lwx-50p operation manual

8/9/2019 LWX-50P Operation Manual

1/47

i

Safety classification of the equipment

Protection against electric-shock:

Class I Equipment- type B application

Extent of protection against harmful water: General equipment

Degree of Safety in the presence of Flammable Anesthetics Mixture with air or

with oxygen or with nitrous oxide: Not suitable for use in the presence of

Flammable Anesthetics Mixture with air or with oxygen or with nitrous oxide.

Working system: continuous operation with intermittent load

Safety symbols

Symbol Description

Al ternat ing current.

AC power.

Dangerous voltage.

Ionizing radiation.

Type B equipment.

Ground.

Large focus.

Small focus.

Atten tion , consul t accompanying documents.

X-ray radiate.

Power On.

Power Off.


2/47

ii

Emergency Switch.

This symbol indicates that the waste of electrical

and electronic equipment must not be disposed as

unsorted municipal waste and must be collected

separately. Please contact an authorized

representative of the manufacturer or an authorized

waste management company for information

concerning the decommissioning of your equipment.

Advisory messages

In this manual, the following safety symbols are always used. Prior to the operation of this

equipment, users should be familiar with these symbols and their meaning.

Danger: Indicates an imminently hazardous situation which, if not avoided, will

result death or serious injury. This signal word is to be limited to the most

extreme situations.

Warning : Indicates a potentially hazardous situation wh ich, if not avoided,

could result death or serious injury.

Caution: Indicates a potentially hazardous situation which, if not avoided, may

result inminor o r moderate injury. It may also be used to alert against unsafe

practices.

Note: Indicates info rmation or a company pol icy that relates directly or

indirectly to thesafety of personnel or protection of property. This signal word

is associated directly with ahazard or hazardous situation.

Responsibi lity of the manufactory

The manufactory has responsibility to the safety, reliability and capability of the equipment

at these conditions as follow:


3/47

iii

1. The equipments installation, calibration, operation and maintenance perform by trained

service personnel.

2. Electricfacilities in the correlative room are conformed to national standards.

3. Operation of the equipment has according to the manual.


4/47

iv

Please contact your supplier of the manufacturer for repairs and maintenance if there is

any trouble of machine.

Manufacturer: Shenzhen Landwind Industry Co.,Ltd.

Address: 4F,Block E, Bijing Bldg.81, jingtian Road, Futian District, Shenzhen China

Call center: 400-700-3788


5/47

1

Contents

Safety classification of the equipment ......................................................................... i

Safety symbols ............................................................................................................ i

Advisory messages ..................................................................................................... ii

Responsibility of the manufactory ............................................................................... ii

Chapter I General ............................................................................................................. 1

1.1 Product component structure ............................................................................... 1

1.1.1 Radiography table control system .............................................................. 1

1.1.2 High-Frequency and High-Voltage mainframe system ............................... 1

1.2 Characteristics ..................................................................................................... 2

1.3 Scope of application and contraindication ............................................................ 2

1.4 Working environment and conditions ................................................................... 2

Chapter II Safety ................................................................................................................ 3

2.1 General ................................................................................................................ 3

2.2 Operation safety ................................................................................................... 3

2.3 Responsibilities .................................................................................................... 5

2.4 EMC ..................................................................................................................... 5

2.5 Radiation protection ............................................................................................. 6

2.5.1 X-ray protection.......................................................................................... 6

2.5.2 Radiation protection standard .................................................................... 9

2.5.3 Detection of personal dose ...................................................................... 10

2.6 Fire safety ...........................................................................................................11


6/47

2

2.7 Electrical safety ...................................................................................................11

2.8 Mechanical safety .............................................................................................. 13

2.9 Disposal ............................................................................................................. 13

2.10 Designated significant zones of occupancy ..................................................... 14

Chapter III General and motion controls ......................................................................... 15

3.1 Functions of keys on Control Panel ................................................................... 16

3.2 Radiography table operation .............................................................................. 17

3.3 Footswitch .......................................................................................................... 18

3.4 Generator control console .................................................................................. 18

3.5 Collimator controls ............................................................................................. 18

3.6 Bucky photography ............................................................................................ 19

Chapter IV Control console ............................................................................................. 20

4.1 Console operation .............................................................................................. 20

4.1.1 Names of console keys ............................................................................ 20

4.1.2 Console key actions ................................................................................. 21

4.2 Start-up procedure ............................................................................................. 27

4.3 Common radiography operations ....................................................................... 28

4.3.1 Typical radiography order ........................................................................ 28

4.3.2 Customize the shortcut technology .......................................................... 28

4.3.3 Taking radiography with shortcut technology ........................................... 29

4.4 Error codes ........................................................................................................ 31

Chapter V Maintenance of equipment ............................................................................. 34


7/47

3

5.1 Surface cleaning ................................................................................................ 34

5.2 Routine check and maintenance ........................................................................ 34

Chapter Technical description ..................................................................................... 36

6.1 Radiation protection requirement ....................................................................... 36

6.2 Main properties and technical parameters ........................................................ 37

Attached figure ................................................................................................................ 39


8/47


9/47

Medical X-Ray Radiography System

Operation

1

Chapter I General

1.1 Product component structure

This medical X-ray Radiography System is mainly composed of high-frequency high

voltage host system, X-ray source components, high-pressure connectors, and

radiography table.

Mechanical parts of this equipment are composed of Column and Radiography table.

Integrated design of column and bed body is used in this Equipment, where the bed body

is fixed to the ground via screws, and the column is fixed onto the bed body via screws,

with horizontal and longitudinal movement of column along guide rails by using gearbearings. X-ray tube components and Collimator are vertically mounted on horizontal

shaft of the column right above the bed body, capable for vertical movement and rotation;

film box is mounted below bed panel, capable for horizontal and longitudinal movement

along guide rails.

Mainframe system consists of high-voltage generator, control console, and X-ray tube.

1.1.1 Radiography table control system

Radiography table control system controls the longitudinal movement of the column,

vertical movement of X-ray source movement, as well as the components radiography

table horizontal movement by the circuit composed of power supply components,

integrated control panel, control panel, as well as sensors, electromagnet brake

components, etc.

1.1.2 High-Frequency and High-Voltage mainf rame system

The system contains high-voltage generator, control console and mainly provide X-ray

tube with working voltage.

