2236420 & 2275938 Series) AMX4+ RATINGS AND SPECIFICATIONS_SM_2173221-100_8, AMX4+ RATINGS AND SPECIFICATIONS_SM_2173221-100_8 AMX−4+ Ratings and Specifications (Model 2169360

GE Healthcare

gehealthcare.com

Technical
Publications

Direction 2173221−100

Revision 8

AMX−4+ Ratings and Specifications
(Model 2169360, 2236420 & 2275938 Series)

Copyrighte 1996, 1997, 1999, 2000, 2003 and 2004 By General Electric Co.
All Rights Reserved

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IMPORTANT! . . . X-RAY PROTECTION

X-ray equipment if not properly used may cause injury. Accordingly, the instructions herein contained
should be thoroughly read and understood by everyone who will use the equipment before you attempt to
place this equipment in operation. The General Electric Company, Medical Systems Group, will be glad to
assist and cooperate in placing this equipment in use.

Although this apparatus incorporates a high degree of protection against x-radiation other than the useful beam, no
practical design of equipment can provide complete protection. Nor can any practical design compel the operator to
take adequate precautions to prevent the possibility of any persons carelessly exposing themselves or others to
radiation.

It is important that everyone having anything to do with x-radiation be properly trained and fully acquainted with the
recommendations of the National Council on Radiation Protection and Measurements as published in NCRP Reports
available from NCRP Publications, 7910 Woodmont Avenue, Room 1016, Bethesda, Maryland 20814, and of the
International Commission on Radiation Protection, and take adequate steps to protect against injury.

The equipment is sold with the understanding that the General Electric Company, Medical Systems Group, its agents,
and representatives have no responsibility for injury or damage which may result from improper use of the equipment.

Various protective material and devices are available. It is urged that such materials or devices be used.

CAUTION: United States Federal law restricts this device to use by or on the order of a physician.

CERTIFIED ELECTRICAL CONTRACTOR STATEMENT

All electrical installations that are preliminary to positioning of the equipment at the site prepared for the equipment shall be
performed by licensed electrical contractors. In addition, electrical feeds into the Power Distribution Unit shall be performed
by licensed electrical contractors. Other connections between pieces of electrical equipment, calibrations, and testing shall
be performed by qualified GE Medical personnel. The products involved (and the accompanying electrical installations) are
highly sophisticated, and special engineering competence is required. In performing all electrical work on these products,
GE will use its own specially trained field engineers. All of GE’s electrical work on these products will comply with the
requirements of the applicable electrical codes.

The purchaser of GE equipment shall only utilize qualified personnel (i.e., GE’s field engineers, personnel of third-party
service companies with equivalent training, or licensed electricians) to perform electrical servicing on the equipment.

DAMAGE IN TRANSPORTATION

All packages should be closely examined at time of delivery. If damage is apparent, have notation “Damage in
Shipment” written on all copies of the freight or express bill before delivery is accepted or “signed for” by a

General Electric representative or a hospital receiving agent. Whether noted or concealed, damage MUST be
reported to the carrier immediately upon discovery, or in any event, within 14 days after receipt, and the contents
and containers held for inspection by the carrier. A transportation company will not pay a claim for damage if an
inspection is not requested within this 14−day period.
To file a report:

− Call 1−800−548−3366 and use option 8.

− Fill out a report on http://egems.med.ge.com/edq/home.jsp

− Contact your local service coordinator for more information on this process

Rev. June 13, 2006

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TABLE OF CONTENTS

SECTION 1

INTRODUCTION 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-1 Identification and Compatibility 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-2 General 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-3 Inspection 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1-4 HHS Testing 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 2

SPECIFICATIONS 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-1 Accuracy Criteria 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2 Physical Characteristics 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2-1 Dimensions (All measures are nominal) 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-2-2 Environmental Limits 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3 Battery 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3-1 Specifications 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-3-2 Battery Capacity 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-4 Movements 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-5 Moving Efforts 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-6 Drive Speed 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-7 Tube Unit Ratings 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-8 Generator Operator Indicators 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-9 kVp Accuracy 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-9-1 Test Method 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-10 mAs Metering Accuracy 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-10-1 Test Method 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-11 Reproducibility 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-12 Beam Quality 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-12-1 Test Method 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-13 Collimator Function 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-14 Collimator Alignment and SID 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-15 Collimator Light Field Intensity 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-16 AEC Minimum Exposure Time

