Dynatron® 850plus & 550plus
Ultrasound Technical Information
106
d. Select 10% Duty Cycle: With the 10% LED lighted, enter “0” (zero) as the value
for Coupling. The coupling detection feature is not available with old-style
soundheads.
6. Enter 3 MHz Values. Press the FREQ key to select 3 MHz. Make sure the 3 MHz LED
is lighted. Locate the 3 MHz column on the printout, and enter those numbers as follows:
a. Select CONT Duty Cycle
: The CONT and 3 MHz LEDs are lighted. Enter the
value for F1 – 3 MHz by pressing the time selection keys until the desired value
is displayed in the Time display.
b. Select 50% Duty Cycle
: With the 50% LED lighted, enter the value for
Z – 3 MHz.
c. Select 20% Duty Cycle
: With the 20% LED lighted, enter the value for
Temp – 3 MHz.
d. Select 10% Duty Cycle
: With the 10% LED lighted, enter “0” (zero) as the value
for Coupling. The coupling detection feature is not available with old-style
soundheads.
7. Store New Parameters. After you have entered all parameters, press START to store
them in the device’s memory. Then press STOP to exit this mode.
The above procedure must be performed for each separate soundhead for the device. Turn
the device off before attaching the next soundhead, then turn the device on again with the
soundhead firmly plugged in.
Calibration Procedure
New soundheads that accompany a new device are calibrated at the factory and do not require
calibration before initial use. However, new soundheads purchased separately to add to an
existing device may require re-calibration before use. Also, soundheads must be calibrated
with the device every six months to a year to ensure proper operation. The calibration
procedure is provided for use when recalibration is required. With the exception of
calibration, all service on the Dynatron 850plus device should be performed by a Dynatronics
service technician. If your Dynatron 850plus requires service, contact Dynatronics Customer
Service at (800) 874-6251. The calibration procedure MUST be performed by a
qualified ultrasound technician using the proper equipment. Calibration may be
performed either by Dynatronics or by an ultrasound technician in your local area.
When to Calibrate: Dynatronics recommends that the Dynatron 850plus be calibrated at
least annually to ensure the unit is working at its peak performance.
What to Calibrate: You must calibrate all soundheads used with this device at 1, 2 and 3
MHz frequencies, except the 1 cm
2
soundhead which is calibrated at 2 and
3 MHz only.
Equipment Required: You will require an ultrasound power meter capable of accurately
measuring outputs up to 3 MHz. Check the manufacturer’s specifications to confirm your
power meter meets this qualification. Ohmic Instrument UPM-DT1 or UPM-DT-10 are
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