HIOKI RM3548-50 Resistance Meter
High-precision Portable Resistance Meter Measures from µΩ to MΩ
OVERVIEW
When Z3210 is installed
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 (*1)
- 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
*1:Wireless Adapter Z3210 is necessary.
Model No. (Order Code)
| RM3548-50 |
Resistance Meter |
Data can be downloaded to tablets and smartphones using Hioki’s dedicated free app "GENNECT Cross," available from the Google Play or App Store. Utilizes templates that simplify data recording and analysis on your mobile device, enhancing overall workflow efficiency.
FEATURES
User-friendly operation
Precision engineering
Adopts the four-wire measurement method and features an offset voltage compensation (OVC) function to ensure high accuracy measurements.
Simple resistance measurement
Enables even beginners to perform resistance measurements without the complexity of multi-functional devices.
Automatic calculations
Temperature correction converts the value of a resistance that depends on temperature, such as that of a copper wire, to a resistance value at a particular temperature to display it.
Wireless communication capability for even greater convenience
Easy! Just connect the optional Z3210 Wireless Adapter to your Hioki compatible instrument, to make it Bluetooth® ready.
Wirelessly connect Hioki-compliant instruments with a simple connection.
Transfer measurements to your smartphone or tablet and quickly create reports with field photos and drawings.
Direct Excel® integration
Boost work efficiency in the field by letting you directly transfer measurement data to (i.e., enter measured values directly into) templates created as Excel®.
The optional Wireless Adapter Z3210 is required.
Versatile probing options
Variety of probes to choose from
A diverse range of probes tailored to meet specific maintenance needs across various applications.
• L2140: Ideal for EV and hybrid car maintenance, the RM3548-50 excels in equipotential bonding tests, battery connection checks, and motor winding inspections. Compliant with UN ECE R100 standards, it offers dedicated probes, straightforward resistance measurements, and a PASS/FAIL function.
• L2141, L2142: Ideal for aircraft maintenance and overhaul, the RM3548-50 performs equipotential bonding tests to check resistance differences in various areas. The L2141 probe, with its rounded tip, is perfect for measuring resistance without damaging the aircraft body, while the L2142 probe’s sharp edge allows for resistance measurement through paint.
Learn more from the Probe Selection Guide
Optimized safety features
Circuit protection
In EV maintenance or battery busbar testing, accidental contact with live voltage can damage a resistance meter. The RM3548-50 features automatic overvoltage protection to prevent this, stopping measurements and safeguarding the circuit from live voltages of up to 60 V DC.
EV maintenance test tool
4 essential test tools for EV high-voltage shutdown and reinitialization
Recommended by leading EV and hybrid manufacturers for reliable and precise maintenance tasks, the RM3548-50 meets the UN ECE R100 international safety standards, which require a minimum measurement current of 0.2 A.
We provide reliable electrical test tools to ensure safe operations for EV maintenance and service personnel.
Click here to learn more!
SPECIFICATIONS
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 |
Malaysia
