E-CodePsychrometrics: wet-bulb and dew point — a TI-84 Plus CE program
WETBULB is a TI-BASIC program for the TI-84 Plus CE. Humidity ratio, dew point, wet-bulb temperature (energy balance solved by bisection), enthalpy and specific volume of moist air.
What it asks for and what it shows
It asks for 3 values at its prompts. In the example below it shows W, DEW PT, WETBULB, H KJ/KG, V M3/KG.
Example run
One of its oracle test cases: “25 C 50% sea level”. The inputs are typed in order, and the results are the values the case expects on the screen.
| Step | Value |
|---|---|
| You enter | |
| Input 1 | 25 |
| Input 2 | 50 |
| Input 3 | 101.325 |
| The screen shows | |
W= | 0.009858223111 |
DEW PT= | 13.85761254 |
WETBULB= | 17.89324165 |
H KJ/KG= | 50.26382338 |
V M3/KG= | 0.8580122727 |
How it's checked
5 test cases, each checked against an independent method. Replayed key by key on a virtual TI-84 Plus CE, they make 31 checks.
How E-Code checks every program
Run it or put it on your calculator
- Open the library in the TI-84 Plus CE calculator and pick “Psychrometrics: wet-bulb and dew point” (WETBULB).
- Put it on your own calculator with a computer and a USB cable, or type it in by hand.
Related programs
- Stefan tube: evaporation by diffusion
- RC circuit charging transient
- Cantilever beam deflection
- Reynolds number / flow regime
- Three-loop circuit (mesh currents)
All TI-84 Plus CE engineering programs · All TI-84 Plus CE programs