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.
