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Technical Specifications
No. | Item | Specification |
1 | Temperature control range | Room temperature ~ –196 °C (for ambient ≤ 25 °C) |
2 | Specimen basket dimensions | 210 mm (L) × 130 mm (W) × 70 mm (H) |
3 | Temperature stability | ±1 °C |
4 | Digital temperature controller | Resolution 0.1 °C |
5 | Cooling medium | Liquid nitrogen |
6 | Power supply | AC 220 V, 50 Hz |
7 | Power consumption | 200 W |
8 | Overall dimensions (L×W×H) | 720 × 590 × 740 mm |
9 | Liquid nitrogen tank capacity | 35 L |
Basic Configuration
1. Insulation: Polyurethane foam insulation
2. Stirring device: 1 set
3. Temperature control device: High-precision intelligent digital temperature controller (installed on main unit)
4. Specimen basket: 1 piece
5. Specimen clamp: 1 piece
6. Liquid nitrogen tank: 35 L (optional 35–150 L)
7. Vacuum oil-free pump: 1 unit
8. Pressure gauge: 1 set (installed on the pump)
9. Oil-water filter: 1 set
10. Special liquid nitrogen connecting pipe: 1 set
Equipment Features
· Equipped with universal wheels for easy movement.
· Specimen basket allows convenient placement and removal of specimens.
· Drain port facilitates the recovery of the cooling medium and cleaning.
· Features temperature alarm and insulation timing.
Protection Functions:
· Overload protection
· Leakage protection
· Phase loss protection
· Phase sequence protection
· Grounding protection
· System pressure protection
· Medium over-temperature protection (prevents dry burning)
Installation and Operation
The DWC-196 has simple installation, easy operation, rapid cooling, and high temperature control accuracy. Installation steps are as follows:
1. Place the unit horizontally and lock the wheels.
2. Connect the liquid nitrogen tank pipe to the cooling bath, using a PTFE gasket to prevent leakage.
3. Connect to 220 V power supply and turn on the main switch.
4. Set the target temperature, open the liquid nitrogen tank valve, press the cooling button, and set the holding time.
5. Once the target temperature and holding time are reached, the buzzer will alarm. Close the alarm after temperature stabilization—specimen cooling and temperature holding are complete. Repeat the temperature holding process for subsequent experiments.
Acceptance, Installation, and Training
(a) After the equipment arrives at the purchaser’s site, installation must be completed under guidance from the supplier’s technical staff. The supplier is responsible for wiring, commissioning, and training the operators to independently operate the device and perform basic troubleshooting.
(b) Acceptance criteria: According to the contract and national standards.
Quality Assurance
· The equipment is considered officially delivered only after on-site acceptance by the purchaser.
· Warranty period: 1 year from formal delivery.
· During the warranty, the supplier provides free repair services for all equipment faults. For non-human-caused component damage, parts are replaced free of charge.
· After the warranty, the supplier will provide timely on-site service and assistance for any equipment failure.
Confidentiality of Technical Information and Documentation
· This technical proposal is company proprietary information. Users must maintain confidentiality for all technical data provided, whether or not this proposal is implemented. This clause is permanent.
· The supplier also undertakes confidentiality obligations for technical information provided by the user.
