Summit 325E Service Manual

325E X-RAY GENERATOR

USER AND ASSEMBLER INFORMATION

For X-ray Control Model No.: F280

and X-ray High-voltage Generator Model No. A700

01496-000 Revision G

AUGUST 2005

SUMMIT INDUSTRIES, INC. 2901 W. Lawrence Avenue Chicago, IL 60625 773-588-2444 www.Summitindustries.net

				325E X-Ray Generator
	Summit Industries, Inc.			Model Numbers F280 / A700
		TEXT REVISION HISTORY FOR F285 MANUAL
	REVISION		ECR	DESCRIPTION		RELEASE DATE
	E		4196	UPDATED COVER SHEET AND		AUGUST 2004
				SCHEMATICS
	F		4484	ADDED ERROR CODES AND TUBE		FEBRUARY 2005
				PROTECT DIP SW. SETTINGS DUE
				TO 02249-000 TIMER BOARD.
				ADDED TEXT REVISION HISTORY
				PAGE, AND UPDATED TOC
	G		4727	UPDATED TOC TO INCLUDE 02581		AUGUST 2005
				SERVICE GUIDE

			325E X-Ray Generator
Summit Industries, Inc.			Model Numbers F280 / A700
		TABLE OF CONTENTS
I.	INTRODUCTION ..................................................................................................			2
II.	USER INFORMATION .........................................................................................			3
	A.	CONTROL FEATURES................................................................................		3
	B.	RECOMMENDED OPERATING PROCEDURES ........................................		6
	C.	MAINTENANCE ...........................................................................................		7
	D.	TECHNICAL INFORMATION .......................................................................		9
III.	ASSEMBLER INFORMATION............................................................................			11
	A.	CERTIFICATION OF COMPATIBILITY......................................................		11
	B.	RADIATION PROTECTION .......................................................................		11
	C.	ELECTRICAL POWER SUPPLY REQUIREMENTS ..................................		11
	D.	UNPACKING AND OPENING CONTROL..................................................		12
	E.	PRELIMINARY ASSEMBLY AND TUBE PROTECT SELECTIONS ..........		14
	F.	PRELIMINARY ELECTRICAL CHECKS AND ADJUSTMENTS ................		18
	G.	CALIBRATION............................................................................................		20
	H.	FINAL COMPLIANCE TESTS ....................................................................		26
	I.	ANCHORING CONTROL CABINET TO THE FLOOR ...............................		28

J.SCHEMATICS

1.	B127 --SCHEMATIC, 325 CONTROL CIRCUIT DIAGRAM ..................	29
2. 02249-002 -- COMPONENT LAYOUT FOR TIMER DRIVER PCBA .....		30
3.	B130-- SCHEMATIC, MOTOR START CRCT ......................................	31
4.	B131--PARTS LAYOUT FOR MOTOR START CRCT (A455) .............	32
5.	B132-- SCHEMATIC FOR KV COMP. PCB ASSY. (01204) .................	33
6.	B133--HIGH TENSION TRANSFORMER DIAGRAM (A700)...............	34
7.	02249-003--SCHEMATIC AND COMPONENT LAYOUTS …………….35
K. SERVICE GUIDE, SINGLE-PHASE GENERATORS (02581)...................		36

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	325E X-Ray Generator
Summit Industries, Inc.	Model Numbers F280 / A700

I. INTRODUCTION

The equipment, which is described in this manual, will perform reliably when installed, operated, and maintained in accordance with the instructions of this manual.

This equipment is sold with the understanding that the user assumes sole responsibility for radiation safety and that the manufacturer does not accept any responsibility for the following:

1.Equipment improperly installed.

2.Equipment improperly used.

3.Equipment improperly maintained or repaired.

4.Equipment, which has been modified or altered in any way.

5.Injury or damage to patient or other personnel for any of the above causes.

We are proud of our products and are confident they will provide many years of useful and enjoyable service.

Summit Industries Inc.

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	325E X-Ray Generator
Summit Industries, Inc.	Model Numbers F280 / A700

II. USER INFORMATION

This x-ray generator is both easy to use and very versatile. It consists of an x-ray control and a high voltage generator (H.V. generator).

A. CONTROL FEATURES

Refer to photo on page 6 for location of the following controls and indicators:

Note: Refer to Section B, “Recommended Operating Procedure” for detailed description of proper use of these controls and indicators.

A)Power “on” – “off” switch – Controls power to the system.

B)Power “on” light – Indicator light lights when power is “on”.

C)Bucky selector switch – Allows selection of either wall bucky, table bucky, or no bucky.

D)Line check rocker switch – When depressed, this switch causes the kVp meter (O) to indicate if the line voltage compensator (E) is adjusted properly.

E)Line voltage compensator – Allows operator to adjust input circuit of x-ray control to match the line voltage easily and effectively.

F)Tube current (mA) selector switch – Rotary switch allows operator to select the optimum tube current and focal spot for the desired technique.

