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A Tutorial

by Lloyd W. Condra, Hanse Environmental, Inc.

Environmental stress screening (ESS) is one of the most widely used of all accelerated reliability tests. It precipitates latent defects, which are detectable only with the application of stress. Latent defects are introduced into the product during manufacturing, since design-related defects should have been detected and eliminated by reliability-enhancement testing during the design phase.

Since the early 1980's there has been much discussion regarding various approaches and methods in the use of environmental stress screening and Halt/HASS to markedly improve product quality and life.  Unfortunately, there was widespread misunderstanding and misapplication of the methodology . . . . and some still remains.  Accordingly, we have listed the "Seven Deadly Sins of HALT/HASS". 

 

The Problem

The short lifecycle of today's electronic products creates many pressures for rapid development and manufacture of new products, or product upgrades, in order to stay ahead in the competitive market place. Take for instance, the short model life of computers and printers. A new model appears every few months. Time-to-market is short, and customers expect the new models to work "out of the box" each and every time.

These pressures can result in compromised product development and/or manufacturing problems caused by part, process, and workmanship defects. The result is increased manufacturing costs, warranty costs, impacted profit margins, and sadly worse, customer dissatisfaction with resulting loss of market share. 

System Description

The humidification systems provided with Hanse Environmental, Inc. chambers utilize the latest in ultrasonic nebulization principles to generate the moisture required in the chamber. The ultrasonic nozzle uses air and water under pressure. Atomized water leaving the nozzle is hit by the air reflected by the resonator as sound waves.  It is then nebulized into very small particles, like a fog, and rapidly absorbed by the air. The resonator is adjusted at the factory for maximum atomization and proper fog pattern. The fog pattern can be narrowed by moving the resonator further from the nozzle tip, and conversely, widened by moving the resonator closer to the tip.

The water used in the humidification system can be demineralized by the optional  D.I. bottle. In addition, a water quality light is included to monitor the quality of the water generated by the D.I. bottle. The D.I. bottles are a mixture of bed resin that contains positive and negative charged resins.  These resins remove the minerals from the water. The D.I. bottle supplied with the Hanse Chamber is a 1 cubic foot bottle.

For our customers with HanseView,  you may now get your updates through our website.

We like to keep our customers running the most current version of HanseView. This will avoid any known problems that have already been resolved in new versions.

After you receve your login info, go to the downloads area and navigate to HanseView. Download the compressed file, execute, and update. Please read installation notes before updating, as features have been added that need configuration.

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Halt ChamberIf you are looking for your user manuals and support documents for your chamber, look no further than our website!  We have been digitizing user manuals for both our chambers and their components. Below are a few links to them which can be found in our download section:

Read more to view all files currently available.

Overview

HanseView allow for remote control through text files. This can be done on local computer or via file sharing. Basic concept is that a command written to a text file is read by HanseView then executed and output placed to a text file.

This remote control capability allows for test stand integration. You can then use 1 of two models. Have test stand send set point commands or profile start stop commands to control chamber then read back current status. Other option is to have test stand read only status and react to conditions and time to perform necessary equipment test.

English System Comparision Chart

Model Size (in) Pipe Size (in) Specifications Total
V 1 12" X 12" 3/8" Number of Med Vibrators 2
Number of Large Vibrators 0
Number of Inserts 9
Table Weight (Lbs) 30
Total Vibrators Weight (Lbs) 9
Total Weight (LBS) 39
Total Load Capacity (Lbs) 100
Total Load Modified (Lbs) 150
Total SCFM 10.4
V 1.5 20" X 20" Number of Med Vibrators 3
Number of Large Vibrators 0
Number of Inserts 16
Table Weight (Lbs) 71
Total Vibrators Weight (Lbs) 13.5
Total Weight (LBS) 84.5
Total Load Capacity (Lbs) 250
Total Load Modified (Lbs) 500
Total SCFM 15.6
V 4 24" X 24" 3/4" Number of Med Vibrators 2
Number of Large Vibrators 2
Number of Inserts 20
Table Weight (Lbs) 103
Total Vibrators Weight (Lbs) 27
Total Weight (LBS) 130
Total Load Capacity (Lbs) 700
Total Load Modified (Lbs) 1000
Total SCFM 34.4
V 6.25 30" X 30" Number of Med Vibrators 3
Number of Large Vibrators 2
Number of Inserts 24
Table Weight (Lbs) 165
Total Vibrators Weight (Lbs) 31.5
Total Weight (LBS) 196.5
Total Load Capacity (Lbs) 700
Total Load Modified (Lbs) 1000
Total SCFM 39.6
V 9 36" X 36" Number of Med Vibrators 5
Number of Large Vibrators 4
Number of Inserts 64
Table Weight (Lbs) 230
Total Vibrators Weight (Lbs) 58.5
Total Weight (LBS) 288.5
Total Load Capacity (Lbs) 700
Total Load Modified (Lbs) 1000
Total SCFM 74
V 16 48" X 48" Number of Med Vibrators 4
Number of Large Vibrators 4
Number of Inserts 121
Table Weight (Lbs) 400
Total Vibrators Weight (Lbs) 54
Total Weight (LBS) 454
Total Load Capacity (Lbs) 500
Total Load Modified (Lbs) 1000
Total SCFM 68.8
V 16 HIGH 1" Number of Med Vibrators 8
Number of Large Vibrators 8
Number of Inserts 121
Table Weight (Lbs) 400
Total Vibrators Weight (Lbs) 108
Total Weight (LBS) 508
Total Load Capacity (Lbs) 500
Total Load Modified (Lbs) 1000
Total SCFM 137.6
V 25 60" X 60" Number of Med Vibrators 6
Number of Large Vibrators 6
Number of Inserts 196
Table Weight (Lbs) 625
Total Vibrators Weight (Lbs) 81
Total Weight (LBS) 706
Total Load Capacity (Lbs) 500
Total Load Modified (Lbs) 1000
Total SCFM 103.2
V25 HIGH 1-1/4" Number of Med Vibrators 12
Number of Large Vibrators 12
Number of Inserts 196
Table Weight (Lbs) 625
Total Vibrators Weight (Lbs) 162
Total Weight (LBS) 787
Total Load Capacity (Lbs) 500
Total Load Modified (Lbs) 1000
Total SCFM 206.4

