Kanomax DALT6905 Duct Air Leakage Tester

Overview

The Kanomax DALT6905 Duct Air Leakage Tester is a precision-engineered, portable instrumentation system designed for quantitative assessment of air leakage in HVAC ductwork, fire-rated ventilation systems, and sealed enclosures. It operates on the principle of calibrated orifice flow measurement under controlled static pressure differential—applying standardized pressurization protocols to quantify volumetric leakage rates in accordance with internationally recognized duct integrity testing methodologies. Unlike qualitative smoke or ultrasonic methods, the DALT6905 delivers traceable, repeatable, and auditable quantitative data required for commissioning verification, energy code compliance (e.g., ASHRAE 90.1, IECC), and LEED documentation. Its dual-nozzle architecture enables seamless transition between low-flow (4–70 m³/h) and high-flow (70–820 m³/h) regimes without recalibration, ensuring metrological continuity across segmented duct sections and full-system validation.

Key Features

• Integrated multi-parameter real-time display: simultaneous visualization of leakage volume (m³/h), static pressure (Pa), ambient temperature (°C), and barometric pressure (kPa) on a 5-inch high-contrast color LCD touchscreen.
• Dual interchangeable nozzle configuration: quick-swap large and small calibrated orifices—mechanically secured with ISO-standard sealing interfaces—to maintain NIST-traceable flow coefficient integrity during field deployment.
• Ruggedized transport design: compact footprint (480 × 627 × 1124 mm) and net weight of 59.8 kg enable secure stowage in standard SUV cargo compartments, eliminating need for dedicated service vehicles.
• Wide operating envelope: ±2500 Pa static pressure range supports both positive-pressure (supply ducts) and negative-pressure (return/exhaust ducts) testing per EN 12237 and SMACNA Class III requirements.
• Onboard data governance: internal non-volatile memory stores up to 1000 complete test records—including timestamp, pressure ramp profile, final leakage value, and pass/fail status—exportable via USB 2.0 to CSV-compatible analysis software.

Sample Compatibility & Compliance

The DALT6905 is validated for use across rigid and flexible duct constructions—including galvanized steel, aluminum, fiberglass-reinforced polymer (FRP), and fire-rated sheet metal—assemblies conforming to EN 1507 (rectangular ducts), EN 12237 (circular ducts), and GB 50243–2016 (Chinese HVAC construction standards). Its pressure control algorithm dynamically compensates for thermal drift and barometric variation during extended hold periods, ensuring stability over the full 0–60 °C operational range. The instrument’s firmware embeds logic-based pass/fail evaluation per user-selected standard (e.g., SMACNA leakage class A/B/C, Eurovent 2/2 Class 1–4), automatically applying allowable leakage thresholds relative to duct surface area and test pressure. All measurements adhere to ISO/IEC 17025 traceability principles through factory calibration certificates with uncertainty budgets reported per ISO/IEC 17025:2017 Annex A.3.

Software & Data Management

No proprietary desktop software is required for basic operation; however, optional Kanomax DuctTest Suite (v3.2+) provides advanced post-processing capabilities including automated report generation (PDF/Excel), multi-test comparative analytics, and audit trail logging compliant with FDA 21 CFR Part 11 requirements for electronic records and signatures. Each stored test record includes embedded metadata: operator ID, site location GPS coordinates (via optional Bluetooth GNSS module), environmental conditions at start/end of test, and digital signature verification. Data export preserves native resolution (0.01 m³/h, 0.1 Pa) without rounding or interpolation, supporting third-party integration into CMMS platforms such as IBM Maximo or Siemens Desigo CC.

Applications

• Pre-commissioning leakage verification of newly installed HVAC duct networks prior to insulation and ceiling closure.
• Periodic maintenance auditing of aging commercial building duct systems to quantify degradation-induced energy loss (typically 15–30% of HVAC fan energy).
• Fire damper and smoke control system integrity validation under NFPA 90A and EN 12101-3 pressure differentials.
• Validation of cleanroom and pharmaceutical facility envelope tightness per ISO 14644-3 Annex B and EU GMP Annex 1 §4.37.
• Research-grade characterization of duct joint sealing performance using ASTM E1554-22 reference test methods.

FAQ

Does the DALT6905 meet ISO/IEC 17025 calibration requirements?
Yes—each unit ships with a factory calibration certificate issued by Kanomax Japan Calibration Laboratory, accredited to ISO/IEC 17025:2017. Certificate includes expanded uncertainty values at multiple points across the flow and pressure ranges.
Can the instrument perform both pressurization and depressurization tests in a single setup?
Yes—the bidirectional pressure transducer and reversible blower assembly support full ±2500 Pa range without hardware reconfiguration, enabling sequential positive/negative tests per EN 12237 Annex A.
Is USB data export compatible with Windows, macOS, and Linux operating systems?
Yes—exported .csv files are plain-text, UTF-8 encoded, and require no driver installation; compatible with Excel, LibreOffice Calc, Python pandas, and MATLAB.
What maintenance intervals are recommended for field accuracy retention?
Annual verification against NIST-traceable flow and pressure standards is advised; Kanomax recommends quarterly zero-checks using the built-in pressure sensor self-test function and nozzle visual inspection for debris or deformation.
How does the DALT6905 handle variable ambient barometric conditions during high-altitude testing?
The integrated barometric sensor continuously corrects flow calculations using real-time local atmospheric pressure (70–130 kPa), eliminating manual correction factors required by legacy analog testers.