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+--- Forum: Not quite HP Calculators - but related (/forum-8.html)
+--- Thread: How do you set to Double Precision mode for 34S? (/thread-7598.html)
How do you set to Double Precision mode for 34S? - zeno333 - 01-16-2017 02:10 AM
How do you set the 34S to Double Precision mode...I know its probably in the documentation, but cant seem to find it.
RE: How do you set to Double Precision mode for 34S? - Paul Dale - 01-16-2017 03:35 AM
In the MODE catalogue. Press D and you'll get to DBLOFF, you want DBLON which is immediately below.
Pauli
RE: How do you set to Double Precision mode for 34S? - zeno333 - 01-16-2017 04:15 AM
(01-16-2017 03:35 AM)Paul Dale Wrote: In the MODE catalogue. Press D and you'll get to DBLOFF, you want DBLON which is immediately below.
Pauli
OK, when you get there, how do you invoke that feature...?
RE: How do you set to Double Precision mode for 34S? - Dieter - 01-16-2017 06:46 AM
(01-16-2017 04:15 AM)zeno333 Wrote: OK, when you get there, how do you invoke that feature...?
As usual: press ENTER or XEQ.
Dieter
RE: How do you set to Double Precision mode for 34S? - Paul Dale - 01-16-2017 08:25 AM
Perhaps you need the manual
- Pauli
RE: How do you set to Double Precision mode for 34S? - Leonid - 01-16-2017 04:49 PM
BTW there is no way to programmatically displays the 18 trailing digits in DP mode?
RE: How do you set to Double Precision mode for 34S? - Paul Dale - 01-16-2017 09:37 PM
I'm sure a program could be written to display the extra digits:
To get the second 12 digits:
set round to zero mode,
round to 12 digits,
subtract from the original number.
Do this again to get the final 10 digits.
Pauli
RE: How do you set to Double Precision mode for 34S? - Dieter - 01-17-2017 08:36 PM
(01-16-2017 09:37 PM)Paul Dale Wrote: To get the second 12 digits:
set round to zero mode,
"Round to zero" is round mode 4, i.e. truncation (instead of the standard mode 0 that rounds to even).
The round mode is set by the RM command which is part of the MODE menu.
(01-16-2017 09:37 PM)Paul Dale Wrote: round to 12 digits,
Round to 12 significant digits. This is accomplished by the RSD command that can be found in the X.FCN menu.
(01-16-2017 09:37 PM)Paul Dale Wrote: subtract from the original number.
Yes. ;-)
So all in all it's a procedure like this:
Code:
RM 4 // set round mode to truncation
[SCI] 11 // always show 12 significant digits
17 [1/X] 5,88235294118 E-2 // 1/17 rounded 12-digit display precision
[ENTER] RSD 12 5,88235294117 E-2 // first 12 digits
[-] 6,47058823529 E-14
[ENTER] RSD 12 6,47058823529 E-14 // next 12 digits
[-] 4,11764705800 E-26 // last 10 digits
RM 0 // reset standard round modeDieter