Dynatronics Dynatron 850 Plus Service Manual page 19

17. SOUND FREQUENCY TOGGLE: This key is pressed one or more times to select the
desired ultrasound frequency; 1 MHz, 2 MHz, or 3 MHz.
18. DUTY CYCLE TOGGLE: This key is pressed one or more times to select the desired
duty cycle for ultrasound treatment. Options are 10, 20, or 50 percent, or Continuous.
Russian / Biphasic / High Volt Selections:
19. BIPHASIC/RUSSIAN: Press this key once to begin setup of a biphasic treatment (the
Biphasic LED is lighted); press this key twice to begin setup of a Russian treatment (the
Russian LED is lighted). Biphasic and Russian treatments use a single channel (1 or 2)
when the Normal mode is selected; and a channel pair (1 and 2) when the Reciprocal or
Co-contraction mode is selected.
20. HIGH VOLT: Press this key to begin setup of a High Volt treatment (the Hi Volt LED is
lighted). The HV output channel is automatically selected (the LED for the channel
selected is GREEN). Connect the patient lead wire to the HV output jack.
HIGH VOLT POLARITY: To select or change the polarity of a high volt treatment, use
the HI VOLT key together with the FUNCTION key. Press and continue holding the
FUNCTION key while pressing the Hi Volt key one or more times to select positive only
(the "+" LED is lighted), negative polarity only (the "-" LED is lighted), or both (both
LEDs are lighted).
21. TREATMENT MODE TOGGLE (for biphasic and Russian treatments): Press this key
one or more times to select Normal, Co-Contraction, or Reciprocal contraction. The
output channel is automatically selected. When Normal is selected, one output jack only
is selected (1 or 2). When Co-contraction or Reciprocal is selected, channels 1 and 2 are
selected. Connect the patient lead wire(s) to the output jack(s) for the channel(s)
selected.
22. CONTRACTION/REST CYCLE TOGGLE (for Russian, biphasic, and high volt
treatments): Press this key one or more times to select the desired contraction/rest
(on/off) cycle . Available cycles include 10/10, 10/30, 10/50, and Continuous. The first
value indicates the on-time in seconds, and the second value indicates the off-time. For
example; 10/30 indicates the current is on (muscle is contracting) for 10 seconds, and
current is off (muscle is relaxed) for 30 seconds. With Continuous mode, current is
applied continuously with no off cycle. The continuous duty cycle is not recommended
for electrical muscle stimulation, but may be used for settings that are intended to effect
other results than a muscle contraction.
23. RAMP TIME TOGGLE (for Russian, biphasic, and high volt treatments): This key is
pressed to select the ramp time . The ramp time is applied before and after the "On"
segment of the cycle (it provides both a ramp up and a ramp down). Available ramp
times are .5, 1, 1.5, and 2 seconds.
NOTE: The High/Low option described previously under the Interferential/Premod options,
is also used for High Volt treatments (see item 13 above).
Dynatron 850plus & 550plus
®
11
Installation & Features