Fluke 177 True-RMS Multimeter - Fluke-177

The Fluke 177 True-RMS Digital Multimeter delivers the same 1000V measurement range, analog bargraph, backlit display, and True-RMS accuracy as the 179, without the built-in temperature measurement function. For technicians who already carry a separate temperature instrument, or whose work doesn't require thermal measurement, the 177 provides all the electrical measurement capability of the 179 at a lower price point. It is a member of Fluke's ESFP (Engineered Solutions for Professionals) series and shares the 179's robust build quality and CAT IV 600V / CAT III 1000V safety rating.

Key Features

• True-RMS AC Measurement: Accurate voltage and current readings on non-linear loads, electronic ballasts, VFDs, switching power supplies, and UPS systems, where averaging meters read 10–40% low. Critical for correct wire sizing and protection device selection.
• 1000V AC/DC Range: Covers all commercial and industrial distribution voltages including 120V, 208V, 277V, 480V, and 600V three-phase systems, plus DC systems to 1000V.
• Analog Bargraph: Responds 40× faster than the digital display for observation of dynamic signals, motor speed transitions, sag-on-load events, and tuning adjustments that update too quickly for numeric tracking.
• 6,000-Count Backlit Display: Clear digit size with backlight for low-light panel and equipment room work. Display is readable at arm's length in standard panel lighting.
• AC/DC Current to 10A: Branch circuit current, load verification, and control circuit current without a separate clamp meter on most maintenance jobs.
• Resistance to 50MΩ: High-resistance range covers insulation spot-checks, conductor identification, and open-circuit verification.
• Capacitance to 10,000µF: Motor capacitor testing, filter cap verification, and power factor correction capacitor checks.
• Min/Max/Average Recording: Unattended monitoring captures electrical events during motor starts, load switching, and other transient conditions.
• CAT IV 600V / CAT III 1000V Safety: Rated for service entrance and distribution panel measurements with full overvoltage protection.

Technical Specifications Overview

The 177 measures AC/DC voltage to 1000V, AC/DC current to 10A, resistance to 50MΩ, capacitance to 10,000µF, and frequency to 100kHz, identical to the 179 except without the temperature measurement function. It sits alongside the 179 in Fluke's mid-range professional line, above the 600V-rated compact 115/116 series, and below the 289's data logging capability. The 177 is the right choice when temperature measurement is handled elsewhere and cost matters.

Industrial & Commercial Electrical Applications

• Commercial electrical troubleshooting, branch circuit voltage, load current, and panel voltage measurement up to 1000V
• Motor and drive commissioning, supply voltage, output voltage, and current measurement at motor terminals and VFD output
• UPS and battery system verification, DC bus voltage, charge current, and float voltage measurement on backup power systems
• Industrial control panel diagnostics, voltage at PLCs, drives, and I/O modules, relay coil current, and solenoid valve current draws

Fluke 177 Calibration

PJi operates an ISO/IEC 17025 Accredited Calibration Lab and provides NIST-traceable calibration for the Fluke 177 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 calibration traceability requirements. For repair stations and quality-certified facilities that require documented traceability, PJi is the one-stop source: the instrument and the calibration certificate in a single transaction. Calibration-only companies cannot sell you the instrument. Major retailers 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.