7/18/2019 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
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Chicago, IL 60625
7/18/2019 Summit 325E - Service Manual

  325E X-Ray Generator

Summi t Industri es, Inc. Model Numbers F280 / A700

TEXT REVISION HISTORY FOR F285 MANUAL

REVISION ECR DESCRIPTION RELEA SE 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

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7/18/2019 Summit 325E - Service Manual

  325E X-Ray Generator

Summi t Industri es, 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
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7/18/2019 Summit 325E - Service Manual

  325E X-Ray Generator

Summi t Industri es, 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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7/18/2019   Summit 325E
325E- Service
X-Ray Manual
Generator
Summi t Industri es, 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

description B, “use
of proper Recommended Operating
of these controls Procedure” for detailed
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
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E02 kVp too high (>128 kVp) Select 125 kVp or less
7/18/2019   325E
Summit 325E X-Ray
- Service Generator
Manual
Summi t Industri es, 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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7/18/2019   325E
Summit 325E X-Ray
- Service Generator
Manual
Summi t Industri es, Inc. Model Numbers F280 / A700

M
L

K
J

 A
I

D
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E F
7/18/2019   325E
Summit 325E X-Ray
- Service Generator
Manual
Summi t Industri es, Inc. Model Numbers F280 / A700

B. RECOMMENDED OPERATING PROCEDURES

 
Note: It is important to turn the generator “ on” at least 15 minut es 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 the

observing line kVp
voltage by depressing
meter (O). “linethe
Rotate check rocker
knob switch”
of the “line(D) while
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 l ine 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 provi ded with the x-ray
tube. If the technique factors are set beyond the x-ray tube limits “ E01”
shoul d appear in the digital display window , preventing exposure. 

Note: Proper warm-up of the anode must be done on a cold uni t prior t o
making exposur es. The specific details may be found in “ General
Information fo r Installing and Operating X-Ray Tubes” , that is includ ed
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 t hermal 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).
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If at any time a different tu be current is selected it wil l be necessary t o
7/18/2019
  325E X-Ray Generator
Summit 325E - Service Manual
Summi t Industri es, 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.
is not “on”, When all will
x-ray exposures interlocks
not be are ready Such
allowed. the light will light.
interlocks If the
might be light
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

moti on. There will be how ever, a one secon d 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

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   325E X-Ray Generator
7/18/2019 Summit 325E - Service Manual
Summi t Industri es, 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 sho uld not b e altered or modified in any way
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as such action may invalidate its regulatory compliance and void the
   325E X-Ray Generator
7/18/2019 Summit 325E - Service Manual
Summi t Industri es, 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
200mA @
@ 125
kVp –– 2%
4%
125kVp
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 pre-
indicated 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
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value is +10% of selected value within a kVp range of 50-125 kVp (inclusive) and +20%
   325E X-Ray Generator
7/18/2019 Summit 325E - Service Manual
Summi t Industri es, 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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   325E X-Ray Generator
7/18/2019 Summi t Industri es, Inc. Summit
Model325E - Service Manual
Numbers F280
/ A700

III. ASSEMBLER INFORMATION

 A. CERTIFICATION OF COMPATIBILITY

 
The manufacturer certifies that it’s certified x-ray controls and high voltage generators
are compatible with all certified x-ray tubes concerning compliance with 21CFR,
Chapter I, Sub-chapter J, only if the ratings of the controls, generators and tubes are
strictly observed and the control is calibrated within the applicable published limits.

Our
will certified
not affectcontrols and generators,
the compliance whencomponents
of these combined with
whenother certified
these components,
components are
installed, connected and adjusted in accordance with the applicable manufacturer’s
instructions and specifications.

Note: It is the assembler’s responsibility to verify compatibility of all components

assembled as parts of the x-ray system. Refer to compatibil ity statements
published by the component manufacturer for this specific i nformation.

B. RADIATION PROTECTION
 
Most states and local governments have regulations, which specify minimum safety
requirements for radiation protection. Consult your local regulations for specific
requirements.

C. ELECTRICAL POWER SUPPLY REQUIREMENTS

 
The information provided below is taken from NEMA standards, Minimum Power Supply
Requirements for X-Ray Machines, and National Electric Code.

Equipment Category – 300mA at 125kVp, single phase.

Nominal Line Voltage – 240 VAC., 60 Hz., single phase.

Note: Alternate line voltages, which wil l provide normal operation, are 208-277
VAC. 