(Applies to units equipped with Mobil−AID) 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 3

HHS TEST CHECKLISTS 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-1 HHS Tests (Excluding AEC) 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-1-1 Generator Operator Indicators 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-1-2 Technique Accuracy kVp/mA 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-1-3 Indirect Linearity 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-1-4 Technique Accuracy − mAs 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-1-5 Reproducibility Of Exposures − Non−AEC 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-1-6 Beam Quality

(Half Value Layer) 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-1-7 Collimator Function 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-1-8 Collimator Alignment and SID 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-1-9 Collimator Light Field Intensity 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2 AEC HHS Tests

(Units with Mobil−AID) 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2-1 Reproducibility Of Exposures − AEC 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3-2-2 AEC Minimum Exposure Time 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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REVISION HISTORY

REV DATE REASON FOR CHANGE

A Oct. 30, 1996 Draft copy.
0 Dec. 13, 1996 Initial release.
1 Mar. 7, 1997 Changed Tube Column (Section 2−4) rotation to 270 degrees.
2 Aug. 14, 1997 High Impact Inspection.
3 Sept. 16, 1997 Added Keithly Non−Invasive Divider to kVp calibration and verification

(Section 2−9−1).
4 Apr. 12, 1999 Added AMX−4+ Model 2236420.
5 Nov. 8, 2000 Added AMX−4+ Model 2275938.
6 Nov. 20, 2003 Revised moving efforts in section 2−5.
7 Aug. 20, 2006 Added new collimator 46−270615P3 (Medys) reference in Section 2−13.
8 May 09, 2008 Updated Section 2−12 for CFR 1020.30/31/32 regulatory compliance.

Updated for international compliance.

Updated model numbers in Table 1−2.

Added model numbers to note in Table 1−2.

Added model numbers to Section 2−2−1, step 1.

Added model numbers to Section 2−3−1, step 2, 2nd bullet.

Added model numbers to Section 2−4, step 1a and 1c.

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SECTION 1
INTRODUCTION

1-1 Identification and Compatibility

See Illustration 1−1. The AMX−4+ is identified by Model Number on the rating plate located on the top
cover. Model part and catalog numbers are identified in Table 1−1.

TABLE 1−1

AMX−4+ MODELS

Description Part Number

Domestic 2169360−7 A0659F 2236420−7 & 2275938−7 A0659JF

Domestic, AEC 2169360−8 A0659FA 2236420−8 & 2275938−8 A0659JG

Domestic, Tech Switch 2169360−9 A0659FC 2236420−9 & 2275938−9 A0659JH

Domestic, AEC, Tech Switch 2169360−10 A0659FB 2236420−10 & 2275938−10 A0659JJ

IEC, EMC 2169360 A0659A 2236420 & 2275938 A0659J

IEC, EMC, AEC 2169360−2 A0659AA 2236420−2 & 2275938−2 A0659JA

IEC, EMC, Tech Switch 2169360−3 A0659AB 2236420−3 & 2275938−3 A0659JB

IEC, EMC, AEC, Tech Switch 2169360−4 A0659AC 2236420−4 & 2275938−4 A0659JC

Japan 2169360−5 A0659C 2236420−5 & 2275938−5 A0659JD

Japan Short Column 2169360−6 A0659D 2236420−6 & 2275938−6 A0659JE

240V Short Column 2275938−12 A0659JM

240V Short Column, AEC 2275938−13 A0659JN

240V Short Column, Tech Switch 2275938−14 A0659JP

240V Short Column, AEC, Tech Switch 2275938−15 A0659JR

IEC, Tech Switch − Chinese 2275938−16 A0659JS

IEC, AEC, Tech Switch − Chinese 2275938−17 A0659JW

Catalog
Number

Part Number

Catalog
Number

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ILLUSTRATION 1−1

AMX−4+ IDENTIFICATION

RATING

PLATE

The applicable components making up the AMX−4+ are identified with the nameplate statement, “this
product conforms to all applicable standards under 21 CFR part 1020,” or “complies with radiation
performance standards, 21 CFR sub- chapter J.”

