Fluke 1577 Insulation Tester - Fluke-1577

The Fluke 1577 Insulation Tester/Multimeter is a compact combination instrument that tests insulation resistance at 500V and 1000V DC while also functioning as a basic digital multimeter, the entry-level combination instrument in the Fluke insulation tester line. For maintenance technicians who occasionally need insulation resistance verification alongside general electrical measurement and do not require the PI/DAR analysis or the Fluke Connect wireless capability of the 1587 FC, the 1577 provides core insulation testing and multimeter functions in a single compact package at a lower price point.

Key Features

• 500V and 1000V Test Voltages: The two most common insulation test voltages covering general wiring insulation checks (500V) and motor winding testing (1000V) without the additional lower voltages of the 1587 FC series. Sufficient for most routine maintenance insulation testing where the test voltage requirement is fixed at 500V or 1000V.
• Insulation Resistance to 999MΩ: Covers the measurement range relevant to routine maintenance insulation checks on industrial and aviation equipment, from near-failed insulation through healthy new equipment insulation values.
• Combination Multimeter Functions: AC/DC voltage measurement, resistance, continuity, and diode test functions built into the same instrument, eliminating the need for a separate multimeter for voltage verification and resistance checks during insulation test maintenance tasks.
• Compact and Lightweight: Smaller and lighter than the 1587 FC series, the 1577 is easier to carry and deploy on routine maintenance inspections where the full capability of the 1587 FC is not required.
• Simple Two-Voltage Selection: Straightforward 500V/1000V selection without the complexity of a five-voltage selector, appropriate for maintenance programs where the test voltage is standardized rather than variable per application.

Technical Specifications Overview

The 1577 measures insulation resistance to 999MΩ at 500V and 1000V test voltages, and provides basic multimeter functions (voltage, resistance, continuity). It does not include PI/DAR testing or Fluke Connect wireless connectivity. Positioned below the 1587 FC (five voltages, PI/DAR, wireless) and the 1507 (500V dedicated tester with PI/DAR), the 1577 serves technicians who need combined insulation + multimeter capability without advanced test functions.

Insulation Testing Applications

• Routine insulation resistance spot-checks on industrial motors and wiring at 500V or 1000V
• Basic cable insulation verification on newly installed or repaired wiring
• Maintenance inspections where standardized 500V or 1000V test voltage is specified
• Combined insulation testing and basic electrical diagnostics in one compact instrument

Fluke 1577 Calibration

PJi operates an ISO/IEC 17025 Accredited Calibration Lab and provides NIST-traceable calibration for the Fluke 1577 at the time of purchase, add calibration to your order at checkout. Our calibration documentation satisfies FAA Part 145 tool control requirements, ISO 9001 quality system records, and AS9100 traceability requirements. PJi is the one-stop source: the instrument and the calibration certificate in a single transaction. Calibration-only companies (Custom-Cal, Fox Valley Metrology, ATS) cannot sell you the instrument. Amazon and Grainger cannot calibrate it. PJi does both.

Why Buy from Pilot John International

Pilot John International is an authorized Fluke distributor with specialized expertise serving aviation maintenance, FAA Part 145 repair stations, and industrial MRO facilities. Unlike Amazon, Grainger, or Test Equipment Depot, which sell Fluke instruments but offer zero calibration services, PJi's in-house ISO/IEC 17025 Accredited Calibration Lab calibrates your instrument at purchase. We stock the full Fluke catalog, ship same-business-day on in-stock items, and our technical staff understands the demands of aviation and industrial electrical maintenance.