The Museum of HP Calculators

Heat Exchangers Counter Flow Subroutine for the HP-41C/CV/CX

This program is Copyright © HP and is used here by permission. It was originally printed in the HVAC Solution Book. This program was entered and uploaded by Tony Duell.

This program is supplied without representation or warranty of any kind. Tony Duell, Hewlett Packard and The Museum of HP Calculators therefore assume no responsibility and shall have no liability, consequential or otherwise, of any kind arising from the use of this program material or any part thereof.

Documentation Information (CD or source code)
How to get this Program to your Calculator (via HP-IL, disk, wand, and fingers)
Download Binary (.raw) program for disk or PC HP-IL Card download
Download Hexadecimal (.dat) program for Serial Port download

Program Listing

LINE  KEYS
 01 LBL "ACON"
 02 RCL 10
 03 1/X
 04 -
 05 1
 06 LASTX
 07 -
 08 /
 09 LN
 10 1
 11 RCL 09
 12 -
 13 X=0?
 14 GTO 10
 15 /
 16 RCL 07
 17 *
 18 RTN
 19 LBL 10
 20 RCL 10
 21 1
 22 RCL 10
 23 -
 24 /
 25 RCL 07
 26 *
 27 RTN
 28 LBL "ECON"
 29 1
 30 -
 31 RCL 11
 32 RCL 07
 33 /
 34 *
 35 E^X
 36 1
 37 X<>Y
 38 -
 39 LASTX
 40 RCL 09
 41 *
 42 1
 43 X<>Y
 44 -
 45 X=0?
 46 GTO 11
 47 /
 48 RTN
 49 LBL 11
 50 RCL 11
 51 RCL 07
 52 /
 53 ENTER
 54 ENTER
 55 1
 56 +
 57 /
 58 RTN
 59 END

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