Universal APX 525 Operation manual

This manual contains information
for the operation, installation,
and maintenance of the APX 525 & 625 Generator
Do Not Discard
Revison Date: 7/5/2005 8000-APX 525/625 Revision C
APX 525 and 625
X-Ray Generator
Operation and Service Manual
Anatomically Programmed Version (APR)

In the event of a malfunction that could, or has contributed to a patient or
operator injury, please contact:
In North America
Del Medical Imaging Corporation
11550 West King Street
Franklin Park, IL 60131
Tel: [phone]
Toll Free Tel. [phone]
Fax: [phone]
In Europe
Villa Sistemi Medicali
via delle Azalee 3
20090 Buccinasco (MI)
Italy
Tel: [phone]
Fax: [phone]

Revision History
Revision Date Comments
A 12/12/2002 Initial Release
B 6/24/2003
C 7/5/2005
•Added APX 625 (40kW version) specifications
throughout manual.
•Updated instructions for installing in-line
transformers.
•Added note to Operating Instructions regarding
recording and saving password.
•Added logo to title page.
•Added metric equivalent dimensions where
missing.
•Updated assembly drawings to current revision
level.
•Updated cable part numbers for in-line
transformer.
•Added dimension specifications for wall mount
bracket and pedestal.
•Added small filament resistor adjustment to
calibration.
•Added Section “Using Del APR Utility to Manage
APR Databases”

MANUAL IMPROVEMENT RECOMMENDATION
We at Del Medical Imaging Corporation
are most interested in improving the
quality of the Technical Documentation
we provide. Please identify
improvements or corrections and fax
them to our Technical Publications
Department.
Name________________________________________________
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Recommendation or Correction_____________________________________
________________________________________________________________
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Technical Support [phone]
Toll Free Tel. [phone]
Fax [phone]

APX 525/625 Generators Revision C Table of Contents
© 2005 Del Medical Imaging Corporation 7/5/2005 Page i
Table of Contents
INTRODUCTION........................................................................................................1
Damage in Transportation ...............................................................................1
X-Ray Protection..............................................................................................1
X-Ray Equipment Safety Recommendations...................................................2
Electrical Grounding.........................................................................................2
X-Ray Tube......................................................................................................2
Features and Benefits of the APX 525 and 625...............................................3
OPERATING MANUAL..............................................................................................5
Introduction ......................................................................................................5
Power On/Off Procedure..................................................................................7
APX Control Console Description ....................................................................8
Mode Selection ...................................................................................10
Setting Default Startup Parameters..........................................11
Prep and Expose......................................................................11
Using the Rotational Knob........................................................11
Multi-function Buttons...............................................................12
X-Ray Tube Anode Heat Display ........................................................12
Basic X-Ray Procedures................................................................................12
Manual Mode ......................................................................................12
AEC Mode...........................................................................................13
APR MODE.........................................................................................14
Daily X-Ray Tube Seasoning Procedure .......................................................16
Fault Indications.............................................................................................16
Specifications.................................................................................................18
AEC.....................................................................................................19
Compatibility Listing ............................................................................20
X-Ray Tube Assemblies......................................................................20
System Weights And Dimensions .......................................................21
D.H.H.S. Compliance ..........................................................................24
Preventive Maintenance ................................................................................24
User Service and Maintenance ...........................................................25
Safety Information ...............................................................................25
X-Ray Generator Maintenance............................................................26
PRE-INSTALLATION...............................................................................................27
Pre-Installation Planning ................................................................................27
Wiring Requirements...........................................................................27
Identification of Incoming Line .......................................................................28
Grounding.................................................................................29
Single Phase Installations (APX-525 Only)....................................................29
Making Connections (Single Phase)..............................................................31
Connecting 208 VAC Single-Phase Power (636-0021P2) Transformer31
Making Connections (Single Phase)..............................................................40
Connecting 240 VAC Single-Phase Power (636-0021P2) Transformer40
Three Phase Installations ..............................................................................49

