SM3000 OPERATING - TROUBLE SHOOTING - CALIBRATING
rev. February 2018 DELTA ELEKTRONIKA B.V. Page 4 - 1
4 OPERATING MANUAL
1) OP ER ATING THE UNIT FOR THE FIRST TIME
• Check that there is no con den sa tion on the unit. If there is, al low
some time to dry.
• Set the pro gram switches on the rear panel on MAN UAL.
• Check that there is a link be tween + and S+ and be tween – and
S– on the SENSE BLOCK (on rear panel)
• Set OVP po ten ti om e ter (on front panel) to max i mum (fully clock -
wise), Use a screw driver to set the OVP volt age.
• With high out put cur rent make sure to use low re sis tive con -
nec tions be tween the power sup ply and the load:
- Mount the ca ble lugs di rectly on the tinned out put strips
fol lowed by a washer and a nut (see fig. 4 - 1). Al ways in
this or der!
- Never place ex tra wash ers be tween the lugs and the strips!
- Only use nuts and wash ers sup plied with the unit.
• Switch on unit.
• Turn both the CV and CC po ten ti om e ter a few turns clock wise. A
volt age should now be pres ent on the out put.
• By press ing the DIS PLAY CV/CC SETTING but ton the me ters
will show the set ting of the CV and CC po ten ti om e ter.
• By press ing the DIS PLAY OVP SETTING but ton the volt me ter
will show the set ting of the OVP po ten ti om e ter.
• When the power sup ply is used on a fixed out put volt age it is
highly rec om mended to set the Over Volt age Pro tec tor. As set
out in the fol low ing ta ble:
SM15-200D SM30-100D SM45-70D SM70-45D SM120-25D SM300-10D
Vout + 2 V Vout + 3 V Vout + 5 V Vout + 5 V Vout + 10 V Vout + 25 V
Ex am ple: For a SM30-100D set at 24 V out put volt age it is rec om -
mended to set the OVP on 24 + 3 = 27 V.
• Check that the cool ing of the unit is not ob structed.
2) AN A LOG PRO GRAMMING
• Put the ap pro pri ate switch(es) in the po si tion PRO GRAM.
• Con nect the pro gram ming volt age source(s) (0 - 5 V) to the AN A -
LOG PROG. CON NEC TOR on the rear panel (see fig. 4 - 2 and
fig. 4 - 3). Al ways use a shielded ca ble for pro gram ming.
• If only the volt age is pro grammed, the max i mum cur rent can still
be set with the CC po ten ti om e ter and vice versa. If this is not de -
sir able the CC or CV can be set with an ex ter nal po ten ti om e ter, in
or der to have a fixed set ting.
• CAU TION: The an a log in puts are not iso lated from the out put.
The Ø of the prog. in put (pin 1) is in ter nally con nected to the S–,
the S– is con nected to the neg a tive out put. To pro tect the in ter nal
wir ing a 650 mA self-re set ting fuse is con nected in se ries (F600
on P432) (see fig. 3 - 10).
• For iso lated an a log pro gram ming the ISO AMP CARD (δ-prod -
uct) is rec om mended to avoid earth loops.
• To avoid hum or noise, the pro gram ming ca ble may have to be
twisted in some cases.
• To pro gram the unit by cur rent in stead of volt age, sim ply use a
par al lel re sis tor as a cur rent to volt age con verter.
3) IEEE488 / RS232 PRO GRAMMING
• Set both prog. switches to the po si tion pro gram.
• Both CV and CC can be pro grammed and read back. The CC and
OVP sta tus can also be read by the com puter.
4) MON I TORING OUT PUTS
• The 5 V level is com pat i ble with most in ter faces.
• The mon i tor ing out puts can drive a me ter di rectly (see fig. 4 - 4).
fig. 4 - 1
Low re sis tive ca ble con nec tion by mount ing the
ca bles di rectly on the tinned out put strips
fig. 4 - 2
Pro gram ming by volt age:
left volt age -, right cur rent pro gram ming
fig. 4 - 3
Pro gram ming by cur rent
left volt age -, right cur rent pro gram ming
fig. 4 - 4
Re mote con trol
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