Test & Measurement
High-resolution micro-ohmmeter has increased accuracy
TTi has improved its BS407 micro-ohmmeter by increasing its accuracy at the lowest values of resistance. The BS407 can resolve resistance down to 1 microhm, and has ranges with full scales from 2 milliohms up to 20 kilohms with a basic accuracy of 0.1%. It uses a 4-terminal measurement system via high quality Kelvin clip leads, and has a maximum excitation current of 250 mA. Current reversal can be selected to identify errors from thermal EMF.
A frThe BS407 operates from built-in NiMh rechargeable batteries. Battery operation eliminates the noise that can be created by ground loops on AC line powered equipment. The instrument is fully portable, and has its own battery charger built in.
The instrument is lightweight and compact, measuring 220 x 82 x 230 mm and weighing 1.3 kg.
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