APX 525/625 Generators Revision C Table of Contents
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Connecting 208 VAC Three Phase Power (30 kW Only) (636-5010P1
Transformer) .......................................................................................56
Connecting 480 VAC Three Phase Power (30 kW & 40kW) (636-
5010P1 Transformer) ..........................................................................69
Connecting 208 VAC Three Phase Power (40 kW Only) (636-0070P1
Transformer) .......................................................................................83
Cable Index ..............................................................................97
Cable Index Notes....................................................................97
Modifications..................................................................................................99
AEC Chassis Modifications .................................................................99
Line Match Transformer ......................................................................99
INSTALLATION.....................................................................................................100
Rack Mounted APX 525/625 X-Ray Generator.................................100
Generator Interconnections...............................................................101
Power Module ........................................................................101
Exposure Interlocks................................................................101
Filament Connections to High Tension Transformer (Cable
#126-0178G1) ........................................................................101
Filament ConnectionsPlug Connections to Power Module .....101
Plug Connections to Power Module .......................................102
Stator Connections.................................................................102
Wall Image Receptor Connections .........................................102
Table Image Receptor Connections .......................................103
Connections from Line Match Transformer to Power Module.103
SERVICE ADJUSTMENTS....................................................................................104
Start Up, Operational Check and Calibration Procedure .............................104
General Notes...................................................................................104
Component Identification ..................................................................106
Pictorial Diagrams ..................................................................106
Adjustment Pot Identifications...........................................................122
Generator Start Up Operational Tests and Installation Set-Up .........122
Test Equipment Required.......................................................123
Inspection of High Tension Transformer ................................123
Inspection of Power Module ...................................................124
Inspection of Controller ..........................................................124
Operational Testing ................................................................124
Programming the Default System Configuration Menu ..........126
X-Ray Tube Assemblies....................................................................128
APX X-Ray Calibration Procedure ...............................................................130
Test Equipment Required: ................................................................130
Initial Test Exposure..........................................................................132
Dynalyzer / Scope Setup ........................................................133
Calibrate mA .....................................................................................134
Initial Setting of Preheat Pots .................................................135
Calibrate mAs....................................................................................137
Initial Voltage to Frequency Calibration..................................137
Long Exposure mAs Calibration .............................................138

APX 525/625 Generators Revision C Table of Contents
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Calibrate kV ......................................................................................138
Calibration Verification ......................................................................140
Alternate Calibration Procedure...................................................................141
kV Calibration....................................................................................145
mAs Adjustment ................................................................................145
mAs Adjustment - Alternate Method without Dynalyzer™............................146
mAs Calibration.................................................................................146
mA Fault Calibration ....................................................................................147
.....................................................................................................................148
Additional Optional Inspections....................................................................149
Calibrate High Tension Transformer Balance ..............................................149

APX 525/625 Generators Revision C Table of Contents
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Calibration of SCR Hold Off Time ................................................................149
Boost Time Adjustment................................................................................150
AEC Inspection and Calibration ...................................................................151
AEC Cable Interconnections........................................................................151
Connections for Ion Chambers on Main AEC Board .........................151
AEC Communication Link Checkout .................................................152
AEC Device Field Calibration Procedure ..........................................154
Required equipment: ..............................................................154
Calibration Procedure.............................................................155
Preliminary Gain Adjustments...........................................................156
For the Table Image Receptor................................................156
For the Wall Image Receptor..................................................156
kV Compensation Adjustments .........................................................157
Secondary Gain Adjustments .................................................159
Back-Up Timer Test ...............................................................159
Maintenance...........................................................................159
SCHEMATICS........................................................................................................162
DIAGNOSTICS.......................................................................................................163
Troubleshooting Topics for the APX 525/625 Generator .............................163
No Ready Light .................................................................................163
Ready Light is Active, but No Exposure Occurs................................164
kV Faults ...........................................................................................165
Category I - Consistent kV Fault.............................................166
Category II - Intermittent kV Fault...........................................169
No Load Test..........................................................................173
Long Exposure Times with Light Films..............................................174
Long Exposure Times with Dark Films..............................................174
Apparent Small Focus Open Filament Condition ..............................174
No mA Feedback ..............................................................................174
No kV Feedback or Improper kV Feedback ......................................174
Theory of Operation.....................................................................................175
USING THE DEL APR UTILITY TO MANAGE APR DATABASES......................187
Installation of the program ...........................................................................187
Necessary Hardware ...................................................................................188
Operating the program.................................................................................188
Initial optimization of the APR database ......................................................190
Creating New Anatomical Views..................................................................192
Uploading Modified APR Files .....................................................................193
Error Messages ...........................................................................................194
Interface Cable ............................................................................................195
RENEWAL PARTS ................................................................................................196
APX 525/625 Control, Power Module, and AEC Device ...................196
110-0028G2 High Frequency Transformer .......................................198
PERIODIC MAINTENANCE...................................................................................199
General Notes..............................................................................................199
Test Equipment Required .................................................................199