TABLE 1−2

AMX−4+ COMPONENTS

Component Model No. Nameplate Location

HV Transformer 46−270954G2 Duplicate plate on front of top cover above circuit

breaker

HRT X−ray Tube Housing 46−155750G8 Rear trim cover

Maxiray 75 TH 111 X−ray
Tube Housing

Collimator 46−270615P3 Right side of Collimator

Mobil−AID D1300 Automatic
Exposure Control*

*Note: Mobil−AID is present only on AMX−4+ Models 2169360−2, −4, −8, −10, 2236420−2, −4, −8, −10 and 2275938−2,

−4, −8, −10, −13, −15, −17.

2222709 Rear trim cover

46−279732P4 (A8413BA) Duplicate plate on front of top cover above AEC

paddle

1-2 General

The AMX−4+ contains operating safeguards to provide maximum safety. Before calling for service, be
certain proper operating procedures are being used. Refer to Direction 2166913−1EN, AMX−4+
Operation for proper operating procedures.

Satisfactory equipment performance requires the use of service personnel specially trained on X−ray
apparatus. GE Healthcare is responsible for the effects on safety, reliability, and performance only if the
following conditions are met:

− The electrical wiring of the relevant rooms complies with all national and local codes.

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− All assembly operations, extensions, re-adjustments, modifications, or repairs are carried out by GE

Healthcare, authorized service representatives.

− The equipment is used in accordance with the instructions for use. Refer to Direction

2166913−1EN, AMX−4+ Operating Manual for proper operating procedures.

AMX−4+ contains high voltage circuits for generating X−rays. Only trained
and qualified personnel should be permitted access to the internal parts
of this equipment.

1-3 Inspection

In order to assure continued performance of this X−ray equipment, a Periodic Maintenance program must
be established in accordance with 2173227−100 AMX−4+ Periodic Maintenance. It is the owner’s
responsibility to supply or arrange for this service.

1-4 HHS Testing

The United States Department of Health and Human Services (HHS) has established performance
requirements for diagnostic X−ray equipment. These requirements are defined in Title 21 of the Code of
Federal Regulations, and apply only to certain specified components identified as “certified equipment.”

The manufacturer of specified diagnostic X−ray components must certify that the components:

1. Perform as required by the HHS standard when installed, adjusted, and tested as specified in the
manufacturer’s instructions to the assembler.

Refer to Direction 2173222−100 AMX−4+ Installation for HHS compliance testing as it pertains to the
AMX−4+ during installation.

2. Will continue to comply when maintained in accordance with the manufacturer’s instructions.

Refer to Direction 2173227−100 AMX−4+ Periodic Maintenance for periodic HHS compliance testing
for the AMX−4+.

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SECTION 2
SPECIFICATIONS

2-1 Accuracy Criteria

Specified accuracies are subject to additional errors for accuracy of instrumentation used during
calibration and measurement. To achieve generator accuracies, the following criteria must be met:

− The WAIT message must not appear on the Message Display when taking an exposure.

− The READY FOR EXPOSURE message must appear on the Message Display.

General Electric Healthcare reserves the right to change specifications at any time without incurring any
obligation to incorporate new features in products previously sold.

2-2 Physical Characteristics

2-2-1 Dimensions (All measures are nominal)

1. Height: 70 inches (1778 mm) for Models 2169360−6, 2236420−6, and 2275938−6, −12, −13, −14,

−15; all others 76 inches (1930 mm).

2. Width: 25−3/16 inches (640 mm)

3. Length: 45−3/8 inches (1153 mm)

4. Weight: 1080 pounds (490 kg)

2-2-2 Environmental Limits

1. Operating temperature range: 59 to 100 Degrees Fahrenheit (15 to 38 Degrees Celsius) at 80%
non−condensing humidity.

2. Storage temperature range −40 to +140 Degrees Fahrenheit (−40 to +60 Degrees Celsius)

3. Maximum operating altitude: 8,000 feet (2440 meters).

2-3 Battery

2-3-1 Specifications

1. Nine 12.9 volt batteries connected in series provide approximately 116 volts at full charge.

2. Battery charger requires the following:

> For Models 2169360−7, 2169360−8, 2169360−9, 2169360−10, 2236420−7 & 2275938−7,

2236420−8 & 2275938−8, 2236420−9 & 2275938−9, 2236420−10 & 2275938−10: 120 Volts AC,
60 Hz at 6 A.

