OSRAM PrevaLED Core Z3 - Manual (Page 16)

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PrevaLED ® Core Z3 LED modules | Thermal considerations
Note: Please keep in mind that you need a direct contact
between the thermocouple and the PCB.
Note: If you use a TIM, please cut out a small area where
the thermocouple has direct contact to the metal-core
PCB.
To measure the temperature and to ensure a good thermal
coupling between the LED module and the heat sink, drill a
hole into the heat sink and push the thermocouple through
the heat sink. To ensure a direct contact between the ther-
mocouple and the PCB, it is recommended to glue the ther-
mocouple onto the PCB. You can, for example, use an acry-
lic adhesive (e.g. type Loctite 3751).
It is also possible to use a sprung thermocouple. A suitable
type is: Electronic Sensor FS TE-4-KK06/09/2m. Please no-
te that a good thermal contact between the thermocouple
and the PCB is required. Please refer to the data sheet and
the application guideline of the manufacturer to ensure cor-
rect handling.
Another possible way is to create a small groove along the
top surface of the heat sink and run the thermocouple inside
the groove to the t
c
point.