Fluke 1537: 2500V Insulation Resistance Meter (Digital High-Voltage Megohmmeter)

The Fluke 1537 is a digital high-voltage megohmmeter designed for insulation resistance testing up to 500 GΩ. It features fast-measurement technology delivering stable readings and increased work efficiency.

Core capabilities include automatic calculation of polarization index (PI) and dielectric absorption ratio (DAR). The device offers exceptional battery life with up to 1,300 measurements at 2500V or 6,500 measurements at 250V on eight AA alkaline cells.

Safety features include dangerous voltage alarm functionality and compliance with CAT IV 600V standards and China power industry specifications DLT845. All probes and ports have undergone 30,000 mating cycle testing for reliability.

Beyond basic insulation testing, the 1537 adds AC/DC voltage measurement and resistance testing capabilities. It provides fine-tunable test voltage from 250V to 2500V in 100V increments. Step mode enables linear increment testing with breakdown voltage indication. The device automatically calculates dielectric discharge rate (DD) to identify difficult-to-detect multilayer insulation problems.

Additional features include user-defined labeling, timed measurements, and data storage with PC software download capability. Operating temperature range spans -10°C to +50°C with ≤80% relative humidity tolerance (10-30°C).

Key Specifications: Insulation Resistance Range: Up to 500 GΩ Test Voltage Range: 250V to 2500V (±3% + 3V accuracy) Leakage Current: 1 nA to 2 mA Short Circuit Current: >5 mA Capacitance: 0.01 μF to 2.00 μF VAC Range: 0–600.0V (0.1V resolution, ±2% + 10 accuracy) VDC Range: 0–600.0V (0.1V resolution, ±2% + 10 accuracy) Resistance: 0Ω to 60.00 kΩ Display: 73.5 mm × 104 mm Dimensions (H × W × L): 184 mm × 211 mm × 93 mm Weight: 1.3 kg IP Rating: IP40 Battery: 8 AA alkaline cells (IEC LR6) Operating Temperature: -10°C to +50°C Storage Temperature: -20°C to +60°C Operating Humidity: ≤80% RH (10–30°C), non-condensing

Standards Compliance: IEC 61557-1, IEC 61557-2, IEC 61557-16, IEC 60529, IEC 61326-1, CISPR 11 (Group 1, Class A)