> For Models 2169360, 2169360−2, 2169360−3, 2169360−4, 2236420 & 2275938, 2236420−2 &

2275938−2, 2236420−3 & 2275938−3, 2236420−4 & 2275938−4 and 2275938−12, −13, −14,

−15, −16, −17: 220/240 Volts AC, 50 Hz at 3.15 A.

> For Models 2169360−5, 2169360−6, 2236420−5 & 2275938−5, 2236420−6 & 2275938−6:

100 Volts AC, 50/60 Hz at 6 A.

Voltage must be maintained to +/−10% of the nominal value during charging.

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2-3-2 Battery Capacity

The AMX−4+ battery capacity can be measured by one of the following five methods. All capacities are
measured after the AMX−4+ has been charged to the “CHARGE COMPLETE” state. Available capacity
as stated applies only to new battery sets free of defective cells. Capacity may decrease as the battery
nears the end of its useful life.

method 1: exams

The AMX−4+ batteries will provide capacity for more than 20 typical EXAMs. An “EXAM” is defined as:

− Two 70 kVp, 10 mAs X−ray exposures including:

> 7 seconds of prep (rotor and filament drive)

> 25 seconds of field light

− 5 minutes of drive time

− 9 minutes of idle time

The formula in the “VARIED USAGE” section can be used to determine the number of total EXAMs
available for usage regimes different from this typical case.

method 2: X−ray Exposures

The AMX−4+ batteries will provide enough capacity for 165 or more 100 kVp, 100 mAs X−ray exposures.
Each exposure includes 4 seconds of prep (rotor and filament drive) time and 30 seconds of idle time for
battery recovery. This number may be reduced by additional idle time required for X−ray tube cooling.

method 3: drive time

The AMX−4+ batteries will provide enough capacity for 140 minutes of continuous drive time. This time
is typically independent of driving conditions, however, it may be reduced if a significant portion of the
drive is on carpeting or up ramps.

method 4: idle time

The AMX−4+ batteries will provide capacity for 23.3 hours of continuous idle time. “Idle” is the time when
the AMX−4+ is ON but not being used.

method 5: Varied usage

For varied usage, the AMX−4+ batteries will provide capacity according to the following formula:

{ (idle time in minutes )  3} +
{ (drive time in minutes )  30} +
{ ( field light time in minutes )  25 } +
{ ( prep time in minutes )  30} +
{ ( exposure energy* )  2.17} = 4200

*exposure energy = cumulative { ( kVp  mAs )  1000 }

EXAMPLE: Assume one desires to estimate the number exams available from an AMX−4+ used in a
particular pediatric ward. It is determined that a typical exam for this case is comprised of:

− Two 70 kVp, 0.8 mAs X−ray exposures including:

> 3 seconds of prep

> 15 seconds of field light

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− 1 minute of drive

− 5 minutes of idle

Using the above formula we can estimate the number of exams as follows:

each EXAM uses { (5 idle minutes )  3} +

{ (1 drive minutes )  30} +
2 x [ { (15  60 field light minutes )  25} +
{ (3  60 prep minutes )  30} +
{ ( (70 kVp  0.8 mAs )  1000 )  2.17} ] = 60.7

therefore the total number of typical EXAMs available is:

4200  60.7 = 69

2-4 Movements

1. Tube vertical movement measured at the focal spot (arm extended):

a. Range at least 46.5 inches (1181 mm) for Models

2169360−6, 2236420−6 and 2275938−6, −12, −13, −14, −15;
all others at least 52.5 inches (1334 mm).

b. Lowest position 26.1 inches (663 mm) max. from floor.

c. Highest position 72.6 inches (1844 mm) min. from floor for Models

2169360−6, 2236420−6 and 2275938−6, −12, −13, −14, −15;
all others 78.6 inches (1996 mm) min. from floor.

