25
Subject to change without notice
O p e r a t i o n o f t h e H M P 2 0 2 0 / H M P 2 0 3 0
3 Short description HMP2020 / HMP2030
The programmable 2 resp. 3 channel high-performance po-
wer supplies HMP2020 / HMP2030 are based on the classical
transformer principle, utilising a high effi ciency electronic pre-
regulator and a secondary linear voltage regulator. This design
concept stands for high output power, a compact sized housing
and high effi ciency, combined with smallest residual ripple.
According to the type of instrument there are up to 3 channels,
each electrically insulated and combinable. The HMP2030 has
two identical channels (CH1
19
and CH3
21
) with a voltage range
of 0 to 32 V. Due to the intelligent power management, 5 A can be
drawn at 16 V and 2.5 A are delivered at the full rated output voltage
of 32 V. The second channel delivers 0 to 5.5 V at 5 A. Both instru-
ments (HMP2020/ HMP2030) can likewise provide an output power
of 188 W. But besides the 5.5 V channel there is also one more 32 V
channel doubling its maximum current to 10 amps.
Fig. 3.1: HMP2020 (2 channel version)
The high resolution for set and read back values down to
1 mV/0.1 mA makes HMP an ideal solution for demanding
applications. What’s more, applying the EasyArb function, users
can form arbitrary voltage/current shapes to each channel,
mastering a minimum timing step down to 10 ms. This can be
realized as well as remote control or local control.
Fig. 3.2: Arbitrary voltage step
Due to their electrically insulated, earth free, overload and short
circuit proof outputs, they can be operated in series or in parallel
to deliver high voltage or high current output. A basic prerequisi-
te is the use of separate electronic fuses, which can be logically
combined ( FuseLink) to shut down linked channels in case of a
fault condition, according to the user’s setup (e.g. CH1 follows
CH2 and CH3 follows CH1 or CH2). Special emphasis has been
put on a comfortable and practice oriented tracking function.
If necessary, the corresponding channels are selected prior to
a voltage or current change and altered in common
Fig. 3.3: Fuse Linking aktivated
The series HMP has a 2-lines (HMP2020) resp. 3-lines
(HMP2030) LCD-Display (240 x 64 Pixel). A compact unit size
and the availability of all outputs (including sense terminals)
on the rear side facilitate the integration into 19” rack mount
systems. The HMP series is equipped with a electrically insu-
lated USB/RS-232 dual interface. Optionally, an Ethernet/USB
or GPIB (IEEE-488) interface is available.
Fig. 3.4: Outputs on the rear side enables the integration into 19” rack mount
systems
4 Operation of the HMP2020 / HMP2030
4.1 First time operation
Prior to the fi rst time operation please note and observe the
safety instructions given above!
Switching on
Turn the instrument on by pushing the POWER button
1
.
After turn-on the HMP2020/2030 will restart in the same ope-
rating mode it was in when it was switched off. All instrument
settings are stored in a nonvolatile memory and are recalled
upon turn-on. As a rule, all outputs (OUTPUT) will be disabled
upon turn-on in order to prevent inadvertent application of
voltage to a load which might destroy it by too high a voltage or
current due to settings previously stored.
4.2 Selection of channels
Select the channels by pressing the associated pushbuttons
CH1
7
, CH 2
10
or CH3
13
. After pressing the buttons the
channel LEDs will light up green. All subsequent settings will
refer to the channels selected. If no channels were selected
the LEDs will remain dark. It is recommended to fi rst set the
desired voltages and currents before the outputs will be acti-
vated simultaneously by pressing the OUTPUT button
16
. (see
Activation of channels) If the button OUTPUT
10
is activated it
will light up white.
