Belmont Belray II Service manual

DENTAL X-RAY

097

SERVICE

MANUAL

( for 220V, 230V, 240V )

R

INDEX

SECTION 1 : TECHNICAL DATA

page

[1]ELECTRICAL AND RADIATION DATA 2

[2]PHYSICAL DIMENSIONS 3

[3]TUBE HEAD THERMAL CHARACTERISTICS 5

SECTION 2 : OPERATION INSTRUCTION

[1]LAYOUT OF CONTROL BOX 6

[2]FUNCTION OF CONTROLS 7

[3]OPERATING PROCEDURES 9

[4]OPTIONAL HAND EXPOSURE SWITCH 9

[5]ALTERATION OF SETTING 10

SECTION 3 : DESCRIPTION FOR FUNCTIONS

[1]GENERAL 15

[2]AUTOMATIC VOLTAGE REGULATOR 16

[3]PRIMARY CIRCUIT OF HIGH VOLTAGE TRANSFORMER 16

[4]PRIMARY CIRCUIT OF FILAMENT TRANSFORMER 17

[5]AUTOMATIC TUBE CURRENT CONTROL 17

SECTION 4 : ADJUSTMENT

[1]AVR VOLTAGE 18

[2]INSPECTION OF TUBE CURRENT 20

[3]ADJUSTMENT OF TUBE CURRENT 21

[4]ADJUSTMENT OF LINE VOLTAGE MEASUREMENT ERROR 22

SECTION 5 : PERIODIC INSPECTION AND ADJUSTMENT

[1]ELECTRICAL INSPECTION AND ADJUSTMENT 23

[2]MECHANICAL INSPECTION 24

SECTION 6 : ERROR CODE 25

SECTION 7 : TROUBLE SHOOTING 27

SECTION 8 : REPLACEMENT OF COMPONENT

[1]CONTROL BOX 29

[2]TUBE HEAD 29

SECTION 9 : CIRCUIT DIAGRAM 30

- 1 -

3.7

3.7

3.7

Maximum Line Current at 7mA

[Aac]

[Aac]

Rated Line Power (Momentary rating)

Rated Line Current at 7mA

0.8

3.4

0.8

3.4

0.8

3.4

[kVA]

[Vac]

[Vac]

[Vac]

230

207

253

220

198

242

240

216

264

Rated Line Voltage Minimum Line Voltage Maximum Line Voltage

1. Nominal focal spot value ---------------------------------0.7 (IEC60336)

2. Rated peak tube potential -------------------------------- 70 kV

3. Rated tube current ----------------------------------------- 4 mA / 7 mA selectable 4. Maximum rated peak tube potential -------------------- 70 kV

5.

SECTION 1 : TECHNICAL DATA

[ 1 ] ELECTRICAL AND RADIATION DATA

	(Internal Resistance [Ω]		) 1.27max 1.33max 1.38max
	Range of Line Voltage Regulation	[%]	0 ~ 2 0 ~ 2	0 ~ 2
6. Power line frequency -------------------------------------			50 / 60Hz, Single Phase
7. Line power (Long term rating) --------------------------			12VA
8. Exposure time----------------------------------------------			0.02 ~ 3.2 sec.(ON and OFF are zero croseed)
9. Timer accuracy............................................................			±1 pulse (= 1/50 sec. or 1/60 sec.)
10. Inherent filtration------------------------------------------			1.7 mm Al Equivalent
11. Added filtration -------------------------------------------			0.5 mm Al
12. Minimum filtration permanently in useful beam -----			2.2 mm Al Equivalent at 70 kV(peak)
13. Nominal roentgen output			4 mA 7 mA
a. Distal end of regular cone -----------------------------			4.2mGy/sec.	7.1mGy/sec. ±40%
b. Distal end of long cone --------------------------------			2.4mGy/sec.	3.3mGy/sec. ±40%
14. Cone			Source to skin distance		Field size
	a. Regular cone.............................................................		204 mm	58mm dia., circular
	b. Long cone (Option) .................................................		305 mm	58mm dia., circular
15. Leakage technique factor ............................................			70 kV(peak), 494 mAs at 1 hour
16. Duty cycle ...................................................................			1 : 50 (0.5 sec. exposure with 25 sec. interval)
17. Source to the base of cone distance ............................			81 mm
18. Reference current time product...................................			22.4 mAs (70 kV(peak), 7 mA, 3.2 sec.)
19.	Maximum earth leakage current .................................		0.5 mA
20. Tolerance of the focal spot marking............................			±1 mm
21.	Target angle and material ............................................		16 ± 1°, Tungsten
22.	Maximum anode heat content .....................................		4.3 kJ (6 kHU)
23.	Maximum x-ray tube assembly heat content ..............		150 kJ (210 kHU)
24.	Nominal electrical output of H.V.Generator ..............		0.36 kW at 70 kV, 7 mA
25. Measurement base of technique factors			Focal spot marking
			Reference axis
	a. Peak tube potential ...................................................		Peak tube potential of conducting half cycle
	b. Tube current .............................................................		Average of tube current during one cycle of
			line frequency
	c. Exposure time...........................................................		Impulses of power line frequency
26	Environmental condition for storage............................		-20 ~ 70 , 10 ~ 90%, 500 ~ 1060 hPa
27.	Environmental condition for operation........................		10 ~ 40 , 30 ~ 75%, 700 ~ 1060 hPa
28.	Rotation angle of head ................................................		Horizontal 0 ~ 600°, Vertical 0 ~ 300°
29.	Service Life..................................................................		10 Years
		-2-

