RESISTANCE METER
RM3548
from ÂĩÎĐ to MÎĐ
| 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 ideal for the testing and maintenance of large equipment, for example, measuring the winding and weld resistances in large motors and stators for hybrid and electric vehicles. |
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Key Features âĒ 0.02 % basic accuracy, 1 ΞÎĐ max. resolution, 300 mA max. measurable current |
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Product Video |
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Portable resistance tester thatâs ideal for low-resistance measurement and testing of large transformers and motors
This resistance tester features a portable design thatâs 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.) |
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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. |
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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 RM3548âs 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. |
Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)
| Resistance range | 3 mÎĐ (3.5000 mÎĐ display Max., 0.1 ÂĩÎĐ resolution) to 3 MÎĐ range (3.5000 MÎĐ display Max., 100 ÎĐ resolution), 10 steps Measurement accuracy: Âą0.020 % rdg. Âą0.007 % f.s. |
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| Testing current | [at 3 mÎĐ range] 1 A DC to [at 3 MÎĐ range] 500 nA DC |
| Open-terminal voltage | 5.5 V DC max. |
| Temperature measurement | -10.0 to 99.9°C, accuracy: ¹0.50°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), Averaging, panel store/panel load, USB communication interface (RM3548 internal memory is recognized as a mass storage device when connected to a PC) |
| 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) |
| Power supply | LR6 (AA) Alkaline batteries Ã8, Continuous use: 10 hours (Under our companyâs conditions), Rated power consumption: 5 VA max. |
| Dimensions and mass | 192 mm (7.56 in) W Ã 121 mm (4.76 in) H Ã 55 mm (2.17 in) D, 770 g (27.2 oz) |
| Accessories | Clip type lead L2107 Ã1, Temperature sensor Z2002 Ã1, LR6 Alkaline battery Ã8, Instruction manual Ã1, USB Cable(A-to-mini B type) Ã1, Strap Ã1, Spare fuse Ã1 |
| Catalog: RESISTANCE METER RM3544, RM3548 | Download PDFÂ [4MB] | English |
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