Extech EX520A-NIST High Accuracy True RMS Multimeter

The Extech EX520A-NIST is a high accuracy True RMS digital multimeter with a NIST Calibration Certificate, combining 0.09% basic DCV accuracy with documented measurement traceability for use in regulated aviation maintenance, precision diagnostics, and quality-controlled MRO environments. It brings together the EX520A's precision measurement capability, CAT IV-600V rating, IP67-rated waterproof and dustproof housing, 20A current capacity, LoZ function, and low-pass filter, with NIST-traceable calibration documentation for compliance with FAA Part 145, military calibration standards, and ISO 9001 quality management requirements.

Key Features

• NIST Calibration Certificate included, establishes measurement traceability for regulated maintenance documentation and calibration program compliance
• 0.09% basic DCV accuracy, precision-grade for critical voltage measurements requiring documented measurement traceability
• True RMS for accurate results on aircraft inverter circuits, variable frequency systems, and switching power supplies
• CAT IV-600V safety rating for safe use at primary distribution and service entrance level
• IP67 waterproof, dustproof housing with 2-meter drop protection for harsh aviation maintenance environments
• LoZ input eliminates ghost voltage readings on de-energized circuits
• Low-pass filter for accurate measurements on VFD and inverter outputs
• 6000-count backlit LCD, up to 20A AC/DC current, MIN/MAX, and data hold

Specifications

• DC Voltage: up to 600V
• AC Voltage: up to 600V (True RMS)
• DC/AC Current: up to 20A
• Display: 6000-count backlit LCD
• Basic DCV Accuracy: ±0.09%
• True RMS: Yes
• LoZ Function: Yes
• Low-Pass Filter: Yes
• Calibration: NIST Certificate Included
• Safety Rating: CAT IV-600V
• IP Rating: IP67 (Dustproof/Waterproof)
• Drop Proof: 2m (6.5 ft)

Applications

The EX520A-NIST is selected by aviation maintenance organizations, MRO facilities, and quality assurance programs where both high measurement precision and calibration documentation are required. Its 0.09% accuracy supports critical voltage measurements used in aircraft battery testing, power quality analysis, and avionics calibration workflows where measurement uncertainty must be minimized and documented. The NIST certificate provides the calibration baseline required for FAA Part 145 repair station tool control programs, military calibration labs, and quality audit documentation, making the EX520A-NIST the right choice when both performance and compliance matter.

Need Your Extech EX520A-NIST Calibrated?

• PJi operates an ISO/IEC 17025 Accredited Calibration Lab and provides NIST-traceable calibration for the Extech EX520A-NIST at purchase.
• Documentation satisfies FAA Part 145, ISO 9001, and AS9100 requirements.
• PJi is the one-stop source: instrument and certificate in one transaction.

Why Buy from Pilot John International?

• Pilot John International is an authorized Extech distributor with an in-house ISO/IEC 17025 Accredited Calibration Lab.
• One-stop source for Extech instruments and NIST-traceable calibration in a single transaction.
• We serve aviation maintenance, FAA Part 145 repair stations, and industrial MRO facilities.
• Full-catalog availability and same-business-day shipping on in-stock items.