Bowles UW-7 User manual

Bowles Corporation
UW-7 Ultrasound Wattmeter
User Manual
Rev –04/27/18

Bowles Corporation UW 7
Bowles Corporation
445 Long Point Road, N. Ferrisburgh, VT 05473
www.BowlesCorp.com 802-425-3447
Manual P/N 3009

Bowles Corporation UW 7
Bowles Corporation
445 Long Point Road, N. Ferrisburgh, VT 05473
www.BowlesCorp.com 802-425-3447
Contents
WARRANTY....................................................................................................................1
NOTICES .......................................................................................................................2
SAFETY CONSIDERATIONS ..............................................................................................4
HAZARD WARNINGS .......................................................................................................5
PRECAUTIONS................................................................................................................5
ELECTROMAGNETIC INTERFERENCE AND SUSCEPTIBILITY..................................................6
EC DIRECTIVE 73/23/EEC LOW VOLTAGE (USER SAFETY)...............................................7
CHAPTER 1: GENERAL INFORMATION............................................................................... 9
SUMMARY OF FEATURES...............................................................................................10
ULTRASOUND AND ITS APPLICATIONS ............................................................................11
PATIENT TREATMENT WITH THERAPEUTIC ULTRASOUND..................................................12
CHAPTER 2: DESCRIPTION................................................................................................... 13
UW-7 SPECIFICATIONS.................................................................................................14
OVERALL UNIT LAYOUT ................................................................................................15
FRONT PANEL DESCRIPTION .........................................................................................16
BACK PANEL DESCRIPTION ...........................................................................................17
BOTTOM PANEL DESCRIPTION.......................................................................................18
STANDARD ACCESSORIES.............................................................................................18
OPTIONAL ACCESSORIES..............................................................................................20
CHAPTER 3: INSTALLATION & THE OPERATING ENVIRONMENT............................ 21
UNPACKING AND INSPECTION ........................................................................................22
OPERATION .................................................................................................................25
UW-7 SYSTEMS CHECK ...............................................................................................27
BEGINNING ULTRASOUND POWER MEASUREMENTS ........................................................29
USING THE UNIVERSAL TRANSDUCER CLAMP ASSEMBLY AND CENTERING RINGS..............31
ULTRASOUND UNIT TESTING .........................................................................................33
USING THE RS232 PORT..............................................................................................34
CHAPTER 4: SAFETY, MAINTENANCE, STORAGE & SHIPPING................................... 35
RECOMMENDED PROCEDURES AND PRECAUTIONS..........................................................36
CALIBRATION WEIGHT CHECK PROCEDURES..................................................................36
MAINTENANCE .............................................................................................................37
SERVICE......................................................................................................................37
RETURNING THE UW-7 FOR RECALIBRATION..................................................................38
USING BATTERY POWER MODULE .................................................................................38
STORAGE ....................................................................................................................39
REPACKAGING AND SHIPPING........................................................................................39
APPENDIX A: TROUBLESHOOTING GUIDE....................................................................... 43
RETURN MATERIALS AUTHORIZATION FORM ............................................................... 47

Bowles Corporation UW 7
Bowles Corporation
445 Long Point Road, N. Ferrisburgh, VT 05473
www.BowlesCorp.com 802-425-3447

Bowles Corporation UW 7
1
Warranty
Bowles Corporation (Bowles) warrants the UW-7 against defects in materials and
workmanship for one year from the date of original purchase. The standard warranty is
extended for a second year if the instrument is returned to Bowles for its recommended
yearly recalibration. Recalibration is not covered under the warranty.
During the warranty period, we will repair or, at our option, replace at no charge a
product that proves to be defective, provided you return the product in its custom
shipping box and with shipping prepaid to Bowles Corporation.
Only serialized products are covered under this warranty.
The warranty may become void if:
You elect to have the unit serviced or “calibrated” by someone other than
Bowles.
The tamper-resistant Quality Seal and/or the serial number tag is removed
or broken without proper factory authorization.
the product has been damaged by accident or misuse or as the result of:
Service or modification by other than Bowles.
Shipping the product without adherence to the procedures found on page 39
of this manual.
Shipping the product in packaging other than the original custom shipping
box and foam set.
Bowles reserves the right to discontinue the UW-7 at any time, and change its
specifications, price, or design without notice and without incurring any obligation.
Bowles does not guarantee availability of service and service parts after the manufacture
of the unit is discontinued, but will do its utmost to service the product for five years
following discontinuation.
The purchaser assumes all liability for any damages or bodily injury, which may result
from the use or misuse of the unit by the purchaser, his employees, agents, or customers.
In no event shall Bowles Corporation be liable for consequential
damages.

