2009 Espec TSB-21 Liquid to Liquid Thermal Shock Chamber

The Espec TSB-21 is a liquid-to-liquid thermal shock chamber designed to perform rapid temperature change testing on electronic components and other specimens. The unit uses a specialized test fluid (e.g., Galden D02-TS) instead of air for faster heat transfer. 

Key Specifications

Type: Liquid-to-liquid thermal shock

Chamber Interior volume 0.08 cu. ft. (2.1 Liters)

Interior Dimensions (W x D x H) 4.7" x 4.7" x 5.9" (120 x 120 x 150 mm)

Temperature Range (Hot Bath) +70°C to +200°C (+158°F to +392°F)

Temperature Range (Cold Bath) -65°C to 0°C (-85°F to +32°F)

Specimen Transfer Time: Within 10 seconds (between baths)

Max Specimen Weight 1.0 kg (2.2 lbs)

Electrical Requirements 3-phase, 200V-220VAC, 50/60Hz, 25A

Air Requirements: 0.4-0.7 MPa (58-101PSI), Flow:15l/min

External Dimensions (L x W x H) Approx. 52" x 57" x 72"

Weight Approx. 1480 lbs (671 kg)

Performance Details

• Temperature Fluctuation: ±2°C in both hot and cold baths.
• Heat-up Rate (Hot Bath): Ambient to +150°C within 90 minutes.
• Pull-down Rate (Cold Bath): Ambient to -65°C within 120 minutes.
• Typical Test Conditions (MIL-STD 883 1011.9): -65°C to 150°C range with 10-second recovery time using a 2 lb load of IC chips.
• Construction: The internal tank is made of stainless steel plate (18-8 Cr-Ni) with glass wool and polyurethane foam insulation. 

Key Feature Diagram Components

Based on technical specifications, a diagram of the TSB-21 features includes the following primary sections: 

• Vapor Recovery Unit: Located at the top of the transfer area to significantly reduce fluid loss by condensing evaporated thermal fluid and returning it to the baths.
• Automatic Shutters: These are positioned at bath inlets to limit evaporation and maintain temperature stability during the transfer process.
• Specimen Basket Transfer: A vertical air cylinder system that moves samples (up to 1.0 kg) between baths in less than 10 seconds with minimal vibration.
• Thermal Baths: Two separate tanks (Hot and Cold) filled with brine (typically Galden or Fluorinert).
• Control Panel: Features a 6.5-inch color LCD touch-screen controller for managing test patterns and monitoring real-time trend graphs.

Test Standards

MIL-STD-883E (Method No. 1011.9) Test Conditions A,B,C

MIL-STD-202G (Method No. 107G) Test Conditions A,B,C

JIS C 0025