DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL I
CAUTION
Federal law restricts these devices for sale by or on the order of a physician, chiropractor, physical therapist, or
dentist licensed by the law of the state in which said person practices to use or order the use of the devices.
Risk of burns and re - Do not use near conductive materials such as metal bed parts, inner spring mattresses
and the like.
DANGER - Explosion Hazard: Do not use in the presence of ammable anesthetics.
IMPORTANT: Before treating a patient with any Dynatron® 25 Series™ Device, see the “Contraindications, Warnings,
and Precautions” in this manual. Read the operating instructions for each modality carefully.
INDICATIONS FOR USE
ELECTROTHERAPY: Electrical muscle stimulation therapy (Russian, Biphasic, High Volt) for:
1. relaxation of muscle spasm;
2. prevention or retardation of disuse atrophy;
3. increasing local blood circulation;
4. muscle re-education;
5. immediate post-surgical stimulation of calf muscles to prevent venous thrombosis
6. maintaining or increasing range of motion.
Transcutaneous electrical nerve stimulation and Interferential Current erapy (Interferential, Premodulated, and High
Volt) for: Symptomatic relief of chronic intractable and/or management of post-traumatic or post-surgical pain.
ULTRASOUND THERAPY: Ultrasound therapy is intended to generate deep heat within body tissues for the
treatment of selected medical conditions such as relief of pain, muscle spasms, and joint contractures, but not for
the treatment of malignancies.
COMPLIANCE: e contents of this “Instructions For Use” manual are exactly the same in both the printed and electronic
forms.
08/08/2016- Rev. 0
Inventory 5D00280
All Rights Reserved
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DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL II
(801) 568-7000 / (800) 874-6251 / www.dynatronics.com
Dynatron® 25 Series™ Operation Manual
©Copyright 2016
Dynatronics Corporation
7030 Park Centre Drive Salt Lake City, UT 84121
EC
Emergo Europe
Molenstraat 15
e Hague, 2513 BH
e Netherlands
REP
0470
TABLE OF CONTENTS
Table of Contents
Section I: Introduction
Introduction to the Dynatron® 25 Series™ .............................................................................................1
Summary of Features by Device ...............................................................................................................................................1
Simplied Setup .........................................................................................................................................................................2
Language Selection ....................................................................................................................................................................2
Operator’s Prole .......................................................................................................................................................................2
Before You Treat a Patient ......................................................................................................................................................... 3
Installation and Features ........................................................................................................................ 4
Unpacking ................................................................................................................................................................................... 4
Standard Components ............................................................................................................................................................... 4
Dynatron® 25 Series Physical Features ...................................................................................................7
Channels and Jacks ..................................................................................................................................................................12
Current Limit ............................................................................................................................................................................14
Error Messages .........................................................................................................................................................................15
Ultrasound Error Messages ....................................................................................................................................................16
Lead Wires ................................................................................................................................................................................16
Testing Leads ............................................................................................................................................................................17
Carbon Electrodes ...................................................................................................................................................................18
Self-Adhesive Electrodes .........................................................................................................................................................19
Electrotherapy Information and Usage Cautions................................................................................ 21
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL III
TABLE OF CONTENTS
Section II: Operation and Treatment Instructions
Interferential / Premodulated Instructions ......................................................................................... 25
Detailed Interferential / Premodulated Setup ......................................................................................................................25
Interferential and Premodulated Modality Information ..................................................................... 29
Interferential (Quadpolar) erapy .......................................................................................................................................29
Premodulated (Bipolar) erapy ...........................................................................................................................................30
Target .........................................................................................................................................................................................30
Why Is Target Better? ..............................................................................................................................................................30
Target Sweep .............................................................................................................................................................................31
Interferential Electrode Placement ........................................................................................................................................31
Interferential / Premodulated Default Settings ....................................................................................................................31
Interferential Default Settings ................................................................................................................................................31
Premodulated Default Settings...............................................................................................................................................31
Biphasic / Russian Instructions ........................................................................................................... 32
Biphasic / Russian Quick Setup ..............................................................................................................................................33
Detailed Biphasic / Russian Setup ..........................................................................................................................................34
Biphasic / Russian Modality Information ............................................................................................ 37
Russian Stimulation .................................................................................................................................................................37
Biphasic Stimulation ................................................................................................................................................................37
Biphasic / Russian Parameters and Defaults.........................................................................................................................37
High Volt Instructions ......................................................................................................................... 40
High Volt Electrode Setup ......................................................................................................................................................40
Detailed High Volt Setup ........................................................................................................................................................41
High Volt Quick Setup ............................................................................................................................................................41
High Volt Modality Information ......................................................................................................... 45
High Volt Waveform ................................................................................................................................................................45
High Volt Settings ....................................................................................................................................................................45
High Volt Default Settings ......................................................................................................................................................46
High Volt Waveform Specications ....................................................................................................................................... 46
Ultrasound Instructions ....................................................................................................................... 47
Soundhead Warming ...............................................................................................................................................................48
Coupling ....................................................................................................................................................................................48
Head Temperature Hot Display .............................................................................................................................................49
Display Watts or W/cm2 ..........................................................................................................................................................49
Detailed Ultrasound Setup .....................................................................................................................................................50
Ultrasound Quick Setup..........................................................................................................................................................50
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL IV
TABLE OF CONTENTS
Ultrasound Modality Information ....................................................................................................... 53
Selecting the Appropriate Soundhead ...................................................................................................................................53
Penetration of Ultrasound Waves ..........................................................................................................................................54
Types of Delivery......................................................................................................................................................................55
Treatment Time ........................................................................................................................................................................55
Treatment Intensity .................................................................................................................................................................. 55
Frequency of Treatment ..........................................................................................................................................................56
Usage Cautions – Combination Treatments .........................................................................................................................56
Potential for Burns or Periosteal Pain ...................................................................................................................................56
Ultrasound Problem Solving ............................................................................................................... 58
Whirlpool Treatments .............................................................................................................................................................58
Soundhead Temperature Too Cold ........................................................................................................................................58
No Soundhead ..........................................................................................................................................................................59
Miscellaneous ...........................................................................................................................................................................59
Replacing the Soundhead .......................................................................................................................................................59
Ultrasound Specications .......................................................................................................................................................60
Ultrasound Regulation and Technical Information ............................................................................................................60
Ultrasound Beam Proles .................................................................................................................... 61
Combination erapy Instructions ..................................................................................................... 63
Comboplus™ ..............................................................................................................................................................................63
Stim rough the Soundhead ................................................................................................................................................64
Combination erapy Setup ...................................................................................................................................................65
Modify A Treatment ................................................................................................................................................................66
Combination Default Settings ................................................................................................................................................ 66
Simultaneous Treatments .................................................................................................................... 67
Set Up A Second Treatment ....................................................................................................................................................67
Modify Simultaneous Treatments .......................................................................................................................................... 67
Section III: Contraindications, Warnings, and Precautions
Contraindications, Warnings, & Precautions .....................................................................................69
Contraindications ....................................................................................................................................................................69
Warnings ...................................................................................................................................................................................69
Precautions ................................................................................................................................................................................70
Treatment Setup Warnings .....................................................................................................................................................71
Adverse Eects .........................................................................................................................................................................71
Contraindications, Warnings, & Precautions for Ultrasound Treatment .......................................... 73
Contraindications ....................................................................................................................................................................73
Precautions ................................................................................................................................................................................74
Warnings ...................................................................................................................................................................................75
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL V
TABLE OF CONTENTS
Section IV: Technical Information
Technical Information..........................................................................................................................76
Setting Defaults ........................................................................................................................................................................76
Save New Defaults .................................................................................................................................................................... 76
Restore Factory Defaults .........................................................................................................................................................77
Battery Operation ................................................................................................................................ 78
Battery Life ................................................................................................................................................................................79
Battery Life ................................................................................................................................................................................79
General Specications .......................................................................................................................... 80
Dynatron 25 Series Specications ..........................................................................................................................................80
Environmental Conditions .....................................................................................................................................................80
Safety Features of the Dynatron 25 Series.............................................................................................................................81
Care and Cleaning Instructions .............................................................................................................................................81
Suggested Maintenance Schedule ..........................................................................................................................................82
Routine Ultrasound Calibration Inspections for 25 Series.................................................................................................83
Soware Updates ...................................................................................................................................................................... 84
Returning a Unit for Repair ....................................................................................................................................................85
Denition of Symbols and Labeling ......................................................................................................................................86
Equipment Classication ........................................................................................................................................................87
Disposal of Equipment and Accessories ...............................................................................................................................87
Basic Troubleshooting Techniques ...................................................................................................... 88
Lead Testing ..............................................................................................................................................................................88
Testing Carbon Pads ................................................................................................................................................................89
CAN/CSA Waveform Requirements .................................................................................................... 90
Electromagnetic Emissions and Immunity ......................................................................................... 96
Medical Device Reporting Requirements .......................................................................................... 100
Denition of serious injury ..................................................................................................................................................100
Reporting any Incident of Patient Discomfort ...................................................................................................................101
Dynatron® 25 Series Plus Limited Warranty ..................................................................................... 102
25 Series Warranty Registration ...........................................................................................................................................103
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL VI
INTRODUCTION TO THE DYNATRON® 25 SERIES™
Introduction
™
to the Dynatron® 25 Series
e powerful and versitle 25 Series oers 3 and 5 channel devices. All channels allow fully-independent treatment setups
oering Interferential, Premodulated, High Volt, Biphasic, Russian, Microcurent, and xed frequency IFC/Premod. In
addition, the 925 and 825 include Dynatronics’ Ultrasound Comboplus feature with the power to deliver up to 5 channels
of Stim and Ultrasound - all at the same time. All of the Dynatron 25 Series models oer 1, 2, and 3 MHz frequencies for
the greatest exibility in depth of treatment. Choose 1 MHz for deep treatments, 2 MHz for moderate depth, or 3 MHz for
supercial depth.
Summary of Features by Device
Feature 925 825 625 525
Electrotherapy
IFC X X X X
Premod X X X X
Biphasic X X X X
Russian X X X X
High Volt X X X X
Combo Electrotherapy/Ultrasound X X
Ultrasound
Available Channels
Electrotherapy Channels 5 3 5 3
X X
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 1
INTRODUCTION TO THE DYNATRON® 25 SERIES™
Feature 925 825 625 525
High Volt Channel 1 1 1 1
Ultrasound Channel 1 1
Combo Channel 1 1
e 25 Series devices include the standard advantages of Dynatronics engineering, such as customizable treatments, electrode
conductance meters, and the popular Target feature. In addition all units oer the option of battery operation, making the devices
truly portable. e manufacturer’s warranty for these devices is two years (see full warranty details at the back of this manual).
is manual provides operator information and instructions for the four 25 Serises models: the 525, 625, 825, and 925.
e section that discusses Ultrasound and Combo treatments applies only to the Dynatron 825 and 925 models. All other
sections of this manual apply to all Dynatron 25 Series devices.
Simplied Setup
e design of the 25 Series top panel means treatment setup has never been easier. A few simple key presses are all you need
to fully set up a treatment. e User Interface intuitively groups and displays all the options for a modality setup on the large
LCD screen to ensure that treatment parameters can easily be selected and adjusted.
Each modality oers default settings which are automatically preset when the modality is selected—saving time in the treatment
setup. You can change these defaults to match your own most common treatment setups reducing setup time to a matter of seconds.
WARNING
Power-on the device before attaching electrodes to the patient.
Language Selection
e default language on the 25 Series Family of devices is English; however, both French and Spanish are also available. To
change the default language: 1) Begin at the START UP SCREEN. 2) Press the FUNCTION KEY. 3) Use the toggle key under
the LANGUAGE WINDOW to select the desired language. 4) Press STOP to return to the START UP SCREEN.
Operator’s Prole
All operators shall be properly trained and certied medical practitioners or those working under the direction of a licensed
medical practitioner, capable of reading and comprehending instructions for use as described in this manual. Operators will
have reasonable mobility and dexterity to attach electrodes, apply ultrasound or light therapy accessories and monitor patient
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 2
INTRODUCTION TO THE DYNATRON® 25 SERIES™
response to attended or unattended treatments. e operator should be able to hear an audible signal indicating completion
of treatments. ere should be no other limitations for operating this device.
Before You Treat a Patient
Before administering a treatment to a patient with the 25 Series devices, you should familiarize yourself with all the operating
instructions for the modality used, as well as the contraindications, warnings, and precautions for that modality. You should
also read the general information about each of the modalities provided in this manual. In addition to this information, consult
other published sources for additional application and safety instructions regarding use of each type of therapy.
CAUTION
Device should be at room temperatrue prior to treatment.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 3
INSTALLATION AND FEATURES
Installation and Features
Unpacking
When you receive the unit, immediately unpack it and all accessories and check for possible damage, obvious or concealed.
In case of damage, immediately notify the freight carrier and take any steps necessary to le a claim for the damage sustained.
Do not destroy or discard the shipping carton. e carton should be reused if the device must be shipped for any reason
including calibration. e carton is specially designed to protect the unit from shipping damage. Improper packaging of the
unit during transport can result in damage and invalidate the warranty.
Complete the warranty registration form located at the back of this manual and return it to Dynatronics within 30 days
of purchase. is is essential to insure you are not billed for services that are covered by the warranty policy. Warranty
registration should include serial numbers for both the device and soundheads.
Connect the AC power cord, which is provided as a hospital grade, UL listed plug, to a properly grounded 110/120V 60 Hz
AC outlet (the device will automatically switch to 220/240V 50 Hz when connected to a power source with that voltage).
e power cord must also be rmly plugged into the device itself. When the cord is properly connected, it cannot be easily
pulled out. Do not place the cord or the device in a place where the cord could be tripped over or accidentally pulled out of
its socket during a treatment.
Read the operating instructions in this manual before proceeding with a treatment.
Standard Components
REF e following accessories are included with the 25 Series units:
Qty Part No. Description: One of the following devices:
1 D925T Dynatron 925 5-Channel Combination Stim and Ultrasound
1 D825T Dynatron 825 3-Channel Combination Stim and Ultrasound
1 D625T Dynatron 625 5-Channel Stim
1 D525T Dynatron 525 3-Channel Stim
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 4
INSTALLATION AND FEATURES
Qty Part No. Description: One of the following devices:
1 7B0241 Power Cord (black)
1 5D00280 Operator’s Manual
1 7B0268 Protocol Reference Manual for Electrotherapy & Ultrasound (J. Stephen Guey, P.T., Ed., D.)
1 7B0284 Ultra Polys™ self-adhesive electrodes 2” x 4” (5.08cm x 10.16cm) w/ pin connector (pkg. of 4)
1 DW248 2.5” x 48” (6.35cm x 121.92cm) straps (pkg. of 2)
1 7B0191 5” x 8” (12.7cm x 20.32cm) dispersive electrode for High Volt (gray)
1 7B0201 Sponge Fabric for use with 5”x 8” (12.7cm x 20.32cm) dispersive electrodes
Dynatron 825 and 525
1 7B03020 96” (243.84cm) shrouded lead (1 red)
1 7B03030 96” (243.84cm) shrouded lead (1 black)
Dynatron 625 and 925
2 7B03020 96” (243.84cm) shrouded lead (2 red)
2 7B03030 96” (243.84cm) shrouded lead (2 black)
Dynatron 825 and 925 Ultrasound
1 7B0217 DynaGel Ultrasound Gel 100 ml sample
1 7B03040 Combo lead wires
Soundheads
e Dynatron 125 devices may be purchased with one or more applicator soundheads in the following sizes:
Part No. Size Frequencies
WSH02 2 cm2 Operates at 1, 2, and 3 MHz
WSH05 5 cm2 Operates at 1, 2, and 3 MHz
WSH10 10 cm2 Operates at 1, 2, and 3 MHz
Optional Accessories
e following optional and replacement accessories may be purchased from Dynatronics or from your Dynatronics dealer:
Part No. Description
D71BAG So Side Carrying Case
D71CART 25 Series Cart
7B0208 2" (5.8cm) diameter carbon electrodes (red)
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 5
INSTALLATION AND FEATURES
Part No. Description
7B0209 2" (5.8cm) diameter carbon electrodes (gray)
7B0063 3" (7.62cm) diameter carbon electrodes (red)
7B0065 3" (7.62cm) diameter carbon electrodes (gray)
7B0059 3" x 5" (7.62cm x 12.7cm) carbon electrodes (red)
7B0061 3" x 5" (7.62cm x 12.7cm) carbon electrodes (gray)
7B0067 1.5" x 2.0" (3.81cm x 5.8cm) carbon electrodes (red)
7B0069 1.5" x 2.0" (3.81cm x 5.8cm) carbon electrodes (gray)
7B0260 2" x 4" (5.8cm x 10.16cm) Ultra Polys™ adhesive electrodes (w/snap or pin)
7B0261 2" x 2" (5.8cm x 5.8cm) Ultra Polys™ square adhesive electrodes (w/snap or pin)
7B0077 Bifurcated extension lead wire for High Volt use
7B0082 Pin-to-Banana adapter (black)
7B0079 Banana-to-Pin Adapter (black)
7B0001 Snap adapter
5LTRGEL Ultrasound Coupling Gel (5 liter container)
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 6
DYNATRON® 25 SERIES PHYSICAL FEATURES
Dynatron® 25 Series
Physical Features
Before operating the Dynatron 25 Series devices, acquaint yourself with the control panel by reviewing the illustrations and
descriptions on the following pages. e numbered features in the diagrams correspond to the numbered descriptions.
