WP 34S Displayformat

[smtschmidt]

My prefered notification is ALL 2 and ENGOVR. Up to 2 zeros can appear after the decimal mark before the display switches to engineering notation.

It works perfectly with irrationional numbers but i think it doesn't work with short rational numbers:
5 1/x > 0,2
10 / > 0,02
10 / > 0,002
10 / > 0,0002
and so on up to 10 zeros after the decimal mark.

Is this a bug or a feature?

Many thanks in advance,
Michael

[Pascal]

(06-05-2015 08:47 AM)smtschmidt Wrote:  Is this a bug or a feature?

Hi,

I think it is a feature. Look at the green manual, p.72: ALL displays all digits as long as they fit the display width; it will switch to SCI (or ENG) only to avoid flowing over the display limits. With your number, no flowing happens.

Best regards,

Pascal

[smtschmidt]

Hi Pascal,
sorry, I am a relative new user of HP-calculators. I brought a HP-50g three years ago and I'm not so happy with it. One reason is the circumstantial change of the display-mode. I am an electrical engineer and i'll never use a number like 0,002. On the HP-50g I have always to switch the mode manualy. Annoying!

So I was very interested in the WP 34S cause I read in the beginner guide about ALL n, ENGOVR and DISP n.
When I get it right, I have to type ALL 0 on the WP34S to get the same as with ALL in the HP-42S. But the ALL n (n>0) should allow n-1 zeros on the right side of the radix-mark.

I am not sure, but thats how I interpret the manuals.

kind regards
Michael

[Dieter]

(06-05-2015 10:51 AM)smtschmidt Wrote:  When I get it right, I have to type ALL 0 on the WP34S to get the same as with ALL in the HP-42S.

Right. 1/3 is then displayed as 3,33333333333 E–1.

(06-05-2015 10:51 AM)smtschmidt Wrote:  But the ALL n (n>0) should allow n-1 zeros on the right side of the radix-mark.

That's the way it works, yes.

There are two simple rules for ALL n:
1. If the number fits the display completely and a switch to scientific notation is not required, show it in FIX mode.
2. If the number does not fit the display AND it is less than 10^–n, the display switches to SCI (or ENG if ENGOVR is set).

If I get you right, you want the SCI/ENG switch for ANY number that is below a certain threshold, e.g. below 0,01. So that for instance 0,00012345 is displayed as 1,2345 E–4 (or 123,45 E–6) although it would fit the display in FIX mode. I do not know how this could be accomplished.

Dieter

[smtschmidt]

Hi Dieter,
thanks for your explanation.

Quote:2. If the number does not fit the display AND it is less than 10^–n, the display switches to SCI (or ENG if ENGOVR is set).

I didnt get the AND. My fault.

Quote:If I get you right, you want the SCI/ENG switch for ANY number that is below a certain threshold, e.g. below 0,01. So that for instance 0,00012345 is displayed as 1,2345 E–4 (or 123,45 E–6) although it would fit the display in FIX mode. I do not know how this could be accomplished.

Yes, that's what I want. My TI57 did it 35 years ago and I think every Casio or Sharp do so. When my students present me a result of 0,0001234kg or somethink like 1,45 * 10^0 meter, they are kidding me.

I can't believe it!
Michael

[Dieter]

(06-05-2015 01:59 PM)smtschmidt Wrote:  Yes, that's what I want. My TI57 did it 35 years ago and I think every Casio or Sharp do so.

Are you sure? So 10^–6 is displayed as 1 E–6 and not 0,000001 ?

(06-05-2015 01:59 PM)smtschmidt Wrote:  When my students present me a result of 0,0001234kg or somethink like 1,45 * 10^0 meter, they are kidding me.

That's not the calculator's fault. #-)
Obviously there are some basics that you cannot expect (today).

Dieter