stenoscop technical supplement 1173 pg

7/27/2019 Stenoscop Technical Supplement 1173 Pg

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NAME/ PAY#: COURSE: XR012 STENOSCOP 2 6000/9000

Series

REGION/COUNTRY: INSTRUCTOR(S):

SERVICE MANAGER: COURSE DATE:


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A

B

C

E

D


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NUMEROS

POS COMPOSANTS TYPE MODELE (USA)

A FRAME CONTROL CONSOLE 828 490 ZF0XCST2

B X R HEAD 828 520 ZH0HTST2

C COLLIMATOR for IMAGER 16 cm (6) 828 751 G 015 Z0A16ST2

22 cm (9) 828 752 G 015 Z0A22ST2

D CASSETTE HOLDER for IMAGER 16 cm (6)

24 x 30 cm 830 534 G 015

9,5 x 9,5 830 535 G 015 Z0L16ST2

CASSETTE HOLDER for IMAGER 22 cm (9)

24 x 30 cm 830 536 G 015

9,5 x 9,5 830 537 G 015 Z0L22ST2

E IMAGER 16 cm (6) 860 926 P 015 ZI016ST2

22 cm (9) 860 926 P 025 ZI022ST2

16cm (6) CDRH 860 926 P 035 ZI016ST2

22cm (9) CDRH 860 926 P 045 ZI022ST2

F MONITORS CART


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3A3 DIAPHRAGMES 2 828 978 G025


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32 CONNECTION THE SUPPLY

The mobile is factory wired for :228V/50Hz single phase networks (Europe)

OR 208V/60Hz single phase networks (U.S.A.)

A frequency adaptation on site requires adaptations in the mobile but also in the imager, memory and monitor

For the mobile, proceed as specified hereunder.

321 NETWORK ADAPTATION OF THE MOBILE

3211 9TR1 TRANSFORMER

The network adaptation is made at the transformer 9TR1 (diagram 110)

Connect wires marked A and B, and jumpers marked C and D as shown in the hereunder chart according to the

mains voltage and frequency.

RESEAU MAINS SUPPLYFil marqu FREQ

240V 228 V 220 V 208 V 200 V *120V

*108 V

*100V

Marqued wire

BORNES 9TR1 9TR1 TERMINALSAdaptation 50Hz 6 6 6 6 6 6 6 6


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Locking rood


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322 SUPPLY CABLE

For the mobile units wired for 208V(USA), the supply cable is delivered from the factory with its plug.

For the mobile units wired for 228V (Europe), the supply cable is delivered without a plug.

According to local regulations, connect a plug (min 16A single phase + earth) as follows :

blue wire : 228V

brown wire : 228V

yellow/green wire : earth

33 INTERCONNECTION

Connect the cable coming from the mobile unit to the plug 9PL1 situated on the back of the monitor holder.

Screw the fixing device in a clockwise direction.

Connect the supplementary equipotentiality cable to the earth terminal bar (CEI only).

Connected the network supply cable to the socket provided at the installation.

34 EQUIPMENT INSTALLATION

Put the apparatus under tension with the switch at the back of the monitor cart.

341 UNBLOCKING THE COLUMN


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M d l 1

Module 2

Module 3

Module 4

Module 5Module 6

Module 7

Module 8


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B

A

C

F

E G

ILLUSTRATION 11

Position de transport

Driving position

Classification

Appareil de type B ayant un degrapproprideprotection contre les chocs lectriques, en cequi concerne notamment

. Les courants de fuites admissibles (


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5. CHARACTERISTICS

5.1 MECHANICAL SPECIFICATIONS

5.1.1 Certification and identification labels

(see illustration 11)

A Tube housing assembly

B Image intensifier

C Xray control

D Cassette holder.

E F G Classification, certification, caution : illustration 11

5.1.2 Mobile Unit

Length : 249 cm (98) with full extension of Carm holder.

transit position

Width : 80.4 cm (31.7).

Height : 176 cm (69.4) with 16 cm (6) II (transit position)


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5.1.3 XRay tube head and collimator

The Xray tube HD 281 is in a STENIX housing of the following dimensions:

Width : 16.5 cm (6.5).

Height : 42.5 cm (16.7) with 22 cm skin guard

52.5 cm (20.7) with 32 cm skin guard (USA and CANADA)

Length : 39.8 cm (15.7).

The tube has a double focus, 0.5 x 0.5 mm and 1.8 x 1.8 mm and a stationary anode.

The 0.5 mm focus is selected to provide the best possible resolution in fluoroscopy.

The 1.8 mm focus provides good radiographic resolution

The red point on the Xray tube head shows the localization of the focus.

Leakage technique factor : 110 kVp 1 mA.

Filtration : HVL = 2.65 mm Al minimum at 71 KV


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5.1.8 CArm rotation about the horizontal axis

Rotation viewed from control console side : 290oclock wise.

120ocounterclock wise

Manual lock.

5.1.9 Orbital rotation of CArm

Image Intensifier 16 cm (6) and Stenoscop L EMotion: 115o(25obeyond vertical); manual lock.

Image Intensifier 22 cm (9)Motion : 105o(15obeyond vertical); manual lock

5.1.10 Dimensions and weight of the TV monitor

45.7 cm (18) width x 36.8 cm (14.5) high x 35.6 cm (14) depth screen diagonal 48 cm (19)

20 kg (44 lbs)

5.1.11 Radiographic cassette holder and grid

4 types are available, for all combinations


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5.1.12 Environmental specification :

complete unit, all options included

Operating temperature : 10oC to 40oC non condensing

Operating temperature variation : up to 10oC/HR permissible.

Storage temperature : 10oC to 70oC non condensing

Transportation temperature : 10oC to 70oC non condensing

Pressure : in operation : 700 to 1060 mB

Storage and transportation : 500 to 1060 mB

5.1.13 Heat dissipation:

maximum heat dissipation into the surrounding air.

For unit with two TV monitors and a video imager.

Standby : 475W

In fluoroscopy : (110 kV 4.5 mA) 1250W In radiography : 5800 W

5.1.14 Transport on inclines


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5.2 ELECTRICAL SPECIFICATIONS

5.2.1 Generalities.

The power supply requirements are 100, 108, 120, 200, 208, 220, 228, 240V (switched at installation).

Tolerance +/10%, 50/60 Hz single phase.

MAXIMUM LINE IMPEDANCE

100 108 120 200 208 220 228 240 Volts

0.14 0.16 0.20 0.33 0.36 0.40 0.44 0.48 Ohms

Automatic line voltage compensation.

Typical line current for different conditions of use are as follows (tolerances are in the range of +/ 20%).

Currents listed below are for the basic generator unit equipped with two TV monitors, one memory and a

video imager.

Line current

A) For 208 V, 50 or 60 Hz with a line resistance of 0.36 Ohm (6% line regulation) 20 Atype TT fuses (slow blow)


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C) For 100V and 108V 25 A fuses Type TT (slow blow)

The earth leakage current, is in accordance with standard IEC 60127, (class 1, type B).

In the US, earth leakage current complies with 60 NFPA requirements.

Limits of utilization see 5.4.2

Note : Fuses of a rating higher than recommanded above may be required in some countries.

The unit is furnished with a power cable of adequate length.The replacement of this cable by a longer cable may produce a non compliance

with standard and increase the earth leakage current.

The use of an extension cable is not recommended : if one must be provisionally

used, the section of wires be 2.5 mm2minimum and an earth ground wire is

mandatory.

The specified impedance line correspond to the end of the extension cable (female

plug).

Protection fuses

All protection fuses are only accessible by service engineer. See Service manual.

CAUTION


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5.2.2 Image intensifier

The power supply is a high stability solid state model.

Single field dual field

Specification 6 Normal 9 Magn 6

Typical conversion factor cd(m)2

mRs150 180

Typical contrast ratio 20/1 21/1 22/1

Input field diameter 15 cm 22 cm 16 cm

Typical central resolution 44 lp/cm 44 lp/cm

51 lp/cm

Builtin grid 90L/inch 90 L/inch

8:1 10:1

Radiation safety fully shielded

Anode voltage 30 kV


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5.2.4 TV monitor

Horizontal scan 525/625 lines (60/50 Hz)

Vertical scan 100/120Hz (50/60Hz)

Interlace 2:1 (50.8 cm)

Image tube 19diagonal

Brightness and contrast controls on rear panel of monitor

Caution :

The video outputsof the unit or options must not be considered as output signals.

