This document provides operating instructions for the BEING Scientific BOF Series mechanical convection ovens, covering models BOF-30T, BOF-50T, BOF-120T, BOF-200T, and BOF-400T across Generations 1, 2, and 3.
Function Description:
The BEING BOF Series mechanical (forced air) convection ovens are designed for heavy workloads and continuous, 24-hour operation in a wide variety of chemistry, clinical, light industrial, pharmaceutical, and research laboratory applications. These applications include age testing of electronic components, annealing, ASTM testing, baking, conditioning, curing, dehydrating, die-bonding, dry sterilization, evaporation, drying of glassware and parts, heat treating, heated storage, life cycle testing, moisture and stability tests, polymerization, and pre-heating.
The ovens feature a mirror-finish 304 stainless steel chamber, which provides a strong, corrosion-resistant, inert, and easy-to-clean environment, preventing sample contamination. Wire shelves are designed to maximize air circulation for uniform heating, prevent shelf-tilting, and minimize sample spillage.
A microprocessor-based PID temperature controller and a 3-speed, forced convection heating system ensure uniform temperature regulation without overshoot, protecting samples from damage. The controller supports programming and storage of both fixed-value and multi-segment programs. An adjustable exhaust vent allows users to control chamber temperature uniformity by allowing humidity to escape.
For safety, the ovens include an independent monitoring system that tracks system risks like voltage spikes, short circuits, and over-temperature conditions. This system triggers audible and visual alarms and will shut down the oven if a risk is identified. All BOF Series ovens are equipped with a USB communications port for data logging.
Important Technical Specifications:
- Chamber Volume: Ranges from 1.05 ft³ (30 L) for the BOF-30T to 14.1 ft³ (400 L) for the BOF-400T.
- Operating Environment:
- Ambient Temperature: 41°F to 95°F (5°C to 35°C)
- Relative Humidity: ≤80%
- Atmospheric Pressure: 11.6 psi – 15.4 psi (80kPa – 106kPa)
- Pollution Degree: ≤2 (per IEC 60947-1 and IEC 60664-1)
- No direct sunlight, radiant heat exposure, explosive gases, flammable gases, or corrosive fluids/cleaners.
- Operating Temperature Range: Ambient + 18°F - 572°F (Ambient + 10°C - 300°C).
- Uniformity (@100°C): ±1.5°C (BOF-30T), ±2.5°C (BOF-50T), ±3.0°C (BOF-120T, BOF-200T), ±3.5°C (BOF-400T).
- Temperature Stability: ±0.5°C (@100°C).
- Time to reach 100°C: 30 min (BOF-30T, BOF-50T, BOF-120T), 40 min (BOF-200T, BOF-400T).
- Controller Type: PID with touch capacitive display.
- Display Resolution: 0.1.
- Data Collection: USB-A port.
- Fan Speed: 3-speed DC Brushless Motor (100%, 75%, & 50%).
- Timer (hh:mm): Infinite (00:00) or 00:01 - 99:59.
- Electrical Requirements:
- BOF-30T, BOF-50T, BOF-120T: 120V/60Hz, NEMA 5-15 (BOF-30T, BOF-50T), NEMA 5-20 (BOF-120T).
- BOF-200T, BOF-400T: 240V/60Hz/1Ø, NEMA 6-15 (BOF-200T), NEMA 6-20 (BOF-400T).
- Power Consumption: 900W (BOF-30T), 1100W (BOF-50T), 2050W (BOF-120T), 2500W (BOF-200T), 3200W (BOF-400T).
- Safety Features: Over-temperature protection, temperature limit protection, over-current protection, power off memory, and anti-scalding protection.
- Stackable: BOF-50T and BOF-120T models are stackable.
- Shelves (Std. / Max.): 2/5 (BOF-30T), 2/9 (BOF-50T), 3/12 (BOF-120T), 3/16 (BOF-200T, BOF-400T).
- Shelves Loading: 44.1 lb (20 kg).
