The Model R1L-E2A from TEGAM Inc., Geneva, OH, is an intrinsically safe ground bond meter that provides accurate low-resistance measurements. The device has 5 measurement ranges with F.S. values from 2 milliohms to 20 ohms with 1 µohm resolution on the lowest range. Accuracy is 0.1% of reading ±2 counts and operating temperature range is –20°C to 50°C. Standard pistol-grip probes make 4-wire Kelvin measurements. Applications include aircraft bond measurements in manufacturing and flight-line maintenance operations, verifying natural gas pipe grounds and bonds, checking pharmaceutical equipment grounds and storage facilities in the presence of alcohol, and inspecting lightning arrestors in petrochemical production and distribution facilities.
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