Ohmic UPM-DT-50SP User manual

DIGITAL
ULTRASOUND
WATTMETER
UPM-DT-50SP
USER MANUAL

i
CALIBRATION INTERVAL, WARNINGS, CAUTIONS, NOTICES...........................................................i
INTRODUCTION.................................................................................................................................................... 1
TEST SETUP........................................................................................................................................................... 2
METER LAYOUT.................................................................................................................................................... 7
TESTING................................................................................................................................................................... 9
PRINTING AND COMMUNICATIONS...........................................................................................................10
TROUBLESHOOTING........................................................................................................................................11
MANUAL REVISIONS.........................................................................................................................................12
LIMITED WARRANTY.........................................................................................................................................12
SPECIFICATIONS................................................................................................................................................13
NOTES.....................................................................................................................................................................14
UPM-DT-50SP ULTRASOUND WATTMETER
TABLE OF CONTENTS
WARNING - USERS
The UPM-DT-50SP is for use by
skilled technical personnel only.
CALIBRATION INTERVAL
To ensure the accuracy of the UPM-DT-50SP,
Ohmic Instruments recommends that it be
calibrated at least once every 12 months.
Calibration must be done by qualified personnel.
Contact Ohmic Instruments for calibration.

ii
CAUTION - SERVICE
The UPM-DT-50SP is intended to be serviced
only by authorized service personnel.
Troubleshooting and service procedures should
only be performed by qualified technical
personnel.
WARNING - USE
The UPM-DT-50SP is intended for testing only
and should never be used in diagnostics,
treatment or any other capacity where it would
come in contact with a patient.
CAUTION - MODIFICATIONS
The UPM-DT-50SP is intended for use within the
published specifications. Any application
beyond these specifications or any unauthorized
user modifications may result in hazards or
improper operation.
CAUTION - INSPECTION
Inspect the UPM-DT-50SP before each use for
wear. It should be serviced if any parts are in
question.
CAUTION - ENVIRONMENT
Exposure to environmental conditions outside
the specifications can adversely affect the
performance and accuracy of the UPM-DT-50SP.
If the unit is outside the Operating
Specifications, allow it to acclimate to specified
conditions for at least 30 minutes before
attempting to operate it.

iii
CAUTION - CLEANING
Do not immerse. UPM-DT-50SP should be
cleaned by wiping gently with a damp, lint-free
cloth. A mild detergent can be used if desired.
NOTICE – ABBREVIATIONS
C
Celsius
°
degree
DUT
Device Under Test
F
Fahrenheit
g
gram(s)
IEC
International Electrotechnical Commission
kg
kilogram(s)
MHz
Megahertz
mm
millimeter(s)
mW
milliwatt(s)
PPM
Parts Per Million
Lbs
pounds
USA
United States of America
V
Volt(s)
VAC
Volt(s) Alternating Current
VDC
Volt(s) Direct Current
W
Watt(s)
CAUTION - LIQUIDS
Do not submerge or spill liquids on the
UPM-DT-50SP. Do not operate the
UPM-DT-50SP if internal components not intended
for use with fluids may have been exposed to
fluid, as the internal leakage may have caused
corrosion and be a potential hazard.
NOTICE – SYMBOLS
Symbol
Description
Per European Council Directive
2002/95/EC, do not dispose of this
product as unsorted municipal waste.

iv
UPM-DT-50SP User Manual Copyright © 2017
www.ohmicinstruments.com Made in the USA
08/17 Rev 01
NOTICE – DISCLAIMER
OHMIC INSTRUMENTS WILL NOT BE RESPONSIBLE FOR ANY
INJURIES SUSTAINED DUE TO UNAUTHORIZED EQUIPMENT
MODIFICATIONS OR APPLICATION OF EQUIPMENT OUTSIDE
OF THE PUBLISHED INTENDED USE AND SPECIFICATIONS.
NOTICE – DISCLAIMER
OHMIC INSTRUMENTS RESERVES THE RIGHT TO MAKE
CHANGES TO ITS PRODUCTS OR SPECIFICATIONS AT ANY
TIME, WITHOUT NOTICE, IN ORDER TO IMPROVE THE DESIGN
OR PERFORMANCE AND TO SUPPLY THE BEST POSSIBLE
PRODUCT. THE INFORMATION IN THIS MANUAL HAS BEEN
CAREFULLY CHECKED AND IS BELIEVED TO BE ACCURATE.
HOWEVER, NO RESPONSIBILITY IS ASSUMED FOR
INACCURACIES.
NOTICE – CONTACT INFORMATION
OHMIC INSTRUMENTS
3081 ELM POINT INDUSTRIAL DR.
SAINT CHARLES, MO 63301
USA
410-820-5111
www.ohmicinstruments.com
[e-mail]

