Aseptico ARU-HF70 Maintenance manual

P.O. Box 1548 Woodinville, WA 98072-1548

1-800-426-5913 * 425-487-3157 * Fax: [phone]

email: [e-mail] * Internet: www.aseptico.com

P/N 420310
Rev. A
04/01

OPERATION AND

MAINTENANCE MANUAL

ARU-HF70D

NSN: Pending

Page 2

Table of Contents

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Performance Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Items Furnished . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Performance Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Exposure Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Peak Tube Potential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Tube Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Testing Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Operation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Component Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-16

Technique Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Table of Illustrations

Figure A - Component Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Figure B - Tripod Attachment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Figure C - PC Board M3115 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Figure D - PC Board M9142 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Figure E - Cord Attachments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Figure F - Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Chart A - Testing Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Figure G - Absolute Maximum Rating Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Figure H - Emission and Filament Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Figure I - Anode Thermal Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Figure J - D -0811 Dimensional Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Figure K - D -0811S Dimensional Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Figure L - Schematic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Upon Arrival

When the equipment is received, each shipping container should be carefully examined for any
evidence of mishandling during shipment. Note its condition, if abnormal, carefully unpack all
parts and examine for damage. If any damage is noted, immediately report it to the carrier in the
proper manner. All printed matter supplied with the unit should be saved for installation,
operation, and future reference.

Page 3

Introduction

Purpose

The ARU-HF70D Command Air X-ray System is a mono-block type high frequency portable
dental x-ray unit. This system is compatible with conventional intraoral dental film or with solid­state digital radiographic intraoral sensors and provides a portable and practical way to obtain
dental radiographs in the field. To receive the best service and longest life from your Aseptico
product, follow the instructions detailed in this manual.

Performance characteristics

Unit Weight: 9.25 lbs. (4.2 kgs.)
Unit Dimensions: 8.25”W x 6”H x 10.75”L, plus dental cone

(10.2 cm x 15.2 cm x 20.3 cm)
X-ray Output: 10 mA @ 60, 65, 70 kVDC
Exposure timer: 0.02 - 1.98 seconds, 99 steps
Line Voltage: 110-130V, 50/60 Hz

220-260V, 50/60 Hz
Generator Rating: 10 mA at 70 kVDC ±15%
Current Draw @ 10 mA, 70 kVDC output: 15 Amps
Inverter Frequency: 75 kHz
Maximum Deviation from Fixed Factor: ±10% (mA), ±10% (kV),

±20% (Time: 0.02-0.20 sec.),

±10% (Time: 0.22-1.98 sec.)
X-ray tube: Toshiba D-0811 or equivalent
Focal Spot: 0.8 mm
Exposure Switch: Two-stage, deadman with RJ11 connector
Exposure Cord: 8 feet (2.8 m)
Power cord: 20 feet (6.1 m), 14/3 wire oil resistant
Dental Cone (Beam Limiting Device) Yoshida BL -70 or equivalent
Focus to Cone Tip Distance: 7.95” (20.2 cm)

Items furnished

X-ray tubehead and control
Mounting handle
Dental cone
Scatter shield
Exposure cord
Power cord
Mil-spec case with shock resistant foam insert
ARU-01S tripod
Vinyl carrying case for tripod
Manual

Page 4

Safety Precautions

WARNING - Careless or improper use of x-ray equipment can be extremely hazardous.
WARNING - It is imperative that this equipment be operated and serviced only by trained

personnel familiar with the safety precautions required to prevent excessive exposure
to primary x-ray radiation, the dangers of exposure to x-ray radiation, and the proper
use of the equipment discussed in this manual.

I. During exposure, the operator must stand as far as possible from the patient being x-

rayed and should wear a lead apron or stand behind a lead shield.

II. The operator must not stand in the primary x-ray beam.
III. The operator must wear a monitoring badge while operating this unit. It should be on the

collar, not on an area covered by the lead apron.

IV. X-ray exposure should be as short as possible.

All personnel authorized to operate or service this equipment should be fully acquainted with the
established maximum permissible doses, safety recommendations, and procedures derived from
the following sources:

A. National Council on Radiation Protection Report No. 33 (Medical X-ray and Gamma Ray

Protection for Energies up to 10 MEV - Equipment Design and Use); from NCRP
Publications; P.O. Box 30175, Washington, D.C. 20014.

B. National Bureau of Standards Handbook No. 76 (Medical X-ray Protection up to Three

Million Volts); from the Superintendent of Documents, Government Printing Office,
Washington, D.C. 20401.

C. All documents relating to the Performance Standard for Diagnostic X-ray Systems, 21

CFR Subchapter J, Part 1020; obtainable from FDA Center for Devices and Radiological
Health, Department of HHS, 2098 Gaither Road, Rockville, MD 20850.

