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Portable Digital Milliohmmeter Model DO4000

The series 4000 digital ohmmeters offer true portability without any sacrifice to accuracy or functionality. These ruggedly constructed instruments are housed in a stylish plastic case with an easy to use keyboard, the measured values are displayed in a large LCD screen. Automatic or manual range selection is available and many advanced measurement features are included, long scale length 4000 count, auto average of forward and reverse current measurement; true zero of measured value and temperature compensation (mode 4001). Rechargeable batteries with automatic power off ensures the best possible battery performance.

The model 4001 not only has automatic temperature compensation but will also measure and display temperature over the range -50 ~ 850°C
Technical Specification
Range Resolution Typical Current Uncertainty @20°C±5°C 1 year Temperature Coefficient /°C
4 k Ohm 100 mOhm 1 mA ±(0.05% FX + 0.02% Rdg) 30ppm Rdg + 1 ppm FS
400 Ohm 10 m Ohm 10 mA ±(0.05% FX + 0.02% Rdg) 30ppm Rdg + 1 ppm FS
4 Ohm 1 m Ohm 10 mA ±(0.05% FX + 0.03% Rdg) 30ppm Rdg + 4 ppm FS
400 m Ohm 100µ Ohm 10 mA ±(0.05% FX + 0.05% Rdg) 30ppm Rdg + 25 ppm FS
40 m Ohm 10 Ohm 100 mA ±(0.05% FX + 0.05% Rdg) 30ppm Rdg + 25 ppm FS
Display 15mm LCD 4000 count with automatic decimal point and polarity indication
Ranges 6 ranges, with manual or automatic range selection. LED indication of measurement units
Average Automatic average and display of measurement with forward and reverse current.
Zero Zero button to null measurement offsets
Calibration Digital pass code protected
Protection 415Vrms maximum at terminals will blow internal protection fuse
Battery Removable battery pack with 5 1.5Volt non-rechargeable batteries. Seperate rechargeable battery pack, charger and docking station are available options.
Terminals 4mm safety sockets
Working Temperature 0...40°C rel. humidity 80% max. non condensing
Storage Temperature: -20...+50°C
safety EN61010-1 EMC-EN61326
Dimensions 215 x 130 x 55mm (H W D)
Mass 0.8kg
Accessories Supplied complete with non-rechargeable battery pack, measuring leads with Kelvin clips operating instructions and calibration certificate.
Features
  • True 4 terminal measurement eliminates lead resistance errors
  • Wide measuring range 40mOhm...4kOhm, 10 µohm resolution on lowest range
  • Auto/manual range selection
  • Enhanced accuracy with Auto average of forward and reverse measurements
  • True zero button
  • Digital calibration
  • Rechargeable battery operation
  • Auto power off to maximise battery life
Additional Features on DO4001
  • Automat ic temperature compensation with coefficients for copper, brass plus user coefficients
  • Displays resistance and temperature -50...+800°C
  • Temperature measurement
Range Resolution Uncertainty
-200 ~ 850°C 0.1°C 0.05% FX + 0.02% Rdg
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Last modified February 07, 2007.

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