Review: Casio Nursing Calculator SP-100UNSU

Review:  Casio Nursing Calculator SP-100UNSU

It's rare, but there are nursing-based calculators that are available in the market from time to time.  Here is a review of one.

Quick Facts

Model:  SP-100USNU

Company:  Casio

Years:  2022-current

Type:  Nursing 

Batteries: CR2016

Operating Modes:  Chain

Number of Registers: 1

Display:  10 digits, with prompts

Cost:  $39.99 USD

The calculator that I ordered came in an ecology-friendly package, with the calculator wrapped in a bubble wrap pocket.  Unfortunately, it does not have a hard sliding case or the calculator being in a wallet.

The calculator casing has a nice silver finish with white keys.

A Calculator for the Nursing and Pharmacy Industries

The SP-100USNU is built for the nursing and pharmacy industries.  Five of the keys deal with six calculations, which each of the top keys serving as a toggle.  What is great about the SP-100USNU is that the calculator gives prompts and menus as necessary.  The display is crisp and clean.  

[ BMI ]:   Body Mass Index.   Two input modes:  lbs/ft/in,  kg/cm

[ Dose ]:  Does Calculation.   Solve for Ordered Dose given Desired Dose, or solve for Desired Dose given Ordered Dose.  Doses are in mL, with amount of the medicine (per pill, capsule, gummy, etc.) in mg.

[ BSA ]:  Body Surface Area approximation in square meters.  Two input modes:  lbs/ft/in, kg/cm

[ eGFR ]:  Calculate the estimated glomerular filtration rate which assist in diagnosis of chronic kidney disease.   The CKD-EPI equation, which factors a person's skin color (black vs. non-black), sex (male vs. female), weight (for body surface area), creatinine secretion (mg/dL), and the person's age.  What is calculated?   CCr, Creatinine Clearance, in mL/min and eGFR, estimated glomerular filtration rate, in mL/min/1.73m^2.   The average body surface area is estimated to be 1.73 m^2.  

[ IV rate ] (date):  This key toggles between two types of calculations: IV Drip Rate and Date calculation.

IV Drip Rate:  three inputs are needed.   Volume of medicine in mL, time that the IV lasts in minutes, and drop factor in gtts/mL (typically 15 - 20 gtts/mL).  gtts stands for number of drops.  The drip rate is given in gtts/min.  

Date:  Calculate the date functions for all dates in the 21st century (January 1, 2000 to December 31, 2099).  

1.  Before:  calculate the date before the base date.  

2.  After:  calculate the date after the base date.  

3.  Period: calculate the days between dates.

The formulas are given at the back of box (expect for CCr and the date calculations) and listed in the manual (expect for date calculations).   Hence the box and the manual is a neat reference.   

Link to the manual, which has to be downloaded:  https://support.casio.com/storage/en/manual/pdf/EN/004/SP-100USNU_EN.pdf

Regular Calculator  

The SP-100USNU is also a regular four function calculator.  Unfortunately neither the percent function (%) nor the square root function (√) are present.  I would think that the nursing profession would work with percentages. We do have memory calculations (M+, M-, MRC).

Also you may need access to a conversion table (via calculator, book, internet, all of the above) to do common conversions.   I would have loved to see that present here too.

Conversion Factors

1 kg = 2.20462 lb

1 in = 2.54 cm

1 L = 1000 mL

1 hr = 60 min

During the prompts, we can execute side calculations before entering the required entry in the prompt.

Final Thoughts

I did not like the fact that that calculator does not have the % and the √ functions.  It would be nice if conversion factors were included (especially with the money).  However, the formulas included make a great specialized calculator.   

Eddie 

All original content copyright, © 2011-2022.  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. 

TI-65 Programs

TI-65 Programs

Conversions:  Miles and Kilometers 

TI-65 Conversion:  

F1:  Miles to Kilometers

F2:  Kilometers to Miles

00  2nd 53.53     LBL F1

01  38     ×

02   6     6

03   3     3

04   3     3

05   6     6

06   0     0

07  39     =

08  3rd 25     in-cm

09  28     ÷

10   1     1

11  15     EE

12   5     5

13   39   =

14   -15   INV EE    // remove scientific notation

15   2nd 52    RTN

16   2nd 53.54     LBL F2

17   38     ×

18   1      1

19   15    EE

20   5      5

21   -3rd 25     INV in-cm

22   28     ÷

23   6      6

24   3      3

25   3      3

26   6      6

27   0      0

28   39   ×

29   -15      INV EE

30   2nd 52    RTN

4.9 mi to km:

4.9 [ F1 ]

Result:  7.8857856  km

150 km to mi: 

150 [ F2 ]

Result:  93.20567884 mi

Conversions:  RGB (Red/Green/Blue) Color Code and Hexadecimal Codes

TI-65 Conversions:

