Klein Tools Clamp Meter CL445 HVAC True RMS 600A AC Auto Ranging Digital Multimeter (Voltage DC Microamps Capacitance Temperature NCVT Circuit Diagnostics)

Monitor Current and Voltage Loops Simultaneously to Diagnose Environmental System Inrush Overloads Instantly

The Klein Tools CL445 is an automatically ranging True RMS digital clamp multimeter engineered for the diagnostic measurement of electrical current up to 600A AC and line potential up to 750V AC. This HVAC specialized tester utilizes a unique dual-display mode to present voltage and amperage data sets simultaneously on a single backlit LCD, allowing for real-time monitoring of live system loads. Operating within a certified CAT IV 600V safety envelope, the device integrates a 600µA DC microamps circuit for testing flame sensors alongside a K-Type thermocouple interface to execute environmental climate audits inside unlit mechanical spaces.

Best Used For:

• Flame Sensor Testing: Hooking directly to furnace control lines to analyze low-current DC microamp steps down to 600µA for fast ionization safety audits.
• Motor Inrush Analysis: Capturing surge current thresholds during active HVAC compressor start-up sequences to track failing system capacitors.
• Dual-Vector Power Checks: Measuring operational voltage and active amperage simultaneously on incoming lines to evaluate structural transformer balancing.

Key Performance & Safety Features

• True RMS Auto-Ranging: Auto-selecting TRMS diagnostic logic filters out harmonic waveform anomalies to deliver precision on complex electronic profiles.
• Simultaneous Dual Display: Advanced screen framework tracks voltage drops and current parameters together to maximize troubleshooting visibility.
• Thermocouple Thermal Scans: Integrated K-Type sensor port captures precise ambient, air duct, or component surface temperature metrics from -148°F to 1832°F.
• Non-Contact Voltage Sensing: Built-in non-contact voltage tracking sensor inside the jaw tip executes quick safety line sweeps before direct lead connection.
• High-Impact ABS Casing: Ruggedized industrial composite frame protects sensitive solid-state microprocessors against shop drops up to 6.6 feet.

What's Included

• CL445 HVAC TRMS Clamp Meter
• Set of Right-Angle Input Test Leads
• Set of Push-On Alligator Clips
• K-Type Thermocouple Probes
• Three AAA Alkaline Batteries
• Professional Storage Pouch
• Instruction Manual

Technical Specifications

Pro-Tip: When troubleshooting complex variable frequency motor drives, activate the simultaneous display mode; logging real-time voltage response side-by-side with running amp draw variations isolates high-impedance thermal clipping points instantly.