It is strictly prohibited to use them for any purposes other that those designed by the manufacturer.

5.2.5 DSM Memory

DSM Processor equipped with storage capacity of 8 (volatile) images or 600 images accordingto option.

Power supply (internally provided).

Processing in 12 bits


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5.3 MAXIMUM DEVIATION DATADEVIATION DATA OF THIS PARAGRAPH ARE PROVIDED FOR COMPLIANCE TO SOME

STANDARDS

Factor Range Deviation Measurements Basis

Rad kVp 4055 kV +/20% Direct kVp measurement is not

55110 kVp +/10% possible. See 5.3.2

Rad mAs 0.16 to 160 mAs +/(10% + 0.2 mAs) mAs meter. See 5.3.2

Fluoro kVp 40 50 kV +/ 20% Direct measurement of kV is not

55110 kVp +/10% possible. See 5.3.2

Fluoro mA 0.16 mA+

/(10% + 0.2 mA) mA meter. See 5.3.2

Fluoro time 4 min.30 +/15 s Stop watch.

In the radiographic mode, all mA values are typical.


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Product of exposure time x current (mAs) : The product of exposure time x current is measured by means of

an mAs meter connected in the secondary circuit of the HV transformer.

A correction must be done to take the high voltage capacitor charge into account (See

service manual).

Fluoro time : the time of a continuous fluoro exposure, between timer reset, until the buzzer switches on.


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5.4 GENERAL RATINGS

5.4.1 Radiographic mAs meter

0.16 0.2 0.25 0.32 0.4 0.5 0.63 0.8 1 1.3 1.6 2 2.5 3.2 4 5 6.3 8

10 13 16 20 25 32 40 50 63 80 100 130 160 mAs.

5.4.2 Radiographic kVp and mA

A. At full power (line voltage as in 5.2.1 )

Nominal power 3 kW (100 kV 30 mA 0,1s)

40 to 110 kVp in steps of 1 kVp.

mA linked to kVp in six steps as follows:

40 to 49 kVp : 60 mA

50 to 59 kVp : 55 mA


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C. Reference current time products (mAs)

4 mAs 70 kV 41 mA 0.0975s

3.2 mAs 100 kV 30 mA 0.1067s

3.2 mAs 110 kV 30 mA 0.1067s

N.B. the loading is determined as the result of the mAs product integration.


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7.0

6.0

5.0

4.0

3.0

2.0

1.0

3.853.9

2.7

2.3

1.4

mA

COURBES kV mAkV mA CURVES

ILLUSTRATION 12


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Limits of utilization with a 100V mains

If the Stenoscop is configured for a 100 Volts power line, the mains circuit breaker may open during

radiography if technique factors above the following are preset :

110 kV 80 mAs

88 kV 100 mAs

70 kV 125 mAs

50 kV 160 mAs

If technique factors higher than above are required, the unit must be connected to a supply voltage of

120V (at reduced radiographic power) or 200220240V, at nominal power.

5.4.3 Fluoroscopy kVp

Manual : 40 to 110 kVp in steps of 1 kVp.

Automatic : Continuously variable between 40 and 110 kVp.

kVp linked to mA according to the curves shown on illustration 12 controlled by the amplitude of the

video level from the TV camera.

The video signal is measured in a circular window having a factoryadjusted diameter.


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Automatic: The mA values are connected to the kVp values according to the curve in illustration 12.

The selection HIGH QUALITYor NORMAL DOSEhas a twofold purpose; it selects the I.I.

entrance dose and switches over the parameters from curve 1 to curve 2.

In the HIGH QUALITYmode, the mA are limited in the same way as in MANUALmode.

When in automatic or manual modes, the technique factors are restricted as shown on the curve 4, if the

temperature limit is reached at.

5.4.5 Fluoroscopic Timer

The fluoro timer is a 05 minute electronic timer with an audible termination signal and reset key.


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0

8

16

24

32

40

48

56

0 1 2 3 4 5 6 7 8 9 10

K Joules

COURBES DECHAUFFEMENT ET DE REFROIDISSEMENT DE LANODE

HEATING AND COOLING CURVES

ILLUSTRATION 13


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5.5 GENERATOR RATING AND DUTY CYCLEillustrations 13 and 14

500W maximum in fluoroscopy, up to maximum tubehead temperature interlock, 150W until bellows

compensation safety.

3.600 mAs per hour at 110 kV maximum allowable rating with 30 sec rest between rad exposures.

Depending on ambient temperature, tubehead position, and sterile drapes, thermal interlock may occur

at this rating.


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ILLUSTRATION 4 ILLUSTRATION 5


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1.3 TV MONITORS AND MOBILE CART

(See Caution2.2)

illustrations 4 and 5

The TV monitors are mounted on the mobile cart.

1 XRay emission control lamp.

2 DSM image processor.

3 Hand held infrared remote control secured on the unit (on a magnetic slide).

4 Infrared detector.

5 Alphanumeric keyboard (DSM controls).

6 VTR (option).

7 Video imager (option).

8 Video imager (paper) (option).

9 ON/OFFpower switch (on the rear side of the mobile cart).


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CHAPTER 1 X-RAY TUBE HD281

SECTION 1

DESCRIPTION

11 General

The HD281 x-ray tube is fitted with xray tube head for Stenoscop II.


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13 Dimensions

Reference axis


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SECTION 2

CURVES CHARTS

21 Electron emission curves

Focal spot :0.5 Voltage

Ano

de

inpu

tintens

ity

mAV


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22 Single load rating

Focal spot : 0.5 Voltage

Exposure time

Watts


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23 Modulation transfer function

These curves show typical performances.

To get minimum values (according to IEC Standard 336/1982), multiply the frequency by

0.9 (width) or 0.85 (length).

Standard magnification : 2

Focal spot : 0.5

.2

.4

.8

1

.6

F.T.M.

Width


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To get minimum values (according to IEC standard 336/1982), multiply the frequency by

0.95 (width and length).Standard magnification : 1.3

Focal spot : 1.8

21

.2

.4

.8

1

0

.6

53 4

F.T.M.

Spatial frequency (lp/mm)

Width


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24 Anode Heating and cooling curves

k joules


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ILLUSTRATION 1


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Please note the original version of this manual was written in French.

1. DESCRIPTION

1.1 MECHANICAL STRUCTURE

see illustration 1

1 Xray head assembly

Comprises the Xray tube, the high frequency Xray generator, a motorized collimator and a patientguard of clear plastic.

2 Carm orbital movement brake.

3 Carm slide handles.

4 Carm rotation brake

5 Horizontal movement brake.

6 Wigwag movement brake

Note: THIS APLLIES TO ALL BRAKES.

To brake, push the brake handles forward ( toward the CArm); to release, draw the brake handles


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Position A

13 Rear wheels locking footswitch : see illustration 2

Position A. Rear wheel brakes locked.

Position B. Rear wheels moving freely.

Position C. Rear wheels locked for lateral movement.

Also turn steering handle (8) 90o.

14 Interconnecting cable between mobile unit and monitor cart, wound on its support. The plug fits on a

hook under the cable support.

15 Rad Fluoroscopy handswitch.

ILLUSTRATION 2

ILLUSTRATION 3


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Stenoscop

A

D

B

1

2

3 315

44 4

5

6

7

8

9

10

14

2

22

23

24

21

20

ILLUSTRATION 3


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1.2 CONTROL CONSOLE

illustration 3 back of manual

The controls are ordered logically as follows :

A) Fluoro and Rad controls (these controls are repeated on both sides of the unit) and

C ARMUP/DOWN motion.

Footswitch and handswitch located on the right hand side of the unit can also be used.

B) Image system (collimator, camera, TV monitors).C) Modes of operation and Xray parameter selection

D) Fluoro timer and Xray elapsed time totalizator

For detailed description of the controls, see following pages

1.2.1 FLUORO AND RAD CONTROLS

illustration 3

(1) Xray exposure control .

Fluoroscopy is initiated by pressing this key when a fluoro mode has been selected.

A di hi i i iti t d b i thi k h th di hi d h b


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1.2.2 MONITOR AND COLLIMATOR

illustration 3

Note on collimator operation.

In the radiographic mode, the Xray field is limited by a round aperture of either 9.5or 30 cm, dependingon local regulations.

In the fluoroscopic mode, the XRay field is limited by a round aperture of a size corresponding to the fieldof the image intensifier.

Two pairs of rotatable and separately adjustable shutters, one of them semitransparent, are provided.These shutters are active both in fluoro and in radiography.