F1:  RGB to Hexadecimal

F2:  Hexadecimal to RGB

00   2nd 53.53      LBL F1

01    38     ×

02    1       1

03    6       6

04    18     y^x

05    4       4

06    39     =

07    12.0    STO 0

08    51    R/S

09    38    ×

10    2      2

11    5      5

12    6      6

13    39    =

14    12.59   STO+

15    0      0

16    51    R/S

17    12.59    STO+

18    0       0

19    13.0    RCL 0

20    3rd 13   HEX

21    2nd 52  RTN

22    2nd 53.54   LBL F2

23    12.0   STO 0

24    3rd 12    DEC

25    28      ÷

26    1        1

27    6        6

28    18      y^x

29    4        4

30    39      =

31    2nd 27   INTG

32    51     R/S

33    38     ×

34    1       1

35    6       6

36    18     y^x    

37    4       4

38    39     =

39    12.49  STO-

40    0      0

41    13.0    RCL 0

42    28    ÷

43    2      2

44    5      5

45    6      6

46    39    =

47   2nd 27   INTG

48   51     R/S

49   38     ×

50   2       2

51   5       5

52   6       6

53   39     =

54  12.49   STO-

55   0        0

56   13.0   RCL 0

57   2nd 52  RTN

RGB to HEX:   red  [ F1 ]  green [ R/S ] blue [ R/S ] 

Example:  Red:  108, Blue:  4, Green: 82

108 [ F1 ]  4 [ R/S ] 82 [ R/S ]

Result:  6C0452  (HEX mode)

HEX to RGB:   [ 3rd ] (HEX) hex code [ F2 ]  

Example:  Hex Code: 3401D2

[ 3rd ] (HEX) 3401D2 [ F2 ] 

Result:  52 (red) [ R/S ], 1 (green) [ R/S ], 210 (blue)

Electronics:  Primary Filter and Voltage Gain

F1:  Calculate frequency.  f = 1 ÷ ( 2 * π * R * C ).   

Syntax:  R [ F1 ] C [ R/S ]

R = resistance in ohms ( Ω )

C = capacitance in farads ( F )

f = frequency in Hertz (Hz)

F2:  Voltage Gain.  G = 20 * log( E_output ÷ E_input ).  

Syntax:  E_output [ F2 ] E_input [ R/S ]

E_output = output voltage ( V )

E_input = input voltage ( V )

G = voltage gain in decibels ( dB )

Source:  Casio fx-61f User's Manual

00  2nd 53.53  LBL F1

01  38    ×

02  51    R/S

03  38    ×

04  2      2

05  38    ×

06  2nd 17  π

07  39    =

08  34    1/x

09 2nd 52  RTN

10  2nd 53.54  10

11  28    ÷

12  51    R/S

13  39    =

14  2nd 32  LOG

15  38   ×

16  2     2

17  0     0

18  39   =

19  2nd 52  RTN

R = 8400 Ω, C = 0.05*10^-6 F

8400 [ F1 ] 0.05E-6 [ R/S ]

Result:  3.789403407E2 Hz

E_output = 54 V, E_input = 28 V

54 [ F2 ] 28 [ R/S ]

Result:  5.70471457 dB

Eddie

All original content copyright, © 2011-2022.  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. 

Retro Review: Hewlett Packard HP 45

Retro Review:   Hewlett Packard HP 45

Quick Facts:

Model:  HP 45

Company:  Hewlett Packard

Years:  1973-1976

Type:  Scientific

Batteries: (original) HP Battery Pack 82001A (rechargeable), compatible batteries can be found on eBay, AC Adapter 82002A

Operating Mode:  RPN

Memory Registers: 9 (R1 - R9), some are used in statistics

Undocumented (by the manual) Feature:  Stopwatch

Original Price:  $395.00 (US) 

Package Includes AC Adapter, User Manual, Pocket Guide, Carrying Case 

Features - History

The HP 45 is the second scientific calculator by Hewlett Packard, first brought to the market in 1973; after the legendary HP 35 was released in 1972.  The HP 45 is the second Hewlett Packard calculator to feature a shift key, after HP's first financial calculator, the HP 80.  

The HP 45 operates on Reverse Polar Notation (RPN).   Here is a Wikipedia page on RPN:  https://en.wikipedia.org/wiki/Reverse_Polish_notation

The HP 45 added more functions to the HP 35, which features include:

* trigonometric functions and inverses

* logarithms and antilogs

* powers and roots

* fixed and scientific 

* factorial of integers

* polar/rectangular conversions

* degrees/degree-minute-second conversions (DD.MMSSSS)

* percent and percent change

*  three angle modes: degree, radians, grads 

* Last x

* three unit conversions

* statistics

* storage and recall arithmetic

When the HP 45 is powered on, the calculator will be in FIX 2 mode.  

Factorial of Integers:   The function n! allows only integers from 0 to 69.  It will be later HP calculators to extend the factorial function to the real numbers.

Polar and Rectangular Conversions:  The conversions involve the X and Y stack.  In polar form, X represents r and Y represents θ.

Conversions:  The HP 45 provides conversion factors for unit conversions. Examples provided in FIX 2 mode. 

[ shift ] [ 7 ]: cm/in.   1 in = 2.54 cm.    

