4
TURNING ON
* REMOTE switch turns to „OFF“ position
- local control mode
* All potentiometers move to the left zero position
- only advice, it’s not strong
demand
* Disable OUTPUT switch move to „ON“ position
- its not strong demand
* Connect a load
- it’s not necessary
* Cable plug insert to a socket
* Switch on the mains switch – position „ON“
(mains switch indicator and both LED displays light on)
* Set assumed current limitation by potentiometers
- in CV mode
(ROUGHLY or FINE)
* Set desirable output voltage on the both displays
may be observed real date of the voltage or current
* Set assumed max. voltage depending on the max.
- in CC mode
load resistance and max. constant current
* Set desirable constant current within constant
current range
During operation in CV or CC mode an output power supply may be interrupted and restarted again
by the disable OUTPUT switch.
TURNING OFF
It’s recommended to turn the load off, first by the disable OUTPUT switch and to remove wires from
the output terminals. Than the mains switch may be turned off. Unit may be switched off directly by
the mains switch at any operating condition.
MAINTENANCE
Power Supply SPS 1000 normally needs no maintenance or calibration. Only care must be taken not
to obstruct cooling of the unit. When a unit is equipped by a dust filter, which must be cleaned or
changed for a new one at the least once per year. The built-up of dust on the impellers of the fans and
the heat sinks fins depends on the environment. Since the fans have over-capacity dust will not
present a problem very quickly. The internal construction of the power supply is such that no dust
wouldn’t reach the sensitive control circuit. There may occur a dust between the heat sink fins. It is
advisable to inspect the fans, heat sinks as well as all units regularly.
IMPORTANT ADVICE AND CAUTION
- Electric strength (EDV) tests should not be repeated in the field. Improper test methods can cause
severe damage to the power supply. Electric strength and earth continuity tests have been performed
in the factory on each unit. The 4000V
rms
cannot be tested afterwards on the assembled unit because
the insulation between the components on the input side to the case is specified at 2000V
rms
. Since
the insulation output-case is low (only 500V DC due to fans) the insulation of the primary
components to case will break down when 4000V
rms
is applied between input and output