1. Console

Equipped with touchless membrane key and key tone, the console is connected with

generator and other X-ray system.

2. Mainframe

Including high pressure oil tank, HF inverter, medium speed anode rotation controller

(standard configuration), real-time controller and adaptor.


10/47


Operation

2

1.2 Characteristics

The equipment has the following characteristics:

Integration of column and bed;

Digital tube display of source-film distance and tube rotation parameters.

Use of microcomputer control technology.

Using the LCD display, and has APR operation functions.

After startup, before operation, electromagnets attract and lock up components,

which will be suspending and movable when power is on.

The main technical requirements are equivalent to international standards.

1.3 Scope of application and contraindication

Medical X-ray Radiography System is applicable for medical units to make

general-purpose X-ray photography of head, abdomen, chest and limbs skeleton in

upright position or lying position.

Contraindication: pregnant women are forbidden to use this equipment for physical

examination.

1.4 Working environment and condi tions

run Transportation and storage

Ambient temperature 10 - 30 -20 - 45

Relative humidity 45% - 75%, non-condensing 10% - 80%, non-condensing

Atmospheric pressure 860hPa - 1060hPa 700hPa - 1060hPa


11/47


Operation

3

Chapter II Safety

2.1 General

1. Be careful in operating X-ray tube components to avoid collision. Training must be

arranged when the machine is long-term unused or new tubes are to be replaced.

Please note to use the X-ray tube components according to their permitted heat

capacities, casing temperature shall not be exceeding 70.

2. In order to minimize absorbed dose of patients, operators are required to maximize

the distance between the focus used and the skin.

3. In order to avoid excessive attenuation of X-ray beam caused by materials inserted

between the patient and the X-ray film, bed panel is made of high-density laminates,

where the largest attenuation equivalent is 0.9mmAl.

4. In the following conditions, the manufacturer is responsible for the product security,

reliability and performance impact:

Assembly, additional building, commissioning, alteration and maintenance

carried out by authorized personnel;

Electric facilities indoors are compliant with relevant provisions;

Equipments are used according to instructed requirements.

2.2 Operation safety

WarningFor a continues and safety use of the system, please keep this

Operation Manual with the equipment at all times and periodically review the

Operating and Safety instructions.

Warning: Electric shock Dangers! Do not remove the chassis or panel.Console

and the generator mainframe have high-vol tage circuits which used for

generation and control of X ray, the voltage produced by these circuits could

be fatal.The operator should retain on the device chassis or panel to prevent

possible electric shock. The generator mainframe has no components or

regulator which that operator can be repaired, Only personnel whom have


12/47


Operation

4

trained and qualified can access the device's internal components .

Caution Do not put anything that might limit ventilation on the top of the

device.

Caution: The operator should always be vigilant about security while operation

of thi s equipment. You must be familiar suffic iently with the equipment to

identify any failure that could be dangerous. If there is a malfunction occurs or

known security problems of the equipment, do not use it before the problem

have been solved by qualified personnel.

Note

Users responsible for providing communication tool between operator

and patients.

WarningThis equipment on ly allow to operate by professionals who have

trained and qualified, or use under the guidance of these professionals.

CautionAlways watch al l parts of the system to ver ify that there is nei ther

interference nor possibility of collision with the patient or with other

equipment.

WarningIt is the responsibil ity of the operator to ensure the safety of the

patient while the X-ray equipment is in operation by visual observation , proper

patient posit ioning, and use of devices that are intended to prevent patient

injury.

Note

In the event of an emergency, the equipment is turned off by forcibly

pressing the Emergency Stop switch (red mushroom-shaped switch).

CautionThe environment condition must meet the requirements of normal

operation of equipment. Turn off and pull down the power supply breaker after

using the equipment.

Note

The maintenance should be taken termly to make sure a cont inues and


13/47


Operation

5

safety use of the equipment.

NoteProducts in transit There must be a fixed measures to prevent shaking

when products in transit; and must be covered with felt cloth if in gondola

transpor tation. Please contact me If the product is found damaged, malfunct ion,

or any other questions.

Warning

The power supply must be cut before replacement of the fuse.

2.3 Responsibilities

Ensure that all personnel authorized to use the equipment are aware of the danger of

excessive exposure to X-ray radiation.

The equipment herein described is sold with the understanding the manufacturer, its

agents, and representatives are not liable for injury or damage which may result from

overexposure of patients or personnel to X-ray radiation.

The manufacture does not accept any responsibility for overexposure of patients or

personnel to X-ray radiation generated by this equipment which is a result of poor

operating techniques or procedures.

No responsibility will be assumed for any equipment that has not been serviced and

maintained in accordance with the manufacturer instructions, or which has been modified

or tampered with in any way.

It is the responsibility of the operator to ensure the safety of the patient while the X-ray

equipment is in operation by visual observation, proper patient positioning, and use of the

devices that are intended to prevent patient injury.

Should any interference (EMC) be detected with other equipment, please position other

equipment away from this one.

2.4 EMC

For the intended use, this X-ray system complies with the EMC. This includes definitions


14/47


Operation

6

on permitted levels on electromagnetic emission and requirements on immunity against

electromagnetic emissions from other equipment.

It is not possible, however, to exclude with absolute certainty the possibility that other high

frequency electronic equipment, which is fully compliant to the EMC regulations, will not

adversely, affect the operation of this system. If the other equipment has a comparatively

high level of transmission power and is in close proximity, these EMC concerns (the risk of

interference) may be more pronounced. It is therefore recommended that the operation of

equipment of this type such as mobile telephones, cordless microphones and other similar

mobile radio equipment be restricted from the vicinity of this X-ray system.

Explanation

Electronic equipment that satisfies the EMC requirements is designed so that under

normal conditions there is no risk of malfunction caused by electromagnetic interference.

However, in the case of radio signals from highfrequency transmitters with a relatively

high transmitting power, the risk of electromagnetic incompatibility when operated in close

proximity to the equipment cannot be totally ruled out.

For this reason, all kinds of transmission with mobile radio equipment should be avoided.

This also applies when the equipment is in standby mode.

Mobile telephones must be switched off in designated problem zones.

2.5 Radiation protection

2.5.1 X-ray protection

Warning: Ensure that before performing any fluoroscopy or radiography all the

necessary radiation pro tection measures have been taken.

