Lead" Warning - No Patient Current - Dynatronics Dynatron 850 Plus Service Manual

If the graph indicates poor conductance, check to be sure leads and electrodes are in good
condition, that leads are fully plugged in and the entire surface of the electrode is making
contact with patient's skin. Extremely dry skin can also be a cause of poor conductance. If
leads or electrodes are found to be worn, they should be replaced. Leads may be tested using
the Lead Test function described in the operator's manual for this device. Guidelines for
replacing leads and electrodes are also provided in the operator's manual.
When you no longer wish to view the conductance graph, press the TIME key to redisplay
the treatment time. NOTE: The treatment time counter does not stop, but continues counting
down when the graph is displayed.
Disable the Conductance Bar Graph. If you do not wish to see the conductance bar graph
automatically during the treatment setup, you can disable this function. Press and hold the
FUNCTION and TIME mode keys while powering the device on (NEVER TURN THE
DEVICE ON OR OFF WHILE LEADS ARE CONNECTED TO A PATIENT). When
the device completes starting up, the word "bar" appears in the TIME display, and "1"
appears in the Power/Intensity display. Use the intensity up/down arrow keys to change from
"1" to "0" (select 1 to turn this option on, select 0 to turn the option off). Press START after
making your selection. Once you have disabled the automatic portion of this option, the
device will default to the disabled mode each time the device is powered on. However, you
may still view the conductance graph at any time after the treatment has started as described
above. If you wish to reset the default to re-enable the bar graph to appear automatically
during treatment setup, again press and hold the FUNCTION and TIME mode keys while
powering the device on and select the desired setting.

"LEAD" Warning - No Patient Current

This feature for models having software greater than Rev. 1.01 only (see Page 2).
This added safety feature warns you if the device detects an "open" or incomplete circuit
during setup of an interferential treatment. An open can be due to a lead that is not plugged
in, an electrode that has fallen off or otherwise is not making contact with the patient, or
another reason that would cause an incomplete circuit. When this occurs, current is not being
delivered to the patient, and the condition must be corrected before continuing with treatment
setup.
No Patient Current. During an interferential treatment setup, if an open is detected, the "Lead" warning
is displayed along with the channel number that triggered the error.
When the device detects this condition during the treatment setup, it will beep and display
"LEAD" in the Time display, and will indicate in the Intensity display the number of the
channel that has triggered the error (for example, CH1), and you will be unable to increase
the intensity setting. If this error occurs, reduce the intensity for the channel indicated,
correct the condition, then return the intensity to the desired treatment level. In adjusting
Operation & Treatment Instructions
Dynatron 850plus & 550plus
®
"LEAD" ERROR - No Patient Current
TIME
PAUSE
FUNCTION
22
POWER-INTENSITY
START
STOP