Zhongxiang ZXRD-7230 Advanced Forced-Air Constant-Temperature Oven

Overview

The Zhongxiang ZXRD-7230 Advanced Forced-Air Constant-Temperature Oven is an engineered solution for precision thermal processing in regulated laboratory environments. Utilizing dry-heat convection principles—where heated air is actively circulated via a rear-mounted horizontal blower—the instrument delivers rapid, uniform thermal energy transfer across the entire 230 L working chamber. Unlike passive conduction ovens, this model employs forced-air dynamics to ensure consistent heat distribution and accelerated drying, baking, sterilization, and depyrogenation cycles. Its operational range extends from ambient +5°C up to 300°C, supporting applications requiring both low-temperature dehydration and high-temperature microbial inactivation. The oven’s architecture integrates a microprocessor-based environmental scanning control system, enabling real-time feedback regulation of chamber temperature with 0.1°C resolution and ≤±1°C fluctuation under steady-state conditions.

Key Features

• High-response platinum RTD sensor paired with an embedded environmental scanning microcontroller for closed-loop temperature regulation
• Rear-mounted horizontal forced-air system ensuring direct convective contact with samples, minimizing thermal gradients and reducing cycle time
• Triple-layer thermal safety protocol: (1) audible/visual overtemperature alarm, (2) automatic heater disconnection upon critical threshold breach, and (3) intelligent auto-restart with rapid re-equilibration after power interruption
• Built-in temperature calibration offset function allowing fine-tuning of displayed vs. actual chamber temperature (traceable to NIST-traceable reference standards)
• Mirror-finish 304 stainless steel interior chamber and electropolished stainless steel shelving—corrosion-resistant, non-porous, and compliant with ISO 14644-1 Class 7 cleanroom-compatible surface requirements
• Tempered glass inner door with dual-seal design for thermal retention and visual sample monitoring without chamber opening
• LED-display interface showing both setpoint and real-time chamber temperature; supports timer operation from 1 minute to 99 hours 59 minutes with end-of-cycle acoustic alert
• Memory retention function preserves user-defined parameters across power cycles, eliminating redundant setup for routine protocols
• Optimized airflow duct geometry and laminar micro-flow channel design minimize turbulence and cross-contamination risk while enhancing thermal homogeneity (≤±2.5% deviation at 300°C)

Sample Compatibility & Compliance

The ZXRD-7230 accommodates a broad spectrum of sample formats—including Petri dishes, glassware, metal instruments, polymer substrates, and moisture-sensitive reagents—without compromising thermal integrity or sterility assurance. Its chamber dimensions (520 × 550 × 800 mm) support standard ISO/IEC 17025-compliant validation layouts for temperature mapping (IQ/OQ/PQ). The unit conforms to GB/T 5170.2–2017 for environmental test equipment performance verification and aligns with foundational requirements of ISO 13485 (medical device manufacturing), USP (sterilization by dry heat), and EU Annex 1 (sterile pharmaceutical production). While not inherently 21 CFR Part 11–compliant, its parameter logging capability supports integration into validated electronic lab notebook (ELN) systems when paired with external audit-trail-enabled data acquisition modules.

Software & Data Management

The ZXRD-7230 operates as a standalone instrument with no proprietary software dependency. All operational parameters—including setpoint, runtime, elapsed time, current temperature, and alarm status—are displayed locally via the LED interface. For laboratories requiring electronic record retention, optional RS-485 or analog 4–20 mA output interfaces (available upon request) enable connection to SCADA systems, LIMS, or centralized HVAC monitoring platforms. Internal memory retains last-used settings and alarm history for up to 100 event logs, supporting GLP-aligned troubleshooting and maintenance documentation. Calibration adjustments are stored in non-volatile memory and remain persistent through firmware updates or power loss.

Applications

This oven serves critical roles across multiple regulated domains: moisture content determination per AOAC 950.46 and ASTM D2216; glassware and instrument depyrogenation in pharmaceutical QC labs; residual solvent removal in polymer synthesis; pre-weighing desiccation of analytical standards; thermal stability testing of excipients per ICH Q1A(R2); and dry-heat sterilization of stainless steel tools where steam autoclaving is unsuitable. Its stable 300°C ceiling also supports ash content analysis (AOAC 923.03), catalyst activation, and ceramic sintering pre-bake steps in materials science workflows.

FAQ

What is the maximum validated sterilization temperature and dwell time supported by this oven?
The ZXRD-7230 achieves full thermal penetration at 160°C for ≥2 hours or 170°C for ≥1 hour—meeting USP dry-heat sterilization criteria for non-porous items.
Can the temperature uniformity be verified per ISO 14644 or ISO 9001 requirements?
Yes. The chamber supports 9- or 15-point temperature mapping using calibrated thermocouples; validation reports may be generated in accordance with ISO/IEC 17025-accredited procedures.
Is the unit suitable for use in cleanroom environments?
Its sealed mirror-finish chamber, low-particulate airflow design, and absence of internal lubricants or volatile coatings make it appropriate for ISO Class 7 cleanrooms when installed with HEPA-filtered supply air.
Does the oven support remote monitoring or network connectivity?
Standard configuration includes local display only; optional communication modules (RS-485, Modbus RTU) are available for integration into facility-wide monitoring networks.
How frequently should temperature calibration be performed?
Per GLP guidelines, initial qualification and annual recalibration against NIST-traceable references are recommended; interim checks using certified reference thermometers should occur before each critical batch run.