1
The Model UPM-DT-50SP Ultrasound Power Meter is designed to measure the ultrasonic
power output of diagnostic or therapeutic transducers up to 30 Watts. The principle of
measurement is the radiant force method. The UPM-DT-50SP uses a positioning clamp
to hold the transducer in degassed water above a conical target. The ultrasonic energy
passes through the water to reflect off the target and is then absorbedby the rubber lining.
The radiant power is directly proportional to the total downward force (weight) on the
target. This force is then transferred through the target support assembly to the electro-
mechanical load cell inside the scale. The cell is in a computer-controlled feedback loop
and produces a digital readout; Watts of power (custom units) or grams of force. The
choice of units (Watts or grams) is selected by front panel pushbuttons.
INTRODUCTION

2
Water as a Measurement Medium*
Ultrasound propagation in water closely approximates ultrasound propagation in tissue.
Large areas in thebodycan consist of lowattenuating material such as urine and amniotic
fluid. Other areas of the body, such as the liver, contain higher attenuating materials.
Water is used as a lower limit of the attenuation encountered in the body. This allows
measurements to represent the highest possible intensities that might be encountered in
the body. Degassed water is the widely accepted test medium for ultrasound transducers
(see AIUM/NEMA Standards Publication #UL-1-1981, SAFETY STANDARD FOR
DIAGNOSTIC ULTRASOUND EQUIPMENT).
Degassed Water
Ultrasound Power measurement accuracy is affected if the water contains more than
5-10 PPM of air. To degas, boil distilled water for 30 minutes, then seal the container
tightly and place it in a refrigerator. An alternate method of degassing water is to heat the
water to the boiling point, then pull a vacuum on it for five to ten minutes. The degassed
water storage container should be made of glass or plastic. Polystyrene containers should
not be used since they allow oxygen to permeate and degrade the water quality. Any
unsealed degassed water will absorb oxygen and affect measurement accuracy,
therefore a change of degassed water is recommended before each test. Water
temperature also affects accuracy. It is recommended to use an ambient testing
temperature of 24.0 ±3.0 °C (75.2 ±5.4 °F). Sonic energy agitates the water surface
through heating and scattering. Prolonged testing, particularly at higher power levels, will
show visible signs of air bubbles on the transducer, target, and tank lining. Replace the
tank’s degassed water before each test.
TEST SETUP

3
Conical Target Installation
Tilt the test tank and begin filling with degassed water creating a minimal amount of
turbulence. Fill the tank 1/4” from the top with fresh degassed water. Power on the
UPM-DT-50SP and allow the meter to zero (Note: A white LED light will illuminate near
the top right of the faceplate while the meter stabilizes). Submerge the conical target
into the degassed water at an angle to minimize disruption of the degassed water; See
Figure 1 for conical target assembly details. Remove the wetted conical target, then
lower the conical target support stem into the target support tube located behind the test
tank, while simultaneously placing the conical target into the tank; See Figure 2 for
details. As the conical target is submerged verify its surface is free of bubbles, including
the bottom surface. If bubbles exist gently wipe them away with your finger. Allow the
conical target support stem to lower completely. Gently tip the conical target assembly
back and forth and allow the target support stem to fully seat.
Figure 1. Conical Target Assembly
Target Support Stem
Target Support Arm
Conical Target

4
Figure 2. Conical Target Installation
Target Support Stem
of Conical Target
Assembly
Target Support Tube
UPM-DT-50SP
Test Tank

