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public:calculator:info:dm41x_info [27/01/26 13:37 GMT] – [RTC Error] johnpublic:calculator:info:dm41x_info [01/02/26 08:36 GMT] (current) – [Update January 2026] john
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 </code> </code>
  
-==== update 28/5/22 ====+==== Update 28/5/22 ====
 After a period of observation the rate is now over-corrected. Try reducing correction to ''-37.5'' which corresponds to a ppm error of ''35.76ppm'', or ''3.26 s/d''. After a period of observation the rate is now over-corrected. Try reducing correction to ''-37.5'' which corresponds to a ppm error of ''35.76ppm'', or ''3.26 s/d''.
  
  
-==== RTC Error ==== 
  
 ^Date Start^Date Check^Accumulated Error (s)^Rate Error (s/d)^Comments^ ^Date Start^Date Check^Accumulated Error (s)^Rate Error (s/d)^Comments^
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 |15/04/23 | 22/11/23 | +33.3   | +0.2   | 33.3s in 221 days = 0.15 s/d | |15/04/23 | 22/11/23 | +33.3   | +0.2   | 33.3s in 221 days = 0.15 s/d |
  
-^Date Start^Date Check^Delta ^Latest Error^Average Error^Comments^ +==== Update January 2026 ==== 
-|23/01/26 |  | +2.7 |  | | Delta +2.7s @ start new period of monitoring - correction still -35.3ppm |+ 
 +Using my [[..:..:miscellany:watches:watchcheck|python Watchcheck]] 
 + 
 +^Date Start^Date Check^Delta^Latest Rate Error^Average Rate Error^Comments^ 
 +|23/01/26 |  | +2.7 |  | | New Period: correction-35.3ppm |
 |23/01/26| 24/01/26 | +2.6 | -0.1 | -0.1 | After 24 hours | |23/01/26| 24/01/26 | +2.6 | -0.1 | -0.1 | After 24 hours |
 |23/01/26| 26/01/26 | +3.0 | +0.2 | +0.1 | After 3 days | |23/01/26| 26/01/26 | +3.0 | +0.2 | +0.1 | After 3 days |
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 ==== Complex Numbers ==== ==== Complex Numbers ====
 +
 +For more about the ''41Z'' see the separate page [[..:guides:41z_module|]]
 +
  
 I'm using the ''41Z complex number'' module by Angel Martin to add a 4-level complex number stack. It's a bit confusing at first to get to grips with, but adds a lot of functionality to the the DM41x. I'm using the ''41Z complex number'' module by Angel Martin to add a 4-level complex number stack. It's a bit confusing at first to get to grips with, but adds a lot of functionality to the the DM41x.
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   * Firmware      : [[https://technical.swissmicros.com/dm41x/firmware/]]   * Firmware      : [[https://technical.swissmicros.com/dm41x/firmware/]]
-  * Documentation : [[https://technical.swissmicros.com/dm41x/doc/dm41x_user_manual.html|User Manual]]+  * Documentation : [[https://technical.swissmicros.com/dm41x/doc/dm41x_user_manual.html|Online User Manual]] 
 +  * Documentation : {{ :public:calculator:info:dm41x_user_manual.pdf | PDF Manual}}
   * Product Page  : [[https://www.swissmicros.com/product/dm41x|DM41X]]   * Product Page  : [[https://www.swissmicros.com/product/dm41x|DM41X]]
  
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   * See [[public:calculator:progs:dm41x_progs|]]   * See [[public:calculator:progs:dm41x_progs|]]
  
 +
 +===== HP-41CX Owner's Manuals =====
 +
 +Download from [[https://literature.hpcalc.org]]
 +
 +  * HP-41CX Owner's Manual Vol. 1 : [[https://literature.hpcalc.org/community/hp41cx-om-vol1-en.pdf]]
 +  * HP-41CX Owner's Manual Vol. 2 : [[https://literature.hpcalc.org/community/hp41cx-om-vol2-en.pdf]]
 +  * HP-41CX Quick Reference Guide : [[https://literature.hpcalc.org/community/hp41cx-qrg-en.pdf]]
  
  

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