Dynatronics Dynatron 850 Plus Service Manual
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Dynatronics Dynatron 850 Plus Service Manual

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SERVICE MANUAL
Dynatron
850plus &
®
Dynatron
550plus
®
i

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  • Page 1 SERVICE MANUAL Dynatron 850plus & ® Dynatron 550plus ®...
  • Page 2 (21 CFR 890.5300) 850plus 550plus Dynatron® and Dynatron® Service Manual Revised June 2004 © Copyright 1997 Dynatronics Corporation 7030 Park Centre Drive Salt Lake City, UT 84121 (801) 568-7000 (800) 874-6251 ALL RIGHTS RESERVED...

  • Page 3: Table Of Contents

    Dynatron 850plus & 550plus ® Table of Contents Section I Introduction I Introduction to the Dynatron 850plus™ and 550plus™ ................ 2 New Features ............................2 Treatment Options ..........................3 Simplified Setup ............................. 4 Before You Treat a Patient ........................4 How to Use This Manual........................
  • Page 4 Dynatron 850plus & 550plus ® Biphasic / Russian Instructions ........................29 Basic Biphasic / Russian Setup......................30 Detailed Biphasic / Russian Setup ......................30 Biphasic / Russian Default Settings ......................33 High Volt Instructions..........................35 Set Up High Volt Treatment with Electrodes ..................35 Set Up High Volt Treatment with Optional Probe................36 Basic High Volt Setup ..........................37 Detailed High Volt Setup........................37 High Volt Default Settings........................41...
  • Page 5 Dynatron 850plus & 550plus ® Simultaneous Treatments......................... 62 Set Up A Second Treatment ......................... 62 Modify Simultaneous Treatments ......................63 Stop One Treatment..........................63 Setting Defaults ............................64 Save New Defaults ..........................64 Restore Factory Defaults ........................65 Interferential Default Settings ......................65 Premodulated Default Settings ......................
  • Page 6 High Voltage Pulsed Stimulation ......................82 Contraindications ..........................82 Warnings ...............................82 Precautions............................83 Treatment Setup Warnings ........................84 Adverse Effects.............................84 Use Only Dynatronics Accessories With This Device .................84 Contraindications, Warnings, & Precautions for Microcurrent Treatment........85 Indications for Use..........................85 Contraindications ..........................85 Warnings ...............................85 Precautions............................86 Adverse Reactions ..........................86 Contraindications, Warnings, &...
  • Page 7 Dynatron 850plus & 550plus ® Current Limit............................93 Current Limit Warning ......................... 94 Microcurrent Usage Cautions........................95 Ultrasound Usage Cautions........................96 Applicator Movement........................... 96 Patient Susceptibility ..........................96 Potential for Burns..........................96 Output Power............................97 Penetration of Ultrasound Waves......................97 Coupling ...............................
  • Page 8 Dynatron 850plus & 550plus ® Environmental Conditions ........................115 Safety Features of the Dynatron 850plus and 550plus ...............115 Care and Cleaning Instructions ......................116 Suggested Maintenance Schedule.......................116 Routine Ultrasound Calibration Inspections (Dynatron 850plus only)..........117 Software Updates ..........................118 Returning a Unit for Repair ........................118 Definition of Symbols.........................119 Equipment Classification ........................119 Disposal of Equipment and Accessories .....................119...
  • Page 9 Dynatron 850plus & 550plus ® Section I Introduction...

  • Page 10: Introduction To The Dynatron 850Plus™ And 550Plus

    Russian and biphasic stimulation, and microcurrent. The 850plus also includes ultrasound and combination therapy. The devices include the advantages of earlier Dynatronics models, such as customizable treatments with convenient setup. In addition, these units are smaller and lighter in weight than earlier models and now offer the option of battery operation, making the devices truly portable.

  • Page 11: Treatment Options

    550plus: Interferential Therapy: This traditional therapy, delivered with two channels and four electrodes, also includes Dynatronics’ patented Target feature for easy location of the treatment site and delivery of the full interferential beat where it is needed. You can select the high frequency range, the low frequency range, or both, along with Target.

  • Page 12: Simplified Setup

    Dynatron 850plus & 550plus ® no longer restricted to just one channel—any channel may be used. This means you may set up a combination treatment using any of the three electrotherapy output jacks. Combination therapy offers simultaneous treatment time and allows you to select from all the available options for both modalities used in the combined treatment.

  • Page 13: Installation And Features

    Complete the warranty registration form and return it to Dynatronics within 10 days of purchase. This is essential to insure you are not billed for services that are covered by the warranty policy.

  • Page 14: Soundheads And Probes

    An optional high volt probe or microcurrent probe may also be purchased for use with this device. Contact your Dynatronics dealer to order optional accessories Accessories The following optional and replacement accessories may be purchased from Dynatronics or from your Dynatronics dealer: Part No.

