Users' Guide User guide

114 Heat Transfer by Radiation

2. Set the sampling periods of both probes to 10 seconds.

a) Press to return to the Home Screen; press to open the Sensors

screen.

b) Observe the top part of the screen and note which sensor (“Temperature

Sensor” or “Temperature Sensor 2”) is selected.

c) With Sample Rate Unit highlighted, press to open the menu; press

to select seconds.

Select seconds from the Sample Rate Unit menu

d) Press the down arrow to highlight Sample Rate; press until the

value is set to 10 seconds.

e) Press the left or right arrow to select the other sensor.

f) Repeat steps c and d to set the sampling rate for the newly selected sen-

sor to 10 seconds.

3. Set up the Graph to display both temperatures.

a) Press to return to the Home Screen; press to open the Graph.

The Graph is automatically set up to display data from the first tempera-

ture probe.

b) Press to open the Graphs menu; press to select Two Measure-

ments mode. The second temperature measurement will be added to the

Graph.

Data Collection

1. Fill both cans with equal amounts of hot water.

2. Press to start data collection.

3. Press to automatically scale the Graph.

4. Gently swirl the cans as data will be collected for about 15 minutes.

5. Press to stop data collection.

Analysis

Which can cooled faster? Why?

Observe which sensor is selected

tuv

Set the Sample Rate to 10 seconds

Press or to select the other sensor

Graph prepared to display both tem-

perature measurements

ghi