ALT-621-50 (Preston Pressure) Features and Specifications *

The Preston Pressure ALT-621-50 is a high-precision digital altimeter engineered for aviation testing, offering altitude measurements up to 50,000 feet. Its advanced features include a multi-unit display for feet, meters, millibars, and inches of mercury, along with a backlit LCD for enhanced visibility. The device also supports leak testing and precise calibration through seven altitude points, ensuring reliability and accuracy. Compact and lightweight at 0.6 lbs, the ALT-621-50 is easy to transport and use in various testing environments. 

The ALT-621-50 is an advanced model of the ALT-621, specifically engineered for higher-altitude measurements.  While it shares design elements with its smaller counterpart, the ALT-621, the ALT-621-50 expands on its capabilities by supporting higher altitudes, making it more versatile for demanding aviation applications. With its durable construction and intuitive operation, the ALT-621-50 is ideal for ground-based altimeter testing and maintenance. Operators can perform annual calibrations, initiate leak tests, and adjust settings easily through the device's ergonomic interface. Calibration data is securely stored in the device’s memory, even when powered off, ensuring continuity and efficiency. Although it does not meet RVSM precision standards or function as an onboard system, the ALT-621-50 remains a valuable tool for aviation professionals, offering the accuracy, flexibility, and dependability required for effective altimeter testing and calibration.

Features

• Extended Altitude Range: Measures altitudes from -1,000 to 50,000 feet (-305 to 15,240 meters).
• Precise Resolution: Outputs altitude in 1-foot increments or 1-meter increments for detailed readings.
• Multi-Unit Display: Allows switching between feet, meters, millibars (mBar), and inches of mercury (inHg).
• LCD Interface: Equipped with a 2.53” x 0.53” LCD display with backlighting for optimal visibility.
• Leak Check Functionality: Offers a configurable leak check timer (30 to 120 seconds) to monitor altitude variations.
• Seven-Point Calibration: Ensures accuracy with calibration points at 0 to 50,000 feet in 10,000-foot increments.
• Compact and Lightweight Design: Weighs 0.6 lbs (270 grams) and features a durable, space-efficient design.
• EEPROM Calibration Memory: Stores calibration data securely without requiring power.
• Temperature Range: Operates effectively between 32°F and 125°F (0°C and 51°C).
• Universal Mounting Options: Can be mounted at any angle or position for convenience.

Benefits

• High Accuracy: Enables precise testing and calibration of aircraft altimeters, ensuring reliable performance.
• Versatile Applications: Suitable for various testing scenarios, with flexibility in unit selection for global use.
• User-Friendly Interface: Simplifies operation with easy-to-read displays and intuitive button controls.
• Portable and Durable: Compact and lightweight design enhances portability while maintaining robustness.
• Cost Efficiency: Minimizes the need for frequent repairs or recalibration with durable components and secure memory storage.
• Time-Saving Features: Quick setup and leak check functionality reduce downtime in testing procedures.
• Enhanced Calibration Precision: The seven-point calibration process ensures accurate adjustments across the entire altitude range.

Capabilities

• Altitude Measurement: Handles a wide range of altitudes up to 50,000 feet, accommodating most aviation testing needs.
• Leak Testing: Identifies altitude stability over adjustable time intervals to ensure the reliability of altimeters.
• Calibration Flexibility: Self-corrects to nearest calibration points for improved accuracy and consistency.
• Adaptable Power Supply: Operates on a 12VDC power source with minimal current draw (150 mA).
• Durable Operation: Performs reliably across a broad temperature spectrum, making it suitable for varying environments.
• Memory Retention: Maintains calibration settings even when powered off, ensuring continuity in performance.

Specifications

• Altitude Range: -1,000 to 50,000 feet (-305 to 15,240 meters)
• Resolution: 1-foot increments (feet) / 1-meter increments (meters)
• Fitting Threads: 1/8 inch NPT
• Power Supply: 12VDC with 150 mA draw, positive center polarity
• Operational Temperature: 32°F to 125°F (0°C to 51°C)
• Calibration Points: Seven (0, 10,000, 20,000, 30,000, 40,000, 45,000, and 50,000 feet)

BASIC INFORMATION

CHARACTERISTICS

* Preston Pressure ALT-621-50 technical specifications is provided for reference only. Avionteq cannot ensure accuracy of the technical specifications presented herein. The technical data may not relate entirely to all model and versions of the ALT-621-50 such as the models sold by Avionteq.

Buy, sell, trade-in or rent Preston Pressure ALT-621-50 Air Data Test Set.

Avionteq offers both new and refurbished or used Preston Pressure ALT-621-50 Digital Altimeter Indicator, 50,000 ft version for sale or rent at most competitive price. All refurbished equipment are thoroughly tested and come with our warranty and fresh calibration certificate (when required). You can also sell your excess / surplus Preston Pressure ALT-621-50 or receive trade-in credit towards purchase of other test equipment.