Temperature and Relative Humidity E-9
Contents
1. point temperature is defined as the temperature at which dew begins to form The higher the dew point the more moisture is in the air In this activity we will measure relative humidity and temperature throughout a period of 24 hours Relative humidity and temperature data can also be inserted into a dew point calculator Experiment E 9 Temperature and Relative Humidity Ver 3 2 1 3 NeuLog EJ Procedure sensor setup 1 Connect the USB 200 module va to the PC 2 Check that the temperature sensor and the relative humidity sensor are connected to the USB 200 module Note The following software functions are explained in short It is recommended to practice the NeuLog application functions as described in the user manual beforehand 3 Run the NeuLog application and check that the sensors are identified settings 4 Click on the Off line Experiment icon in the NeuLog main icon bar 5 Click on the Experiment Setup icon Ey and set the Experiment duration to 1 day Sampling rate to 30 per hour Experiment E 9 Temperature and Relative Humidity Ver 3 2 1 4 NeuLog EF Testing and measurements 6 10 11 12 Set up the experiment as shown in the picture below Attach the relative humidity sensor to the temperature sensor and connect them to a fully charged battery module Attach the sensors to the utility stand Place the utility stand with the sensors outside in the shade Press2. 1 NeuLog EJ Experiment E 9 Temperature and Relative Humidity Objectives To study the relationship between temperature relative humidity and dew point To follow temperature and relative humidity during a period of 24 hours Modules and Sensors PC NeuLog application USB 200 module 4 BAT 200 Battery module NUL 203 Temperature logger sensor Es NUL 207 Relative humidity logger sensor It is also possible to use a NUL 245 Dew point logger sensor if it is available Equipment and Accessories Utility stand Right angle clamp Extension clamp The items above are included in the NeuLog Utility kit UTL KIT Experiment E 9 Temperature and Relative Humidity Ver 3 2 1 2 NeuLog EJ Introduction Relative humidity is the most common way for describing atmospheric moisture but it does not describe the actual amount of water vapor in the air Instead it indicates how close the air is to being saturated The relative humidity RH is the ratio between the amount of water vapor actually in the air and the maximum amount of water vapor required for saturation at that specific temperature and pressure When the amount of moisture in the air remains constant and the temperature increases relative humidity decreases The combination of temperature data and relative humidity data gives us the dew point temperature which is a better indicator of the amount of moisture in the air than only relative humidity Dew
3. did the amount of moisture in the air change 2 If the relative humidity graph is not a mirror image of the temperature graph what can you conclude about the dew point and moisture in the air Experiment E 9 Temperature and Relative Humidity Ver 3 2 1
4. on the temperature sensor s push button and then on the relative humidity sensor s push button in order to start the measurement After one day connect the sensors back to the USB 200 module Click on the Search Sensors icon Q and then click on the A Offline Experiment icon Gass Experiment E 9 Temperature and Relative Humidity Ver 3 2 1 5 NeuLog EZ t 13 Click on the Load Experiment icon wy The menu shows a list of stored experiments in the sensor s memory up to 5 14 Choose the relevant experiment and click on the Load Experiments button 15 Click on the Zoom fit icon Ea 16 Your graph should be similar to the one below NeuLog o amp gt Back Save pen Expenment Expenment R ECN lo re Time Hour Unzoom Zoom Zoom Select Line Show All Fit Zone Width Functions 1 30 at night 17 Save your data 18 We can see that at around noon the temperature value is maximal and the relative humidity value is minimal At night the temperature value is minimal and the relative humidity value is maximal Experiment E 9 Temperature and Relative Humidity Ver 3 2 1 6 NeuLog EJ Summary questions 1 What do you think is the dew point trend in the sample experiment What do you think is the dew point trend in your experiment Use this website to calculate the dew point in a few points throughout your graph http andrew rsmas miami edu omcnoldy Humidity html How did the dew point change How
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