Thermostatic test chamber LFZ-CTHP series

climatichumiditytemperature

Product description
LFZ-CTHP Series programmable constant temperature and humidity test chambers are designed to simulate high/low temperature and humid environments encountered during transport, storage and use of electronic instruments, materials, electrical components, vehicles, metals, aerospace materials and similar products. They support continuous or cyclic tests to verify resistance to temperature, humidity and combined stress, and to detect potential damage or life reduction.

Reliability test controller & software

• 7-inch high-resolution color display; 32-bit high-performance processor
• 24-bit A/D conversion; supports thermocouple and RTD inputs; up to 4 temperature inputs; adaptive fuzzy full-area control
• Two-level user/manufacturer permission settings
• Programmable I/O: 8 DI inputs and 10 relay outputs for flexible integration

Features — A. Chamber construction

• Inner chamber: SUS304 stainless steel plate (1.2 mm) — corrosion resistant, easy to clean
• Outer cabinet: painted cold-rolled steel plate (1.2 mm); standard color scheme as per configuration
• Door: explosion-proof handle, secure sealing with refined silicone rubber resistant to temperature aging
• Insulation: ultra-fine glass fiber; non-metal connectors between inner/outer box to reduce thermal conduction; isolated humidification
• Mobility: lockable PU castors for positioning
• Sample racks: SUS304 punched mesh, adjustable; standard supply includes two racks
• Test port: Φ50 mm with thermal insulation and sealing plug
• Observation window: double-layer vacuum-strengthened glass with inner conductive heating for defog/defrost

Features — B. Refrigeration system

• Imported compressors (examples: German brands or Tecumseh) and environmentally friendly refrigerants (e.g. R404A / R23); binary low-temperature circuit options for extreme ranges
• PID + SSR coordinated control for accurate temperature/humidity regulation
• High-precision controllers with 0.1 ℃ display resolution

Features — C. Heating & humidification system

• Heating: nickel-chromium electric heating elements; independent high-temperature heating circuit
• Humidification: stainless-steel humidifier with internal Ni-Cr heating wire and high-temperature MgO filling for fast response and long life
• Independent heating and humidification subsystems with automatic water make-up

Features — D. Control system

• Programmable LCD controller with digital PID/FUZZY control; touch settings and graphical program editing
• Humidity shown in %RH; PT100 platinum resistance sensors
• Support for multi-segment programs, fixed-value and program modes, arbitrary time settings
• Main electricals: circuit breakers and contactors by CHINT; other electrical accessories by reputable brands
• Data handling: printer or RS232/RS485; USB/SD data export; PC software for curve display, storage and printing

Features — E. Protection system

• Overall overheat protection
• Fan overheating protection
• Phase loss and phase-sequence protection
• Refrigeration overload and overpressure protection
• Timing, leakage detection, fault indication and automatic shutdown on alarm

Test standards

• GB2423.1-2008 / IEC60068-2-1-2007
• GB/T 2423.2-2008
• GJB150.3A-2009
• GJB150.4A-2009
• GB2423.22-2008
• GBT 2424.5-2006
• GB/T 10589-2008
• GB/T 2423.3-2008 (IEC68-2-3)

Main technical parameters
Model examples | LFZ-CTHP100K20 / LFZ-CTHP150K20 / LFZ-CTHP225K20 / LFZ-CTHP408K20 / LFZ-CTHP800K20 / LFZ-CTHP1000K20 | LFZ-CTHP100K40 / LFZ-CTHP150K40 / LFZ-CTHP225K40 / LFZ-CTHP408K40 / LFZ-CTHP800K40 / LFZ-CTHP1000K40 | LFZ-CTHP100K70 / LFZ-CTHP150K70 / LFZ-CTHP225K70 / LFZ-CTHP408K70 / LFZ-CTHP800K70 / LFZ-CTHP1000K70
Temperature range | −20℃ ~ +150℃ | −40℃ ~ +150℃ | −70℃ ~ +150℃
Power (kW) examples by model | 5.5 / 5.5 / 10.5 / 14.2 / 23.0 / 23.0
Nominal internal volumes | 100 L / 150 L / 225 L / 408 L / 800 L / 1000 L
Inner chamber size (W×H×D) examples | 40×50×50 cm / 50×50×60 cm / 50×60×75 cm / 60×80×85 cm / 100×80×100 cm / 100×100×100 cm
Overall dimensions (W×H×D) examples | 60×108×138 cm / 70×108×148 cm / 70×118×163 cm / 80×138×173 cm / 120×118×190 cm / 120×138×190 cm
Power supply examples | 220 V (some models) / 380 V (other models)

