Thermostatic test chamber LFZ-HL series

climatichumiditytemperature

Product overview

• High and low temperature control range: A: -20 ~ 100°C, B: -40 ~ 100°C, C: -60 ~ 100°C (temperature to +150°C optional).
• Humidity control range: 30 ~ 95% RH.
• Programmable control available (LFZ-PHL, LFZ-PHLH series).
• Touch screen / large LCD display controller (programmable models LFZ-PHL / LFZ-PHLH).
• Capacities available: 68 L, 120 L, 250 L, 500 L.

Humanized design

• CFC-free environmentally friendly design.
• Wet and dry bulb or capacitive humidity sensor options; multi-function multi-stage programmable temperature and humidity controller; fuzzy PID control for small precision fluctuations.
• Long-life inlet temperature and humidity sensors; clear digital display (CFL20 6-line LCD mentioned) and keyboard input for easy operation.

Quality assurance

• International-brand compressor and circulating fan for temperature stability and uniformity.
• Environmentally friendly refrigerant R134a for high efficiency and low energy consumption.
• Unique air circulation system to ensure uniform working temperature and humidity.
• Interior liner: imported 304 mirror stainless steel with semicircle corner transitions for easy cleaning; removable shelf supports.
• Multi-stage programmable control supports complex test sequences with automatic operation.

Security features

• Independent limit temperature alarm system: automatic run interruption and audible/visual alarm if limit exceeded.
• High/low temperature and over-temperature alarms.
• Protections: compressor overheating, over-current, overload; fan overheat protection; water protection.

Data processing (optional)

• Optional printer connection or communication via RS-485; USB data transfer (U-disk) to store/display/print temperature, humidity and time curves for tests.

Programmable touch screen controller (LFZ-PHL & LFZ-PHLH series)

• Large touch-screen interface, easy programming and operation; English UI available.
• Real-time graphical display of operation and test curves on-screen.
• Program capacity: up to 1000 segments, 999~100 groups cycle step; each step up to 99 hours 59 minutes.
• Screen lock feature to prevent unintended changes during tests.
• PID auto-tuning function for precise and stable temperature and humidity control; immediate amendment of set conditions.
• RS-232 / RS-485 communication interfaces for PC monitoring and remote control.
• Capacitive humidity sensor available as optional high-precision sensor.

Technical Parameters (summary)
Model: LFZ-HL = High low temperature chamber; LFZ-PHL = Programmable High low temperature chamber
Available model variants: LFZ-HL060A(B,C), LFZ-HL120A(B,C), LFZ-HL250A(B,C), LFZ-HL500A(B,C); LFZ-PHL060A(B,C), LFZ-PHL120A(B,C), LFZ-PHL250A(B,C), LFZ-PHL500A(B,C)
Microprocessor / Controller: LFZ-HL = digital display; LFZ-PHL = programmable LCD touch-screen display
Temperature range: A: -20 ~ 100°C; B: -40 ~ 100°C; C: -60 ~ 100°C (up to +150°C optional)
Temperature fluctuation: ±0.5°C
Temperature uniformity: ±2°C
Humidity range (LFZ-HLH / PHLH series): 30 ~ 95% RH
Humidity fluctuation: ±3% RH
Capacities: 68 L, 120 L, 250 L, 500 L
Working (internal) sizes (W × D × H mm): 400 × 380 × 450 (68L); 500 × 400 × 600 (120L); 600 × 600 × 700 (250L); 800 × 700 × 900 (500L)
External sizes (W × D × H mm): 650 × 1040 × 1650 (68L); 700 × 1040 × 1750 (120L); 800 × 1160 × 1850 (250L); 998 × 1020 × 1730 (500L)
Power supply: For A models: 220V/50Hz; for B & C models: 380V/50Hz
Interior material: 304 mirror stainless steel liner with rounded corners
Refrigerant: R134a (environmentally friendly)
Air circulation: forced circulation system for uniformity; sample test hole diameter 25 mm (example cited) and test volume 7 L reference for sampling ease
Alarms & protection: temperature limit alarm, over-temperature alarm, compressor protection, overload and fan protections
Data & communication: RS-232/RS-485 and USB (U-disk) options for data logging, display and printing