D. State and local regulations governing radiation protection and the use of diagnostic x-ray

equipment.

E. Requirements of the user's in-house radiation protection program.
F. Instructions and precautionary notices of this manual.

Although this equipment incorporates protective design features for limiting both the direct
(primary) x-ray beam and the secondary radiation produced by this beam, design factors alone
cannot prevent human carelessness, negligence, or lack of knowledge. This apparatus is sold with
the understanding that the user assumes sole responsibility for radiation safety and that MinXray,
Inc. (the manufacturer) and Aseptico, Inc. (the distributor), its agent and representatives, do not
accept any responsibility for:

1. Injury or danger to patient or other personnel from x-ray exposure.

2. Overexposure due to poor operating techniques or procedures.

3. Equipment not properly serviced or maintained in accordance with this manual.

4. Equipment which has been modified or tampered with in any way.

5. Equipment that has been connected to input voltage other than the voltage specified
on the rating label affixed to the x-ray unit.

Page 5

X-ray tubehead and control
Mounting handle
Dental cone
Scatter shield
Exposure cord
Power cord
ARU-01S tripod

Includes:
#510311 5/16 - 18 wing-nut
#510322 5/16 fender washer

Vinyl carrying case
Mil-spec case with shock

resistant foam insert

1

2

3

4

1

2

3

4

Figure A - Component Identification

Assembly

1. Remove the ARU-HF70D x-ray tubehead and control, dental cone, scatter shield, exposure
cord, and power cord from the carrying case. (See Fig. A above)

2. If the ARU-HF70D will be attached to the ARU-01S tripod:
A. Remove the tripod from its vinyl carrying case.
B. Rotate the carrying handle of the ARU-HF70D around the

rear of the unit so it is positioned under the unit.

C. Insert the threaded stud on the tripod center post through

the hole in the center of the ARU-HF70D carrying handle.
D. Place the washer over the carrying handle on the threaded stud.
E. Affix the ARU-HF70D to the tripod by screwing the wing-nut

onto the threaded stud. (See Fig. B at right)
F. Adjust the length of each telescoping tripod leg and lock it.
G. Adjust the height of the center post and lock it.

3. Carefully screw the dental cone into the coneholder on the front of the ARU-HF70D. Avoid
crossthreading the cone when attaching it to the unit.to prevent leakage radiation and distortion
of the x-ray field. NEVER OPERATE THE ARU-HF70D UNLESS THE DENTAL CONE IS

ATTACHED.

4. Connect the leaded scatter shield to the end of the dental cone. The scatter shield should be
used if the ARU-HF70D is to be configured for handheld operation.

5. Connect the AC power cord to the socket on the back of the ARU-HF70D. Note the rated
voltage of the unit before connecting it to a power source

6. Connect the exposure cord to the RJ11 telephone-type socket on the back of the ARU-HF70D.

7. Plug the AC power cord into a grounded wall outlet.
The unit is now assembled and ready for testing.

5

6

7

8

5

6

7

8

9

9

Figure B - Tripod Attachment

Page 6

Performance Verification

The following tests must be conducted without fail before the ARU-HF70D Command Air X-Ray
System can be used for radiology. Fill out the checklist for these tests when installation of x-ray
unit is complete.

1. Exposure Timer

1-1 Test method:

1. Set the exposure timer to 0.02 seconds.

2. Set output to 70 kV.

3. Set NERO to the following settings:
SID: 18 inches; Wheel range: 50 ~ 85 kV; Sensitivity: L ow; Phase select: 1Ø;

Measurement mode: STAT; X-ray values: 70 kV, 0.02 seconds.

4. Make exposure and read the measured value of exposure time on the NERO.

5. Measure value of exposure time at the following settings with the same procedure:

0.02, 0.04, 0.10, 0.20, 0.50, and 1.00 seconds.

1-2 Instruments: NERO Model 6000M X-ray Beam Analyzer

Manufactured by Victoreen, Inc. or equivalent

1-3 Rejection limit: ±20% (0.02 sec. ~ 0.2 sec.), ±10% (0.22 sec. ~ 1.98 sec.)

If the timer needs adjustment:

1. Remove the 4 screws on the side of the top cover of the ARU-HF70D
and lift the top off of the body of the unit.

2. Adjust the potentiometer “VR1” on the printed circuit board M3115 on the inside
of the top cover (see Fig. C below) so that the radiation exposure time equals the
indicated time value, taking into consideration the accuracy tolerances.

3. Replace the top cover and the 4 screws.

Figure C - PC Board M3115. Exposure Timer Adjustment (VR 1)

VR 1