G)Digital display – This display provides three very useful features:

1.Pre-exposure indication of mAs (the product of mA and exposure time).

2.Post-exposure indication of the number of x-ray pulses counted during the previous exposure.

3.Error codes to indicate generator status or inappropriate selection.

	Error Code	Indicated Fault	Corrective Action Required
	E01	Tube Limits Exceeded	Reduce kVp, mA or Time
	E02	kVp too high (>128 kVp)	Select 125 kVp or less
	E03	kVp too low (<37 kVp)	Select 40 kVp or more
	E04	Invalid mA setting	Reselect mA station
	E06	Invalid Time Selection	Reselect Time station, call for
		or Leaking SCR	service if error won’t clear.

We recommend that the above chart be kept available for easy reference.

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	325E X-Ray Generator
Summit Industries, Inc.	Model Numbers F280 / A700

H)X-ray exposure switch – Two level switch: Partial depression (PREP) causes anode rotation and filament current boost. Full depression (EXPOSE) initiates the production of x-rays.

I)Exposure time selector switch – Provides the operator capability to select any one of 23 different exposure times.

J)Exposure interlock “ready” light – Indicator light lights when all exposure interlocks are closed. (Collimator interlock, tube thermal protection, misc. exposure interlock devices, etc.) When this light is “off”, exposures will not be allowed.

K)Tube ratings exceeded light – Indicator light lights when internal electronic circuitry detects that selected technique factors exceed the single exposure ratings of the x-ray tube. Under these conditions, x-ray exposures are not allowed.

L)Milliampere meter – Indicates actual tube current during an x-ray exposure. Meter deflection is the visual indication of x-ray production.

M)kVp minor selector – Provides fine adjustment of peak tube potential (kVp).

N)kVp major selector – Provides coarse adjustment of peak tube potential (kVp).

O)KILOVOLT meter – Pre-reading meter, which indicates selected peak tube potential (kVp). This meter also serves as an indicator of line voltage adjustment in conjunction with item (D) above.

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	325E X-Ray Generator
Summit Industries, Inc.	Model Numbers F280 / A700

M

L

N

K

J

O

A

I

B

H

C

D
				G
		E	F

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	325E X-Ray Generator
Summit Industries, Inc.	Model Numbers F280 / A700

B. RECOMMENDED OPERATING PROCEDURES

Note: It is important to turn the generator “on” at least 15 minutes before making an exposure. This will provide sufficient “warm-up” time for the circuitry to stabilize.

1.Turn the system “on” by slowly snapping the power switch (A) to the right. Power “on” light (B) should light.

2.Check the line voltage by depressing “line check rocker switch” (D) while observing the kVp meter (O). Rotate the knob of the “line voltage compensator” (E) as necessary until the needle of the kVp meter falls within darkened area of the scale marked “V”, (as near the center of the area as possible.)

Note: If you are unable to position the needle within this area, it is an indication that the line voltage is not correct and the equipment should not be used. Either wait for line voltage to change or call for service.

3.Determine the desired technique factors Note: Do not exceed the x-ray tube ratings. Refer to x-ray tube rating charts provided with the x-ray tube. If the technique factors are set beyond the x-ray tube limits “E01” should appear in the digital display window, preventing exposure.

Note: Proper warm-up of the anode must be done on a cold unit prior to making exposures. The specific details may be found in “General Information for Installing and Operating X-Ray Tubes”, that is included with each tube shipped. The warm-up procedure tags are attached to each unit. Basically this procedure will reduce the chance of tube damage due to thermal shock.

4.Select the desired tube current. Selecting the 50 or 100 mA stations automatically determine that the small Focal Spot will be used. The 150, 200, and 300 mA stations are internally connected to the large F.S.

Note: Select the desired tube current (mA) prior to selecting the desired peak tube potential (kVp).

If at any time, a different tube current is selected, it will be necessary to reset the kVp selector switches.

5.Rotate the exposure time selector switch (I) to the desired time setting.

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	325E X-Ray Generator
Summit Industries, Inc.	Model Numbers F280 / A700

6.Observe the digital display (G) to confirm that the correct mAs has been selected.

7.Select the desired peak tube potential (kVp) by observing the kVp meter (O) while rotating the kVp selectors (M&N)

8.This generator is equipped with tube protect circuitry that compares the selected technique factors to the “single exposure ratings” of the x-ray tube. Exposures will only be allowed if the selected values are less than or equal to the x-ray tube limits. Refer to the chart below for description of “E01” error.

9.If the x-ray system includes a bucky (wall or table or both) and it is desired to use a bucky technique, select the appropriate bucky by depressing the bucky selector switch. If a non-bucky technique is desired select the center “off” position of the bucky selector switch.

10.This generator is also equipped with an indicator light identified as “exposure interlocks ready” light, which monitors the status of all auxiliary exposure interlock circuitry. When all interlocks are ready the light will light. If the light is not “on”, x-ray exposures will not be allowed. Such interlocks might be SID interlock switches, tube thermal protectors, collimator interlock, etc.

