RESISTANCE METER

RM3545

Wide Range 10 mΩ to 1000 MΩ DC Resistance Meters with Multiplexer Option for High-speed Multi-point Testing

Overview

Hioki DC resistance meters measure a broad range of resistance values at a high level of precision. The RM3545 is super-high-precision, multichannel-capable resistance meters that meet applications in advanced research and production for testing winding resistance of motors and transformers; contact resistance of power relays, switches, and connectors; and resistance of signal relays and magnetic parts.

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

Resistance range	10 mΩ (12.00000 mΩ display Max., 10 nΩ resolution) to 1000 MΩ range (1200.0 MΩ display Max., 100 kΩ resolution), 12 steps [LP ON] 1000 mΩ (1200.00 mΩ display Max., 10 µΩ resolution) to 1000 Ω range (1200.00 Ω display Max., 10 mΩ resolution), 4 steps Measurement accuracy: ±0.006 % rdg. ±0.001 % f.s.
Testing current	1 A DC to 1 µA or less [LP ON] 1 mA to 5 μA DC
Open-terminal voltage	20 V DC (10 kΩ range or more), 5.5 V DC max. (1000 Ω range or less) [LP ON] 20 mV DC max.
Temperature measurement	-10.0 to 99.9 °C, accuracy: ±0.50 °C (Temperature Sensor Z2001 and RM3545 combined accuracy), -99.9 to 999.9°C (analog input)
Measurement speed	FAST (2.2ms) / MED (50Hz: 21ms, 60Hz: 18ms) / SLOW1 (102ms) / SLOW2 (202ms)
Functions	Temperature correction, temperature conversion, offset voltage compensation (OVC), comparator (ABS/ REF%), BIN, key-lock (OFF, menu lock, all lock), display digit count selection function (7- digit/ 6-digit/ 5-digit), automatic power supply frequency settings (AUTO/ 50Hz/ 60Hz), scaling, judgment sound setting, auto hold, averaging, statistical calculations, panel store/panel load, D/A output.
Multiplexer	[Only RM3545-02] Support Unit: Z3003 (Install up to 2 units)
Communication interfaces	Select from GP-IB (RM3545-01 only), RS-232C, Printer (RS-232C), or USB . Remote function, communications monitor function, data output function, memory (50)
Power supply	100 to 240 V AC, 50/60 Hz, Rated power consumption: 40 VA
Dimensions and mass	215 mm (8.46 in) W × 80 mm (3.15 in) H × 306.5 mm (12.07 in) D [RM3545/RM3545-01] 2.5 kg (88.2 oz), [RM3545-02] 3.2 kg (35.3 oz)
Accessories	Power cord ×1, Clip type lead L2101 ×1, temperature sensor Z2001 ×1, Male EXT. I/O connector ×1, Instruction manual ×1, Application disc ×1, USB cable (A-to-B type) ×1, Spare fuse ×1

How to Use Resistance Meters: Measuring Contact Resistance with the Low Power Resistance Function

IEC standards define the method by which to measure the contact resistance of connectors and relays used for very low signals. The Hioki RM3545 Resistance Meter meets those standards with its low power resistance function, also known as the dry circuit test. To reduce the effects on any deteriorating contact surface, the open terminal voltage is capped at 20mV, while the maximum measurement current never exceeds 1mA, delivering the ideal testing environment for measuring contact resistance from the 0.1μΩ to 1kΩ range.

How to Use Resistance Meters: Compensating for the Effect of Electromagnetic Force

When measuring low resistance, due to the voltage generated when different metals come into contact with one another (known as electromagnetic force, or EMF), the measurement values can be unstable. The Hioki RM3545 is built in with an Offset Voltage Compensation (OVC) function to correct for the effects of EMF, making the instrument ideal for measuring low resistance of the welding points of busbars.

Product Video

Key Features • 0.006% basic accuracy, 0.01 μΩ max. resolution, 1A max. testing current • Measure from 0.00 μΩ (testing current 1 A) to 1200 MΩ • Multiplexer Unit Z3003 (option) provides 20-channels of 4-terminal measurements for a complete assessment of multi-point signals (RM3545-02 only) • Low-power resistance measurement with an open voltage not exceeding 20 mV • High-speed, comprehensive productivity support delivers decisions in as little as 2.2 ms from start to finish