Portable Digital Micro-Ohmmeter Series 4000 Data Sheet (.pdf)
The series 4000 digital micro-ohmmeter offer true portability without any sacrifice to accuracy or functionality. These ruggedly constructed ohmmeters are housed in a stylish plastic case with an easy to use keyboard, the measured values are displayed in large LCD panel. 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 (model 4001). Rechargeable batteries with automatic power off ensures the best possible battery performance.
| Range |
Resolution |
Typical Current |
Uncertainty @20°C ±5°C, 1 year |
Temperature Coefficient / °C |
| 4kΩ |
1Ω |
100mA |
±(0.05%Rdg + 0.02% FS) |
30ppm Rdg +1 ppm FS |
| 400Ω |
100mΩ |
1mA |
±(0.05%Rdg + 0.02% FS) |
30ppm Rdg +1 ppm FS |
| 40Ω |
10mΩ |
10mA |
±(0.05%Rdg + 0.02% FS) |
30ppm Rdg +1 ppm FS |
| 4Ω |
1mΩ |
10mA |
±(0.05%Rdg + 0.03% FS) |
30ppm Rdg +4 ppm FS |
| 400mΩ |
100 mΩ |
10mA |
±(0.05%Rdg + 0.05% FS) |
30ppm Rdg +25 ppm FS |
| 40mΩ |
10 mΩ |
100mA |
±(0.05%Rdg + 0.05% FS) |
30ppm Rdg +25 ppm FS |
TECHNICAL DATA ON THE SERIES LOM-DO4000 MiICRO-OHMMETER
The series 4000 portable digital micro-ohmmeters are a practical range of instruments for low resistance measurement, ideal for use in the workshop on site or in the laboratory. Constructed in a hand portable plastic case sealed to IP54 standard the LOM-4000 offers many advanced features, including auto reverse of measurement current, which eliminates errors due to thermal emf. A true zero button, which will allow the measurement to be set to zero. Protection up to 415Vrms at the measurement terminals and automatic temperature compensation (model 4001).
Range selection may be either automatic or manually selected, and the rechargeable battery pack is easily and quickly replaced with a spare unit, ensuring minimum measurement down time. To further enhance the battery life an automatic power off facility is incorporated.
The measured values are displayed in a large LCD screen with LED indicator lamps to show the measurement units and open circuit lead condition.
The LOM-4000 series micro-ohmmters are delivered ready to use with battery pack, test leads, and calibration certificate.
ACCESSORIES FOR THE MODEL LOM-DO400 DIGITAL MICRO-OHMMETER
Supplied complete with Battery pack and external charger, measuring leads with Kelvin clips and calibration certificate
Pt100 sensor supplied with the LOM-DO4001
ADDITIONAL FEATURES AVAILABLE ON MODEL LOM-DO4001 DIGITAL MICRO-OHMMETER
TEMPERATURE COMPENSATION (Model 4001)
Automatic temperature compensation with coefficients for copper, brass plus user coefficients.
TEMPERATURE MEASUREMENT
Measurement of temperature with Pt100 sensor. Measurement range -200...+850°C
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