5
Transducer Placement
To place the transducer, tighten the positioning clamp jaws onto the transducer handle;
See Figure 3 for Positioning Clamp details. Loosen the two positioning clamp knuckles
and insert the transducer head into the degassed water at an angle to minimize disruption
of the degassed water. Verify that the transducer surface is uniformly wetted (no
bubbles). If it is not, gently wipe the surface clean using your finger. Position the
transducer head so it is directlyfacing the center of the conical target and submerged 1/8”
to 1/4” in the degassed water. Tighten the two positioning clamp knuckles to hold the
transducer in place; See Figure 4 for placement details. Small measurement variations
will occur due to placement of the transducer. Try various positions above the target to
achieve the best results.
Figure 3. Transducer Positioning Clamp Details
Positioning Clamp Jaws
Thumb Screws to tighten
the Positioning Clamp Jaws
Positioning Clamp Knuckles

6
Figure 4. Transducer Placement Details
Transducer Head Submerged
and Positioned Directly Over
the Conical Target.
Transducer Handle
Firmly Clamped in
Position.
Conical Target Assembly
Installed

7
Front
1. On/Zero - Off Button:
- Press to turn unit on or zero
- Press and hold until OFF is displayed then release to turn off.
2. Print - Unit Button:
- Press to print data via the RS232 port (see the Printing and
Communications section).
- Press and hold then release when desired unit is displayed.
“g” = grams
“c” = custom = Watts
3. Function - Mode Button:
- Press and hold to toggle measurement modes. Always use “Weigh” Mode.
4. Tare - Menu Button:
- Press to Tare the weight of the Conical Target Assembly
- Press and hold to access the settings menus.
5. 7 Segment, digital measurement display
6. Stability Indicator; Displays once the meter is stable and ready to take a measurement.
METER LAYOUT
2
6
5
1
4
3
White LED illuminates in
background after power
on, during stabilization.

8
Back
Bottom
Power Input Receptacle
(5VDC, 1 A)
Communications / Print
Port
Battery Compartment
(4 AA Batteries)

9
1. Place the UPM-DT-50SP on a stable and level surface. Avoid air currents and
vibrations.
2. Review and complete all steps outlined in the Test Setup section.
a. Degas Water
b. Fill the UPM-DT-50SP tank
c. Install the Conical Target
d. Position the DUT’s transducer
3. Allow the UPM-DT-50SP and tank water to stabilize. With no ultrasonic power
applied, press the Tare button to “Net” zero the meter.
4. Place the included 1 gram Standard Weight on the arm of the conical target
assembly (the flat part above the water). The UPM-DT-50SP should read 1.00 ±
0.10 grams.
5. Remove the 1 gram Standard Weight.
6. Select the desired test measurement unit. Allow the UPM-DT-50SP and tank
water to stabilize. With no ultrasonic power applied, press the Tare button to “Net”
zero the meter.
7. Test the DUT, averaging three measurements for the final recording.
a. Once the display’s stability indicators are shown, activate the DUT for
several seconds, allowing the measurement to stabilize, and record the
measurement.
b. Deactivate the DUT and allow all components to stabilize.
c. Tare the meter.
d. Repeat steps 7a, 7b, and 7c two times.
e. Average the three measurements for the final recording.
8. Refer to the DUT manufacturer for acceptable test limits.
9. After testing, unplug the UPM-DT-50SP, empty the tank, and place the dry conical
target assembly in the carry case for protection.
TESTING

10
Print Details
The print port option must be setup and installed by Ohmic Instruments. Contact Ohmic
Instruments for print option pricing.
Print Output Format: “0.000 g” (grams mode) or “0.00 custm” (custom Watts mode).
An unstable reading is indicated by a “?” at the end of the print line (i.e., 0.000 g ?).
Communication Commands
RS232 Communication Interface: Baud Rate = 9600, 8 Bit Data, No Parity, No Handshake
Note: The Communication Interface Requires an Interface Module. Contact Ohmic
Instruments for Interface Module pricing.
P
Print displayed weight (An unstable reading is followed by a “?”)
T
Tare
Z
Zero
PRINTING

