The Cincinnati Sub-Zero Z-8-1-H/AC is a compact environmental test chamber designed for precise temperature and humidity simulation across a broad operating range. With an 8 cu. ft. workspace and cascade refrigeration system, it delivers rapid thermal transients and steady-state stability of ±1°C, making it suitable for quality control, research, and development testing of smaller components and assemblies in space-constrained laboratories.
## Technical Specifications
**Thermal Performance**
• Temperature range: −70°C to +170°C
• Humidity range: 20% to 95% R.H.
• Temperature pulldown (cascade): −40°C in 20 minutes, −54°C in 30 minutes, −68°C in 45 minutes (from 23°C ambient)
• Temperature ramp-up: +93°C in 10 minutes, +190°C in 25 minutes (from 23°C ambient)
• Steady-state tolerance: ±1°C after stabilization
• Live load capacity: 800 W at −40°C; 500 W at −54°C
**Electrical**
• Supply: 208 V or 230 V, 60 Hz
• Single-phase: 25 A to 33 A full load
• Three-phase: 22 A to 23 A full load
• Performance rating based on 230 V, 60 Hz operation at 24°C ambient; water-cooled condenser recommended if ambient exceeds 30°C
**Physical Dimensions**
• Interior: 610 mm W × 610 mm D × 610 mm H (24 in. cube)
• Exterior: 889 mm W × 1300 mm D × 1960 mm H; accessory additions may increase dimensions
• Shipping weight (cascade models): 432 kg
**Refrigeration**
• Closed-loop cascade system; no periodic charging required
## Key Features
• 13.5″ H × 20.5″ W viewing window with interior lighting
• 70 mm access port for specimen feedthrough
• Heavy-duty casters with 3-inch wheels
• Shelf support provisions
• Refrigeration service taps for maintenance
• CSZ Dimension II Custom Logic Controller (Watlow F4 or equivalent)
• Communications port for integration
## Maintenance Requirements
• Humidity nozzle and filter: clean every 3 months or 500 operating hours
• Reservoir and pump screen: drain and clean every 2 months