WARNING!

With 16cm image field :

Switching from Fluoro to Rad does not change the position of the collimator shutters but the

keys collimator open(22 and 23) start blinking to warn the user.

Touching these commands will open the collimator immediately to the full cassette size and thekeys light up permanently.

With 22cm image field :


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1.2.3 MODES OF OPERATION AND XRAY PARAMETER SELECTION

illustration 3Modes of operation

9 Standard radiography

10 Singlepulse fluoroscopy .

Only one XRay pulse is generated, the duration of which is controlled by the acquisition timeand image processing of the memory.

11 High quality FLUOROSCOPY.

This operating mode can be used simultaneously with modes 10, 12 or 13 for passing fromNORMAL DOSEfluoroscopy to HIGH QUALITY fluoroscopy.This operating mode is active when the push button is lit up.

12 Pulsed fluoroscopy.

13 Standard fluoroscopy.

18 Fluoro manual

Key lit : manual kV/mA selection

Key unlit : automatic kV/mA selection.

When going from automatic to manual fluoro mode, the last kV and mA values in automaticmode are carried over to manual mode.

Xray parameter selection

17 mA or mAs selection : (keys and )


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(See Caution2.2)








6 VTR (option).




TELECOMMANDE DSM

ILLUSTRATION 9


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MODULE 1

TELECOMMANDE DSM

1 2 3

4 5 6

7 8 9

10 11 12

13 14 15

16 17 18

ILLUSTRATION 9


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(See Caution2.2)








6 VTR (option).




ILLUSTRATION 7


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ILLUSTRATION 7


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2. OPERATING INSTRUCTIONS

2.1 TRANSPORT POSITIONSee illustration 7

When moving the unit to or from a room, place the unit in the following position :

Xray axis vertical, with the Image Intensifier up.

Center wigwag movement

Retract the Carm fully toward the console

Bring the Carm to the lowest position (this movement must be accomplished before turning thepower off).

Lock all movements

Turn power off (before disconnecting cables)

Disconnect cables and wind them on their supports

Set rear wheels locking footswich in the free position (pedal horizontal).

WARNING !

This unit weighs approximately 500 lbs.

Care must be used when transporting from one area of use to another. Failure to follow these precautions


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THE MONITOR CARTS OF STENOSCOPS OF THE 6000 AND 9000 SERIES

ARE NOT INTERCHANGEABLE WITH THOSE OF THE STENOSCOP LE.

IN CASE OF INTERCHANGE OF MOBILE CARTS (POSSIBLE IF TWODIFFERENT UNITS WERE ON THE SAME SITE), NO DAMAGE WILL

OCCUR, BUT IT WILL BE IMPOSSIBLE TO SWITCH THE UNIT ON.

Plug mains supply cable no10 (illustration 5) from monitor cart into suitable mains outlet.

Press the power ONswitch on the TV monitor cart (item 9 illustration 5).

The green READY indicator light comes on showing that power is on (item 4 illustration 3).

REMARKS : PREHEATING TIME

When the unit is powered ON, a delay of about 1 minute is required by the memory to execute its boot

sequence.

During this delay, XRay emission is not possible.

The monitors also require a delay of about 1 minute in order to display a workable image.

The video imager preheating delay is about 1 minute during which time making a hard copy is not possible.

A buzzer is actuated at the end of this delay.

WARNING


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Stenoscop

A

D

B

1

2

3 3

15

44 4

5

6

7

8

9

10

14

2

22

23

24

21

20

ILLUSTRATION 3

TELECOMMANDE DSM

ILLUSTRATION 9


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MODULE 1

1 2 3

4 5 6

7 8 9

10 11 12

13 14 15

16 17 18


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2.3 FLUOROSCOPIC MODES OF OPERATION

2.3.1 FLUOROSCOPY WITH AUTOMATIC BRIGHTNESS CONTROL

See illustration 3end of manual

Personnel should wear protective lead aprons and gloves, and should remain, as much aspossible, behind suitably positioned mobile lead protective screens during the examination.

Select fluoro mode (illustration 3 key 13). The key lights up.

Check that the manual fluoro selector is released. (illustration 3 key 18 is off).

Fluoroscopy can be initiated in 3 different ways :

press the fluoroscopy footswitchpress XRay control keys on the control console (illustration 3 key no1)press XRay handswitch.

An orange coloured lamp secured on the monitor cart comes on during XRay emission.

kV and mA are adjusted automatically for consistent image quality.

Releasing the control key interrupts the fluoro sequence. The last image remains on the TV screen.

mA and kV are permanently displayed on the operator console.

The last mA and kV parameters remain displayed when fluoroscopy is interrupted and are retained.

If required, collimate the image by pressing the opaque and semitransparent shutters control(illustration 3 keys 22 and 23), .

ILLUSTRATION 9ILLUSTRATION 10


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2.3.2 FLUOROSCOPY WITH MANUAL kV/mA CONTROL

See illustration 3

Select the fluoro mode of operation (illustration 3 key 13); the key lights up.

Press MANUAL (illustration 3 key 18); the key lights up

Reset fluoro timer (illustration 3 key 6) to zero.

Select kV (illustration 3 key 15). kV is displayed on the console.

Select mA illustration 3 (key 17). mA is displayed on the console.

Start fluoroscopy with key no1, with footswitch or with handswitch and adjust kV and mA to

obtain the best image. Follow the procedure outlined in the previous paragraph for the rest of the operation.

To return to the automatic brightness control mode, again press the manual selector key.

In manual mode, the cameras automatic gain control does not operate.

The manual mode may thus not be appropriate to view very large objects with heavy Xrayattenuation.


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2.4 RAD

BEFORE USING THE STENOSCOP IN THE RADIOGRAPHIC MODE OF

OPERATION, THE OPERATOR SHOULD VERIFY :

1. That the cassette holder be correctly attached.

2. That there is a film present in the cassette, appropriate to the intended use.

3. That the cassette be appropriate to the intended use and inserted into the

cassette holder before the exposure.

See illustration 3

Fix the cassette holder to the face plate of the image intensifier (with or without grid).

See illustration 8.

Introduce a cassette with film in the cassette holder.

Select the RAD mode of operation illustration 3 key 9.

The mAS display lights up.

Select kV (illustration 3 key 15).

Select mAs (illustration 3 key 17).

Open the collimator shutters completely by pressing the flashing keys (illustration 3 keys 22

WARNING


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ILLUSTRATION 3


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Stenoscop

A

D

B

1

2

3 3

15

44 4

5

6

7

8

9

10

14

2

22

23

24

21

20


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Group 1

TELECOMMANDE DSM

ILLUSTRATION 9


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MODULE 1

1 2 3

4 5 6

7 8 9

10 11 12

13 14 15

16 17 18


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Doubler

Doubler

H. V.Transformer

FromConverterModule 4

6A1

MA / MASMEASURING CKT

Measured mA (FL)

Measured mA G(Rad)

6A11000 / 1

Divider KvMeasuring

Ckt

Measurto 3A

LS SS

Rad (+)


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Op 55, G32,G33

3A3PRX

3A19SEXP

Arc Det Op46Monostable G32,

G30 ,CounterG31

OSC G79

Integrator Op 97

3A19PRI

3A19OX 3A19

(Shuts downConverter

after 4

arcs)

Indicates

shutdown

Compare

Op114Op102Op122

CompareAdder

3A19DemxOp132

C137

Op1806A1

MeasuredKv

3A9 Selected Kv/20

3A19Clock

FL Timer

CR4

a5 3A19TROU CLQ

INT4 CLQ

KV* = ( KV 1 ) 1.120 20

Op114Select KV/20

KV Error


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PRX PRX

PR1

DEMX


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G112, 116,118 Logic

G118, 113, 117, 115 Logic

G119, 120 Logic

3A12 DEMX

SEXP

PRI

3A12 TROU CLQ

G216, G113,Q189, Q178

3A26 +12V & SX

To Q181, Q259, Q303, Q238

Xray Button BPCL

FS

Rad

(3A12) 120 Kv

(3A12) INT4 CLQ

(3A26) Stop MAS

Sec Bellows

G121A

Q

Q_

Clock

G128555 Clock Timer

BistableFlipFlopG114, G117G115, G155

SEXP 3A12, 3A5, 3A3

PRE 3A26

SYXSC 3A26

Closed if

memory

interface

is not used.

