GR-468-CORE for optoelectronic systems

Is test 5.20 thermal cycling or thermal shock?

5.20 states: "The procedure should agree with Method 1010 of MIL-STD 883C, with a minimum temperature ramp rate of 10°C/min.", which makes it sound like a chamber capable of only 10°C/min. is required. However, method 1010 is clearly an air-thermal shock test, requiring transfer between hot and cold conditions within one minute:

"3.1 Timing. The total transfer time from hot to cold or from cold to hot shall not exceed one minute. The load may be transferred when the worst case load temperature is within the limits specified in table I. However, the dwell time shall not be less than 10 minutes and the load shall reach the specified temperature within 15 minutes." (Mil-Std 883 method 1010.7)

Either way you read the test, the TSE-11-A is still your best choice for doing this test with the smallest chamber and least resources required.

Para- graph	Title	Description	Benchtop Models	Reach-in Models	Other Models
4.3.2	Reliability Thermal Shock Test	Liquid thermal shock, 0 to 100°C, per Mil-Std 883, method 1011			TSB, LTS1(2)-CHA
4.4.3 181.1	Screening	-40 to 70°C (or 85°C) , 20 cycles	TSE-11-A	Various Platinum models for 10°C/min.	TSA or ETS series
4.4.3 181.2	Screening	70°C or 85°C for 96 hours	Any benchtop or PH or PV ovens	Any Platinous or Platinum
5.18	Accelerated Aging	70°C or 85°C for 2,000 hours (optional 5,000 hours)	Any benchtop or PH or PV ovens	Any Platinous or Platinum
5.20	Temperature cycling	-40 to 70°C (or 85°C) per Mil-Std 883, method 1010 100 to 1,000 cycles	TSE-11-A	Various Platinum models for 10°C/min.	TSA or ETS series
5.21	Damp Heat	85°C / 85%RH for 1,000 hours or 50°C / 85%RH for 3,500 hours	SH or LH series	ESZ, ESX, or ENZ, ENX
5.2.3	Cyclic Moisture Resistance	25 to 75°C cycling with 85-95%RH. One -40°C cycle per 5 sub-cycles (Mil-Std 883, method 1004)	SH-241, SH-261, SH-641, or SH-661	ESX, or ENX