Spellman DXM100 Series, Инструкция по эксплуатации

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DXM100 MANUAL 7 118147-001 Rev. D
Figure 3.1 Proper Grounding Technique
3.1.1 X-ray Tube Operation
The X-ray tube should be operated according to the X-ray
manufacturers specifications. Filament Limit program
and Filament Preheat program shall be set so not to
exceed maximum filament current as per the X-ray tube
manufacturers specifications. X-ray tube seasoning
schedules and kV ramp profiles should also be per the X-
ray tube manufacturers specification.
Set Filament Limit: One of the most critical settings is the
Filament Limit adjustment. The Filament Limit set point
limits that maximum output current of the filament power
supply to protect the filament of the X-Ray tube. This
setting will make it impossible for the X-Ray generator to
exceed this value under any circumstance. It should be set
at or below the X-Ray tube manufacturer’s specification.
Filament Limit program scaling is 0 to 10Vdc = 0 to 5
amps.
When setting the Filament Limit below the maximum X-
Ray tube specification, the Filament Limit should be 10-
15% higher than the filament current required to achieve
the maximum programmed emission current (mA) at the
lowest kV setting to be used. Remember, filament
maximum values are different than the REQUIRED values
for emission. Setting 10-15% over the needed emission
current values provides headroom as well as better trainset
response characteristics.
Always keep the Filament Limit level at or below the
manufacturers recommended maximum filament
current specification.
Set Filament Standby (Preheat): The Filament Standby
current (referred to as Filament Preheat on some product
lines) is the idle current supplied to the X-Ray tube
filament during X-Ray Standby (HV OFF/X-Ray
disabled) conditions.
Filament Standby programing scaling is 0 to 10Vdc = 0 to
2.5 amps.
The Filament Preheat set point is typically around 1 amp
to 2 amps, but the X-Ray tube manufacturer should be
consulted. A good guideline to consider is the maximum
Filament Preheat level should be limited to 50% of the
Filament Limit specification. It is perfectly fine to set
standby current to zero if fast emission current ramping is
not required.
For additional information please visit this
link .
3.2 Standard Features
A note on remote interface circuitry and remote signal
grounding: whenever possible, electrical isolation should
be provided when interfacing with any high voltage power