![]() ![]() I was so saddened when HP discontinued the model (the end of a great era). I have used other machines, but this one is truly "the pinnacle of pocket calculator excellence" as another author once wrote. The complex number handling was a dream come true, and this hp great is very easy to program. It is equipped with anything a working electrical engineer (or any other engineer) needs. I bought my first as a senior in college after reading an add which stated that the hp 42S RPN scientific calculator was "engineered for the engineer." And I can say the it truly is. ![]() I continually marvel over this truly magnificient machine. This is the ULTIMATE ONE!!!!!Īn God said, "Let there be the hp 42S." The handling of complex numbers is top notch, and the unit is very easy to program with enough memory to tackle the toughest problems. This vintage (and still quite relevant unit) represents everything that made HP calculators the go to units for REAL Engineers and Scientists. No other manufacturer (TI, Casio, etc.) has produced anything close. This machine is a marvel and easily the best scientific calculator ever made. I would like to have a working unit all the days of my life. Verified purchase: Yes | Condition: Pre-ownedĪn God said, "Let there be the hp 42S." - CONTINUED.īought another one. Yet, they still won't do it! Read full review We've told HP what we want and that we're willing to pay for it. Judging by the high prices HP calculators prior to 2001 fetch on eBay, I'd say many others feel the same about HP now. HP no longer deserves to be associated with quality. I don't expect HP to ever make a quality calculator again. I've asked HP's new President & CEO Dion Weisler to do just that, but I'm not holding my breath. Personally, I'd like to see an HP 15cii and an HP 42sii. In my opinion, the best scientific programmable calculators that HP ever made are the HP 67, HP 15c, HP 32sii and the HP 42s (although I'm very fond of the HP 29c and HP 34c) The best of the bunch I'd have to say is the HP 42s. HP must have read them too and obviously doesn't care any more. If you'll read the reviews on eBay, Amazon and HP's own public reviews you' ll notice that Kinpo's calculators aren't as good as the one's HP used to make. Kinpo made the HP 33s and the current HP 35s calculators. Since then, Kinpo Electronics of China has been making scientific programmable calculators and HP has been putting their name on it. Many scientists and engineers use this calculator today, 25 years after its introduction."Īround the turn of the century, HP terminated its' calculator development team and decided to reduce the quality of its' calculators. "This calculator is often regarded as the best ever made in terms of quality, key stroke feel, ease of programming, and daily usability for engineers. It is just type what you want and press the desired function key.The second to last Scientific Programmable RPN calculator HP made. Anyway there is another way to enter data in RPN. In my opinion we could have a simpler RPN style. This is a feature, a bad feature I think, of the HP RPN style of 42S (also in 33S, 12C, etc but not in HP48 or 49). So if you do 2 ENTER + you will have 4 as answer. iv)The content just entered goes to line y and line x. iii)The content of line x goes to line z. ii) The content of line y goes to line t. I) The content of lines t and z are lost. When you enter a number (say 2 ENTER) what happens is the following. ![]() So the stack is something likeīut as the calculators display has only two lines just x and y lines are visible. (actually the name of the last two is not so important). There are four lines labeled x, y, z and t. But in other models like 32SII, 33S (in RPN mode) and 42S the input data have to fit in a “stack” of four lines. In some models like HP-48 or HP-49 the amount of input data is limited only by available memory. In algebraic calculators the “( )” are limited to a given number depending on the model. No calculator can store an infinite amount of data. We will discuss the others menus later too. The MODES menu has another line but we will discuss this later. We will see this more in detail when study complex numbers. REC actives rectangular mode (x,y) and POLAR actives polar mode (r,θ). Why the result is not exactly zero? Answer: Because the number that calculator entered was not exactly π but 3.14159265359. GRAD is not so useful and correspond to 400 degrains for a circumference.įor example: In degrees we have sin(90°)=1 and in radians we have sin(π/2)=1. RAD actives radian mode and in this mode a circumference has 2π radians or just 2π. In this mode a circumference has 360 degrees. (MODES is above +/- key).ĭEG actives degree mode for trigonometric functions. Here, in this manual, I suppose the calculator using '.' for decimal point. Again the active mode is followed by a ■ sing. Make the calculator to use ',' for decimal point and by pressing RDX. ![]()
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