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Hioki RM3548 Portable DC Resistance Meter

Name: Hioki RM3548 Portable DC Resistance Meter
Brand: Hioki
SKU: HiokiRM3548
Price: 1512.00 USD
Availability: InStock
Rating: 4.89 (9 reviews)

5 (9 Reviews) | Model: Hioki RM3548

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Resistance Meter. High-precision Portable Resistance Meter Measures from u to M

0.02 % basic accuracy, 0.1 μΩ max. resolution, 1 A max. testing current, 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

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Price
In Stock
Style (Milli-Ohmmeter)	Portable	Bench	Bench	Portable
Line Power or Battery power	Battery Power	Line Power	Line Power	Battery Power
Minimum Resistance	3 m Ohms (0.003 Ohms)	3 m Ohms (0.003 Ohms)	3 m Ohms (0.003 Ohms)	3 Ohms
Compare	Add to compare	Add to compare	Add to compare	Add to compare

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Hioki RM3548 - Portable DC Resistance Meter (3mΩ to 3MΩ)

High-precision specs in a portable package (high accuracy of 0.02% rdg.)
Design is ideal for maintenance and testing/measurement of large equipment
No warmup period or zero adjustment required
Dramatically improved overvoltage resistance (protection up to 70 V DC)

High-Accuracy Portable Resistance Meter

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 intended primarily for use in testing and maintenance of large equipment, for example, measuring the winding and weld resistances in large motors.

High-precision specs in a portable package

Continuity and resistance measurement in large transformers, motors, and power supply equipment

The RM3548 uses a high current of 1 A to measure lower resistance values more reliably at a resolution of 0.1 μΩ in applications including measuring resistance in large transformers and motors as well as wiring, busbars and connections in power supply equipment.

Verification of continuity of ground lines in automobiles and fuselage welds and caulking in aircraft

The RM3548 can be used to check ground connections* in automobiles and fuselage welds and caulking in air- craft using a measurement current of 300 mA (300 mΩ range).

Expansive range options

Measure from 0.0 μΩ to 3.5000 MΩ
0.1μΩ max. resolution, 0.02% basic accuracy
Max. measurable current of 1A

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.)

Auto-hold and auto-memory functionality

The RM3548 features auto-hold and auto-memory functionality to automatically hold and record data simply by placing the probes in contact with the desired measurement location. This functionality allows measured values to be recorded automatically as soon as they stabilize without the need for the user to operate any switches.

LED Comparator Attachment

By installing the LED Comparator Attachment close to a probe, you can capture judgment results without moving your eyes away from the measurement location and probe.

Offset Voltage Compensation (OVC)

Thermal EMF occurs at the contact point of different metals. This voltage affects measurements, and if large enough, can cause measurement errors. The offset voltage compensation function minimizes the effect of thermal EMF to maintain measurement accuracy. Particularly when measuring low resistances where the detection voltage is small, and during low-power resistance measurements, OVC is essential to maintain accuracy.

Length conversion function

By setting a resistance value per meter, it is possible to convert resistance values into lengths. This capability is useful when managing cable inventory or estimating PCB pattern lengths.

No zero adjustment

Accuracy is defined without any need to perform zero-adjustment. Measurement can be performed as soon as the instrument is turned on.

Dramatically improved over-voltage resistance

Protection is provided against over-voltage input of up to 70 V, preventing damage caused by connecting the instrument to an electrical charge or by the effects of the counter-EMF from inductance.

Acquire measured values recorded in the instrument’s memory over a USB connection

By connecting the RM3548 to a computer with a USB cable, you can download measured values stored in the instrument’s memory. Since the RM3548 provides a mass storage class (read-only) USB interface, there is no need to install special driver software on the computer

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.

