I. Model:
HF-8103 Walk-in High and Low Temperature Test Chamber / Walk-in Constant Temperature and Humidity Chamber

II. Temperature and Humidity Specifications:

1. Temperature Range:
   Max Test Temperature: +85°C
   Min Test Temperature: -10°C / -20°C / -40°C / -60°C (customizable)
2. Humidity Range: 30~98% RH*⁴
3. Temperature Fluctuation: ±0.5°C
4. Temperature Deviation: ±2.0°C
5. Humidity Deviation:
   ±3.0% RH (＞75% RH)
   ±5.0% RH (≤75% RH)*⁴
6. Temperature/Humidity Control Method:
   BT(H)C Balanced Temperature & Humidity Control Method (BT(H))

III. Construction and Configuration:
7. Operating Environment Temperature: +5~+35°C

1. Chamber Structure:
   Made of polyurethane foam composite modular panels
• Exterior: Powder-coated galvanized steel
• Interior: Stainless steel
2. Humidifier: Stainless steel heating humidifier (steam or water pan type)*⁴
3. Fan: Centrifugal fan

IV. Refrigeration System:
11. Refrigeration Method:
- Single-stage mechanical compression
- Cascade mechanical compression (Water-cooled)*⁵

1. Compressor:
• Fully enclosed or semi-hermetic compressor
2. Refrigerant:
• HCFC-22 or HCFC-22 / HFC-23
3. Heat Exchanger:
• Finned heat exchanger
• Stainless steel brazed plate heat exchanger

V. Electrical and Safety Features:
15. Standard Features:
- Heated viewing window
- Cable port (Ø80 mm)
- Interior lighting
- Hour meter

1. Power Supply:
• AC 380V ±10%, 50Hz ±0.5Hz, 3-phase 4-wire + protective earth
2. Safety Devices:
• Leakage circuit breaker
• Anti-dry protection (humidifying system)
• Water system protection
• Fan overheating protection
• Compressor overpressure/overheat/overcurrent protection
• Phase protection
• Over-temperature protection
• Thermal fuse