Although this apparatus is built to the highest safety standards and 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


15/47


Operation

7

operator to take adequate precautions to prevent the possibility of any persons carelessly,

unwisely, or unknowingly exposing themselves or others to X-radiation.

It is important that everyone working with X-radiation be properly trained and take

adequate steps to insure protection against injury. The manufacturer assumes that all

operator and service personnel authorized to use, install, calibrate and maintain this

equipment is cognizant of the danger of excessive exposure to X-radiation, is sufficiently

trained and has the required knowledge for it. The equipment herein described is sold with

the understanding that the manufacturer, its agents, and representatives are not liable for

injury or damage which may result from exposure to X-radiation.

Influence of some X-ray has accumulative effect and has couple of months even years of

latency period. As for the operator, the safest principle is avoid direct X-ray at any time.

Any substance in X-ray path may cause secondary radiation (scattered rays). Intensity of

the secondary radiation depends on energy and intensity of initial ray and atomic number

of substance irradiated. Intensity of the second ray may be stronger than that arrived on

the film, and therefore, proper measures shall be taken to prevent this second ray.

Necessary preventive measures for X-ray:

1. Time protection

The longer the radiation time is, the higher the absorbed dose accumulated will be, for this

reason, irradiation time shall be shortened as for as possible, all persons shall shorten

their time staying in the X-ray room. X-ray operator shall properly adapt to darkness to

shorten irradiation time, irradiation condition shall be optimum to avoid film waste.

2. Distance protection

Irradiation quantity is inversely proportional to square of distance, i.e. when distance

between person and X-ray source (focus) increases one time, irradiation quantity will be

reduced to 1/4 of original quantity, and therefore, all persons (except for the person

examined) shall be stay away from the X-ray source as far as possible during operation of

X-ray unit; distance between skin of the person examined and focus shall be increased as

far as possible.

3. Shield protection

During X-ray therapy or diagnosis, time and distance protections maybe restrained, in this


16/47


Operation

8

case, a more effective protection shall be taken, i.e. shield protection. Lead shield is an

effective way. To reduce radiation, following items maybe used: lead shield, lead rubber

gloves, lead rubber apron, lead glasses, lead protective chair and lead protective vehicle.

X-ray protective wall may also be used to reduce radiation. Lead shield shall have

thickness not less than 2mm, or equal to 2mm lead equivalent, personal protective gears

(such as apron, gloves and etc) shall have lead thickness not less than 0.25mm, or equal

to 0.25mm lead equivalent. To meet particular basic protection requirement, you are

suggested to refer to national or local X-ray protection sanitation standard.

Note: During operation or maintenance of X-ray equipment, hand, wrist, arm or

any other parts of body shall not exposed under direct X-ray.

During operation, followings shall be observed:

Radiography stand shall be placed at side close to the wall to avoid X-ray direction

opposing to the console, adjacent room, dark room and corridor shall be protected

from direct irradiation of useful ray.

Distance is the most effective radiation protection. Keep as far away as possible from

the exposed object and from the Xray tube assembly.

Wear protective clothing. Radiation protection aprons with a lead equivalent of 0.35

mm attenuate Xradiation at 50 KV by 99.95%, and at 100 KV by 94.5%.

Avoid working in the direct beam of radiation. If this is inevitable, protect yourself.

Wear radiation protection gloves.

Select as short a fluoroscopy time as possible. This will reduce total radiation dose

considerably.

Wear a personal dosimeter (film badge).

For radiation protection of the patient use radiation protection accessories in addition

to the devices on the Xray equipment(e.g. diaphragm, spacers, filters).

Always use the smallest Xray beam collimation. Scattered radiation is largely

dependent on the volume of the exposed object.


17/47


Operation

9

If possible, use large focal spot to skin distances in order to keep the patients skin

dose as low as reasonably achievable.

If area to be irradiated close to generative organ, the patient shall wear lead rubber

apron (generative organ protective cover or lead rubber cover) to minimize irradiation

damage to the patient.

Please note that all materials located in the Xray beam between patient and image

receptor (e.g. film) affect the image quality and the patient dose.

Please make sure that during the whole examination the audio and visual

communication between the operator and the patient is guaranteed, if necessary by

technical means (e.g. intercom).

Warning: Safety circuits which prevent X-radiation from being switched on

under certain cond itions must never be removed or altered.

2.5.2 Radiation protection standard

The key in radiation protection standard is dosage limitation standard. Various X-ray

radiation studies provides reference for permitted maximum X-ray radiation dosage. Our

Regulation for Radiation Protectionspecify maximum permitted dosage and limited dose

equivalent for X-ray radiation (these limits shall be updated frequently for continuous

emergence of new information) referring to ICRP protection standard. See table 2 below:

Table 2 Radiation protection dosage limit (1974)

Area irradiatedProfessional

0.01Sv per year

Public

0.01Sv per yearCategory oforgans

Name of organ

Category IWhole body, sex gland, red marrow

and intraocular lens5 0.5

Category II Skin, bone and thyroid gland 30 3


18/47


19/47


Operation

11

radiation protection measures shall be taken. The radiation dose shall not

exceed permitted dose.

The method for radiation dose measurement which is frequently used but not

accurate is place the film in a key position for a period of time, and then the film is

flushed to determine the radiation dose.

A general method to determine excessive radiation is to use wear radiation dose plate

which contains X-ray sense film or thermoluminescence material. Although this plate

measures radiation only for part wearing the plate, it still indicates radiation quantity at

some extent.

2.6 Fire safety

Warning:

Only use extinguishers on electrical or chemical fires. Using water or other

liqu ids on an electrical fire can lead to fatal or other serious personal

injury.

Ventilation apertures must not be covered while the equipment is switched

on.

To assure proper cooling of the collimator in case the lamp is switched

on make sure that the ventilation holes are NOT obstruc ted.

2.7 Electrical safety

Only trained maintenance staff may remove the covers from the high-voltage cable of the

X-ray tube assembly and the high-voltage generator.

Warning:There will be a potential risk of electric shock if the equipment is not

properly grounded. Before operation, be sure the equipment has been

connected all the safety ground wi re.

