Tianhong TH-2003BZ(SRP) Primary Ozone Calibration System

Overview

The Tianhong TH-2003BZ(SRP) Primary Ozone Calibration System is a traceable, laboratory-grade reference standard generator designed to establish and maintain metrological equivalence for ozone (O₃) measurement across ambient air quality monitoring networks. Engineered in accordance with China’s national environmental standards GB 3095–2012 and HJ 654–2013, the system functions as a primary calibration source by generating certified ozone concentrations via photolysis of oxygen under controlled UV irradiation, followed by precise dilution with high-purity zero air. Its core architecture integrates a stable UV photometric ozone analyzer—traceable to national metrology institutes—as the primary concentration reference, enabling direct comparison against field-deployed ozone analyzers used in continuous emission monitoring systems (CEMS) and automatic air quality monitoring stations (AQMS). Unlike secondary transfer standards, the TH-2003BZ(SRP) operates on the principle of absolute ozone generation and real-time photometric quantification, ensuring minimal uncertainty propagation during calibration hierarchy transfer.

Key Features

• Integrated SRP (Standard Reference Photometer) host unit featuring a NIST-traceable UV photometric ozone analyzer with dual-beam optical path and temperature-stabilized mercury lamp source
• High-purity zero air generation system delivering <1 ppb hydrocarbon, <1 ppb NOₓ, <1 ppb SO₂, dew point ≤ –70 °C, particle-free (<0.01 µm)
• Digital mass flow controllers (MFCs) with ±0.5% full-scale accuracy and active thermal compensation for O₂ and zero air streams
• 7-inch capacitive touchscreen interface supporting bilingual (Chinese/English) menu navigation, real-time parameter visualization, and audit-ready event logging
• Automated temperature and pressure compensation per ISO 8573-1 and ASTM D6159, applying real-time corrections to volumetric flow and concentration calculations
• All-wetted materials constructed from PTFE or PVDF to eliminate catalytic ozone decomposition and surface adsorption artifacts
• Modular design supporting integration with external ozone generators (e.g., UV or corona discharge types) for extended concentration range validation up to 1,000 nmol/mol

Sample Compatibility & Compliance

The TH-2003BZ(SRP) is validated for calibration of chemiluminescence (CLD), ultraviolet absorption (UV-DOAS), and electrochemical ozone analyzers deployed in fixed-site AQMS, mobile laboratories, and regulatory reference laboratories. It meets the performance requirements specified in HJ 654–2013 for gaseous pollutant calibrators—including linearity error ≤±2%, repeatability ≤±1.5%, and stability drift ≤±1% over 24 h—and conforms to the traceability framework outlined in GB/T 27418–2017 (Guidance on Measurement Uncertainty Evaluation). The system supports GLP-compliant operation through hardware-enforced user authentication, electronic signature capability, and immutable audit trails compliant with FDA 21 CFR Part 11 when configured with optional secure software modules.

Software & Data Management

The embedded control software provides synchronized acquisition of UV absorbance, MFC setpoints, ambient T/P, and ozone concentration output at 1 Hz resolution. All raw data are timestamped and stored locally in IEEE 754-compliant binary format with SHA-256 checksum integrity verification. Export options include CSV (ISO 8601 timestamps), XML (ASTM E2054-compliant metadata schema), and PDF calibration certificates containing uncertainty budgets per GUM (JCGM 100:2008). Remote diagnostics and firmware updates are supported via TLS 1.2-encrypted Ethernet connection; no cloud dependency or third-party telemetry is implemented.

Applications

• Primary calibration of ozone monitors at national and provincial environmental monitoring centers
• Inter-laboratory comparison studies and proficiency testing programs coordinated by CNEMC or CMA-accredited bodies
• Validation of ozone transfer standards used in QA/QC protocols for ambient air monitoring networks
• Supporting regulatory compliance audits under China’s “Blue Sky Defense Campaign” and regional ozone precursor control initiatives
• Research applications requiring high-fidelity ozone exposure generation for atmospheric chemistry simulation and sensor development

FAQ

Is the TH-2003BZ(SRP) suitable for field deployment?

No—it is a laboratory-based primary standard requiring climate-controlled environments (20–25 °C, RH 30–60%), stable power supply (220 V ±5%, 50 Hz), and dedicated exhaust ventilation for ozone abatement.
Does the system provide traceability to international standards?

Yes—the UV photometer is calibrated annually against a national primary standard maintained by NIM (National Institute of Metrology, China), with documented uncertainty ≤0.8% (k=2) for ozone concentration.
Can it calibrate multi-gas analyzers simultaneously?

It directly generates and certifies ozone concentration; SO₂, NO₂, and CO calibration requires separate certified gas standards and is outside the scope of this instrument’s primary function.
What maintenance intervals are recommended?

Zero air filters: every 3 months; UV lamp: every 12 months; MFC recalibration: every 6 months; full system verification per HJ 654–2013 Annex B: annually.