2. The horizontal movement measured at the focal spot relative to column face is 24 inches (610 mm)
minimum, to 40 inches (1016 mm) maximum.

3. Tube Column rotation measured from horizontal arm latch is +/−270 degrees.

4. Tube and yoke rotation around Horizontal Arm measured from tube port down position:

a. Range 360 degrees;

b. Detent locations0, +/−90, and +/−180 degrees.

5. Tube Trunnion rotation measured from tube port down position:

a. Range 120 degrees;

b. Forward 110 degrees;

c. Backward 10 degrees;

d. Detent 0 degrees, and 90 degrees.

6. Collimator Rotation measured from the front of the collimator with the tube port facing down:

a. Range 180 degrees;

b. Right 90 degrees;

c. Left 90 degrees;

d. Detent 0 and 90 degrees.

6

AMX−4+ RATINGS & SPECIFICATIONS

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 8 DIRECTION 2173221−100

2-5 Moving Efforts

1. Moving efforts with locks mechanically off (that is, energized electrically):

a. Vertical tube motion: 12 pounds (53 Newtons) maximum, measured going up or down; 15 pounds

(67 Newtons), measured over last 4 inches (102 mm) of travel.

b. Horizontal tube motion: 14 pounds (62.3 Newtons) maximum, measured going in or out.

c. Tube Column rotation: 15 pound−feet (20.3 Newton−meters) maximum.

d. Tube and yoke angulation around horizontal Arm: 10 to 20 pound−feet (14 to 27 Newton−meters)

to disengage from detent, 6 to 18 pound−feet (8 to 24 Newton−meters) to rotate between detents.

e. Tube rotation in yoke: 7 to 30 pound−feet (9.5 to 41 Newton−meters) to disengage from detent, 4

to 20 pound−feet (5 to 27 Newton−meters) to rotate between detents.

2. Moving efforts with locks mechanically on (that is, not energized electrically):

a. Vertical tube motion: 15 pounds (67 Newtons) minimum, 32 pounds (142 Newtons) maximum;

measured going up or down.

b. Horizontal tube motion: 10 pounds (44.5 Newtons) minimum, 28 pounds (125 Newtons) maximum;

measured going in or out.

c. Tube Column rotation: 25 to 40 pound−feet (34 to 54 Newton−meters).

2-6 Drive Speed

There are two speeds: Drive Speed with the horizontal Tube Arm secured for transport, and Maneuvering
Speed with the horizontal Tube Arm removed from the Transport Latch.

Drive speed is measured on a smooth, hard and level surface. Speed will be reduced by inclines,
carpeted or soft surfaces.

1. Drive Speed is 264 feet (6705 mm) per minute +/− 25%;

2. Maneuvering Speed is 30% to 60% of drive speed.

2-7 Tube Unit Ratings

Tube Housing and Insert Specifications are given in Direction 46−017226, Tube Ratings, HRT 50 and 60
Hz., or in 2236721−100, Product Data Sheet Maxiray 75 TH 11 X−ray Tube. Also, refer to note on
maximum allowable kVp and mAs ratings in 2166913−1EN AMX−4+ Operating Manual.

2-8 Generator Operator Indicators

Check for proper operation of tones or buzzers and labels as required by regulations. Reference
“Generator Operator Indicators” in Tab 3 of Direction 46−013894, System Field Test for HHS.

1. X−ray on indicator lights during an exposure.

2. Audible tone occurs during exposure.

3. Audible tone occurs with safety timed termination of AEC exposures.

4. Safety timed termination of AEC exposures requires resetting before taking another exposure.

5. X−ray warning label is legible.

7

AMX−4+ RATINGS & SPECIFICATIONS

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 8 DIRECTION 2173221−100

2-9 kVp Accuracy

1. Rise time of the kVp wave form from 10% to 90% of the maximum kVp is 1.2 millisecond or less.

2. Fall time of the kVp wave form from 90% of the maximum kV to 20 kV is 2.5 milliseconds or less.

3. Accuracy of the kVp wave form to selected kVp is +/− 8% of the value displayed on the operator
panel for the first 20 ms and +/− 5% after 20 ms. Accuracy applies within the range of the bar graph
battery charge indicator.

