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The DO4002 digital microhmmeter offers true portability without any sacrifice to accuracy or functionality. This micro ohmmeter is a ruggedly constructed instrument is housed in a stylish plastic case with easy to use keyboard. The measured values are displayed on a large LCD screen which allows for ease of viewing. Automatic or manual range selection is available and many advanced features are included.

Cropico DO4002

Technical specification

Measurement	4 Terminal Kelvin/Thomson principle eliminates error due to lead resistance. Open circuit measurement voltage approx. 5V dc.
Display	15mm LCD 4,000 count with automatic decimal point and polarity indication
Ranges	6 Ranges with automatic or manual selection
Auto Zero	Permits the automatic zero of amplifiers and external circuits eliminating errors due to thermal emf.
Calibration	Digital
Protection	415 rms maximum at input terminals
Battery	5 AA size manganese Alkaline supplied with unit. Rechargeable battery pack option includes 5 AA size Ni/Mhd, housed in removable cassette plus docking station and charger. Automatic Power OFF ensures maximum battery life
Temperature Compensation	The model 4002 also includes temperature compensation which references the measurement to an ambient temperature of 20 Deg.C. Coefficients for copper and aluminium are pre programmed and a user coefficient facility enables coefficients for any material to be entered.
Temperature Measurement	The Model 4002 also include temperature measurement over the range -50...+800 Deg C. Using a Pt100 temperature probe which may be ordered as an option.
Terminals	4mm safety sockets
Working Temperature	0...40°C rel. humidity 80% max. non-condensing
Storage Temperature	-20 ... +50°C.
Charger Mains Supply	100/120/220/240 Volts +10% -13%. 47 ... 63Hz. 20VA
Safety	EN61010-1 EMC - EN61326
Dimensions	215 x 130 x55mm （W H D）
Weight	0.8kg
Accessories	Supplied complete batteries, measuring leads with Kelvin Clips, handbook, and calibration certificate

Resistance ranges

Range	Resolution	Typical Current	Uncertainly @ 20°C ±5°C, 1 year	Temperature Coefficient / °C
400ohm	100 mohm	1mA	±（0.05% Rdg + 0.02% FS）	30 ppm Rdg + 1 ppm FS
40ohm	10 mohm	1mA	±（0.05% Rdg + 0.02% FS）	30 ppm Rdg + 1 ppm FS
4ohm	1 mohm	100 mA	±（0.05% Rdg + 0.02% FS）	30 ppm Rdg + 1 ppm FS
400mohm	100 µohm	1A	±（0.05% Rdg + 0.03% FS）	30 ppm Rdg + 4 ppm FS
40mohm	10 µohm	1A	±（0.05% Rdg + 0.05% FS）	30 ppm Rdg + 25 ppm FS
4mohm	1 µohm	1A	±（0.05% Rdg + 0.01% FS）	30 ppm Rdg + 25 ppm FS