S76A

Q238Q235

MSI XR 0354

Rad

Clock

Q303

Q256

Q300

Q259

G122D

G122AQ281Q278

TR313

TR269

TR291

To converter4CR7 (Preset C3 & C4)

TR248

To converter 4CR4 (Select all capacitors in (Rad)

To converter 4CR6 Main SCR

To converter 4CR1 Main SCR

OX

Signal through memory Interface


132/1171

120kV

PRE SYX SC


133/1171


134/1171

PRI

GR RAD


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Sample & HoldA71 , 82

RX(From TVcamera) KV/20 Aut

(To 3A7)

Integrator A73

A74B

A121Comparators

R67Threshold

Ref. R65

Counters G143, 144

158, 159, 160, 161

(3A12) PRX CP

(50 Hz)

Decoders G184,

185, 186, 187

GainR66

+V

+ V

DisplaysDS 15 (.01)DS 16 (.1)DS 17 (1.0)DS 18 (10.0)


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Logic Ckts& Latch

G70

UpdownControls

G48, 31

Latch G69F L

1KHzOJC G148(3A19)

OX 4 bit comparatorsG108, 126

SC

Latch G97RadSC

Clock

Clock

UpdownCountersG138, 125

Auto= closedSm49

Sm31, 32Kv(Updown)

To 3A9

WR

G90

A / D

300 KHzTo G150

AnalogKV/2

from 3A5& TV Camera

3Hz & 30 HzOSC &

2Sec delay

(3A9) 40110KvLimits

SC(3A9)

A>B A>B

(3A5)

Hold Kv


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PL1 PL1 +5V

+5V


139/1171

45A

+5V Sm26

Sm33

Sm35

Pulsed FL

HLC

ER

Rad Gr SC

G150

Reset

Clock

Inhibit

300 kHz from G90

161310

2

4

7

3

8 15

14

+5V

+

+12V

+12V

G137 A to F

+12V

GR

3A3, 3

ER


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141/1171

G21G20Lim.110

G18G19Lim.40

FC110

3A7

Logic CktsFC40

Comparators

3A9 CONSIGNE kV / mA

G68DAC

EPROM

Dis.kV

G67

REFERENCE VOLT.kV/20

G138G172

G22

BCD to DECIMAL DECODER

U

D

C

BCD to 7 Segm. DECODER

REFERENCE VOLT.mA Rad

2A1MODULE

G

888

kV

3A12kV/mA

3A26

+5vSm35

Logic CktsG122, Q141

To Module 8TVCamera aperture

3A26 FILG94

DAC

EPROM COUNTER

REFERENCE VOLT.

mA FL

G120 G136G137

EPROM

2A1MODULE

S140B


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143/1171


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KV/MA TapesQ108, 110

AdderA152

A284Amp

A138Integrator

(Reduced Power)

RP

Integ. GainQ83, Q217

3A12Measured MA(Rad)

3A9KV/MAfrom G22

S133B

0= .16 to 5mAs1= 5 to 160 mAs

3A9

3A9mAs Ret

A180Compare

G188,

184,187

AmpA214

3A19Stop mAs

Fil.Ret

Q287A 85%KV

& PRE

Pre heatQ216 (Rad)

Safety Delay (Rad)

Q193, 194, 197,G184 187

Pre

RP

3A3 Powerreduction(Closed)


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SYX SC


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G155180 HzOSC

Q206

SelectorLogic

G182,183Q124

Pre amp & AmpQ176, 129,162, 122

Rad

FLIntegrator

A234,Q265Q266

CompareA237 Fil Ref

(A214)

RMS

Low PassFilter A282& Multiplier

A278

n2 FL/RadSelectorQ213 A & B

LimitersQ125, 128Q123, 121

Current

Sense

DriversQ21, 20,

15, 11

VoltageSource

5TR1, 5CR3,C3 & C4

To Xrayhead

Fil. Trans.

5A1

n

C3

+V

VoltageSource5TR15CR3

+

C4

Q20

RadRad


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Rad

2Hz OSCG35(3A5) PRXCP

Timer Display


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G6950HzOSC

CountersG38, 37

LogicCktsG36

457(3A19)

Stop ConvtSCRSR217

PRX

G35

Sm14

426LED FLASH

LogicCkts

G74,75DS175Buzzer

RAD

G39

PRX

Sm26

Sm 7

BPCL(3A19)

TimerReset

Module G2A1

XrayExposure

3A12


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PRX

457

PRX


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Q218Q211

Q249Q241

7M3

7M2

Opaque

Collimators

SemitransparentCollimators

7M5Q189Q190

Circular Coll9TubeonlyRad

G180, 163181, 179,

164, 166, 158Logic Ckts

G168, 157,169,

160, 159,

164, 156Logic Ckts

FC Sc1

Rad

FC GR1

(Close)Sm15

Sm16 (Open)

7M1 CollimatorRotation

Sm11 (CCW)

Sm12 (CW)

12V

+12V

(Close)Sm14

(Open)Sm13

FC GR2


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Maximum opening limit switches are not actuated, FC SC1 (Fluoro) FCGR1 (Rad) console settings are com-

patible with operating mode selected (Fluoro or Rad).

DelayLogic Ckts

(3A7)Auto

(3A7)ER

Q145

Module 8 TV Camera

Auto Gain Control (CAG)


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DelayLogic CktsG161, 162,170, 171

(3A7)ER

(3A5)Sexp

(3A7)F110

R239C235

Syx Sc(3A19)

Q148

Q512G166

S133D

G166

S133C

Video Blank

Beam (Max)

+24v

Q149Zoom (Mag mode)

Zoom Z1

Q132

S133A


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F110

Syx Sc

Syx Sc

REV 1


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Mod D (2A3) 3A5

Sm22Sm23

Sm5Sm9

3A7Mod G (2A1)

Logic CktsG16, Q17

Q25, Q30

DriversQ28

Q33

K34

K44

1A1 Board

Trans5TR1

K6

Power

K34, K44PolarityReverse

1M1Up/Down

Drive Motor

REV 1


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REV 1

Q195


157/1171

Q

Q

G140DQ55

G140EQ57

G106

+24V

+24VQ194G140F

Q195G140A

Sm10

Sm9

H Sweep24

23V Sweep

To Module 8TV Camera

G163BQ151

G163C

Q156

Sm8

Sm7

12V

12V

Monitor 1

9A1

K7

K5

REV 1


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REV 1


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REV 1


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REV 1

TP2


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VRI +18V24V.

R1

AGC DelayMNI

R9

AGC (On/Off)

To Camera Video Amp

GI

VR2

+24V 15V

+10V

DS3

G3

G3

NOR R2

MAG R3MAI G3

CR3To image tube

15V

TP2

TP7

TP9

TP8

TP3TP4

REV 1


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Power Supply (PL1)

REV 1

TP1 ImV=InA TP4


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Q1,2,3 & 4Q5, 6, 7MA11,2

MX11,2,3

NewviconTargetSignal

R1Black Level

Adjust.

Q8

S4Black

Window

Hclamp

To Sync & Mask PL3RX(Auto Brightness)

R2 Max Gain

MA3, 4Q9, 10, 11, 12 Q17, 18, 19

TP11

CompBlanking

CompSync

Q16

Q20

CompositeVideoto Memory DSM& Monitors

250 mVB/W

R7

Video BlkLevel (Setup)

REV 1

PreAmp and Video Board (PL2)


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165/1171

REV 1


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REV 1

MA11 MA21, 2MX21, 2, 3

Vsweep(Defl)

VD

R5 Vcent NOR


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R2 Vcent Rev

R1V size

Q6 ,Q7 Cathode(Newvicon)

VD

Q5 TRIHD

R6H size R7 H Lin

R9

H centNOR

K1

R8 H centRev

H sweep(Defl)

,

HD


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+24V


169/1171

IRIS SIGFrom3A9

Std FL

HLC

P1

P2

B3

X

B2B1

+

B1+

B2

M+

IRIS

63 mm(Max open)

Servo

Position

+V

MSI XR 0374


170/1171

(Sync separator)


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U4 U3U2 U1Q1 Q2

H

V

(Sync)

Q3,4,5

Q6

C17

VideoIn

Q1 0Q7, 8

Diff. Amp Follower

Q11

Q9R29 Gain

Blk LevelClamp

Remotecontrast


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173/1171

OSCPLLU101, U102

HSync

R110

+V PhaseDelay

+V

R113H hold

Q101 Pre Amp T101Q104 Output Amp

T102 & RegU105, U104,

U106

+Video150V.+6V.+5V.