  • Page 15: Dynatron 850Plus And Dynatron 550Plus Physical Features

    Dynatron 850plus & 550plus ® TIME POWER-INTENSITY START STOP PAUSE FUNCTION TIME NORMAL MICRO FREQ BIPHASIC CO-CONT SOUND RATE RECIP RUSSIAN WIDTH 10/10 TARGET HIGH 10/30 HI VOLT SWEEP 10/50 PREMOD CONT .5 RAMP 1 MHz SOUND 1.0 RAMP MICRO 2 MHz 1.5 RAMP COMBO...
  • Page 16 TARGET HIGH 10/30 HI VOLT SWEEP 10/50 PREMOD CONT .5 RAMP Dynatronics 1.0 RAMP MICRO 1.5 RAMP TARGET 2.0 RAMP CH 1 CH 2 Dynatron 550plus Control Panel key while you press the Stop key, or by reducing that channel’s treatment time to zero.
  • Page 17 Dynatron 850plus & 550plus ® time will have yellow LEDs). The Time display can also display the pulse rate and width for Russian and biphasic treatments, as well as the frequencies for interferential, premodulated, and microcurrent treatments, and pulse rate for high volt. The treatment parameters for any treatment in progress may be displayed at any time by first using the channel toggle key to choose the desired channel then using the Time toggle key to select the desired parameter (Time, Freq, Rate, Width).
  • Page 18 Dynatron 850plus & 550plus ® IFC / Premod Selections: 12. IFC/PREMOD: Press this key once to begin setup of an interferential treatment (the IFC LED is lighted); press this key twice to begin setup of a premodulated treatment (the Premod LED is lighted). When you select IFC, both channels 1 and 2 are automatically selected and the green LED lights for those two channels will be on.
  • Page 19 Dynatron 850plus & 550plus ® 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.
  • Page 20 Dynatron 850plus & 550plus ® Microcurrent Selections: 24. MICRO: Press this key to begin setup of a microcurrent treatment. This key is also used to turn the conductance tone off and on after a microcurrent treatment is started. When MICRO is selected, Channel 1 is automatically selected for the default electrodes treatment and the LED for that channel is lighted.

  • Page 21: Instructions For Using Toggle Keys

    Dynatron 850plus & 550plus ® BATTERY: This jack may be used to supply power to the device using an optional battery pack. More information about the optional battery operation is provided later in this manual. 30. REMOTE STOP: A cord with a remote stop button is inserted in this jack. The remote stop is controlled by the patient during unattended therapy to allow the patient to stop the treatment at any time.
  • Page 22 Dynatron 850plus & 550plus ® IFC and Premod • Target/Sweep (IFC only) • High/Low Frequency Ranges Russian and Biphasic Stim • Treatment mode • Contraction/Rest cycle • Ramp Time High Volt Stim • Contraction/Rest cycle • Ramp Time • Polarity •...

  • Page 23: Time And Power Displays

    • The channel IS NOT delivering current. Ultrasound Heads (Dynatron 850plus only) The Dynatron 850plus features the new Dynatronics SmartHead™ ultrasound applicator soundhead that has all calibration information self-contained. SmartHeads may be used interchangeably with any 50 Series Plus model or the Dynatron 125 model with no need for entering calibration numbers into the device.

  • Page 24: Microcurrent Probes (Optional Accessory)

    Do not allow soundheads to repeatedly reach maximum head temperature. All of these conditions can cause damage to the crystal. Any such damage is not covered by the warranty. For new or replacement soundheads, contact Dynatronics or your authorized Dynatronics representative. Microcurrent Probes (optional accessory) The Dynatron 850plus and Dynatron 550plus devices offer optional probes for delivering hands-on microcurrent treatment.

  • Page 25: High Volt Probe (Optional Accessory)

    Place the electrode on the patient at a site where it will not interfere with placement of the active probe during treatment. The banana-to-pin adapter is an optional accessory available from Dynatronics. High Volt Probe (optional accessory)

  • Page 26: Quick Reference Of Special Key Presses

    Dynatron 850plus & 550plus ® Quick Reference of Special Key Presses The following is a brief list of special key presses available with this device. These options are explained in detail where they apply in the treatment instructions later in this manual. NOTE: Where two keys are required (ie, FUNCTION-STOP) you must press both keys simultaneously to achieve the result.

  • Page 27: Operation And Treatment Instructions

    Dynatron 850plus & 550plus ® Section II Operation and Treatment Instructions Operation & Treatment Instructions...

  • Page 28: General Operating Instructions

    Dynatron 850plus & 550plus ® General Operating Instructions Power On/Off Press the power switch located on the rear panel of the unit. The self-diagnostic and calibration function automatically occurs each time the unit is turned on. It is recommended that the unit remain on throughout the day if it is used on a regular basis.

  • Page 29: Conductance Bar Graph

    Dynatron 850plus & 550plus ® 7. Administer treatment until the treatment time expires, or press STOP to stop all treatments in progress at any time. Each of the therapies you can deliver with the Dynatron 850plus and 550plus offers its own default settings.

  • Page 30: Lead" Warning - No Patient Current

    Dynatron 850plus & 550plus ® 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.
  • Page 31 Dynatron 850plus & 550plus ® intensity, always observe the warnings and precautions provided in the operator’s manual for this device. This error will not occur if the intensity is set below 11. The error condition can also be detected during setup of premodulated treatments at the High frequency settings. The error warning will also occur while a treatment is in progress under the same conditions described above, but will only be displayed if the affected channel is currently selected for display.

  • Page 32: Interferential / Premodulated Instructions

    Dynatron 850plus & 550plus ® Interferential / Premodulated Instructions WARNING • NEVER turn the power on or off while the unit is connected to the patient. • Always give the Remote Stop cable to the patient prior to the treatment. •...

