Specifications HP-42S battery compartment and the IR diode HP42S Calculator Internal Teardown As this calculator is regarded amongst the best ever made in terms of quality, key stroke feel, ease of programming, and daily usability for engineers, in the HP calculator community the 42S has become famous for its high prices in online auctions, up to several times its introduction price, which has created a scarcity for utility end users. Additionally, it features a two-line dot matrix display, which made stack manipulation easier to understand. The 42S, however, has a much smaller form factor than the 41, and features many more built-in functions, such as a matrix editor, complex number support, an equation solver, user-defined menus, and basic graphing capabilities (the 42S can draw graphs only by programs). Since it lacked expandability, and lacked any real I/O ability, both key features of the HP-41 series, it was marketed as an HP-15C replacement.
#HP 42S RPN SCIENTIFIC CALCULATOR WIKI SERIES#
Perhaps the HP-42S was to be released as a replacement for the aging HP-41 series as it is designed to be compatible with all programs written for the HP-41. It has advanced functions suitable for applications in mathematics, linear algebra, statistical analysis, computer science and others. The HP-42S RPN Scientific is a programmable RPN Scientific hand held calculator introduced by Hewlett-Packard in 1988. See followup message, seperate posting, on a revision level question.12 display digits (15 digits internally), exponent ±499ģ×1.5V button cell batteries (Panasonic LR44, Duracell PX76A/675A or Energizer 357/303) Thanks for the responses on the battery type. In response to message #5 by Thomas Okken Message #6 Posted by John Horak on, 10:21 a.m., I never had an HP-42S lose memory when I changed the batteries - this is with 3 different machines, including my current one (1993 model, rev. In response to message #4 by Karl Schneider Message #5 Posted by Thomas Okken on, 7:22 a.m., I also have a newer design 42S from 1992 whose batteries I haven't yet changed. My older-design 42S from 1989 recently survived a battery change with memory contents intact. HP-42S have a problem of not retaining the contents of memory during battery changes - maybe a bad batch of capacitors was used, I don't know. Silver oxide lasts longer but costs more. They are interchangeable, but it's best to use the same chemistry (alkaline or silver oxide). Luiz and John Limpert have given more details, but the simple answer is, three of any type 44, 76, or 357 cells. Message #4 Posted by Karl Schneider on, 3:28 a.m., Re: HP 42S - Battery Type and Constant Memory It's a silver oxide battery (lasts longer) and it has received good reviews. Message #3 Posted by John Limpert on, 2:24 a.m., Maybe some of these do not even exist, and even better models are available. In fact, these references are taken from the original HP15C Owner's Handbook, dated February 1984. For a higher current consumption (in case you plain to use the printer output constantly) you can try the Silver Oxide models: Eveready/UCAR 357, RAY-O-VAC RW42 OR 62, Duracell MS76, or others.
They are the same as the National/Panasonic LR44, Eveready/UCAR A76 OR RAY-O-VAC RW82 all alkaline. You can use the same ones designed fot the Voyagers (HP10C to HP16C).
#HP 42S RPN SCIENTIFIC CALCULATOR WIKI MANUAL#
What kind of batteries does the HP42S use? The owners manual just says it uses 3 button batteries, and the 42S I recently acquired came without batteries, and I want to make sure I get the right kind. Message #1 Posted by John Horak on, 12:53 a.m. HP 42S Battery Type The Museum of HP Calculators
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