Before administering treatment to a patient, read the sections later in this manual that provide specic instructions for
performing treatments, discussions of each modality, denitions of the available options, along with contraindications,
warnings, and precautions for all modalities.
Note: e User Interface on the 25 Series devices is engineered with “CapSense Touch Technology” requiring that the user
make direct contact with the keys on the faceplate with bare ngers or the use of a glove with a conductive ngertip.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 7
DYNATRON® 25 SERIES PHYSICAL FEATURES
1. START: Press the green START key on the right side of the Treatment Display Screen to start the treatment timer
and treatment proceeds as set up.
e START key can also be used to save new treatment DEFAULT settings. Aer setting up a treatment, press
and hold the START key for two seconds. At the end of two seconds, a beep will sound indicating the treatment
parameters have been saved. e next time the modality is selected, these parameters will be selected automatically.
2. STOP: Pressing the red STOP key during a treatment IMMEDIATELY stops the output and sets the treatment time
to zero for all modalities. To stop only the focus treatment, reduce the focus treatment’s time to zero.
3. PAUSE: e PAUSE key is designed to pause Ultrasound treatments.
4. FUNCTION: is key is used to access unique features for High Volt, Ultrasound, Combo treatments and for
entering soundhead parameters. e FUNCTION key is also used in conjunction with the STOP key to stop only
a treatment in focus. In addition, the FUNCTION KEY provides access to settings for STIM, LANGUAGE, LEAD
TESTS AND SYSTEM INFORMATION. Specic instructions for using this key are provided later in the manual as
they apply to each function or modality.
5. TREATMENT DISPLAY SCREEN: Located in the upper center of the USER INTERFACE, the TREATMENT
DISPLAY SCREEN allows the clinician to view all of the parameters of the focus treatment such as time, intensity,
frequency, duty cycle, contraction rest, ramp time, polarity, or any other setting applicable to a treatment at a glance.
In addition, the screen lists all active modalities not in focus along with their active channels and remaining treatment
times in small font under the heading RUNNING TREATMENTS. If an error occurs during treatment, an error message
will appear on the Treatment Display Screen identifying the treatment modality that triggered the error message.
6. ARROW KEYS: e UP/DOWN arrow keys are used to increase/decrease the treatment time or other parameters
that appear on the TREATMENT DISPLAY SCREEN directly next to the arrow keys being used.
7. MODALITY KEYS: e 25 Series devices have the following treatment modality options: IFC, Premod, Ultrasound,
Combo, Biphasic, Russian, and High Volt. MODALITY KEYS appear at the bottom of the USER INTERFACE.
Pressing any of the available MODALITY KEYS will bring the selected modality into focus and the default parameters
for that treatment modality will be displayed. Treatment modality parameters may be customized once the treatment
is in focus.
8. TREATMENT WINDOWS: Across the bottom of the TREATMENT DISPLAY SCREEN are ve smaller treatment
windows providing treatment options and parameters that are unique to each modality. e quick access and
visibility of these TREATMENT WINDOWS allow for quick, easy, and accurate setup. On the following pages are
illustrations of each modality’s TREATMENT WINDOWS and their associated default settings.
Note: High Volt, Sound, and Combo treatments all have a secondary set of TREATMENT WINDOWS and treatment
options that are accessed when the treatment is in focus and the FUNCTION key is pressed. e arrow between the
two boxes indicates the secondary treatment window.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 8
DYNATRON® 25 SERIES PHYSICAL FEATURES
IFC (Interferential) Premod
Biphasic Russian
SOUND (Ultrasound) SOUND (Function Key View)
COMBO (Combination) COMBO (Function Key View)
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 9
DYNATRON® 25 SERIES PHYSICAL FEATURES
HIVOLT (High Volt) HIVOLT (Function Key View)
9. TREATMENT WINDOW TOGGLE KEYS: TOGGLE KEYS are located below the ve TREATMENT WINDOWS.
Pressing the toggle key directly below a window allows the one to choose an output channel, and select treatment
parameters for a treatment in focus. A treatment is in focus when the name of the treatment appears in the center of
the TREATMENT DISPLAY SCREEN.
10. CHANNELS WINDOW / CHANGING THE FOCUS TREATMENT
e lights in the CHANNELS window indicate which output channels/jacks are currently in use. e channel(s)/jack
illuminated in GREEN indicates the focus treatment and the time, intensity, and other treatment parameters for that
active treatment appear on the Treatment Display Screen. A solid YELLOW light indicates a channel/treatment is in
use and delivering current, but the intensity, and treatment parameters are not displayed at this time (only one
channel’s parameters may be displayed at a time). A treatment’s parameters may only be modied when the treatment
is brought into focus. To bring a treatment into focus, press the CHANNELS TOGGLE key below the CHANNELS
window to select a channel to be brought into focus. If a treatment that is active but not the focus treatment times-out,
the text in the CHANNELS window will change from YELLOW to WHITE.
11. TARGET PAD: ere’s no easier, more ecient way to focus treatment precisely where it’s needed! Simply glide
your nger across the TARGET touch pad to move the center of interference to the site of your patient’s pain. e
patient’s input will help direct you. When you li your nger from the Target pad, the selected point is locked until
you change it again.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 10
DYNATRON® 25 SERIES PHYSICAL FEATURES
12. CONDUCTANCE/TEMPERATURE BAR
Conductance.
e 25 Series devices continuously measure conductance during electrical Stim treatments for Interferential, and
Premod to ensure that the treatment outcome is optimal and to minimize the possibility of patient discomfort due
to poor conductance and/or changes in current density. As conductance is measured, 25 Series displays the results
in graph form on the CONDUCTANCE bar located on the right side of the TREATMENT DISPLAY SCREEN.
Optimum conductance is displayed as the conductance bar ows RED - YELLOW- GREEN. GREEN indicating
the best CONDUCTANCE. If the green bar only partially lls the graph area, the conductance is at a percentage
of optimum. Lower INTENSITY may cause the bar to partially ll, but does not mean that the treatment is not
eective. Below are some helpful denitions.
Conductance and Worn Electrodes.
Conductance is how readily electrical current is passed from the electrode to the skin surface during a treatment.
Conductance aects current density. A worn electrode that does not conduct the current evenly over its entire
surface will have “hot spots” where a greater amount of current ows through a smaller area which means the
current density is higher at that point than elsewhere on the electrode. “Hot Spots” can lead to patient discomfort.
Never risk patient comfort by using worn electrodes or lead wires.
Intensity.
e intensity level is a convenient incremental measurement. However, raising the intensity increases the current
delivered to the patient but does not improve conductance.
Current Density.
Current density is the amount of current that passes through a given area of the electrode. Current density varies
depending on the size of the electrode, the conductance, and intensity setting; and has an eect on patient comfort.
With proper setup and good accessories, current is dispersed evenly over the entire surface of the electrode. e
smaller the electrode, the greater the density of the current delivered through the area. To reduce current density and
improve patient comfort, use larger electrodes, or lower the intensity setting, or both.
If the number of green displayed segments begin to decrease on the graph during a treatment, it is important to
determine the cause of the poor conductance. Remember with poor conductance you may inadvertently increase
current density at a small point under the electrode and cause patient discomfort. Following are some considerations
to insure proper conductance.
• Check to be sure electrodes are not worn or that self-adhesive electrodes have not lost their adhesiveness. ese
are the most common causes of poor current delivery. Both self-adhesive and carbon electrodes eventually lose
their ability to conduct current eectively. See “Electrotherapy Usage Cautions” in this manual for recommended
intensity settings and usage limits.
• Check to ensure the entire surface of the poly adhesive electrode is adhering.
• Self-adhesive electrodes do not require sterilization, however, electrodes should be clean and hydrated (see
package instructions or “Self-Adhesive Electrodes” section of this manual).
• Check to be sure the snap adapters haven’t fallen o or that the lead wire has not become disconnected from the
electrodes or the device.
• Make sure carbon electrodes have a secure connection with the pin ends of the leads. Over time the carbon
electrodes may become too loose to use safely and the electrodes must be replaced.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 11
DYNATRON® 25 SERIES PHYSICAL FEATURES
• Check for corrosion on lead ends.
• Make sure carbon electrodes are adequately moistened and free from build-up to allow complete contact across
the surface of the electrode.
• Observe the electrode placement. Some areas of the patient’s body conduct current better than others. In areas
where resistance is high you may be unable to obtain optimum conductivity.
• Check the dryness of the patient’s skin. Dry skin does not conduct current well.
• Check to see if the electrodes do not adhere properly when a patient shis position during a treatment. Worn
electrodes could become loose and a signicant change in conductance could result.
Temperature.
e 25 Series devices continuously measure temperature during Ultrasound, and C ombo Treatment. TEMPERATURE
is indicated by the length of the Blue/Green indicator lights on the temperature bar. e longer the length of the
colored bar, the higher the temperature. It is not uncommon to have the temperature bar move into the medium
length ranges. If the temperature approaches the maximum level of 108° Fahrenheit (42.22° Celsius), the treatment
is automatically PAUSED, output power stopped, and treatment time stops counting down. Following a cooling
period, the treatment may be continued by pressing START.
Channels and Jacks
13. Front Panel Channels and High Volt Jack
Illustrated below are the dual-channel banana jacks for delivering Interferential, Premodulated, Russian, and Biphasic
treatments. ese channels are located on the front of the device. As you face the device, channels 1 and 2 are on the
le, channels 3 and 4 are on the right with the dedicated High Volt jack for delivering High Volt Pad treatments in
the middle. ree channel units (525 and 825) have channels 1, 2, and High Volt only.
Front Panel Channels and Jack
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 12
DYNATRON® 25 SERIES PHYSICAL FEATURES
14. Le-Side Panel Jacks
SD Card Input. Located on the le-side of the 25 Series devices is the SD Card Input. e SD Input provides a way
for the 25 Series Devices to receive soware updates quickly and easily. Complete instructions for updating the
devices using an SD card are found in the “Technical” information section of the manual.
15. Right-Side Panel Jacks
Le-Side Panel Jacks
Located on the right-side of the 25 Series are the Ultrasound, Combo Stim Probe Jacks. Non-ultrasound devices
(525 and 625) have no input jacks on the right-side panel.
Right-Side Panel Jacks
Input (ElectroStim Combo Jack).
e special combo lead wire for combination treatments is plugged into this jack for a combination treatment setup
providing Stim output through the Ultrasound head. e Combination Treatment (Combo) Jack is a simple banana
jack connector and requires no special alignment.
Ultrasound Jack.
e Ultrasound Jack is a keyed jack with a “D” shaped conguration. Align the straight bottom of the jack and the
round top that matches the conguration found on the Ultrasound cord. Do not force or twist the connector or
damage to the pins may occur. When removing the connector, pull the connector’s outer sleeve directly away from
the chassis. When an Ultrasound probe is connected, the device console will update the probe calibration data. No
user inputs will be required to update calibration data.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 13
DYNATRON® 25 SERIES PHYSICAL FEATURES
Back Panel Jacks
a. POWER CORD ENTRY MODULE. is entry module is designed to accommodate a hospital-grade
power cord.
b. Power 1/0 (ON/OFF) Switch. Located on the back of the unit this switch is labeled “1” and “0.” Set the switch
to “1” for ON; set the switch to “0” for OFF.
c. B attery. is 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.
a b c
Back Panel Jacks
NOTE: Patient Remote Stop. Adding the Remote Stop requires a custom order. e Patient Remote Stop Jack is
located below the Light Probe holder. e remote stop is controlled by the patient during unattended therapy, allowing
the patient to stop the treatment at any time. When the button on the remote stop cable is pressed, output for all Stim
modalities and pad treatments is stopped. During Combo treatments, both Sound and Stim outputs are stopped.
Current Limit
e Dynatron 25 Series devices continuously measure the actual current output during IFC and Premod treatments and
limit the output current to the level set for the device. As the intensity of a treatment is increased the current output is also
increased.
When the maximum output current limit is reached, the device will immediately stop increasing the intensity and
automatically reduce the intensity a few increments to prevent the possibility of patient discomfort. Simultaneously, the
device will beep and one of the following CURRENT LIMIT WARNINGS will appear in the lower right-hand corner of the
Treatment Display Screen. Following is a list of CURRENT LIMIT WARNINGS that may occur.
Remember to treat at the patient’s comfort level. It is not important to reach a given intensity level. It is only
important to set the treatment at a level that is comfortable to the patient. See “Electrotherapy Usage Cautions” in
this manual for suggested intensity limits.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 14
DYNATRON® 25 SERIES PHYSICAL FEATURES
CURRENT LIMIT ERROR MESSAGES CAUSE
“Cannot start treatment with zero intensity” Intensity not set
Error 101, Error 111, Error 120, Error 130
“Lead error: current too low!
Please check or replace your leads and pads!”
Lead issue; electrode issue
Error 100, Error 110, Error 140
“Lead error: High current delivery detected. Adjusting intensity
to a safe limit. Please check leads. Space electrodes further
apart. Ensure skin is dry between electrodes.”
Electrodes touching or too close
Hot pack may be too moist
Lead shorted
Most warnings will occur during the setup portion of a treatment. It would be rare to encounter a current limit warning during
a patient treatment as reaching the current limit would require an intensity setting that is uncomfortable and intolerable to
most patients. Below are some possible considerations for exceptions:
• e patient is unable to adequately feel the current and is unable; therefore, to report discomfort at the high intensity level.
• When using four large electrodes for a treatment, current is dispersed over a larger electrode surface area permitting
a higher intensity setting without discomfort to the patient.
• For users who need to provide intensity levels above 50mA (not available Japan or Canada), the default may be
changed to 100mA: 1) Begin at the START UP SCREEN. 2) Press the FUNCTION KEY. 3) Use the toggle key under
the MODE WINDOW to select the 100mA option and conrm your choice when prompted. Press STOP to return
to the START UP SCREEN.
As the intensity is increased, ensure that the patient feels the current as expected. If the patient is unable to feel the current,
the current could unintentionally be raised to a level much too high and risk causing unnecessary discomfort or possibly
burn the patient. Keep the intensity very low if the patient has little or no feeling in the treatment area (see “Contraindications, Warnings, and Precautions” in this manual). If you encounter the Current Limit Warnings, it may indicate that the
patient cannot adequately feel the current. Reduce the intensity immediately.
A wide range of factors can cause the patient to lack sucient feeling in the treatment area, including, but not limited to, pain
control drugs, use of ice packs, neurological damage, etc.
Always consider these and other factors when delivering an electrotherapy treatment. Determine intensity settings based
upon your medical expertise and judgment.
Error Messages
If an error occurs during any active treatment, whether in or out of focus, the 25 Series will sound a beep. A white box with a red
Error message will appear in the Time area of the Treatment Display Screen, if the treatment is in focus. If the treatment error is
associated with a treatment that is not in focus, “ERR” will appear next to the active treatment listed on the le-hand side of the
screen with other treatments that are currently running but not in focus. Pressing the modality key for the treatment indicated
will bring that treatment into focus and details regarding the error will appear on the Treatment Display Screen.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 15
DYNATRON® 25 SERIES PHYSICAL FEATURES
Ultrasound Error Messages
ULTRASOUND ERROR MESSAGES CAUSE
Lead Wires
DID YOU KNOW?
