Cropico DO7e Rugged Portable Digital Ohmmeter
DO7e
The DO7e is a practical low cost instrument for low resistance measurement, ideal for use in the workshop, field or test facilities. It is of rugged construction, contained in a sealed ABS plastic case with lid and carrying handle.
The DO7e has many advanced features, including protection up to 415 volts rms at the measuring terminals, digital calibration and long scale length, 6000 count. The measuring ranges may be automatically or manually selected. Rechargeable batteries means real portability with more than 1 hour of continuous operation on the lowest ranges, and 20 hours on all others. 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. Warning LEDs illuminate when an open circuit lead condition is detected.
The DO7e is supplied ready for use with batteries, mains cord and test leads, no extras are normally necessary. For special lead sets we offer a variety of different styles which are listed on the accessories page, together with calibration standards.
Key Features
-
True 4 wire measurement eliminates lead resistance
-
6 push button ranges 60 milliohms to 600 ohms
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Resolution 1 microhm on 60 milliohm range
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Auto ranging
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10 Amp measuring current on lowest range
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0.8'' LED Display daylight viewable
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Input protection up to 415 Volts rms
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forward and reverse current measurement
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Auto average of forward and reverse measurement
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Auto power off
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Mains / rechargeable battery operation
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Digital calibration pass code protected
Downloads
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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 152 mm (W D H) approx. |
| Mass |
13.3 lbs. (6 kg 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 |
|
600 Ohm |
100 mOhm |
1 mA |
±(0.25% Rdg +0.05% FS) |
40 ppm Rdg + 30 ppm FS |
|
60 Ohm |
10 mOhm |
10 mA |
±(0.25% Rdg +0.05% FS) |
40 ppm Rdg + 30 ppm FS |
|
6 Ohm |
1 mOhm |
100 mA |
±(0.25% Rdg +0.05% FS) |
40 ppm Rdg + 30 ppm FS |
|
600 mOhm |
100 mOhm |
1 A |
±(0.25% Rdg +0.05% FS) |
40 ppm Rdg + 30 ppm FS |
|
60 mOhm |
10 mOhm |
1 A |
±(0.25% Rdg +0.1% FS) |
40 ppm Rdg + 30 ppm FS |
|
6 mOhm |
1 mOhm |
10 A |
±(0.25% Rdg +0.2% FS) |
40 ppm Rdg + 250 ppm FS | |
|
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