Warning:If the equipment needs to do a electrical or mechanical connection to


20/47


Operation

12

any equipment from other manufacturers, please contact the manufacturer to

confirm the reasonableness, for the result of injury to persons or equipment

damaged which cause by the connection without permission, the manufacturer

assumes no responsibility. Make sure they meet standard GB9706.15, and

re-examine of the leakage current and other safety performance indicators of

the entire system is needed to avoid the possibility harm caused by leakage

superposition.

Danger: Complete systems voltage can be fatal; you must be taken attention to

avoid contact with these voltages.

Warning: To avoid risk of electric shock, before maintain the equipment you

must disconnect the power and unplug the power plug.

Warning: Do not use the equipment in a flammable gases or in environment

which has anesthetic, in order to avoid an explosion.

Warning:Do not open the cover of this equipment arbitrarily in order to avoid

the risk of electric shock.

Warning: Do not let any liquid seep into the device, the liquid seep into the

electrical circuit may aggravate the current leakage or damage of the

equipment.

Warning: It must not be forced to use if there is any electrical or mechanical

failure of equipment, the equipment protection circuit and protect the facilities

also shall not be remove to make equipment work s ick.

Warning: In order to ensure the safety of equipment, electrical safety testing

must be take in accordance with local safety regulations.


21/47


Operation

13

2.8 Mechanical safety

Warning:

Be careful to ensure that hands and loose clothing remain clear of moving

parts.

Remove all objects from the radius of movement of the X

ray equipment.

Please ensure that the patients stands or l ies safely during the

examination.

Emergency stop: In case of danger all movements can be stopped

immediately by pressing the emergency stop button.

2.9 Disposal

The manufactory design and manufacture the X-ray equipment according to the

requirements of safety and environmental protection. Assuming no parts of the system

housing are opened and assuming the system is used properly there are no risks to

persons or the environment.

To comply with regulations it is necessary to use materials, which may be harmful to the

environment and therefore have to be disposed of in a proper manner.

Warning:

For this reason you must not dispose of the Xray equipment together

with normal industrial or domestic waste.

Supports you in disposing of the Xray equipment described in a proper

manner.

Returns reusable parts to the production cycle via certified disposal

companies and

thus helps to reduce environmental pollu tion.

Please contact the manufactory or your municipal waste collection facility for information


22/47


Operation

14

on proper disposal.

2.10 Designated signif icant zones of occupancy

Xray equipment specified for any radiological examination shall have at least one

significant zone of occupancy for the use of the operator and staff, designated as follow:


23/47


Operation

15

Chapter III General and mot ion controls

The radiography table of the system can be coupled with various types of X ray units to

perform Bucky radiography to all parts in the human body. It has characteristics as follows:

The table has a floating tabletop, which is longitudinal and transverse movable under

control of switch and electromagnetically locked up. The column is designed as free of

floor-to-ceiling rail and may perform 180 rotation, and localized at 90. Vertical stroke of

the tube moving along the column is not less than 1100mm; the tube may perform 180

rotation and can be locked up at any angle. A particular characteristic of the machine is:

the column and the Bucky are synchronously movable by manual operation, and are

mechanically and automatically localized and disconnected, this design simplifies

procedure and improves reliability of alignment of X-ray tube with Bucky diaphragm and

ensures quick and accurate radiography for infection focus.

Note: Characteristics and technical parameters of the radiography table may

vary with requirements of customer.

The equipment has composition structure as follow:

X ray tube assembly

Control Panel

Manual collimator

X ray tube support frame

Column

Bucky

Tabletop

Radiography table device (including column guide rail)

Footswitch

Additional pair of high voltage cables shall be provided.


24/47


Operation

16

1 Column 2 Control console 3 X-ray tube assembly 4Collimator 5 Table

6 Bucky 7Footswitch 8 Stand Check 9 Film box

Figure 3-1 Arrangement of main parts of machine

3.1 Funct ions of keys on Control Panel

1 Emergency stop switch 2 Dititron 3 Power indicator 4 Buttons 5 Operation Handle

Figure 3-2 Control panel

8

9


25/47


Operation

17

The functions of the buttons are shown as the following table:

Keep pressing the button, then use the operation handle to perform

the tube rotation. The rotation will be locked if release the button.


the tube up/down movement. The movement will be locked if release

the button.


the column longitudinal and tube up/down movements. The

movements will be locked if release the button.


the column longitudinal movement. The movement will be locked if

release the button.

3.2 Radiography table operation

1. Startup Self Test: after plugging to power supply, power indicator on manual

Control Panel lights up, while the six digital tubes are all lit on.

2. Trample the footswitch and hold it, bed is in suspending status, for free movement

of bed in longitudinal and lateral directions; loose footswitch, and the bed will

immediately lock up and stop at the existing state.

3. When film box support button switch is pressed down, film box support has freelongitudinal movement; loose film box support button switch, and the film box

support will immediately lock up and stop at the existing state. With hand holding

film box plate handle, manual lateral movement of film box support can be made.

Make counterclockwise rotation to lock up handle to level position, open the port,

put film box in, align film box center line to lock plate gap and then, push inward

and tighten lock plate, make a clockwise rotation to lock up the handle, for holding

film box.

4. With both hands holding controller handle, press and hold Button , manual


26/47


Operation

18

rotation of tube can be made. Loose this button and it immediately lock up and

stop at the existing state.

5. With both hands holding controller handle, press and hold Button , manualup/down movement of tube can be made. Loose this button and it immediately

lock up and stop at the existing state.


column longitudinal and tube up/down movements can be made. Loose this

button and it immediately lock up and stop at the existing state.


column longitudinal movement can be made. Loose this button and it immediately

lock up and stop at the existing state.

8. The digital tube indicates tube rotation angle.

9. The digital tube indicates source-film distance.

10. By holding manual controller handle, bi-directional 180 rotation of column can be

made along Z-axis, to achieve stretcher photography (optional function).

Note: In emergency cases where it needs to shut down power supply, press

Emergency Stop Switch; after dangerous condition is eliminated, clockwise

rotating button can resume power supply.

3.3 Footswitch

Trample the footswitch and hold it, bed is in suspending status, for free movement of bed

in longitudinal and lateral directions; loose footswitch, and the bed will immediately lock up

and stop at the existing state.