5V.

L 102 Lin

H Defl

B+Boost V.


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175/1171


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+V

Q302+300V


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Q302

C309

C304

CR304

To CRT(FOCUS GRID)

+V

+V

DC Focus

150 V

To CRT

(G2)

R321

R323Q301

Cornerfocus

V

Parabola

C307CR308

R310

V Focus

C302 & C303

+V

T301

G2Adj.

L103Width

R311H Focus


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LCT2


179/1171

Filter

HV Supply

(sealed)Nonserviceab

CR9

220VAC

U1Switcher Q1 &2R11 U2

CR1

CR8

R5&6

T1

C13


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181/1171


182/1171


183/1171

Shutter

Mirror

Film cassette

Lens

Mirror

Photo Cell

Mirror

CRT


184/1171

CRT

Photo cell


185/1171

D / A

p

CRT

Monitor

Contrast, blanking& brightness

CompareA/D

Mux

Integratorlight sensor

board

Photo cell

OMemory


186/1171

Video Amp.

Comp VideoUnblanking

C t t

Comp Video & Blanking


187/1171

SmoothingBoard

Contrast

V. Defl

Comp Sync

V Sweep

H Defl. Coil

H Defl

V Defl. Coil

PLL Sync

H Sync

XSync

CRT Board

H Scan &

Blanking

V Scan &

Blanking

Brightness

H. V. PowerSupply

CRTFilament

+750V.

Brightness

Scan & DYN Focus

Output Board CRT

150 & +750v


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62 CORRECTIVE MAINTENANCE

621 OPERATING PRECAUTIONS

6211 XRAY PROTECTION

During an operation involving Xray emission, put a lead apron between the Xray head and the image intensi-

fier of the mobile system


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fier of the mobile system.

6212 DIFFERENTIAL ELECTRICAL MEASUREMENTS

Differential electrical measurements taken with the oscilloscope (in particular, thyristor trigger voltages) must

be taken with the oscilloscope in differential mode.

Measurements taken in common mode with an earthed oscilloscope may destroy components.

6213 CONNECTOR PL1 OF PWB 3A19 COMMANDE SCR

Never remove this connector while the mobile system is energized.

The thyristor trigger protection currents are on PWB 3A19 and there is a risk of accidental triggering if PL1 is

disconnected.

6214 GROUNDING OF BOARDS ON EXTENDERS

Dont forget to ground the boards (with an extension lead with FASTON terminals).

6215 BOARD REPLACEMENT

6223 READILY INTERCHANGEABLE BOARDS

1A1 MOTEUR ARCEAU PWB (Carm motor)

2A1 MODULE G2 (control console) PWB

Switches position: see adjustment sheet RG40

2A3 MODULE D2 (control console) PWB


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3A3 DIAPHRAGMES 2 (collimator) PWB


3A7 AD/kV PWB

Check the presence of bridge W10

3A9 CONSIGNE kV/mA2 (kV/mA reference) PWB


Check the presence of W245 bridge

CAUTION : EPROM

Check agreement: name, position, revision

3A12 kV/mA PWBAdjustment of kV measurement: may have to be corrected (see adjustment sheet RG10)


6224 INTERCHANGEABLE BOARDS WHICH REQUIRE ADJUSTMENTS

3A5 Timer PWB (Minuterie 2.)

Adjustment of ABC video (adjustment sheet RG 20).


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3A26 Filament heating PWB (Chauffage filament 4)


Adjustment of fluoro mA (adjustment sheet RG 12)

Adjustment of fluoro preheating (adjustment sheet RG 13)

Adjustment of RAD preheating (adjustment sheet RG 16)

623 FUSES REPLACEMENT

The unit is internally protected by fuses inaccessible by the user.

During corrective procedure, it is OBLIGATORY to replace a blowed fuse by means of the SAME MODEL

OF FUSE.

A plastic bag with spare fuses is provided in the unit in the module 3. See D/R n 01 sheet for access.

This bag countains :


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This bag countains :

2 Fuses ABC 1A 250V code 854 352 P 025

1 Fuse ABC 3A 250V code 854 352 P 045

1 Fuse ABC 5A 250V code 854 352 P 055

1 Fuse ABC 8A 250V code 854 352 P 075

1 Fuse MDA 3A 250V code 854 352 P 425

1 Fuse FNQ 1A 500V code 854 362 P 315

It is possible to order this Maintenance bagwith the code number 828 731 G 015.

6231 FUSES LIST

NAME MODEL LOCALIZATION ACCES

1A1F5 MDA 3A 250V UNIT see sheet

1A1F8 ABC 3A 250V MODULE 1 D/R 025F2 ABC 3A 250V UNIT see sheet

63 DISASSEMBLY/REASSEMBLY SHEETS

631 GENERAL

There are two categories of disassembly/reassembly sheets : mechanical (numbered from 1) and electronic

(num bered from 20).Each sheet gives the list of tools and equipment needed, preliminary precautions and part disassembly and

reas sembly procedure.

Th b f h h d i d i hi h i i h 9 R l P


200/1171

The part numbers of the hardware mentioned in this chapter are given in chapter 9, Renewal Parts.

632 LIST OF DISASSEMBLY/REASSEMBLY SHEETS

6321 MECHANICAL PARTS

Sheet TitleNo.

01 Disassembly/Reassembly of mobile system front cover

02 Disassembly/Reassembly of mobile system rear cover

03 Disassembly/Reassembly of Xray head upper cover

04 Disassembly/Reassembly of steering handle

05 Control console opening procedure

06 Disassembly/Reassembly of guide cable

07 Disassembly/Reassembly of gas spring

08 Releasing the inverter and the board rack

09 Disassembly/Reassembly of Monitors support rear covers

Version No.: 00

STENOSCOP 2 Series 6000 and 9000Job Card RG 40 1 of 2

Purpose: PWB SWITCHES PROGRAMMATION.

Date: May 1993

Time: Manpower:


201/1171

Noet Nom du CI Switch No Switch Position FONCTION

EUR. USA

2A1PUPITRE MODULE G2

828 986 G015

S58 14 (A)23 (B)S59 14 (A)

23 (B)S60 14 (A)

23 (B)

ONON

ON

OFF

OFF

OFF

ONON

ON

OFF

OFF

OFF

The 3 switches determine the function of BP 2A1 Sm 35Stenoscop 2 (D6/D9)

HIGH QUALITYor STANDARD FLUOROmode

selection

Stenoscop LE

BLOCKING OF MEMORIZATION ( DR )

2A2PUPITRE MODULE D2

828 984 G025

S52814 (A)23 (B)

OFF

OFF

OFF

OFF

ON = Possibility of camera sweeps inversions

OFF= No possibility of camera sweeps inversions

3A1INTERFACE DSM

S50214 (A)

2 3 (B)

ON

OFF

ON

ON

ON = RX Hold in SP and ER mode ( SN )OFF= No RX Hold in SP and ER mode ( SN )

ON N RX H ld i SN d


202/1171


203/1171


204/1171


205/1171

Job Card RG 21 2 of 3

4.3 T3 DELAY CHECK

Connect the scope to 3A1.E122


206/1171

Sweep 10 ms/div

On 3A1 connector, connect 3A1.a8 to a20

Select NORMAL FLUORO MODE

Initiate FLUORO and release RX control

T3 Delay is triggered by the falling edge of the RX control.

Verify that the delay is 62 + /8 ms

4.4 T4 DELAY ADJUSTMENT

Connect the probe to 3A1.E126

Sweep 0.2 s/div

Select PULSED FLUORO on the control console.

Initiate FLUORO sequence.Delay T4 is generated after the first RX pulse.


207/1171

Job Card RG 21 3 of 3

4.6 PULSED FLUORO RATE ADJUSTMENT : T6



208/1171

Select PULSED FLUORO MODE

Initiate FLUORO sequence

Adjust 3A1.R150 in order to obtain a delay T6 of 1000 +/50 ms.

With T4 = 500 ms, the pulse rate is 1 Xray pulse / 1,5 second.

Remove connection between 3A1.a8.a20.

4.7. ANODE COOLING PAUSE SAFETY ADJUSTMENT (not used)

This adjusment is valid only for the PWB INTERFACE DSM.

