The RF4 RF-17N is a high-precision, True‑RMS auto-ranging digital multimeter designed for electronics technicians, field service engineers, and serious DIY enthusiasts. Offering a 6000‑count display, a wide measurement range, and a durable build, it is equally suited for troubleshooting mobile phone motherboards, diagnosing automotive electrical systems, or performing routine maintenance in industrial panels.

Key Features

• True‑RMS (TRMS) Measurement – Accurately measures distorted sine waves from non‑linear loads (motors, switching power supplies, inverters).
• 6000‑Count Large LCD Display – High-resolution 6000‑count readout with backlight for clear visibility even in dimly lit workspaces.
• Auto & Manual Ranging – Auto‑ranging for quick, hassle‑free measurements, with the option to lock a specific range manually.
• Comprehensive Measurement Functions – AC/DC voltage, AC/DC current, resistance, capacitance, frequency, diode test, continuity buzzer, and temperature (K‑type thermocouple).
• Built‑in Transistor (hFE) Test – Dedicated socket and function for measuring the DC current gain of bipolar transistors.
• Temperature Measurement – Integrated K‑type thermocouple port for applications such as HVAC, refrigeration, and thermal monitoring.
• Durable & Portable Design – Compact, lightweight, and built to withstand daily use in repair shops or field environments.
• User‑Friendly Interface – Auto polarity identification, data hold, relative (REL) measurements, max/min recording, and low‑battery indicator.
• Safety & Protection – Designed with over‑range indication (“OL”) and double‑insulated construction for safe operation.