• Lead wires should be replaced at least every six months
“No soundhead connected,
cannot setup ultrasound/combo treatment.”
“Soundhead is too hot!
Output has been disabled to allow cooling.”
“Caution: soundhead is getting hot!” Soundhead is getting hot
“Thermistor on soundhead is broken!
Please get soundhead replaced.”
No soundhead attached
Soundhead is too hot
Thermistor on soundhead is broken
• Carbon electrodes should be replaced approximately every six months
• Self-adhesive electrodes should be replaced aer no more than 15 uses
• You should never use monitoring electrodes nor ordinary TENS electrodes with this device
• Some brands of electrodes are of very poor quality or are inappropriate for electrotherapy. Your patient
may experience discomfort and even skin reaction due to poor distribution of current when using these
electrodes
• Failure to replace worn lead wires and carbon electrodes or using cheap, poor quality electrodes are some
of the most common causes of patient discomfort.
Even with good care, lead wires will eventually develop breaks (open connections) simply from normal usage, and must
be replaced about every six months. Damage can occur due to jerking or pulling on the wires, excessive bending or tight
wrapping the wires, or running over the wire with a device cart. When setting up treatments, keep lead wires out of areas
where a person could trip on them. When storing, lead wires should be loosely wrapped to prevent any kinking in the lead
wire. Never use worn or damaged leads to treat a patient. Using faulty leads may result in injury to a patient.
Test Leads Daily
Lead wires should be tested regularly to ensure they are functioning properly and safely. A simple test performed with the
Dynatron 25 Series devices makes daily lead testing convenient. Damaged or worn leads should be discarded and replaced.
Instructions for testing are provided below.
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DYNATRON® 25 SERIES PHYSICAL FEATURES
Remove Corrosion From Lead Tips
Lead tips will build up corrosion through use. e lead tips must be cleaned and kept free of corrosion in order to function
correctly. To remove corrosion from lead tips, use steel wool to gently scrape o 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.
Testing Leads
To test leads, perform the following steps daily.
1. Power on the 25 Series.
2. When the device has completed INITIALIZING, press the FUNCTION key located on the right side of the USER
INTERFACE to activate the SETTINGS screen.
3. Make sure that LEAD TEST is illuminated GREEN in the MODE window.
4. Using the LEAD TEST TOGGLE KEY, select ON in the LEAD TEST window. ON will be illuminated GREEN.
5. Plug a lead into Channel 1 (no other channel is used for the lead test). Remove snap adapters, if applicable, from the leads.
WARNING
UNDER NO CIRCUMSTANCES SHOULD THE LEADS BE CONNECTED TO A PATIENT DURING THIS TEST!
6. Press START.
7. Hold the pins securely together, move the leads around, wiggle the cord, especially at the jack end of the cord. e
numbers in the CONDUCTANCE window will begin to count up. e quality of the lead is represented on a rolling
scale of 0 to 250. e higher the number the better the lead’s quality. A count of 200 or more indicates the lead is
ready to be used. If the count registers under 100, the leads are probably bad and should be replaced.
8. Aer the test, remove the lead from Channel 1. If other leads need to be tested, plug in the next lead and test in the
same way.
9. To exit the LEAD TEST function, press the STOP key.
NOTE: e LEAD TEST should be used for testing patient lead wires only. is 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.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 17
DYNATRON® 25 SERIES PHYSICAL FEATURES
Carbon Electrodes
is type of electrode lasts a long time and can be used again and again. However, if they are not properly cared for, these
electrodes can fail to deliver the desired treatment and can present the possibility for injury to a patient. To ensure greatest
safety and eectiveness with your treatments, follow these rules when using carbon electrodes.
1. Carbon electrodes must be well-moistened prior to treatment setup.
Dry carbon electrodes are very poor conductors of current and should NEVER be used. ey may be moistened
with either water or an electrolyte spray. Water is adequate for short treatments, but will evaporate too quickly for
longer treatments. If water is used for longer treatments, you may need to interrupt the treatment and remoisten
the electrodes. A special sponge fabric available with some carbon electrodes may be moistened well and used as a
conductive medium (do not use ordinary sponges for this purpose). Do not use Ultrasound gel as a conductive agent
with carbon electrodes.
If you use an electrolyte spray, this liquid may be diluted with equal amounts of distilled water, if desired. is
reduces the amount of build-up on the electrodes yet usually provides adequate moistening of the electrodes.
NOTE: As you increase the intensity to higher levels during setup, if your patient feels a “biting” sensation or if the
patient feels nothing, this indicates you are not getting adequate conductivity—the electrode may be too dry or is
not moistened evenly across its entire surface. Stop the setup and correct the problem.
2. Carbon electrodes must be free from any build-up.
If electrodes have a build-up from body oils or a moistening agent such as an electrolyte spray, conductivity is greatly
impaired. If treatment is allowed to continue, intensity could be inhibited. When using carbon electrodes with any
electrotherapy device, you must make sure conductivity is not impaired due to any type of build-up on the electrodes.
3. How to Clean Carbon Electrodes.
Carbon electrodes from Dynatronics may be cleaned using a mild soap and a small brush (such as a nail brush). To
sterilize, alcohol may be used. ey may also be sterilized in an Autoclave. Daily cleaning is recommended
If seeking a commercial cleanser/disinfectant, it is recommended that a product contain only the following active
ingredients to avoid damage to the probe or pads:
OctylDecyl Dimethyl Ammonium Chloride
Dioctyl Dimenthyl Ammonium Chloride
Didecyl Dimenthyl Ammonium Chloride
Alkyl (C14 50%; C12 40%; C16 10
Dimenthyl Benzyl Ammonium Chloride
Other Ingredients not published
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 18
DYNATRON® 25 SERIES PHYSICAL FEATURES
4. Carbon electrodes eventually wear out.
Do not assume you can safely use carbon electrodes indenitely. Over time these electrodes will wear; and when worn,
the amount of current delivered through the electrode will decrease and will be inconsistent over the surface of the
electrode. As a general rule, carbon electrodes that are used regularly should be replaced at least every six months.
Do not take chances with patient safety!
Discard worn carbon electrodes!
If you think that your carbon electrodes are showing wear, you can test them with an ohm meter. Good carbon electrodes
should measure resistance between 40 and 200 ohms.
Self-Adhesive Electrodes
Dynatronics’ self-adhesive electrodes are intended for multiple but patient specic use due to the danger of cross
contamination. Improper use of the electrodes can decrease the life of the electrode and could even result in harm to your
patient. e following instructions will help you achieve maximum usage from your electrodes while ensuring patient safety
and comfort during treatment.
1. Make sure the electrode is adhering and making contact with the skin across the entire surface of the electrode.
Electrodes will lose their adhesive quality when exposed to air, dust, dry skin, etc.
To Retain Adhesiveness:
• Electrodes should be stored in a tightly sealed pouch until used.
• e patient’s skin should be thoroughly cleaned and free from oils or akiness prior to placing the electrodes.
To Restore Adhesiveness:
• Before a Treatment. Before placing the electrode on the patient, moisten the patient’s skin with a damp cloth
using plain water, then apply the electrode to the skin.
• Aer a Treatment. Apply one or two drops of water to the adhesive side of the electrode using plain water, rub
it lightly with ngertips, reapply the electrode to its plastic backing, and seal it tightly in its storage pouch. Do
not use an electrolyte spray to remoisten self-adhesive electrodes as this substance can destroy the adhesive.
Self-adhesive electrodes do not require sterilization.
• With this method of re-hydration, aer a couple of hours electrodes can regain up to 90 per cent of their original
adhesive quality.
2. NEVER use a self-adhesive electrode for more than 15 treatments (maximum).
3. NEVER USE STRAPS, WEIGHTS, or other devices to attach self-adhesive electrodes to the skin. If an electrode
has lost its adhesive quality, you can use one of the methods given above to re-hydrate the adhesive, or you should
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 19
DYNATRON® 25 SERIES PHYSICAL FEATURES
discard the electrode. Using straps and weights with self-adhesive electrodes could have an unpredictable eect on
the electrodes and could cause injury.
4. NEVER use monitoring electrodes such as ECG, or EMG, nor ordinary TENS electrodes.
5. If you see the “No Patient Current” screen message, or if you observe poor conductivity indicators, check the
electrodes and lead wires for proper connection.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 20
ELECTROTHERAPY INFORMATION AND USAGE CAUTIONS
Electrotherapy
Information and
Usage Cautions
e following general warnings are to be observed during Interferential, Premodulated, Russian, Biphasic, and High Voltage
stimulations.
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. Leads and electrodes must only be
applied to the patient before a treatment is started.
• Never use worn or damaged leads or electrodes as these may result in injury to the patient.
• See the Contraindications, Warnings, and Precautions for Interferential and Premodulated treatments in this
manual before administering a treatment.
• Additional warning from the Canadian Health and Welfare Department, Health Protection branch:
WARNING: oracic applications are contraindicated. Cardiac brillation may occur if output current is 50mA
RMS or greater for any output circuit. (For use in Canada and Japan, this device is limited to 50mA output).
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. A patient’s tendency to have adverse reactions is dependent upon several
factors. ese factors are:
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 21
ELECTROTHERAPY INFORMATION AND USAGE CAUTIONS
Current Density
is is the amount of current being delivered to the patient divided by the area through which the current is being delivered
(the surface area of the electrodes being used).
Electrode Condition
Worn or dried out electrodes cause the current to concentrate in small areas of the electrode instead being evenly distributed
over the entire surface of the electrode. is has the eect of concentrating and increasing the current density into small
areas.
Patient Susceptibility
Some patients’ skin is more sensitive to electrotherapy currents. is can cause a reaction similar to a heat rash.
Electrotherapy treatment can result in a rash, burn, or blister. e tendency to do this is dependent upon the factors listed
above and can be minimized by applying the following guidelines:
1. Use only moderate current
It is not always necessary to raise the treatment intensity to just short of the patient’s pain threshold to achieve
adequate results. Below is a chart comparing the size of the self-adhesive and carbon electrodes with their suggested
maximum intensity levels.
NOTE: e intensity settings should be considered maximum and not target intensities. ese 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.
For Biphasic or Russian stimulation treatments intended to eect a muscle contraction, it may sometimes be
necessary to exceed these recommended limits to achieve the desired results. However, use caution when doing so to
ensure that the patient can feel and can comfortably tolerate the electrical current. Also observe all other precautions
in this section concerning leads and electrodes to ensure the higher intensity setting is not necessary as a result of
defective accessories. In any case, do not exceed patient tolerance in setting the intensity. Consult published medical
literature for more information about treatment protocols using each of these electrotherapy modalities.
Use as large an electrode as is practical for the application.
NOTE: e current density in a 1.25" square electrode is over FOUR TIMES the current density in a 1.75" by 3.75"
electrode for the same intensity setting. Using larger electrodes allows current to be delivered over a larger area of
the body keeping the current density as low as possible and minimizing the possibility for adverse reactions. Below
are recommended intensities that correspond to electrode sizes.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 22
ELECTROTHERAPY INFORMATION AND USAGE CAUTIONS
Interferential / Premodulated
Electrode Size Maximum Recommended Intensity
Carbon
Electrodes
1.75" x 3.75" (4.45cm x 9.53cm) 25 - 30
Self-adhesive
Electrodes
When delivering combination Ultrasound and Stim treatments where the Stim current is delivered through the
soundhead, the following are the recommended maximum Stim intensities (refers to Premodulated, Biphasic or
Russian stimulation only):
3" round (7.62cm) 25 - 30
3" x 5" (7.62cm x 12.7cm) 30 - 40
1.75" square (4.45cm) 10 - 15
1.25" round (3.18cm) 10 - 12
2" round (5.08cm) 10 - 20
3" round (7.62cm) 25 - 30
Combination Treatment
Ultrasound Head Size Maximum Recommended Intensity for Electrotherapy
2 cm2 Head 2 - 4
5 cm2 Head 8 - 10
10 cm2 Head 15 - 20
2. Ensure that the area on the patient’s skin where the electrode is to be placed is clean and free of all foreign matter.
Includes powders, perfumes, as well as body oils, dirt, and grime. Cleaning with an alcohol wipe should be adequate.
Allow the alcohol to fully evaporate before applying the electrodes. Iontophoresis occurs with all electrical current therapies
and can drive any of the above-surface contaminants below the epidural layer where an allergic reaction may occur.
Any electrode which is suspect should be discarded. It’s not worth the price of an electrode to risk harming a patient.
3. Make sure the electrodes being used are in good condition.
e poly adhesive electrodes should have good adhesion over the entire surface area of the electrode. e area where
the leads attach to the electrode (either through a lead or a snap) should not be damaged such that the connection to
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 23
ELECTROTHERAPY INFORMATION AND USAGE CAUTIONS
the foil backing behind the adhesive is broken. Carbon electrodes should be deep black and should be free of cracks
in the electrode surface.
4. Some patients tend to be much more sensitive to electrotherapy treatments.
On patients with this tendency, treat with reduced intensity and/or shorter treatment times with possibly more
frequent treatments, if required. Most reactions are localized and very short-lived, so limiting the exposure should
minimize any potential for adverse reactions.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 24
INTERFERENTIAL / PREMODULATED INSTRUCTIONS
Interferential / Premodulated
Instructions
An Interferential treatment uses two channels and four electrodes (channel pairs 1-2 or 3-4). e device will automatically
select the rst available channel pair when you select IFC. A Premodulated treatment uses one channel and two electrodes.
e device will automatically select the rst available channel (1, 2, 3, or 4) when PREMOD is selected. If desired, multiple
treatments can be setup using available channels. Note: Channels 3 and 4 are only available on the 925 and 625 devices.
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. Consult published sources for electrode
placements, treatment settings, and treatment times. Make sure electrodes make good contact with the patient’s skin
over the entire surface area of the electrode. Improper electrode contact may result in patient injury.
Detailed Interferential / Premodulated Setup
1. IFC or PREMOD MODALITY keys
Press the IFC or PREMOD MODALITY keys to choose IFC (Interferential) or PREMOD (Premodulated). When
you choose IFC, two channels are automatically selected: 1-2 or 3-4. When choosing PREMOD, the rst available
single channel is selected. Make sure the patient lead(s) is plugged into the correct jack(s) for the channel(s) selected.
e default settings for the modality are automatically selected. If you wish to use the default settings, increase the
intensity to the desired level, and press START.
Default Settings
Time:..........................................10 minutes
Frequency Range: ...........High 80-150 Hz
Target (IFC): .......................................... On
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 25
INTERFERENTIAL / PREMODULATED INSTRUCTIONS
If you wish to change or customize the treatment settings, proceed through the following steps:
2. Customize TIME
e default treatment time is displayed at 10:00 min. Use the TIME arrow keys to increase or decrease the treatment time.
3. Customize FREQUENCY (optional)
Default HIGH and LOW Frequency Settings
• HIGH range is 80 to 150 Hz.
• LOW range is 0 to 10 Hz.
• ALTERNATING range alternates every 30 seconds between HIGH and LOW, beginning with LOW.
NOTE: ALTERNATING and HIGH/LOW options may be selected aer pressing START. However, Consecutive
and Fixed options must be selected before pressing START.
• CONSECUTIVE HIGH/LOW. During the rst half of the treatment time the High frequency range is delivered.
During the second half of the treatment time the Low frequency range is delivered.
NOTE: Make any desired changes to the treatment time before selecting Consecutive. Treatment time changes
made aer selecting Consecutive will cause the treatment to revert to an ALTERNATING HIGH/LOW treatment.
• FIXED. A FIXED treatment automatically defaults to a STATIC setting. Press the toggle key under MODE until
FREQ is illuminated. A FIXED treatment can be set between 4,000 and 10,000 KHz. Selections progress from
4,000 KHz to 10,000 KHz in 1,000 KHz increments. Once the FIXED rate is set, return to the TIME display by
using the MODE toggle key.
NOTE: If INTENSITY has been set during the setup of a FIXED treatment option and a change is made to any
other treatment option, INTENSITY will automatically return to “0.”
e default High and Low frequency settings may be changed for a single treatment if desired, or new default settings
may be saved to apply to all future treatment setups.