3.4 Generator control console

The Generator Control Console includes the controls, indicators and displays needed to

perform radiographic exams. (Refer to Section IV for description).

3.5 Collimator controls

Collimator is a main part for X-ray radiation protection. Manual adjustment for knobs in X

and Y directions based on SID distance may control range of radiation beam (slightly


27/47


Operation

19

larger than radiography range) to protect patients from excessive radiation. Illuminated

light key in the middle may clearly reflect exposure range and center line light marked is

also provided.

Collimator controls consist of a push-button to switch ON the Collimator Lamp and two

knobs to open or close the internal blades.

After pressing the push-button of the Collimator Lamp, it remains illuminated for a few

seconds before automatically switching off.

Prolonged lighting without allowing the lamp sufficient time to cool causes the collimator to

overheat in the internal area near the lamp.

The Exposure Field is adjusted by setting the two knobs. The table on the Collimator

Panel shows the number to set with the knobs to open the blades according to the SID

and cassette size to be used.

Figure 3-3 Collimator

3.6 Bucky photography

After release of brake for column vertical movement, column may be moved to couple and

synchronize with the Bucky, when these two reach to designated position for radiography,

the electromagnetic braking system acts to lock up the device. X ray radiation field

indicated by the light shall be aligned with radiographic area through starting up the

manual collimator to move the tabletop, and then the radiography key of Bucky

diaphragm on generator consol shall be pressed, and adjustment for tube voltage,

current and duration of exposure for radiography of Bucky shall be made, finally the Bucky

radiography can be performed.


28/47


Operation

20

Chapter IV Control console

4.1 Console operation

4.1.1 Names of console keys

All controls and displays of the generator are arranged on the console, key on console

sounds for prompt and LED indicator works. Console panel is indicated in figure below:

1. Radiography key

2. Fluoroscopy key

3. Power On

4. Power Off

5. Fluoro KV increase

6. Fluoro KV decrease

7. Fluoro KV display

8. Radiography KV increase

9. Radiography KV decrease10. Radiography KV display

11. Radiography mA display

12. Radiography mA position

decrease

13. Radiography mA position increase

14. Fluoroscopy mA display

15. Fluoroscopy mA position decrease

16. Fluoroscopy mA position increase

17. ABC selection

18. Reset/Clear/Esc19. Fluoro accumulation time display

20. Shortcut UP key

21. Body AP key

22. S/mAs switch

23. Radiography S mode indicator

24. Radiography S/mAs display

25. Radiography mAs mode indicator

26. Radiography S/mAs decrease

27. Radiography S/mAs position decrease

28. Radiography S/mAs position increase

29. Radiography S/mAs increase

30. Body LAT key

31. Shortcut DOWN key

32. Common fluoroscopy selection

33. Pulse fluoroscopy selection

34. Fat figure selection

35. Normal figure selection

36. Thin figure selection

37. Children selection38. AEC 1 selection

39. AEC 2 selection

40. AEC 3 selection

41. Store key

42. Large focus selection

43. Small focus selection

44. Bucky diaphragm selection

45. Film selection

46. Tube 1 selection

47. Tube 2 selection

48. Common radiography table selection

49. Chest unit selection

50. Tomography tableselection

51. Cradle selection

52. Density decrease

53-57. Density indicator

58. Density decrease key

59. Exposure indicator

60. Prep.

61. Ex osure


29/47


Operation

21

Note: It is not that all keys are valid, but depending on the system configuration

and requirements of customer.

Ready and exposure key on generator console are controlled in parallel with X-ray hand

brake which connected to the console. X-ray handle switch has three status, i.e. close,

ready and X-ray exposure, these functions are as same as ready, exposure function key

on the console, large focus and small focus selective keys has been shielded, press on

these keys will be ineffective, switching method of focus are as follows:

1Press radiography mA increase/decrease key on control panel of the console to set

small focus status when 32--160 is displayed in radiography mA screen.

2) Press radiography mA increase/decrease key on control panel of the console to set

large focus status when 200--630 is displayed in radiography mA screen.

4.1.2 Console key actions

1 Radiography key. When this key is pressed for radiography check, indicator lamp

above the key illuminates to indicate that the machine is in radiography status.

2 Fluoroscopy key. When this key is pressed for fluoroscopy check, indicator lamp

above the key illuminates to indicate that the machine is in fluoroscopy status.

3 Power On: When this key is pressed, main power of generator is on and indicator

lamp above the key illuminates.

4 Power Off: When this key is pressed, main power of generator is off.

5Fluoroscopy kV increase. Each press of this key increases setting KV for fluoroscopy by

1kv, continuous press may rapidly increase kV value.

6Fluoroscopy kV decrease. Each press of this key decreases setting KV for fluoroscopy

by 1kv, continuous press may rapidly increase kV value.

7Fluoroscopy kV display. When fluoroscopy or film check is selected, the screen displays

fluoroscopy KV setting value. When radiography check is selected singly, the screen


30/47


31/47


Operation

23

are any faults on the generator, the console displays fault information code, press of this

key may clear fault code and return to standby; in maintenance status, press of this key

may escape from maintenance status.

19Fluoroscopy accumulating time display: this screen displays accumulated fluoroscopy

time. Accumulated time in the first digit indicates minute, each flash of second digit "--"

indicates 2 seconds, accumulated time in the third digit indicates 10 seconds, for example,

"2-4" refers to 2 minutes and 40 seconds.

20 Shortcut UP key. Each press of this key may move the radiography place up by

one step.

21 Body AP key. Press this key to select body AP. The indicator lamp above the

check key lights up to indicate body AP.

22 S/mAsmeasurement mode switch / maintenance key. When this key is pressed,

the measurement mode of X-ray radioactivity switches between the S and mAs;

continuous press of this key may enter into maintenance state.

23S mode indicator. The indicator lamps up to show it is measured in S.

24 S/mAs display. This screen displays radiography S/mAs setting value when

radiography or film check is selected. When fluoroscopy check is selected singly, the

screen displays "-----", indicating that radiography check is ineffective.

25mAs mode indicator. Illumination of the indicator lamp indicates measurement in mAs.

26Radiography S/mAs fine adjustment decrease. Each press of this key decreases

radiography S/mAs setting value by 1 S/mAs, continuous press may rapidly decrease

S/mAs value.