APX 525/625 Generators Revision C Table of Contents
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Inspection..........................................................................................199
Preventive Maintenance Log.............................................................201
Maintenance Equipment Upgrade / Modification Log........................202
INDEX ....................................................................................................................203

APX 525/625 Generator Revision C Introduction
© 2005 Del Medical Imaging Corporation 7/5/2005 Page 1
INTRODUCTION
This manual contains the necessary instructions for proper operation, installation,
adjustments and calibration of the APX 525 & 625 High Frequency Generator.
All persons operating or servicing this equipment need to have read this manual
beforehand. You must have a thorough understanding of the APX 525 or 625 and its
proper use before you make any radiographic exposures.
Damage in Transportation
All packages should be closely examined at time of delivery. If damage is apparent,
have notation of "Bad Order" placed by the delivery driver on all copies of the freight
or express bill. If damage is of a concealed nature, notify the transportation agent as
soon as possible to make an "Inspection report of damage" but in any event not later
than 15 days after delivery. A transportation company usually will not pay a claim for
concealed damage if an inspection is not requested within this 15 day period. The
company's responsibility ceases when the transportation company accepts the
shipment in good order, and the company assumes no liability for loss or damage
after delivery to the carrier.
Telephone numbers
Technical Support [phone]
Toll Free Te. 800-800-6006
Fax [phone]
Send all orders and correspondence to
DEL MEDICAL IMAGING CORPORATION
11550 W. King Street
Franklin Park, IL 60131
Copyright
DEL MEDICAL IMAGING CORP. 2005
All Rights Reserved
X-Ray Protection
X-ray equipment may cause injury if used improperly. The instructions contained in
this manual must be read and followed when operating the APX 525 or 625 High
Frequency Generator. Del Medical Imaging Corporation's authorized dealers will be
glad to assist in placing the APX 525 or 625 into operation.
The APX 525 and 625 provides a high degree of protection from unnecessary
radiation. However, no practical design can provide complete protection nor prevent
operators from exposing themselves or others to unnecessary radiation.

