Keithley Instruments Inc. 580 Micro-Ohmmeter
Feature:
The 580 Micro-ohmmeter combines high accuracy, resolution, and sensitivity with three special capabilities that make micro-ohm measurements easier and more versatile than ever:
1). When measuring contact and connector resistances, it is important not to puncture oxides and films that may have formed. The 580 ensures this dry circuit test voltage to 20mV on 200mohm, 2ohm, and 20oh ranges when the 20mV MAX button is pressed.
2). The 580 can test more devices by enabling both test current polarity and waveform (DC or pulsed) to be selected. When using pulsed test current, the 580 automatically compensates for thermal EMFs. Tests on inductive devices are best performed using DC test current, as this avoids the effects of time constants on pulsed current resistance measurements. For temperature-sensitive components, a single trigger mode of operation minimizes power delivered to the device. Single trigger operation is possible via the front panel.
3). The option
20mV Voltage clamp
Selectable test Current wavefo
3 sets of test leads
Conv rate: 3 readings/sec
Ext. conctr: Banana jacks
Sel pulsed/DC Source Current
Select pos/neg Source Current
Confi: 4-wire (2 sens, 2 srce)
Ranging: Auto/manual
Setting time: < 1sec