[ 2 ] PHYSICAL DIMENSIONS

220°

7/16"-18	(468)
WK Type

	5-5/8"(142)
				600°
2-1/4"				3-3/16"
(58)	31-1/2" (800)	Max. 46-7/8" (1190)		(80)
		Stroke 43-5/16" (1100)
		90	°
		90
		°

	1/2"-45 (1156)	Location for Wires
		300°
	34-1/2" (876)	MAX 73-1/8" (1857)

4-5/8" (117)

( ) =mm

56-1/2" ~ 78-3/16" (1435 ~ 1985)

~ 62-3/16"	1580)
-1/16"	(480 ~
19

	Cabinet Frame
	28-1/2" (723)		39-1/2" (1003)	48-1/4" (1225)	50-5/16" (1294)	Cone	(499) Long Cone
	9-3/16"	(233)				Short
						(398)
1/2" (115)	1-7/8"	(47)				15-11/16"	19-11/16"
4-				(20)
	6-3/16" (157)					7-15/16"
				13/16"
	38-5/16" (973)					(226)
	39-3/16" (995)					10-1/4"
	48-5/16" (1243)					(260)

Focal Spot Marking

Reference Axis

SSD

SSD + 195 mm

208 mm

SSD (Source to Skin Distance) :

a. Regular cone	----------8 inches (203 mm)
b. Long cone------------	12 inches (305mm)

Fig.1 Dimensions

-3-

FM Type
680
825
8
0°	117
536
	600°
Max.1190	80
Stroke 1100
Max.695
Sub Controller
	0°
	0
	3
Max.1000	270
1335	Max.1612 Stroke 1100
Main Controller
125

FK1/FK2 Type

220	2	0
°	2		°
				117
				600°
300			Max.1190	80
			Stroke 1100
Max.695
95
Sub Controller				°
				00
				3
1335	Max.1300			270
				Max.1718 Stroke1100
Main Controller

RK Type

500

	180	2
500	°	60	117
		°
			600°
130	260
	400	350	80

Max.2140			700
	106	506	270

Main Controller	300°
450 Stroke 200	775 Stroke

CK Type

220°

300°

117

600°

300	Max.1190	80
	Stroke1100

		670	Max.695
	470
			75
2300		16301970		1713. 187				°
							0
	1495		1350		Stroke1100	0
						3
						270

Fig.1-6 Dimensions

-4-

[ 3 ] TUBE HEAD THERMAL CHARACTERISTICS

A. Interval between each exposure

The temperature inside of the tube head rises when an exposure is made. The value of the heat generated is measured in Heat Units (HU), which is the product of tube potential, tube current and exposure time. Excessive heat will accumulate inside of the tube head if the x-ray is used without a proper cool down interval between each exposure. The excessive heat may damage the x-ray tube, high voltage generator or both.

B. Duty cycle

A cool down interval of 50 seconds or more must be allowed between each 1 second exposure. (a 25 second cool down must be allowed between each 0.5 second exposure.) This will avoid the accumulation of excess heat and prolong the tube head life.

C. Tube head cooling curve

1. Tube housing cooling curve

2. Anode thermal characteristics

	250								4500	4300J
															100W
									4000
	200								3500
(kH.U.)Storage								[J]Storage	3000
	150														50W
									2500
	100								2000
Heat								Heat
									1500			COOLING
	50								1000
									500
	0								0
	0	20	40	60	80	100	120	140	0	50	100	150	200	250	300

Time in Minutes	Time [S]

3. Maximum rating chart

Tube Current [mA]

20

50kV

18

16 60kV

14 70kV

12

10

8

6

0.1

0.2

0.3

0.5

0.7

1

2

3

5

7

10

Exposure Time [S]