APX 525/625 Generator Revision C Introduction
© 2005 Del Medical Imaging Corporation 7/5/2005 Page 2
Personal radiation monitoring and protective devices are available. Operators are
urged to use them to protect against unnecessary radiation exposure.
It is important that Operators and their supervisors be fully acquainted with
applicable government radiation protection regulations. Many provisions of these
regulations are based on recommendations of the National Council on Radiation
Protection and Measurements. Recommendations for medical x-ray protection are
published in NCRP Report Number 102, and are available from:
NCRP Publications
7910 Woodmont Ave.
Suite 1016
Bethesda, MD 20814
Those responsible for the planning of x-ray and gamma-ray equipment installations
must be thoroughly familiar with and comply completely with NCRP Number 49,
"Structural Shielding Design and Evaluation for Medical Use of X-Rays and
Gamma-Rays of Energies up to 10 MEV", as revised or replaced in the future.
The Center for Devices and Radiological Health has discontinued the Radiological
Health Bulletin. However, this information can now be found on the Internet, through
the CDRH home page (http://www.fda.gov/cdrh/cdrhhome.html).
X-Ray Equipment Safety Recommendations
All movable assemblies and parts of this equipment must be operated with
reasonable care. The manufacturer's equipment recommendations as outlined in the
User and Installation/Maintenance Manuals accompanying the equipment must be
observed.
Routine inspection of these assemblies should be performed by qualified service
personnel on a semi-annual basis. Only properly trained service personnel should
be permitted access to internal assemblies, as live electrical components are
present. Be sure line disconnect switches are open or other appropriate safety
precautions are followed before service work is performed.
Failure to follow manufacturer's service personnel's recommendations may result in
serious injury or death to the operator and those in the immediate area.
Electrical Grounding
This equipment must be grounded to a separate earth ground. No other means is
acceptable. Refer to the National Electrical Code for grounding of Radiographic
equipment.
X-Ray Tube
The APX 525 and 625 is shipped with tube loading programs specifically designed
for the individual x-ray tubes which are approved for use. The programs are based
on focal spot size and anode heat dissipation of the tube insert that will be used with

APX 525/625 Generator Revision C Introduction
© 2005 Del Medical Imaging Corporation 7/5/2005 Page 3
the generator. Tube inserts of load capacities other than those for which the APX
525 or 625 was configured may be permanently damaged if used with the incorrect
tube loading program. Consult Del Medical Imaging Corporation for additional
information. A list of compatible tubes is on page 128.
Features and Benefits of the APX 525 and 625
The advanced APX family of generators utilizes the latest in multi-pulse high
frequency technology to produce waveforms near constant potential. The features
include:
•Menu driven, soft button approach makes the APX very easy to learn
and gives maximum user flexibility
•Microprocessor control improves ease of use, reliability and
serviceability
•Two point technique selection mode utilizes Isowatt tube current
control, which provides the maximum mA at the selected combination
of kV and mAs for the shortest possible exposure times
•Operator has the ability to exercise traditional three factor control of
kV, mA, and time, in three point operational mode
•30 kW output with APX 525 provides up to 500 mA and 40 kW output
with APX 625 provides up to 600 mA for motion stopping power
•Back lighted liquid crystal display is easy to read from almost any
angle or lighting condition
•Optional AEC mode
•Post reading mAs (in AEC mode) lets the technologist confirm
exposure and verify technique
•Built-in anode heat calculator automatically displays percentage of
heat units on anode
Power Levels
kW Rating 30 40
kV Range 40-125 40-125
mAs Range 1-500 1-600
Maximum mA 500 600

APX 525/625 Generator Revision C Introduction
© 2005 Del Medical Imaging Corporation 7/5/2005 Page 4
General features:
•Individual control of kV, mAs, mA and time with the availability of both
two and three point operating modes
•Liquid Crystal Display
•Closed loop kV stabilization
•Closed loop mA stabilization
•Automatic line voltage compensation
•Tube protection circuitry
•Space saving design for versatile installation
•Built-in anode heat calculator
•UL 187 Compliant
Power Requirements:
•APX 525 may be operated on a single or three phase power line
•APX 625 may be operated only on a three phase power line
(see pre-installation chapter of this manual for more details)
Options:
•Automatic exposure control

APX 525/625 Generator Revision C Operating Manual
© 2005 Del Medical Imaging Corporation 7/5/2005 Page 5
OPERATING MANUAL
Introduction
The Universal APX is a high frequency, microprocessor based x-ray generator,
which is designed for general radiographic applications. The operator’s control
features a unique menu driven, soft button interface that makes it extremely easy to
use.
Caution: If your machine is setup for password protection, write
down what your password is and store it in a safe place. If you forget
your password, you will have to send the control console back to the
factory to get it reprogrammed. The installation technician will tell
you if your machine has password protection or not.
The APX can be operated in the following modes:
•2 Point Mode: Operator controls kV and mAs of exposure. mA is
automatically calculated by software to produce highest allowable tube
current for shortest possible exposure, within limitations of the x-ray
tube.
2 Point Operator’s screen

