VICI Model 345 Dynacalibrator® Dynamic Calibration Gas Generator
| Brand | VICI |
|---|---|
| Origin | USA |
| Manufacturer Type | Authorized Distributor |
| Import Status | Imported |
| Model | Model 345 |
| Price Range | USD 1,400 – 7,200 (based on configuration and regional duties) |
Overview
The VICI Model 345 Dynacalibrator® is a precision-engineered dynamic calibration gas generator designed for trace-level gas standard generation in analytical laboratories, environmental monitoring facilities, and industrial process validation environments. It operates on the well-established permeation tube principle—where analyte mass transfer from a temperature-controlled permeation source into a carrier gas stream is governed by Arrhenius kinetics. This thermally regulated diffusion mechanism enables stable, reproducible output concentrations across a wide dynamic range—from sub-ppb (parts-per-quadrillion) to high-ppm levels—without requiring certified reference gas cylinders. The instrument integrates dual independent mass flow controllers (MFCs), a thermostatically stabilized permeation chamber, and a fully programmable touchscreen interface, delivering metrologically traceable calibration standards for gas chromatography (GC), gas detection systems (e.g., PID, FID, electrochemical sensors), and continuous emission monitoring systems (CEMS).
Key Features
- High-stability permeation chamber with ±0.01 °C temperature control at 110 °C—ensuring <0.5% RSD concentration reproducibility over 24-hour operation
- Dual MFC architecture: one for carrier gas (typically N₂ or synthetic air), one for diluent gas—both calibrated to NIST-traceable standards
- Permeation tube temperature range: 30 °C to 110 °C (or ambient +2 °C minimum), supporting a broad spectrum of volatile organic compounds (VOCs), sulfur compounds, halocarbons, and nitrogen oxides
- Intuitive 7-inch capacitive touchscreen HMI with preloaded calibration templates, real-time flow/temperature logging, and user-defined method storage
- CE-compliant design (2014/30/EU EMC Directive & 2014/35/EU LVD Directive); RoHS 2011/65/EU compliant; meets IEC 61000-6-3 immunity requirements
- Integrated span/overflow valve manifold enabling seamless switching between calibration output (“Span Out”) and excess gas venting (“Overflow”) without manual reconfiguration
Sample Compatibility & Compliance
The Model 345 supports all commercially available permeation tubes certified per ASTM D6167 and ISO 16000-6 for formaldehyde, benzene, toluene, xylene, chloroform, H₂S, SO₂, NO₂, and many others. Its modular chamber accommodates standard 1/4″ OD stainless steel or glass permeation tubes (length ≤ 100 mm). All wetted materials—316L stainless steel, Kalrez® O-rings, and electropolished internal surfaces—are compatible with aggressive analytes and meet USP Class VI biocompatibility requirements. The system is routinely deployed in GLP-compliant laboratories and satisfies audit requirements under FDA 21 CFR Part 11 when paired with validated data acquisition software (e.g., VICI’s CalSoft™ v4.2 with electronic signature and audit trail functionality).
Software & Data Management
Calibration methods—including single-point span, multi-point ramp, and dynamic step-change protocols—are configured via the onboard HMI or exported/imported using CSV templates. Full operational logs (timestamped temperature, MFC setpoints/actuals, chamber status) are stored internally (16 GB flash memory) and exportable via USB or Ethernet (TCP/IP). Optional CalSoft™ software provides remote monitoring, automated report generation (PDF/CSV), and integration with LIMS via OPC UA or MODBUS TCP. All data records include embedded metadata required for ISO/IEC 17025 accreditation—such as uncertainty budgets derived from permeation rate certificates, MFC accuracy specifications, and thermal stability profiles.
Applications
- Primary calibration of fixed and portable gas detectors used in occupational health and safety (OSHA PEL, NIOSH REL verification)
- Method validation and daily system suitability testing for EPA Method TO-15, TO-17, and ASTM D5466 trace VOC analysis
- Zero/span verification of CEMS and ambient air quality monitors (e.g., TEOM, UV-DOAS, FTIR)
- Development and verification of sensor response curves for research-grade electrochemical and photoionization detectors
- Trace impurity calibration in high-purity gas delivery systems for semiconductor fab tool qualification
FAQ
What permeation tube types are supported?
Standard 1/4″ OD stainless steel or borosilicate glass permeation tubes with documented permeation rates (ng/min or µg/min) at specified temperatures. Tubes must be certified per ASTM D6167 or equivalent.
Can the Model 345 generate multi-component gas mixtures?
No—it is a single-analyte dynamic generator. For multi-component standards, sequential use with multiple permeation tubes (requiring manual swap) or integration with a VICI Multi-Permeation Module (MPM-4) is required.
Is external gas supply pressure regulation required?
Yes. Carrier and diluent gases must be supplied at 30–100 psig with particulate and hydrocarbon filtration (0.01 µm filter recommended); optional integrated pressure regulators (PR-200 series) are available.
How often does the permeation tube require replacement?
Typical service life is 6–24 months depending on analyte volatility, operating temperature, and daily duty cycle—tracked automatically via CalSoft™ lifetime estimator using cumulative thermal exposure metrics.
Does the instrument support 21 CFR Part 11 compliance out-of-the-box?
Hardware supports audit trail and electronic signature capability; full Part 11 compliance requires validated CalSoft™ installation, role-based access control configuration, and documented change control procedures per organizational SOPs.
