Dynatron® 850plus & 550plus
Ultrasound Technical Information
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remove corrosion from lead tips, use steel wool to gently scrape off the corrosion. Take care
not to scratch the metal plating of the tip during cleaning. If the tip’s metal surface becomes
pitted or uneven, the lead must be replaced.
Test Leads
To test leads, perform the following steps daily. Begin with the machine turned off.
1. Press and hold the TARGET/SWEEP toggle key while turning the device on. After
initial power up, the Lead Test function is launched. If the device is already powered on,
you can enter the Lead Test function by pressing and holding the FUNCTION key while
pressing the TARGET/SWEEP toggle key . When the device is in the Lead Test mode,
the Time display will read “LEAd.”
2. Plug a lead into Channel 1 (no other channel is used for the lead test). Remove snap
adapters (if applicable) from the leads, and hold the tips (pins) together. UNDER NO
CIRCUMSTANCES SHOULD THE LEADS BE CONNECTED TO A PATIENT
DURING THIS TEST!
3. Press START. A tone will sound until good contact with lead pins is achieved.
4. Hold the pin ends of the lead together. The tone will sound when the connection is bad
for any reason. Hold the pins securely together, move the leads around, wiggle the
cord, especially at the jack end of the cord. If the tone sounds, even for a short time,
check to be sure you are holding the pins together. If the tone continues to sound and
you are certain the pins are touching, the leads are probably bad and should be replaced.
4. After the test, remove the lead from Channel 1. Plug in the next lead to be tested, and
continue testing all leads in this way.
5. To exit the Lead Test function, press STOP. The device then shows the normal treatment
displays, and you may proceed with treatment setup.
NOTE: The lead Test should be used for testing patient lead wires only. This is not an
accurate means of testing carbon electrodes. Contact Dynatronics Customer Service to
arrange for free testing of carbon electrodes or for instructions for testing these electrodes.
Current Limit
The Dynatron 850plus and 550plus continuously measure the actual current output during a
treatment and limit the output current to the level indicated in “Technical Information” in this
manual. As you increase the intensity of a treatment, you also increase current output. If you
reach the maximum current limit, the device issues a warning (described below). This
warning is to alert you to the fact that you may have set the treatment intensity too high and
to prevent the possibility of patient discomfort caused by too high current output.
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