  • Page 33: Detailed Interferential / Premodulated Setup

    Dynatron 850plus & 550plus ® NOTE: Prior to increasing intensity, electrodes must be placed on the patient and the lead(s) attached to the device. Plug the lead(s) into the channel(s) the device selects for this treatment. Give the remote stop cable to the patient. Consult published sources for electrode placements, treatment settings, and treatment times.
  • Page 34 Dynatron 850plus & 550plus ® The lower limit in the sweep range is shown The upper limit of the range is shown here. In here. In this example, this is the lower limit this example, this is the upper limit of the of the default HIGH frequency range.
  • Page 35 SWEEP. Press the toggle key one or more times to select this option. This option uses Dynatronics’ patented Target feature to automatically move the point of interference in a somewhat spiral fashion covering 75 to 80 percent of the area within the electrodes. This allows you to bathe a more general area with the interferential current while retaining the full interferential beat.

  • Page 36: Interferential / Premodulated Default Settings

    Dynatron 850plus & 550plus ® • Use the High/Low toggle key to select a different frequency option (High, Low, or High/Low alternating only. High/Low consecutive is only available during treatment setup). • Use the Target/Sweep toggle key to change this option (IFC only) •...

  • Page 37: Biphasic / Russian Instructions

    Dynatron 850plus & 550plus ® Biphasic / Russian Instructions WARNING • NEVER turn the power on or off while the unit is connected to the patient. • Always give the Remote Stop device to the patient prior to the treatment. •...

  • Page 38: Basic Biphasic / Russian Setup

    Dynatron 850plus & 550plus ® would deliver stimulation for 10 seconds to the first muscle, followed by 10 seconds of stimulation to the reciprocal muscle. The 30-second rest time follows each stimulation. The timing of the two cycles will overlap (the first muscle group is stimulated after a 30-second rest, even though the second muscle group is 20 seconds into its rest cycle).
  • Page 39 Dynatron 850plus & 550plus ® 3. Choose the CONTRACTION/REST cycle times. Press the toggle key one or more times to select contraction/rest cycle times. Available options include 10/10, 10/30, 10/50 and Continuous. The setting of 10/30, for example, means a 10-second contraction time followed by a 30-second rest time. Note that you may not select Continuous cycle for a Reciprocal treatment.
  • Page 40 Dynatron 850plus & 550plus ® 8. For co-contraction or reciprocal treatments, select the SECOND CHANNEL and set the INTENSITY for this channel. Intensity is set for each channel separately. Press the Channel Toggle key to select the second channel. When you are setting intensity, only the channel with the solid green light is affected.

  • Page 41: Biphasic / Russian Default Settings

    Dynatron 850plus & 550plus ® During a Biphasic or Russian treatment you may make the following modifications: • Use the toggle keys to select a different contraction/rest cycle. • Use the toggle keys to select a different ramp time. • Use the Time arrow keys to increase or decrease the treatment time.
  • Page 42 Dynatron 850plus & 550plus ® Biphasic Stimulation: Default Setting Valid Range Pulse Rate 50 Pulses per second 1 to 500 Pulse Width 200 µSec 50 to 400 µSec Russian Stimulation: Default Setting Valid Range Pulse Rate 50 Pulses per second 1 to 500 (depends on Pulse Width) Pulse Width 10 mSec...

  • Page 43: High Volt Instructions

    Dynatron 850plus & 550plus ® High Volt Instructions WARNING • NEVER turn the power on or off while the unit is connected to the patient. • Always give the Remote Stop device to the patient prior to the treatment. • Always STOP a treatment before removing or attaching electrodes or leads. Leads and electrodes must only be applied to the patient before a treatment is started.

  • Page 44: Set Up High Volt Treatment With Optional Probe

    In this case, be sure the dispersive electrode is at least twice the size (in area) of the combined sizes of the active electrodes. The bifurcated lead wire extension is an optional accessory available through your Dynatronics dealer. During the treatment current flows in one direction between the active and dispersive electrodes.

  • Page 45: Basic High Volt Setup

    Dynatron 850plus & 550plus ® When setting intensity, the probe must be making contact with the patient’s skin. Ensure that the patient can feel the current as you increase the intensity. Do not increase intensity for probe treatments if the patient is unable to report feeling the current. Basic High Volt Setup 1.
  • Page 46 Dynatron 850plus & 550plus ® setup too uncomfortable, you may consider selecting a monopolar treatment and/or reducing the intensity. 3. Choose the CONTRACTION/REST cycle times. Press the toggle key one or more times to select contraction/rest cycle times. Available options include 10/10, 10/30, 10/50 and Continuous. The setting of 10/30, for example, means a 10-second contraction time followed by a 30-second rest time.
  • Page 47 Dynatron 850plus & 550plus ® change the upper and lower limits of the range chosen. If you set both displays to the same value, the treatment will be delivered at that single pulse rate rather than sweep through a range. The lower limit in the sweep range is shown The upper limit of the range is shown here.
  • Page 48 Dynatron 850plus & 550plus ® intensity before pressing START, the intensity display will begin flashing, and you will be unable to start the treatment until you set the intensity. NOTE: SAVE DEFAULTS. If the treatment you have just set up is the most common High Volt setup you use, you can save the treatment parameters as new defaults for your own machine.

  • Page 49: High Volt Default Settings

    Dynatron 850plus & 550plus ® High Volt Default Settings The following default settings are set by the manufacturer and are selected when you select High Volt. You may change these defaults to your own preferred settings. See “Setting Defaults” in this manual. •...

  • Page 50: Microcurrent Instructions

    Dynatron 850plus & 550plus ® Microcurrent Instructions WARNING • NEVER turn the power on or off while the unit is connected to the patient. • Always STOP a treatment before removing or attaching electrodes or leads. • Never use worn or damaged leads or electrodes as these may result in injury to the patient.

