DW-XL668 Biomedical Freezer

The Meling DW-XL668 biomedical freezer provides 668 L (23.6 cu. ft.) of storage capacity with a temperature range of −15°C to −30°C. Its upright cabinet combines microprocessor temperature control, temperature data logging, adjustable shelving, and audible and visual alarms for laboratory and biomedical sample storage.

The cabinet measures 883 × 890 × 1936 mm, approximately 34.8 × 35.0 × 76.2 inches (W × D × H), and includes four adjustable wire shelves, an interior LED light, an ergonomic door handle, and a heated vacuum relief port.

Certifications

- UL/cUL listed.

Temperature Control and Refrigeration

- Microprocessor temperature controller.
- Digital LED display with maximum and minimum temperature display functions.
- Display accuracy: 0.1°C.
- Switchable °C/°F temperature display.
- Direct cooling system with one compressor.
- Manual defrost.
- R290 hydrocarbon refrigerant with a 150 g charge.
- 80 mm insulation at the door, left and right sides, and back.
- TPE double door seal.

Cooling Performance and Energy Consumption

- Temperature uniformity: 2.0°C.
- Pull-down time to −30°C: 1.89 hours.
- Peak variance: 3.4°C.

The manufacturer’s performance figures were tested under the Energy Star standard for laboratory-grade freezers.

Energy consumption meets Energy Star standard (Lab grade freezer).

Temperature Data Logging and Monitoring

The built-in data logger records temperature every 10 minutes and stores up to 12 months of temperature records. It supports automatic or manual querying, recording, and downloading of temperature graphs and recorded temperature data, with USB data export.

An RS485 interface and a remote alarm contact are included. The backup battery keeps the alarm system functional for over 48 hours.

Audible and Visual Alarms

The freezer provides 10 unique alarm types:

- High/low temperature.
- High ambient temperature.
- Power failure.
- Low battery.
- Sensor error.
- Main board communication error.
- Condenser overheating.
- Door ajar.
- Data logger alarm.
- Data logger failure alarm.

Cabinet and Storage Features

- Four adjustable wire shelves.
- Shelf maximum loading capacity: 45 kg.
- Carbon steel coated plate exterior.
- Sprayed aluminum plate interior.
- Overhanging LED interior light.
- Ergonomic door handle.
- Maximum door opening angle: 180°.
- Heated vacuum relief port.
- TPE double door seal.
- Standard overcurrent protector.
- One access port with a diameter of 23 mm.
- Four heavy-duty casters, two leveling feet, and two brakes.

Optional Accessories

- Inkless chart recorder with factory presetting for automatic recording of the temperature curve.
- Freezing boxes with 9 × 9 or 10 × 10 tube configurations.
- 304 stainless steel side-access freezing racks.

The specified optional rack configuration accommodates 16 racks and 400 freezing boxes.

Electrical Specifications

Main Specifications