DO4A Ohmmeter
930127

Cropico DO4A

Portable digital ohmmeter with 415V protection

- 10 micro ohm resolution on 40 milli ohm range
- Input protection up to 415 Volts rms
- 6 push button ranges 40 milli ohm... 4 kilo ohm with long scale length


DO4A

This portable digital ohmmeter is a practical instrument for low resistance measurement, ideal for use in the workshop, field or test facilities. It is of rugged construction contained in an aluminium case with tilt handle.

The DO4A has many advanced features, including protection up to 415 volts rms, digital calibration and long scale length, 4,000 count. The rechargeable sealed lead acid battery means real portability with more than 14 hours continuous operation, without the problems normally associated with other battery types. Full measurement capability is maintained whilst charging.


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Technical Specifications

Technical specification
Measurement4 Terminal Kelvin/Thomson principle eliminates error due to lead resistance. Open circuit measurement voltage approx. 5V dc.
Display15mm LCD 4,000 count with automatic decimal point and polarity indication.
Ranges6 Push button selected with LED indication
Auto ZeroPermits the automatic zero of amplifiers and external circuits eliminating errors due to thermal emf.
CalibrationDigital, security key protected
Protection415 rms maximum at input terminals
Battery6 Volt 2.8 Ah sealed lead acid, replaceable. Operating Time: 14 hours typical on bottom range, 28 hours typical on other ranges. Internal charger with automatic switch-off to prevent deep discharge.
Executive Lead PackThis lead pack consists of four test leads, 1 metre long, with 4mm banana plugs, 4 crocodile clips, 4 test prods and 2 Kelvin Clips (combined current and potential clips).
Terminals4mm safety sockets
Working Temp0...40°C rel. humidity 80% max. non-condensing
Storage Temp-20 ... +50°C
Mains Supply100/120/220/240 Volts +10% -13%. 47 ... 63Hz. 20VA
SafetyIEC 348 Protective Class 1
Dimensions215 x 250 x 88mm (W D H): 1/2 19" rack. 2U high (467 x 374 x 216mm packed in card carton)
Mass3.5kg (4.5kg packed in card carton)
AccessoriesSupplied complete with mains cord, measuring leads with Kelvin Clips, handbook and certificate of conformity

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