  • Page 51: Microcurrent Treatment Time

    Dynatron 850plus & 550plus ® Microcurrent Treatment Time • All probe treatments are manual, and a treatment time is not set. During the probe treatment, the timer will start at zero and count UP in SECONDS when current is on, and will return to zero when current is stopped.
  • Page 52 Dynatron 850plus & 550plus ® 5. Change FREQUENCY, if desired. To change the frequency, use the Time toggle key to select FREQ, then use the Time up/down arrow keys to change the frequency. You can press the Time toggle key again to return to the Time display, if desired.
  • Page 53 Dynatron 850plus & 550plus ® incremental value representing the volume selection. You must continue holding the FUNCTION key down while adjusting the volume. When you release the FUNCTION key, the Power-Intensity display returns to its normal display. 9. MODIFY a treatment in progress. While the treatment is in progress, you can modify the treatment parameters.

  • Page 54: Audio Tone

    How To Use Microcurrent Probes (The microcurrent active and ground probes are optional accessories available from Dynatronics) For both the active and ground probe, use the end of a cotton swab (such as a Q-Tip ) inserted into the end of the probe. Cut the end of the swab to a short length. The ®...
  • Page 55 (this optional adapter is available from your Dynatronics dealer), then attach an electrode to the pin. Place the electrode on the patient at a site where it will not interfere with placement of the active probe during treatment.

  • Page 56: Ultrasound Instructions

    Dynatron 850plus & 550plus ® Ultrasound Instructions The following Ultrasound Instructions are for DYNATRON 850plus USERS ONLY. The Dynatron 550plus model does not offer the ultrasound feature. WARNING • ALWAYS keep the applicator soundhead in constant motion. • ALWAYS keep the soundhead properly coupled to the patient’s skin or submerged under water when intensity is turned on.

  • Page 57: Turn Soundhead Warming Off / On

    Dynatron 850plus & 550plus ® Turn Soundhead Warming Off / On If you do not wish to use the head warming feature, you can turn the feature off with the following key press. The head warming setting is saved and will apply to the device whenever it is used until you change the setting again.
  • Page 58 Dynatron 850plus & 550plus ® 4. Change the treatment TIME, if desired. Use the Time up/down arrow keys to change the treatment time, if needed. 5. Raise POWER. Use the Power-Intensity up/down arrow keys to increase the power to the desired setting. For patient safety and comfort, it is recommended that you start with .1 w/cm , then increase power to the desired level after the treatment begins.

  • Page 59: Ultrasound Default Settings

    Dynatron 850plus & 550plus ® NOTE: During a combo treatment, THE STIM OUTPUT OF THE TREATMENT IS NOT PAUSED when the PAUSE key is pressed, although the ultrasound output is stopped and the treatment timer is paused. 9. Press STOP if you need to stop a treatment before its time has expired. When the treatment time for a treatment has elapsed, the output to the soundhead is stopped and a tone sounds notifying you of the treatment end.

  • Page 60: Poor Coupling

    Dynatron 850plus & 550plus ® Poor Coupling If all or part of the soundhead is not touching the patient, coupling may not be adequate and the patient will not receive the intended dosage of the ultrasonic wave. Poor coupling, if allowed to continue, can also result in increased temperature of the soundhead.

  • Page 61: Head Temperature Hot

    Dynatron 850plus & 550plus ® After a second the display returns to the treatment time display. Repeat this key sequence to change the default setting again, if desired. NOTE: In changing the coupling setting, you may inadvertently PAUSE the treatment (the PAUSE LED will be lighted). Just press PAUSE again to resume the treatment.

  • Page 62: Head Temperature Bar Graph

    Dynatron 850plus & 550plus ® When the temperature is again satisfactory, press the START key to resume the treatment; output power resumes, the displays return to its normal state, and the timer resumes. While the soundhead is still too hot, the device will not allow you to resume the treatment. To prevent overheating of the soundhead, maintain good coupling throughout the treatment.
  • Page 63 Dynatron 850plus & 550plus ® • The default power display is W/cm . If you change A non-blinking decimal = Power displayed in Watt/cm the display to WATTS A blinking decimal = Power displayed in Watts during use, the machine reverts to the W/cm display when the machine POWER-INTENSITY...

  • Page 64: Combination Therapy Instructions

    • Be alert for any sign of periosteal (bone) pain. Comboplus™ Dynatronics’ new Comboplus feature means you have almost unlimited options in setting up a combination treatment with the Dynatron 850plus. Now you can • Combine an ultrasound treatment with any electrotherapy modality provided by this device (single-channel options only;...

  • Page 65: Stim Through The Soundhead

    Dynatron 850plus & 550plus ® Plug the banana end of the combo lead wire into When you select COMBO and select the stim input jack on the back panel of the D850plus stim modality to be combined with ultrasound, the device automatically chooses an ouput jack for the treatment.

  • Page 66: Combination Therapy Setup

    Dynatron 850plus & 550plus ® Combination Therapy Setup In order to set up a combo treatment, you must be familiar with setup instructions for both the electrotherapy modality to be used and ultrasound as explained earlier in this manual. Also remember: •...
  • Page 67 Dynatron 850plus & 550plus ® sure the combo lead is plugged into the correct output jack for the stim modality you have selected. 3. Enter treatment parameters for the selected modality as instructed earlier in this manual. 4. Place the soundhead at the treatment site making good contact with the skin (be sure you have applied conductive gel first).

