Details

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HIOKI RESISTANCE METER RM3548-50
High-precision Portable Resistance Meter Measures from µΩ 

The RM3548-50 is a precision handheld resistance meter measuring from 0.1 µΩ to 3.5 MΩ. It offers effortless operation and accuracy, making it ideal for EV maintenance, aircraft overhaul, and motor inspections.

Product Introduction Video

Leveraging its precision, the RM3548-50 goes beyond basic resistance measurement. It not only performs temperature correction but also converts resistance to estimated motor temperatures and calculates cable lengths with 1 cm precision. Its versatile probes, including high-durability pin-types and needle probes that measure through paint, meet various maintenance needs. Advanced connectivity enables seamless wireless data output for efficient recording and management of measurements. Ensuring precise readings with a four-wire method and offset voltage compensation (OVC), the RM3548-50 is the go-to tool for dependable precision maintenance.

Key Features

• 0.02% basic accuracy, 0.1 µΩ max. resolution, 1 A max. testing current
• Measure from 0.1 µΩ (testing current 1 A) to 3.5 MΩ
• Automatic temperature correction ensures accurate results & faster testing
• Advanced Connectivity: seamlessly integrate data with Excel® and a mobile app to manage & analyze data efficiently (*Wireless Adapter Z3210 is necessary.)
• Protections for safe operation: halts operation & triggers alerts when incorrect voltage inputs are detected
• Versatile Applications: Ideal for EV, aircraft, & motor/transformer maintenance with various probe options

Basic specifications

Accuracy guaranteed: 1 year

Resistance range	3 mΩ (3.5000 mΩ display Max., 0.1 µΩ resolution) to 3 MΩ range (3.5000 MΩ display Max., 100 Ω resolution), 10 steps Measurement accuracy: ±0.020 % rdg. ±0.007 % f.s.
Testing current	[at 3 mΩ range] 1 A DC to [at 3 MΩ range] 500 nA DC
Open-terminal voltage	5.5 V DC max.
Temperature measurement	-10.0°C to 99.9°C, accuracy: ±0.5°C (Temperature Sensor Z2002 and RM3548-50 combined accuracy)
Measurement speed	Fixed
Display refresh rate	Without OVC: approx. 100 ms With OVC: approx. 230 ms
Functions	Temperature correction, temperature conversion, offset voltage compensation (OVC), comparator (ABS/REF%), length conversion, judgment sound setting, auto hold, auto power save (APS), Averaging, panel store/panel load, USB communication interface (RM3548-50 internal memory is recognized as a mass storage device when connected to a PC), wireless communication via Bluetooth® (Z3210 is necessary)
Memory storage	Number of recordable data points: up to 1000 for manual/auto, up to 6000 for interval Interval: 0.2 s to 10.0 s (0.2 s step) Acquisition of data from memory: display, USB mass storage (CSV, TXT files)
Power supply	LR6 alkaline batteries × 8 HR6 nickel-metal hydride batteries × 8 Continuous use: approx. 10 hours (under our company’s conditions) Rated voltage: 5 VA max.
Dimensions and weight	Approx. 199 mm (7.8 in.) W × 132 mm (5.2 in.) H × 60 mm (2.4 in.) D (including the protector) Approx. 890 g (31.4 oz) (including the batteries and protector)
Included accessories	Clip Type Lead L2107 ×1, Temperature Sensor Z2002 ×1, Protector Z5041 ×1, LR6 alkaline battery ×8, Instruction Manual ×1, USB Cable (A to mini-B) ×1, Strap ×1, Spare fuse ×1