APX 525/625 Generator Revision C Operating Manual
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•3 Point Mode: Gives operator free selection of exposure techniques,
including kV, mA, and Time. Additionally, the calculated mAs of the
exposure will be displayed in the center portion of the LCD screen.
Software will inhibit selection of techniques that are beyond the
limitations of the x-ray tube.
3 Point Operator’s screen
•AEC – Automatic Exposure Control. Lets the operator select kV,
Backup mAs, ion chamber fields, two film/screen combinations,
density, and image receptors.
AEC Mode Operator’s screen
•APR - Anatomically Programmable Radiography. The operator can select from
up to twelve anatomic regions, with up to twelve different views per region, for
a total of up to 96 different pre-programmed techniques, designed to optimize
exposures for typical patient studies.

APX 525/625 Generator Revision C Operating Manual
© 2005 Del Medical Imaging Corporation 7/5/2005 Page 7
Power On/Off Procedure
To Power Up The APX 525 or 625 Generator:
Turn the main power disconnect switch to ON
Turn the power switch of the APX 525 or 625 control to ON. This switch is
located on the left side of the operator control console
Within a few seconds, all control panel indicators will illuminate, and an audible tone
will sound during the Power-Up Self Test.
When this Self Test is completed, the display screen will default to the
predetermined mode of operation that was selected at the time of installation. The
system is now ready for use.
To Power Down the APX 525 or 625 Generator:
Turn the power switch on the operator console to OFF
If the generator will not be used for an extended period, set the main power
disconnect switch to OFF.
Operator Control Console
Power
Switch
Rotational
Knob
Display
Membrane Button
(
T
yp
ical
)
Expose
Button
Ready
Button

APX 525/625 Generator Revision C Operating Manual
© 2005 Del Medical Imaging Corporation 7/5/2005 Page 8
APX Control Console Description
The multi-function, membrane buttons and rotational knob are used either to make a
selection from the alternatives listed in the display, such as the optional AEC mode,
the APR Mode, or to select a technique parameter, such as to change the kV, time,
mA, or mAs.
There are two methods available to change technique parameters:
•For a numerical parameter with a range of values, such as kV, mAs,
time, or mA, you must first press the button adjacent to the parameter
you wish to change. The present value will be highlighted on the
screen. This value can now be changed by turning the rotational knob
clockwise to increment the value or counterclockwise, to decrement
the value.
•For other parameters, such as the selection of focal spots, film
receptors, AEC fields, density, two or three point operating modes,
APR Mode, and several other selections, pressing the multi-function
button repeatedly will toggle through the possible values.

APX 525/625 Generator Revision C Operating Manual
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Single Function Buttons
Button Description
kV
Pressing the button above this portion of the display will highlight
the current value. The kV may be changed in single digit
increments, using the rotational knob.
mAs
Pressing the button above this portion of the display will highlight
the current value. The mAs may be changed in pre-determined
steps, using the rotational knob. (2 point mode only)
mA
Pressing the button above this portion of the display will highlight
the current value. The mA may be changed between 25 mA to 500
mA (25 mA to 600 mA for 625), in 12 steps, using the rotational
knob. (3 point mode only)
Time
Pressing the button above this portion of the display will highlight
the current value. The exposure time may be changed in single
digit increments using the rotational knob. (3 point mode only)
Although values of time may be selected, the actual duration of the
exposure will always be controlled by the mAs timer circuitry. The
available Time selections (in seconds) are: .010, .012, .015, .020,
.025, .030, .035, .040, .050, .060, .070, .080, .09, 0.1, 0.12, 0.15,
0.25, 0.3, 0.35, 0.4, 0.5, 0.6, 0.75, 0.9, 1.0, 1.25, 1.5, 1.75, 2.0, 2.5,
3.0, 4.0, 5.0, and 6.0
Focal Spot
Pressing the button adjacent to this portion of the display will toggle
the current value between the large and small focal spot.
International symbols are used to depict the large and small focal
spots.
APR Pressing the button adjacent to this portion of the display will
activate the APR mode of operation.
Image
Receptor
Pressing the button adjacent to this portion of the display will toggle
the current value between the Table and Wall locations. Selection
of Buckys is indicated when the dark line is behind or below the
receptor surface. If the Bucky is not selected, the word "NONE" will
be shown. International symbols have been used to identify the
Table and Wall receptors.

