Digital ohmmeter D04A

portablelow-resistancerugged

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 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. 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.