27Radiography S/mAs decrease. Each press of this key decreases radiography S/mAs

setting value by 1 step. (the machine separates steps according to R10 prior factor).

28Radiography S/mAs increase. Each press of this key increases radiography S/mAs


32/47


Operation

24

setting value by 1 step.

29Radiography S/mAs fine adjustment increase. Each press of this key increases

radiography S/mAs setting value by 1 S/mAs, continuous press may rapidly increase

S/mAs value.

30 Body LAT key. Press this key to select body LAT. The indicator lamp above the

check key lights up to indicate body LAT.

31 Shortcut DOWN key. Each press of this key may move the radiography place

one position down.

32 Genearl fluoroscopy selection. When this key is pressed for general fluoroscopy

check, indicator lamp above the check key lights up to indicate that the machine is in

general fluoroscopy state.

33 Impulse fluoroscopy selection. When this key is pressed for impulse fluoroscopy

check, indicator lamp above the check key lights up to indicate that the machine is in

impulse fluoroscopy state.

34 Fat patient selection. Press this key to select fat patient. The indicator lamp

above the check key lights up to indicate fat patient.

35 Normal patient selection. Press this key to select normal patient. The indicator

lamp above the check key lights up to indicate normal patient.

36 Thin patient selection. Press this key to select thin patient. The indicator lamp

above the check key lights up to indicate thin patient.

37 Child patient selection. Press this key to select child patient. The indicator lamp

above the check key lights up to indicate child patient.

38 AEC area 3 selection. Press this key to select AEC area 3. The indicator lamp

383940


33/47


Operation

25

above the check key lights up to indicate AEC area 3.





41 Storage key: When this key is pressed in the status of maintenance, the

modified data can be stored.

42 Large focus selection: When this key is pressed, select the major focus of the

tube,indicator lamp above the key illuminates to indicate to select the major focus.

43 Small focus selection: When this key is pressed, select the small focus of the

tube,indicator lamp above the key illuminates to indicate to select the small focus.

44 Bucky diaphragm selection: When this key is pressed, indicator lamp above the

key illuminates to indicatethat the Bucky diaphragm is used during exposure process;

When this key is pressed again, indicator lamp goes out to indicate that Bucky

diaphragm is not used during exposure process.

45) Filmselection: When this key is pressed, select the function of film check,

indicator lamp above the key illuminates to indicate that the function of film check is

used.

46) Tube 1 selection: When this key is pressed, select the first tube, indicator lamp

above the key illuminates to indicatethat tube 1 is used.

47) Tube 2 selection: When this key is pressed, select the second tube, indicator

lamp above the key illuminates to indicatethat tube 2 is used.

48 Common radiography table selection: When this key is pressed, select common

radiography machine, indicator lamp above the key illuminates to indicate that the

2

1


34/47


Operation

26

common radiography machine is used. When indicator lamp of the Bucky diaphragm

illuminates and indicator lamp of the common radiography machine illuminates to indicate

that common radiography machine Bucky diaphragm is used during the exposure

process.

49 Chest unit selection: When this key is pressed, select vertical chest unit,

indicator lamp above the key illuminates to indicate that the vertical chest unit is used.

When indicator lamp of the Bucky diaphragm illuminates and indicator lamp of the vertical

chest unit illuminates to indicate that vertical chest unit Bucky diaphragm is used during

the exposure process.

50 Tomography table selection: When this key is pressed, select radiography

tomography machine, indicator lamp above the key illuminates to indicate that the

radiography tomography machine is used. When indicator lamp of the Bucky diaphragm

illuminates and indicator lamp of the radiography tomography machine illuminates to

indicate that radiography tomography machine Bucky diaphragm is used during the

exposure process.

51 Cradle machine selection: When this key is pressed, select cradle machine,

indicator lamp above the key illuminates to indicate that the cradle machine is used. When

indicator lamp of the Bucky diaphragm illuminates and indicator lamp of the cradle

machine illuminates to indicate that cradle machine Bucky diaphragm is used during the

exposure process.

52Density decrease: When this key is pressed, density selection adjusts and decreases.

53Density indicator.




-2 -1 0 +1 +2DENSITY

52 53 54 55 56 57 58


35/47


Operation

27


58Density increase: When this key is pressed, density selection adjusts and increases.

59 Exposure indicator: Exposure duration indicator. The indicator lamp goes out

when no load is applied; the indicator lamp illuminates until the end of the exposure

duration during exposure.

60) Prep.: When this key is pressed during the process of photography or film

check, the following functions can be activated: anode (anode) rotation, the filament

current turns to heating status of the selected mA from standby mode. The indicator lamp

above the key illuminates to indicate that the X-RAY TUBE is ready for exposure. Hand

brake switch is used in the machine (press the position 1 of hand brake switch for this

function).

61 Exposure: Press this key when preparation indicator lamp illuminates to start

the X-ray exposure until the end of the exposure time. If the key is released halfway, the

exposure with immediately terminate. If the preparation indicator lamp does not illuminate,

pressing this key is invalid. Hand brake switch is used in the machine (press the position 2

of hand brake switch for this function).

4.2 Start-up procedure

Switch on the system distribution switch, the system will start power-on self test. Except

the power indicator lamp, all strokes of other indicator lamps and digital tube at the

console alternately illuminates for display inspection; after the self test, the KV parameters

display screen shows "OFF" or "E". At this time, auxiliary power of generator and the

computer control circuit are in normal operation. However, the main power has no

electricity, and the high-voltage generator is in sleep status.

Press "start" key on the console, KV display screen shows starting values. After

completion of start, the display screen shows the parameters before the last shutdown,

representing that the main power of generator is on.


36/47


Operation

28

Press "shut down" key on the console, the main power of generator is off.

4.3 Common radiography operations

4.3.1 Typical radiography order

1Adjust patients position

2Press the radiography inspection selection key on console to select the mode.

3Press Radiography kV increase/decrease key to select the Kv parameters.

4Press Radiography mA increase/decrease key to select the mA parameters.

5Press to select the S measure mode or mAs measure mode.

6Press radiography s/mAs increase, decrease key to select the s/mAs parameters.

7Select common radiography machine Bucky diaphragm or vertical chest radiography

stand Bucky diaphragm or no use of Bucky diaphragm.

