The Museum of HP Calculators

HP Forum Archive 17

 HP48GX units problemMessage #1 Posted by Noël Cotter on 1 Aug 2007, 8:14 a.m. If on my HP48GX I do the following: 1000 Hz 1E-6 F * INV ¡ç §Ù I get 1000_§Ù Where as the correct answer is: (0,-159.154943092)_ §Ù First, it¡¯s obvious the calculator has not made the conversion from Hz to radians/sec. Next, if I type: (0,2) §Ù I get an error message ¡°Bad Argument Type¡± so apparently the units cannot be appended to a complex number. But 1 / (1 Hz * 1 F) does NOT equal 1 §Ù even if we neglect signs or complex numbers.

 Re: HP48GX units problemMessage #2 Posted by bill platt on 1 Aug 2007, 9:49 a.m.,in response to message #1 by Noël Cotter This might be worth a search through archives of comp.sys.hp48

 Re: HP48GX units problemMessage #3 Posted by Noël Cotter on 1 Aug 2007, 5:36 p.m.,in response to message #1 by Noël Cotter I see that the text was garbled when I posted it. I'll try editing it in and see if it will make more sense. If on my HP48GX I do the following: 1000 Hz 1E-6 F * INV I get: 1000_Ohm (Ohm symbol does not post correctly) Where as the correct answer is: (0,-159.154943092)_Ohm First, it's obvious the calculator has not made the conversion from Hz to radians/sec. Next, if I type: 0,2) Ohm I get an error message, "Bad Argument Type", so apparently the units cannot be appended to a complex number. But 1 / (1 Hz * 1 F) does NOT equal 1 Ohm even if we neglect signs or complex numbers. There, that makes a little more sense. Edited: 1 Aug 2007, 5:41 p.m.

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