RESISTANCE METER

RM3548

High-precision Portable Resistance Meter Measures from µΩ to MΩ

Hioki DC resistance meters measure a broad range of resistance values at a high level of precision. The RM3548 is a high-precision, portable resistance meter capable of measuring resistance levels from microohms to megaohms, and is ideal for the testing and maintenance of large equipment, for example, measuring the winding and weld resistances in large motors and stators for hybrid and electric vehicles. Key Features • 0.02 % basic accuracy, 0.1 μΩ max. resolution, 1A max. testing current • Measure from 0.0 μΩ (testing current 1 A) to 3.5 MΩ • Easily record up to 1,000 data points in memory simply by applying the instrument’s probes • Smoothly capture temperature-rise test data using interval measurement • Portable design is ideal for maintenance and testing of large equipment



Model No. (Order Code)

RM3548

Guarantee3years
USB2
CE

Product Video


Portable resistance tester that’s ideal for low-resistance measurement and testing of large transformers and motors

This resistance tester features a portable design that’s easy to use when performing maintenance work in the field. You can wear the instrument over your neck with the included strap, leaving both hands free to hold the clip-type leads while making measurements. The instrument can be powered by eight AA alkaline batteries for about 10 hours of measurement. (Operating time varies with measurement conditions.)


Reduce the effects of thermoelectromotive force with the offset voltage correction

Thermoelectromotive force refers to the potential difference that occurs at junctions between different metals (see figure). Specifically, the phenomenon occurs where measurement probes and measurement targets come into contact, and at connections between measuring instruments and measurement leads. The magnitude of this thermoelectromotive force varies with the temperature of the measurement environment, increasing as the temperature difference grows. The RM3548 includes an offset voltage correction function that applies the measurement current in both the positive and negative directions and then uses the resulting detected voltages to eliminate the effects of thermoelectromotive force.


Correct resistance values, which vary with temperature, to a reference temperature with the temperature correction function

Temperature correction functions can convert readings to resistance values at a user-specified reference temperature and display the results, even for materials such as copper wire whose resistance varies with temperature. The RM3548’s temperature correction function converts the measured resistance value Rt at the current temperature t to the resistance value Rt0 at the reference temperature t0, as shown in the figure. The Temperature Sensor Z2002 (which comes with the RM3548) is used to perform temperature correction.


Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)

Resistance range3 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 voltage5.5 V DC max.
Temperature measurement-10.0 to 99.9°C, accuracy: ±0.50°C (Temperature Sensor Z2002 and RM3548 combined accuracy)
Measurement speedFixed
Display refresh rateWithout OVC: approx. 100ms, With OVC: approx. 230ms
FunctionsTemperature 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 internal memory is recognized as a mass storage device when connected to a PC)
Memory storageNumber of recordable data points: (manual/auto) Up to 1,000, (interval) Up to 6,000; Interval: 0.2 to 10.0s (0.2s steps); Acquisition of data from memory: display, USB mass storage (CSV, TXT files)
Power supplyLR6 (AA) Alkaline batteries ×8, Continuous use: 10 hours (Under our company’s conditions), Rated power consumption: 5 VA max.
Dimensions and mass192 mm (7.56 in) W × 121 mm (4.76 in) H × 55 mm (2.17 in) D, 770 g (27.2 oz)
AccessoriesClip type lead L2107 ×1, Temperature sensor Z2002 ×1, LR6 Alkaline battery ×8, Instruction manual ×1, USB Cable(A-to-mini B type) ×1, Strap ×1, Spare fuse ×1

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Seminar Videos On Demand

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Seminar Schedule

Registration Open

Energy Plus 2019 - Seoul, Korea

Oct 16, 2019 - Oct 18, 2019

Catalogs

Catalog: RESISTANCE METER RM3544, RM3548 Download PDF  [4MB] English

User Guides

Technical Note: Shunt Resistor Measurement Vol.5 Download PDF  [513KB] English
Technical Note: Wide or Thick Resistor Measurement Vol.4 Download PDF  [4MB] English
Technical Note: Introduction to Resistance Measurement Vol.1 Download PDF  [1MB] English
Technical Note: Resistance Measurement of Busbar Welds Vol.3 Download PDF  [878KB] English

Manuals

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Instruction Manual English
Ver.02
Instruction Manual Simplified Chinese
Ver.02
Instruction Manual Spanish
Ver.01
Instruction Manual German
Ver.01
Instruction Manual French
Ver.01

Outline Drawings

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Ver.01

Technical Notes

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Declaration of Conformity


Ver.03

Drivers, Firmware

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Others

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Options

Measurement Leads

*The L2107, Z2002 are bundled with the RM3548

About lead length
A: From junction to probe, B: Probe length, L: Overall length

Note: For L2107, length “A” can be extended by roughly 0.8 m (2.62 ft) by cutting the binding tube. Length “A” for all other leads cannot be extended.

FOUR TERMINAL LEAD 9453

A:280 mm (11.02 in), B:118 mm (4.65 in), L:1360 mm (4.46 ft), 60V DC

ZERO ADJUSTMENT BOARD 9454

For the L2100, 9465-10, 9465, 9461

PIN TYPE LEAD 9465-10

A: (red) 100 mm (3.94 in), (black) Max. 550 mm (21.65 in), B: 121 mm (4.76 in), L: 1883 mm (6.18 ft)

TIP PIN 9465-90

To replace the tip on the 9465-10, L2020, (one piece)

LARGE CLIP TYPE LEAD 9467

A: 300 mm (11.81 in), B: 131 mm (5.16 in), L: 1310 mm (4.30 ft), tip φ 29 mm (1.14 in), 50 V DC

PIN TYPE LEAD 9772

A: (red) 100 mm (3.94 in), (black) Max. 550 mm (21.65 in), B: 118 mm (4.65 in), L: 1880 mm (6.17 ft)

TIP PIN 9772-90

To replace the tip on the Pin type lead 9772, L2100/L2110, (one piece)

LED COMPARATOR ATTACHMENT L2105

2 m (6.56 ft) length

CLIP TYPE LEAD L2107

A: 130 mm (5.12 in), B:84 mm (3.31 in), L:1.1 m (3.61 ft), 70 V DC

TEMPERATURE SENSOR Z2002

100 mm (3.94 in) length

Case

CARRYING CASE C1006

Gallery

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