KANOMAX DAL T6900 Duct Air Leakage Tester for Fire Dampers

Overview

The KANOMAX DAL T6900 Duct Air Leakage Tester is a precision-engineered instrument designed specifically for quantitative air leakage assessment of HVAC ductwork systems under controlled positive and negative static pressure conditions. It operates on the principle of calibrated orifice flow measurement—using interchangeable nozzles and integrated differential pressure transducers—to determine volumetric leakage rates in accordance with internationally recognized duct airtightness standards. The system is widely deployed during commissioning, post-installation verification, and periodic compliance audits of commercial and institutional HVAC installations—including fire dampers, control valves, air handling units, and segmented or fully assembled duct networks. Its dual-range flow architecture (4–36 m³/h via nozzle bank; 36–640 m³/h via main blower circuit) enables high reproducibility across low-leakage residential ducts and high-capacity industrial systems alike. The device meets the physical and metrological requirements specified in EN 1507, EN 12237, and SMACNA’s “HVAC Air Duct Leakage Test Manual,” supporting both Class A (tight) and Class C (standard) duct sealing classifications.

Key Features

• Simultaneous bidirectional pressure testing capability: configurable for +2500 Pa (positive) or –2500 Pa (negative) static pressure application with real-time feedback
• Dual-mode flow measurement: high-accuracy nozzle-based quantification (4–36 m³/h) for low-leakage validation; wide-range blower-driven measurement (36–640 m³/h) for system-level integrity checks
• Integrated environmental compensation: concurrent measurement and correction for ambient temperature (0–60 °C, ±0.5 °C), atmospheric pressure (70–130 kPa, ±2%), and static pressure (±2500 Pa, ±1% ±1 Pa)
• Self-contained human-machine interface: 4.7-inch full-color resistive touchscreen with intuitive menu navigation, graphical real-time trend display, and on-device pass/fail judgment per selected standard
• Robust mechanical architecture: cast-aluminum housing, vibration-damped mounting frame, and modular nozzle assembly for field serviceability and long-term calibration stability
• Comprehensive onboard data management: non-volatile memory storing up to 1000 complete test records—including timestamp, pressure setpoint, measured leakage rate, environmental parameters, and pass/fail status

Sample Compatibility & Compliance

The DAL T6900 is validated for use with rigid and semi-rigid HVAC duct constructions—including galvanized steel, aluminum, fiberglass-reinforced polymer (FRP), and flexible insulated ducts—provided they are isolated from active air handling equipment and sealed at all non-test openings. It supports direct compliance verification against multiple regulatory frameworks: EN 1507:2006 (metallic rectangular ducts), EN 12237:2002 (circular ducts), Eurovent 2/2 (performance classification), DW/143 (UK ductwork specification), SMACNA HVAC Air Duct Leakage Testing Standard (U.S. industry benchmark), and GB 50243–2002 (Chinese ventilation and air conditioning engineering code). While not certified to ISO/IEC 17025 as a standalone calibration laboratory, the instrument’s traceable accuracy—verified using NIST-traceable reference manometers and rotameters—supports GLP-compliant reporting when operated within documented SOPs and maintained per KANOMAX’s scheduled calibration intervals.

Software & Data Management

All test data are stored locally in a structured binary format compliant with IEC 62443-3-3 security guidelines for industrial control devices. Export is supported via USB 2.0 port to CSV or PDF report templates preconfigured with mandatory fields: project ID, duct section ID, test date/time, technician ID, pressure class, measured leakage (m³/h @ Pa), environmental corrections applied, and final conformance statement. Optional PC software (KANOMAX DuctTest Suite v3.x) provides advanced analytics—including leakage vs. pressure curve fitting, historical trending across multiple sites, and automated generation of ASTM E1554-compliant summary reports. Audit trails record all parameter changes, user logins, and firmware updates in alignment with FDA 21 CFR Part 11 requirements for electronic records and signatures when enabled.

Applications

• Commissioning verification of newly installed HVAC duct systems prior to handover
• Periodic retesting of fire dampers after maintenance or actuation events per NFPA 80 and local fire codes
• Energy performance diagnostics: quantifying avoidable fan energy losses attributable to duct leakage (ASHRAE Guideline 12–2020)
• Third-party certification support for LEED BD+C v4.1 EQ Credit: Minimum Indoor Air Quality Performance
• Quality assurance audits by building control authorities, municipal inspection departments, and independent TAB (Testing, Adjusting, Balancing) firms
• Research applications evaluating sealant efficacy, gasket degradation, and joint design performance under cyclic thermal and pressure loading

FAQ

What duct pressure classes can the DAL T6900 validate?
It supports Class A (≤0.027 m³/(h·m²) @ 250 Pa), Class B (≤0.054 m³/(h·m²) @ 250 Pa), and Class C (≤0.27 m³/(h·m²) @ 250 Pa) per SMACNA, with automatic pass/fail logic based on entered duct surface area and selected standard.
Does the unit require external calibration gas or reference standards?
No. All sensors are factory-calibrated using traceable primary standards; field verification uses built-in zero and span checks. Annual recalibration by an ISO/IEC 17025-accredited lab is recommended.
Can it test fire dampers without disassembly?
Yes—when installed in-line and accessible via test ports, the DAL T6900 applies controlled pressure upstream/downstream of the closed damper blade to quantify blade and frame leakage independently per UL 555S Annex A.
Is the touchscreen interface compatible with gloved operation?
The resistive touch panel responds reliably to stylus or gloved finger input; haptic feedback and large icon spacing minimize misoperation in site environments.
How is data integrity ensured during extended field deployments?
Each test record includes embedded CRC-32 checksums, write-protection flags, and tamper-evident timestamps synchronized to internal RTC (±2 sec/month drift).