Introducing the insulation tester 1537 with advanced features for service technicians, electricians, and companies that maintain equipment such as motors, transformers, control cabinets, and solar systems. This device offers finely adjustable test voltages from 250 to 2,500 V, resistance measurements up to 500 GO, and a short-circuit current of up to 5 mA, enabling quick and stable measurements. Enhance productivity and equipment safety with a single tool that simplifies troubleshooting and delivers fast and accurate results. With intelligent measurement functions such as automatic calculation of the polarization index (PI) and dielectric absorption ratio (DAR), wide measurement ranges, and high safety according to CAT IV 600 V, along with an integrated voltage alarm, the Fluke 1537 provides reliable and stable insulation testing in a compact device. Additional features like voltage and resistance measurements for both DC and AC, along with easy data management using the included software package, make it the best choice for insulation testing.