Jianhu JH-Series Precision Forced-Air Oven with LCD Display
| Brand | Jianhu |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model Series | JH-9040A / JH-9070A / JH-9140A / JH-9240A |
| Power Supply | 220 V, 50 Hz |
| Temperature Range | RT+10 °C to 250 °C |
| Temperature Resolution | 0.1 °C |
| Temperature Uniformity | ±1.5% |
| Temperature Fluctuation | ±1 °C |
| Input Power | 800 W / 1550 W / 2050 W / 2450 W |
| Chamber Dimensions (W×D×H, mm) | 340×320×340 / 450×400×450 / 550×450×550 / 600×550×600 |
| Capacity | 40 L / 80 L / 136 L / 220 L |
| Standard Shelves | 2 pcs |
| Timer Range | 1–9999 min |
| Optional Features | Independent Over-Temperature Cut-Off Alarm |
Overview
The Jianhu JH-Series Precision Forced-Air Oven is an engineered thermal processing instrument designed for consistent, repeatable drying, curing, sterilization, and conditioning applications in quality control laboratories, academic research facilities, and industrial manufacturing environments. Utilizing forced-air convection with a high-efficiency axial fan and optimized internal airflow ducting, the oven ensures uniform heat distribution across the entire chamber—critical for ASTM D1654 (coating performance), ISO 5725 (measurement accuracy), and GLP-compliant stability studies. Its microprocessor-based temperature control system implements adaptive PID logic with fuzzy inference algorithms to minimize overshoot and accelerate thermal equilibration, delivering stable setpoint maintenance within ±1 °C fluctuation and ≤1.5% spatial uniformity—even under dynamic load conditions.
Key Features
- Mirror-finish stainless steel interior chamber with seamless, radius-rounded corners (R ≥ 15 mm) and removable shelf supports—enabling rapid decontamination and compliance with ISO 14644-1 cleanroom-compatible cleaning protocols.
- Large-format backlit LCD display showing real-time temperature, setpoint, timer status, and operational mode simultaneously; intuitive navigation keys reduce operator training time and support multilingual UI firmware updates (English/French/German/Spanish).
- Adaptive PID controller with auto-tuning capability—dynamically adjusts proportional, integral, and derivative gains based on thermal inertia and load mass, ensuring <60-second recovery time after door opening (per JIS Z 8806 test method).
- Independent mechanical over-temperature safety cut-off circuit (optional)—hardwired to a bimetallic thermostat separate from the main control board, meeting IEC 61010-1 Category II requirements for Class III laboratory equipment.
- Dual communication interfaces (optional): 4–20 mA analog output for integration with legacy PLC-based monitoring systems; RS485 Modbus RTU port supporting up to 32 daisy-chained devices for centralized data logging per FDA 21 CFR Part 11 Annex 11 audit trail requirements.
Sample Compatibility & Compliance
The JH-Series accommodates standard ISO/IEC 17025-accredited sample containers—including Petri dishes (Ø90–150 mm), aluminum weighing pans, glass desiccators, polymer film reels, and PCB substrates—without airflow obstruction. Chamber volume options (40 L to 220 L) align with USP dry-heat sterilization validation protocols requiring minimum dwell times at ≥160 °C. All models are CE-marked per Directive 2014/30/EU (EMC) and 2014/35/EU (LVD); factory calibration certificates traceable to NIM (National Institute of Metrology, China) are provided with each unit. Optional IQ/OQ documentation packages support GMP facility qualification per WHO TRS 986 Annex 15.
Software & Data Management
While the oven operates autonomously via its embedded controller, optional PC software (Jianhu TempLog Pro v3.2) enables remote parameter configuration, real-time graphing of temperature profiles, and automated report generation in PDF/CSV formats. Data integrity safeguards include user-level access control (admin/operator/guest), electronic signature capture, and immutable audit logs recording timestamped events: setpoint changes, door openings, alarm triggers, and calibration interventions—all compliant with ALCOA+ principles for regulated environments.
Applications
- Residual solvent removal from pharmaceutical intermediates (ICH Q5C)
- Moisture content determination per AOAC 950.46 and ASTM D2298
- Curing of epoxy-coated electrical components under IPC-CC-830B
- Accelerated aging of polymers per ISO 188 and ASTM D573
- Pre-conditioning of test specimens prior to tensile or impact testing (ISO 291, ASTM D618)
- Stability chamber qualification per ICH Q1A(R2) guidelines
FAQ
What is the maximum operating temperature and how is thermal stability verified?
The oven achieves a maximum setpoint of 250 °C with sustained stability of ±1 °C over 8-hour continuous operation, verified using NIST-traceable PT100 probes placed at nine standardized locations (center + eight corners) per ISO 17025 clause 5.10.3.
Can the JH-Series be integrated into a LabVantage or Thermo Fisher SampleManager LIMS?
Yes—via the optional RS485 interface and Modbus RTU protocol, enabling bidirectional communication for batch ID assignment, temperature log ingestion, and alarm forwarding without middleware.
Is third-party calibration certification available?
Yes—Jianhu partners with TÜV SÜD and SGS to provide on-site or depot-based calibration services with uncertainty budgets reported per ISO/IEC 17025:2017 Annex A.3.
Does the oven meet UL or CSA safety standards for North American installation?
The base model complies with IEC 61010-1; UL/cULus listing requires field verification by a Nationally Recognized Testing Laboratory (NRTL) due to regional wiring and grounding requirements—consult Jianhu’s North America technical support for pre-submission guidance.
How often does the PID controller require recalibration?
No periodic recalibration is required—the adaptive algorithm continuously self-adjusts during normal operation; however, annual verification against reference standards is recommended for GLP/GMP audits.
