Technical Design-in Guide Engine LLE G2 PRE KIT | 03-2020 | 1.2 | en
Thermal Aspects
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In practice, thermocouples (e.g. B&B Thermotechnik, K-type thermocouple) have proved successful. Such thermocouples can be
attached directly to the t point with heat-resistant adhesive tape or a suitable adhesive. The measured values are recorded by an
p
electronic thermometer (e.g., "FLUKE 51", VOLTCRAFT K202 data logger).
The maximum possible temperature must be determined under worst-case conditions (ambient temperature, installation of the
luminaire) for the relevant application. Before the measurement is taken, the luminaire should be operated for at least 4 hours in a
draught-free room.
The measurement must be taken in a steady thermal state and in a draughtfree room.
7.2.4. Temperature management of the LED Driver
Although the LED Driver have an integrated temperature management system, the requirements relating to cooling of the LED Driver
must also be taken into account. Unintentional automatic dimming at overtemperature, for example, indicates inadequate cooling of
the LED Driver.
The LED Driver temperature can be measured with a simple temperature probe at the t point. The t point of the LED Driver is
c
c
indicated by a sticker on the casing.
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NOTICE
Measurement conditions, sensors and handling are described in detail in standard EN 60598-1 "General requirements and tests for
luminaires".
Sources for suitable heat-conducting foil and pastes for thermal connection to a temperature probe are given at the end of this
documents.
