Fluke 1503 Insulation Tester, Digital Megaohmmeter
Fluke 1503: input impedance 3 MΩ (nominal), <100 pF.
Fluke 1503: tests insulation voltage of 500V, 1kV and insulation test resistance of 100kΩ to 2GΩ. Possible applications in sensing and instrumentation, signal processing, testing and measurement. For other data, see datasheet.