APX 525/625 Generator Revision C Operating Manual
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Single Function Buttons
Button Description
2 Point /
3 Point
Pressing the button adjacent to this portion of the display will toggle
the current value between the 2 and 3 point technique modes. In 2
point mode, the operator selects only the kV and mAs of an
exposure. The mA is automatically calculated by the generator to
produce the shortest exposure possible for the selected technique,
while protecting the x-ray tube from overloads.
In the 3 point mode, the operator must select the kV, mA, and Time
of the exposure. The technique selections will be limited by the x-
ray tube overload circuit. Disallowed techniques require the
operator to manually readjust either the kV, mA, or Time of the
technique, in order to perform the exposure within the tube’s power
limit.
Display
Contrast
Pressing the button above this portion of the display will highlight
the current value. The contrast can then be adjusted with the
rotational knob.
AEC (optional)
Pressing the button adjacent to this portion of the display will
activate the AEC circuitry (if installed) and enable several button
selections that are used to control the backup mAs setting, ion
chamber selection, film density, and film/screen combinations.
Pressing the AEC button again will disable the AEC mode and
return the generator to manual exposure control. The operator must
select the backup mAs for any exposure.
PREP and
EXPOSE
To make an exposure press and hold down the <PREP> button.
When the green READY light above <PREP> displays, continue
holding down <PREP> while you press the <EXPOSE> button. The
red X-RAY light above <EXPOSE> will light up during the
exposure. When the lights go out the exposure has been taken and
you can release the two buttons.
MODE SELECTION
The APX generator operates in three basic modes:
•Manual (2 or 3 point techniques)
•APR mode (3 point techniques only)
•Optional Automatic Exposure Control (AEC) (2 or 3 point techniques)

APX 525/625 Generator Revision C Operating Manual
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Setting Default Startup Parameters
Default startup techniques may be programmed by the operator in the following
manner:
1. Depress and hold the button at the lower left corner of the display screen while
turning the generator ON. The default startup screen will appear as the
generator is in its power up sequence.
2. You may now select the default settings for the following parameters:
•Startup mode (2 or 3 point mode, APR, optional AEC)
•Default 2 point kV
•Default 2 point mAs
•Default 3 point kV
•Default 3 point mA
•Default 3 point Time
•Default focal spot
•Default image receptor (Wall, Table, or None)
•Default screen contrast
3. To exit this screen and save your changes, press <exit>. The generator will
now complete its power up sequence and default to your new settings.
Prep and Expose
To make an exposure:
1. Press and hold down the PREP button
When the green READY light turns on above the PREP button, continue
holding down the PREP button while you press the EXPOSE button.
When the exposure occurs, the red X-RAY light above the EXPOSE
button will be illuminated and an audible tone will sound for the duration of
the exposure.
Continue to hold down both buttons until the red x-ray light goes out and the
audible tone ends. Releasing either of the two buttons during an exposure
will cause the exposure to terminate and a BUTTON FAULT error
message to be displayed.
Using the Rotational Knob
The rotational knob used in conjunction with the kV, mAs, Time, and centimeter
thickness buttons. When one of those buttons is pressed, that parameter is
highlighted on the screen in reverse video. The values are changed with the
increment or decrement buttons.