Maximum Momentary Line Current – 140 amperes (at 240 VAC)

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N t M i t li t t lt t li lt b
   325E X-Ray Generator
7/18/2019 Summi t Industri es, Inc. Summit
Model325E - Service Manual
Numbers F280
/ A700

Line Voltage Regulation – Not to exceed 5% at maximum line current.

Percent line voltage regulation = VN – VL 
X 100
VL

where VN represents the line voltage under “no load” conditions, and V L represents line
voltage under “full load” conditions.

Minimum Over Current Protection Rating – 50% of maximum line current rating or
greater. Assuming maximum line current to be 140 amps, this value would be 70
amperes or greater.

Wire Size from Power Transformer to Disconnect Switch – for 50 feet use #2AWG; for
100 feet use #00AWG; for 200 feet use 250mcm
(mcm – thousand circular mils.)

Connection to Supply Circuit (taken from N.F.P.A. 70-1984)

 A disconnecting means of adequate capacity for at least 50% of the input required for
the momentary rating shall be provided in the supply circuit. The disconnecting means

shall be operable
Laboratories also from a location
requires readily
that this accessible
disconnecting from the
means be x-ray control.
mounted Underwriters
on either the wall
behind the x-ray control or the wall directly adjacent to it.

D. UNPACKING AND OPENING CONTROL

 
1. Open all cartons carefully and examine contents. If damage is found notify the
freight company immediately to file claim. Do not dispose of cartons or packing
materials until installation is complete, and any damage claims have been
settled.

2. Verify that the oil level in the H.V. generator is approximately ½” to ¾” below the
underside of the cover. Refill with “Shell Diala oil AX” or equivalent as
necessary.

3. Once the H.V. generator is in its final location, loosen the screw on the vent plug
to allow for oil expansion. Cover the vent plug and flange with one of the loose
fitting plastic covers provided with the H.V. generator to prevent contaminants
from entering the oil.

4 To open control for service

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   325E X-Ray Generator
7/18/2019 Summi t Industri es, Inc. Model
Summit Numbers
325E F280
/ A700
- Service Manual

5. From the inside of the control, remove the two thumbscrews and washers from
front panel being careful not to drop them into the cabinet.

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   325E X-Ray Generator
7/18/2019 Summi t Industri es, Inc. Model
Summit Numbers
325E F280 / A700
- Service Manual

6. Grasp the “lift tab” at the center of the front panel (near the top) and lift upwards
approximately 1” to unhook the bottom of the front panel from the base of the
cabinet. While holding the panel up, push out the bottom and lower it to the floor.
Then tilt the lid back to its normal position so that the front panel can be
removed.

7. See photo below for parts layout of electrical chassis assembly.

E. PRELIMINARY ASSEMBLY

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   325E X-Ray Generator
7/18/2019 Summi t Industri es, Inc. Model Numbers
Summit 325E F280 / A700
- Service Manual

2. Connect x-ray tube

a) High voltage cables (HV cables) – The high voltage generator requires the
use of H.V. cables constructed with federal terminals. Note: Use extreme
care when handling the H.V. cables to avoid damaging the plug or
terminal pins.

Be sure that “Anode” of H.V. generator connects to “Anode” of x-ray tube, and
“Cathode” to “”Cathode”. H.V. cable terminals must be thoroughly cleaned
and then coated with a thick coating of Vapor Proofing Compount (normally
provided with the x-ray tube) prior to insertion into the x-ray tube or H.V.
generator receptacles.

Insert the H.V. cable terminals into the appropriate receptacle and screw the
cable nut as tightly as possible by hand – do not use tools for t ightening.

b) Stator cable – This x-ray control will accept either a 3 or 5 wire tube stator

cable.
09, T5, The terminals of the x-ray control are on TB3 and are marked 07, 08,
and T6.

TERMINAL CONNECTIONS COLOR CODE FOR STATOR CABLE

MARKINGS EUREKA/ MACHLETT SUMMIT and
OF (TB3) VARIAN TUBES TOSHIBA
TUBES TUBES
07 RUN WDG. OF TUBE STATOR BLACK BLACK BLACK
08 START WDG. OF TUBE STATOR RED GREEN RED
09 COM. LEAD OF TUBE STATOR WHITE WHITE WHITE
T5 *THERMAL CUTOUT SWITCH ORANGE/ ---- YELLOW
(OPTIONAL) BROWN
T6 *THERMAL CUTOUT SWITCH BROWN/ ---- BLUE
(OPTIONAL) ORANGE

*If tube has thermal cutout switch, remove jumper across T5 and T6 and
connect leads as indicated. If tube does not have thermal cutout switch,
terminals T5 and T6 must be jumpered together. (Control is shipped with
this jumper installed.)