• Press the toggle key under the MODE display. Select FREQ (Frequency).
• Press the toggle key under the RANGE display. Select a HIGH or LOW frequency range.
• e HIGH Frequency will appear on the le-hand side of the Treatment Display Screen. e LOW Frequency
will appear on the right-hand side of the Treatment Display Screen. Changes to the upper and lower limits are
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 26
INTERFERENTIAL / PREMODULATED INSTRUCTIONS
made using the arrow keys to the side of each displayed setting. If you set both displays to the same value, the
treatment will be delivered at that single frequency rather than sweep through a frequency range.
• Aer pressing START, frequency settings will remain in eect for the duration of the treatment. If you save defaults
during this treatment, the new frequency settings you have entered become the defaults for this modality. However,
if you do not save the new settings, the unit will return to the current default settings for the next treatment.
• To SAVE these CUSTOM FREQUENCY settings, hold the START key down until a beep sounds. Once saved,
these settings will be used on all IFC or Premod treatments that follow.
• Press the toggle key under the MODE display to return to the TIME display, Aer 10 seconds with no key
presses, the Time display will automatically return.
4. Choose TARGET, SWEEP, or STATIC (for Interferential only)
Using the toggle key located under the TARGET display make your selection from the three available options.
TARGET. Pinpoint the treatment site delivering the full Interferential current where it is needed.
NOTE: e intensity must be set before using the Target Pad so the patient will be able to indicate when the
treatment site is found. Also remember, an injured area will oen be more sensitive to the current delivered.
erefore, an intensity setting that is comfortable to the patient at rst may feel uncomfortable when the treatment
site is found using the TARGET PAD. If necessary, reduce the intensity to the patient’s comfort level.
SWEEP. e interferential current randomly sweeps the treatment area within the electrodes allowing the general
area to be bathed with Interferential current.
STATIC. e interferential current focuses only on the point where the current between electrodes intersects as it
follows the path of least resistance.
5. INTENSITY
Press the UP/DOWN arrow keys located next to the INTENSITY display on the right-hand side of the Treatment
Screen. When the INTENSITY is increased, current to the patient begins. NOTE: e CONDUCTANCE BAR
GRAPH will be operable at this time.
Before selecting the intensity setting for an individual patient, see “Electrotherapy Information and Usage Cautions”
in this manual for recommended intensity settings. Also see the section of this manual entitled “Contraindications,
Warnings, and Precautions” for specic precautions when treating any conditions contributing to loss of sensation,
or any time the patient cannot feel the electrical stimulation.
6. Press START
When you press start, the treatment timer in the TIME display window begins counting down and the treatment
proceeds. Remember to set the intensity before pressing START.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 27
INTERFERENTIAL / PREMODULATED INSTRUCTIONS
7. SAVE DEFAULTS
If the treatment you have just set up is a frequently used, you can save the treatment parameters as new defaults by
pressing and holding the START key until a beep sounds indicating the treatment parameters have been saved. e
next time you select the modality, these parameters will be selected automatically.
8. MODIFY SETTINGS
Treatment settings can be modied while the treatment is in progress except for a CONSECUTIVE HIGH/LOW
treatment. If the TIME setting on a CONSECUTIVE HIGH/LOW treatment is altered, the treatment will be aborted
and default to an ALTERNATING HIGH/LOW treatment.
• FREQUENCY RANGE. Use the Range Toggle key to select a dierent frequency option (High, Low, Alternating
High/Low, Consecutive High/Low, or Fixed). Fixed Frequency and Consecutive High/Low cannot be selected
aer treatment is started.
• TARGET/SWEEP/STATIC. Use the Target Toggle key to select Target, Sweep, or Static (for IFC only).
• TIME. Use the Time Arrow keys to increase or decrease the treatment time.
• INTENSITY. Use the Intensity Arrow keys to increase or decrease the intensity.
• TARGET. Relocate the treatment site by touching the TARGET PAD at any time during the treatment when
TARGET has been selected.
9. STOP.
When the treatment time has elapsed, the current to the patient stops and a tone sounds signaling the end of a
treatment. Treatments in progress may be stopped at any time using one of the following methods.
Stop One Treatment Only. Press and hold the FUNCTION key and press STOP. is stops only the treatment in focus.
Stop All. Press the STOP key. All treatments at all channels will stop.
Stop Time. Reduce the treatment time using the Time arrow key. e output at the selected channel is stopped,
and the device then displays the parameters for the next treatment that remains in progress (if there is an active
treatment).
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 28
INTERFERENTIAL AND PREMODULATED MODALITY INFORMATION
Interferential and Premodulated
Modality Information
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 4000 to 4150 Hz. e paths of these two currents cross resulting in a “beat” that
produces the therapeutic frequency at the treatment site.
e resulting frequency is between 1 and 150 Hz. An example of wave forms representing these currents is illustrated here.
In the Interferential mode, two output jacks (Channels 1 and 2, or 3 and 4) are utilized with four electrodes placed in a
crisscross fashion, “bracketing” the treatment site. e output from Channel 1 (or Channel 3) is the constant 4000 Hz wave,
while the output of Channel 2 (or Channel 4) is the variable 4000 to 4150 sine wave.
e “beat” phenomenon. Two waves of dierent frequencies over 4000
Hz, combine to produce a beat which is between 1 and 150 Hz.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 29
Stimulation produced by 4 electrodes.
INTERFERENTIAL AND PREMODULATED MODALITY INFORMATION
Premodulated (Bipolar) Therapy
Premodulated therapy utilizes one output jack and two electrodes. e current delivered is a composite wave form. In order
to produce this composite current, two Frequencies are “mixed” within the device prior to output. One frequency is 4000 Hz
while the second frequency covers a range between 4000 to 4150 Hz.
With the Dynatron 25 Series devices, any of the four channels may be used simultaneously to deliver up to four separate,
independent Premodulated treatments. A crisscross electrode setup pattern should not be used when setting up multiple
Premodulated treatments. Note that a Premodulated treatment usually requires a lower intensity setting than an Interferential
treatment since current is dispersed to only two electrodes rather than four (a smaller total coverage area means greater
current density at the treatment site).
Target
e Dynatronics’ TARGET (available for Interferential treatments
only) simplies placing the interferential beat directly on the
treatment site. e movement of the nger on the Target paid along
with the feedback supplied by the patient allows the user to place the
full force of the interferential “beat” directly on the treatment site
regardless of conductance variations caused by dierences in human
tissue (skin, muscle, bone, etc.) that, without Target, make placing
the Interferential “beat” a guessing game. Target eliminates the need
to move the electrodes to achieve the desired result.
In the diagram the electrodes are placed in a position to treat a
point directly in the center of the electrodes. But the center of
interference actually occurs at another point. In these illustrations
the point of interference is shown in a cloverleaf shape as
Interferential treatment aects a cloverleaf-shaped area. Using the
Target pad, the point of interference in easily moved to the desired
treatment area. Other devices increase current at one channel
while decreasing it at the other. is merely rotates the treatment.
e center of interference does not move.
Normal Interferential currents cross at a point between
electrodes. It is dicult to guess where they will cross as
shown in the le diagram. With Target, you move the point
of interference without moving electrodes (as shown in the
diagram on the right)—just press the touch pad.
Why Is Target Better?
With Target, the voltage output from both channels remains equal
at all times; so wherever the treatment is applied, a full, deep
Interferential beat occurs. Other devices attempt to achieve this
eect by increasing the current from one channel while decreasing
the current from the other channel. is method only rotates the
cloverleaf-shaped area, but the center of interference does not
move. In addition, the depth of the beat is reduced.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 30
Other devices increase current at one channel while
decreasing it at the other. is merely rotates the
treatment. e center of interference does not move.
INTERFERENTIAL AND PREMODULATED MODALITY INFORMATION
Target Sweep
e Sweep option literally moves the point of interference inward and outward in a somewhat spiral pattern, bathing about
80 percent of the area within the electrodes with the Interferential current. Sweep utilizes the Target feature and moves the
point of interference to cover a wider treatment area while still retaining the full Interferential beat. Sweep bathes a larger
area with the Interferential current.
Interferential Electrode Placement
When performing Interferential therapy with a two-channel or four-electrode setup, it is
important to arrange the electrodes in a crisscross manner so the current from one channel
will intersect with the current from the second channel at the point where treatment is to be
delivered. Consult published literature for electrode placements for specic sites and conditions.
Interferential Electrode Placement
Interferential / Premodulated Default Settings
e following default settings are set by the manufacturer and are selected when you select IFC or PREMOD. You may
change these defaults to your own preferred settings.
Interferential Default Settings
• High 80-150 Hz
• Target
• e rst available channel pair (1-2 or 3-4)
• Time: 10 minutes
• Frequency Ranges: High 80-150 Hz; Low 0-10 Hz
Premodulated Default Settings
• High 80-150 Hz
• Target
• e rst available channel pair (1 through 4)
• Time: 10 minutes
• Frequency Ranges: High 80-150 Hz; Low 0-10 Hz
• Interferential/Premodulated erapy: 4000 Hz sine wave frequency modulated by a 4000 to 4150 Hz variable
frequency sine wave of equal amplitude
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 31
BIPHASIC / RUSSIAN INSTRUCTIONS
Biphasic / Russian
Instructions
In the Russian and Biphasic Stimulation modes the output of the device is a pulsed sinusoidal wave. 25 Series allows the
operator to choose a muscle contraction/rest cycle that is most suited for the individual patient and for the desired treatment.
Once the cycle is chosen, each muscle-stimulating burst is followed by a rest cycle. See “Russian/Biphasic Parameters” in this
manual for further discussion of pulse rate and duration, and illustrations showing the segments of the Russian Stimulation
cycle and the Biphasic Stimulation cycle.
25 Series provides four treatment options in Russian and Biphasic Stimulation: Normal, Reciprocal, Co-Contraction, and
Custom. Aer deciding which treatment is to be used, attach the appropriate number of leads required to set up the treatment.
NORMAL: Use one channel with one lead wire (two electrodes). Place the electrodes so as to treat through the muscle. e
contraction/rest cycle is selected from an option list of 10/10, 10/30, 10/50, CONT (continuous/no rest cycle), and Custom.
Each time period is indicated in seconds. For example, 10/30 indicates 10 seconds of stimulation with 30 seconds of rest. e
continuous duty cycle is not recommended for electrical muscle stimulation, but may be used for settings that are intended
to eect results other than a muscle contraction.
CO-CONTRACTION: Use two channels and two lead wires (four-electrodes) for this treatment. Each pair of electrodes is
placed over a dierent muscle group. is treatment res the two muscle groups simultaneously—contraction and rest cycles
for both treatment areas occur at the same time. Two channels are required (1-2 or 3-4). Note: 3-4 are available only on the
25 Series 625 and 925.
RECIPROCAL: Use two channels and two lead wires (four electrodes) for this treatment. e reciprocal muscle stimulation
res two muscle groups (such as reciprocal exors/extensors) one aer the other. For example, with a duty cycle of 10/30, the
device would deliver stimulation for 10 seconds to the rst muscle, followed by 10 seconds of stimulation to the reciprocal
muscle. A 30-second rest time follows each stimulation. e timing of the two cycles will overlap (the rst muscle group is
stimulated aer a 30-second rest, even though the second muscle group is 20 seconds into its rest cycle). e Continuous
contraction/rest cycle is not available for Reciprocal treatments. Two channels are required (1-2 or 3-4). Note: 3-4 are available
only on the 25 Series 625 and 925.
CUSTOM CONTRACTION: e Custom Contraction/Rest cycle feature allows the treatment to be customized by selecting
from a Custom Contraction ON time (1 to 60 seconds), and an OFF time (1 to 90 seconds). Treatments can be customized
by using the following steps:
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 32
BIPHASIC / RUSSIAN INSTRUCTIONS
1. Press the CONT/REST toggle key. Select CUSTOM.
2. Press the MODE toggle key. Select CUST C/R (Custom Contraction Rest).
3. Press TREATMENT toggle key. Select Normal, Co-Cont, Recip.
4. Using the RAMP toggle key, select RAMP time (.05, 1.0, 1.5, 2.0).
5. Set CUSTOM CONTRACTION using the arrow keys on the le-side of the Treatment Display Screen (1-60 sec.)
6. Set CUSTOM REST using the arrow keys on the right-side of the Treatment Display Screen (1-90 sec.). e REST
time cannot be less than the CONTRACTION time.
7. Press START.
Biphasic / Russian Quick Setup
1. Choose BIPHASIC or RUSSIAN.
2. Choose the TREATMENT (Normal, Co-contraction, or Reciprocal using the TREATMENT toggle key).
Plug the patient lead(s) into the output jack(s) for the channel(s) selected.
3. Choose the CONTRACTION/REST times by pressing the CONTRACTION/REST toggle key.
4. Choose the RAMP setting by using the RAMP toggle.
5. Change the treatment TIME, by pressing the UP/DOWN TIME ARROW keys, if desired.
6. Change the PULSE and DURATION. Using the MODE toggle key select RATE/DUR (rate/duration).
• Press the PULSE RATE arrow keys to change the PULSE RATE
• Press the PULSE DURATION arrow keys to change the PULSE DURATION
7. Press the MODE toggle key to return to the TIME display window.
8. Raise the INTENSITY to the desired level by pressing the INTENSITY ARROW keys on the right-side of
the Treatment Screen.
9. For co-contraction or reciprocal treatments, set the intensity for the rst channel. Press START. e device
will automatically select the second channel. Set the intensity for the second channel.
10. Press START.
11. STOP. Press the FUNCTION and STOP keys simultaneously to stop only the focus treatment appearing in
the Treatment Screen. Pressing STOP alone, stops all treatments operating on the device. Using the TIME
arrow keys to bring treatment time to zero will also stop a treatment.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 33
BIPHASIC / RUSSIAN INSTRUCTIONS
Detailed Biphasic / Russian Setup
If you do not understand the terms contraction, rest, ramp time, pulse duration, or pulse rate; consult the diagrams in the
section of this manual entitled “Biphasic / Russian Parameters.”
1. Press the BIPHASIC or RUSSIAN
When you select this modality, the default settings are automatically selected. If you wish to use the default settings,
you can now increase intensity to the desired level and press START.
Default Setting
Mode............................................... Normal
Cont/Rest Time ................................. 10/30
Time ..........................................10 minutes
Ramp Time .................................... 0.5 sec.
If you wish to change the treatment settings, proceed through the following steps:
2. Choose the TREATMENT.
Use the TREATMENT toggle key to select NORMAL, CO-CONT (Co-contraction), or RECIP (Reciprocal). Connect
the patient lead wire(s) to the channel(s) selected.
3. CONTRACTION/REST
Cycle Times Using the CONT/REST toggle key, choose the CONTRACTION/REST cycle times. Available options
include 10/10, 10/30, 10/50, Continuous, and Custom. e 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. e Continuous duty cycle is not recommended for electrical muscle stimulation, but may be used for
settings that are intended to eect results other than a muscle contraction.
4. Choose the RAMP Setting (does not aect Continuous treatments).
Press the RAMP TOGGLE key one or more times to select the desired ramp time. Available options include .5, 1.0,
1.5, and 2.0 seconds. e ramp time is applied to both the start and to the end of the contraction time. e ramp time
is in addition to the contraction time itself.
5. Change the treatment TIME (optional).
e default time is displayed. Use the TIME arrow keys to increase or decrease the treatment time.
6. Change the PULSE DURATION and/or PULSE RATE (optional)
Press the MODE toggle key to select RATE/DUR (Pulse Duration). e pulse DURATION (width) and RATE may
be modied for each channel pair (1-2 and 3-4).
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 34
BIPHASIC / RUSSIAN INSTRUCTIONS
Press the PULSE RATE arrow keys to the le-side of the Treatment Screen to change the PULSE RATE. Press the
PULSE DURATION arrow keys to the right-side of the Treatment Screen to change the PULSE DURATION. Press
the MODE toggle key and select TIME to return the TIME display. However, if you make no key presses for 10
seconds, the display automatically returns to the TIME display. e ranges and default settings for pulse duration
(width) and pulse rate are listed later in this section.
