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Chapter 3 Specifications
General
The specifications for the 4100 Series of Ohmmeters are listed in the following paragraphs. In all
cases the specifications are valid for full Kelvin Four-Terminal measurements using connections
having less than 20 milliohms of lead resistance per wire.
Accuracy
The accuracy specifications listed below are valid following a 30 minute warm-up at an ambient
temperature between 15°C and 35°C for a period of 1 year following calibration, and include the
effects of line voltage variations within the allowed range.
Model 4100ATC
Range Maximum Input Resolution Test Current Accuracy
.2Ω .19999 Ω 10µΩ 1 A ±0.02% of rdg ±2 digits
2Ω 1.9999 Ω 100µΩ 100 mA ±0.02% of rdg ±2 digits
20Ω 19.999 Ω 1mΩ 10 mA ±0.02% of rdg ±2 digits
200Ω 199.99 Ω 10mΩ 1 mA ±0.02% of rdg ±2 digits
2kΩ 1.9999 kΩ 100mΩ 100 µA ±0.02% of rdg ±2 digits
20kΩ 19.999 kΩ 1Ω 10 µA ±0.02% of rdg ±2 digits
Full Scale Test Voltage: 200mV
Model 4150ATC
Range Maximum Input Resolution Test Current Accuracy
20mΩ 19.999 mΩ 1µΩ 1 A ±0.03% of rdg ±3 digits
200mΩ 199.99 mΩ 10µΩ 100 mA ±0.03% of rdg ±3 digits
2Ω 1.9999 Ω 100µΩ 10 mA ±0.03% of rdg ±3 digits
20Ω 19.999 Ω 1mΩ 1 mA ±0.03% of rdg ±3 digits
200Ω 199.99 Ω 10mΩ 100 µA ±0.03% of rdg ±3 digits
2KΩ 1.9999 kΩ 100mΩ 10µA ±0.03% of rdg ±3 digits
Full Scale Test Voltage: 20mV
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