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   325E X-Ray Generator
7/18/2019
Summi t Industri es, Inc. Model Numbers F280 / A700
Summit 325E - Service Manual

3. Connect high voltage generator to control –

a) The 25’ primary cable for the H.V. generator is connected to the control at the
factory. The loose end, marked P1, P2, and GND, should be connected to
the corresponding terminals of the H.V. generator.

b) The 25’ filament supply cable for the H.V. generator is connected to the
control at the factory. The loose ends, marked XC, XS, XL, and MI are to be
connected to the corresponding terminals of the H.V. generator.

4. Connect collimator and/or electric locks (if applicable) –

This x-ray control is provided with fused power supplies rated 24 VACm 10Amp
max. (terminals “C1 and “C2” of TB2) and 24 VDC 8Amp max. (terminal “DC+”
and “DC-“ of TB2).

5. Exposure interlock circuits –

This x-ray
auxiliary control circuitry
interlock provideswhich
pairsinhibit
of terminals which can These
x-ray exposures. be used to connect
terminal pairs
are marked T6/T7, and T7/F2 of TB3. Removable jumper clips are connected
across these terminals at the factory. If it is necessary to connect an interlock
switch into the exposure circuit, remove one of these jumpers and connect the
interlock leads across the opened terminals. Note: Any interlock switch to be
used must be rated 125 VAC, 2 Amps mi nimum . 

6. Bucky connections –
This control provides terminals which can be used to operate one or two buckys.
The terminals are designated B1W, B2W, B3W, and B4W for “wall” buckys; and
B1T, B2T, B3T, and B4T for “table” buckys. Since several types of buckys may
be used, be sure to connect bucky to appropriate terminals as indicated below.
 All bucky’s must be configured for 115 VAC operation.

MIDWEST L-F PAR SPEED LIEBEL-FLARSHIEM 8000 SUMMIT BUCKY "J500"

14 X 36 (PRE-1989) AND MIDWEST 7440
B1 B2 B3 B4 B1 B2 B3 B4 B 1 B 2 B 3 B 4 B 6 B8 B 1 B 2 B 3 B 4 B 6 B8
 .     D     L
    E
    N     R      E     K
    R     E     Y
    E     B     T
    I     /     C
    U H     N     A
L R L
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   325E X-Ray Generator
Summi t Industri es, Inc. Model Numbers F280 / A700
7/18/2019 Summit 325E - Service Manual

7. Auxilary exposure switch –

Terminals have been provided in the control for connecting an auxilary exposure
switch. They are on TB2 and are marked S1, s2, and S3. Refer to control circuit
schematic for connection details.

8. Power supply –

 A 13 ft. line cable marked L1, L2, and GND is provided. One end is connected to
the control at the factory. The other end is to be connected to the disconnect
switch to the appropriate terminals. The disconnect switch should be “off” before
making connections. Be sure to connect the green “GND” lead to a “GOOD”
ground.

9. Tube Protect DIP Switch Selection –

The 02249-000 timer board has a DIP switch (S1) to select the tube protect limits
for the x-tube type used at this installation. The new U1 chip will be labeled with
generator type (325 or 360), line frequency (50 or 60 Hz), and tube manufacturer
(Summit/Toshiba or Varian/Eureka). Verify the chip type installed is appropriate
for the generator, line frequency and tube type at this site. DIP SW1 positions
will select the specific type of x-ray tube insert at this site (see table below). For
the DIP switch “OFF” is to the left, “ON” is to the right. Any change to the DIP S1
settings must be done while the generator is turned OFF.

DIP SW (S1) Settings

Tube Mfg, Insert, (Focal Spot)
S1-1 S1-2 S1-3
Toshiba E7239 (1.0/2.0) OFF OFF inactive
Toshiba E7242 (0.6/1.5) OFF ON inactive
Toshiba E7252 (0.6/1.2) ON OFF inactive
Toshiba E7813 (1.0/2.0) ON ON inactive
Varian Rad 8 (1.0/2.0) OFF OFF inactive
Varian Rad 74 (0.6/1.5) OFF ON inactive
Varian Rad 14 (0.6/1.2) ON OFF inactive
Varian Rad 13 (1.0/2.0) ON ON inactive

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   325E X Ray Generator
Summi t Industri es, Inc. Model Numbers F280 / A700 
7/18/2019 Summit 325E - Service Manual

F. Preliminary Electrical Checks and Adjustments

 

1. Line voltage adjustments –

Terminals in the control on TBI are provided for coarse adjustments of line
voltage. Measure the line voltage at the disconnect switch and relocate wire
marked LVA to the corresponding terminal. See below for details.