7. Raise the INTENSITY to the desired level.
Set the intensity by pressing the INTENSITY arrow keys located on the right-side of the Treatment Display Screen.
Increasing the intensity sends current directly to the patient. Intensity can be decreased by pressing the down arrow key,
Before selecting the intensity setting for an individual patient, see section entitled “Electrotherapy Usage Cautions”
for recommended intensity settings. Also see the section of this manual entitled “Contraindications, Warnings, and
Precautions” for specic precautions when treating any conditions contributing to loss of sensation, or any time the
patient cannot feel the electrical stimulation.
e intensity, pulse rate, and pulse duration must all be considered together when setting up the treatment as all
three factors aect patient comfort. It may be necessary to adjust one or more of these parameters somewhat aer
the initial settings are selected to nd the best settings for a given treatment and patient.
8. For co-contraction or reciprocal treatments, select the SECOND CHANNEL and set the INTENSITY.
Intensity is set for each channel separately. For co-contraction or reciprocal treatments, Set the intensity for the
rst channel. Press START. e device will automatically select the second channel. Set the intensity for the second
channel. When setting intensity, only the channel with the solid GREEN light is aected. e rst channel will be
illuminated in YELLOW.
9. Press START
When you press START the treatment timer begins counting down. If the intensity is not set before pressing START,
the treatment will not begin until the intensity is set. For Reciprocal and Co-contraction treatments, the intensity
must be set for each channel separately.
10. SAVE DEFAULTS
If this treatment setup is the most common Biphasic or Russian treatment setup you use, save the treatment
parameters as your defaults. Aer setting up the treatment, press and hold the START key until a tone sounds
indicating the treatment parameters have been saved. e next time you select this modality, the saved parameters
will be selected automatically.
11. MODIFY Settings
While the treatment is in progress, the treatment settings can be modied. Carefully observe the channel indicator
lights when modifying a treatment. When a channel’s light is illuminated GREEN, the current treatment parameters
for that channel are displayed. Any changes made to the parameters will aect only the channel that is illuminated in
GREEN. Use the toggle key to display the parameters of another channel in order to modify parameters.
During a Biphasic or Russian treatment you may make the following modications:
• CONTRACTION/REST cycle.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 35
BIPHASIC / RUSSIAN INSTRUCTIONS
• RAMP TIME
• TREATMENT TIME
• RATE/DURATION (not available for Reciprocal treatments nor when two “Normal” treatments are running
simultaneously on a channel pair—CH 1-2 or 3-4).
• INTENSITY (separately for each channel)
12. STOP
When the treatment time has elapsed, the current to the patient stops and a tone sounds signaling the end of a
treatment. Treatments in progress may be stopped at any time using one of the following methods.
Stop One Treatment Only. Press and hold the FUNCTION key and press STOP. is stops only the treatment in focus.
Stop All. Press the STOP key. All treatments at all channels will stop.
Stop Time. Reduce the treatment time using the Time arrow key. e output at the selected channel is stopped,
and the device then displays the parameters for the next treatment that remains in progress (if there is an
active treatment).
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 36
BIPHASIC / RUSSIAN MODALITY INFORMATION
Biphasic / Russian
Modality Information
Russian Stimulation
With Russian Stimulation mode, the output of the device is a 2500 Hz sinusoidal wave. Russian stimulation currents produce
strong muscle contractions.
e Dynatron 25 Series devices allows complete control over all the parameters of the Russian Stimulation treatment. ree
treatment modes include Normal for ring one muscle, Reciprocal for ring two dierent muscles at dierent times, and
Co-contraction for ring two dierent muscles simultaneously. Choose a muscle contraction/relaxation cycle from options
of 10/10 (ten seconds on and ten seconds o), 10/30, 10/50, Continuous, and Custom cycles. e Normal mode requires use
of just one output jack (Channel 1, 2, 3, or 4). e Reciprocal and Co-Contraction modes utilize a channel pair (Channels
1-2 or 3-4).
NOTE: e continuous duty cycle is not recommended for electrical muscle stimulation, but may be used for settings that
are intended to aect other results than a muscle contraction. Pulse rate, the pulse duration, and the ramp time can all be
modied from their default settings.
Biphasic Stimulation
e Biphasic stimulation is similar to Russian stimulation in the parameters that are selected and in the available options.
It diers from Russian stimulation in the pulse duration and rate ranges (see parameters below). Additionally, the Biphasic
pulse includes just one cycle (one positive phase and one negative phase) per pulse.
Biphasic / Russian Parameters and Defaults
e default settings and the available ranges for Biphasic and Russian are as follows:
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 37
BIPHASIC / RUSSIAN MODALITY INFORMATION
Biphasic / Russian Default Settings
Mode Normal
Contraction / Rest Times 10 / 30
Treatment Time 10 Minutes
Ramp Up and Down Time 5 sec.
Russian Stimulation Contraction Rest Times
Default Setting Valid Range
Pulse Rate
Pulse Duration
50 to 400 µs pulse duration @ 1-200 Hz (50% levels)
50 Pulses per sec. 1 - 500
200 µSec 50 to 400 µSec
Default Setting Valid Range
Pulse Rate
Pulse Duration
2500 Hz sine wave amplitude modulated at 50 Hz.
e pulse rate and duration should not be confused with the contraction/rest times in the treatment as these are dierent
parameters; the pulse occurs only during the contraction time. e diagrams below illustrate the relationship of each of these
parameters.
e pulse duration 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). A 50 percent duty cycle means that the length of the pulse duration must be equal to or less than
the zero-current period. e number of pulses per second aects the allowable range of pulse durations. A greater number of
pulses per second means a shorter pulse duration is allowed. e Dynatron 25 Series will not allow you to circumvent this rule.
50 Pulses per sec. 1-500
10 mSec .04 to 50 mSec
Russian Stimulation
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 38
BIPHASIC / RUSSIAN MODALITY INFORMATION
If a given Russian stimulation treatment has a 50 percent duty cycle, this means the output cycle is continuously repeating
for half of the pulse duration (see “Rate” in the diagram above) followed by a zero-current period for the other half of the
pulse duration.
Biphasic stimulation diers from Russian stimulation in the pulse duration (width) and rate ranges, as explained above. In
addition, the Biphasic pulse includes just ONE output cycle per pulse. One pulse cycle (including one positive phase and
one negative phase) occurs, followed by a zero-current period.
Biphasic Stimulation
e pulse rate and duration (width) may be modied during setup of a Russian or Biphasic Stimulation treatment or may be
modied while a treatment is in progress.
When modifying the pulse rate and duration (width) for a treatment in progress, modify the intensity as well, as all
three of these parameters will aect delivered energy and patient comfort.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 39
HIGH VOLT INSTRUCTIONS
High Volt
Instructions
High Volt electrical stimulation is a pulsed DC current with pulse durations in the microsecond range and pulse rates
ranging from 1 to 200 Hz, with peak amplitude of up to 500 Volts. e Dynatron 125 devices deliver High Volt utilizing a
twin-peak monophasic waveform.
High Volt treatments are delivered using electrodes. e device provides a dedicated channel for High Volt electrodes
treatment (HV). During High Volt treatments, the Dynatron 125 device’s other output channels (1-2-3-4) remain available
for other simultaneously stim treatments.
High Volt Electrode Setup
is treatment setup utilizes a standard lead wire with
two electrodes; an active and a dispersive electrode.
e size of the dispersive electrode is recommended
to be double the area of the active electrode. If desired,
the active output of the lead wire may be bifurcated by
using an optional bifurcated extension (Part no. 7B0077)
to attach additional active electrodes. However, the
combined total area of the active electrodes should be no
more than half the area of the single dispersive (passive)
electrode, as illustrated.
It is best to use a lead that is marked to show polarity. e
active electrode is connected to the positive output. e
dispersive electrode is connected to the output end that
is marked “HV Dispersive” (-). If desired, a bifurcated
lead extension may be attached to the positive (HV
Active) end of the lead wire, allowing two active
electrodes to be used. In this case, be sure the dispersive
High Volt Electrode Setup
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 40
HIGH VOLT INSTRUCTIONS
electrode is at least twice the size (in area) of the combined sizes of the active electrodes. e bifurcated lead wire extension
is an optional accessory available through Dynatronics.
During the treatment current ows in one
direction between the active and dispersive
electrodes. Changing the polarity in the
treatment parameters has the eect of
reversing the direction of the current ow
between electrodes. It is important to attach
the active electrode to the HV Active (+)
output of the lead wire to ensure you are
delivering the selected polarity. e Lead
wires are labeled: HV Active (+), HV
Dispersive (-) delivery.
Detailed High Volt Setup
High Volt Quick Setup
1. Press HI VOLT.
• Plug in lead wire to the HIGH VOLT OUTPUT JACK (HV).
• Attach electrodes to patient.
2. Choose the POLARITY. Polarity must be selected before customizing a treatment.
3. TIME. Select TIME by using the TIME ARROW keys for Electrode Pads treatments only.
4. Select (or setup) a PULSE RATE RANGE (High/Low) or set a single pulse rate by pressing the MODE toggle
key and selecting RATES. Use the arrow keys next to RATE-START and RATE-STOP to set the Pulse Rate
Range.
5. Set CONTRACTION/REST times by pressing the FUNC (Function key). Use the CONT/REST toggle key
to make your selection.
High Volt electrodes with bifurcated active lead.
6. RAMP TIME. While in FUNCTION mode use the RAMP TOGGLE key to select RAMP TIME.
7. Raise the INTENSITY to the desired level.
8. Press STA RT . Treatment time will begin to count-down for an Electrodes treatment.
9. S T O P. Press and hold the FUNCTION key and press the STOP key to stop only the focus treatment
appearing in the Treatment Screen. Pressing STOP alone, stops all treatments operating on the device.
Using the TIME arrow keys to bring treatment time to zero will also stop a treatment.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 41
HIGH VOLT INSTRUCTIONS
1. Press the HI VOLT key.
e High Volt channel and the default settings for High Voltage electrode pulsed stimulation are automatically
selected. Using the dedicated High Volt (HV) channel attach leads and place electrodes on the patient now. .
Default Setting
Treatment ........High Volt Pads Treatment
Duty Cycle .............................. Continuous
Time Electrodes .......................10 minutes
Polarity .......................................... Negative
Pulse Rate................................ High Range
Range: ............................... High 80-120 Hz
If you wish to use the default settings, increase the intensity to the desired level, and press START. To customize the
settings, follow steps 2-8.
ELECTRODE PADS TREATMENTS are timed, and a treatment time in MINUTES is entered at the start of the
treatment. e timer counts DOWN for electrode treatments.
2. Choose the POLARITY
Press the Polarity toggle key to choose Polarity. Polarity options are Negative, Positive, and Bipolar.
3. Change the treatment TIME, if desired.
Use the TIME UP/DOWN ARROW keys to change the TIME for an Electrode treatment. Using the MODE toggle
key, be sure TIME is illuminated in the MODE window when entering TIME.
4. PULSE RATE RANGE.
Select a PULSE RATE RANGE (High 80-120 Hz or Low 1-10 Hz) or set a single pulse rate by pressing the MODE
toggle key and selecting RATES from 1-120 Hz. Use the arrow keys next to RATE-START and RATE-STOP to set
the Pulse Rate Range. ese ranges may be changed for a single treatment if desired, or press and hold the START
key to set new default settings to be applied to all future treatment setups. e PULSE RATE RANGE must be set
before pressing START.
5. CONTRACTION (ON) and REST (OFF) TIMES
FUNCTION KEY: To access CONTRACTION and REST settings, press the FUNCTION key.
Press the CONT/REST toggle key one or more times to select contraction/rest (Duty) cycle times. Available options
include 10/10, 10/30, 10/50, CONT (Continuous). and Custom. e setting of 10/30, for example, means a 10-second
contraction time followed by a 30-second rest time.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 42
HIGH VOLT INSTRUCTIONS
CUSTOM (Duty) CYCLE TIME SELECTIONS
• Press the FUNCTION key located on right-side of the device faceplate.
• Using the CONT/REST toggle key, select CUSTOM in the CONT/REST window.
• Using the MODE toggle key, select CUST CR in the MODE window. Selections will be illuminated GREEN.
• Custom Contraction and Custom Rest cycle times may now be set by using the Up and Down arrow keys
located next to Custom Contraction and Custom Rest windows. Available ranges for Contraction (ON) times
are 1-120 seconds, for the REST (OFF) times 1 to 300 seconds. Remember, the REST time cannot be less than the
Contraction time. Pressing and holding the START key until the beep is heard will save the current Contraction/
Rest settings as the default.
6. Choose the RAMP setting.
FUNCTION KEY: To access the RAMP settings, press the FUNCTION key.
Press the FUNCTION key on the right side of the face plate. Press the RAMP toggle key to select RAMP time.
Selections include: 0.5, 1.0, 1.5, and 2.0. Ramp time is applied to both the start and end of the contraction. Ramp
time is in addition to the contraction time itself. A ramp setting is not applied to the Continuous duty cycle except
when using a probe. With a probe treatment set to a Continuous duty cycle, a ramp time of 3 seconds is automatically
applied.
7. INTENSITY.
Using the Up and Down arrow keys to the right-side of the INTENSITY display, set the Intensity. Remember, when
you increase intensity, current to the patient begins. erefore, START should be pressed immediately aer setting
the intensity to begin the treatment timer.
NOTE: Never use High Volt to treat any conditions which contribute to loss of sensation, or an area where the
patient cannot feel the electrical stimulation.
8. Press STA RT .
Press START. When you press start, the treatment timer begins counting down.
NOTE: SAVING DEFAULTS. If the treatment you have just set up is the most common High Volt setup you use,
the treatment parameters can be saved as the defaults for your own device. Aer setting up the treatment, press
and hold the START key for two seconds. At the end of two seconds, a beep will sound indicating the treatment
parameters have been saved. e next time this modality is chosen, the parameters will be selected automatically.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 43
HIGH VOLT INSTRUCTIONS
9. MODIFY Settings
While the High Volt treatment is in progress, TIME, INTENSITY, AND POLARITY can be modied. Carefully
observe the channel indicator lights when modifying a treatment. When a channel’s light is illuminated GREEN, the
current treatment parameters for that channel are displayed. Any changes made to the parameters will aect only the
channel that is illuminated in GREEN. Use the Channels Toggle key to display the parameters of another channel in
order to modify parameters.
10. STOP
When the treatment time has elapsed, the current to the patient stops and a tone sounds signaling the end of a
treatment. Treatments in progress may be stopped at any time using one of the following methods.
Stop One Treatment Only. Press and hold the FUNCTION key and press STOP. is stops only the treatment in
focus.
Stop All. Press the STOP key. All treatments at all channels will stop.
Stop Time. Reduce the treatment time using the Time arrow key. e output at the selected channel is stopped,
and the device then displays the parameters for the next treatment that remains in progress (if there is an active
treatment).
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 44
HIGH VOLT MODALITY INFORMATION
High Volt
Modality Information
High Voltage pulsed stimulation is a pulsed DC current with
pulse durations 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.
e Dynatron 25 Series High Volt treatment setup uses a dedicated
channel. Each treatment utilizes the single HV channel with one or
more active electrodes and a large dispersive electrode. Electrodes
are placed on opposite sides of the aected area so treatment is
“through” the aected area.
High Volt Waveform
High Volt Waveform for positive polarity
e High Volt waveform is a twin-peak monophasic decaying
waveform with either positive or negative polarity.
High Volt Settings
High and Low Sweep Pulse Rate. e user may select High (80-120 Hz) or Low (1-10 Hz) frequency ranges. During a
treatment, the device scans through the range of frequencies selected. e settings for these pulse rate frequency ranges may
be customized and saved by the user. e available custom range is 1 to 200 Hz.
Continuous Pulse Rate. e pulse rate may be set to a single continuous pulse rate instead of a range. e pulse rate is
selected from a range of 1 to 200 Hz.
Selectable Polarity. Positive or Negative monophasic current may be selected. Alternating positive and negative (Bipolar)
currents may also be selected. Note: Dual Polarity is not available with a probe treatment.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 45
HIGH VOLT MODALITY INFORMATION
Custom Contraction/Rest Time Cycles. e Dynatron 25 Series allows for the choice of muscle contraction and relaxation
time cycles (Duty Cycles) from options of 10/10 (ten seconds on and ten seconds o), 10/30, 10/50, Continuous or Custom
cycles. e Custom time cycle allows for a Contraction (ON) time from 1 to 120 seconds, and a Rest (OFF) time from 1 to
300 seconds. Remember, the Rest time cannot be less than the Contraction time.
