Personally I believe that calibration requirements are all based on application and use. You have to evaluate the cost of failure vs the cost of calibration. I am sure many have seen this already but this is a great Navy video on the importance of calibration [1]http://www.youtube.com/watch?v=yxZBNYBoLLU Best regards, Benjamin Sheena IET Labs --- In [2]GenRad@yahoogroups.com, Roy Morgan wrote: > > > On Jun 6, 2012, at 4:10 PM, jackinnj wrote: > > > > > Nope, Thaler Corporation -- used to be in Tucson AZ -- they produced > > the VRE105 Precision Reference. > > > > Thaler Corp > 2015 N Forbes Blvd > Tucson AZ 85745-1458 > > Tel: 520-882-4000 > > The design and performance of a precision voltage reference ... > <[3]http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiterature Number=slyt168&fileType=pdf&track=no > > > By Perry Miller, Application Specialist--Data Converters, Texas > Instruments, Dallas and Doug Moore, Managing Director, Thaler Corp., > Tucson, Arizona ... > > "The first paper on this topic appeared in the November > 1999 issue of Analog Applications Journal > (www-s.ti.com/sc/techlit/slyt183). It introduced the VRE3050 > precision voltage reference and described the criteria for > selecting a reference for data converters that operate over > the industrial temperature range and the importance of the > external voltage reference for high-resolution data converters > in general. > ..." > > > > Roy Morgan > k1lky@... > K1LKY Since 1958 - Keep 'em Glowing! > __._,_.___ [4]Reply to sender | [5]Reply to group | [6]Reply via web post | [7]Start a New Topic [8]Messages in this topic (24) Recent Activity: * [9]New Photos 4 [10]Visit Your Group [11]Yahoo! Groups Switch to: [12]Text-Only, [13]Daily Digest o [14]Unsubscribe o [15]Terms of Use . [nc3=3848586] __,_._,___ References 1. http://www.youtube.com/watch?v=yxZBNYBoLLU 2. mailto:GenRad%40yahoogroups.com 3. http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=slyt168&fileType=pdf&track=no 4. mailto:bsheena@gmail.com?subject=Re%3A%20Callibration 5. mailto:GenRad@yahoogroups.com?subject=Re%3A%20Callibration 6. http://groups.yahoo.com/group/GenRad/post;_ylc=X3oDMTJxY3E5NDIzBF9TAzk3MzU5NzE0BGdycElkAzIxNTI5Nzk0BGdycHNwSWQDMTcwNTA4MzI3OARtc2dJZAMxNjgzBHNlYwNmdHIEc2xrA3JwbHkEc3RpbWUDMTMzOTA3NDgwNw--?act=reply&messageNum=1683 7. http://groups.yahoo.com/group/GenRad/post;_ylc=X3oDMTJmOTYzbGJjBF9TAzk3MzU5NzE0BGdycElkAzIxNTI5Nzk0BGdycHNwSWQDMTcwNTA4MzI3OARzZWMDZnRyBHNsawNudHBjBHN0aW1lAzEzMzkwNzQ4MDc- 8. http://groups.yahoo.com/group/GenRad/message/1660;_ylc=X3oDMTM1YWsyMW5oBF9TAzk3MzU5NzE0BGdycElkAzIxNTI5Nzk0BGdycHNwSWQDMTcwNTA4MzI3OARtc2dJZAMxNjgzBHNlYwNmdHIEc2xrA3Z0cGMEc3RpbWUDMTMzOTA3NDgwNwR0cGNJZAMxNjYw 9. http://groups.yahoo.com/group/GenRad/spnew;_ylc=X3oDMTJnNW9rNDZqBF9TAzk3MzU5NzE0BGdycElkAzIxNTI5Nzk0BGdycHNwSWQDMTcwNTA4MzI3OARzZWMDdnRsBHNsawN2cGhvdARzdGltZQMxMzM5MDc0ODA3 10. http://groups.yahoo.com/group/GenRad;_ylc=X3oDMTJmNm1vNnE3BF9TAzk3MzU5NzE0BGdycElkAzIxNTI5Nzk0BGdycHNwSWQDMTcwNTA4MzI3OARzZWMDdnRsBHNsawN2Z2hwBHN0aW1lAzEzMzkwNzQ4MDc- 11. http://groups.yahoo.com/;_ylc=X3oDMTJlcGRzcTZwBF9TAzk3MzU5NzE0BGdycElkAzIxNTI5Nzk0BGdycHNwSWQDMTcwNTA4MzI3OARzZWMDZnRyBHNsawNnZnAEc3RpbWUDMTMzOTA3NDgwNw-- 12. mailto:GenRad-traditional@yahoogroups.com?subject=Change%20Delivery%20Format:%20Traditional 13. mailto:GenRad-digest@yahoogroups.com?subject=Email%20Delivery:%20Digest 14. mailto:GenRad-unsubscribe@yahoogroups.com?subject=Unsubscribe 15. http://docs.yahoo.com/info/terms/