Note: These specifications do not apply to switching transients which occur during the first millisecond and

the last millisecond of an exposure.

2-9-1 Test Method

Preferred

Use a Keithley Non−Invasive kVp Divider (Model 35080A with Deviation 535 or Model 35080B, both using
Mobile Filter Pack Plus 37946C and optional Low Range Filter Pack 38237C). A Triad 35050A Dosimeter
can also be used to provide digital readout of corrected kVp values. No other substitutions for

non−invasive kVp Dividers are approved!

The set−up procedure and linear correction curves (non−Triad systems) for using the Keithley divider are
covered in Section 3 of Direction 46−017561 HHS Control and Tube Assembly Tests and Keithley’s
Operation and Maintenance manuals.

Alternate

Use the GE C1515A Invasive Bleeder. If this method is used, the unit should be calibrated and verified
with this meter.

Note: If an attempt is made to verify a unit calibrated with a C1515A bleeder with either of the above Keithley

Non−Invasive dividers, kVp readings will read 5−7 kVp higher than when read with the C1515A. This
is due to impedance changes in the high voltage circuit with the bleeder removed from the circuit and
due to frequency compensation errors present using the C1515A divider with the AMX−4+ waveform.

The procedure for connecting the C1515A High Voltage divider is covered in Direction 46−013288
Bleeder, High−Voltage Dual Type T8005G and C1515A Connection ... Applications, and Direction
2196272−100, High Voltage Cable Installation and Troubleshooting Procedures.

Make exposures and calculations as described in “Technique Accuracy − kV/mA” in Tab 3 of Direction
46−013894 System Field Test for HHS.

2-10 mAs Metering Accuracy

Accuracy of mAs is the integral of X−ray tube emission current between the time at which the kV wave
form reaches 75% of the indicated peak value at the beginning of an exposure and the time at which it
falls to 75% of the indicated peak value when the exposure is terminated.

Actual mAs shall match selected mAs within +/−10%.

8

AMX−4+ RATINGS & SPECIFICATIONS

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 8 DIRECTION 2173221−100

2-10-1 Test Method

This is an indirect procedure which verifies accuracy of the mAs metering circuitry and mAs calibration.
Measuring mAs Metering Accuracy is done by injecting 100 mA into the mAs integrating circuit and
comparing the response with a meter installed in the circuit. Reference Direction 2173223−100, AMX−4+
Calibration − familiarity with this direction is assumed. Also reference “Technique Accuracy − mAs” in Tab
3 of Direction 46−013894, System Field Test for HHS.

1. Enter mAs calibration and install meter.

2. At the prompt ENTER VALUE compare meter reading with displayed reading.

3. Correct reading to include meter accuracy before comparing with requirements.

Note: Accuracy of mA reading at the approximate 100 mA test condition is  0.1 mA. Meter accuracy must

be added to the mA reading before making judgment on the final reading.

2-11 Reproducibility

The coefficient of variation for radiation output is less than 0.045 for successive exposures having
constant technique factors.

Coefficient of variation is measured and calculated as described in “Reproducibility of Exposure” in Tab 3
of Direction 46−013894, System Field Test for HHS. This applies to all units for non−AEC mode −
reference the procedure “for exposures made without the use of A.E.C.” For units equipped with
Mobil−AID, also reference the procedure “for exposures made with an A.E.C.”

2-12 Beam Quality

The half−value layer of the useful beam at 80 kVp shall not be less than 2.5 millimeters of aluminum. This
requirement differs slightly from and supersedes NCRP 33. The specific test point is at 80 kVp requiring a
half value layer of 2.5 millimeters of aluminum. This applies to systems manufactured before June 10th,

2006.

For systems manufactured on or after June 10th, 2006 the following new regulation applies; The
half−value layer of the useful beam at 80 kVp shall not be less than 2.9 millimeters of aluminum. The
specific test point is at 80 kVp requiring a half value layer of 2.9 millimeters of aluminum.

Reference the System Rating Plate to determine manufactured date. Note: The rating plate shows month
and year only. For systems manufactured during June, 2006 you must verify the manufactured date in the
GE GIB database. Contact your local Service Representative for assistance.

