SM3000 DELTA ELEKTRONIKA BV
1991, rev. May 2008 OPERATING MAINTENANCE TROUBLE SHOOTING CALIBRATING Page 4 - 5
OPERATING AND STORAGE CONDITIONS
1) TEM PER A TURE
• The op erating tem perature range at full load is –20 to +50 °C.
But this tem perature range only holds when the AIR-INTAKE and
AIR-OUTLET are un obstructed and the temperature of the
AIR-INTAKE is not higher than +50 °C.
• Please note: a lower temperature ex tends the life of the
power supply.
• When the power sup ply is mounted in a cabinet please note that
the temperature of the AIR-INTAKE should be kept low and avoid
a short circuit in the air flow i.e. the hot air leaving the AIR-OUTLET
entering the AIR-INTAKE again.
• The storage tem perature range is –40 to +85 °C.
2)
HU MID ITY
• During nor mal op eration hu midity will not harm the power sup ply,
provided the air is not ag gressive. The heat nor mally pro duced in
the power sup ply will keep it dry.
• Con den sa tion.
Avoid con densation in side the power sup ply, break-down could
be the re sult.
Condensation can oc cur dur ing a pe riod the power sup ply is
switched off (or op erating at no load) and the am bient temperature
is in creas ing .
Always al low the power supply to dry be fore switching it on again.
3)
GAL VANIC IN DUS TRY
• For us ing the power supplies in the gal vanic in dustry it is strongly
rec om mended to take pre cau tions against an ag gres sive en vi ron -
ment.
• An ag gressive en vironment with acid, salt, etc. can harm the elec -
tronic components. Some times even the cop per traces of the
pc-boards dis solve.
• To avoid problems the power sup plies should be mounted in a rel -
ative clean room, or mounted in a cab inet re ceiving clean air with
over pressure. Or a cab inet with a heat exchanger.
MAINTENANCE
1) GEN ERAL
• The SM-series power sup plies nor mally need no main tenance or
calibration. Only care must be taken that the cool ing of the unit is
not ob structed.
2)
COOLING FAN
• The built up of dust on the im peller of the fan and the heat sink fins
depends on the en vironment. Since the fan has over-capacity
dust will not pres ent a prob lem very quickly.
• The in ternal con struction of the power sup ply is such that no dust
will reach the sen sitive con trol circuitry, only the heat sinks in a
tunnel will be cooled by forced air (see fig. 4 - 15).
• The thermal pro tection will shut down the out put in case of over -
heating, so no dam age will be done to the power sup ply.
• It is ad visable to in spect the fan and the heat sinks regularly.
fig. 4 - 15
The fan blows through an in ternal tunnel,
where the heatsinks are situated
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