If line voltage measures 190-203V connect LVA lead to term “198”

If line voltage measures 204-219V connect LVA lead to term “212”
If line voltage measures 220-233V connect LVA lead to term “228”
If line voltage measures 234-249V connect LVA lead to term “242”
If line voltage measures 250-263V connect LVA lead to term “258”
If line voltage measures 264-280V connect LVA lead to term “272”

2. Preset all selector switches –

Prior to turning “on” power, set each selector switch as follows:

Power “on-off” - “off”

Bucky switch - “off”
kVp major and minor - fully counterclockwise
Line voltage compensator - approximately halfway
mA selector - 150L
Time selector - 1/120 sec.

3. Disconnect leads marked P1 and P2 from H.V. generator and insulate with
electrical tape. This will prevent accidental production of x-rays during initial
check-out. Switch the disconnect switch “on” and then switch the control’s “on-
off” switch “on”.

Observe the following:

-Power “on” light is lit.

-kVp meter indicates approximately 20 kVp.
-mA meter indicates zero.
-Digital display indicates E03 (kVp too low)
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  325E X-Ray Generator
 Summi t Industri es, Inc. Model Numbers F280 / A700
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Note that the 02249-000 timer board will display error codes per the table below. If
more than one selection is invalid the highest number will take precedence. For
example, an “invalid mA” and “kVp too low” would display as E04. Once the mA error is
cleared the kVp low error E03 would then be displayed.

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
Invalid Time Selection Reselect Time station, call for
E06
or Leaking SCR service if error won’t clear.

4. Depress and hold “line check rocker switch” and observe kVp meter. Rotate “line
voltage compensator” until kVp meter needle is in the black area of the scale
marked “V”. Release line check rocker switch.

5. While observing the tube filaments through the port of the x-ray tube, verify that
the correct filament is lit for each mA station.

6. Depress the exposure switch to the 1st  stage (prep.) and verify anode rotation
and filament boost.

7. The kVp meter circuit is factory adjusted, but should be checked to verify
approximate calibration.

a) With power “off” connect an “AC” voltmeter capable of reading 0-250 VAC
across the wipers (center terminals of tap switches) of the KV selector
switches (major and minor). This will allow measurement of the “no-load”
primary voltage.

b) Turn “on” power and adjust the kVp selector switches to result in 220 VAC
indicated on the voltmeter.

c) Compare the kVp meter indications for all mA stations with the values given
below:

mA STATION kVp METER INDICATION (kVp)

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Then reset kVp selectors to result in voltmeter indication of 160 VAC.

mA STATION kVp METER INDICATION (kVp)

50 81
100 80
150 76
200 69
300 53

If the kVp meter indication varies by more than 5 kVp from the values
given above, proceed to the kVp calibration procedure (page 23).

8. Check proper operation of all auxiliary devices and interlocks (electric locks,
collimator, auxiliary exposure switch, bucky, etc.)

9. Switch the disconnect switch “off” and reconnect the leads P1 and P2 to the H.V.
generator.

G. CALIBRATION
 
This x-ray generator has been fully tested and calibrated using a “production test” x-ray
tube. Because the tube characteristics of this tube may vary from the tube
characteristics of the specific tube being installed, the assembler must check the
accuracy of the tube current, and make the appropriate adjustments.

This
powerequipment
supply as has been below:
described designed and calibrated based on proper connection to a

-Nominal line voltage – 190-280 VAC 60 Hz. single phase

-Maximum line voltage regulation – 5% at full rated load (300 mA 125 kVp)

Calibration will normally involve only slight adjustments of the tube current and
verification of KV accuracy.

It is recommended that the assembler read and understand the information provided
with the x-ray tube prior to making any x-ray exposures. Particular attention should be
given to:

a) Pre-warming of the anode

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1. Calibration of Tube Current

 
 Achieving maximum accuracy of tube current involves two types of adjustments:

•  Overall mA level (bands of filament resistors RXS and RXL), AND

•  mA balance throughout the useful kVp range (bands of space charge
compensating resistor RSCC).

The leads connected to the resistor bands of RXS and RXL are marked with
numbers, which correspond to the mA stations. Moving one of these bands to
the right increases the tube current for the corresponding mA station.

