Seaward Cropico DO7PLUS Rugged portable digital micro ohmmeter with temperature compensation

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Data Sheet


The DO7Plus is a 10A micro ohmmeter, suitable for applications within aerospace, utilities, cable or machine manufacturers or where a cooling curve is required to plot peak resistance. Sealed in an IP67 case (when closed or IP53, lid open) it is ruggedly constructed to ensure durability.

This micro ohmmeter has a display length of 60,000 counts and auto averaging of forward and reverse measurement removes thermal emf differences.

The DO7Plus micro ohmmeter has built in rechargeable batteries which will provide up to 1 hour of continuous use at 10A, and up to 20 hours at all other ranges.

Technical Specifications

Technical specification
Measurement 4 terminal Kelvin / Thompson principle eliminates errors due to lead resistance
Display 60,000 count + sign LCD graphics panel with backlight select display value of °C or °F
Ranges 7 resistance ranges
Terminals 4mm safety sockets
Working temperature 0 deg C to 40 deg C
Storage Temperature -20 deg C to +50 deg C
Safety EN 61010-1
Dimensions and weight 358mm X 269mm X 155mm
Mass <5Kg (instrument only)
Calibration Digital Password protected, manual or via remote interface
Battery Internal, fixed NiMh battery pack, Gas Gauge circuits to monitor battery capacity. Internal automatic FAST / TRICKLE battery charger. DC input from 9V to 36V.
Mains supply External mains psu 90V – 253V, 47Hz to 63Hz with interchangeable plugs