Hioki RM3545A Resistance Meter

New Heights in 100% Inspection

Market leading precision tests for testing every weld or connection on your production line

As electric mobility gains popularity, manufacturers are developing components for higher currents and voltages. Since even minuscule amounts of resistance can have a significant impact on energy efficiency and safety, more accurate quality control focusing on resistance is required.

The Resistance Meter RM3545A facilitates accurate resistance measurements and is suitable for diverse applications in development and production lines.

Key Features

  • 0.045% basic accuracy, 1 nΩ max. resolution, 1A max. testing current
  • Measure from 1 nΩ (testing current 1 A) to 1200 MΩ
  • Equipped with advanced features, ensuring precise resistance measurement (OVC, temperature measurement, and correction function)
  • High path resistance tolerance allows seamless integration into an automatic test system, eliminating concerns about wiring or contact resistance
  • Advanced contact-check, comparator function, control, and communications features
  • The RM3545A-2 can be equipped with up to two optional Z3003 Multiplexer Units, allowing it to measure up to 20 channels (using the 4-terminal method)

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Hioki RM3545A Resistance Meter

Measure low resistance values at high precision and high, 1 nΩ resolution

Electric resistance is measured by passing a current through a measurement target such as a weld. Pass and fail judgments are generated based on variation in resistance values.

A typical low-resistance weld can have resistance ranging from 10 μΩ to 100 μΩ. The Resistance Meter RM3545A provides a 1000 μΩ range and 1 nΩ resolution, allowing it to measure low resistance values with a high degree of precision.

If a weld is insufficient, its resistance value will exceed that of a non-defective weld. Pass and fail results are generated for non-defective and defective welds based on minuscule differences in their resistance values. Weld quality can be managed quantitatively for all welds passing through a production line, ensuring traceability.

 

Model No. (Order Code)

RM3545A-1 Single-channel model
RM3545A-2 Support for the multiplexer unit

Specification

Basic specifications

Accuracy guaranteed: 1 year
Resistance range (13 ranges) [Range, Maximum display value, Resolutions, Testing current (Measurement current) ] 1000 μΩ: 1200.000 μΩ, 1 nΩ, 1 A
10 mΩ: 12.000 00 mΩ, 10 nΩ, 1 A
100 mΩ: 120.000 0 mΩ, 100 nΩ, 1 A
1000 mΩ: 1200.000 mΩ, 1 μΩ, 100 mA
10 Ω: 12.000 00 Ω, 10 μΩ, 10 mA
100 Ω: 120.000 0 Ω, 100 μΩ, 10 mA
1000 Ω: 1200.000 Ω, 1 mΩ, 1 mA
10 kΩ: 12.000 00 kΩ, 10 mΩ, 1 mA
100 kΩ: 120.000 0 kΩ, 100 mΩ, 100 μA
1000 kΩ: 1200.000 kΩ, 1 Ω, 10 μA
10 MΩ 12.000 00 MΩ, 10 Ω, 1 μA
100 MΩ (100 MΩ range high-precision mode): 120.000 0 MΩ, 100 Ω, 100 nA
1000 MΩ: 1200.0 MΩ, 100 kΩ, 1 μA or less
Representative accuracy (High mode, OVC function enabled, SLOW2, no zero adjustment) 1000 μΩ range: ±0.045% rdg ±0.010 % f.s.
10 mΩ range: ±0.045% rdg ±0.001 % f.s.
100 mΩ range: ±0.045% rdg ±0.001 % f.s.
1000 mΩ range: ±0.012% rdg ±0.001 % f.s.
1000 Ω range: ±0.006% rdg ±0.001 % f.s.
Testing current (Measurement current) High mode: 1000μΩ (1 A) to 1000 MΩ (up to 1 μA)
Low mode: 100 mΩ (100 mA) to 100 Ω (1 mA)
Low power mode (LP): Low power measurement with measurement current and open circuit voltage down to 20 mV
LP1000 mΩ (1 mA) to LP1000 Ω (5 μA)
Measurement speed Representative value: FAST (2.3 ms) / MED (50 Hz: 22 ms, 60 Hz: 19 ms) / SLOW1 (102 ms) / SLOW2 (202 ms)
PR10 mΩ range*: FAST (21 ms) / MED (50 Hz: 41 ms, 60 Hz: 37 ms) / SLOW1 (121 ms) / SLOW2 (221 ms)
Path resistance tolerance (reference values)
Path resistance between SOURCE B and SOURCE A (other than measurement target)		 Range: 100 mΩ or less (PR* mode off) : 2.6 Ω
Range: 100 mΩ or less (PR* mode on) : 3.5 Ω
Range: 1000 mΩ: 15 Ω
Range: 10 Ω : 150 Ω
Range: 100 Ω : 100 Ω
Range: 10 kΩ : 500 Ω
Range: 100 kΩ or greater: 1 kΩ
Maximum open-terminal voltage Range: 1000 Ω or less: 8.0 V
Range: 10 kΩ or greater: 20 V
Temperature measurement Temperature Sensor (Z2001[included accessories]): -10.0℃ to 99.9℃
Analog input (Ex: Infrared thermometer): DC 0 V to 2.0 V
Multiplexer (built-in option)*
*RM3545A-2 only		 Multiplexer unit Z3003
Number of installable units：Max. 2
Maximum number of channels : 20 channels (4-wire method), 42 channels (2-wire method)
Switching time : 30 ms
Multiplexer (external option) Switch Mainframe
Maximum number of channels (SW1001): 33 channels (4-wire method)
Maximum number of channels (SW1002): 132 channels (4-wire method)
Switching time：11 ms
Communication interfaces LAN (TCP/IP, 10BASE-T/100BASE-TX), RS-232C (Max. 115200 bps, also used as printer interface), USB, EXT I/O (D-sub 37-pin, Analog output (D/A output voltage range: DC 0 V to 1.5 V )
Functions Contact check, Zero adjustment (within each range ±50% f.s.) *1, Zero-adjustment-free accuracy guaranteed, OVC function, Contact improvement function (max. applied voltage: 5V; max. applied current: 10 mA), Low-power mode (maximum open voltage: 20 mV), Auto-hold function, Comparator, Temperature measurement function, Temperature correction (TC) function, Temperature conversion (ΔT) function, Statistical calculation function, Delay function, Averaging function, Saving panels (saving of measurement conditions), Data memory function, Command monitor function (display of send/receive status of commands and queries),LabVIEW® Driver compatible*2
*1: Zero adjustment forcibly disabled for 100 MΩ or greater
*2: LabVIEW Driver is the trademark or registered trademark of National Instruments.
Power supply 100 V to 240 V AC, 50 Hz/60 Hz, Rated power consumption: 40 VA max.
Normal power consumption (Reference value) 16 W (Testting current 1 A, LCD on)
Dimensions and mass RM3545A-1: 215 mm (8.46 in) W × 80 mm (3.15 in) H × 306.5 mm (12.07 in) D, 2.7 kg (95.2 oz)
RM3545A-2: 215 mm (8.46 in) W × 80 mm (3.15 in) H × 306.5 mm (12.07 in) D, 3.4 kg (119.9 oz)
Included accessories Power cord ×1, Temperature sensor Z2001 ×1, Male EXT I/O connector ×1, EXT. I/O connector cover ×1, Spare fuse (F1.6AH 250 V)×1, Start up guide ×1, Operating Precautions ×1, Instruction manual ×1

*PR: Pure Resistance

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