-5-

SECTION 2 : OPERATION INSTRUCTIONS [ 1 ] LAYOUT OF CONTROLLERS

1

10 11 12 16 13 14

	3		15
	4		9
	5
	6		8
	7
			17
	2
			18
	Fig.2 Major Components and Control Identification
(1)	Main Power Switch	(10)	Cone Type Selection Switch
(2)	Ready Light	(11) Film Speed Selection Switch
(3)	Exposure Time Adjusting Switch (Down)	(12)	Digital Imaging Switch
(4)	Exposure Time Adjusting Switch (Up)	(13)	4mA Selection Switch
(5) Tooth Selection Switch (T1)		(14)	7mA Selection Switch
(6) Tooth Selection Switch (T2)		(15)	Patient Size Selection Switch
(7) Tooth Selection Switch (T3)		(16)	Exposure Time Display Window
(8) Tooth Selection Switch (T4)		(17)	Exposure Warning Light
(9) Tooth Selection Switch (T5)		(18)	Exposure Switch

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[ 2 ] FUNCTION OF CONTROLS

(1) Main Power Switch

Pushing the upper side of this switch to the ON position energizes the x-ray unit. (Ready light and pre-select light for cone type, film or digital, mA, and patient size illuminate.)

It is recommended to keep this switch OFF when the unit is not in use, in order to prevent an accidental exposure.

IMPORTANT : To prevent the risk of an accidental exposure, push the lower side of this switch to the OFF position, when the unit is not in use.

(2)Ready Light

This light illuminates when the line voltage is within operable range. When this light is not on, exposure can not be made.

(3)(4) Exposure Time Adjusting	Switches
By momentarily pushing the (	or ) switch, the exposure time displayed increases (or

decreses) by one increment. By keeping the switch depressed more 2 sec., the exposure time displayed increases (or decreases) continuously until the switch is released.

Model 097 has the following 23 exposure time settings :

0.00, 0.02, 0.03, 0.04, 0.05, 0.06, 0.08, 0.10, 0.13, 0.16, 0.20, 0.25, 0.32, 0.40 0.50, 0.63, 0.80, 1.00, 1.25, 1.60, 2.00, 2.50, 3.20 (sec.)

(5) ~ (9) Tooth Selection Switches (T1 ~ T5)

Pushing one of these switches sets the exposure time automatically for the following (10) ~ (15).

(5) T1 : Incisor of Mandible

(6) T2 : Incisor of Maxilla, Cuspid & Premolar of Mandible

(7) T3 : Cuspid & Premolar of Maxilla, Molars of Mandible, Bite Wing

(8) T4 : Molar of Maxilla, Bite Wing Molars

(9) T5 : Occlusal

If the T1 switch (5) is depressed more than 3 sec., unit goes into “ Lock Mode”.

In lock mode, the only functional switch is the power switch. To exit from the lock mode, depress the T1 switch more than 3 sec. again.

(10) Cone Type Selection Switch

Depressing this switch for more than 2 sec. selects the cone type : 8” standard cone or 12” optional long cone. (If the optional rectangular cone is to be used, select the 8” cone setting.)

(11)Film Speed Selection Switch

a.BELRAY II has 16 film speed settings : (F.00 ~ F.15)

Two speed settings are pre-set at the factory (a & b) and can be selected with (11).

a = Film speed No. F.09 (equivalent to ISO speed group “ D” or Kodak Ultra-Speed film) b = Film speed No. F.04 (equivalent to ISO speed group “ F/E” or Kodak InSight film)

b.Pushing this switch momentarily displays the selected film speed setting in the Exposure Time Display Window (16).

Depressing this switch for more than 2 sec. changes the film type being selected.

c.If the Digital Imaging Switch (12) is depressed, both of the film speed indicating light are turned off.

(12) Digital Imaging Switch

If a digital imaging system is used, shorter exposure time is often required. BELRAY II has 16 speeds for digital imaging : (d.00 ~ d.15). Pushing this switch momentarily displays the speed being selected in the Exposure Time Display Window (16). With the factory speed setting d.06, the exposure time becomes half of F.06 setting.

-7-

TABLE 1. Speed Setting and Exposure Time (Regular Cone)								[unit : sec.]
Speed	mA			Child							Adult					Obese
Setting		T1	T2	T3	T4	T5		T1	T2		T3	T4	T5	T1	T2	T3	T4	T5
F.09	4	0.20	0.32	0.40	0.50	0.80		0.32	0.50		0.63	0.80	1.25	0.40	0.63	0.80	1.00	1.60
	7	0.10	0.20	0.20	0.32	0.40		0.20	0.32		0.40	0.50	0.63	0.20	0.40	0.40	0.63	0.80
F.04	4	0.08	0.13	0.16	0.20	0.32		0.13	0.20		0.25	0.32	0.50	0.16	0.25	0.32	0.40	0.63
	7	0.05	0.08	0.10	0.13	0.16		0.08	0.13		0.16	0.20	0.32	0.10	0.16	0.20	0.25	0.32
d.06	4	0.06	0.10	0.10	0.16	0.20		0.10	0.16		0.20	0.25	0.40	0.10	0.20	0.25	0.32	0.40
	7	0.03	0.05	0.06	0.08	0.13		0.05	0.08		0.10	0.13	0.20	0.06	0.10	0.13	0.16	0.25

