Sunday, August 8, 2021

Calculated Industries Calculators: Memory Registers and Tape

Calculated Industries Calculators:  Memory Registers and Tape


Introduction


This post covers five Calculated Industries calculators:


Tradesman Calc - 4400

Construction Master 5 - 4050

Machinist Calc Pro - 4087

Pipe Trades Pro - 4095

ElectricCalc Pro - 5070


Memory Storage and Store Arithmetic


The calculators do not have storage arithmetic other than the independent memory register (M).   


Tradesman Calc - 4400 Construction Pro 5 - 4050 Machinist Calc Pro - 4087 Pipe Trades Pro - 4095 ElectricCalc Pro - 5070
M, registers 1 - 9 M only M, registers 1 - 9 M, registers 1 - 9 M, registers 1 - 9
M+, M- M+, M- M+, M- M+, M- M+

Tape Memory

All the calculators listed except the ElectricCalc Pro has a tape listing memory.  The tape memory records all the arithmetic (+, -, x, ÷), percent (%), and parenthesis keystrokes.  For the square (x²) and square root (√), the numeric results are recorded.  The tape memory does not record any work involving any of the solver keys.

Tape Memory Controls

Clear the Tape:  [ On/C ] [ On/C ] (or do a Clear All)
Enter Tape Mode: [ Conv ] [ = ]
Scroll in Tape Mode: [ + ], [ - ]
Exit Tape Mode:  [ = ]


The table lists the number of steps can be stored:


Tradesman Calc - 4400 Construction Pro 5 - 4050 Machinist Calc Pro - 4087 Pipe Trades Pro - 4095
20 20 30 30

Sample Problems and Tape Memory

Problem 1:  1.99 x 50 + 100 =    (Result: 199.5)

All calculators return the same tape (spaces added for clarity):
01  1.99
02 x 50
03 + 100
TTL = 199.5

Problem 2:  4 1/2 in + 3 3/8 in =  (Result:  7 7/8 in)

All calculators return the same tape:
01   4 1/2 INCH
02 + 3 3/8 INCH
TTL = 7 7/8 INCH

Tape with arithmetic functions will work with units.

Problem 3:  ( 1.99 x 20 + 25 ) = + 10% =   (Result: 71.28)

Tradesman Calc (4400) tape:
01  ( 1.99
02  x 20
03  + ) 25
SUB = 64.8
05 +% 10
SUB % 71.28
TTL = 71.28

Pipe Trades Pro (4095) tape:
01  1.99    (first parenthesis is messing)
02  x 20
03  + ) 25
SUB = 64.8
05 +% 10
SUB % 71.28
TTL = 71.28

Construction Master 5 (4050) tape and 
Machinist Calc Pro (4087) tape:

The parenthesis are left out since neither of these calculators have parenthesis.  I have left the calculations in that order to ensure proper order of operations:
01  1.99    (first parenthesis is messing)
02  x 20
03  + 25
SUB = 64.8
05 +% 10
SUB % 71.28
TTL = 71.28

Problem 4:  15 x^2 x π  (Result:  706.85835)

All calculators return the same tape:
01 225   (shows 15^2)
02 x 3.141593
TTL = 706.85835

Problem 5:  24 x 59 = √   (Final Result:  √1416 = 37.62978)

All calculators return the same tape:
01 24
02 x 59 
TTL = 1416
The square root is totally ignored!

Problem 6:  24 √ x 59 √ =    (Result: 37.62978)

All calculators return the same tape...
01 4.898979 
02 x 7.681146
TTL = 37.62978

except the Trademsan Calc (4400) - sometimes:
01 24
02 x 7.681146
TTL = 37.62978   (this doesn't make sense!)

However, most of the time, I get the proper tape above.  This just a thing to watch out for.  

Note that √(24 * 59) = √24 * √59

Curious that none of the Calculator Industries finance and real estate calculators have the tape feature.  

The Recall Memory Feature:  Additional Calculations

The Recall Memory (Rcl) of the independent memory register returns three calculations:

TTL:  total or sum
AVG: average of all entries by M+
CNT:  count of all entries by M+

[ Rcl ] [ M+ ]: To display the contents of the independent register (total).
Keep pressing [ M+ ] to cycle through average, count, total.  Press [ On/C ] to exit.  

The notable exception is the ElectriCalc Pro:

[ Rcl ] [ 0 ]:  To display the contents of the independent register (total).
Keep pressing [ 0 ] to cycle through average, count, and total.  Press [ On/C ] to exit.  

Sample Data:
410, 359, 367, 388, 384

Recall memory M until it's cleared.  You can store 0 into Memory M or press RCL twice.  Insert presses of [ Conv ] when needed.  
410 M+
359 M+
367 M+
388 M+
384 M+

Note:  On the ElectriCalc Pro, press [ Stor ] [ M+ ] to use M+.

RCL M: 
TTL 1908  (TOTAL on the Machinist Calc Pro)
(Press M again)
AVG  381.6
(Press M again)
CNT  5   (COUNT on the Machinist Calc Pro)
(Press M again to cycle.)


That is a tour of the memory features on some of the industrial calculators from Calculated Industries.  Hope you find this useful!

Eddie

All original content copyright, © 2011-2021.  Edward Shore.   Unauthorized use and/or unauthorized distribution for commercial purposes without express and written permission from the author is strictly prohibited.  This blog entry may be distributed for noncommercial purposes, provided that full credit is given to the author. 


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