Wide Range 30 mΩ to 3 MΩ DC Resistance Meters with Temperature Correction for High Speed Testing on Production Lines

Hioki DC resistance meters measure a broad range of resistance values at a high level of precision. The RM3544 is easy-to-use resistance testers suitable for use on either manual or automated production lines for measuring the winding resistance of motors and transformers as well as the contact resistance of power relays, switches, and connectors.

How to use Hioki Low Resistance Meters to Measure Coil Resistance

The resistance of copper wires changes based on the temperature. To address this issue, the Hioki RM3544 Resistance Meter measures both temperature and resistance at the same time, and presents the true resistance with its temperature compensation function. With an extremely wide 0.001mΩ to 3.5MΩ measurement range, the RM3544 provides more than enough capabilities to measure solenoids, choke coils, transformers, motors and many other coil components.

Key Features

  • 0.02% basic accuracy, 1 μΩ max. resolution, 300 mA max. measurable current
  • Measure from 0.000 mΩ (testing current 300 mA) to 3.5 MΩ
  • Probe for guard jack use and increased measurement current yield an instrument that’s more resistant to noise
  • Optional LED COMPARATOR ATTACHMENT and high-volume judgment tones combine to ensure PASS/FAIL judgments are communicated reliably in the noisy environment of the production floor
  • EXT I/O interface with NPN/PNP support can accommodate a variety of automated production lines (-01 model)

Model No. (Order Code)

RM3544 No interfaces
RM3544-01 Built in EXT I/O, RS-232C, USB

How to use Hioki Low Resistance Meters: The Comparator Function

The Hioki RM3544 offers the ability to compare the measured value with user-defined upper and lower thresholds, and then displays and outputs the comparative decision.
On top of notifying the user of the results using the on-board LED and audio tones, the decision can also be output via the external input/output terminals to relay controls and PLC systems, making the instrument ideal for production and inspection lines.

Basic specifications

Accuracy guaranteed: 1 year
Resistance range 30 mΩ (35.000 mΩ display max., 1 µΩ resolution) to 3 MΩ range (3.5000 MΩ display max., 100 Ω resolution), 9 steps
Measurement accuracy: ±0.020 % rdg. ±0.007 % f.s.
Testing current [at 30 mΩ range] 300 mA DC to [at 3 MΩ range] 500 nA DC
Open-terminal voltage 5.5 V DC max.
Temperature measurement -10.0 °Cto 99.9°C, accuracy: ±0.5 °C (Temperature Sensor Z2001 and RM3544 combined accuracy)
Measurement speed FAST (50Hz: 21ms, 60Hz: 18ms) / MED (101ms) / SLOW (401ms)
Display refresh rate N/A
Functions Temperature correction, comparator (ABS/REF%), key-lock (OFF, menu lock, all lock), display digit count selection function (5 digits/ 4 digits), automatic power supply frequency settings (AUTO/50Hz/60Hz), scaling, judgment sound setting, auto hold, averaging, panel store/panel load
Memory storage N/A
[Only RM3544-01] Select from RS-232C, Printer (RS-232C), or USB
Remote function, communications monitor function, data output function
Power supply 100 to 240 V AC, 50/60 Hz, Rated power consumption: 15 VA
Dimensions and mass 215 mm (8.46 in) W × 80 mm (3.15 in) H × 166 mm (6.54 in) D
[RM3544] 0.9 kg (31.7 oz), [RM3544-01] 1.0 kg (35.3 oz)
Included accessories [RM3544] Power cord ×1, Clip type lead L2101 ×1, Instruction manual ×1, Spare fuse ×1
[RM3544-01] Power cord ×1, Clip type lead L2101 ×1, Male EXT. I/O connector ×1, Instruction manual ×1, Application disc ×1, USB cable (A-to-B type) ×1, Spare fuse ×1

Measurement Leads / Input scanner (6)

*The L2101 is bundled with the RM3544 series

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

Note: For L2101 to L2104, length “A” can be extended by roughly 1.1 m (3.61 ft) by cutting the binding tube.

PC Communication (1)

*For the RM3544-01