Metric System Comparision Chart

Model Size (cm) Pipe Size (in) Specifications Total
V 1 30 X 30 3/8" Number of Med Vibrators 2
Number of Large Vibrators 0
Number of Inserts 9
Mass of Table (Kg) 13.61
Mass of Vibrators (Kg) 4.08
Total Mass (Kg) 17.69
Load Capacity (Kg) 45.36
Load Capacity Modified (Kg) 68.04
Total SCMM 0.29
V 1.5 51 X 51 Number of Med Vibrators 3
Number of Large Vibrators 0
Number of Inserts 9
Mass of Table (Kg) 32.21
Mass of Vibrators (Kg) 6.12
Total Mass (Kg) 38.33
Load Capacity (Kg) 113.40
Load Capacity Modified (Kg) 223.80
Total SCMM 0.44
V 4 61 X 61 3/4" Number of Med Vibrators 2
Number of Large Vibrators 2
Number of Inserts 16
Mass of Table (Kg) 46.72
Mass of Vibrators (Kg) 12.25
Total Mass (Kg) 58.97
Load Capacity (Kg) 317.51
Load Capacity Modified (Kg) 453.59
Total SCMM 0.97
V 6.25 76 X 76 Number of Med Vibrators 3
Number of Large Vibrators 2
Number of Inserts 24
Mass of Table (Kg) 74.84
Mass of Vibrators (Kg) 14.29
Total Mass (Kg) 89.13
Load Capacity (Kg) 317.51
Load Capacity Modified (Kg) 453.59
Total SCMM 1.12
V 9 91 X 91 Number of Med Vibrators 5
Number of Large Vibrators 4
Number of Inserts 49
Mass of Table (Kg) 104.33
Mass of Vibrators (Kg) 26.54
Total Mass (Kg) 130.86
Load Capacity (Kg) 317.51
Load Capacity Modified (Kg) 453.59
Total SCMM 2.10
V 16 122 X 122 Number of Med Vibrators 4
Number of Large Vibrators 4
Number of Inserts 100
Mass of Table (Kg) 181.44
Mass of Vibrators (Kg) 24.49
Total Mass (Kg) 205.93
Load Capacity (Kg) 226.80
Load Capacity Modified (Kg) 453.59
Total SCMM 1.95
V 16 HIGH 1" Number of Med Vibrators 8
Number of Large Vibrators 8
Number of Inserts 100
Mass of Table (Kg) 181.44
Mass of Vibrators (Kg) 48.99
Total Mass (Kg) 230.42
Load Capacity (Kg) 226.80
Load Capacity Modified (Kg) 453.59
Total SCMM 3.90
V 25 152 X 152 Number of Med Vibrators 6
Number of Large Vibrators 6
Number of Inserts 169
Mass of Table (Kg) 283.50
Mass of Vibrators (Kg) 36.74
Total Mass (Kg) 320.24
Load Capacity (Kg) 226.80
Load Capacity Modified (Kg) 453.59
Total SCMM 2.92
V25 HIGH 1-1/4" Number of Med Vibrators 12
Number of Large Vibrators 12
Number of Inserts 169
Mass of Table (Kg) 283.50
Mass of Vibrators (Kg) 73.48
Total Mass (Kg) 356.97
Load Capacity (Kg) 226.80
Load Capacity Modified (Kg) 453.59
Total SCMM 5.84

 

SEVEN QUESTIONS

You Should Ask Before You Decide To Buy

Your HALT/HASS System . . .

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