XLG/XLF MANUAL
2
118020-001 REV E
1.3 Standard Features
The XLG/XLF series incorporates several standard
features designed to optimize user satisfaction and safety.
KV AND MA/FILAMENT CURRENT RAMP
CIRCUITS:
This feature provides for a gradual rise for
kV, mA and filament current. This feature is designed to
limit voltage shock and filament shock to the X-ray tube.
The kV ramp rate is approximately 6 seconds. The
filament current is slowly increased until the desired mA
level is achieved. This time is typically 5 seconds for full
mA output. These ramp conditions are started at the
initial HV ON control signal.
ARC DETECT / ARC QUENCH / ARC COUNT:
These features allow the user to tailor the power supply to
meet specific needs in dynamic load applications. If an
arc occurs, the output is inhibited for approximately one
second, then the output is ramped up to the preset level
with the Slow-start circuitry. See Chapter 3 for operating
details and information for user customization for these
features.
INTERNAL FAULT PROTECTION:
The XLG/XLF
series continually monitors internal circuits critical to the
proper operation of the power supply.
In the event that
one of these circuits does not function correctly, the fault
detection circuit latches the appropriate fault on the front
panel display and turns off the outputs and reverts the unit
to the POWER DOWN mode.
INDICATOR LAMPS:
HIGH VOLTAGE OFF and
HIGH VOLTAGE ON indicators.
OUTPUT CABLE:
XLG models are provided with a
ten foot shielded high voltage output cable. The cables
are designed with a plug arrangement so that they can be
easily removed from the mating receptacle located on the
rear of the chassis. internal EMI filter and fuse provide
protection against line voltage surges and power supply
faults.
1.3.1 Remote Operating Features
REMOTE PROGRAMMING:
Allows remote
adjustment of the output voltage and current via an
external voltage source. The output power is also
remotely controllable when the CPC or APT option is
ordered.
REMOTE MONITOR:
Allows remote monitoring of
the tube voltage and tube emission current. NOTE:
Output power remote monitor is included with the CPC
and APT options.
REMOTE HIGH VOLTAGE CONTROL:
Allows
remote control of the HIGH VOLTAGE ON and HIGH
VOLTAGE OFF functions. Signals are also provided for
remote indication of HV ON or HV OFF status.
EXTERNAL INHIBIT:
A circuit that will inhibit the
high voltage output is provided of the 25 pin mini-D
connector on the rear of the chassis. A logic low, ground,
will inhibit the high voltage output and a logic high, open,
will restore the high voltage output to the preset level.
NOTE: The External Inhibit circuit should
NOT be used for protection against injury or for safety
interlock. See External Interlock for this type of safety
control
EXTERNAL INTERLOCK:
Interlock connections are
provided on the terminal block on the rear of the chassis
for connection to a safety switch. The unit will not
operate unless the interlock circuit is closed. During high
voltage operation, opening the interlock circuit will cause
the High Voltage to shut off. This circuit should be used
for safety interlock circuits.
1.3.2 System Status and Fault
Diagnostic Display
“Dead Front” type indicators are provided to give the user
complete indication of system operation and fault
conditions. If a fault occurs the power supply will revert
to the POWER DOWN mode. This is indicated by both
the HV ON and HV OFF lamps turning off. To reset,
depress the HV OFF switch.
VOLTAGE (CONTROL):
Indicates the output voltage
regulator circuit is maintaining voltage regulation.
CURRENT (CONTROL):
Indicates the output current
regulator circuit is maintaining current regulation.
POWER (CONTROL):
Indicates the output power
regulator circuit is limiting tube power (optional).
HV INHIBIT:
Indicates the high voltage supply is being
inhibited by either the EXTERNAL INHIBIT or internal
protection circuitry.
INTLK CLSD:
Indicates the EXTERNAL
INTERLOCK connections are in the closed position.
This also indicates closure of internal power supply
interlocks.
INTLK OPEN:
Indicates the EXTERNAL
INTERLOCK connections are in the open position. This
also indicates opening of internal power supply
interlocks.
