TM-508A Milliohm Meter

TM-508A Milliohm Meter

The TM-508A Battery Powered Milli-Ohmmeter offers very low impedance measurement by the Four Wire method (one pair of testing clips supplied).TM-508A applications include measurement of resistance in motor coils, transformers and printed circuit boards, plus the measurement of conductor, light electricity and welding point. The instrument’s wide measurement range is from 0.1mΩ to 20kΩ in 6 positions.

Features

  • 3-1/2 digit LCD display with maximum reading of 2000.
  • Battery powered with Low battery indication.
  • Zero adjustment: External zero adjustment control.
  • Very low impedance measurement, four-wire type, one pair insulated clip.
  • Wide measurement range, 0.1 mΩ to 20kΩ in 6 positions.
  • D – H Switch: Lockup readings for LCD display.
  • Fuse protection: 2 Amp/250Volt (5mm x 20mm), fast minimum interrupt ratings 1500A.
  • Low battery indication

Applications

  • Utility area : measurement of secondary transformer winding; measurement of division switch for sufficient low-ohm value.
  • Manufactures or uses of relays and protective device.
  • Manufactures of switches buttons, contact material.

Downloads

Technical Specifications

Measuring Ranges Accuracy Resolution Testing Current Open-Terminal Voltage
200 milliohms ±(0.3% + 4d) 0.1 milliohm 100mA 1.0 Volt maximum
2 ohms ±(0.3% + 4d) 1 milliohm 10mA 1.0 Volt maximum
20 ohms ±(0.3% + 4d) 10 milliohms 10mA 1.0 Volt maximum
200 ohms ±(0.3% + 4d) 0.1 ohm 1mA 1.0 Volt maximum
2k ohms ±(0.3% + 4d) 1 ohm 1mA 1.0 Volt maximum
20 kohms ±(0.3% + 4d) 10 ohms 1mA 1.0 Volt maximum

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