Overview

This document presents technical details and specifications for ESPEC's low temperature work operation chambers designed for simultaneous testing and specimen handling. These chambers maintain a stable temperature environment using an air curtain and are optimized for seated operation with features enhancing usability and specimen visibility.

Key Features and Utilities

• Air Curtain Technology: Prevents dew condensation on specimens and reduces temperature fluctuations when the door is partially opened by directing air flow down the door surface, minimizing outside air ingress.
• Temperature Uniformity: Achieves ±0.5℃ uniformity over a wide range from -40℃ to +85℃ (model WU-200), ensuring a stable test environment.
• Reach-in Port Guard: Optional accessory for low temperature testing that prevents outside air effects, enabling more rigorous testing.
• Dehumidifier Function: Automatically prevents dew condensation on specimens and inside the glass door during temperature transitions from low to high.
• All-Glass Power Sliding Door: Features double-layer glass with an air gap and heating element to prevent fogging, providing clear specimen visibility even at -40℃. The door slides vertically, can be locked at half-open (125mm) or fully open (380mm) positions, and includes safety features such as an emergency stop switch and photoelectric sensor.
• Compact Table Model Design: Dimensions of 750H × 750W × 440D mm allow seated operation, facilitating ease of specimen handling and extended test procedures.
• Space-Saving Ventilation: Top ventilation design eliminates rear space requirements and side protrusions, allowing parallel placement of instruments and easy mobility via casters.

Control and Operation

• Temperature Settings: User-friendly panel allows registration of up to three test temperature presets.
• Specimen Temperature Measurement: Standard thermocouple input terminal enables measurement and display of specimen surface or internal temperatures on the operation panel.
• Refrigerator Defrost Function: Facilitates easy defrosting with a 90-minute preset operation, controlling humidity rise and allowing selection of post-defrost mode (test restart or standby).
• Safety Functions: Multiple protections including specimen power supply control terminal that cuts power during errors, upper and lower temperature alarms, automatic overheat protection triggered at 10℃ above set temperature, independent overheat protector for the chamber, and various electrical safety devices.

Specifications

The chambers operate within a temperature range of -40℃ to +85℃ with temperature uniformity of ±0.5℃. The document includes detailed technical specifications such as dimensions, temperature control parameters, and electrical requirements (not fully extracted here due to formatting).

Safety Devices

• Leakage breaker for power supply
• Air circulator temperature switch
• Electrical compartment door switch
• Short circuit protection fuse for control circuit
• Reverse-prevention relay
• Circuit protector
• Refrigerator safety circuit including high-pressure switch, thermal relay, temperature switch
• Door motor overload shutoff circuit
• Door emergency stop switch
• Photoelectric sensor
• Overheat protector
• Thermal fuse
• Specimen power supply control terminal

Dimensions and Accessories

The chambers are compact table models with dimensions approximately 750 mm height, 750 mm width, and 440 mm depth. Accessories include reach-in port guard, connectors for specimen power supply and thermocouples, thermocouples (2m), cable port rubber plug, cartridge fuses, and user manual.

Options

• Portable paperless recorder with temperature range -50 to +100℃, 1 input channel expandable to 6, data saving cycle of 5 seconds, and CF memory card storage.
• Installed temperature recorder (100 mm, 6 dots)
• Overcool protector
• Thermocouples of various lengths (2m, 4m, 6m)
• Cable port rubber plug
• E-BUS cables (5m, 10m)

Summary of Critical Information

• Stable temperature environment maintained by air curtain technology to prevent dew and temperature fluctuations during specimen handling.
• High temperature uniformity (±0.5℃) over a broad range (-40 to +85℃).
• Safety features extensively integrated to protect specimens and equipment.
• Compact, user-friendly design enabling seated operation and easy specimen viewing.
• Multiple control and measurement functions including specimen temperature monitoring and defrosting capabilities.