SM3000 OPERATING - TROUBLE SHOOTING - CALIBRATING
rev. February 2018 DELTA ELEKTRONIKA B.V. Page 4 - 5
OPERATING AND STORAGE CONDITIONS
1) TEM PER A TURE
• The op er at ing tem per a ture range at full load is –20 to +50 °C.
But this tem per a ture range only holds when the AIR-IN TAKE and
AIR-OUT LET are un ob structed and the tem per a ture of the
AIR-IN TAKE is not higher than +50 °C.
• Please note: a lower tem per a ture ex tends the life of the
power sup ply.
• When the power sup ply is mounted in a cab i net please note that
the tem per a ture of the AIR-INTAKE should be kept low and avoid
a short cir cuit in the air flow i.e. the hot air leav ing the AIR-OUTLET
en ter ing the AIR-INTAKE again.
• The stor age tem per a ture range is –40 to +85 °C.
2) HU MID ITY
• Dur ing nor mal op er a tion hu mid ity will not harm the power sup ply,
pro vided the air is not ag gres sive. The heat nor mally pro duced in
the power sup ply will keep it dry.
• Con den sa tion.
Avoid con den sa tion in side the power sup ply, break-down could
be the re sult.
Con den sa tion can oc cur dur ing a pe riod the power sup ply is
switched off (or op er at ing at no load) and the am bi ent tem per a ture
is in creas ing .
Al ways al low the power sup ply to dry be fore switch ing it on again.
3) GAL VANIC IN DUS TRY
• For us ing the power sup plies in the gal vanic in dus try it is strongly
rec om mended to take pre cau tions against an ag gres sive en vi ron -
ment.
• An ag gres sive en vi ron ment with acid, salt, etc. can harm the elec -
tronic com po nents. Some times even the cop per traces of the
pc-boards dis solve.
• To avoid prob lems the power sup plies should be mounted in a rel -
a tive clean room, or mounted in a cab i net re ceiv ing clean air with
over pres sure. Or a cab i net with a heat exchanger.
MAINTENANCE
1) GEN ERAL
• The SM-series power sup plies nor mally need no main te nance or
cal i bra tion. 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 pel ler of the fan and the heat sink fins
de pends on the en vi ron ment. Since the fan has over-capacity
dust will not pres ent a prob lem very quickly.
• The in ter nal con struc tion of the power sup ply is such that no dust
will reach the sen si tive con trol cir cuitry, only the heat sinks in a
tun nel will be cooled by forced air (see fig. 4 - 15).
• The ther mal pro tec tion will shut down the out put in case of over -
heat ing, so no dam age will be done to the power sup ply.
• It is ad vis able to in spect the fan and the heat sinks reg u larly.
fig. 4 - 15
The fan blows through an in ter nal tun nel,
where the heatsinks are sit u ated
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