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DO6 ohmmeter

DO6 ohmmeter
 Covering a wide range of measurements from 1 micro ohm to 200 kilo ohm, the DO6 ohmmeter is a comprehensive ohmmeter 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.

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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

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Technical Specification

Measurement

4 Terminal Kelvin/Thomson, eliminating lead resistance errors

Display

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

Ranges

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%/KBrass Ms63 = 1.50%/KBrass Ms80 = 1.60%/KAmbient 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 – 132-1Open circuit voltage limited to 18mV

Interface

RS232 25 pin D-Bush talk listen function

Terminals

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

Safety

IEC 1010 Protective Class 1

Dimensions

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

Mass

5kg approximately

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