Dynatron® 850plus & 550plus
General & Technical Information
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General Specifications
Other ranges, accuracy and precision values that are not provided here may be obtained from
Dynatronics upon request.
Dynatron 850plus and 550plus Specifications
Power requirements: 100-240 V~, 50/60 Hz
Power consumption: 150 watts maximum
Fuse: 250 V, T1.6 AL slow blow
Dimensions: 9.5” W x 3.75” H x10” D
Weight: 4.6 pounds
Stim Specifications
Interferential/Premodulated Therapy: 4000 Hz sine wave frequency modulated by a 4000 to
4150 Hz variable frequency sine wave of equal amplitude
Russian Stimulation: 2500 Hz sine wave amplitude modulated at 50 Hz
Biphasic Stimulation: 50 to 400 µs pulse duration @
1-200 Hz (50% levels, see diagram)
Power output: 0 to 100 milliamps into a 500 ohm load, each
channel
NOTE: Devices for Canada and Japan have a 0 to 50
milliamps range. Devices with the 50 mA limit are
available for any user specifying this limit.
Microcurrent Specifications
Output Waveform: Two different waveforms are provided: (1) a monophasic pulse (with equal
on and off times), and (2) a biphasic wave (50% duty cycle). The polarity of each waveform is
selectable by the user. With the biphasic waveform pulse, equal charge of both polarities is
applied to the patient during each cycle of the treatment waveform.
Monophasic Square Wave
Biphasic Waveform
Pulse Frequency Range: .1 to 500 Hz
Maximum (open circuit) Voltage: 50V
Pulse Width
Vmin/2
Vmin
Vmax/2
Vmax
Biphasic Stimulation pulse
width (duration).
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