Overview

This document provides a comprehensive technical overview of ESPEC's Bench-top Type Temperature and Humidity Chambers, designed for laboratory and personal use. These chambers combine compact size with high performance, offering precise control over temperature and humidity for diverse testing applications.

Product Lineup and Specifications

• Models and Capacity: 10 models available with capacities of 20L or 60L.
• Temperature Range: From -60°C up to +150°C depending on model.
• Humidity Range: 30% to 95% relative humidity (rh).
• Physical Dimensions: Compact footprint of 440W × 560H × 695D mm (excluding protrusions), weighing approximately 78 kg.
• Test Area: For 20L models, internal dimensions are 300W × 300H × 250D mm.

Key Features

Compact and High Performance

The SH-661 model exemplifies high performance with a wide temperature range (-60°C to +150°C) and humidity control (30% to 95% rh) in a compact design.

Eco-Friendly Design

• Energy-saving refrigeration system reduces energy consumption by up to 55% compared to previous models.
• Use of ozone-safe HFC refrigerants.
• Recyclable molded resin and metal parts are clearly marked to facilitate disassembly and recycling.

User-Friendly Features

• Front-side cartridge water supply tank with easy replenishment and optional additional water tank for extended operation.
• Optional right-opening door to fit installation constraints.
• Optional viewing window for specimen observation during testing, with size varying by model.
• Standard cable ports (25mm diameter) on both sides, with optional larger (50mm, 100mm) and flat-type ports.
• Flexible computer interfaces including standard RS-485 and optional RS-232C and GPIB ports.

Control and Operation

• Simple 9-key operation for setting temperature, humidity, and alarm limits.
• Programmable operation with up to 9 steps per pattern, including temperature and humidity gradients.
• Supports up to 99 repeat cycles and operational settings after program completion.

Additional Options

• Optional paperless recorder for temperature data logging on memory cards.
• Optional stands (L and H types) with casters for mobility and stacking; includes earthquake-resistant fittings for safety.
• Integration with ESPEC's Ion Migration Evaluation System for specialized testing.

Applications and Utility

These chambers are suitable for centralized environmental testing, data processing, and ion migration evaluation when connected with appropriate systems. Their wide temperature and humidity ranges in a bench-top format enable versatile testing environments.

Summary of Critical Parameters

Best Practices and Recommendations

• Secure optional stands to the floor using supplied earthquake-resistant fittings for enhanced safety.
• Utilize the optional paperless recorder for efficient and accurate data logging.
• Select models and capacities based on specific temperature and humidity requirements.
• Consider optional features such as viewing windows and right-opening doors to improve usability and observation.

Environmental and Safety Considerations

• Energy-efficient refrigeration reduces operational costs and environmental impact.
• Use of ozone-safe refrigerants complies with environmental protection standards.
• Clearly marked recyclable parts facilitate responsible disposal and recycling.

Temperature & Humidity Control Range and Controller

The chambers provide precise temperature and humidity control with a wide range. The controller supports constant or programmed operation with up to 9 steps per pattern and ramp time specification. Built-in alarms monitor upper temperature and humidity limits, sensor burnout, and include a watchdog timer for reliability.

Safety Devices

• Leakage breaker for power supply
• Thermal fuse
• Boil dry protector (SH models only)
• Short circuit protection fuse for control circuit
• Overheat and overcool protectors
• Air circulator temperature switch
• Specimen power supply control terminals
• Refrigerator overload relay and high pressure switch
• Inside chamber door switch
• Upper and lower temperature & humidity limit alarms
• Sensor burnout detection circuit
• Watchdog timer
• Refrigerator automatic delay circuit

Accessories

• Five shelves per model with load capacities of 500g (SH/SU-221, 241, 261) or 5kg (SH/SU-641, 661)
• Connectors for temperature & humidity recorders and signal terminals
• Cable port plugs and cartridge fuses
• Socket adaptor (for certain models)
• Wet-bulb wick, humidifying tray drain hose, water tank level sensor hose (SH models only)
• User's manual

Dimensions and Door Options

Viewing windows are available with dimensions varying by model. Doors can be configured as right or left hinged, with optional inner glass doors equipped with wipers for SH models to facilitate specimen observation.

Options and Additional Features

• Wet-bulb temperature detecting terminal (not for SU models)
• Temperature and temperature & humidity recorders with digital displays and multiple input channels
• Paperless recorders supporting CF memory cards and multilingual interfaces
• Stands (L and H types) for mobility and stacking; earthquake-resistant fittings recommended
• Auxiliary water tanks and automatic water supply circuits (SH models)
• Cable ports of various diameters with silicon sponge rubber plugs
• Auxiliary shelves and stainless steel mesh specimen baskets
• Computer interfaces including GPIB, RS-232C, and RS-485 options

Performance and Control

The chambers maintain stable internal environments with temperature uniformity of ±1.0℃ (–20 to +100℃) and ±1.5℃ (+100.1 to +150℃), and humidity uniformity of ±5.0% RH. Temperature heat-up and pull-down rates are specified with allowances for additional time depending on temperature range. PID control ensures automatic and precise regulation.

Safety and Reliability

Multiple protective features including overheat and overcool protectors, thermal fuses, automatic delay circuits, and electrical safety devices ensure user safety and equipment reliability.

Customization and Contact Information

Customization options are available to meet specific user requirements. Contact details for regional offices are provided for inquiries and support.