Delta Elektronika SM 30-200 - Meter Calibration; Spe Cial Cal I Bra Tions

SM6000 DELTA ELEKTRONIKA BV
July 2003, rev. May 2008 OPERATING MAINTENANCE TROUBLE SHOOTING CALIBRATING Page 4 - 8
CALIBRATION
1) GEN ERAL
• The power supplies are factory calibrated
and nor mally need no further cal ibration.
Only in spe cial sit u a tions (for ex am ple af ter
repairing a unit) calibration can be nec es-
sary.
2)
METER CAL I BRA TION
• DIG I TAL ME TERS
The full scale in dication can be calibrated
with R25_31 and R25_36 on P596 (see
fig. 4 - 17).
3)
SPE CIAL CAL I BRA TIONS
• The fol lowing cal ibrations must be done by
qual i fied per son nel only. Wrong cal i bra tion
causes mal func tion. These cal i bra tions are
only needed af ter spe cial re pairs.
Warn ing ! Dam age caused by wrong
cal i bra tion is not war ranted.
• CAL I BRATING THE CUR RENT
MON I TOR OFF SET.
With R26_73 on P597 the offset of the CC
monitor voltage can be cal ibrated (see fig.
4 - 18). The unit has to be un loaded, the out-
put voltage has to be turned off us ing the
OUTPUT ON/OFF button. Mea sure the off-
set voltage of the CC monitor on the pro -
gram ming con nec tor. Cal i brate the off set on
a neg ative value be tween –1 mV and zero
mV.
Warn ing! wrong cal ibration can dam age
the unit.
• CAL I BRAT ING MAX. CUR RENT RANGE
or CAL I BRAT ING CC MON I TOR FULL
SCALE.
Short the out put us ing a low re sistive ca ble.
Measure the output cur rent with an ac curate
shunt. The max imum out put cur rent can be
cal i brated with R26_41. R26_41 is lo cated
on P597 (see fig. 4 - 18).
Program CC in put with exactly 5.00 V.
Set output voltage to a high value, en suring
the power sup ply is in CC mode. Cal ibrate
the cur rent with R26_41 ex actly on the rated
max i mum cur rent.
Warn ing! Wrong calibration can dam age
the unit.
fig. 4 - 17
Me ter cal i bra tion with 25-turn potmeters on P596
fig. 4 - 18
Cal i brat ing max. cur rent and off set on P597
full scale
offset