  • Page 68: Modify Treatment

    Dynatron 850plus & 550plus ® REMOTE STOP: During “unattended therapy,” a patient stop button is provided to allow the patient to stop treatment. The remote cord should be plugged into the machine prior to starting the treatment. When the remote stop button is pressed, all output from the device is stopped, time is set to zero, and a tone sounds briefly.

  • Page 69: Combination Default Settings

    Dynatron 850plus & 550plus ® Combination Default Settings The factory default for a combination treatment is an ultrasound treatment with a premodulated treatment and the respective default settings for those two modalities. If you save defaults during a Combo treatment the following settings are saved: •...

  • Page 70: Simultaneous Treatments

    Dynatron 850plus & 550plus ® Simultaneous Treatments The Dynatron 850plus and 550plus allow several combinations of simultaneous treatments to be delivered at once using available channels. Simultaneous treatments are not the same as combo treatments. A combo treatment combines ultrasound with a stim therapy into a single treatment.

  • Page 71: Modify Simultaneous Treatments

    Dynatron 850plus & 550plus ® Modify Simultaneous Treatments You may VIEW and MODIFY parameters for the channel with the GREEN light. While two or more treatments may be in progress at once, the “Time” display and the “Power-Intensity” displays can show the settings for only one channel at a time. The settings displayed are for the channel with the GREEN light only.

  • Page 72: Setting Defaults

    Dynatron 850plus & 550plus ® Setting Defaults Each of the modalities has default settings that are automatically selected when you press that modality key. The default setting feature allows you to set up a treatment with common treatment parameters in just seconds. For guidance in selecting the appropriate settings for each modality, consult published medical literature.

  • Page 73: Restore Factory Defaults

    Dynatron 850plus & 550plus ® Restore Factory Defaults If you have saved your own defaults, but would like to return ALL your default settings to those that were set at the factory, do the following: 1. Turn the machine off. 2.

  • Page 74: High Volt Default Settings

    Dynatron 850plus & 550plus ® High Volt Default Settings • Continuous on time • Treatment time: 10 minutes • Ramp up and down time: .5 sec. • Polarity: Negative • Pulse Rate Default High Range: 80-120 Hz Default Low Range: 1-10 Hz Available Range: 1-200 Hz Microcurrent Default Settings The Microcurrent treatment setup with electrodes is the default, and the following defaults are...

  • Page 75: Battery Operation

    Do not substitute another battery without first confirming with Dynatronics that the battery you are purchasing may be used with this device. Only use a battery that CANNOT be recharged while it is in use. Disconnect the battery charger from the AC power source before using the battery to supply power to this device.

  • Page 76: Battery Requirements

    Dynatron 850plus & 550plus ® Battery Requirements • 12 volt and at least 5 amps peak current (1.5 ampere hours minimum). • Battery adapter cord Cigarette lighter plug on one end (to attach to the battery pack) and a barrel plug on the other end (to fit a .325 barrel jack).

  • Page 77: General Modality Information

    Dynatron 850plus & 550plus ® Section III General Modality Information General Modality Information...

  • Page 78: Interferential And Premodulated Therapy

    Dynatron 850plus & 550plus ® Interferential and Premodulated Therapy Interferential (Quadpolar) Therapy Interferential therapy uses four electrodes to deliver two currents, one current with a constant frequency of 4000 Hz and the other current with a variable frequency of 4,001 to 4150 Hz.

  • Page 79: Target

    850plus & 550plus ® Target The Dynatron 850plus and 550plus feature Dynatronics’ patented TARGET feature (available for interferential treatments only) simplifies electrode placement for an interferential treatment. Interferential treatment is performed using four electrodes with two channels. The channels produce two currents which intersect producing the interferential “beat.” Without Target, it is often difficult to place the electrodes in the right position to produce the beat at the desired treatment area.

  • Page 80: Sweep

    Dynatron 850plus & 550plus ® Sweep Channel Channel You can use the Sweep (Target Sweep) feature to bathe a wider area with the interferential current— up to 80 percent of the area within the electrodes may be covered. The Sweep feature utilizes the patented Target feature and moves the point of interference to cover a wider treatment area while still retaining the full interferential beat.

  • Page 81: Russian / Biphasic Therapy

    Dynatron 850plus & 550plus ® Russian / Biphasic Therapy Russian Stimulation With the Dynatron 850plus and 550plus’ Russian stimulation mode, the output of the device is a 2500 Hz sinusoidal wave. Russian stimulation currents produce strong muscle contractions. The Dynatron 850plus and 550plus allow you complete control over all the parameters of the Russian Stimulation treatment.
  • Page 82 Dynatron 850plus & 550plus ® The pulse width indicates the duration (in milliseconds or microseconds) of the output cycle of the pulse, and the pulse rate is measured in number of pulse occurrences per second. Between pulses, current is at zero. A 50 percent duty cycle or less is the usual duty cycle for Russian stimulation (the duty cycle includes one output cycle period and one zero-current period).
  • Page 83 Dynatron 850plus & 550plus ® The pulse rate and width may be modified during setup of a Russian or Biphasic Stimulation treatment or may be modified while a treatment is in progress. Since a channel pair shares pulse parameters during a Russian or biphasic treatment, you cannot deliver both a Russian and a biphasic treatments at the same time with this device.

  • Page 84: High Volt Therapy

    Dynatron 850plus & 550plus ® High Volt Therapy High voltage pulsed stimulation is a pulsed DC current with pulse widths in the microsecond range and pulse rates ranging from 1 to 200 Hz, with a peak amplitude of up to 1.0 A utilizing a twin-peak monophasic waveform.
  • Page 85 Dynatron 850plus & 550plus ® single pulse rate instead of a range. The pulse rate is selected from a range of 1 to 200 Hz. Selectable Polarity. Positive or Negative monophasic current may be selected. You may also select both positive and negative and the current delivered alternates between the two polarities.

