Instruction manual

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Possible cause:
b) The temperatures at the measuring point on the ECG or at the cool
spot on the lamp(s) are exceeded (for a brief description of the
temperature at the ECG and lamp see end of text).
Remedy:
The luminaire or site of installation should be modified to ensure
that the maximum recommended temperature is not exceeded
even in onerous conditions circumstances (high ambient
temperature and/or high supply voltage).
8.5.4 Different brightness
levels
Problem:
Luminous output too low compared with other luminaires. Different
brightness levels for the two lamps in two-lamp luminaires. Different
brightness levels at the lamp ends
Possible cause:
a) Typical maintenance behaviour of a fluorescent lamp at the end of
its life
Remedy:
Replace the lamp (for two-lamp ECGs we recommend replacing
both lamps at the same time to keep maintenance time and costs
to a minimum).
Possible cause:
b) Lamps of different wattages colour appearance or incorrect
wattage
Remedy:
The lamp wattage must match the wattage indicated on the ECG.
The colour appearande should be homogenous within an
application.
Possible cause:
c) Incorrect wiring between ECG and lamp (output terminals not used
or reversed; contact problems)
Remedy:
Check the lamp-side wiring for correct contact. Has the lamp
connection been wired according to the wiring diagram on the EG?
For two-lamp ECGs in particular, check that the common or
external connection is correctly wired. Pay particular attention in
the case of special combinations.
Possible cause:
d) Lamps are “force cooled” by draughts
Remedy:
Find the cause of the draught and either eliminate the draught or
protect the lamps accordingly.