Selectable Ramp Speed. You can choose a ramp speed of .5 (1/2) to 2.0 seconds in half-second increments. For patient
comfort, the ramp occurs both before and aer the “Contraction” segment of the pulse.
Pulse Duration. e pulse duration is xed at 25 µs (micro-seconds).
Pulse Pair Interval. e interval between the two pulses in the wave form is xed at 100 µs.
Intensity Display in Volts. Intensity is displayed in volts (peak voltage with no load) with a range of 1 to 500 volts.
High Volt Default Settings
e following default settings are set by the manufacturer and are selected when you choose High Volt. You may change
these defaults to your own preferred settings. See “Setting Defaults” in this manual.
• High Volt Pads Treatment
• Continuous Duty Cycle
• Treatment Time Electrodes: 10 minutes
• Polarity: Negative
• Pulse Rate: High Range
Default High Range: ...........................................................................80-120 Hz
Default Low Range: ..................................................................................1-10 H
Available Range:....................................................................................1-200 Hz
High Volt Waveform Specications
Waveform: ...................................................................Twin peak, monophasic
Pulse Duration: ............................................................................................25 µs
Pulse Rate Range: .............................................................................1 to 200 Hz
Pulse Interval: ............................................................................................100 µs
Maximum Power Output: .................. Limited to less than 500 V, open load
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 46
ULTRASOUND INSTRUCTIONS
Ultrasound
Instructions
e following Ultrasound Instructions are for 25 Series 825 and 925 USERS ONLY. e Dynatron 25 Series 525 and 625 do not
oer the Ultrasound feature.
Ultrasound therapy channels sound waves through muscle, nerve, bone, and connective tissue to aid in reducing pain,
muscle spasms, and joint contractures.
e physiological eect of Ultrasound therapy depends upon the frequency of the Ultrasound signal. e lower frequency
(1 MHz) penetrates deeper than a higher frequency (such as 2 MHz or 3 MHz), thus the practitioner can decide which
frequency to use according to the condition and depth to be treated.
A section in this manual entitled “Ultrasound Usage Cautions” provides some general guidelines for Ultrasound treatment
and selection of the appropriate soundhead to help ensure safe and eective treatments are delivered to your patients. Further
information about Ultrasound application may be obtained from published medical literature.
WARNING
• ALWAYS keep the applicator soundhead in constant motion.
• ALWAYS keep the soundhead properly coupled to the patient’s skin or submerged underwater when intensity
is turned on.
• Use ample conductive gel to ensure good coupling throughout the treatment. If needed, apply additional gel
during the treatment.
• See the section of this manual entitled “Contraindications, Warnings, and Precautions” for Ultrasound treatments.
• Be alert for any sign of periosteal (bone) pain.
• Be sure to read all instructions for operation before treating a patient.
• Use of controls or adjustments or performance of procedures other than those specied herein may result in
hazardous exposure to ultrasonic energy.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 47
ULTRASOUND INSTRUCTIONS
Make sure a soundhead is rmly plugged into the device before turning the device on. When changing to a dierent size
soundhead, turn the machine o rst, remove the soundhead, plug in the desired soundhead, then turn the machine on
again. Please acquaint yourself with the following terms and device features prior to delivering an Ultrasound treatment.
Soundhead Warming
Soundhead Warming is an optional feature used to maintain a comfortable soundhead temperature for the patient. When
Soundhead Warming is ON, the soundhead should remain in its holder as a small amount of Ultrasound output is emitted
from the soundhead (0.1 W/cm2). e soundhead warming mode is automatically stopped during a treatment, and resumes
automatically as needed aer a treatment has ended.
If Soundhead Warming is ON and SOUND has been selected but is not the focus treatment, the word SOUND in the
CHANNELS window will be illuminated ORANGE.
Although the Soundhead Warming feature defaults to OFF, it can be turned ON at any time. To turn ON the feature, select
SOUND, followed by FUNCTION key. Using the WARMING toggle key, select ON.
CAUTION
• Do not drop the soundhead on the hard surfaces.
• Do not cool the soundhead with ice water or ice packs.
• Do not allow the soundhead to overheat repeatedly.
• Do not hold the soundhead in the air while a treatment is running.
All of these conditions are likely to damage the soundhead crystal and/or to stress electronic components in the
device. Damage caused by these conditions is not covered by warranty.
Coupling
e term “coupling” refers to the ability to deliver ultrasonic waves from the soundhead to the skin surface with as little
impedance or dissipation of power as possible. Coupling (contact between the soundhead and the treatment site) may be
provided by a coupling agent such as a gel or lotion. Any material used as a coupling agent must be highly conductive of
ultrasonic waves. Air is a very poor conductor of ultrasonic waves. Holding the soundhead in the air while a treatment is
running may also damage the soundhead crystal and/or stress electronic components in the device.
If any part of the soundhead is exposed to air during the treatment, coupling is decreased. e air bubbles in a whirlpool, for
example, can decrease the eective Ultrasound therapy to the patient. Avoid allowing any air between the soundhead and
the treatment area. Water is an excellent conductor of ultrasonic waves; therefore, underwater treatments provide excellent
coupling.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 48
ULTRASOUND INSTRUCTIONS
During any Ultrasound treatment the soundhead should be moved continuously, covering an area approximately two to four
times the size of the soundhead. e full surface of the soundhead should maintain in contact with the patient’s skin (except
with underwater treatments).
Head Temperature Hot Display
If coupling (the eective degree to which the Ultrasound energy is delivered from the soundhead to the patient’s body) is not
adequate during treatment, the temperature of the soundhead rises and the patient does not receive the full intended dosage.
e Dynatron 25 Series TEMPERATURE bar reects the amount of soundhead heating caused by poor coupling to ensure
that the patient is receiving the optimal treatment and that the soundhead crystal is protected from overheating.
When the coupling is acceptable, the length of the Blue/Green segment lights on the coupling bar will remain less than half
the length of the bar or less. If the soundhead approaches a temperature of 103 degrees Fahrenheit, the TEMPERATURE
BAR begins to increase in length and the colored bar moves past the center mark and continues to lengthen.
If the SOUNDHEAD reaches approximately 103 degrees, a caution will appear in the Treatment Display Screen: “CAUTION,
SOUNDHEAD IS GETTING HOT.” Following the caution, the treatment should be terminated and the soundhead cooled.
If the SOUNDHEAD reaches approximately 108 degrees, SOUND will be disabled and the Treatment Display Screen will
read: “SOUNDHEAD IS TOO HOT! OUTPUT HAS BEEN DISABLED TO ALLOW COOLING.”
NOTE: If the soundhead becomes too hot the SOUNDHEAD HOT warning will appear in the Treatment Screen whether
SOUND is the focus treatment or not.
e soundhead must then be cooled down before the treatment can resume. When the soundhead cools suciently, press
PAUSE or START to resume the treatment. e output power resumes, the display returns to its normal state, and the timer
resumes. e soundhead should cool quickly if placed in the soundhead holder or if held exposed to the air. Larger soundheads
take longer to cool than smaller heads. If the soundhead is not cooling as quickly as needed to resume the treatment, it can
be placed in room temperature water to quicken the cooling process. Sometimes just applying more conductive gel will
adequately cool the head.
NEVER USE ICE OR ICE PACKS TO COOL THE SOUNDHEADS as this is likely to cause thermal shock to the electronic
components of the soundhead and may necessitate a costly repair. Heads damaged by thermal shock are not covered by the
warranty.
To prevent overheating of the soundhead, maintain good coupling throughout the treatment by applying ample conductive
gel or lotion. Reducing the power when treating an area where it is dicult to obtain good coupling will also keep the
soundhead from overheating.
Display Watts or W/cm
2
Power for the Dynatron 25 Series may be displayed as WATTS or W/cm2. To choose the desired option, select SOUND, then
press the DISPLAY toggle key under the DISPLAY window and select WATTS or W/cm2. e default setting for power is W/
cm2; however, the display you prefer may be selected at any time before or during a treatment. Power selection may be saved
by pressing and holding down the START key until a beep sounds.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 49
ULTRASOUND INSTRUCTIONS
Ultrasound Quick Setup
Select SOUND.
1. FREQUENCY. Using the FREQUENCY toggle key select 1 MHz, 2 MHz, or 3 MHz.
2. DUTY CYCLE. Using the DUTY toggle key, select 10%, 20%, 50% or CONT (Continuous).
3. TIME. Change the treatment TIME, if desired using the Up/Down arrow keys.
4. INTENSITY. Using the Up/Down arrow keys, raise the INTENSITY to desired level.
5. Press STA RT .
6. S T O P. Press and hold the FUNCTION and press the STOP key to stop only the focus treatment appearing
in the Treatment Display Screen. Pressing STOP alone, stops all treatments operating on the device. Using
the TIME arrow keys to bring treatment time to zero will also stop a treatment.
Detailed Ultrasound Setup
1. Press SOUND.
Press SOUND to select an Ultrasound treatment. e Default Parameters automatically appear in the Treatment
Display Screen. Following are the Ultrasound Default Parameters:
Frequency ........................................1 MHz
Duty ......................................... Continuous
Display ..............................................W/cm
Time...................................................5 min.
Press the FUNCTION key to view the following:
Parameter ...................................Frequency
Warming .............................................. OFF
If you wish to use the default settings, increase the Intensity to desired treatment level and press START. If you wish
to customize settings, follow steps outlined below.
2
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 50
ULTRASOUND INSTRUCTIONS
2. Choose the FREQUENCY.
Press the FREQUENCY toggle key located under the FREQUENCY window to select 1, 2, or 3 MHz. Any one of the
three Frequencies may be selected with the 2 cm2, 5 cm2 or 10 cm2 soundhead.
3. Select the DUTY CYCLE.
Press the DUTY CYCLE toggle key to select one of the four available options: 10%, 20%, 50%, or Continuous duty cycles.
4. Press the FUNCTION key located on the console to display additional parameters.
5. HEAD WARMING.
Press the FUNCTION key to access the Head Warming option. Using the WARMING Toggle key the Head Warming
feature may be turned ON or OFF.
6. TIME.
e default time is set for a 5 minute treatment. Time can be changed by using the TIME Up/Down arrow keys
located to the le of the TIME display.
7. Raise the INTENSITY.
Use the INTENSITY Up/Down arrow keys to increase the power to the desired setting. For patient safety and
comfort, it is recommended that treatment begins with .1 w/cm2, then increase power to the desired level aer the
treatment begins. Valid ranges are from 0.1 to 2.0 w/cm2 (exceptions: valid ranges when using a 10 cm2 head at 3
MHz are from 0.1 to 1.0 w/cm2).
8. Press STA RT .
Press START, the treatment timer begins counting down and output is delivered to the soundhead. If you fail to
set the Intensity before pressing START, a reminder will appear in the lower-right corner of the Treatment Display
Screen: “CANNOT START TREATMENT WITH ZERO INTENSITY.”
9. SAVING DEFAULTS. If the treatment you have just set up is the most common Ultrasound setup you use, new
defaults may be saved by pressing and holding down the START key for two seconds. At the end of two seconds,
a beep will sound indicating the treatment parameters have been saved. e next time SOUND is selected, these
parameters will be selected automatically.
10. MODIFY a treatment in progress, if desired.
While the treatment is in progress, the following parameters can be modied: FREQUENCY, DUTY CYCLE, TIME,
INTENSITY, and DISPLAY of Watts or Wcm2.
11. PAUSE. Temporarily PAUSE a treatment, if necessary, while the treatment is in progress.
To temporarily PAUSE an Ultrasound treatment, press the PAUSE key. Two quick tones will sound indicating that
the treatment has been paused. e Ultrasound output from the soundhead stops and the treatment timer is paused
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 51
ULTRASOUND INSTRUCTIONS
without ending the treatment. Press the PAUSE key again to restart the treatment. A tone will sound indicating that
the treatment is again in progress. Output resumes and the treatment timer starts from where it was paused.
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.
12. S T O P.
When the treatment time has elapsed, the current to the patient stops and a tone sounds signaling the end of a
treatment. Treatments in progress may be stopped at any time using one of the following methods.
Stop One Treatment Only. Press and hold the FUNCTION key and press STOP. is stops only the treatment in focus.
Stop All. Press the STOP key. All treatments at all channels will stop.
Stop Time. Reduce the treatment time using the Time arrow key. e output at the selected channel is stopped,
and the device then displays the parameters for the next treatment that remains in progress (if there is an active
treatment).
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 52
ULTRASOUND MODALITY INFORMATION
Ultrasound
Modality Information
For Dynatron 825, and 925 users only. e Dynatron 525 and 625 do not oer the Ultrasound feature.
Ultrasound, by its very nature, has the ability to irritate the patient’s skin. While the benets of Ultrasound far outweigh any
disadvantages, certain precautions should be observed to assure maximum safety and comfort for your patients.
A patient’s tendency to have adverse reactions to Ultrasound is dependent upon several factors. Some of these factors are
discussed below.
Selecting the Appropriate Soundhead
Head and Crystal Size Comparison
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 53
ULTRASOUND MODALITY INFORMATION
e selection of the appropriate soundhead is key to the success of the treatment and is based on the size of the area to be
treated. Ultrasound treatments should be kept specic to the tissue involved in pathology. A good guideline is 2 to 4 times
the size of the soundhead. For example:
• A 2 cm2 soundhead can deliver up to 4 Watts and is appropriate for small areas (i.e. hands, ngers, feet).
• A 5 cm2 soundhead can deliver up to 10 Watts and is appropriate for medium sized areas (i.e. extremities such as
arms, legs, and cervical areas).
• A 10 cm2 soundhead can deliver up to 20 Watts and is appropriate for large areas (i.e. torso and back).
Ultrasound is a directed beam of energy. erefore, not only will the average spatial intensity be a factor in the dosage the
patient receives, but the time delivered and area covered will matter as well. For example, an area of 50 cm2 is treated for 5
minutes. en an area of 200 cm2 is treated for 5 minutes. Both receive the same intensity. e 200 cm2 area however does
not receive the same dosage (only ¼ ) because as the soundhead is moved around the area it has to cover represents 4 times
as much tissue.
e Soundhead area measurement is the ERA (eective radiating area). Each soundhead has an eective radiating area. It is
not necessarily the outside diameter of the soundhead, but the area of the crystal inside, therefore special care should be
taken in selecting the correct size soundhead for the area to be treated according to the diameter of the crystal.
NOTE: If a patient experiences pain during a treatment, the size of the soundhead maybe inappropriate for the area
being treated, the intensity maybe too high, the treatment time maybe too long, or coupling maybe poor.
Penetration of Ultrasound Waves
e correct frequency should be selected for the depth of penetration desired. e amount of penetration needed is
determined by the density of tissue and the depth of the site to be treated. Care should be taken to select a penetration level
that does not cause periosteal (bone) pain.
e frequency determines the depth of penetration of
the Ultrasonic wave.
• Select 1 MHz for deep lesions; provides a
Half-Value Distance (HVD) of about 5cm.
• Select 2 MHz for moderate depth lesions; about
2.6cm HVD.
• Select 3 MHz for supercial lesions; about
1.5cm HVD.
HVD is the approximate point at which the Ultrasound
energy is reduced to half in the average human tissue.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 54
Multi-Frequency Ultrasound
ULTRASOUND MODALITY INFORMATION
Types of Delivery
Ultrasound can be delivered in four dierent ways. You will likely only see two of the four methods in clinical practice.
1. Direct Contact Movable. Here the soundhead is placed in direct contact with the patient. A coupling agent is used
between soundhead and the patient’s skin. e soundhead is moved slowly, but continuously. is is the method of
choice.
e rate of speed at which the applicator moves across the skin is very important in determining how much Ultrasonic
output is delivered. If the rate is too slow, the patient may feel periosteal pain (bone ache/pain). If the rate is too fast,
or if the applicator head becomes uncoupled with the skin, the amount of treatment is reduced. Uncoupling can also
cause the soundhead to overheat.
