DF3/FF3 MANUAL
2
118018-001
Rev E
Line Regulation: 0.005% of rated
output over specified input range.
Temperature Coefficient:
50 ppm/˚C (20
ppm/˚C optional).
Long term Stability:
0.01% / 8 hours.
Current Regulation:
Load regulation: 0.01% of rated
output for a 10-60kV change.
Line regulation: 0.005% of rated
output over specified input range.
Temperature Coefficient:
50 ppm/C
Long term Stability:
0.01% / 8 hours.
Ripple:
0.03% below 1kHz, 0.75% rms above
1kHz.
Filament Voltage:
14Vac (dc filament
optional).
Filament Current:
12A ac.
Size:
5 ¼” (13.26cm)H x 19” (48.26cm)W x
22” (55.88cm)D.
1.4
STANDARD FEATURES
The DF3/FF3 series incorporates extensive
standard features designed to optimize user
control 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 10 seconds. The
filament current is slowly increased until the
desired mA level is achieved. This time is
typically 20 seconds for full mA output. These
ramp conditions are started at the initial X-RAY
ON control signal or when the kV control,
(front panel potentiometer or remote
programming), drops below the kV MIN level.
The kV MIN level is typically set at 8kV. The
kV MIN level is adjustable by an internal
resistor valve. Other kV MIN levels can be
accommodated. Consult Spellman Engineering
for further information.
FAIL-SAFE, DUAL INDICATOR LAMPS:
The X-ray on lamp utilizes a sensing circuitry for
detecting proper operation of the lamp for the
indicator. If the X-ray on lamp is not functioning,
the power supply will not generate high voltage. If
the X-ray on lamp is depressed and the indicators
do not illuminate, the lamps are defective and
should be replaced in order to generate high
voltage. Control power and X-ray off lamps are
also dual type lamps for added reliability.
INTERNAL FAULT PROTECTION AND
DIAGNOSTICS:
The DF3/FF3 series
continually monitors internal circuits critical to
the proper operation of the power supply and X-
ray tube. The diagnostic circuits utilize
sophisticated Programmable Logic Devices
(PLD’s). The diagnostic programming is a
software based, decision-making technology.
Flexible software provides very sophisticated
decision-making capabilities within the power
supply. Also, a variety of user configurations can
be achieved by custom software written by
Spellman Engineering. If a specific fault
condition or diagnostic is required, consult
Spellman High Voltage Engineering Department.
1.4.1 REMOTE
OPERATING
FEATURES
REMOTE PROGRAMMING:
Allows remote
adjustment of the output voltage, output current,
filament current limit, and maximum tube power
via an external voltage source.
REMOTE MONITOR:
Allows remote
monitoring of the output voltage and output
current.
REMOTE X-RAY ON/OFF CONTROL:
Allows remote control of X-ray ON and X-ray
OFF functions. Signals are also provided for
remote indication of X-ray ON status. This can be
used for a variety of water control or remote lamp
functions.
REMOTE POWER ON:
Allows remote control
of Control Power ON/OFF function. This feature
also allows remote reset of the power supply in
case of a fault shutdown.
EXTERNAL INTERLOCK:
Interlock
connections are provided for a variety of water
flow and safety functions. The unit will not
operate unless the interlock is closed. Opening the
interlock circuit will cause the unit to shut off.
Содержание DF3 Series
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