11
Symptom
Possible Cause
Solution
The measurement fluctuates.
Unstable Environment
The meter is very sensitive
and is affected by minor air
drafts and/or vibrations.
Place the meter on a solid
surface and shield it from any
air drafts.
The measurement drifts over
a period of time.
The tank water has absorbed
too much air.
Replace the tank water with
fresh, room temperature
degassed water.
The conical target has
developed bubbles on its
surface.
Wipe any bubbles from the
surface of the conical target,
including the bottom.
The transducer head has
developed bubbles on its
surface.
Wipe any bubbles from the
surface of the transducer
head.
The meter will not zero / tare.
- Degassed water has
absorbed too much air.
- Requires Calibration and/or
Repair.
- Refill with fresh degassed
water.
- Contact Ohmic Instruments
for Calibration and/or
Repair.
After zeroing / taring, the
measurement continually
drifts with no transducer
power applied.
The meter does not respond
to the test weight and or
transducer power.
The Conical Target Assembly
and/or the Target Support
Tube is rubbing or binding
against its surrounding.
Verify the Conical Target
Assembly and its Support
Tube are correctly positioned.
Displayed Errors
Description
Possible Solution
Err 8.1
Load During Power On
Remove the conical target assembly and
cycle power.
Err 8.2
Weight Below Power On
Zero Range
Place the meter on a level surface and
cycle power.
Err 8.3
Over load
Remove any excess force on the meter.
Err 8.4
Under load
Place the meter on a level surface and
cycle power.
Err 8.5
Tare out of range
Remove any excess force on the meter.
If any error persists, contact Ohmic Instruments Sales or Service for repair
TROUBLESHOOTING

12
Revision # Revisions Made
Rev 00 Origination
Rev 01 Miscellaneous Updates
WARRANTY: OHMIC INSTRUMENTS WARRANTS ITS NEW PRODUCTS TO BE FREE FROM DEFECTS IN
MATERIALS AND WORKMANSHIP UNDER THE SERVICE FOR WHICH THEY ARE INTENDED. THIS
WARRANTY IS EFFECTIVE FOR TWELVE MONTHS FROM THE DATE OF SHIPMENT.
EXCLUSIONS: THIS WARRANTY IS IN LIEU OF ANY OTHER WARRANTY EXPRESSED OR IMPLIED,
INCLUDING, BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE.
OHMIC INSTRUMENTS IS NOT LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES.
NO PERSON OTHER THAN AN OFFICER IS AUTHORIZED TO GIVE ANY OTHER WARRANTY OR ASSUME
ANY LIABILITY.
REMEDIES: THE PURCHASER'S SOLE AND EXCLUSIVE REMEDY SHALL BE: (1) THE REPAIR OR
REPLACEMENT OF DEFECTIVE PARTS OR PRODUCTS, WITHOUT CHARGE. (2) AT THE OPTION OF
OHMIC INSTRUMENTS, THE REFUND OF THE PURCHASE PRICE.
LIMITED WARRANTY
MANUAL REVISIONS

13
ULTRASONIC POWER MEASUREMENT
POWER RANGE
0 to 30 W
RESOLUTION
±50 mW
MINIMUM DETECTABLE
POWER LEVEL
50 mW
ACCURACY
±3% + One Count Reading
DUT OPERATING
FREQUENCY
0.5 to 10 MHz
DUT MAXIMUM
TRANSDUCER SIZE
4.00 Inches (101.6 mm)
TEST MEDIUM
Degassed Water @ 24.0 ±3.0 °C (75.2 ±5.4 °F)
ELECTRICAL
BATTERY
Quantity 4, AA (IEC LR6) Alkaline
BATTERY ELIMINATOR
5 VDC, 1 A
PHYSICAL & ENVIRONMENTAL
DISPLAY
6-digit, Backlit LCD
CONSTRUCTION
TANK LINING
0.25 Inch (6.35 mm)
thick Neoprene
CARRYING CASE
Plastic
SIZE
OVERALL (Including case):
17 x 13 x 6 Inches
(432 x 330 x 153 mm)
WEIGHT
OVERALL (Including case):
< 10.0 Lbs (4.5 kg)
OPERATING RANGE
15 to 30 °C
(59 to 86 °F)
STORAGE RANGE
-40 to 60 °C
(-40 to 140 °F)
SPECIFICATIONS

13
NOTES