The leads connected to the bands of RSCC are also marked with numbers,
which correspond the mA stations. Moving one of these bands to the right
causes a reduction of mA at high kVp levels as compared to low kVp levels for
the corresponding mA station. This is commonly referred to as the balance
adjustment.

Note: If a band
corresponding tubeofcurrent
RXS oris RXL is all
not up the proper
to the way to level,
the right & th
it may e
be
necessary to reposition the right-most band of Boost Resistor, “ RB”.
Moving this band to the right causes tube current to increase for all mA
stations.

a) Select 150 mA and 80kVp

b) Adjust
(movingthe
the band of the
band to RXL marked
right 150mA).
increases to produce approximately 156 mA

c) Select 50 kVp and note the mA produced.

d) Select 120 kVp and note the mA produced.

e) If the mA at 120 kVp is higher than the mA at 50kVp, move the band of RSCC
marked 150 to the right. If lower, move the band to the left.
f) Repeat steps (a) through (f) until no further adjustments are necessary.

g) Check mA tracking from 50 to 120 kVp and fine tune as required. The unit is
capable by fine tuning to deviate no more than approximately 5% of selected
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mA

+ 5% SELECTED mA
- 5%

0 50 80 125 140 kV p

h) Repeat steps (a) through (g) for the remaining mA stations:

Note: In step (b), use the follow ing values in place of 156 mA.

MA STATION MA
50 52
100 105
200 210
300 315

2. Peak Tube Potential (kVp)

This x-ray generator comes equipped with an adjustable circuit used to

compensate the kVp meter for loading effects. This circuit is identified as “kVp
Meter Compensation Circuit”. Its adjustments consist of:

(5) Independent offset pots (marked to correspond to the appropriate mA

station)

(1) Common slope pots Rs

These adjustment pots are all mounted onto a small P.C.B., which clearly
identified inside the control on the electric chassis.

a) Verify kVp meter movement accuracy.

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METER VOLTAGE kVp METER

(VAC) INDICATION
86 50 kVp
138 80 kVp
172 100 kVp
207 120 kVp

b) Verify kVp METER COMP. CIRCUIT input voltage and write down factory kVp
METER offset calibration data.

1) Connect an AC voltmeter between TP-1 and Tp-2 of the kVp COMP. PCB.
Verify that voltage is 100 VAC.

2) Turn unit power OFF. Disconnect connector J1 of kVp METER COMP.

PCBA. Turn power ON. Connect AC voltmeter between Tp-1 and Tp-3,
measure the offset voltage for 50 mA station and enter result in the Table.

3) Repeat step 2 for all remaining mA stations using test points indicated in
table below. Use results for future reference.

4) Turn power OFF. Reinstall connector J1, turn power ON.

mA STATION 50 mA 100 mA 150 mA 200 mA 300 mA

TEST POINTS TP1-TP3 TP1-TP4 TP1-TP5 TP1-TP6 TP1-TP7
FACTORY
CALIBRATION
FIELD
CALIBRATION

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c) Verify and adjust kVp meter accuracy

1) Select 150 mA and 50 kVp. While monitoring mA and kVp output,

compare the measured kVp to the kVp meter’s preread indication.
Note: In order to make a valid comparison between the measured
peak tube potential (kVp) and the kVp meter’s preread
indication, the tube current must be calibrated accurately.
Failure to do so will result in an erroneous determination of
kVp accur acy.

2) Adjust the 150 mA offset pot until the kVp meter’s preread indication
matches the measured kVp output.

3) Select 120 kVp. Make an x-ray exposure and adjust the common slope
pot until the kVp meter’s preread indication matches the measured kVp
output. Repeat steps 1, 2 and 3 above until no further adjustments are
necessary.

4) Select 50 mA and 90 kVp; Adjust the 50 mA offset pot until the kVp
meter’s preread indication matches the measured kVp output.

5) Repeat step 4 for each remaining mA station, adjusting the corresponding

pot as necessary.

6) Check final kVp meter tracking over the entire kVp range. Under normal

conditions
kVp output the kVp meter’s
by more indication will not deviate from the measured
than 5 kVp.

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H. FINAL COMPLIANCE TESTS

 
It is necessary for the assembler to perform tests on the newly-assembled x-ray system
prior to release to the user. These tests must assure compliance with the applicable
requirements of the FDA performance standard at the time of installation.

