Technical Design-in Guide Engine QLE G2 PRE KIT | 01-2019 | 1.0 | en
Thermal Aspects
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7.2.2. Temperature measurement on the module
There is a t point on top of the module for checking the temperature
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of the latter:
The temperature at the t point can be measured with a simple
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temperature probe.
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
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suitable adhesive. The measured values are recorded by an 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.
t point of the module
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7.2.3. Temperature management of the LED control gear
Although the LED control gear have an integrated temperature management system, the requirements relating to cooling of the LED
control gear must also be taken into account. Unintentional automatic dimming at overtemperature, for example, indicates inadequate
cooling of the LED control gear.
The LED control gear temperature can be measured with a simple temperature probe at the t point. The t point of the LED control
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gear is indicated by a sticker on the casing.
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NOTICE
Please check the information on the operating temperature and the requirements for cooling in the module data sheets.
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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”.
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Sources for suitable eat-conducting foil and paste for the thermal connection of a temperature probe can be found at "partners".
