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Cropico DO6 Digital Ohmmeter


Covering a wide range of measurements from 1 micro ohm to 200 kilo ohm, the DO6 is a comprehensive measuring instrument with many features incorporated as standard.

These benefits include manual and automatic range selection; temperature compensation for copper, referencing the measurement of copper to 20°C; voltage limiting facility for those wishing to measure switch contact resistance to International Standards, the measurement voltage is limited to 20mV.

An RS232 serial interface gives full talk / listen capability, making it simple to add to an automated measuring system. Hi / Lo limits may be set over the interface with voltage-free contacts being available on the rear panel.

For those wishing to measure inductive circuits e.g. motor windings, a special protection circuit may be initiated thus avoiding any problems that may arise due to induced high voltage.

Data Sheet

Key Features

  True 4 wire measurement eliminates lead resistance errors
  8 push button ranges 20 milli ohm… 200 kilo ohm
  Resolution of 1 micro ohm on 20 milli ohm range
  Manual / automatic range selection
  Temperature compensation for copper and brass
  Thermal E.M.F. compensation
  Dry circuit measurement: 18mV limited
  Open circuit lead warning
  RS232 interface
  Hi / Lo limits



4 Terminal Kelvin/Thomson, eliminating lead resistance errors


4.5 digit 15mm 7 segment LED with polarity and overload indication. 2 digit 16 segment LED for unit display


8 ranges manual selection with up/down keys, automatic selection with autorange function

Auto Zero

Permits the automatic zero of amplifiers and external circuits

Temperature Compensation

Measurement compensated for the following referenced to 20°C: Copper Cu = 3.93%/K Brass Ms63 = 1.50%/K Brass Ms80 = 1.60%/K Ambient sensed with Pt 100 sensor

Relay Output

For the pre-selected upper and lower limit values "Too small", "Correct", "Too large" Contact load = 30W max 48V 1 Amp

Dry Circuit Measurement

In accordance with DIN 41640 part 4 and IEC - 132-1 Open circuit voltage limited to 18mV


RS232 25 pin D-Bush talk listen function


4mm safety sockets

Working Temperature

0°C to 50°C rel. humidity 90% max. non-condensing

Storage Temperature

-20°C to +60°C

Mains Supply

230 Volts +6% - 10% 45Hz to 65Hz approx. 30VA


IEC 1010 Protective Class 1


255mm x 90mm x 263mm (W D H) approx


5kg approximately

Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.

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