14
Micro-Ohmmeter Model 6250
CHAPTER 3
SPECIFICATIONS
3.1 Electrical
Specications are given for an ambient temperature of 23°C ± 5°, relative humidity
of 45 to 75% and a supply voltage of 6V ± 0.1V.
Measurement Method:
4-Wire Kelvin resistance measurement with compensation for stray/resid-
ual voltages
Measurement Ranges:
Range Resolution
Accuracy over 1 year
23°C ± 5°C
Measurement
Current
Voltage
Drop
5mΩ 0.1µΩ 0.15% ± 1.0µΩ 10A 50mV
25mΩ 1µΩ 0.05% ± 3µΩ 10A 250mV
250mΩ 10µΩ 0.05% ± 30µΩ 10A 2500mV
2500mΩ 0.1mΩ 0.05% ± 0.3mΩ 1A 2500mV
25Ω 1mΩ 0.05% ± 3mΩ 100mA 2500mV
250Ω 10mΩ 0.05% ± 30mΩ 10mA 2500mV
2500Ω 100mΩ 0.05% ± 300mΩ 1mA 2500mV
Temperature Measurement: 3-wire 100Ω Platinum RTD
Accuracy: ± 0.5°C
Resolution: 0.1°C
Inuence From Environment Conditions:
Temperature: 0.1% per 10°C typical, 0.25% max
Humidity: 0.5% max from 10 to 90%
Battery Voltage: ± 0.1% from 4.5 to 7.5V
Open Circuit Voltage: 7VDC max
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