L Manual

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3.8 Temperature response of dimmable ECGs from OSRAM
Permissible standard values for minimum ambient light tempera-
tures:
Lamp type Min. temperature
at 1 % (3 % CFL)
dimmer setting
Min. dimmer setting of
-20 °C to +10 °C
T8/26 mm lamp*** -20 °C* 1 %*
T5/16 mm lamp*
HE 14…35
HO 49
HO 24…80
+10 °C 60 %****
50 %
30 %
DULUX L* +10 °C 30 %
DULUX D/E, T/E, FC +10 °C** 50 %
Table 7
* Only with QTi…DIM ** 3…100 % *** L18 W, L36 W, L58 W, not
L70 W ****; The critical point from which the maintaining voltage
increases excessively for cold HO lamps lies just below the 30 % dim-
mer setting. For HE lamps, this point is reached at the same pow-
er density. Because of the 100 % power being approx. only half as
high, the dimmer setting is 60 % here. The HO49 lies between HE
14…35 W and HO 24…80 W/Dimming of the amalgam lamps T5 HO
CONSTANT (24 W, 39 W, 54 W, 80 W), CFL (DL CONSTANT 40 W,
55 W, 80 W and T/E IN PLUS 26 W, 32 W, 42 W, 57 W) is possible.
The temperature range of the luminaires can be expanded down-
wards by raising the lowest dimmer setting until the light has reached
a higher inner temperature, otherwise flickering or/and starting prob-
lems of the lamp can be expected. From the end of 2008 units do this
automatically.
3.8.1 Intelligent thermal management in hot luminaires
Intelligent thermal management enables operation in a wide ambient
temperature range through power reduction.
From the generation at the end of 2008, the QTi (DALI)…DIM ECG
from OSRAM include the feature of intelligent temperature regulation.
Features
• Notable increase in the light yield (lm/W) of hot luminaires
• Virtually no loss of luminous flux (lm) compared with uncontrolled
operation
• No reduction in the service life of the ECG within the control range
• Simplifies the safety approval of hot luminaires
• Relieves luminaire components