2-12-1 Test Method

The procedure for measuring Beam Quality is presented in “Beam Quality (Half Value Layer)” in Tab 4 of
Direction 46−013894 System Field Test for HHS. The following noted exceptions to that procedure apply
for the AMX−4+:

1. Select initial technique factors of 80 kVp and 20 to 48 mAs.

2. When making an exposure without the absorber, adjust mAs so that the radiation meter reading
contains three significant digits.

3. Use an AMX−4 absorber 46−173632G2 in the collimator rails.

9

AMX−4+ RATINGS & SPECIFICATIONS

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 8 DIRECTION 2173221−100

> For systems manufactured On or After June 10th, 2006 add additional aluminum filtration from

the HVL Attenuator set part # 46−194427P274 found in the HHS Kit part # 46−303879G1 or
46−303879G2. Total test filtration = 3.1 mm of Aluminum. Affix these plates to the AMX−4
absorber with tape. Ensure the tape is not in the usable beam path.

> For tube changes there is an additional 1.2 mm Aluminum cup added to the X−Ray Tube. This

cup snaps onto the collimator mounting plate and is easily identified since the tube glass port is
not visible. This cup must be present and retained for systems manufactured On or After June
10th, 2006. Likewise this cup if provided with the replacement tube it must be removed for
systems manufactured before June 10th, 2006. Reference the system rating plate affixed to the
AMX unit.

2-13 Collimator Function

A manual collimator, model 46−270615P2 (Micro Medical Systems) or model 46−270615P3 (Medys),
bearing an HHS certification label is installed on the AMX−4+. Reference “Functional Test − Manual Rad
Collimator Version” in Tab 6 of Direction 46−013894, System Field Test for HHS.

1. Minimum source to skin distance is limited to more than 30 centimeters by the skin spacers at the
beam exit of the collimator.

2. Full 17 by 17 inch (43 by 43 centimeters) radiographic coverage at 40 inch (1.02 meter) Source to
Image Distance.

3. Minimum inherent filtration of 2.0 mm aluminum equivalent at 100 kVp.

2-14 Collimator Alignment and SID

Collimator Alignment and SID tests are performed in accordance with Tab 6 of Direction 46−013894,
System Field Test for HHS, reference:

SID Test
Light to X−ray Field Test
Center to Center Test
Field Indicator (Pointers to Actual Size)

1. The X−ray field size must agree with the indicated field size within 1.8% of SID.

2. Total misalignment of parallel edges of the light field with the edges of its X−ray field must not
exceed 1.7% of SID.

3. The difference between the indicated SID and the actual SID must not exceed 1.8% of the indicated
SID.

2-15 Collimator Light Field Intensity

The average illumination at a distance of 100 cm (39.37 inch) from the focal spot shall be 16 foot candles
(170 lux) or more. Reference “Collimator Light Field Intensity” in Tab 6 of Direction 46−013894, System

Field Test for HHS.

10

AMX−4+ RATINGS & SPECIFICATIONS

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 8 DIRECTION 2173221−100

2-16 AEC Minimum Exposure Time

(Applies to units equipped with Mobil−AID)

When the X−ray kVp is equal to or greater than 50 kVp, the minimum exposure time will be equal to or
greater than the time interval required to deliver 5 mAs. Reference “AEC Minimum Exposure Time” in Tab
3 of Direction 46−013894, System Field Test for HHS.

11

AMX−4+ RATINGS & SPECIFICATIONS

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 8 DIRECTION 2173221−100

SECTION 3
HHS TEST CHECKLISTS

The importance of HHS compliance testing cannot be over emphasized. Before starting these
procedures, review Direction 46−013894 System Field Test for HHS. Pay particular attention to
“Introduction” (Tab 1 of Direction 46−013894).

With the exception of Collimator Function and Beam Quality, all field tests for HHS compliance are to be
performed at specified intervals.

3-1 HHS Tests (Excluding AEC)

Requirements are pass or fail. Service is required if any Requirement is failed. After each Requirement is
verified, place a check in its box. Record notes and comments next to the Requirement.