2. Immersion Method. Here the area to be treated is placed underwater. e soundhead is water tight so it can be
immersed with the area to be treated. e water becomes the coupling agent. e head is always moving around the
surface area, but not in contact (1/2 to 1 inch away).
3. Hydrogel Disk. For treating crater wounds, cover the wound with a hydrogel disk and apply the soundhead to the
disk. is allows direct wound sonation without bringing the soundhead in direct contact with the wound.
4. Stationary Soundhead. is method is dangerous. Hot spots can develop. Do not use.
Treatment Time
For Sub-Acute Conditions:
For Chronic Conditions:
For Maximal ermal Eect:
area to be treated (cm2)
= minutes of treatment
1.5 x ERA
area to be treated (cm2)
= minutes of treatment
1.0 x ERA
area to be treated (cm2)
= minutes of treatment
.8 x ERA
Treatment Intensity
Several factors come into play as one decides the level of intensity for the treatment.
1. Supercial lesions require less intensity.
2. Less intensity should be used if bone is supercial to the treatment eld.
3. Less intensity should be used when the stage of the injury makes heating questionable.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 55
ULTRASOUND MODALITY INFORMATION
4. Use a little lower intensity for the rst treatment to gauge response.
5. Patient feedback is key. A treatment should feel warm, but the patient should never feel heat, pain, stabbing, pricking
or dull ache.
Acute Conditions: ........................................ 0.1 – 0.5 W/cm2 (no appreciable thermal eect).
Sub-Acute Conditions: ........................... 0.5 – 1.0 W/cm2 (Mild to Moderate thermal eect).
Chronic Conditions: ............................1.0 – 2.0 W/cm2 (Moderate to Strong thermal eect).
NOTE: It is very common that intensity is always 1.5 W/cm2. is is incorrect in many cases. A more specic
intensity should be used based on patient response and stage of injury.
Frequency of Treatment
Treatment can be given daily. It is not uncommon to give Ultrasound twice daily, but this may be excessive. Some guidelines
may be helpful.
1. Daily may be the best maximum frequency.
2. Ultrasound can be eectively given every other day.
3. Ultrasound should give some positive benets by the 3rd or 4th application. If not, discontinue the treatment and
consider other options.
4. A maximum of 12 to 15 Ultrasound treatments should be given. If the result desired has not been reached by this
point, Ultrasound may not be the proper choice. EXCEPTION: Some Chronic conditions which cause adhesions.
Usage Cautions – Combination Treatments
When using a Stim device in conjunction with a 25 Series device to output Stim through the soundhead, observe all contraindication, warnings, precautions, and usage cautions provided by the manufacturer for all modalities involved.
Potential for Burns or Periosteal Pain
Some patients’ skin is more sensitive to Ultrasound output. is can cause a reaction similar to a heat rash. It is also possible
for a patient to suer a burn from Ultrasound therapy if the therapy is not administered properly. is can occur for the
following reasons:
• Intensity (power) too high
• Frequency too low
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 56
ULTRASOUND MODALITY INFORMATION
• Holding the soundhead in one place on the patient’s skin
• Moving the soundhead too slowly
• Treating an area where sensory nerve damage is present with a loss of normal skin sensation
• Time (Caution: Don’t treat too long).
Bony prominences are especially susceptible, as they reect sound waves and increase intensity to the periosteum resulting
in a burning sensation. Desensitized areas can be overheated or burned without the patient realizing it, so extreme care must
be taken with these patients (e.g. diabetes, neural damage, etc.)
Burns can be avoided as long as the treatment causes no pain, tingling, excess heat or aching (for patients with normal skin
sensation). Use sucient coupling agent and make sure there are no bubbles in the gel. When treating in water, clear the
bubbles o the soundhead and o the patient’s skin.
An un-calibrated soundhead can also cause tingling, excess heat, aching, or a burning sensation.
Read Ultrasound Contraindication, Warning, & Precaution in this manual for more information.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 57
ULTRASOUND PROBLEM SOLVING
Ultrasound
Problem Solving
Whirlpool Treatments
If you are treating in a whirlpool, you may nd the temperature reaches high enough to read approximately 103˚F, causing
the overheated soundhead caution to appear in the Treatment Display Screen. is is only a cautionary warning to let you
know that the soundhead is approaching the temperature limit. You may, however, continue with the treatment at this level.
If your whirlpool temperature is hot enough to cause the treatment to stop, you will need to adjust the temperature of the
whirlpool.
Soundhead Temperature Too Cold
If the soundhead has been sitting in a very cold room or vehicle, it could be too cold to operate when you plug it into the
console. e keypad may not respond to key presses and you will be unable to use the device until the soundhead is suciently
warmed. You must raise the temperature of the soundhead to about 60 degrees F in order for the machine to recognize that the
soundhead is present and to proceed with setting up a treatment. You can accomplish this with any of the following methods:
1. Press the at face of the soundhead against the palm of your hand for 30 to 60 seconds to warm it slightly. is
usually provides adequate warmth to the crystal to raise the temperature to the minimum acceptable level. Once the
crystal reaches this level, you can proceed with treatment.
2. You can also place the soundhead in room temperature water to warm the crystal. However, do not place the
soundhead in very hot water when the crystal is this cold as it could damage the crystal.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 58
ULTRASOUND PROBLEM SOLVING
No Soundhead
If the device cannot detect a soundhead during setup or deliver y of an Ultrasound treatment, the error message “SOUNDHEAD
IS NOT CONNECTED, HEAD WARMING WILL BE DISABLED!” will appear in the Treatment Display Screen. If this
error occurs, check to be sure the soundhead is rmly plugged into its connector. If you are unable to clear the message by
reconnecting the soundhead, contact Dynatronics’ customer service department at 1-800-874-6251 for assistance.
Miscellaneous
Certain conditions can cause an error in operation. When this occurs, the machine will not allow a treatment to be set up or
delivered and will display an error message. Some errors are easily resolved by the following methods.
• Press STOP to stop the treatment, and turn the machine OFF then ON again. Always wait 5-10 seconds before
restarting the device.
• Check to be sure the soundhead has not become disconnected from the machine. e soundhead should be rmly
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.
• Make sure the soundhead is not too hot. In this case the Soundhead alert will appear in the Treatment Display Screen.
• Check to see if conditions may have caused extreme moisture condensation in the device. is could occur when
the machine has become very cold then is brought indoors to a warm, humid environment. Condensation is a not
a serious condition. Allow the machine to sit in a dry environment until the condensation dries. e machine will
operate normally once the condensation is gone.
If you have tried all of these suggestions, the device may require service by the manufacturer. In this case, 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 rst contacting the Customer Service Department.
Replacing the Soundhead
e Ultrasound probe is a “smart” probe. e treatment head contains a microcontroller to store calibration data and
communicate that data to the console when the probe is plugged into the device. is feature allows the user to change
soundheads on the console without entering the calibration data associated with each soundhead. Soundheads should still
be calibrated on an annual basis.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 59
ULTRASOUND PROBLEM SOLVING
Ultrasound Specications
Ultrasound Power output:
2cm2 head: .........................1 MHz, 2 MHz, 3 MHz ..................... 0-4 watts; 0-2.0 w/cm2 ± 10%
5cm2 head: .........................1 MHz, 2 MHz, 3 MHz ................... 0-10 watts; 0-2.0 w/cm2 ± 10%
10cm2 head: .............................1 MHz, 2 MHz .......................... 0-20 watts; 0-2.0 w/cm2 ± 10%
10cm2 head: ....................................3 MHz .................................. 0-10 watts; 0-1.0 w/cm2± 10%
Ultrasound Regulation and Technical Information
For the Dynatron 825, and 925 Only
e Dynatron 825, and 925 comply with the following:
• FDA 21CFR 1050(c)(1)(i). e 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.
• FDA 21CFR 1050(c)(1)(ii). e sum of the errors in the indications of temporal-maximum ultrasonic power and the
ratio of the temporal-maximum eective intensity to the temporal-average eective intensity shall not exceed ±20
percent for all emissions greater than 10 percent of the maximum emission.
• FDA 21CFR 1050.10(c)(2). e treatment timer must be accurate to within 0.5 minute of the preset duration of
emission for settings less than 5 minutes, to within 10 percent of the preset duration of emission for settings of from
5 minutes to 10 minutes, and to within 1 minute of the preset duration of emission for settings greater than 10
minutes.
NOTE: e Dynatron 25 Series 825 and 925 are accurate to within ±1% of any treatment time.
Pursuant to FDA 21CFR 1050.10(f)(1), the uncertainties in magnitude, expressed in percentage error, of the ultrasonic
frequency, eective radiating area, and the ratio of the temporal-maximum to temporal-average eective intensity, pulse
duration, and pulse repetition rate for the Dynatron 25 Series 825 and 925 are as follows:
(1) Ultrasonic frequency ....................................................................................................... ±15%
(2) Eective Radiating Area ................................................................................................. ±20%
(3) Ratio of the temporal-maximum to temporal-average eective intensity ............... ±20%
(4) Pulse duration .................................................................................................................. ±10%
(5) Pulse repetition rate ........................................................................................................±10%
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 60
ULTRASOUND BEAM PROFILES
Ultrasound
Beam Proles
(For Dynatron 25 Series 825, and 925 users only. e Dynatron 25 Series 525 and 625 do not oer Ultrasound). e following
diagrams show the typical spatial distribution of the radiated eld for each size Dynatron 25 Series soundhead. is applies
to the radiation emitted into the equivalent of an innite medium of distilled, degassed water at 30˚ C and with line voltage
variations in the range of ±10 percent of the rated value.
10 cm2 Head. Near Field
1MHz
2 MHz
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 61
3 MHz
ULTRASOUND BEAM PROFILES
5 cm2 Head. Near Field
1MHz
2 MHz
3 MHz
2 cm2 Head. Near Field
1MHz
2 MHz
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 62
3 MHz
COMBINATION THERAPY INSTRUCTIONS
Combination
Therapy Instructions
e following combination therapy instructions are for 25 Series 825 and 925 USERS ONLY. e 525 and 625 do not oer the
Ultrasound feature.
WARNING
• DO NOT use combination therapy for underwater treatment. Placing active electrodes underwater poses a
serious hazard to the patient!
• Use VERY LOW STIM INTENSITY for COMBO treatments.
• Remember to observe all contraindications, warnings, precautions, and usage cautions for BOTH Ultrasound
and Electrical Stimulation therapy when performing combination therapy.
• Since electrical current travels between the electrode and the soundhead during a COMBO treatment, the
electrode should be placed in proximity with the treatment area. Do not place the electrode and soundhead in
positions that will cause current to pass through contraindicated areas.
• Avoid removing the soundhead from the skin surface during “Stim rough Soundhead” treatments as
this may cause a momentary interruption of Stim current which may be uncomfortable to the patient. e
soundhead should remain in full contact of the skin until current output is stopped.
• Be alert for any sign of periosteal (bone) pain.
Comboplus
Dynatronics’ Comboplus feature means you have almost unlimited options in setting up a combination treatment with 25
Series. You can:
• Combine an Ultrasound treatment with the following electrotherapy modalities provided by this device: IFC,
Premodulated, Biphasic, Russian, or High Volt.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 63
™
COMBINATION THERAPY INSTRUCTIONS
• Set up a combination treatment by using the ULTRASOUND output jack and the automatically selected default
STIM channel.
A special “COMBO” lead wire is provided with the 825 and 925 with the standard accessories for this device to accommodate
the ComboPlus feature. is lead wire is plugged into the selected STIM jack; then the banana end of the lead is connected to
the COMBO input jack on the right-side of the device, and the pin end of the lead is connected to an electrode to be placed
on the patient. It is important to note the channel selected by the device during setup and connect the lead wire to the correct
channel before setting intensity for the treatment.
Stim Through the Soundhead
With combination therapy, the soundhead is used in place of one electrode for a Stim treatment; and electrotherapy current
is delivered through the soundhead. is means that for a normal 2-electrode Stim treatment therapy, you would place
one electrode on the patient and use the soundhead as the second electrode site to complete the setup. A patient lead wire
designed to accommodate this setup is included in the Dynatron 25 Series standard accessory package for devices with
Ultrasound and electrical stimulation capabilities.
During the treatment, the Stim current passes between the soundhead and the other electrode. At the same time ultrasonic
waves are introduced into patient tissue through the soundhead. Avoid touching the electrode with the soundhead during
the treatment, keep the soundhead in contact with the patient’s skin at all times, and keep the intensity low for the Stim
current.
When setting up a combination treatment, observe all contraindications, warnings, and precautions for both
therapies to be used.
REMEMBER: Use very low Stim intensities for all COMBO treatments!
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:
• When a modality indicator is highlighted GREEN, the treatment parameters for that output are displayed. Any
changes you make to the parameters will aect that channel only.
• When a modality indicator light is highlighted YELLOW, the channel is active, but its parameters are not being
displayed (in focus) and may not be modied at this time. To bring a treatment’s parameters into focus, you must
rst press the CHANNELS toggle key to select the treatment—the modality indicator will then become GREEN and
modications are allowed.
• When using the 825 or 925, since Ultrasound and Stim share the TIME and INTENSITY displays during a
combination treatment, you will need to carefully observe which modality is in focus when setting up or changing
treatment parameters. You may toggle between the Stim and SOUND channel using the CHANNELS toggle key. e
treatment timer does not begin until you press START aer both modalities have been set up.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 64
COMBINATION THERAPY INSTRUCTIONS
Combination Therapy Setup
1. Press the COMBO key on the 825 and 925. SOUND will be illuminated GREEN in the CHANNELS window and
an automatically selected STIM channel will be illuminated in YELLOW. Other available channels not in use will be
illuminated in WHITE.
2. Plug the combo lead wire into the active STIM channel jack of the 825 or 925. e banana connector end plugs
into the COMBO input jack on the right-side of the unit. e pin end attaches to the dispersive electrode.
3. Apply the dispersive electrode to the patient
4. With SOUND illuminated GREEN, select parameters for the Ultrasound portion of the COMBO treatment
following the instructions found in the manual.
5. Press START.
NOTE: Although parameters and settings are selected for ultrasound therapy, no ultrasound power will be delivered
until you press START aer both the ULTRASOUND and STIM modalities have been set up.
6. When using the 825 or 925 press the single-channel STIM option of your choice. e selected STIM channel’s
illumination will change from YELLOW to GREEN and become the focus treatment. NOTE: If selecting a Stim channel,
other than the default channel, the illuminated channel will change from WHITE to GREEN. e SOUND channel will
now be illuminated YELLOW. Proceed to set up the STIM treatment following the modality instructions found in the
manual.
Remember, High Volt must use the designated HI-VOLT Channel. e system defaults to a PREMOD treatment
selection unless another default therapy has been selected previously.
7. Apply the conductive gel to the Ultrasound treatment site now. Place the soundhead at the treatment site making
good contact with the skin.
8. Raise the Stim intensity. KEEP THE STIM INTENSITY LOW! If the soundhead is in proper position and coupling
is good, the patient will feel the current. If the patient does not feel the current, check to be sure coupling is good and
make sure you have used ample conductive gel.
9. Press START. Both STIM and ULTRASOUND will be activated.
10. S T O P.
When the treatment time has elapsed, the therapy to the patient stops and a tone sounds notifying you of the
treatment end. Treatments in progress may be stopped at any time using one of the following methods.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 65
COMBINATION THERAPY INSTRUCTIONS
ALL STOP: Press the STOP key to stop all treatments at all channels on the 825 and 925 devices. e output for
the channel(s) selected is stopped (both STIM and SOUND channels), and the device then displays the beginning
treatment parameters.
STOP ONE TREATMENT ONLY ( 825 AND 925 Plus): If you have more than one treatment in progress, stop one
treatment by either of the following methods. First, press the CHANNELS toggle key to select SOUND or press the
active STIM modality key, the channel’s light will be illuminated GREEN when selected. Once selected press and
hold the FUNCTION key and press the STOP key. Or, REDUCE THE TREATMENT TIME TO ZERO. Press the
Time down arrow until the Time display reaches zero. e device beeps when the time reaches zero.
NOTE: Pausing a COMBO Treatment
In COMBO mode, if a treatment is paused by any means (either by pressing the PAUSE key or as a result of a
soundhead that has become too hot), the Ultrasound output is stopped and the treatment timer is paused. However,
the Stim current continues to be delivered. erefore, the pause condition should be corrected as quickly as possible
and the treatment resumed, or the treatment should be stopped completely by pressing the STOP button.
