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Orpat FX-100D Reviews

The Predecessor
Sep 11, 2002 07:30 PM 13038 Views

Well, those of you who have read one of my earlier reviews would surely know that I own a Casio calculator and definitely it is the best around. But before owning that masterpiece, I had an Indian Calci. Yes, I had an Orpat fx-100D and well, it stayed with me for just 6 months. Now, I would like to look into this calculator's features and share some experiences and help you decide on this. So read on.


When I joined my Engineering course, my seniors said that calculators are a must and so I went to the market and that shopkeeper foxed me really. He said that Orpat was the best brand around and somehow he made me buy Orpat fx-100D. Aha!! There started my journey with this Calci.


First of all the features looked really lucrative. I was drawn into it really.




  1. 10 digit LCD display for number and designated function.




  2. Storage of 6 operations and parenthesis up to 15 continuous levels.




  3. 8 digit mantissa and 2 digit exponent with signs.




  4. Independent accumulating memory.




  5. Binary, Octal and hexadecimal calculations.




  6. Mutual Conversion and calculation in arithmetic among binary, octal, decimal and hexadecimal.




  7. Complex number calculations.




  8. Logarithmic conversions.




  9. Squares and square roots.




  10. Auto power off after 7-8 minutes.






Now anybody would say that these features are really good. But in fact, they aren't.


The so-called 10 digit LCD display is unfortunately common for both input and output. So you are caught off-guard when you commit an error in manipulation. The basic fault lies in the fact that the Calculator doesn’t have a 2-tier display of both input and output. Coming to the 15 level parentheses, it is rather confusing for us to remember the number of brackets used because they are not displayed. A big let down. Well, the mantissa and exponent signs are very confusing. They might well lead you in the wrong direction.


Memory capacity is very poor. You can in no way store 4 or 5 numbers simultaneously. I don't know, what it means by independent accumulating memory. Above all, the poorest aspect of this calculator, is the binary, octal and hexadecimal conversional calculations. Never have I found the correct conversion. Somehow, the usage of keys for manipulation in unconventional. Mutual conversions like polar to rectangular are not possible directly. This is rather irritating.


Though this calculator has more functions like complex numbers up its sleeve, it looses on many a count. The keys, are very fragile and easily breakable. More so, they are not case sensitive. Definitely, they'll let you down in crunch situations. Here I should share an experience of mine.


It was my Physics Test and I had to carry Orpat for calculations. Man, I had a bad time. I am just not getting the correct answers in powers. And when I try to store multiple numbers, it just won’t store. Hmm, thank goodness, there was my friend who had a Casio. I was saved.


So, the keys are not good. Memory is very much insufficient. Functions are not lucrative performance wise. The display is the poorest you can find. You might ask as to what else it can lack. Well here we go again.


The calculator doesn’t convince me in standard deviation calculations. And the calculator case!! My goodness. It is pathetic. You drop the Calci once and yeah! You should forget it. Such is the fragility.


Working on a AA size batty, this calculator is not worthy at all. It is better if it occupies the comforts of a shopkeeper's showcase rather than with you. Well, if you still can’t believe me, I can always give mine to you and you'll find the difference. While the Casio fx-82TL is an Engineering student's dream, the Orpat fx-100D is his worst nightmare. Hence, I don’t recommend this product to anybody, come what may.


Orpat Fx 100D - Average performer
Feb 08, 2001 05:04 PM 12380 Views

Orpat scientific calculator Fx-100D is similar to the Fx series of Casio. The difference being Orpat is manufactured in India (by makers of Ajanta Clocks). It is a handy model and moderately priced. I've found the calculator electronics quite good. The calculator still works well despite many instances of careless handling by me. That ends the plus points! There is only one scientific model to choose from - so take it or leave it..The case design leaves a lot to be desired. The flip top cover permanently gets 'flipped off' after few operations leaving one irritated. Reasons could be bad plastic or workmanship or design.


The product though priced reasonably, suffers from stiff competition from Casio (Japanese giant) who offer better quality products (even though sourcing / assembling from Malaysia, China etc.)


In any case the product on the whole is average


Its real cheap both pricewise and performance wise
Jan 11, 2001 09:45 PM 13912 Views

U know when you need a scientific calculator ...u guessed it right when you get into an engineering college most probably CALCULATOR FX 100 series are a must there ..then the question is what to buy ..CASIO or ORPAT one is three times expensive than their ORPAT counter part well I have used both and interestingly ORPAT was very easy to operate and Cheap (at 1996 I bought it at Rs.325 when I got through JEE and was admitted to IIT Kanpur for B.Tech now its even more cheap Rs.225 and may be there some improvements). But I remember it (ORPAT fx 100 D did not lasted with me for more than six to eight months its Cover was broken or infact came out from its assembly within 4-5 days and I used to get scolded when ever my DAD saw the condition of my calculator ..i was blamed for careless-ness but no I was not really that care less the fact was the design of this Calculator was really cheap.And on technical point of view it has only one memory as compared to 10 of CASIO fx100s and the Complex Numbers mode feature really sucks you can not Divide two Complex numbers by ORPAT fx100d while you can multiply two complex numbers is not that a bug in the embedded software in the Chip of ORPAT Fx 100D, Besides that there are some good parts also about ORPAT fx 100 d that it is most easy to use user friedly you can easily locate the functions on KeyPad clean simple key pad while in CASIO fx100s you will make a mess of things searching for the particular function. Hence I would recommend ORPAT fx100d for beginners who are a bit more carefull about handling their tools.If we look at the PRICE tag then sure we can ignore the some functional disabilities of ORPAT fx 100 d as usually Indians are habitual of Compromising for Quality for the cause of economy.


SO IN SUMMARY I WOULD SAY ...




  1. if You are a serious users go for something more that just ORPAT fx 100 d ...may be CASIO series




  2. If you are beginner ..and plan to do stuff not involving very Complex Calculations ORPAT is Just fine and really Cheap ...but make sure you handle it carefully.




  3. Decide by the criteria






COST--> Do buy ORPAT


QUALITY and Functionality---->Don't buy ORPAT fx 100-d


For those who are going for engineering education I would say that they will be able to do most of the things by ORPAT but surely at some point of time they will realise that this does not have that functions like Statistical and Permutations and Combinations while its has a factorial function for your rescue.


so make a wise choice depending upon your requirement ...


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