Bowles Corporation UW 7
2
Notices
Copyright
Copyright © 2018 by Bowles Corporation. All rights reserved. No part of this
publication may be reproduced or transmitted in any form other than for the purchaser’s
personal use without written permission from Bowles Corporation.
Certification
This instrument was thoroughly tested and inspected. Calibration measurements are
traceable to the National Institute of Standards and Technology (NIST). Devices for
which there are no NIST calibration standards are measured against in-house
performance standards using accepted test procedures.
Trademarks
Bowles and UW-7 are trademarks of Bowles Corporation. Any other trademark names
used in this manual are only for editorial purposes and the benefit of the respective
trademark owner with no intention of improperly using that trademark.
Refunds and Credits
Only products returned within 90 days from the date of original purchase are eligible for
refund/credit. A restocking charge will be applied to anyreturns (see below).
In order to receive a refund/credit of a product’s purchase price, the product must not have
been damaged bythe customer or bythe carrier chosen by the customer to return the goods,
and the product must be returned complete (meaning with all manuals, cables, accessories,
etc.) and in “as new” and resalable condition, and must be returned properly packed in the
original shipping container.
Products not returned within 90 days of purchase, or products, which are not in “as new”, and
resalable condition, are not eligible for credit return and will be returned to the customer. The
Return Procedure (see below) must be followed to assure prompt refund/credit.

Bowles Corporation UW 7
3
Restocking Charges
Products returned within 30 days of original purchase are subject to a minimum
restocking fee of 10 %. Products returned in excess of 30 days after purchase, but prior
to 90 days, are subject to a minimum restocking fee of 15 %. Additional charges for
damaged and/or missing parts, including the custom box set, and accessories will be applied to
all returns.
Return Procedure
A Return Material Authorization (RMA) number must be obtained from Bowles
Corporation customer service at 802-425-3447, before a product is returned for any
reason, including yearly calibration. The RMA form found on page 47 must be filled out
and included with the product. The RMA number should be clearly marked on the
outside of the package.
All items being returned (including all warranty-claim shipments) must be sent freight-
prepaid to our factory location. When you return an instrument to Bowles, we
recommend using United Parcel Service, Federal Express, or Air Parcel Post. We also
recommend that you insure your shipment for its actual replacement cost. Bowles
Corporation will not be responsible for lost shipments or instruments that are received in
damaged condition due to improper packaging or handling. We recommend that you use
the original carton and packaging material for shipment. If they are not available, contact
Bowles for replacement packing. See the repackaging and shipping instructions on
page 39 for the proper procedure to avoid damage to the unit in transit.
Returns should be shipped to this address:
Bowles Corporation
445 Long Point Road
N. Ferrisburgh, VT 05473
T: 802-425-3447
Email: [email protected]

Bowles Corporation UW 7
4
Safety Considerations
Use of this instrument is restricted to qualified personnel who recognize shock hazards
and are familiar with safety precautions used when operating electrical equipment. Read
the manual carefully before operating the UW-7.
The following warning symbols may be found on the UW-7:
Symbol
Description
Caution: Risk of electric
shock
Caution: Refer to
documentation
Power Off (Mains)
Power On (Mains)
DC/AC
DC
AC
Earth (Ground)

Bowles Corporation UW 7
5
Hazard Warnings
Warning! Power Rating. The UW-7’s main power input must be connected to
an external power transformer that provides voltage and current within the specified
rating for the system.
Use of an incompatible power transformer may produce electrical shock and
fire hazards. See Specifications and Optional Accessories in Chapter 2.
Warning! Internal Voltage. Always turn off the power switch and unplug the
power cord before cleaning the UW-7’s outer surface.
Warning! Liquids. Avoid spilling liquids on the digital scale; fluid seepage into
internal components creates a potential shock hazard. Do not operate the
instrument if internal components are exposed to fluid. Use a soft cloth to wipe
off any spilled water.
* Warning! Unauthorized user modifications or application beyond the
published specifications may result in electrical shock hazards or improper
operation. Bowles Corporation will not be responsible for any injuries
sustained due to unauthorized equipment modifications.
* Warning! Changes or modifications to this unit not expressly approved by the
manufacturer could void the user's authority to operate the equipment.
Precautions
The following precautions are provided to help you avoid damaging the system or
creating inaccurate readings:
Caution: Service. Authorized service personnel should service the UW-7. Only
qualified technical personnel should perform troubleshooting and service procedures on
internal components.
Caution: Environmental Conditions. Do not expose the system to temperature
extremes during operation. Storage ambient temperatures should remain between 10 -
35C (50-95° F). System operation should be at approximately 21 c (70 F) performance
may be adversely affected if temperatures fluctuate above or below this range. Allow 45
minutes for unit to reach room temperature.
Caution: Use of cell phones in close proximity to the unit may cause readings to
vary slightly.
Caution: Do Not Immerse. Clean only with a mild detergent, and wipe down with
a gentle cloth.