- Net Weight: Ranges from 94.8 lb (43 kg) for the BOF-30T to 463.0 lb (210 kg) for the BOF-400T.
Usage Features:
- Touchscreen Controller Display: A 4.3-inch touch-capacitive color display serves as the user interface, sensitive enough to be used with gloves. It displays current conditions (date, time, chamber temperature, time left on program, heating element indicator, memory indicator) and allows access to various settings.
- Program Modes: Nine programs are available: PROG 0 for fixed-value temperature, RUN time, and fan speed, and PROG 1-8 for multi-step programs (up to 8 steps per program, each with specified temperature, fan speed, and run time). Programs can be cycled from 1 to 99 times.
- Temperature Setting: Users can set the oven's temperature for fixed-value programs. For multi-step programs, the button displays the step's temperature setpoint.
- Fan Speed Setting: Three fixed fan speeds (100%, 75%, 50%) can be selected for fixed-value programs. For multi-step programs, the button displays the step's fan speed setpoint.
- Program Run Time Setting: Users can set the program run time for fixed-value programs. For multi-step programs, the button displays the step's run time.
- START/STOP Button: Initiates and halts programs. During a RUN delay, the START button remains on screen until the delay times out.
- Alarm Silence Button: Manages RUN delay time display, cycle count for multi-step programs, and silences audible alarms when END appears or other alarm conditions occur.
- PROG Button: Used for programming step parameters for multi-step programs.
- Operational Settings Button: Provides access to the controller's back-end settings and parameters.
- Data Collection: The USB-A port allows exporting operational data (temperature, time, fan speed, alarm history) to a USB drive. The controller stores up to 50,000 records, and the data logger stores up to 500,000 records. Generation 3 firmware sends all power-on, temperature-related data to the data logger.
- Unit of Measurement: Temperature can be displayed and controlled in Celsius or Fahrenheit. Changes to the unit of measurement must be made prior to setting and running a program.
- Calibration: The touchscreen controller may require calibration, especially after changing units of measurement, to ensure accurate temperature exposure.
- RUN/START Delay Timer: A productivity and safety tool that allows presetting start-up and running times for unattended operation, useful for off-peak hour operation.
- Low/High-temperature Alarms: Adjustable AL parameter (0° to 100° in 0.1° increments) to minimize damage from temperature variations outside the setpoint.
Maintenance Features:
- Preventive Maintenance:
- Calibration: The oven's touchscreen controller should be calibrated at least once per year, or more frequently if used for long periods at a singular setting.
- Cleaning the Exterior: All external surfaces should be cleaned regularly with an all-purpose cleaner and a soft, non-abrasive, moist (not wet) cloth.
- Cleaning the Chamber: The 304 stainless steel chamber surfaces should be cleaned regularly with a non-corrosive cleaner (soapy water, stainless steel cleaner/polish) and a soft, non-abrasive, moist (not wet) cloth. Shelves, shelf brackets, and bracket hangers should be removed for cleaning.
- Cleaning the Electronics: Periodic cleaning of the oven's electronics with compressed air or a vacuum cleaner with a soft brush attachment is recommended to prevent dust buildup, especially in environments with pollution levels greater than 2. Personal protective devices should be worn.
- Cleaning Before Returning Unit: If the oven is returned for any reason, all surfaces must be cleaned and decontaminated of potential pathogens.
- Troubleshooting: The manual provides a comprehensive troubleshooting guide for common issues such as the controller display not illuminating, 'temperature sensor failure' error messages, oven not heating, inaccurate temperature control, abnormal noise, and incorrect date/time display. Possible causes and remedies are listed.
- Storage: For extended periods of non-use, the circuit breaker should be turned off, the power cord unplugged, and the oven covered. The oven's power should be turned on periodically to maintain battery life for the controller's date and time.
- Repair: Installation and repair procedures require specialized skills. Any repairs should be performed in consultation with a BEING technical support representative or a BEING authorized service technician.
- Safety Labels: Safety labels are attached to the oven to provide important hazard information. Damaged labels can be replaced by contacting BEING or a local distributor.
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