XRM MANUAL
1
118032-001 REV G
Chapter 1
I
NTRODUCTION
1.1 Description of the XRM Series
he XRM series of high voltage power supplies
represent an advanced approach to X-ray generator
power requirements. These power supplies provide
all the power, control, and support functions required for
practically all X-ray applications. The XRM series
provide high voltage, high current outputs with very low
ripple. Extremely stable voltage and current outputs
result in significant performance improvements over
previously available technology. Low output ripple
provides higher intensity levels, with no increase in tube
loading.
All these advancements are possible only by Spellman’s
long history in X-ray power systems. This series of
power supplies utilize extremely advanced resonant
conversion techniques, along with sophisticated digital
technology.
The XRM series is specifically designed for X-ray tube
application where the high voltage is a positive polarity,
and the filament circuits are referenced to the cathode
ground potential, (grounded filament).
The X-ray tube voltage and tube emission current are all
continuously adjustable.
The power supplies operate from +24Vdc and are
convection cooled for 0 to 50W models. Custom
designed units for single use or OEM applications are
available.
1.2 XRM Specifications
Output Control
:
Voltage and current are continuously adjustable over
the entire range from zero to maximum rating via a
twenty-turn potentiometer.
Input Voltage:
24Vdc ± 10%
Voltage Regulation:
Load regulation: 0.01% of full voltage for a no
load to full load charge.
Line regulation: 0.01% of full voltage over
specified input voltage range.
Current Regulation
:
Load regulation: 0.01% of full current from 0 to
rated voltage.
Line regulation: ±0.01% of full current over
specified voltage range.
Ripple:
0.25% p-p of maximum output voltage.
Filament:
3.5A, 5.5V
Stability:
0.05% per 8 hours after ½ hour warm up.
Temperature Coefficient:
0.01% per ºC. Higher
stability available on special order.
Ambient Temperature:
0ºC to 50ºC operating.
-20ºC to 85ºC storage.
Weight:
10.5 lbs. (4.8kg).
Size:
3.937”H x 6.3”W x 10.0”D.
(10 x 16 x 25.4cm).
T