Code number 828 988 G 035


S 0 5 S /Di


209/1171

(with flat field)


210/1171

KVP

mA & mAs

Q


211/1171


212/1171


213/1171


214/1171

3A7

Module G(2A1)

Sm35

+5VHigh LevelFL (HLC)

b21

b6

b333A9

TVCamera

Lens

Aperture

14

3A19

a6OX

b28b29

3A3

OXHLC

b20


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216/1171

Sm 33

Module G (2A1)

3A7

TV Camera

ElectronicRad b31 b29 a32

3A9

AGCONAUTO+ER F110

3A1

a31MemoryInterface

MemoryDisplay

DSM

3A9

FL Eproms

+5V


217/1171


218/1171


219/1171


220/1171


221/1171


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6652 LIST OF THE ABBREVIATIONS USED IN THE SCHEMATICS

ABBREVIATIONS PWB NAME COMMENTS

LOCALISATION

AUTO 3A751A Automatic FLUORO mode selection

BP01 3A13112B Upper blades of collimator : opening control

BP02 3A13112B Lower blades of collimator : opening control

BPF1 3A13112B Upper blades of collimator : closing control

BPF2 3A13112C Lower blades of collimator : closing control

BPmA(s) Up 3A1766C mA or mAs selection : increase control


243/1171

p

BPmA(s) Down 3A766C mA or mAs selection : diminution control

BP OFF 3A3116D Unit switching OFF Pushbutton

BPCL 2A1102B Request of XRay emission Fluoro and RAD

2A3102C

BUS kV/20 3A760C 8 bits coded information of kV/20 value

CAG ON/OFF 3A3119A Gain automatic control switching

CAPA PREPO 3A1935C Prepositioning of converter capacitors (C3/C4 discharge con-

trol)

Consigne mAs 3A778E Analog signal of mAs reference for RAD exposure

FC40 3A991A Minimum kV value (40 kV)

FC110 3A991A Maximum kV value

FL 3A766C FLUORO mode selection

Fmax 3A1931D Maximum frequence operation of the converter. Not used

FS 31B XRay request from foot switch

GR 3A766B RAD mode selection

HLC 2A171A High definition fluoro selectionHLC does not refer to Hi level

controloperation above 5 or 10 R/min. In both Hi definition

and low dose operation, the entrance exposure rate remains

below 10R/min.


244/1171

Hold kV 3A1201E Latching of the kV regulation loop after T1 delay (delay of

automatism kV stabilization)

INT 4 CLQ 3A1228B Exposure interruption after 4 VHV leakages

kV C0 3A757C Counter locking when kV bus is at 0

kV 85% 3A1228C Signal generated when kV reach 85% of selected kV value.

kV 120 3A1228C Safety : stops the converter if kV value is 120 kV

kV/20 Auto 3A545D kV reference in automatic Fluoro mode

kV composite 3A1223D Actual kV value (VA + VC)

Mesure mA Sc 3A1220C FLUORO mA measure (1 mA = 1V)


245/1171

INTERFACE DSM 3A1 828988 G 035

ACP 201C Anode Cooling Pause : generate a delay between exposures in

ER mode selection if SW602.B is in ON position

HYST 45C not used

MCH 202B Mode change : signal generated during the switching of anoperating mode to an other

ON REST + MCH 203B Reset of the monostable when the unit is switching ON or

during an operating mode switching

OX* 204C RX emission order generated through the adaptation operating


246/1171

logic network

OX* R1 204D Signal delayed according to the rising edge of the OX* signal

butsynchronous with the falling edge of OX*

OX* R2 204D Signal synchronous with the rising edge of the OX* signal but

delayed according to the falling edge of OX*

RAZ ROTATION 206D Rotation to the start position of the monitor rotation coils

when mode A/B is selected in the memory

SN 203F NORMAL FLUORO MODE selection generated by default of

other mode selections

666 USE OF THE SCHEMATICS

The schematics are in flow chart form.

As much as possible, the relation between control and action has been respected.

Each signal is indexed and addressed in the schematics.

Example : SEXP signal

The SEXP signal is generated on PWB 3A19 commande SCR2 output a18 schematic

reference 35B.


247/1171

The signal is used on PWB 3A12input a14

3A5input b83A3

input a17

The index of the signal is marked in front of the use terminal.

3A12.a14 21B

In front of 3A12.a14 terminal, SEXP signal has the index of the terminal where the signal is

generated : 3A19.a1835B

The wiring between terminal is respected and so permits an easier localization of

interconnection default.


248/1171


249/1171


250/1171


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674 OPERATION OF THE kV/mA PWB 3A12 (DIAGRAM 2130)

This board has the following main functions :

. HV regulation (very high voltage),

. blow safety,

. differential/common mode conversion of mASc and

mAGr measurement values,

. low voltage divider compensation,

. 05 min. timer.

VHV REGULATION

When selecting the KV data, Op 114.8 (B) supplies a voltage refe-

. This changes the kV20

which will be transmitted to the memo

ry between two thyristor conductions.

OPERATING SAFETY:

Circuit OP114. A permanently compares the output of OP114 B

with the kV20

reference.

In normal operation, the output of amplifier OP114.B must always

be less than the kV reference.


252/1171

W e se ect g t e V data, Op .8 ( ) supp es a vo tage e e

rence kV*20 (consigne kV

20 1)x1.1to the input of compara-

tor Op 122.

The composite KV signal is generated by the measurement of Vc/

Va (cathode/anode) at the input of Op 180.

The output in common mode of the Op 180 is linked to potentio-

meter R216, adjusted by the latter (KV regulation), is transmitted to

the input of Op 122.

. The signal kV*20

and KV composite being different, the signal

DEM X permits the oscillator to operate

20If a fault in the regulation circuit causes the opposite to occur com-

parator OP114.A flips and blocks OP114 B, i.e. DEM X.

LEAKAGE SAFETY :

The output of OP180 is input to OP46, which detects a sudden

VHV variation. The output of OP46 then triggers monostable G32.

The output of G32 sends signal TROU CLQused by the hystere-

sis safety of SCR PWB 3A19 and SCR control.

Counter G31 counts to 4 VHV leakages and then sends the INT

4CLQ signal, used to shutdown the inverter by SCR PWB 3A19.

675 OPERATION OF SCR CONTROL PWB 3A19 (DIAGRAM 3135, 3640)

This PWB performs the following functions :

. preset of inverter capacitance 4C3,

. generation and synchronization of the control pulses of main

thyristors 4CR6 and 4CR1,

. selection of auxiliary condensators,

. control the status of the 12 V safety PWB,

. control the stop signals(temperature, VHV leakages, mAs refe

rence reached),

. current detection in main thyristors 4CR1 and 4CR6,

. generation of SEXP, PRE, SYX GR and SYX SC commands

for regulation PWBs 3A5, 3A12 and3A26,

. generation of clock (CLOCK)of the inverter,

. generation of signal fmax(not used),

hysteresis safety of HV transformer

SELECTION OF AUXILIARY CAPACITORS (4C1 AND4C4) :

When a radiography is requested, signal GR from PWB 3A7 is

converted into signal RAD which is then applied to amplifier

(Q300) and isolating transformer TR313 of the trigger of inverter

thyristor 4CR4.

PWB 12V SAFETY

A +12 V continuity line crosses the PWBs in the mobile system,

thus checking the voltage and making sure that the PWBs are pro-

perly plugged in. The feedback from this line is input into a safety

circuit (Q189,Q178) where it is checked. If the feedback is incor-

rect, a lock command is sent to the all driver amplifiers of the isola-


253/1171

. hysteresis safety of HV transformer.

PRESET OF INVERTER CAPACITOR 4C3 :

Logic circuit OX (G116A) generates command OX using the

following signals:

. BPCI, generated by the Xray PB on the control console,

. FS, generated by the footswitch,

. RAD, generated by GR on PWB 3A7 when radiography

mode is selected.

Command OX is sent to memory interface PWB 3A1 (in memory

ting transformers (TR248TR313TR269TR291).

The lock command of the drivers operates also if :

SX signal is not present : signal generated by BPCL or FSPOWER SUPPLY (+12V) voltage is lower than 6,2V

(Q185D180)

CONTROL OF THE STOP SIGNALS

The signals should be as follows:

. SEC BELLOW = 1 (if the Xray housing temperature is less than

70oC),

. STOP mAs = 1 (switches to 0 when the mAs reference on the

control console is reached.INT 4CLQ 1 ( i h 0 h f i VHV l k


254/1171

676 OPERATION OF TIMER PWB 3A5 (MINUTERIE) (DIAGRAM 4150)

TIMER DISPLAY

The reference clock signal PRX CP is supplied by kV/mA PWB

3A12.The 50 Hz frequency is at first divided by 50 (counters G143 and

G144), which gives a 1 Hz signal, input to 4bit counter G158.

