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詳細介紹
The DO7e is a practical low cost micro ohmmeter for low resistance measurement, ideal for utilities in the workshop, field or test facilities. This micro ohmmeter is of rugged construction, contained in a sealed ABS plastic case with lid and carrying handle.
The DO7e microhmmeter has many advanced features, including protection up to 415 volts rms at the measuring terminals, digital calibration and long scale length, 6,000 count. The measuring ranges may be automatically or manually selected.
Automatic Power Off ensures maximum battery life. The internal charger will boost charge to 90% of full charge, switching automatically to a trickle maintenance charge
Cropico DO7e
Technical specification
| Measurement | 4 Terminal Kelvin/Thomson principle eliminates error due to lead resistance. Open circuit measurement voltage~5V dc |
| Display | 0.8" LED 6000 count with automatic decimal point and polarity indication |
| Ranges | 6 push button or auto selected with LED indication |
| Calibration | Digital, security code protected |
| Protection | 415 rms maximum at input terminals |
| Battery | Sealed lead acid, rechargeable cell gives a minimum of 1 hour of continuous measurement on the lowest 10 amp ranges and 20 hours on all other ranges. Internal charger with battery state indicator |
| Terminals | 6mm binding posts accept spade tags and 4mm banana plugs |
| Working Temp | 0...40°C rel. humidity 80% max. non-condensing |
| Storage Temp | -20...+50°C |
| Mains Supply | 10/230 Volts +10% -10% 47Þ63Hz 20VA |
| Safety | EN 61010-1 |
| EMC | Complies with EN61326 |
| Dimensions | 343 x 327 x 152mm （W D H） approx |
| Mass | 6kg approx |
| Accessories | Supplied complete with mains cord, measuring leads with Kelvin Clips, handbook, and calibration certificate |
Resistance ranges
| Range | Resolution | Typical Current | Accuracy @ 20°C ±5°C, 1 year | Temperature Coefficient / °C |
| 600Ohm | 100mOhm | 1mA | ±（0.25% Rdg +0.05% FS） | 40 ppm Rdg + 30 ppm FS |
| 60Ohm | 10mOhm | 10mA | ±（0.25% Rdg +0.05% FS） | 40 ppm Rdg + 30 ppm FS |