Inspect Requirement Inspector’s Notes

3-1-1 Generator Operator

Indicators

Required during Installation,
preventative maintenance
calls, or when replacing
major components.

3-1-2 Technique

Accuracy kVp/mA

Required during Installation,
preventative maintenance calls,
and repair.

3-1-3 Indirect Linearity

Required during Installation,
preventative maintenance
calls, and repair.

3-1-4 Technique

Accuracy − mAs

Required during Installation,
preventative maintenance
calls, and repair.

[ ] Check for proper operation of tones and

buzzers as required by regulations. Refer
to “Generator Operator Indicators” in
Section 2 of Direction 2173221−100,
AMX−4+ Ratings And Specifications, and
perform defined inspection.

[ ] Actual kVp matches select kVp. Refer to

“kV Accuracy” in Section 2 of Direction
2173221−100, AMX−4+ Ratings &
Specifications, and perform procedure.

[ ] Refer to “Indirect Linearity” in Tab 3 of

Direction 46−013894, System Field Test for HHS.

[ ] Refer to “mAs Metering Accuracy” in

Section 2 of Direction 2173221−100,
AMX−4+ Ratings & Specifications, and
perform defined procedure.

3-1-5 Reproducibility Of

Exposures −
Non−AEC

Required during Installation,
preventative maintenance
calls, and repair.

[ ] Refer to “Reproducibility” in Section 2 of

Direction 2173221−100, AMX−4+ Ratings &
Specifications, and perform defined
procedure for non−AEC mode exposures.

12

AMX−4+ RATINGS & SPECIFICATIONS

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 8 DIRECTION 2173221−100

Inspect Inspector’s NotesRequirement

3-1-6 Beam Quality

(Half Value Layer)

Required during Installation,
or after replacement of tube
unit, collimator, or other
absorption between source
and patient.

3-1-7 Collimator

Function

Required during Installation,
or after replacement of
collimator.

3-1-8 Collimator

Alignment and SID

Required during Installation,
preventative maintenance
calls, and repair.

3-1-9 Collimator Light

Field Intensity

Required during Installation,
preventative maintenance
calls, and repair.

[ ] Refer to “Beam Quality” in Section 2 of

Direction 2173221−100, AMX−4+ Ratings &
Specifications, and perform defined
procedure.

[ ] Refer to “Collimator Function” in Section 2

of Direction 2173221−100, AMX−4+
Ratings & Specifications, and perform
defined checks.

[ ] Refer to “Collimator Alignment and SID” in

Section 2 of Direction 2173221−100,
AMX−4+ Ratings & Specifications, and
perform defined procedures.

[ ] Refer to “Collimator Light Field Intensity” in

Section 2 of Direction 2173221−100,
AMX−4+ Ratings & Specifications, and
perform defined procedure.

3-2 AEC HHS Tests

(Units with Mobil−AID)

Requirements are pass or fail. Service is required if any Requirement is failed. After each Requirement is
verified, place a check in its box. Record notes and comments next to the Requirement.

Inspect Requirement Inspector’s Notes

3-2-1 Reproducibility Of

Exposures − AEC

Required during Installation,
preventative maintenance
calls, and repair.

3-2-2 AEC Minimum

Exposure Time

Required during Installation,
preventative maintenance
calls, and repair.

[ ] Refer to “Reproducibility” in Section 2 of

Direction 2173221−100, AMX−4+ Ratings &
Specifications, and perform defined
procedure for AEC mode exposures.

[ ] Refer to “AEC Minimum Exposure Time” in

Section 2 of Direction 2173221−100,
AMX−4+ Ratings & Specifications, and
perform defined procedure.

13

AMX−4+ RATINGS & SPECIFICATIONS

GE HEALTHCARE (MODEL 2169360, 2236420 & 2275938 SERIES)

REV 8 DIRECTION 2173221−100

THIS PAGE INTENTIONALLY LEFT BLANK.

14

GE Healthcare

GE Healthcare: Telex 3797371
P.O. Box 414, Milwaukee, Wisconsin 53201 U.S.A.
(Asia, Pacific, Latin America, North America)

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283, rue de la Miniére, B.P. 34, 78533 Buc Cedex
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