The Museum of HP Calculators

HP Forum Archive 02

 HP49G Unit ConversionMessage #1 Posted by Mike on 1 Mar 2000, 2:35 p.m. Does anyone know of a quick way to convert units on the HP49G? Under the HP48 series I could simply do the following: 1) select the UNITS key 2) select the catagory 3) enter the number-portion of the units to convert from followed by the convert-from unit soft-key. 4) press the left-shift key followed by the convert-to unit softkey to perform the conversion. Under the HP49G, steps 1-3 are similar. However after that I must do the following: 4) enter 1 (or any number) followed by the UNITS key, catagory key and then the convert-to unit (essentially 2 items are now on the stack). 5) Press right-shift/UNITS/TOOLS/CONVERT to perform the conversion. Hmmm?!?!?! Steps 4 and 5 for the HP49G seem to add conciderably to simply converting from one UNIT to another. Is there a shorter way? (Entering the UNITS objects by hand into the stack seems to me to be even more laborious). Thanks tons in advance! -Mike

 Re: HP49G Unit ConversionMessage #2 Posted by Erwin on 2 Mar 2000, 7:37 a.m.,in response to message #1 by Mike after you put the unit and its value to be converted on the stack,pres left-shift and the unit,from the menu, to wich you want it to convert.this ends the convertion. I hope it's clear.

 Re: HP49G Unit ConversionMessage #3 Posted by Mike on 8 Mar 2000, 5:19 p.m.,in response to message #2 by Erwin Thanks Erwin However, I'm not clear on what you've mentioned. I enter the following key-sequence from what I understand from your response... (let's convert 1 KNOT to MPH (miles/hr.) for example). 1) Place 1 onto stack 2) Right-shift then 6(Units key). In menu highlight 6(Speed) then F6(OK). In next menu highlight 6(Knot). Press F6(OK). 3) 1._knot is on the stack. 4) Where do I go from here (Exact keys to press)? I attempted to proceed as follows... A) Right-shift then 6(Units key again). In menu select 6(Speed again) then F6(OK). In next menu cursor-down to highlight 5. mph and then I left-shift followed by F6(OK). Hmmm?!?! Just beeps at me. Could you clarify with key-sequence perhaps? Thanks again tons Erwin. -Mike

 Re: HP49G Unit ConversionMessage #4 Posted by r. d. bärtschiger. on 9 Mar 2000, 1:28 p.m.,in response to message #3 by Mike Hi Mike, The proper sequence for converting units on the hp-49g & also the 48 series is as follows, press keys in exactly this order: Using your example of converting knots to mph. this assumes the calculator is in rpn mode. 1 right shift minus to place an underline after the one, (press * on 48) right shift 6 to access the units menu f6 for speed units, (press e on 48) f6 again, to place knot after 1_, (press f on 48) ENTER left shift mpg to convert to mph Hope this helps. rdb.

 Re: HP49G Unit ConversionMessage #5 Posted by Erwin on 9 Mar 2000, 6:24 p.m.,in response to message #4 by r. d. bärtschiger. Sorry for my unaccurate way of explaining how to convert on the 49. R.D. Bärtschiger did a better job,and it was close to what i meant. I read the first chapter of Mike’s mail d.d 03-01-2000,that state's how to convert on the 48. I performed it on the 49,and it work's. And need’s a few keystroke’s less then Bärtschiger’s methode. This is how i did it. Let's see how many gram there are in one kilogram. The calc has the stack (RPN mode) menu active now. Calc is in RPN. 1: press right-shift than units. Press next and choose mass,F1. 2: press Kg,F1. The beep sounds and the box 'Error Too Few Arguments' appears on the screen. Just press on/cancel and the box disappears, leaving 1._kg on the stack. 3: press left-shift,then choose g from the menu,F2. Kg is now converted to grams To convert 2 Kg to g: 1: press right-shift than units. Then press next and choose mass,F1. 2: press 2 than Kg,F1. 3: press left-shift than g,F2 (gram). It say's 2000._g on the stack. Erwin

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