  • Page 86: Microcurrent Therapy

    Dynatron 850plus & 550plus ® Microcurrent Therapy Microcurrent is low-volt pulsed microamp stimulation which has been used for symptomatic relief of chronic intractable and post-surgical pain. With the Dynatron 850plus or 550plus you can provide attended or unattended microcurrent therapy. Unattended therapy is delivered using electrodes. Attended therapy is delivered using an optional hand-held probe.

  • Page 87: Ultrasound Therapy

    SmartHeads The Dynatron 850plus includes Dynatronics’ new SmartHead™ ultrasound applicator. These soundheads have calibration numbers programmed into them allowing the soundheads to be freely exchanged with other Dynatron 850plus units or with the Dynatron 950plus, the Dynatron 150plus, and the Dynatron 125 models.

  • Page 88: Soundhead Temperature

    Dynatron 850plus & 550plus ® Soundhead Temperature When coupling is poor, the temperature of the soundhead rises and the patient does not receive the full ultrasonic output. The Dynatron 850plus continuously measures the temperature of the soundhead to ensure both that the patient is receiving the optimal treatment and that the soundhead crystal is protected from overheating.

  • Page 89: Contraindications, Warnings, And Precautions

    Dynatron 850plus & 550plus ® Section IV Contraindications, Warnings, and Precautions Ultrasound Technical Information...

  • Page 90: Contraindications, Warnings, & Precautions For Interferential, Premodulated, Russian, Biphasic, And High Voltage Pulsed Stimulation

    Dynatron 850plus & 550plus ® Contraindications, Warnings, & Precautions for Interferential, Premodulated, Russian, Biphasic, and High Voltage Pulsed Stimulation Contraindications Thrombosis: It is possible that the current produces chemical changes in the blood leading to alterations in the clotting time. At present there is no hard evidence to support this. Nevertheless, treatment must not be given to any patient who is taking anticoagulants as it may render these ineffective.

  • Page 91: Precautions

    Dynatron 850plus & 550plus ® • Implants of any electrical nature • Do not use over a carotid sinus • Transcerebrally • Disturbances in cardiac rhythm 6. The long-term effects of chronic electrical stimulation are unknown. 7. This device should not be used to relieve pain syndromes until etiology has been established.

  • Page 92: Treatment Setup Warnings

    Use Only Dynatronics Accessories With This Device The leads and electrodes provided by Dynatronics have been tested with Dynatronics devices and are appropriate for use with these devices. Dynatronics cannot guarantee the safety or performance of leads and electrodes purchased from other vendors.

  • Page 93: Contraindications, Warnings, & Precautions For Microcurrent Treatment

    Dynatron 850plus & 550plus ® Contraindications, Warnings, & Precautions for Microcurrent Treatment Indications for Use This device is used to provide symptomatic relief of chronic intractable pain. Contraindications The following treatment conditions are specifically contraindicated and must be excluded: 1. Any electrode placement that applies current to the carotid sinus (neck) region. 2.

  • Page 94: Precautions

    Dynatron 850plus & 550plus ® Precautions 1. Isolated cases of skin irritation may occur at the site of electrode placement following long-term application. 2. Effectiveness is dependent upon patient selection. 3. Some patients may experience skin irritation or hypersensitivity due to the electrical stimulation or electrical conductive medium.

  • Page 95: Contraindications, Warnings, & Precautions For Ultrasound Treatment

    Dynatron 850plus & 550plus ® Contraindications, Warnings, & Precautions for Ultrasound Treatment Contraindications The Dynatron 850plus ultrasound should not be applied in the following conditions: • Pregnancy • Acute and sub-acute thrombosis and thrombophlebitis • Potentially malignant lesions, tumors malignant or benign •...

  • Page 96: Precautions

    Dynatron 850plus & 550plus ® Precautions The Dynatron 850plus must be used cautiously in the presence of any of the following conditions: • When there is a tendency to hemorrhage following acute trauma or fracture. • Acute bursitis. Do not use in continuous duty cycle mode. Warnings •...

  • Page 97: Electrotherapy Usage Cautions

    Dynatron 850plus & 550plus ® Electrotherapy Usage Cautions The following are general cautions to be observed during interferential, premodulated, Russian, biphasic, and high voltage pulsed stimulation. For microcurrent electrotherapy, see separate “Microcurrent Usage Cautions” following this section. Electrical stimulation, by its very nature, has the ability to irritate the patient’s skin. Certain precautions should be observed to assure maximum safety and comfort for patients.

  • Page 98: Carbon Electrodes

    Dynatron 850plus & 550plus ® NOTE: The above intensity settings should be considered maximum and not target intensities. These suggested settings apply to interferential and premodulated treatments. For high voltage pulsed stimulation the intensity is displayed in volts; therefore, these suggested settings do not apply.

  • Page 99: Self-Adhesive Electrodes

    Do not take chances with patient safety! Discard worn carbon electrodes! If you think your carbon electrodes are showing wear, you can send them to Dynatronics to be tested with an ohm meter. Good carbon electrodes should test at between 40 and 200 ohms.

