POWER CORD LENGTH VERSES OUTPUT
PERFORMANCE
Portable x-ray units, both single phase and High Frequency (HF) output
types are very sensitive to power supply line voltage and line current
variations. Constant output HF portable units require approximately 40%
more line power in regards to increased current demand than pulsating
output single phase units. Line voltage compensators either manual or
automatic are built into all portable x-ray units. High Frequency units
are more sensitive to current shortages than single phase units.
Some HF units have additional circuitry to allow
operation during very weak line current and line voltage conditions.
Line power compensators for portable x-ray units operate
on four basic principles.
1 ) Manual Voltage Compensation. Static line voltage
adjustment .
Input line voltage is
manually adjusted to match x-ray unit source voltage requirements.
2 ) Automatic Voltage Compensation. Automatic line
voltage adjustment only .
Input line voltage is
automatically adjusted and maintained to match x-ray unit source voltage
requirement.
3 ) Automatic Voltage plus line current compensation,
with variable exposure time output.
Input line voltage is automatically
adjusted and maintained to match x-ray unit source voltage requirements
even during weak and varying line conditions such as while operating on
long length extension cords. Line current is also monitored and the
units output exposure time is automatically lengthened when an exposure
has occurred during a low line current situation. Operating on low line
currents will produce a lowered mA output exposure but by lengthening
the exposure time a calibrated mAs and kVp exposure output will be
maintained.
4) Automatic Dynamic Voltage plus line current
compensation, with variable power storage and release capacitors.
Input line voltage is
automatically adjuster and maintained to match x-ray unit source voltage
requirements even during weak and varying line conditions such as while
operating on long length extension cords. Line current is also monitored
and the units output frequency is automatically adjusted to match the
maximum power handling capabilities of the line. Thus producing a
calibrated mA, time and kVp exposure output.
| 1-800-346-9729 |
www.vetxray.com |
Sales@vetxray.com |
Diagnostic Imaging Systems,
Inc.
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