Soldering tips and tricks - temperature measurement during assembling/soldering

This article presents two video clips about soldering tips and tricks during electromechanical component assembling. For these videos ULN2xxx DIY KIT PCB and 4K7 0.25W resistor are used. The measurements are not 100% precise, but example is clear, it shows that component cooling is much faster by using the external device/tool (like: mini long-nose pliers) in comparison with cooling at room temperature (25/26 Celsius degrees). For measurements, DT9208 digital multimeter and thermocouple sensor/wire are used.


Video #1

Temperature measurement with digital multimeter thermocouple during soldering. This video clip presents cooling at room temperature without external cooling device/tool (like: mini long-nose pliers) after soldering has been done. It also presents how the temperature rises during soldering process. Soldering started at ~100 Celsius degrees. After soldering iron has been removed temperature goes down, but it requires more time to go back to 26 Celsius degrees without external cooling device.


Video #2

Temperature measurement with digital multimeter thermocouple during soldering. This video clip demonstrate cooling after the soldering process has been done with the external cooling device/tool (like: mini long-nose pliers). Soldering started at ~100 Celsius degrees. Cooling is much faster with external cooling device/tool in comparison with cooling at room temperature (Video #1).


Measurements and calculations:

Video #1:
--------------
Soldering iron removed @ ~0:16.2 (Temperature was 136 Celsius degrees)
First occurrence of 26 Celsius degrees @ ~1:35.7
Cooling time: ~79.5 seconds

Video #2:
--------------
Soldering iron removed @ ~00:17.4 (Temperature was 139 Celsius degrees)
First occurrence of 26 Celsius degrees @ ~00:47.1
Cooling time: ~29.7 seconds

Difference: ~79.5 - ~29.7 = ~49.8 seconds
Second case with external cooling device/tool cool down temperature ~49.8 seconds faster 

Digital multimeter thermocouple sensor/wire

Measurements are not 100% precise, but it shows how cooling is faster with the external cooling device/tool. Of course, you will cut the wire after soldering, but you can always cool down soldering join faster with the external cooling device/tool. In some cases it is important to cool down component fastest as it is possible. This does not mean that the ice cubes should be used to cool down components, as components will experience thermal shock.

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