Resistance Meter for Ultra-low and Low Shunt Resistance
Hioki DC resistance meters measure a broad range of resistance values at a high level of precision. The RM3543 is designed to be integrated into current sensing resistor taping machines, deliver high-accuracy measurement of super-low-resistance levels, and are advanced enough to measure 0.1 mΩ shunts with room to spare.
| RM3543 | |
|---|---|
| RM3543-01 | Built in GP-IB interface |
The Resistance Meter RM3543 can measure low shunt resistance values and other DC resistance values at a high accuracy of ±0.16% for 0.1 mΩ and at the high resolution* of 0.01 μΩ.
*In the 10 mΩ range, at SLOW measurement speed, and with 16 averaging iterations.
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 RM3543 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.
The RM3543’s scaling function can correct for the difference in resistance values that are obtained when testing a given component alone and when it is mounted on a circuit board (due to the factors such as the effects of probing position). This feature is useful when testing low-resistance current-sensing resistors such as shunts.
The RM3543 improves contact with measurement specimens by eliminating oxide films and dirt between the probes and specimens. By addressing faulty contact, the instrument facilitates stable measurement and reduces the contact error rate, boosting productivity.
The presence of any foreign material between the POT and CUR measurement probes can interfere with reliable 4-terminal connections. The RM3543 checks for probe short-circuits by measuring the resistance value between POT and CUR while measurement is not being performed.
| Measurement method | Four-terminal, constant-current DC | |||||
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| Resistance range | 10 mΩ (Max. 12.00000 mΩ, 0.01 μΩ resolution) to 1000 Ω range (Max. 1200.000 Ω, 1 mΩ resolution), 7 steps | |||||
| Display | Monochrome graphic LCD 240 × 64 dot, white LED backlight | |||||
| Measurement accuracy | [at 10 mΩ range, with SLOW mode, average 16 times settings] ±0.060 % rdg. ±0.001 % f.s. |
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| Testing current | [at 10 mΩ range] 1 A DC to [at 1000 Ω range] 1 mA DC | |||||
| Open-terminal voltage | 20 V DC max. Note: Voltage when not measuring is 20 mV or less, with current mode set at PULSE and Contact Improver Setting set at OFF/PULSE (measured with a voltmeter having 10 MΩ) | |||||
| Sampling rate | FAST, MEDIUM, SLOW, 3 settings | |||||
| Integration time | [at 10 mΩ range, default value] FAST 2.0 ms, MED 5.0 ms, SLOW 1 PLC, Setting range: 0.1 ms to 100.0 ms, or 1 to 5 PLC at 50 Hz, 1 to 6 PLC at 60 Hz Note: PLC = one power line cycle (mains wave-form period) |
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| Other functions | Comparator (compare setting value with measurement value), Delay, OVC (offset voltage compensation), Average, Measurement fault detection, Probe short-circuit detection, Improve contact, Current mode setting (A pulse application function that applies current only during measurement), Auto-memory, Statistical calculations, Settings monitor (when using two instruments, a difference in settings causes warning notification), Retry, Trigger function. etc,. | |||||
| Interfaces | External I/O, RS-232C, Printer, GP-IB (Model RM3543-01) | |||||
| External I/O | Trigger, Hold input, Comparator output, Settings monitor terminal, Service power output +5V, +12V, etc. | |||||
| Power supply | 100 to 240 V AC, 50/60 Hz, 40 VA max. | |||||
| Dimensions and mass | 260 mm (10.24 in) W × 88 mm (3.46 in) H × 300 mm (11.81 in) D, 3.0 kg (105.8 oz) | |||||
| Included accessories | Power cord ×1, EXT. I/O male connector ×1, Instruction manual ×1, Operation guide ×1 | |||||