8Press the preparation key on console or press the position 1 of hand brake switch until

the preparation indicator lamp lights

9Guide the patient to stay with the proper posture and keep his breath, press the

exposure key on console or the position 2 of hand brake switch until the exposure time

reaches. The exposure will be terminated as soon as the key or switch is released during

its procedure. When the preparation indicator lamp is not bright, operation of the exposure

key or the position 2 of hand brake switch will be invalid. During the exposure procedure,

the indicator lamp of X-ray exposure always lights, and there is the sound of di- when the

exposure starts and ends.

10Repeat the above steps when additional one exposure is required.

4.3.2 Customize the shortcut technology

Featured with the performances of radiation inspection technology parameters (16*2*4

equals to 128 shortcut radiation information) for memorizing 16 parts of body, two kinds of


37/47


Operation

29

postures and four forms of patient, the shortcut technology can be customized with the

following steps:

1Firstly, press the key S/mAs and release it until the buzzer sends two sounds of Di-,

and the system enters into the status of data query.

2Press the kV increasing or kV decreasing key to adjust the display value to be O,

when it displays O, press mA increase and decrease key to modify the display screen

and modify the right password to be 88. Press "storage key" to store the value.

3Press Reset/Clear/Escape key to exit.

4Continuously press the storage key and release it until there are two Di-

sounds of buzzer, at present, the system has entered into shortcut technology

programming status.

5Select the radiation parts through pressing the upper and lower keys; press the

corresponding keys to select the entopic or side position. The storage technology

parameters of radiation part will be displayed on control panel. For example, if it is desired

to edit the storage technology of lumbar part, press the upper or lower key to light the

lumbar by the Led of body figure lumbar position.

6Select the corresponding technology, equipment and optimal radiation parameters.

7Press storage key to store the technology parameters

8Repeat the steps of 1, 2, 3and 4to edit the parts

9Press off key to exit the status of shortcut programming.

10Restart the machine and inspect whether the shortcut parameters are programmed

successfully.

4.3.3 Taking radiography with shor tcut technology

Selecting the radiation parameter with shortcut technology mode could set the optimal

radiation parameters rapidly, avoiding the user to memorize all kinds of common radiation


38/47


Operation

30

parameters, and simplify the parameters setting. Upon shortcut technology, the

radiography steps can be listed as:

1Adjust the patients position

2Press the radiography inspection selection key on console to select its mode

3Press the UP or Down key respectively or continuously to select the radiation parts.

4Select one of four patients postures according to the patients posture.

5Press the entopic or side key to select the entopic or side position.

6The radiation parameters stored in the machine will be shown on console with the steps

of 3, 4 and 5. If the parameters need to be modified, press the corresponding keys,

however, the modification has no influence on former stored parameters, and the indicator

lamp related to shortcut mode will be distinguished, which indicates that it is different from

the setting parameter of shortcut mode, the parameters on the display panel are effective.

7Press the preparation key on console or press the position 1 of hand brake switch until

the preparation indicator lamp lights.

8Guide the patient to stay with the proper posture and keep his breath, press the

exposure key on console or the position 2 of hand brake switch until the exposure time

reaches. The exposure will be terminated as soon as the key or switch is released during

its procedure. When the preparation indicator lamp is not bright, operation of the exposure

key or the position 2 of hand brake switch will be invalid. During the exposure procedure,

the indicator lamp of X-ray exposure always lights, and there is the sound of Di- when

the exposure starts and ends.

9Repeat the above steps when additional exposure is required.

Note: when the generator connected to console has no fluoroscopy or film

check function, the keys of fluoroscopy or f ilm check is invalid.


39/47


Operation

31

Caution

In six seconds when the preparation indicator lamp lights, there is no

exposure operation, generator exits to the preparation status automatically,

press Preparation key again to enter into exposure. Ordinarily, the

preparation period is 1 to 2 seconds. During installation , it is set according

to the specifications of X-RAY TUBE. When there is malfunction, the

exposure will be stopped automatically, and error information will be

generated.

When the machine is turned off, the system switch should be pulled down

to cut off the power of generator completely. Even the power supply is

turned off, still high voltage which is dangerous to life exists in generator

cabinet.

Some time is required to preheat the X-RAY TUBE, and as anticipated, its

period is 30 seconds.

Work loading should be less than 80% of total in 10 minutes after the

machine is s tarted.

4.4 Error codes

The generator is capable of self-diagnosis. It can give signals to report big problems,

helping with repair a lot. For trouble-shooting, normally, check the power supply system

first and then the auxiliary power supply of the generator.

When the system goes wrong, the KV screen on the console will display the

corresponding error code as the figure 4-1 shows:

Figure 4-1 Error code illustration


40/47


Operation

32

Fig. Error code display

Error

code Where and what is the problem? Trouble-shooting

E00 Abnormal power or fault of input circuit

Check normality of AC power and

replace the circuit board of the

interface unit by professional

servicemen.

E01

Overcurrent or fault of inverter

discharge of BR1. X-ray tubes or HTparts and lead to over-loading.

Check HT circuits and the inverter

and replace faulty parts by

professional servicemen.E02

Overcurrent or fault of the inverter

discharge of BR2. X-ray tubes or HT

parts and lead to over-loading.

E03Failure of cathode heating or the fault

of heating driver circuit

Check HT circuits and the bulb tube

and filament heating circuit and

replace faulty parts by professional

servicemen.

E04 Failure of anode heating or the fault ofanode heating driver circuit

Check anode motor circuits and

anode drivers and replace faulty parts

by professional servicemen.

E05 The machine fails to start.

Cut off all power supply, start the

machine two minutes later. If the

trouble is still there, check the

interface board, communication

cables and the console by

professional servicemen.

E06 The machine fails to shutdown.

Cut off all power supply, start the

machine two minutes later. If thetrouble is still there, check the

interface board, communication

cables and the console by


E07 Self-diagnosis fails.

Controlling system hardware problem;

to be checked by professional

servicemen. Parts to be replaced.

E08 Resetting fail.

E09 The internal radiating port fails.

E10 The protective circuit of the inverterfails.


41/47


Operation

33

E11 The focus switching fails.

E12 The Bucky diaphragm failsCheck normality of electrical

connection of Bucky diaphragm.E13 Positive deviation of tube voltage.

