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Portable Digital Milliohmmeter Series 4000

Portable Digital Milliohmmeter Series 4000
Series 4000 Milliohmmeter Technical Specifications

This portable Digital Milliohmmeter is a practical instrument for low resistance measurement, ideal for use in the workshop, field or test facilities. This milliohmmeter is of rugged construction contained in an sturdy Plastic case. The Series 4000 has many advanced features, including Auto ranging, forward and reverse current measurement with auto average, True current zero, protection up to 415 volts rms, digital calibration and long scale length, 4000 count and auto power down to maximise battery life.

LS06 Standard Lead Set supplied with the 4000 series

The test leads provided have a length of 1 metre with spade tags for connection to the milliohmmeter terminals. They are terminated in combined current and potential probes that will accept conductor diameters up to 6mm.

The rechargeable battery option includes a battery pack, docking station and charger.

For ease of operation the control functions have been kept to a minimum and are clearly marked. It is of course direct reading, warning LEDs illuminate when an open circuit lead condition is detected. Over range and low battery indication is also provided.

The Series 4000 milliohmmeters are supplied ready for immediate use with batteries and measuring leads, no extras are normally necessary. To further enhance its performance a full range of test test leads are available as well as rechargeable battery pack, temperature probes and carrying case.

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Key Features

  • True 4 wire measurement eliminates lead resistance errors
  • 6 ranges 40 milliohms to 4 kilohms, long scale length 4000 count. Automatic or manual range selection
  • Input protection up to 415 Volts rms
  • Resolution 10 microhms on 40 milliohm range
  • Forward and reverse current measurement with auto average
  • True current Zero
  • Digital calibration
  • Mains / rechargeable battery operation
  • Open circuit lead warning
  • Rugged industrial and maintenance free design
  • Rechargeable battery option

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Technical Specification

Measurement 4 Terminal Kelvin/Thomson principle eliminates error due to lead resistance. Open circuit measurement voltage approx. 5V dc.
Display 15mm LCD 4000 count with automatic decimal point and polarity indication.
Ranges 6 Ranges with automatic or manual selection
Auto Zero Permits the automatic zero of amplifiers and external circuits eliminating errors due to thermal emf.
Calibration Digital
Protection 415 rms maximum at input terminals.
Battery 5 AA size manganese Alkaline supplied with unit. Rechargeable battery pack option includes 5 AA size Ni/Mhd, housed in removable cassette plus docking station and charger.
Automatic Power OFF ensures maximum battery life
Terminals 4mm safety sockets
Working Temp 0...40°C rel. humidity 80% max. non-condensing.
Storage Temp -20 ... +50°C.
Charger Mains Supply 100/120/220/240 Volts +10% -13%. 47 ... 63Hz. 20VA
Safety EN61010-1 EMC - EN61326
Dimensions 215 x 130 x55 (W H D)
Mass 0.8kg
Accessories Supplied complete batteries, measuring leads with Kelvin Clips, handbook, and calibration certificate.

Resistance Ranges

Range Resolution Typical Current Uncertainly @ 20°C ±5°C, 1 year Temperature Coefficient / °C
4 kohm 1 ohm 100 µA ±(0.05% Rdg + 0.02% FS) 30 ppm Rdg + 1 ppm FS
400 ohm 100 mohm 1 mA ±(0.05

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