The output of counter G158 is decoded by G184 to supply the

7segments display DS15. This is how seconds are displayed.

ABC HYSTERESIS OR AUTO KV/20 REFERENCE

. The purpose of this ABC hysteresis is to make an AUTO kV20

refe-

rence by using the RX control signal output from the TV camera in

order to use the correct kV to obtain an optimum TV image.

. The RX control signal output from the TV camera is connected to

the + input of A82 comparator. The input of A82 is connected

to potentiometer R65 (video image reference).

. The output of A82, i.e. RX is connected to A74B through R66potentiometer (system gain) and after to an integrator circuit A73


255/1171

After 10 seconds, G158 sends a pulse to G159, counting tenths of

seconds. G159 counts to 6 (corresponding to 1 minute) and sends

a pulse to G160, which totalizes minutes.After 10 minutes, G161 receives a pulse from G160, and totalizes

tens of minutes.

Zero reset is by pressing key Sm19 of the mobile system control

console. This generates an active signal to the RESET inputs of the

counters.

potentiometer (system gain) and after to an integrator circuit A73,

C72 and R60.

. A74.B does not permit the RX to pass unless it greater or lowerthan a threshold determined by the hysteresis R67. A121 BC

. When RX control signal is not present, the system is calculated to

provide a kV20

reference equal to 2V (= 40 kV reference).


256/1171

678 OPERATION OF 3A7 PWB AD/kV (DIAGRAM 6170)

MODE OF OPERATION SELECTION

The basic circuit providing this operation is G150 : counter CMOS

4017B.When power is switching ON, the RC network (C119R117) hold

counter outputs in Reset state : output 0(pin 3) to 1 logic other

outputs to 0 (outputs 1 to 9).

This counter position corresponds to FLUORO mode selection.

Pin 13 of G150 (CLOCK INHIBIT) is held to 1 logic through R80

d i hibit th ti

Output counter supplies LED corresponding to the pressed BP

through G 139 (A to F) and provides selection informations though

G 137 (A to F) to the unit.

The 300 kHz clock needed for G150 to operate is taken from ADC

converter G90 on the same board.

The following signals are output from the board :

. ER, SP to the memory interface board if present,


257/1171

and inhibits the counting sequence.

When a PB selection mode is pressed, logic state of G150 output(0V) is applied through the PB on pin 13 of the counter (CLOCK

INHIBIT).

This 0V logic state permits the counting sequence : clock pulses on

pin 14 generates counter evolution until the output corresponding

to the pressed BP rises to 1 logic state : clock INHIBITS input rises

to 1 and so inhibits count : the counter is locked on this position

until an other PB is pressed.

. BP mA(s) UP, BP mA(s) DOWN, to the kV/mA reference PWB

3A9,

. GR to the SCR control PWB 3A19.

1.2 Hz and 12 Hz clock (Clock 1 Clock 2)

These two clocks are for the operation of the kV/mA reference

PWB 3A9. They allow mA and mAs references to be incremented

at two different speeds.


258/1171

6710 OPERATION OF FILAMENT 4 HEATING PWB 3A26 (DIAGRAM 8185)

This PWB performs the following functions:

. current regulation in FLUORO mode,

. current regulation in RADIOGRAPHY mode,

. generation of STOP mAs commandwhen the mAs reference is

reached,

. safety in radiography mode 7 an 10 secondes

CURRENT REGULATION IN FLUORO MODE :

The mA Fluoro measurement sent from PWB 3A12 and the mA

Fluoro reference sent from PWB 3A9 are compared by A220.

The Fluoro rate can be adjusted using R9.

added to the above difference, thereby providing the mA radiogra-

phy reference at output A214.

GENERATION OF STOP mAs SIGNAL

Integrator A138 calculates mA x s.Because the mAs reference may vary greatly (0.16 to 160), the

integrator features two integration speeds.

PWB 3A9 splits the mAs reference variation range into two sub

ranges: 0.16 mAs to 5 mAs and 6 mAs to 160 mAs.

The integrator selected by 0 (on a25 connector PWB) comprises

highvalue R6 (100 K) and A138. The integrator selected by 1

i l l R5 (5 K) d A138


259/1171

The Fluoro rate can be adjusted using R9.

The difference between the reference and the measurement passes

from the output of A220 through the lowpass filter comprising

A222 before transmission to the inverter input of A214 by electro-

nic switch Q287.B when signal kV 85% is present.

If command SYX SC sent by SCR PWB 3A19 switches to 0, the

electronic switch Q287.B conducts.

Adjustable potentiometers R3 and R4 are also connected to inverter

output of A214. These potentiometers used to adjust the current

during the preheat phase, i.e. when no reference is present, in

RAD or FLUORO mode.

CURRENT REGULATION IN RADIOGRAPHY MODE

comprises lowvalue R5 (5 K) and A138.

A180 compares the integrator output with the mAs reference sup-

plied by PWB 3A9. When the values are equal, the STOP mAssignal switches to 0 and prevents SCR PWB 3A19 from sending

pulses to the thyristor triggers, i.e. stops the inverter.

RAD SAFETY : 7 AND 10 SECONDS

Two safeties are provided in order to limit the exposure duration in

RAD mode.

The correct safety is selected by 3A3.S133.B : RP power reduc-

tion.


260/1171


261/1171

6713 EXPOSURE PB FLUORO TIMER (DIAGRAM 101110)

EXPOSURE PB

The Xray request is performed by 2 PB : 2A1.Sm7 and

2A3.Sm26.

The PB leds are switched ON by 3A12.G74, 3A7.Q140, R154 andR155.

05 MIN. TIMER

The basic clock signal is supplied by the oscillator G69, adjustable

by R217 to 50 Hz. This signal comprising PRX.CP is directed to

the timer PWB 3A5 to display the timer value, and to the counter

G35 to supply both the LED of key Sm14 (05 min.) and buzzer

DS 175.

G69 is triggered by PRX = 0, i.e. when Xrays are present.

PRX = 0 also triggers monostable G39, validating buzzer operation

after approximately 0.25s.

The 2A1.Sm14 PB resets the timer.

RX LAMP


262/1171

p y ,

assembly (G37, G36, G38) to increment up to the following values

:

. 457, which sends a stop signal to SCR PWB 3A19,

. 426, which validates a 2 Hz flash signal generated by oscillator

The lamp 9DS1 is lighting when XRays are generated in RAD or

FLUORO mode.

Signal PRX causes 3A12 Q625 conduction through G74 wich

energises 9A2 K3

9DS1 is supplied through the contact 13 of 9A2 K3.

6714 OPERATION OF THE COLLIMATOR 3A3 PWB (DIAGRAM 111115)

COLLIMATOR ROTATION

The collimator rotation is ensured by 7M1 motor.

A 12V voltage is applied on 7M1 motor by 2A3 Sm11 for CCWrotation.

A + 12V voltage is applied on 7M1 motor by 2A3Sm12 for CW

rotation.

SHUTTERS OPERATION

The control is ensured by PB 2A3.Sm13 (openingBP02) and

2A3.Sm14 (closing BPF2).

After according, these signals switch the pushpull stage output to

+ 12V or 12V if limit switch are not reached (FCSC2 in FLUO-

RO and FCGR2 in RAD).

These 2 limit switches permit to identify the maximum opening

positions in FLUORO mode and RAD mode.

AUTOMATIC PREPOSITIONNING

When unit is switched from RAD mode to FLUORO Mode the


263/1171

Two possibilities are available :

. Image intensifier 16 cm : 1 field

. Image intensifier 22 cm : 2 fields

16 CM IMAGE INTENSIFIER : 1 FIELD

When unit is provided with a 16 cm I.I, the 7M5 motor is not pre-

sent on the collimator ASM.

On the 3A3 PWB, the switches S501.A and B are open : Z infor-

mation is to 1 logic (112.E G165.A pin 6 to 1 and pin 4 to 0)

When unit is switched from RAD mode to FLUORO Mode, the

shutters of the collimator are automatically positionned in FLUO-

RO mode in order to limit the XRay emission at the FLUOROsize (FCSC1 and FCSC2 actuated).

On the other hand, when unit is switched from FLUORO mode to

RAD mode, the shutters opening must be manually controlled.