Bowles Corporation UW 7
6
Electromagnetic Interference and Susceptibility
USA FCC CLASS A
Warning: Changes or modifications to this unit not expressly approved by the
manufacturer could void the user's authority to operate the equipment. This equipment
has been tested and found to comply with the limits for a Class A digital device, pursuant
to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial
environment. Like all similar equipment, this equipment generates, uses, and can radiate
radio frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause interference, in which case the user will
be required to correct the interference at his/her own expense.
Canadian Department of Communications Class A
This digital apparatus does not exceed Class A limits for radio emissions from digital
apparatus set out in the Radio Interference Regulations of the Canadian Department of
Communications.
Emissions - CLASS A
The system has been type tested by an independent, accredited testing laboratory and
found to meet the requirements of EN 61326-1:1998 for Radiated Emissions and Line
Conducted emissions. Verification of compliance was conducted to the limits and
methods of the following:
CISPR 16-1:1993 and CISPR 16-2:1996
Immunity
The system has been type tested by an independent, accredited testing laboratory and
found to meet the latest harmonized European emissions and immunity standard
requirements of EN 61326 for commercial measurement equipment. Verification of
compliance was conducted to the limits and methods of the following:
EN 61326-1 IAW EN 61000-4-2 Electrostatic Discharge
EN 61326-1 IAW EN 61000-4-3 Annex D Radiated & Conducted EM
EN 61326-1 IAW EN 61000-4-4 Electrical Fast Transient/Burst
EN 61326-1 IAW EN 61000-4-5 Surge Immunity
EN 61326-1 IAW EN 61000-4-6 Conducted Disturbances
EN 61326-1 IAW EN 61000-4-11 Voltage Interrupts

Bowles Corporation UW 7
7
EC Directive 73/23/EEC Low Voltage (User Safety)
The system has been type tested by an independent testing laboratory and found to meet
the requirements of EC Directive 73/23/EEC for Low Voltage. Verification of
compliance was conducted to the limits and methods of the following:
EN 61010-1
“Safety Requirements for Electrical Equipment for Measurement, Control and Laboratory
Use, Part 1: General requirements” (including amendments 1 & 2).

Bowles Corporation UW 7
8

Bowles Corporation UW 7
9
1
Chapter 1: General Information
Inside This Chapter
Summary of Features
Ultrasound and its Applications
Patient Treatment with Therapeutic Ultrasound

Bowles Corporation UW 7
10
Summary of Features
The UW-7 digital Ultrasound Wattmeter provides an accurate means of verifying and
calibrating the output of therapeutic ultrasound devices. The instrument measures
output through a strain gauge bridge transducer. The UW-7:
Has a resolution of 0.01 Watt and a repeatability of -3%
of readings .02 watts from 0 - 30 W
Maintains electrical accuracy of .01 grams throughout
range;
Features a large, backlit, easy to read display that enables
the user to quickly and accurately make power
measurements;
1.5 sec electrical readout response time for fast
measurements. Ultrasound readings will take 4-5 seconds.
Can accommodate a variety of transducer shapes and sizes
without interfering with the measurement;
The UW 7 is provided with a 140-ml piston syringe for
draining the tank. Under no circumstances should the water
be poured out of the tank by tipping the unit on its side.
Always use the syringe for convenient and controlled
drainage of the tank. Once the tank is emptied use a soft
cloth towel or sponge to wipe tank fully dehydrated.
NEVER use paper towels for this purpose since this will
leave small fibers that will degrade the accuracy of the
readings.
Measures total-pulsed or continuous-average power.
Has a selectable readout in grams or watts.
Unit is line-powered by a 120 VAC or 240 VAC
transformer for normal testing. For portable operation an
optional Li Ion battery module is available.
Has a USB or RS232 interface cable option
Includes a field functional check weight.
Is housed in a sturdy case.
Is ruggedly built for portable use to meet the needs of
service groups and biomedical engineers.
Comes with a soft carrying case as a standard accessory for
ease of transporting and storage.