11.Depress the exposure switch approximately halfway. This action will cause the rotating anode of the x-ray tube to accelerate to full speed and the selected filament of the x-ray tube to heat up to its proper emission temperature. Depress the exposure switch fully and hold. A beep tone will indicate the termination of the exposure, and the mA meter deflection will provide a visual indication of x-ray production.

Note: It is permissible to depress the exposure switch fully in one motion. There will be however, a one second delay before x-ray production begins.

After the exposure terminates, but while the exposure switch is still depressed, the digital display will flash “on” and “off” indicating the number of x-ray pulses produced. This is primarily a service feature provided for the x- ray serviceman to verify proper operation.

12.Error codes and corrective action for digital display window.

	Error Code	Indicated Fault	Corrective Action Required
	E01	Tube Limits Exceeded	Reduce kVp, mA or Time
	E02	kVp too high (>128 kVp)	Select 125 kVp or less
	E03	kVp too low (<37 kVp)	Select 40 kVp or more
	E04	Invalid mA setting	Reselect mA station
	E06	Invalid Time Selection	Reselect Time station, call for
		or Leaking SCR	service if error won’t clear.

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	325E X-Ray Generator
Summit Industries, Inc.	Model Numbers F280 / A700

C. MAINTENANCE

Periodic inspection and preventative maintenance of this equipment is necessary to assure continued safe performance and compliance with applicable state and federal regulations. The following maintenance program must be closely followed.

Q:Who should perform the service?

A:Service personnel specifically trained, experienced, and familiar with this type of medical x-ray equipment.

Q:When and How often?

A:Appropriate inspection and service should be performed 30 days after installation and every 6 months thereafter.

Q:Specifically, what must be inspected, tested and/or serviced?

A:Several things:

1.Verify that the knob on exposure time selector is mounted solidly and indicates the proper value.

2.Verify that all push-button and rocker switches operate freely with no sticking or hanging up.

3.Verify proper operation of all pilot lights.

4.Verify proper operation of audible and visual indicators of x-ray termination and production respectively.

5.Verify the accuracy of exposure timer, tube current, and peak tube potential, and adjust as necessary.

6.Perform reproducibility and linearity tests and verify compliance.

7.Inspect electro-mechanical contactor for pitting and/or burned contacts. Replace if necessary.

8.Examine terminal connections of high voltage generator. All terminals should be tight.

9.Examine oil level of H.V. generator and refill as necessary. There should be approximately ½ to ¾” air space between the oil and the inside edge of the generator cover.

10.Examine the plugs of the high voltage cables. They should be clean with no signs of carbon tracking.

Note: This x-ray generator should not be altered or modified in any way as such action may invalidate its regulatory compliance and void the factory warranty.

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	325E X-Ray Generator
Summit Industries, Inc.	Model Numbers F280 / A700

D. TECHNICAL INFORMATION

Rated line voltage – 240 VAC, 60 Hz., single phase.

Range of line voltage regulation at max. line current = 1-5%

Maximum line current based on input voltage of 240 VAC -140A.

Technique factors that constitute the maximum line current – 300 mA @ 125 kVp.

Generator rating-

Output Current = 50-300mA.

Output Voltage = 40-125kVp.

Generator duty cycle-

100mA @ 125 kVp – 4% 200mA @ 125kVp – 2% 300mA @ 125kVp – 1%

Maximum Deviation

The following maximum deviation statements are broad and considered “worst case” conditions.

Typical performance will normally be significantly better.

Peak Tube Potential (kVp)

The Maximum Deviation of the Peak Tube Potential during an exposure from its preindicated value is + 20% of the kVp meter’s full-scale value. The measurement basis upon which the peak tube potential is defined is a calibrated high voltage divider unit such as the Machlett Dynalyzer.

Tube Current

The Maximum Deviation of the tube current during an exposure from its pre-indicated value is +10% of selected value within a kVp range of 50-125 kVp (inclusive), and +20% of selected value within a kVp range of 40-50 kVp (exclusive). The measurement basis upon which the tube current is defined is a calibrated D.C. milliammeter in series with the x-ray tube.

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	325E X-Ray Generator
Summit Industries, Inc.	Model Numbers F280 / A700

Exposure Time

The maximum deviation of the measured exposure time from its pre-indicated values is

+1 pulse for selected times within the range of 1/120 – 1/10 sec.

+15% of selected times within the range of 3/20-6 sec.

The measurement basis upon which the exposure time is defined as the number of half cycle impulses of the 60 Hz power line measured either at the primary of the high voltage generator with an oscilloscope or in the secondary of the high voltage generator by means of a high voltage divider unit and an oscilloscope.

Tube Current-Exposure Time Product

The digital display of mAs provided is not a primary indication of technique factors. It is intended solely as an auxiliary indication to verify the product of the primary control settings: tube current and exposure time. As such, a statement of maximum deviation is not provided.

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