GENERAL INFORMATION:
The “HV Rack” power system is a
fully featured, configurable chassis, enabling
end users to select and to specify the UltraVolt
high-voltage power supply (HVPS) operating
in each channel from UltraVolt's catalog of
more than 400 models. This combination provides
accurate control and measurement of high-voltage
power supply and HV system performance.
FRONT PANEL:
The “HV
Rack” system
can provide
up to 4
channels
of high-voltage
power.
Each channel
has full
front-panel
control
of voltage
and current
as well
as monitoring
and preset
capability.
In addition
to the
individual
channel
controls,
there is
a main
power switch
that will
disconnect
the AC
line and
a 'remote'
indicator
to show
when the
rear panel
remote/local
control
selection
switch
is in the
'remote'
position.
METERING:
Each channel has a 4½-digit LED meter
to indicate the actual output voltage. The
output-voltage signal is derived from the
HV monitor on the UltraVolt power supply
and is scaled and calibrated to within 1%
of full scale. The current is displayed on
a 3½-digit LED meter and is derived
from the current monitor in the UltraVolt
power supply. The current monitor is nulled
to eliminate any offsets, scaled, and calibrated
to within 1% or 5% of full scale, depending
on the models in that channel.
Each meter has illuminated
indicators for scale factor. These indicators
will display either “Volts” or “Kilo
Volts” above the voltage meter and “Amps,” “Milli
Amps,” or “Micro Amps” beneath
the current meter. These indicators are
factory set and are configured depending
upon the UltraVolt model installed in each
channel. The indicators are illuminated
whenever the chassis main power is on.
PRESET:
Each
channel
has
a
momentary,
push-button “Preset” switch.
When
this
switch
is
pressed
and
held,
the
meters
will
read
the
programming,
or
set
points,
for
the
voltage
and
current.
When
released,
the
meters
revert
back
to
monitoring
the
actual
output.
This
function
is
operational
whether
the
HV
is
disabled
or
enabled.
It
provides
the
capability
to
set
or
to
verify
set
points
for
current
and
voltage
before
and
during
high
voltage
operation.
VOLTAGE AND CURRENT
PROGRAMMING:
Each channel has a set of 10-turn locking
controls to set the voltage and current
programming levels. These are the set points
at which the unit will operate once the
enable signal is given.
Each channel has illuminated
indicators to show when the unit is in “Voltage
Regulation” or “Current Regulation”.
The “HV Rack” system has automatic-crossover
capability, which is determined by the
levels at which the user has set the voltage
and current programming and by the loading
conditions. These indicators are unlit
when the unit is disabled.
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ENABLE:
Each channel has a latching, enable push-button
switch that is illuminated. Push the button
to enable/disable (ON/OFF) the high voltage
output for that channel.
When the power supply is in “Remote” mode
and is given an enable signal to turn on
the high voltage, the switch will light up.
REMOTE CONTROL:
“HV Rack” Series units
are equipped with remote control capability
via a rear-panel, 37-pin, ‘D’ female
connector (metal shell connected to the chassis);
a remote/local selector switch; and a green,
power-on, LED indicator. The 37-pin connector
provides a full set of control functions
for each of the HV Rack system’s four
channels. The current and voltage monitors
are present at all times. Enable, voltage
programming, and current programming for
all channels are accessible when the remote/local
switch is in the “Remote” position.
In addition, there is a global disable signal,
which will disable all channels at the same
time. For a more complete description of
the rear-panel interface, control, and function
please see the Diagram
C: Rear Panel. Optional USB control is available - see the Accessories & Connectors data sheet.
CHASSIS:
The “HV Rack” power supply’s
chassis is equipped with PEM nut-mounting
patterns on both sides to support standard
rack slides. The “HV Rack” system
can also be placed in a standard rack drawer
or used independently on the bench top with
the 5 supplied rubber feet. Note, the unit
is designed to be cooled via a combination
of convection and forced air; therefore,
it is important not to block the air vents.
The AC input operates
through an EMI/RFI-filtered, IEC 320/614
compatible power entry module.
The unit is equipped with one to four 300W
AC-to-DC, low-voltage power supplies (LVPS)
depending on the model ordered. Each LVPS
can power UltraVolt units up to 250 watts
of output power.
The “HV Rack” power system has
a master AC power switch on the back panel,
which will cut AC power to the “HV
Rack” system. This switch must be on
for the front panel power switch to be active.
The AC power is also fused through a 5mm
x 20mm fuse located on the back panel.
ENVIRONMENT:
The “HV Rack” Series power systems
can operate at full power at case temperatures
from -40 to +65°C. All units receive
a 24-hour burn-in prior to final test. Other
enhanced capabilities are available. Please
contact the factory.
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