Suppose you have a thermal switch which is supposed to open at about 75 °C
and close at about 50 °C and you want to test the switch to see how accurate
and repeatable it is. You can use the temperature hold feature and the scan
function to test the switch. Measurements can be made by observing the display
or, preferably, by collecting data using a computer connected to the RS-232 port.
To set up the test do the following steps.