Kanomax DALT6905 Duct Air Leakage Tester

Overview

The Kanomax DALT6905 Duct Air Leakage Tester is a portable, high-accuracy pressure-based instrumentation system engineered for quantitative evaluation of air leakage performance in HVAC ductwork, fire protection ventilation systems, and sealed enclosures. It operates on the principle of controlled pressurization—either positive or negative—followed by real-time measurement of volumetric airflow required to maintain a stabilized differential pressure across the test section. This method conforms to standardized duct airtightness testing protocols defined in EN 1507, EN 12237, Eurovent 2/2, DW/143, SMACNA, AABC, and GB 50243. The DALT6905 integrates dual-nozzle configuration (large and small) to ensure optimal dynamic range coverage—from low-leakage residential duct segments to high-capacity commercial or industrial main trunks—without requiring external flow conditioning or calibration adapters.

Key Features

• Two interchangeable nozzles: large nozzle (70–820 m³/h) for system-level testing; small nozzle (4–70 m³/h) for localized or low-flow verification—both designed for tool-free, rapid swap in field conditions
• High-resolution digital sensing: ±2.5% flow accuracy (±0.1 m³/h offset), ±1% static pressure accuracy (±1 Pa offset), and ±0.5 °C temperature accuracy enable traceable, repeatable results aligned with ISO/IEC 17025 metrological expectations
• Integrated environmental compensation: simultaneous real-time acquisition of ambient temperature, barometric pressure (70–130 kPa), and duct static pressure ensures corrected volumetric flow values per ASTM E1554 and EN 12237 Annex B
• 5-inch full-color capacitive touchscreen interface with intuitive icon-driven navigation—designed for glove-compatible operation and multilingual UI support (English, Chinese, Spanish preloaded)
• Robust mechanical architecture: aluminum alloy chassis, IP54-rated enclosure, and shock-absorbing transport frame optimized for SUV trunk deployment and repeated site-to-site relocation
• Onboard data management: stores up to 1000 complete test records—including timestamp, pressure curve, flow profile, pass/fail verdict per selected standard—with USB 2.0 export capability for CSV or PDF report generation

Sample Compatibility & Compliance

The DALT6905 supports testing of rigid and flexible ducts (galvanized steel, aluminum, fiberglass-reinforced polymer, and fabric ducts) across all pressure classes (A, B, C per EN 1507). It accommodates both segmented duct runs and fully assembled systems—including plenums, risers, and smoke control shafts—under either positive or negative pressure modes. Built-in compliance logic automatically applies the correct pass/fail threshold based on user-selected standard (e.g., Class C limits per SMACNA, Class 3 per EN 12237, or GB 50243–2016 Section 4.2.3). All measurement algorithms are validated against NIST-traceable reference standards and documented in accordance with GLP requirements for third-party commissioning reports.

Software & Data Management

Firmware v3.2 includes embedded test protocol engines for 12 international duct leakage standards, each with configurable parameters (test duration, stabilization criteria, pressure ramp rate). Audit trail functionality logs operator ID, firmware version, calibration date, and sensor drift alerts—supporting FDA 21 CFR Part 11 compliance when used in regulated pharmaceutical or cleanroom HVAC validation. Exported datasets include raw time-series pressure/flow data, annotated test curves, and summary tables compliant with ASHRAE Guideline 1–2021 reporting templates. Optional PC software (Kanomax DALT Manager) enables batch analysis, trend charting, and integration with BIM-linked commissioning platforms via XML or REST API.

Applications

• Pre-commissioning verification of HVAC ductwork in commercial buildings, hospitals, laboratories, and data centers
• Post-installation leakage certification for LEED EA Prerequisite 1 and BREEAM HEA 01 compliance
• Fire damper and smoke control system integrity validation per NFPA 90A and EN 12101-3
• Quality assurance during prefabricated duct module fabrication under ISO 14644-3 cleanroom classification workflows
• Periodic maintenance auditing of aging duct networks to quantify degradation and prioritize retrofit investments
• Academic and research applications in building physics labs studying pressure-driven infiltration dynamics

FAQ

Does the DALT6905 require annual recalibration?
Yes—Kanomax recommends factory recalibration every 12 months or after 200 test cycles, using NIST-traceable flow and pressure standards. Field verification kits (optional) allow daily zero-check and span verification.
Can it test ducts under negative pressure only?
No—it supports bidirectional pressurization (–2500 Pa to +2500 Pa) with automatic polarity detection and flow direction compensation.
Is USB data export compatible with Excel and LIMS systems?
Yes—CSV exports contain ISO 8601 timestamps, SI units, and metadata headers; custom mapping scripts for LabWare and STARLIMS are available upon request.
What is the minimum duct volume the DALT6905 can accurately test?
With the small nozzle and optimized stabilization algorithm, reliable measurements begin at ~0.8 m³ volume (e.g., 600 mm × 600 mm × 2.2 m straight duct segment).
Does it meet ISO/IEC 17025 requirements for accredited laboratories?
When operated with documented procedures, trained personnel, and maintained calibration records, the DALT6905 satisfies Clause 6.4 (Equipment) and Clause 7.7 (Reporting Results) of ISO/IEC 17025:2017.