ProSight ES3050 1A DC Low-Resistance Tester – Digital Micro-Ohmmeter
The ProSight ES3050 is a portable digital micro-ohmmeter designed for precise low-resistance measurements during electrical testing, commissioning and preventive maintenance. Its four-wire Kelvin measurement method minimises the influence of test-lead and contact resistance, providing reliable measurements of transformer windings, switch contacts, circuit breakers, grounding conductors, cables, busbars and electrical connections. Featuring a regulated 1A test current, large LCD, USB communication and internal data storage, the ES3050 delivers accurate, efficient and dependable measurements in workshops, substations and industrial field environments.
ProSight ES3050 1A DC Resistance Tester Electronic Power 220V
What is the ES3050-1A DC Resistance Tester?
The ProSight ES3050 1A DC Resistance Tester Electronic Power 220V is a high-precision portable instrument developed for measuring extremely low electrical resistance. It is widely used by electrical engineers, maintenance technicians, utility companies, and industrial manufacturers to verify the integrity of electrical connections, transformer windings, grounding systems, relay contacts, switchgear, cables, and metal bonding.
Unlike conventional multimeters, the ES3050-1A uses the four-wire Kelvin measurement method, eliminating errors caused by test lead resistance and providing highly accurate resistance readings. The instrument also measures AC and DC voltage, stores test records, and transfers data to a computer through its USB interface for documentation and analysis.
How It Works
The tester injects a stable 1A DC test current through the device under test while separately measuring the voltage drop across the test points using independent sensing leads. This four-wire technique eliminates measurement errors caused by cable resistance, allowing precise resistance measurements even at very low values. The measured voltage and current are processed to calculate the actual resistance and display the result on the LCD screen.
Why Choose This Product?
- High-accuracy four-wire Kelvin resistance measurement
- Stable 1A test current for reliable low-resistance testing
- Portable, battery-powered design for field and laboratory use
- Measures both resistance and AC/DC voltage
- Large backlit LCD for easy reading
- USB communication for data transfer and reporting
- Stores up to 500 measurement records
- Fast measurement speed improves productivity
- Rugged design suitable for industrial environments
- Built to comply with IEC safety standards
Benefits
- Improves maintenance accuracy
- Detects poor electrical connections before failure
- Reduces equipment downtime
- Speeds up inspection and commissioning work
- Eliminates lead resistance measurement errors
- Simplifies documentation with onboard memory
- Enhances operator efficiency in the field
- Suitable for preventive and predictive maintenance
- Reliable operation in demanding industrial environments