18 in to cm:  18 [ shift ] [ 7 ] [ × ] returns 45.72 cm

50 cm to in:  50 [ shift ] [ 7 ] [ ÷ ] returns 19.69 ft

[ shift ] [ 8 ]:  kg/lb.   1 lb ≈ .4536 kg

200 lb to kg:  200 [ shift ] [ 8 ] [ × ] returns 90.72 kg 

66.5 kg to lb:  66.5 [ shift ] [ 8 ] [ ÷ ] returns 146.61 lb

[ shift ] [ 9 ]: ltr/gal.  1 gal ≈ 3.7854 ltr

150 gal to ltr:  150 [ shift ] [ 9 ] [ × ] returns 567.81ltr

690 ltr to gal:  690 [ shift ] [ 9 ] [ ÷ ] returns 182.28 gal

Percent:  The [ % ] key returns x% of y, while leaving the value in the Y stack.  This could be followed up with [ + ] or [ - ] for percent adding and subtracting calculations.  

Add 6% to 150.

150 [ ENTER ] 6 [ % ] [ + ] returns 159.00

Percent Change:  The [ shift ] [ % ] (∆%) calculates percent change:  (y - x)/y * 100 with the value of the Y stack remains. y is old, x is new.

What is the percent change from 35 to 45?

35 [ ENTER ] 45 [ shift ] [ % ] returns 28.57 (%)

The HP 45 has storage and recall arithmetic for the four arithmetic functions (+, -, ×, ÷).  I love storage arithmetic and any time we get recall arithmetic, it's a huge bonus. 

The keyboard feels good and the keys feel responsive.  

Statistics

The HP 45 has one-variable statistics, which some sums for y-data.

R5 = n

R6 = Σx^2

R7 = Σx

R8 = Σy

RCL Σ+ returns Σx to the X stack and Σy to the Y stack

[ shift ] [ R↓ ] returns x-bar to the X stack and sx to the Y stack

Stopwatch

A famous and undocumented feature of the HP 45 is a stopwatch.  The stopwatch is accessed by the sequence [ RCL ] then pressing [ 7 ], [ 8 ], and [ CHS ] keys at the same time.  Done right the display will be in the form:

hh.mm ss     'ss

Press [ CHS ] to start and stop the timer, and any number keys can be used to store the time for lap records.  The stored time will be stored as a decimal and the two two digit exponent will store the hundredths of seconds. 

Pressing [ CLx ] clears the time and [ ENTER ] returns us to the operator mode.  I understand that due to the lack of crystal, the timer is somewhat inaccurate.   

Closing Thoughts

I love this calculator!   It's good to have a calculator from the 1970s, especially from HP.  

Until next time,

Eddie

All original content copyright, © 2011-2022.  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. 

TI-84 Plus CE (Python): Using SciTools for Conversions and Constants

 TI-84 Plus CE (Python):  Using SciTools for Conversions and Constants

SciTools 

SciTools is a complementary application that comes with the purchase of the TI-84 Plus family.   The SciTools offers four tools:

1.  SIG-FIG Calculator:  calculate using a designated number of significant digits

2.  UNIT CONVERTER:  conversions and constants, which will be this blog entry's focus

3.  DATA/GRAPHS WIZARD

4.  VECTOR CALCULATOR:  vector mode

Converting Units in SciTools

The Unit converter has two screen:  upper screen has the units to be selected, bottom screen is where the conversion happens.   

1.  Press [ apps ] and select SciTools, you may have to scroll.    

2.  Select option 2: UNIT CONVERTER.

3.  You will be prompted for a Unit Category, either arrows or the number keypad can be used.

4.   Enter the value to be converted.  

6.  Use the arrow keys to select, by pressing [ enter ] to select the "from" unit and the "to" unit.   Results will be shown in scientific notation.

Example:  70 ft to m:

1:  LENGTH, 70, select ft, [ enter ] select m, [ enter ]

7E1 ft > 2.1336E1 m  (21.336 m)

To copy the results to the home screen, press [ zoom/f3 ] (EXPT).  You will have to leave the app entirely to use the export as the result starts a new calculation in Home mode.

Copying a Scientific Constant

The numeric value of a scientific constant can be copied from SciTools to the Home Screen (unfortunately this can be done to a programming editing page) by the following:

1.  Press [ apps ] and select SciTools.  

2.  Select option 2:  UNIT CONVERTER

3.  To get to the list of constants, press either [ y=/f1 ] or [window/f2].   

4.  Use the arrow keys to select the scientific constant.  The name, it's value, and units will be displayed at the bottom of the screen.

5.  Press [ zoom/f3 ] (EXPT) to export the constant to the Home screen.  

6.  Press [ 2nd ] [ mode ] (QUIT) three times to get back to the home screen.  

7.  To use the constant in operations, either press [ enter ] and use Ans, or store the value in a variable (A-Z, Θ) for future calculations.

I'll admit that this is cumbersome.  Unfortunately, a constant's value cannot be copied directly to a program editing screen.  It's better than nothing...

HP 32S and HP 32SII Week:  May 2, 2022 - May 6, 2022

Eddie 

All original content copyright, © 2011-2022.  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.