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 to 99.9°C, accuracy: ±0.50°C (Temperature Sensor Z2002 and RM3548 combined accuracy)
Measurement speed	Fixed
Display refresh rate	Without OVC: approx. 100ms, With OVC: approx. 230ms
Functions	Temperature correction, temperature conversion, offset voltage compensation (OVC), comparator (ABS/REF%), length conversion, judgment sound setting, auto hold, auto power save (APS)
Memory storage	Number 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)
Other functions	Averaging, panel store/panel load, USB communication interface (RM3548 internal memory is recognized as a mass storage device when connected to a PC.)
Power supply	LR6 (AA) Alkaline batteries x8, Continuous use: 10 hours (Under our company's conditions), Rated power consumption: 5 VA
Dimensions, mass	192 mm (7.56 in) W x 121 mm (4.76 in) H x 55 mm (2.17 in) D mm, 770 g (27.2 oz)
Supplied accessories	Clip type lead 9287-10 x1, Temperature sensor Z2002 x1, LR6 Alkaline battery x8, Instruction manual x1, USB Cable(A-to-mini B type) x1, Strap x1, Extra fuse x1

Tech Specs

Micro / Milli / Meg Ohmmeters/Milli-Ohmmeter Template
Style (Milli-Ohmmeter)	Portable
Line Power or Battery power	Battery Power
Minimum Resistance	3 m Ohms (0.003 Ohms)
Maximum Resistance	3 M Ohms (3000000 Ohms)
Max Resolution (Ohms)	0.1 u Ohms (0.0000001 Ohms)
Variable Test Current	No
Maximum Current	1 A
Minimum Current	500 nA (0.5 uA)
Selectable Ranges	Yes
Alarm	No
Comparator Function	Yes
Digits Display	5
Kelvin Four-Terminal Measurement	Yes
Test Equipment General Attributes
Warranty	1 YEARS
Interfaces I/O	USB
Product Weight	27.2 OUNCES (1.7 LBS)
Product Height	55 MM (2.17 IN)
Product Length	121 MM (4.76 IN)
Product Width	192 MM (7.56 IN)
Data Logging	Yes
Calibration Included	None
Battery Type	AA
Power Supply Voltage	Battery Powered
Country of Origin	Japan

5

Out of 5

Average Customer Review

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Displaying all 9 reviews

Most Helpful First | Newest First

Recommend to a Friend

Tools you can count on!

5.0

Very accurate, great screen, compact and intuitive use, couldn't ask for more.

on Mar 06, 2023

Recommend to a Friend

Excellent product

5.0

Compact but large display, portable, top quality product. Recommend buying the Hioki 9465-10 leads for measurements of points much further away from each other.

Verified Purchase Bruce Touzel on Apr 29, 2022

Recommend to a Friend

TEquipment rocks

5.0

We needed to get an accurate micro-Ohmmeter in a short lead time. As always, TEquipment had the desired tool in stock at a great price point and we had it in hand within a few days. Excellent Service, folks!

Great tool, great support rom TEquipment on Apr 26, 2022

Recommend to a Friend

Accurate and Easy to Use

5.0

Amazing accuracy compared to even a high quality precision mutlimeter. Easy to use and seems well made. I recommend getting the case as well for field use.

on Oct 25, 2021

Recommend to a Friend

Hioki RM3548

5.0

I purchased RM3548 to use it in medical devices design, confirming and calibrating special connection resistance. It is incredibly useful, reliable and accurate.

Very Reliable on Jul 19, 2021

Recommend to a Friend

Accurate!!!

5.0

I purchased this meter to be able to properly test 3 phase electric motors on hybrid vehicles. I works fantastic. Very accurate.

Verified Purchase Jesse Weston on Feb 16, 2021

Recommend to a Friend

Good unit and Price

5.0

This unit was one of the most cost effective for a low Ohm reading meter. I was concerned about the accuracy and quality, but after using it, it works just fine. I needed to measure less than .5 miliohm, and it works nicely. I’ve used it many times now, and I would buy it again.

Sandy on Apr 21, 2019

Recommend to a Friend

Worked perfect!

5.0

My service department supported a training session last week for a new line of generators, and it performed beyond expectations. Our training department will be placing an order for the second unit this week. Note: purchase the recommended case that is available from TEquipment.net (pn C1006)

Billy on May 15, 2017

Recommend to a Friend

Hioki Review

4.0

Product came in a timely manner.
Quality product.

Verified Purchase Anonymous on Dec 15, 2014

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Hioki RM3548 Portable DC Resistance Meter

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Hioki RM3548 - Portable DC Resistance Meter (3mΩ to 3MΩ)

Tech Specs

Micro / Milli / Meg Ohmmeters/Milli-Ohmmeter Template

Test Equipment General Attributes

5

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