Perform these tests in accordance with NEMA publication #XR8-1979, Tests Methods
for Diagnostic X-Ray Machines for Use During Initial Installation. It is necessary that the
assembler document these tests to demonstrate at a later date that all tests were
performed and that the x-ray system was left in full compliance with the standard. The
test results obtained must verify that the following system specifications are met or the
system must be removed from service until corrective action is completed.

SYSTEM SPECIFICATIONS

BEAM QUALITY
 
The half-value layer of the useful beam shall not be less than 3.5mm of aluminum.

REPRODUCTIBILITY AND LINEARTIY

When the x-ray unit is operated on an adequate power supply (see section IIA): (1) the
estimated coefficient of variation of radiation exposure shall not be greater than .048 for
any specific combination of technique factors, and (2) the average ratios of exposure to
the indicated tube current exposure time product (mAs) obtained at any two consecutive

tube current settings shall not differ by more than .095 timed their sum, or
X1 – X2
  < 0.095
X1 + X2

where X1 and X2 are the average mR/mAs values obtained at each of two consecutive
tube current settings.

PEAK TUBE POTENTIAL

 
The maximum deviation of the peak tube potential from its preindicated value, during an
exposure, when the equipment is connected to an adequate power supply (see section
IIA) shall not exceed + 19% of full scale value within the range of 40-125 kVp.

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TUBE CURRENT
 
The maximum deviation of the tube current from its preindicated value, during an
exposure, when the equipment is connected to an adequate power supply (see section
IIA) shall not exceed +9% of selected tube current within the range of 50-125 kVp
(inclusive), and +19% of selected tube current within the range of 40-50 kVp (exclusive).

EXPOSURE TIME
 
The maximum deviation of the exposure time from its preindicated value, during an
exposure, when the equipment is connected to an adequate power supply (see section
IIA) shall not exceed +0 pulses within the range of 1/120-1/10 (inclusive) +14% of
selected time within the range of 3/20-6 seconds (inclusive).

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I. ANCHORING CONTROL CABINET TO THE FLOOR

 
It is necessary, in order to meet regulations set forth by Underwriters Laboratories, to
anchor the control cabinet to the floor. A 3/8 diameter hole is located centered in the
bottom panel to accept an anchoring screw. See figure below. Select a fastener suited
to the floor construction and condition; the finished installation must withstand a pull-out
force of 440lbs to meet the test loading specified by U.L. When installing the anchor
bolt into concrete floors use an expanding metal bushing, rather than one of the plastic
or fiber sleeves. In wooden floors use a single lag screw only where the floor is known
to be structurally sound. In wooden floors where the screw-holding strength is
questionable make a mounting plate of ¾ inch plywood, approximately 8” square, and
with a “T-nut” located at the center. Attach the plate to the floor with several lag screws,
and anchor the cabinet to the plate with a single machine screw. A space, 13/16-inch
high, exists between the floor and the cabinet bottom panel to clear a ¾” plywood plate.
See figure.
REMOVE HOLE PLUG

ANCHORING SCREW

PLYWOOD PLATE

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02255-000: kV Tap Switch  A367: Milliampre Meter  325 HE73: RED LIGHT, 

 A312: Knob without Pointer   00312-000: mAs Display  TUBE LIMIT 
    B697:
(Same for Major and Minor) RED LED Replacement  
Milliampre Meter  360 

01376-000: Kit,
Kilovolt Meter

01381-000:
Replacement HG11: GREEN,
Instructions Ready Light

 A310: SWITCH,
 A365: ON/OFF Time Select 325 
Circuit Breaker
C083:  SWITCH,
Time Select 360 
HG11: GREEN
Power Indicator  A311: KNOB,
(same as Ready) With Pointer

 A364:  A361: SWITCH,

SWITCH  
Bucky Selector  Expsure, 2-Position 

 A363: SWITCH,  A363: SWITCH,  B642: SWITCH, mA Selector 325

Line Check Line Compensation B932:  SWITCH, mA Selector 360 

1:02 PM 12/26/2006

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F280, B300, K240, 01200

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01204

 G

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1/4 WT
RESISTOR
SIZE
JUMPER

mA Station
J4
Pin For For
325 360
Gens Gens
1 200S 24S
2 X X
3 5VDC 5VDC
4 300L 300L
5 200L 240L
6 150L 120S
7 100S 360L
88 50S 48S

Schematic for Timer/Driver PCBA (Summit Part No. 02249-003 Rev. C)

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Component Layout for Timer/Driver PCBA (Summit Part No. 02249-002 Rev. C)

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