Calibrated by professional

servicemen.

E14 Negative deviation of tube voltage.

E15 Positive deviation of tube current

E16 Negative deviation of tube current

E17 Positive deviation of voltage reference.

E18Negative deviation of voltage

reference

E19 Positive deviation of current reference

E20 Negative deviation of current reference

E21 Invalid parameters

E22 Invalid orders

E23 Automatic reset of main system

E24 EEPROM is not initializedInitialized debugging performed by



42/47


Operation

34

Chapter V Maintenance of equipment

5.1 Surface cleaning

1. After one-month operation, user may spray Pledge on equipment surface, and

then wipe the surface with dry gauze or tower.

2. During operation, proper surface cleaning and protection shall be performed; after

use by patient with infective disease, the machine, in particular to the tabletop

shall be disinfected and sterilized (wiping with clean gauze dipping with 70%--80%

alcohol).

3. The collimator housing must be cleaned by the operator using non-abrasive

cleaning products at disconnect supply. Care must be taken to prevent liquid from

entering the collimator. N.B. the collimator cover is not watertight. Do no re-apply

power if inflammable liquids have leaked into the collimator.

Note: DO NOT clean the equipment when it i s electrified for runn ing. DO cut off

the power before cleaning.

5.2 Routine check and maintenance

Caution: Do not remove the casing or internal elements in the cabinet and

conso le. Damage to personnel or the machine caused by ignoring this attention

is no responsibility of the manufacturer

1. The machine shall operate in dry and clean environment. Machine unused in long

term shall be covered by dustproof film.

2. All bearings and moving parts shall be checked regularly; friction surface shall be

cleaned and lubricated.

3. During normal operation, steel wire shall be checked regularly. Any breakage of

wire shall be promptly notified to the professional technicians approved by the


43/47


Operation

35

company for replacement.

4. User shall regularly check dust inside through front and back covers after half or

one year of operation, as the case may be. Check shall focus on various switches

and contacts for their electrolytic corrosion and uncleanness, which shall be wipe

out with gauze dipping with medicinal alcohol, switches and contacts suffering

serious corrosion or pollution shall be replaced. In addition, components and

wiring connectors shall be checked for loose and displacement, tighten them, if

required.

Note: This step shall be performed only by trained service personnel.

5. During operation, power voltage shall be maintained in normal level. In the event

of occurrence of over-high, over-low, surge voltage and other abnormalities, the

operation shall be suspended till the cause has been found and trouble-shooting

measures has been taken accordingly.

6. All knobs and keys of the controller shall be gently operated; overexertion shall be

avoided to prevent dislocation, damage or poor contact, even breakage.

7. Protective yellow/green ground wire shall be checked frequently for good

connection.

Note:

Operation of X-ray tube assembly shall be careful to avoid impaction.

Training shall be performed before use of tube assembly that is unused in

long term or replaced new tube assembly.

Please operate the device at permitted heat units of the tube assembly and

the external case temperature shall be not more than 70

.


44/47


Operation

36

Chapter Technical descript ion

6.1 Radiation protection requirement

1. Filtration of X-ray tube assembly

Additional filter 1.5mm AI equivalent, total filtration exceeds 2.5mm AI equivalent.

2. Limitation of X-ray equipment radiation beam

Range of X ray radiation beam is adjustable through manual operation of two knobs

on the collimator panel. At 1m away focus and on the plane perpendicular to the

tabletop, selectable minimum size of X ray radiation beam shall be less than 15mm x

15mm.

3. Position of reference axis and distance between focus and image receptor

During normal operation, reference axis of X-ray field is perpendicular to the cassette.

Notch of the cassette clamp shall be aligned with reference light of radiation field if

required during radiography. X-ray source assembly is adjustable continuously; SID

value can be read on scale of the column.

4. Corresponding relationship between X-ray field and image receptor

1) Under the circumstance that the cassette plane is perpendicular to the

reference axis (3 tolerance) , the measurement shall indicate that the sum of

deviations between edges of the receptor and edges of X ray filed shall be

not more than 3% of SID indicator value.

2) Sum of deviations between X and Y axial directions shall be not more than

4% of SIC indicator value.

5. Distance between focus and skin

To minimize and rationalize patients absorption for radiation, the operator shall

maintain distance between focus and skin as longer as possible.


45/47


Operation

37

6. Attenuation of X ray beam

To prevent excessive attenuation of X ray beam caused by the material inserted

between patient and X film, the tabletop panel adopts medium dense laminated panel.

7. Control of protection area

Radiography machine and console shall be installed separately. During loading,

operator or staffs are not required to approach the patient; the generator mainframe

may carry out following isolated control functions:

1) Selection and control of operation method

2) Selection of loading factors

3) Action of radiation switch

8. Position of focus and tolerance between focus and reference axis

Position of focus and tolerance between focus and reference axis is 55.40.37.

6.2 Main properties and technical parameters

Note: According to customer requirements and configurations, the equipment

may have different performances and main technical parameters, as per the

actual con figuration:

Radiography

table

bed movement

range

Longitudinal 950mm

Transverse 220mm

Size of tabletop 2100mm760mm

Height 700 mm

Movement of column and Bucky diaphragmsynchronously and manually

move

Film size 57- 14"17"

X-ray tube assembly vertical movement

range1100mm

X-ray tube assembly longitudinal

movement range1350mm

Rotation of column 180X-ray tube rotates around x ray tube 90


46/47


Operation

38

support frame center

Generator

Power supplyVoltage 380V AC

Frequency 50Hz

Radiography

Nominal output power 50kW

Tube voltage adjustment

range40kV - 150kV

Tube current adjustment

range32mA - 630mA

Load time adjustment

range0.003s - 6s

Grid

Size 15"18"

Grid ratio 10:1

Line density 103Focal distance 100cm/180cm

Tube

Maximum

Anode heat

units

300kHU

Tube Voltage 150kV

Maximum

power of tube20kW/50kW

Target material tungsten rhenium molybdenum (RTM)

Target angle 12.5

Focal 0.6/1.2mm

Anode rotating

speed (50Hz)2800 rpm /min

Collimator

Inherent

filtrationMinimum 1.2mm AL. Equivalent

Lamp timer 30s

Operation

modeManual


47/47

lwx-50p operation manual

Documents