	TABLE 2. Speed Setting and Exposure Time (Long Cone)							[unit : sec.]
	Speed	mA			Child					Adult					Obese
	Setting		T1	T2	T3	T4	T5	T1	T2	T3	T4	T5	T1	T2	T3	T4	T5
	F.09	4	0.40	0.63	0.80	1.00	1.60	0.63	1.25	1.25	2.00	2.50	0.80	1.25	1.60	2.00	3.20
		7	0.25	0.40	0.50	0.63	1.00	0.40	0.63	1.80	1.00	1.60	0.50	0.80	1.00	1.25	2.00
	F.04	4	0.16	0.25	0.32	0.50	0.63	0.25	0.50	0.50	0.80	1.00	0.32	0.50	0.63	1.00	1.25
		7	0.10	0.16	0.20	0.25	0.40	0.16	0.25	0.32	0.40	0.63	0.20	0.32	0.40	0.50	0.80
	d.06	4	0.13	0.20	0.25	0.32	0.50	0.20	0.32	0.40	0.50	0.80	0.25	0.40	0.50	0.63	1.00
		7	0.06	0.13	0.13	0.20	0.25	0.10	0.20	0.25	0.32	0.40	0.13	0.25	0.25	0.40	0.50

(13) 4mA Selection Switch

By momentarily depressing this switch, the tube current is set at 4mA.

When Film switch is depressed, the tube current setting will be automatically changed to 7mA.

(14) 7mA Selection Switch

By momentarily depressing this switch, the tube current is set at 7mA.

When Digital switch is depressed, the tube current setting will be automatically changed to 4mA.

(15) Patient Size Selection Switch

This switch alters the selection of patient type/size to be radiographed (child adultObese child) and sets the exposure time automatically.

NOTE : Setting or adjusting the exposure time manually (with or switch) supersedes

(5) ~ (15) functions.

(16) Exposure Time Display Window

This window displays the selected exposure time. If an abnormal condition exists or a malfunction occurs, an Error Code is displayed. (See Section 6 : ERROR CODE)

(17) Exposure Warning Light

Illumination of this light indicates the unit is producing x-radiation.

(18) Exposure Switch

This switch initiates radiographic exposure. When making an exposure, depress and hold this switch unit the Exposure Warning Light (17) and the audible warning shut off. Failure to keep this switch depressed will result in the premature termination of the exposure and error code E.00 will be displayed in Exposure Time Display Window (16).

-8-

[ 3 ] OPERATING PROCEDURES

1.Turn ON the Main Power Switch (1).

2.Confirm that Ready Light (2) is illuminated.

NOTE : The ready light will not illuminate unless the incoming line voltage is correct and within the x-ray’s operable range.

3.Select the appropriate tooth type (5) ~ (9), and confirm the pre-selected conditions (cone type, film or digital, mA and patient size) are suitable for exposure.

NOTE : To manually set the exposure time, depress either of the manual Exposure Time Adjust Switches ( or ) until the desired exposure time appears in the Exposure

Time Display Window (16). While the unit is in manual mode, other selection switches

(5) ~ (15) do not affect exposure time. (All of the tooth selection lights are off.)

To return to the automatic exposure time selection mode, depress any one of Tooth Selection Switches (5) ~ (9).

4.Depress the Exposure Switch (8). When the Exposure Switch is depressed, the Exposure Warning Light (17) illuminates and the audible warning sounds. Do not release the Exposure Switch until the Exposure Warning Light and audible warning automatically shut off. Failure to keep the switch depressed will result in exposure being terminated prematurely.

5.To continue to radiograph other teeth, just select appropriate Tooth Selection Switches (5) ~ (9).

IMPORTANT : To protect x-ray tubehead from heat accumulation, wait for a time interval that is equal to 50 times the selected exposure time before making additional exposures. (Example : a 25 sec. wait is necessary between exposures that are

0.5sec. in duration.)

6.Turn OFF the Main Power Switch (1) in order to prevent accidental exposure when the unit is not in use.

NOTE : If the unit is left over 8 min. without being operated and Main Power Switch (1) is kept on, figure “ 1” runs through the Exposure Time Display Window (16).

This does not mean that malfunction of the unit has occurred ; this is an energy saving feature. The unit returns to ready condition by pressing any one of the switches, except the Exposure Switch (18).

[ 4 ] OPTIONAL HAND EXPOSURE SWITCH

An optional hand exposure switch can be connected to the sub controller. Since this exposure switch has a coiled cord, operators can stand in the most suitable position for operation.

As controller has separate connector for this exposure switch, both exposure switch (18) on the front panel of sub controller and this hand exposure switch can be used.

If local code prohibits use of both, disconnect the connector of either switch.

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