  • Page 100: Combination Treatment Usage Cautions

    Dynatron 850plus & 550plus ® To Restore Adhesiveness: • Before a Treatment: Before placing the electrode on patient, moisten the patient’s skin with a damp cloth using plain water, then apply the electrode to the skin. • After a Treatment: Spray the adhesive side of the electrode with plain water, rub it lightly with fingertips, then reapply the electrode to its plastic backing and seal it tightly in its storage pouch.

  • Page 101: Test Leads

    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.

  • Page 102: Current Limit Warning

    Dynatron 850plus & 550plus ® Current Limit Warning When you reach the maximum output current limit, the device will: • Immediately stop increasing the intensity and automatically reduce the intensity a few increments • Beep several times • Flash the intensity display You should rarely, if ever, encounter the current limit warning during a patient treatment as reaching the current limit would often require an intensity setting that is uncomfortable and intolerable to most patients.

  • Page 103: Microcurrent Usage Cautions

    Dynatron 850plus & 550plus ® Microcurrent Usage Cautions Microcurrent uses only very low frequencies and the current generally is not felt by the patient. However, microcurrent at high intensity settings, especially when using probes, can sometimes be felt by the patient, and may even be uncomfortable for the patient. This is a result of current being concentrated at a very small area.

  • Page 104: Ultrasound Usage Cautions

    Dynatron 850plus & 550plus ® Ultrasound Usage Cautions (For Dynatron 850plus users only. The Dynatron 550plus does not offer the ultrasound feature.) Ultrasound, by its very nature, has the ability to irritate the patient’s skin. While the benefits of ultrasound far outweigh any disadvantages, certain precautions should be observed to assure maximum safety and comfort for your patients.

  • Page 105: Output Power

    Dynatron 850plus & 550plus ® Burns can be avoided as long as the treatment causes no pain, tingling, excess heat or aching (for patients with normal skin sensation). Use sufficient coupling agent and make sure there are no bubbles in the gel. When treating in water, clear the bubbles off the soundhead and off the patient’s skin.
  • Page 106 Dynatron 850plus & 550plus ® Ultrasound Technical Information...

  • Page 107: Ultrasound Technical Information

    Dynatron 850plus & 550plus ® Section V Ultrasound Technical Information For the Dynatron 850plus Only Ultrasound Technical Information...

  • Page 108: Ultrasound Regulation

    Dynatron 850plus & 550plus ® Ultrasound Regulation The Dynatron 850plus complies with the following: • IEC 601-2-5: 1984. Medical Electrical Equipment Part 2: Particular requirements for the safety of ultrasonic therapy equipment. • FDA 21CFR 1050(c)(1)(i). The error in indication of the temporal-average ultrasonic power shall not exceed ±20 percent for all emissions greater than 10 percent of the maximum emission.

  • Page 109: Beam Profile

    Dynatron 850plus & 550plus ® Beam Profile (For Dynatron 850plus users only. The Dynatron 550plus does not offer ultrasound.) The following diagrams show the typical spatial distribution of the radiated field for each size of Dynatron 850plus sound head. This applies to the radiation emitted into the equivalent of an infinite medium of distilled, degassed water at 30˚...
  • Page 110 Dynatron 850plus & 550plus ® 1 MHz 2 MHz 3 MHz 5 cm Head. Near Field Ultrasound Technical Information...
  • Page 111 Dynatron 850plus & 550plus ® 1 MHz 2 MHz 3 MHz 2 cm Head. Near Field Ultrasound Technical Information...

  • Page 112: Enter Soundhead Parameters

    (For Dynatron 850plus users only) New SmartHeads™ The Dynatron 850plus features Dynatronics’ new SmartHead™ soundhead that has all calibration information self-contained. With the new SmartHead, it is not necessary to enter soundhead parameters as with earlier Dynatron devices. The new SmartHeads can be used with the Dynatron 125 or the 50 Series PLUS models.
  • Page 113 Dynatron 850plus & 550plus ® NOTE: THE ABOVE NUMBERS ARE PROVIDED FOR ILLUSTRATION ONLY AND SHOULD NOT BE ENTERED INTO YOUR DYNATRON DEVICE. USE ONLY THE ACTUAL NUMBERS PROVIDED WITH YOUR OWN SOUNDHEAD. 2. Plug in Soundhead. Turn the Dynatron 850plus off, then plug in the new soundhead. 3.

  • Page 114: Calibration Procedure

    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.
  • Page 115 The procedure utilizes keys and displays on the key pad that are normally used for other purposes, but which have specialized applications in the Calibration Mode. If you have any questions about the following instructions, contact Dynatronics’ Customer Service Department before proceeding. STEPS Soundhead Types Table 1.
  • Page 116 Dynatron 850plus & 550plus ® 6. The Dynatron 850plus performs the calculation internally for the “Z” (impedance value) and the coupling value. Target Value - Power Meter These values are automatically entered and stored in the Head Parameters for the Head Size Power Meter Value device (this operation is automatic and...

  • Page 117: Problem Solving

    Dynatron 850plus & 550plus ® Problem Solving Soundhead Temperature Too Hot If poor coupling occurs during a treatment, the temperature of the soundhead rises and the patient does not receive the full ultrasonic output. This device continuously measures the temperature of the soundhead to ensure both that the patient is receiving the optimal treatment and that the soundhead crystal is protected from overheating.

  • Page 118: Soundhead Temperature Too Cold

    Check to be sure the soundhead has not become disconnected from the machine. The soundhead should be firmly plugged into its port. Only Dynatronics soundheads may be used with this device. If the soundhead has been dropped, it may be damaged. If the device operates normally with one soundhead, but not with another, the problem may be a damaged soundhead and you must contact Dynatronics Customer Service.
  • Page 119 Make a note of the error message and the sequence of events that cause the error, and contact Dynatronics Customer Service at 1-800- 874-6251 for further assistance. Do not send the device to Dynatronics without first contacting the Customer Service Department.
  • Page 120 Dynatron 850plus & 550plus ® Ultrasound Technical Information...

