XRM MANUAL
2
118032-001 REV G
1.3 Standard Features
The XRM 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 4 seconds. The
filament current is slowly increased until the desired mA
level is achieved. This time is typically 4 seconds for full
mA output. These ramp conditions are started at the
initial INTERLOCK CLOSED control signal.
INDICATOR LEDS:
HIGH VOLTAGE OFF, HIGH
VOLTAGE ON and POWER ON indicators.
OUTPUT CABLE:
Standard units are provided with a 1
meter 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
front of the chassis. For non-standard units, see Spec.
Control drawing.
1.3.1 Remote Operating Features
REMOTE MONITOR:
Allows remote monitoring of
the tube voltage and tube emission current
EXTERNAL INTERLOCK:
Interlock connections are
provided on J4-4 on the front of the chassis for
connection to a safety switch. The unit will not operate
unless the interlock circuit is closed through a 12V lamp
rated for 0.5W to 0.8W. During high voltage operation,
opening the interlock circuit will cause the High Voltage
to shut off. This option should be used for safety
interlock circuits. The lamp can be replaced with a 270
Ohm, 1 W resistor if fail-safe interlocking of the X-ray
On is not required.
1.4 Options
CODE DISCRIPTION
•
AC
AC Filament
•
SS(X)
Non-Standard Slow Start
•
NSS
No Slow Start
•
BIAS
Bias Supply
•
CPC
Constant Power
•
ATP
Alternate Test Point Scaling
•
LL(x)
Extra Length Output Cable (in meters)
Table 1.1 XRM Options
The options available are listed in Table 1.1. See Section
5 for more information on these options along with
operating and set-up instructions. With few exceptions,
these options and modifications can be retrofitted to your
power supply at the factory in a short time. For price and
retrofit arrangements, contact Spellman’s Sales
Department.
1.5 Interpreting the Model
Number:
The model number of the power supply describes its
capabilities. After the series name is:
(1) the maximum voltage (in kV)
(2) the maximum output (in watts)
(3) the option codes for all options that are included.
Custom units have an X number after the option codes.
XRM 30 P 50/ BIAS / X(#)
Series
Name
Voltage
Maximum
Polarity
Option
"X" Number
Custom
Power
Maximum
