OSRAM DULUX F - Manual (Page 92)

Economical long-life light sources with plug-in bases
Compact Fluorescent Lamps OSRAM DULUX ®
Technical Guide
90
7 Measuring OSRAM DULUX ® compact fluorescent lamps
OSRAM DULUX ® lamps differ, in some cases quite considerably, from double capped fluorescent
lamps in terms of their technical characteristics. In measurements, therefore, particular attention
should be paid to the following (see also IEC 60901):
1. Defined ageing (seasoning) of the lamp (100 hours)
2. Adequate burn-in time (stabilization) before measurements are taken (24 hours, and see
measurement steps under 7.1, p. 90)
3. Constant Ta (ambient temperature) during the measurements (25 ± 1°C)
4. No destabilization due to mechanical vibrations, even when switched off
5. High crest factor resolution for measurement equipment (true rms instruments).
6. Short mains supply and measurement instrument wiring to the lamp (for ECG operation)
If these conditions are met, OSRAM DULUX ® lamps display good reproducibility of electrical and
photometric values. Reference lamps measured under the following conditions can be obtained
from OSRAM (see 7.6, p. 93).
7.1 Ageing of lamps
Before photometric data is gathered, new lamps should be aged (seasoned) for 100 hours.
During shipping and normal handling of the lamps, e.g. rotating of the lamp, any excess amount of
mercury may be distributed in small droplets within the discharge tube. Proper conditioning is
reached when all the excess mercury has been collected at the coldest spot in the tube. Experience
has shown that initially this process of lamp conditioning may take up to 24 h. When a lamp, once
having passed this conditioning period it is ready for measurement
For conditioning and warming up the lamp may be operated in a location, distant to the test
location. When moving to the test location, provided that the lamp has been kept in the same
position and not subjected to vibration or shock and no warm glass parts are touched (i.e. creating
a parasitic cold spot). Before moving an amalgam lamp to the test location let the lamp cool down
for 1 min in the burning position. A stabilisation period of 15 – 60 minutes (see table) is necessary in
the test location. To avoid cooling down of warm glass parts during moving the lamp to test location
thermally insulating gloves or similar technique shall be used. The interruption of the supply should
be as short as possible.
Measurement of light output and lamp operating voltage must be taken at least once per minute.
During the final 5 minutes of stabilisation time, the difference of maximum and minimum readings of
light output and lamp operating voltage shall be less than 1% of the average of the readings. If this
is not feasible, the real fluctuation shall be stated.
Stabilisation time versus off time
Conditioning (can be part of aging) [h] 24
Off time (transport to test location) [min] 5 > 5
Stabilisation time [min] 15 60