• Test voltages to up 10 kV
• CAT III 1000 V, CAT IV 600 V safety rating
• Warning function alert for increased user safety
• Selectable test voltages in 50 V steps from 250 V to 1000 V, and 100 V steps above 1000 V
• Up to 99 memory locations
• Over 750 tests between battery charges
• Automatic calculation of Dielectric Absorption (DAR) and Polarization Index (PI)
• Guard system eliminates the effect of surface leakage current on high-resistance measurements
• Large digital/analog LCD
• Capacitance and leakage current measurement
• Ramp function for breakdown testing
• Resistance measurements up to 2TΩ
• Timer settings up to 99 minutes

Fluke insulation testers can now conduct the entire range of test voltages specified in IEEE 43-2000 with a best in class, 3 year warranty and CAT IV 600 V safety rating. With measurement storage and PC interface, the 1550C and 1550C are perfect tools for pre-ventative or predictive maintenance programs designed to identify potential equipment failures before they occur.