Control & performance (common specifications)
Control precision / resolution: Temperature 0.01 ℃ resolution; Humidity 0.1% RH resolution
Typical performance (examples): Temperature deviation ±0.5 ℃; Humidity deviation ±2% RH; Temperature uniformity ≤ 2 ℃; Humidity uniformity ±3% RH; Temperature fluctuation ±0.5 ℃; Humidity fluctuation ±2% RH
Heating & cooling rates (examples): Heating −70℃ → +150℃ average ≥ 3 ℃/min; Cooling +150℃ → −70℃ average ≥ 1 ℃/min (rates depend on model/configuration)

System components (summary)
Compressor: imported models (e.g. Tecumseh); Refrigerant: R404A / R23; Blower: centrifugal forced circulation fan; Evaporator: finned tube heat exchanger; Condenser: air-cooled; Filter drier: removes moisture and contaminants; Humidifier: stainless steel; Heater: Nichrome element; Water tank: front-mounted with auto make-up; Controller: Weisheng (programmable), 7-inch color display; Communication: RS232/RS485, SD card logging, PC monitoring

Main spare parts (selection)

• Temperature Controller: Weishi (Taiwan)
• Refrigeration Compressor: Tecumseh (France) or equivalent
• Refrigeration Solenoid Valve: Japanese brand
• Oil Separator: Emerson (USA)
• Danfoss refrigeration components referenced
• Solid State Relay: local example
• Breaker: CHINT
• Intermediate Relay: Omron (Japan)
• Temperature & Humidity Sensor: Songyang (Taiwan)
• Heating / Humidification tubes and observation window suppliers
• AC Contactor, Overheat protector: CHINT
• Lockable castors, automatic make-up pump, circulation and cooling fans

Packing list (selection)
1 | Product certification | Qty 1
2 | User’s manual | Qty 1
3 | Warranty card | Qty 1
4 | Equipment certificate | Qty 1
5 | Electrical schematic | Qty 1
6 | Factory inspection report | Qty 1
7 | Monitoring software (CD/USB) | Qty 1 if provided
8 | Packing list | Qty 1
9 | Test sample holder tray | Qty 2
10 | Support rails/hooks for sample holder | Qty 8

Technical specifications

• Available temperature ranges: −20 ℃ to +150 ℃; −40 ℃ to +150 ℃; −70 ℃ to +150 ℃ (model dependent)
• Nominal internal volumes: 100 L, 150 L, 225 L, 408 L, 800 L, 1000 L
• Inner chamber material: SUS304 stainless steel; Outer: painted cold-rolled steel
• Control: programmable LCD, PID + FUZZY, multi-segment programming, RS232/RS485, USB/SD logging
• Humidity control: stainless-steel humidifier with internal heating and automatic water replenishment
• Refrigeration: imported compressors, eco refrigerants, air-cooled condenser
• Protections: overheat, fan overheat, phase loss/reverse, refrigeration overload/overpressure, leakage detection
• Observation: heated double-layer vacuum-strengthened glass
• Mobility: lockable PU castors
• Resolution & accuracy: Temperature 0.01 ℃ resolution; Humidity 0.1% RH resolution; Typical deviations: ±0.5 ℃ / ±2% RH
• Data & connectivity: SD card logging, RS232/485, PC curve display and printing