|Re: HP-28S Clock Accuracy|
Message #3 Posted by Juan J on 21 Mar 2006, 9:22 a.m.,
in response to message #2 by Eric Smith
Thank you for your explanation.
When you also consider that neither the HP-28C nor the HP-28S were specifically design with timekeeping in mind, and that the documentation on how to access the internal clock was only released as an afterthought, I think you should be quite happy with how well they work.
Indeed I am happy with the clock application of the HP-28S. It is a testament to the quality of HP. My concern was rather curiosity on how well the clock performed, and it is impressive how well it does. I am amlso surprised by the battery life. According to the manual, alkaline batteries would last 180 days on an HP-41, and about the same time in an HP-28S. I have seen 41s going on the same battery set for three years of sustained use (not including the card reader) and now almost the same time for the 28S. An HP-48GII is expected to drain its batteries in two months, as per specifications; I have no idea of the figure for a 49G+ Again, HP did know how to build fine instruments.
I remember I was concerned about the hinge contacts of the Clamshells when I got the first 28S. Time has proved me wrong.
Assuming that the storage was not temperature controlled, that's actually quite good.
Yes, they were stored in a friend's warehouse without temperature control.
The 28S is powerful and handy when you get used to the keyboard layout. No Alpha toggle to deal with, just typing in the object name. I think it was conceived for use at a flat surface (like a desk or a table) only, and for quick calculations away from it (and folded as the manual suggests for "field use")