  • Page 121: Technical Information

    Dynatron 850plus & 550plus ® Section VI Technical Information Service...

  • Page 122: General Specifications

    850plus & 550plus ® 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...

  • Page 123: High Volt Specifications

    Dynatron 850plus & 550plus ® Microcurrent Pulse Output Current Range: 10 to 990 microamps into 500 ohm load, constant current High Volt Specifications Waveform: Twin peak, monophasic Pulse Width: 25 µs Pulse Rate Range: 1 to 200 Hz Pulse Interval: 100 µs Maximum Power Output: Limited to less than 500 V, open load Ultrasound Specifications (Dynatron 850plus only) Ultrasound Power output:...

  • Page 124: Care And Cleaning Instructions

    Dynatron 850plus & 550plus ® • All intensity levels are automatically set to zero at the end of treatment (ensures proper setting of intensity levels for the next patient). • Internal surge protection protects against line noise, machine switching operation and any other type of interference that could cause patient discomfort.

  • Page 125: Routine Ultrasound Calibration Inspections (Dynatron 850Plus Only)

    To have the inspection performed by Dynatronics contact Dynatronics’ Customer Service Department. The device will need to be shipped to Dynatronics for the inspection. As an alternative, these periodic checks may be performed in your own locale by an independent contractor who is expert in checking the calibration of ultrasound equipment.

  • Page 126: Software Updates

    Why the Information is Necessary Dynatronics, is required by the FDA to keep records on all units sold consisting of 1) the date the unit was sold, 2) to whom it was sold, 3) any problems the customer has with that unit in...

  • Page 127: Definition Of Symbols

    Packaging and Shipping of Replacement Parts All defective or broken parts should be shipped back to Dynatronics in the original shipping container. These containers are designed to withstand the punishment of shipping. If the original containers are not usable, find containers that are similar in protection so damage in shipping will be prevented.

  • Page 128: Additional Technical Information Available (For Technicians Only)

    (3 to 5 inches in length); the pigtails have female connectors. Since all Dynatronics electrodes have either no lead wire at all or very short pigtail lead wires, it is impossible to connect an electrode directly to an improper power source when the electrode alone is attached to the patient.

  • Page 129: Medical Device Reporting Requirements

    Dynatronics devices. The stereo connector is 1/4” in diameter and cannot be inserted directly into an AC power source. NOTE: As of May 9, 2000 new FDA compliant lead wires are available from Dynatronics and are included with all new devices.
  • Page 130 Dynatron 850plus & 550plus ® General & Technical Information...

  • Page 131: Service

    Dynatron 850plus & 550plus ® Section VII Service Service...

  • Page 132: Processor Interaction

    Dynatron 850plus & 550plus ® Processor Interaction Processor Interaction with the Keyboard and Displays The keyboard is controlled by a microcontroller which scans the keys for key presses, keeps the displays updated, and reads any position from the XY pad. Periodically (several times per second) the main processor polls the keyboard processor, receiving status of any keys pressed or XY position, and updating the displays as required.

  • Page 133: Basic Trouble Shooting Techniques

    Prior to testing the leads, a test jack must be made. Any standard 1/4" stereo jack will work well. Call the service department at Dynatronics if you are unsure of what is needed. The test jack is made by shorting the connections for the patient lead together. These connections are inside of the jack and touch the patient lead as it is inserted into the jack.

  • Page 134: Installing Software Updates

    Such updates are installed via the “COM” port on the device using a handheld download device which is available from Dynatronics. It is recommended that a Dynatronics dealer perform the software update for you. This will ensure the software update is installed successfully, and will save you the expense of purchasing the separate download device.

  • Page 135: Schematics And Qc Check Lists

    Dynatron 850plus & 550plus ® Section VIII Schematics and QC Check Lists Schematics and QC Check Lists...
  • Page 136 Dynatron 850plus & 550plus ® DYNATRON 950/850 Plus STIM FINAL QUALITY CHECK (Q.C.) CHECKOFF SHEET TECH/QC (initials) 1. INTERFERENTIAL: 42-55 Vpp a) Static- High/Low (all channels) ± 4 Vpp b) Target/ Sweep (all channels) c) Modify Features (mode, time, function, cancel) d) Verify current limit 50mA maximum 2.
  • Page 137 Dynatron 850plus & 550plus ® DYNATRON 950/850 Plus FINAL QUALITY CHECK (QC) CHECKOFF SHEET Unit S/N__________________ Software Version_____ Date__/__/__ Repair____RS____Production____ Head SN: 5cm______________10cm______________2cm_______________1cm _______________ Refer to Test equipment operation manual and unit operating instructions/ manuals. TECH/QC (initials) • Verify all keys work, all keys have good tactile feel •...
  • Page 138 Dynatron 850plus & 550plus ® DYNATRON 650/550 PLUS and PLUS E FINAL QUALITY CHECK Unit S/N__________________ Software Ver._____ Date__/__/__ TECH/QC Repair_____RS_____Production_____ (Initials) 1. Verify all LED’s light, all key presses function and have good tactile feel. 2. INTERFERENTIAL: 42-55 Vpp a) Static- High/Low (all channels) ±...

This manual is also suitable for:

Dynatron 550 plus

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