The LEDS of the 2 PB 2A3Sm14 and Sm16 are flashing and RAD

opening is completed when LEDS flashing is stopped. (FCGR1

and FCGR2 limit switches reached).

22 CM IMAGE INTENSIFIER : 2 FIELDS

XRAY BEAM LIMITATION

Two limitations are provided :

16 cm controled by 7M4

22 cm controled by 7M5

When unit is mounted with a 16 cm II, only the 16 cm limitation is

present on the collimator.

RAD MODE

FLUORO MODE

16 cm imager

RAD = 0 and RAD = 1 informations control the 7M4 motor : 16

cm field limitation is positionned and limits the XRay beam to the

imager size.

Motor is always supplied in order to maintain the limitation device

in place.

22 cm imager

RAD = 0 and RAD = 1 informations control the 7M4 motor : 22

cm limitation is positionned and limits the Xray beam to the ima-

ger size.

M t i l li d i d t i t i th li it ti d i


264/1171

16 cm or 22 cm imager

RAD = 1 and RAD = 0 informations, after decoding, control the

motion out the field of the XRay beam limitation device : motors

are always supplied in order to maintain the limitation in place.

Motor is always supplied in order to maintain the limitation device

in place.

ZOOM selection : ZOOM selection controls the positionning of the

16 cm limitation with 7M5

6715 OPERATION OF THE COLLIMATOR PWB 3A3 (DIAGRAM 116120)

AUTOMATIC GAIN CONTROL (CAG ON/OFF)

The signal FC110 controls the CAG ON/OFF sequence in the ca-

mera.

The CAG function operates in AUTOMATIC FLUORO mode andin ELECTRONIC RADIOGRAPHY only during the XRay emis-

sion (SEXP = 1) and if maximum kV value limit (FC110=0) is

reached.

The delay, generated by R239, C235, inhibits CAG operation at the

beginning of the VHV regulation.

The switch S133.A locks camera operation in AGC mode.

ZOOM FUNCTION (22 CM IMAGER)

When the ZOOM Function is selected (PB 2A3.Sm17111E) a Z1

signal is generated and select in the camera the ZOOM mode

(mode 1) through 3A3Q148.

SWITCHING OFF SEQUENCE

When the PB 2A3.Sm21 or 2A1.Sm4 is depressed, 1 logic signal is

applied on Q152 base.

Q152 energizes 9A1.K3 (2C)

9A1K3 contact applies 110V on 9Sm1 auxiliary coil : the unit

switches OFF


265/1171

The switch S133.A locks camera operation in AGC mode.

GO TO BLACK VIDEO OPERATION

The 3A3.S133.D permits a blanking of video signal of the camera

without XRay emission (SYX = 1).

BEAM MAX CONTROL

Without Xray emission, the camera is in reduced beammode.

REDUCED POWER SELECTION

When unit is used on a mains voltage of 100, 108 or 120V (USA)

it is necessary to reduce the power : this operation is controlled by

A3.S133.B

OX.HLC

When unit operates in FLUORO and HIGHT DEFINITION (HLC)

mode the OX signal (from 3A19.a16) is validated by SYX Sc and

RAD and generates the 0X.HLC signal.

Th SYX SC i l h ld h HLC l i d i h X R

6716 CARM UP/DOWN MOTION (DIAGRAM 121130)

COLUMN MOTORISATION

The column motorisation is performed by a DC motor 1M1.

The UP motion is controlled by the BP 2A3.Sm23 or 2A1.Sm5

which energises the relay 1A1.K34

The DOWN Motion is controlled by the BP 2A3.Sm22 or

2A1.Sm9 which energises the relay1A1.K41.

A motion request energises the relay K6 through D7 or D4 diode

and supplies the motor.

24 VDC POWER SUPPLY

A 24 VDC power supply is provided to supply the imager (VHV

and TV camera).


266/1171

6717 OPERATION OF 3A5 TIMER PWB (MINUTERIE). (DIAGRAM 131140)

This board performs the following functions :

. monitor coil rotation,

ROTATION OF MONITOR 1 COILS

This function is controlled by keys Sm8 and Sm7 on the control

console.

Pressing these keys generates a logic signal which is amplified by

transistors Q151 and Q156.

These transistors control relays K7 and K5 located on the monitor

cart relay PWB 9A1.

Closing one of these relays causes monitor coils to rotate in the

desired direction.

ROTATION OF MONITOR 2 COILS (OPTIONAL)

This function is identical to rotation of monitor 1 coils and is con-

trolled by keys Sm6 and Sm5.

PWB 3A5 is fitted with the corresponding circuits.


267/1171

1 2 3 4 5 6 7 8

910111213141516

Vcc

GND

C R/C CD +TR TR Q Q

C R/C CD +TR TR Q Q

4538

Dual MONOSTABLE

T = RXX CX


268/1171

VccQ Q C R D S

Q Q C R D S

1 2 3 4 5 6 7

891011121314

GND

4013

Dual D Flip Flop

1

0

Q

1

0X X 0 1 1

CL D R S Q Q

X X 1

00

0

0

1 Hi h l l

1

X 0

0

0

0

0

1

Q

0

0 L l l X D t

1X X 1 1 1

no change

6718 WORKING OF THE INTERFACE BOARD DSM 3A1 (DIAGRAM 201205)

GENERAL

Integrated circuit CMOS 4538

The 4538 circuit includes 2 independent monostables whose time

constants are determined by an external RC circuit

Each monostable can be triggered on the rising or falling dege of a

pulse, according to the input chosen.

SELECTION OF THE MODE OF WORKING

The information of selection of RAD, SP and ER mode condigura-

te the control logic RX and the memory management.

The information NORMAL FLUORO is obtained as a default if no

other mode of working has been selected.

MEMORY SIGNALS

Signals MG+ and MF+


269/1171

outputs 4 and 12 rising edge

inputs 5 and 11 falling edge

Each monostable has 2 outputs :

outputs 6 and 10 generate a positive pulse

outputs 7 and 9 generate a negative pulse

Inputs 3 and 13 reset the monostables.RAZ = logic 0

The signals MG+ and MF+ manage the technique of working ofthe memory (FLUORO, PULSED FLUORO, E.R.).

Signal MEMO +

This signal indicates the end of digitalization or the authorization of

treatment (filtering).

The signal is maintained at 0 logic during the time of establishment

and stabilization of the video signal.

GENERATION OF OX OUT ORDER

The OX order OUT depends on :

the mode of working selected

the signal X.PERM from the memory.

MONOSTABLES5 monostables are present on the PWB 3A1

T1(206AG117B)

This time allows the picture to stabilize in AUTO mode. It can be

adjusted by R151.

It can be shortened by the signal HYST (not active in this version).

of the PULSED FLUORO sequence onwards

It can be shortened by the signal X PERM.

It is not influenced by the release of the order OX, so as to permit

the memory to acquire a correct picture.

PULSED FLUORO CADENCER

T6 (202AQ110A)

The time T6 is generated by a multivibrator type 555. This time

determines the cadences of the RX pulses in PULSED FLUORO

mode.

The multivibrator is triggered at the end of the time T1 and syn-


270/1171

T1 is deleted if the RX control is released.

T2(207AG117.A)

This time is fixed and is used as safety timer of the duration of RX

necessary for processing the picture (16x40 ms = 640 msec).

It is shortened by the signal X PERM from the memory.

T2 is used in ER Mode and during the first impulse in PULSED

FLUORO mode.

T2 is deleted if the RX control is released.

T3 (207B G115 A

chronized by each pulse T4 this makes it possible to have a cons-

tant time between each pulse.

The integrated circuits G119.A and G82.8 (203A) prevent the

emission of an additional impulse when the BP RX is released.

SIGNALS OX AND OX*

The treatment of the signal OX and OS* is prvbided by the D

FlipFlopG103.B (204C).

Th f thi i it i t

ORDER X OUT

NORMAL FLUORO MODE

As soon as BP RX is pressed, OX OUT passes to 1 logic.

When the BP RX is released, OX OUT is released when the time

T3 has expired.

ELECTRON RAD MODE

The working depends on the position of S502.1 (205B).

S 502.A in position OPEN

The RX emission is generated as soon as the BP OX is pressed and

S 502.A in position CLOSED

The RX emission is generated as soon as BP OX is pressed.

If the BP OX is released during the RX emission, the emission is

not interrupted, and the end of exposure will be given by the signal

STOP DSM c

stenoscop technical supplement 1173 pg

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