Bowles Corporation UW 7
11
Ultrasound and Its Applications
Human perception of sound waves is limited to frequencies of fewer than 20,000
vibrations per second. Higher frequency vibrations —between 0.7 and 3.3 MHz —
are used for ultrasound therapy. (Most ultrasound equipment produces an output of
between 1 and 3.3 MHz.)
An ultrasound unit produces electrical oscillations at a specified frequency that cause
the transducer in the ultrasound applicator to generate sound waves. The resulting
ultrasonic radiation is transmitted from the ultrasound applicator, or treatment head,
through a coupling medium, to the patient’s tissue.
Therapeutic Use of Ultrasound
The therapeutic use of ultrasonic energy is accepted worldwide, and most modern
hospitals and clinics have ultrasound devices in their physical therapy
departments.
Ultrasound therapy is primarily used in the treatment of sports-related injuries.
Another common use is the treatment of circulatory disorders and rheumatic
diseases of the musculoskeletal system and peripheral nerves. Ultrasound has
been found to be extremely effective in treating body areas with a great deal of
scar tissue.
Physiological Effects of Ultrasound Therapy
It is well documented that ultrasound therapy heals because of thermal,
mechanical, and chemical effects. *
Thermal effects include deep tissue heating at depths to 5 cm or more. The ther-
mal effects of ultrasound differ from diathermy (the use of electrical impulses to
produce generalized vasodilation) in that the ultrasound beam heats only a small
tissue area that approximates the cross-section of the beam. This heating effect is
concentrated in muscles, ligaments, nerves, bones, and where the ultrasound beam
crosses from one type of tissue to another.
The mechanical effects are best described as micro massage, a deep stirring action
within the tissue. The benefit of this action is an increased circulation to the
damaged tissue. In addition, ultrasound is capable of separating collagen fibers
from one another and of changing the tensile strength of tendons, thereby
increasing their extensibility.
* Physical Agents for Physical Therapists, Second Edition, James E. Griffin and Terence Karselis, Charles C. Thomas
Publishing Co., 1992.

Bowles Corporation UW 7
12
The physiological benefits from ultrasound therapy are numerous. Ultrasound
therapy affects the peripheral nerves by chemically changing the conduction
velocity (this has been shown clinically in situ). Ultrasound alters the diffusion of
Na+ and K+ (sodium and potassium) across red blood cell membranes.
Ultrasound can also remove some salt deposits from irritated tissues.
Patient Treatment with Therapeutic Ultrasound
The clinician working with ultrasound can ensure successful ultrasound treatment by
assessing:
the physical condition of the patient,
the absorption coefficient of the tissue(s),
the energy output of the ultrasound unit (continuous and pulsed),
the massivity and location of the affected tissue, and
the spread pattern of the beam.
The most essential assurance that the clinician can have is the verification that the
ultrasound unit is producing the ultrasound energy for which it was designed. The
Bowles UW-7 digital power meter enables the clinician to accurately measure this
output energy.

Bowles Corporation UW 7
13
2
Chapter 2: Description
Inside This Chapter
Specifications
Overall Unit Layout
Front Panel Description
Back Panel Description
Standard Accessories
Optional Accessories

Bowles Corporation UW 7
14
UW-7 Specifications
Measurement range 0.01 - 30 Watts
Input Power Level 0 - 30 W
Input Frequency 0.5 - 10 MHz
Resolution 0.01 W
Accuracy, electrical +/- .15 W (+/-.01 grams)
throughout range
Repeatability 3% of reading .2 watts
Zero Shift Auto Zero button
Acceptable Transducer Size up to 6.7 cm (2.65") diameter
Operating Temperature 10° - 30° C (50° - 86° F)
AC Power Requirements Use the transformer provided.
Battery power 14 –18 VDC Use only the LI battery power module.
Battery Life Maximum of 36 hours
Note: Unit will not auto shut down on battery power.
Height 6 ½” (11.5” with Clamp Post)
Enclosure ABS ®with internal die cast metal sensor support base

Bowles Corporation UW 7
15
Overall Unit Layout
Figure 2-1: UW 6 General Layout
The top of the UW-7 Ultrasound wattmeter is shown in Figure 2-1. It includes
the following components.
Front Panel: Includes LCD readout and keyboard.
Rear Panel: Includes Battery compartment, RS-232 Connector and
Power Transformer Jack.
Sound Tank: To be filled with 420 ml 10 ml of degassed and
distilled water for each use.
Transducer Cone: The cone is removable for safe transporting.
Leveling Bubble: Used to help level the unit before turning it on.
Cone Hanger: Suspends the cone in the sound tank from the load cell
mounts during readings.
Cone Hanger Mounts: Connect the cone hanger and cone with the
unit’s load cell during readings.
Universal Transducer Clamp Support Post: A removable, vertically
mounted bar to which the transducer clamp may be attached.
Leveling
Bubble
Overflow Drain
Notch
Transducer Cone
Front Panel
Acoustic Sensor
Tank
Cone Hanger Mounts
Rear Water
Splash Guard
Clamp
Support Post
Cone Hanger

Bowles Corporation UW 7
16
Front Panel Description
Figure 2-2: UW-7 Front Panel Layout
The front panel of the UW-7 ultrasound wattmeter is shown in Figure 2-2. It
includes the following components:
LCD Display: Indicates the meter reading in watts or grams.
Power On/Off Switch: Turns the unit on and off.
Auto Zero Button: Adjusts the LCD display to 0.00 watts or 0.00
grams depending on the mode selected.
WATT/GRAM button: Switches the mode from watts to grams and
back.
Print Button: Sends the text on screen to the RS-232 or USB port for
printing or recording.
Leveling Bubble: For leveling unit.