TSI VelociCalc Multi-Function Ventilation Meter Model 9565

Overview

The TSI VelociCalc Multi-Function Ventilation Meter Model 9565 is a precision-engineered, handheld instrument designed for comprehensive air movement and environmental parameter measurement in HVAC commissioning, indoor air quality (IAQ) assessment, cleanroom validation, and laboratory safety cabinet certification. Based on thermal anemometry and differential pressure transduction principles, the 9565 delivers direct, real-time readings of air velocity (0.01–50 m/s), temperature (–20 to 80 °C), relative humidity (0–100% RH), and differential pressure (±125 Pa), with optional expansion to CO₂, VOC, and volumetric flow via interchangeable smart probes. Its architecture integrates a microprocessor-controlled analog front end, auto-ranging sensor electronics, and factory-calibrated transducers traceable to NIST standards—ensuring metrological integrity across field-deployed applications requiring regulatory compliance (e.g., ISO 14644, ASHRAE 110, NSF/ANSI 49, and EU GMP Annex 1).

Key Features

• Modular hot-swap probe system supporting up to two simultaneously active sensors—including thermal anemometer (964 series), vane anemometer (35 mm and 100 mm diameter), Pitot tube (800187, 46 cm straight), and specialty probes for CO₂, VOC, and thermal comfort indices.
• Ergonomic, IP54-rated enclosure with tactile keypad, programmable key lock, and high-contrast graphical LCD capable of displaying five measured parameters concurrently with contextual units and status icons.
• On-device calibration verification and zero-point adjustment for velocity and differential pressure channels—enabling field traceability without return-to-factory procedures.
• Internal data logger with non-volatile memory: stores up to 32,767 records; user-configurable sampling intervals (1 second to 24 hours); programmable start/stop triggers; time-stamped metadata (date, time, probe ID, operator tag).
• Integrated Bluetooth® 4.0 and USB 2.0 interfaces for wireless telemetry or direct cable download—compatible with TSI’s LogDat2™ (data export to CSV/Excel) and TrakPro™ (statistical analysis, trend visualization, customizable report generation per ISO/IEC 17025 requirements).
• Built-in support for dual K-type thermocouple inputs (Type K alloy), enabling surface temperature and thermal gradient measurements alongside airflow characterization.

Sample Compatibility & Compliance

The Model 9565 is validated for use across ductwork traverses, fume hood face velocity mapping, biosafety cabinet inflow/exhaust verification, HEPA filter uniformity testing, and thermal comfort surveys (PMV/PPD calculation). All standard probes are supplied with individual NIST-traceable calibration certificates. The instrument complies with IEC 61000-4 electromagnetic immunity standards and meets CE marking requirements. For regulated environments, its data logging firmware supports audit trails, electronic signatures, and 21 CFR Part 11–compliant operation when used with TrakPro™ in locked-down mode—facilitating GLP/GMP-aligned documentation workflows.

Software & Data Management

LogDat2™ provides intuitive drag-and-drop data retrieval, automatic unit conversion, and batch export to Excel-compatible formats (.csv, .xlsx). TrakPro™ extends functionality with statistical process control (SPC) charts, spatial averaging algorithms for multi-point duct traverses, and automated pass/fail evaluation against user-defined thresholds (e.g., ASHRAE 110 hood acceptance criteria). Both applications generate PDF reports with embedded metadata, instrument configuration logs, and calibration history—essential for third-party audits and regulatory submissions.

Applications

• HVAC system balancing and TAB (Testing, Adjusting, and Balancing) per NEBB and AABC protocols
• Face velocity validation of chemical fume hoods and Class II biological safety cabinets
• ISO Class 5–8 cleanroom air change rate and unidirectional flow uniformity assessment
• Thermal comfort studies using simultaneous dry-bulb, wet-bulb, globe temperature, and air velocity inputs
• Turbulence intensity and air diffusion performance evaluation in displacement ventilation systems
• Leak detection and pressure decay testing in containment enclosures and negative-pressure isolation rooms

FAQ

Does the Model 9565 require annual recalibration?
Yes—TSI recommends annual calibration against NIST-traceable standards. Only the probe(s) in use need to be returned; the main unit remains field-deployed.
Can the 9565 log data while operating on battery power?
Yes—continuous logging is fully supported during battery operation, with low-battery warnings and automatic safe shutdown to preserve stored records.
Is TrakPro™ software validated for 21 CFR Part 11 compliance?
TrakPro™ v5.2+ includes configurable audit trail, electronic signature, and role-based access controls—meeting core technical requirements for Part 11 when deployed on validated IT infrastructure.
What is the maximum probe extension length for duct traverse measurements?
With optional telescoping probe rods (sold separately), total reach extends to 3 meters; all extensions maintain full signal integrity and thermal compensation accuracy.
How does the 9565 handle condensation during high-humidity RH measurements?
The integrated RH sensor features hydrophobic filtration and automatic dew-point compensation, minimizing drift and condensation-induced error in environments up to 95% RH at 40 °C.