TSI VelociCalc® Multi-Parameter Ventilation Meter Model 9565 / 9565-A / 9565-P / 9565-X
| Brand | TSI |
|---|---|
| Origin | USA |
| Model | 9565 / 9565-A / 9565-P / 9565-X |
| Temperature Range (964/966/980/982 probes) | −10 to 60 °C |
| Temperature Accuracy | ±0.3 °C (at 25 °C) |
| Temperature Resolution | 0.1 °C |
| Air Velocity Range (960/962 probes) | 0–50 m/s |
| Air Velocity Accuracy | ±3% of reading or ±0.015 m/s, whichever is greater |
| Air Velocity Resolution | 0.01 m/s |
| CO Range (982 probe) | 0–500 ppm |
| CO Accuracy | ±3% of reading or ±3 ppm, whichever is greater |
| CO₂ Range (980/982 probes) | 0–5000 ppm |
| CO₂ Accuracy | ±3% of reading or ±50 ppm, whichever is greater |
| CO₂ Resolution | 1 ppm |
| Relative Humidity Range | 0–95% RH |
| RH Accuracy | ±3% RH (at 25 °C) |
| RH Resolution | 0.1% RH |
| Pressure Range (Differential/Static) | −3735 to +3735 Pa |
| Pressure Accuracy | ±1% of reading or ±1 Pa |
| Pressure Resolution | 1 Pa |
| Data Storage Capacity | 26,500 data points across 100 user-defined groups |
| Operating Temperature | 5–45 °C |
| Dimensions | 9.7 × 21.1 × 5.3 cm |
| Weight (with batteries) | 0.36 kg |
| Power | 4 × AA batteries or optional AC adapter |
Overview
The TSI VelociCalc® Multi-Parameter Ventilation Meter (Models 9565, 9565-A, 9565-P, and 9565-X) is a handheld, field-deployable instrument engineered for comprehensive HVAC system commissioning, indoor air quality (IAQ) assessment, and ventilation performance verification. It operates on the principle of thermal anemometry for low-velocity airflow measurement, supplemented by NDIR (non-dispersive infrared) spectroscopy for CO₂ quantification, electrochemical sensing for CO detection, and capacitive polymer sensors for relative humidity. Its modular architecture—centered on interchangeable, microprocessor-equipped “Smart Probes”—enables traceable calibration, sensor-specific compensation algorithms, and real-time computation of derived parameters including volumetric flow rate, wet-bulb temperature, dew point temperature, thermal comfort indices (e.g., sensible heat flux), and turbulence intensity. Designed for compliance with ASHRAE Standard 111, ISO 7726, and ANSI/ASHRAE Standard 62.1, the VelociCalc® supports quantitative evaluation of ventilation effectiveness in laboratories, cleanrooms, healthcare facilities, and commercial buildings under dynamic operating conditions.
Key Features
- Modular Smart Probe interface with embedded calibration coefficients stored directly in each probe’s memory—eliminating host-based calibration drift and enabling probe-only recalibration.
- Simultaneous real-time display of up to five measured or calculated parameters (e.g., velocity, temperature, RH, CO₂, differential pressure) on a high-contrast backlit LCD.
- Wide-range thermal anemometer probes (0.015–50 m/s) optimized for accuracy below 1 m/s, critical for low-velocity duct and grille testing per ASTM D1212 and ISO 16813.
- NDIR-based CO₂ probe (0–5000 ppm) with temperature-compensated output and factory calibration traceable to NIST standards; includes built-in zero-stabilization algorithm for long-term stability.
- Integrated differential, static, and atmospheric pressure measurement using piezoresistive transducers compliant with IEC 61262 requirements for pressure instrumentation.
- Bluetooth® v4.0 support for wireless data transfer to TRAKPRO™ Data Analysis Software or LogDat2™ mobile application—enabling remote logging, geotagging, and audit-ready report generation.
- User-configurable data acquisition modes: manual trigger, timed interval (1 s to 1 h), or event-triggered logging based on threshold exceedance (e.g., CO > 35 ppm).
Sample Compatibility & Compliance
The VelociCalc® series accommodates over ten probe configurations—including straight and articulating thermal anemometers (960/962/964/966), 100-mm vane anemometers (995), surface and ambient air temperature probes (792/794), and IAQ probes (980/982) measuring CO, CO₂, temperature, and RH simultaneously. All probes meet RoHS Directive 2011/65/EU and are CE-marked for EMC (EN 61326-1) and safety (EN 61010-1). The instrument complies with GLP documentation requirements via timestamped, password-protected data groups and full audit trail capability when used with TRAKPRO™ software configured for 21 CFR Part 11 compliance (electronic signatures, change control, and user access logs). Calibration certificates issued with each probe reference NIST-traceable standards and include uncertainty budgets per ISO/IEC 17025:2017.
Software & Data Management
TRAKPRO™ Desktop Software (v5.0+) provides post-processing, statistical analysis (mean, min/max, standard deviation), graphical trending, and automated report generation in PDF or Excel formats. It supports batch import of multi-probe datasets, customizable calculation templates (e.g., CFM = velocity × area × K-factor), and export to CSV for integration with BMS or CMMS platforms. LogDat2™ mobile app extends functionality to iOS and Android devices, enabling live monitoring, photo-annotated field notes, and cloud synchronization via secure HTTPS endpoints. Both applications enforce role-based access control and maintain immutable metadata—including operator ID, GPS coordinates (if enabled), probe serial numbers, and calibration expiration dates—to satisfy ISO 17025 clause 7.7 and FDA GMP Annex 11 requirements for data integrity.
Applications
- HVAC system balancing and TAB (Testing, Adjusting, and Balancing) per NEBB Procedural Standards.
- Commissioning and periodic re-commissioning of laboratory fume hoods, biosafety cabinets, and cleanroom supply/exhaust systems.
- Indoor environmental quality (IEQ) surveys supporting LEED IEQ Credit 1 and WELL Building Standard W02.
- Occupational exposure assessment for CO in parking garages, boiler rooms, and industrial maintenance zones.
- Educational use in mechanical engineering and industrial hygiene curricula for hands-on ventilation physics instruction.
- Regulatory compliance audits for OSHA 1910.94 (ventilation), EPA Indoor Air Quality Tools for Schools, and EU Directive 2009/125/EC ecodesign requirements.
FAQ
How is calibration traceability maintained across probe swaps?
Each Smart Probe contains its own EEPROM storing NIST-traceable calibration coefficients, temperature compensation tables, and serial-numbered certificate data. The meter reads this information automatically upon insertion—no manual entry or host recalibration required.
Can the 9565-P model operate without any probe attached?
Yes—the 9565-P functions as a standalone pressure meter with integrated barometric, differential, and static pressure transducers. It does not require probe attachment for pressure-only measurements.
What is the recommended recalibration interval for IAQ probes?
TSI recommends annual calibration for CO and CO₂ sensors under typical use conditions; more frequent verification (e.g., quarterly bump testing with certified gas standards) is advised in high-exposure or regulated environments per ISO 14644-3 and USP <851>.
Does the instrument support custom K-factors for non-standard duct geometries?
Yes—users can input custom K-factors or select from preloaded duct shape libraries (rectangular, round, oval) within the flow calculation menu to ensure accurate CFM derivation per ASHRAE Fundamentals Chapter 42.
Is firmware update capability available in the field?
Firmware updates are performed via USB connection using TRAKPRO™ software and require no hardware modification—ensuring ongoing compatibility with evolving regulatory reporting formats and sensor firmware enhancements.
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