime technical support

Product Parameters

Application Scenarios

FAQ

Question 1: What is this handheld loop resistance tester and what is it mainly used for?
Customer: Is this a handheld instrument? What equipment can it test?
Manufacturer: Yes, this is a handheld loop resistance tester (contact resistance tester) with a clamp design and touch screen. It is specially designed for measuring the contact resistance (DC resistance) of grounding bars, high-voltage switchgear, circuit breakers, disconnectors, busbar connection points, current transformers and cable joints. The large clamp opening (up to 84mm) allows quick clamping onto grounding bars and busbars without disassembling the wiring. It is widely used in substation preventive tests, grounding system inspection, commissioning tests and post-maintenance checks.
Question 2: What are the main technical specifications?
Customer: What is the test current and measuring range of this tester? Does it support battery power?
Manufacturer: The tester outputs a large test current of 200.0A to ensure stable micro-ohm measurement. It is powered by a built-in rechargeable battery (battery level displayed on screen), fully suitable for outdoor field work without external power. The instrument also shows ambient temperature on the screen for reference. With high resolution micro-ohm measurement (displayed in μΩ, e.g. 125.55 μΩ), it can accurately reflect the contact condition of the tested joints.
Question 3: What are the advantages of the handheld design for field use?
Customer: We often work in outdoor substations. Is this tester convenient to carry and operate?
Manufacturer: Absolutely. The handheld design makes it lightweight and easy to carry with one hand, suitable for climbing towers, walking long distances in substations and working in narrow spaces. The rubber-protected rugged housing provides waterproof, dustproof and shockproof performance, adapting to harsh outdoor environments (high temperature, rain, strong electromagnetic interference). The full touch color screen with Chinese/English language switch makes operation simple even for first-time users. It can complete a test in seconds with one-key start.
Question 4: How to transfer and manage the test data?
Customer: Can the test data be transmitted to a phone or computer for analysis?
Manufacturer: Yes. The tester supports Bluetooth wireless transmission (Bluetooth name is displayed on the device), allowing data to be sent to a mobile phone or computer wirelessly. It also supports RS232 serial communication (115200 baud rate, configurable data bits and stop bits) for connection to PC software, enabling data analysis, report generation and long-term trend tracking of contact resistance. Test results are clearly displayed on the touch screen immediately after each test.
Question 5: What about the warranty and after-sales service?
Customer: What is the warranty period? Do you provide technical support and training?
Manufacturer: We provide a 2-year free warranty for the whole machine, and free repair service for failures caused by non-artificial quality problems during the warranty period. We also provide lifetime technical support: our engineers can guide you through operation and troubleshooting by phone, email or remote video. For first-time users, an operation manual, video tutorials and standard wiring diagrams are provided. Please contact our after-sales team before repair and do not disassemble the instrument by yourself.
Question 6: Shipping Method
Customer: If we place an order, how do you typically ship the goods? Will there be any issues with transporting bulky items such as reactors?
Manufacturer: We default to using dedicated logistics lines or brand-specific express shipping services; small-sized main units and accessories may also be shipped via standard courier services. Large items, such as reactors and excitation transformers, are packed using wooden crates or wooden frames for reinforcement to prevent bumps and moisture exposure during transit; a packing list is included with each package to facilitate item-by-item counting for you. Logistics costs are typically determined by both parties in accordance with the contract terms; after shipment, we will send you both the tracking number and the carrier's contact phone number for easy tracking.If your project site is remote or if delivery to the site is required with a specified logistics company, please inform us in advance when placing your order; we can then coordinate and arrange accordingly.
Question 7: Delivery Lead Time
Customer: Our project is under tight deadlines; how long will it take for the order to be shipped after we place it? Can we request expedited shipping?
Manufacturer: Standard specifications – stock available; typically delivered upon receipt of the order. Orders can be shipped within [X] working days; for non-standard products requiring customized voltage levels, capacities, or reactor combination configurations, the production cycle typically ranges from [X] to [Y] days.The delivery time will be approximately 7-15 working days; the specific timeline shall be subject to the sales confirmation provided upon order placement. If your project has a tight schedule, please inform us of the latest expected delivery date before placing your order; we will first verify the production schedule and inventory status, and where possible, will coordinate expedited production and prioritize shipment. However, it is recommended to allocate sufficient transit time for logistics to avoid delaying on-site testing.
Question 8: After-sales Service and Warranty
Customer: What is the warranty period for this equipment? If any issues arise during on-site use, how will your after-sales service respond?
Manufacturer: We provide a two-year free warranty on the entire unit and lifelong technical support services. During the warranty period, if issues arise due to defects in the equipment itself, we will provide free repair or replacement of components; when problems occur on-site, we commit to responding within 24 hours; most wiring and parameter configuration issues can be resolved through remote guidance via video or telephone; for cases where an on-site visit is necessary, we will arrange for our technicians to arrive at the location to resolve the issue. After the warranty period expires, we still offer repair services, with spare parts supplied at cost price for the long term, and software updates provided free of charge for life. Upon delivery of the equipment, we also offer free operational training (video operation guides)to ensure that your testing personnel can operate the equipment independently and proficiently; should you have any further questions, please feel free to contact our dedicated after-sales hotline directly.
Question 9: Shipping methods for each region (Sea freight)
Customer: Our projects are distributed across several states, and our procurement volumes are substantial; are the shipping methods consistent across all states? How is the delivery time calculated?
Manufacturer: The specifications are identical; however, it should be specifically noted that this equipment set is large in size and heavy in weight—components such as the reactor and excitation transformer are all classified as heavy components. Therefore, regardless of which state or region the shipment is destined for, we will uniformly utilize sea freight transportation. The packaging employs export-grade wooden crates with reinforced structures, along with moisture-proof and rust-proof treatments; the design of these wooden crates is optimized for long-distance sea transport and multiple lifting and transshipment operations. Upon arrival at the destination, simply unpack the goods and conduct an inspection before putting them into use. Regarding delivery time, the sea freight transit period depends on the port of destination: near-sea routes are generally faster, whereas ocean routes may take longer; the exact number of days will be confirmed based on the shipping schedule specified in the bill of lading. We have a dedicated freight forwarding agency to handle booking of shipping space, customs declaration, insurance, and other related procedures; once the vessel departs, we will send you documents such as the bill of lading and the packing list, enabling you to arrange for the receipt of goods at the port of destination and their inland transshipment in advance

Shipping scenario

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