Modify A Treatment
Modications to a treatment in progress may be made to both modalities used. See the instructions earlier in this manual
for specic modication instructions for each modality.
Combination Default Settings
e factory default for a COMBINATION TREATMENT is an Ultrasound treatment with a Premodulated treatment and the
respective default settings for those two modalities.
In COMBO mode you can save new default treatment time and the preferred Stim modality. e Stim settings in a COMBO
treatment are determined by the defaults of that modality. Separate Ultrasound default settings may be saved for the COMBO
treatment which will not aect Ultrasound-only treatments.
If you save defaults during a COMBO treatment the following settings are saved:
• e Stim modality that is selected for the current COMBO treatment is saved as the default Stim treatment for COMBO.
• Ultrasound parameters for this setup are saved, and become the default Ultrasound settings for combination
treatments only (non-combination Ultrasound treatments may have dierent default settings).
• e treatment time is saved as the default treatment time for combination treatments.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 66
SIMULTANEOUS TREATMENTS
Simultaneous
Treatments
e Dynatron 25 Series allows many 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. A COMBO treatment is always delivered to one patient. Simultaneous treatments
are independent treatments that are set up separately, that have separate treatment timers, and which may be delivered to one
or more patients at the same time.
ere are very few limitations to the simultaneous treatments that may be set up with the Dynatron 25 Series. You can set up
any number of separate treatments as described below with the exceptions noted:
• Channels 1 through 4 may be used for any number of Interferential, Premodulated, Russian, or Biphasic treatments.
For treatments using one channel, the device will select the next available channel. For treatments using two channels,
the device will select a channel pair (1-2 or 3-4). Note: Channels 3-4 are available on 25 Series 625 and 925 only.
Set Up A Second Treatment
To set up the second (or third) treatment, aer you have set up and started the rst modality, press the modality key for the
second treatment to be set up. e device automatically selects the treatment channel(s) to be used. e GREEN channel
light shows you the channel(s) selected for this treatment. Plug the lead or cable into the corresponding output jack(s) before
you proceed with setting up the treatment. Select the treatment parameters for the second treatment following the setup
instructions for that modality provided in this manual. When parameters have been entered, press START.
Modify Simultaneous Treatments
You may VIEW and MODIFY parameters for the treatment channel(s) that is illuminated GREEN. While two or more
treatments may be in progress at once, the TIME / INTENSITY displays can show only the settings for the focus treatment
whose operational channels are illuminated GREEN. Other channels in use at that time will be illuminated YELLOW
indicating that the channels are active (delivering current) but their parameters are not currently displayed or in focus.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 67
SIMULTANEOUS TREATMENTS
All channels that are currently operational but not in focus, are listed both in the CHANNELS window and in small font on
the le-hand side of the Treatment Display Screen under the heading, RUNNING TREATMENTS. Included in the list under
RUNNING TREATMENTS, is the active channel(s) illuminated in YELLOW; and the name of the treatment modality with
the remaining treatment time, both illuminated in White.
To change the settings for a channel or output that has a YELLOW light, press the CHANNELS toggle key one or more times
until the light for the desired channel becomes GREEN. e TIME and INTENSITY displays change to show the parameters
currently in eect for that treatment. Once a treatment is in focus, the parameters may be changed.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 68
CONTRAINDICATIONS, WARNINGS, & PRECAUTIONS
Contraindications,
Warnings, & Precautions
for Interferential, Premodulated, Russian, Biphasic, and High Voltage Pulsed Stimulation.
Contraindications
rombosis. It is possible that the current produces chemical changes in the blood leading to alterations in the clotting time.
At present there is no specic scientic evidence to support this. Nevertheless, treatment must not be given to any patient
who is taking anticoagulants as it may render these ineective. e eect of the current is on the platelets and would tend
to spread any clot with perhaps fatal results in a patient with coronary thrombosis. If a patient has a history of deep vein
thrombosis, even many years past, the treatment may increase rather than decrease swelling.
Implanted Electronic Devices. Patients with Implanted Electronic Devices (for example a cardiac pacemaker) should not
be subjected to stimulation.
Cardiac Conditions. e electrodes should be placed to avoid the stellate ganglion and the heart itself. If there is a potential
for heart problems, the clinician must exercise professional judgment and use adequate precautions. e clinician should not
expose the patient to risk if possible heart problems are suspected.
Bacterial Infections. e eect on bacteria is uncertain, and it is advisable that bacterial infections should not be treated.
Malignancy. e use of Interferential, Premodulated, High Volt, Biphasic, or Russian Stim treatment is contraindicated in
patients with clinically diagnosed cancer.
Warnings
oracic applications are contraindicated: Additional warning from the Canadian Health and Welfare Department,
Health Protection Branch. Cardiac brillation may occur if output current is 50 mA RMS or greater for any output circuit.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 69
WARNING
CONTRAINDICATIONS, WARNINGS, & PRECAUTIONS
1. Adequate precautions should be taken in the case of persons with suspected or diagnosed epilepsy.
2. Severe spasm of the laryngeal and pharyngeal muscles may occur when the electrodes are positioned over the neck
or mouth. e contractions may be strong enough to close the airway or cause diculty in breathing.
3. Caution should be used in the transthoracic application of EMS devices in that the introduction of electrical current
into the heart may cause arrhythmia.
4. is device should be kept out of the reach of children.
5. e Dynatron device should not be used in the following conditions:
• Pregnancy
• Acute and sub-acute thrombophlebitis
• Potentially malignant lesions
• Implants of any electrical nature
• Do not use over a carotid sinus
• Transcerebrally
• Disturbances in cardiac rhythm
6. e long-term eects of chronic electrical stimulation are unknown.
7. is device should not be used to relieve pain syndromes until etiology has been established.
8. Current densities for any electrodes exceeding 2 mA r.m.s./cm2 may require the special attention of the USER.
Precautions
1. Precautions should be observed following recent surgical procedures when muscle contractions may disrupt the
healing process.
2. Some patients may experience skin irritation or hypersensitivity due to the electrical stimulation or electrical
conductive medium. e irritation can usually be reduced by use of an alternate conductive medium or alternate
electrode placement.
3. Interferential, Premodulated, Biphasic, Russian, and High Volt therapy 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.
• Over the menstruating uterus.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 70
CONTRAINDICATIONS, WARNINGS, & PRECAUTIONS
4. Use extreme caution when administering a treatment where sensory nerve damage is present or in any\case where
there is a loss of normal skin sensation; this includes areas desensitized by medication or ice. When treating an area
where there is loss of feeling, there is an increased danger of injuring the patient. Do not treat such areas unless you
have sucient training and experience in applying this therapy for such cases and you are condent you can deliver
the treatment safely without injuring the patient.
When treating any conditions contributing to loss of sensation, or any time the patient cannot feel the electrical
stimulation, do not exceed an intensity setting of 12-15 when using large electrodes (3-3/4" x 1-3/4") or an intensity
setting of 8-10 when using small electrodes (1-3/4" x 1-3/4"), and select short treatment times (approximately 8
minutes). Be alert for any irregularities in the skin following the treatment.
Never use High Volt therapy to treat an area where there is a loss of normal skin sensation.
5. Do not use in general area where high-powered, high-frequency transmitting surgical units are being operated.
Short wave diathermy should not be turned on or used at the same time as this Dynatron device.
6. Do not use the same power outlet or line with a whirlpool and certain traction machines. In areas which are
carpeted and static electricity is present, it may be necessary to use a conductive mat or anti-static carpet treatment
to remove any static charge from the operator before touching the device.
7. To avoid causing possible interference with the operation of the Dynatron device, it should not be connected to
anyone who is wearing or holding an RF transmission device (two-way radio, cell phone, beeper, etc.)
Treatment Setup Warnings
1. NEVER turn the power on or o while the unit is connected to the patient.
2. Always STOP a treatment before removing or attaching electrodes or leads to the patient. Leads and electrodes must
only be applied to the patient before a treatment is started.
3. Never use worn or damaged leads or electrodes as these may result in injury to the patient. Check leads using the
Lead Test function provided by this device.
4. Electrodes must be attached and probe placed in contact with the patient’s skin (if applicable) prior to starting a
treatment.
Adverse Effects
Skin irritation and burns beneath the electrodes have been reported with the use of electrotherapy.
Any electrical stimulation has the potential to burn or irritate a patient’s skin. e tendency towards burning is dependent
upon several factors; the most important being patient susceptibility and current density. e practitioner has little control
over patient susceptibility, other than to observe rst time patients carefully. However, current density is totally controllable.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 71
CONTRAINDICATIONS, WARNINGS, & PRECAUTIONS
It is important to note that the intensity displayed is not a measurement of the current delivered. For Interferential,
Premodulated, Biphasic and Russian Stim, this is a relative reading only. Current delivered at a given intensity setting is
dependent upon the current setting, the size and type of electrodes used, and conductance.
Current density is the amount of current delivered, divided by the area through which the current is being delivered. Higher
current density increases the tendency to burn or irritate. e current density can be reduced by decreasing the amount
of current or increasing the area through which the current is being delivered. e area can be increased by using larger
electrodes and/or making sure that the total area of the electrode is actually delivering current. Current density is also
reduced when more electrodes are used (four instead of two).
Electrodes which are worn or have lost their adhesiveness, or carbon electrodes which are corroded and are not securely
fastened, fail to deliver current evenly as required. ese kinds of electrodes may have “hot spots” where higher than normal
current density will be delivered. If the patient complains of “pin prick” sensations, the electrode may be delivering current
through only a small portion of its area, and the electrode should be replaced. Also see “Electrotherapy Usage Cautions” in
this manual for further discussion regarding safe use of leads and electrodes.
Use Only Dynatronics Accessories
e 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.
Only use electrodes which are designed for use with this device. NEVER use monitoring electrodes such as ECG, EKG,
or EMG. NEVER use electrodes specied only for TENS devices as those electrodes may not be adequate for use with
the electrotherapies provided by this device.
Contact Dynatronics Customer Service if you have questions about appropriate electrodes for use with this device.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 72
CONTRAINDICATIONS, WARNINGS, & PRECAUTIONS FOR ULTRASOUND TREATMENT
Contraindications,
Warnings, & Precautions
for Ultrasound Treatment
Contraindications
e Dynatron 25 Series Ultrasound should not be applied in the following CONDITIONS:
• Pregnancy
• Acute and sub-acute thrombosis and thrombophlebitis
• Potentially malignant lesions, tumors malignant or benign
• Areas or lumps that may be suspected as cancerous or precancerous
• ird degree musculo-tendonous lesions
• Cardiac pacemaker or other implanted electronic device
• Implants of any electrical nature
• Skin diseases
• Multiple sclerosis
• Osteomyelitis
• Disturbances in cardiac rhythm
• Tissue or bone with acute sepsis
• Arteriosclerosis or weakened blood vessels
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 73
CONTRAINDICATIONS, WARNINGS, & PRECAUTIONS FOR ULTRASOUND TREATMENT
• Hemophilia
• Where sensory nerve damage is present with a loss of normal skin sensation.
e Dynatron 25 Series Ultrasound should not be applied to the following AREAS:
• Transcerebrally
• To the eye
• To the ear
• Over a carotid sinus
• To the heart
• To major subcutaneous nerves and blood vessels
• To the spinal cord
• Around the bulbar area of the spinal cord
• To reproductive organs
• Over viscera (stomach, spleen, liver)
• Over epiphyseal areas of the bones in growing children
• Over stellate ganglion and subcutaneous major nerves
• To tissues previously treated by deep x-ray or other radiation
• Over the joint capsule in acute or sub-acute arthritic conditions
• Over ischemic tissue in patients with vascular disease
• Over a laminectomy site
• Over total joint replacements (the eect of Ultrasound on the new plastics is unknown)
e Dynatron 25 Series Ultrasound should not be used over healing fractures.
INTENSITY (POWER) SHOULD BE REDUCED IF PATIENT COMPLAINS OF PERIOSTEAL BONE
PAIN (BONE ACHE)
Precautions
e Dynatron 25 Series Ultrasound devices 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.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 74
CONTRAINDICATIONS, WARNINGS, & PRECAUTIONS FOR ULTRASOUND TREATMENT
Warnings
• Do not use in general area where high-powered, high-frequency transmitting surgical units are being operated.
Short wave diathermy should not be turned on or used at the same time as this Dynatron device.
• Do not use the same power outlet or line with a whirlpool and certain traction machines.
• In areas which are carpeted and static electricity is present, it may be necessary to use a conductive mat to remove
any static charge from the operator. Use a surge suppressor if power problems are encountered.
• Avoid unnecessary exposure to Ultrasound (patient and therapist).
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 75
TECHNICAL INFORMATION
Technical
Information
CAUTION
ere are no serviceable parts in 25 Series devices.
Setting Defaults
Each of the modalities has default settings that are automatically selected when a modality key is pressed. e default settings
feature allows previously used treatment parameters to be set up in just seconds. For guidance in selecting the appropriate
settings for each modality, consult published medical literature.
Save New Defaults
If your most common treatment settings are dierent than the ones already set for this device, you can change the defaults
to suit your own preferences. Setting new defaults is simple and defaults may be changed again and again whenever needed.
1. Press the modality key desired (IFC, Premod, Russian, Biphasic, High Volt, Micro, Ultrasound, or Combo).
2. Set up a treatment using your preferred settings.
3. If this is an actual treatment you may increase the intensity now (intensity is not saved with the default settings). is
step is optional.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 76
TECHNICAL INFORMATION
4. PRESS and HOLD the START key for two full seconds to SAVE the new settings. A beep will sound signaling that
the new settings have been saved.
If the intensity was set before you pressed the START key, the treatment will begin upon pressing START. You may
proceed with delivering the treatment now, or you may stop the treatment.
Restore Factory Defaults
If you have saved your own defaults, but would like to return ALL the default settings to those that were set at the factory,
do the following:
1. Turn the machine o and wait ve seconds.
2. Turn on the machine. Following initialization, DYNATRONICS appears in the Display Screen.
3. Press and hold the START key down until three beeps are sounded. e Factory Defaults have now been restored for
all modalities. You may now proceed with treatment setup.
4. To restore the factory defaults of only one modality, set the defaults to the settings referenced on pages 8, 9, and 10
of this manual. Press and hold the START key until a beep is heard.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 77
BATTERY OPERATION
Battery Operation
Use ONLY a Dynatronics’ Approved Battery
Before purchasing or using an existing battery with a 25 Series device, contact Dynatronics or your Dynatronics
Representative to obtain specications for a battery that may be safely used with a 25 Series 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.
All 25 Series devices are manufactured with battery capabilities allowing you to deliver treatments wherever power may be
unavailable or unreliable. To use the optional battery, do the following:
1. It is recommended that a battery be charged for 24 hours prior to operating the 25 Series device. DISCONNECT the
battery charging cable from the battery while it is in use for treatment.
2. Plug the battery adapter into the jack labeled “BAT-INPUT 12V-DC” on the back of the Dynatron 25 Series console.
3. Set up and deliver treatments.
4. When battery power is reduced to approximately 11 volts, a low battery warning will be displayed in the lower
right-hand corner of the Treatment Display Screen “CAUTION: BATTERY LEVEL GETTING LOW!” e treatment
can continue however there will not be enough power to set up and deliver another treatment when the current
treatment has ended.
5. When the available battery power becomes too low to continue operating the device, the following message will
appear: “ERROR: BATTERY LEVEL TOO LOW FOR TREATMENT OPERATION. CHARGE IMMEDIATELY!”
e treatment intensity will ramp down, any treatments that were running at the time will stop, and the device will
shut down. Before battery operation can continue, the battery must be recharged.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 78
BATTERY OPERATION
Battery Life
Note: If using a smaller gauge wire (20 AWG and up) the BATT LOW error is possible when the battery is not low.
• 12 volt and at least 5 amps hours.
• Battery adaptor cord must match the plug end of the battery pack. e barrel plug end must match the 0.325” barrel
jack adaptor plug on the 25 Series device.
• e cord needs to be a minimum of 18 AWG gauge wire. 14-16 AWG gauge wire will work as well with a 5 amp fast
blow fuse.
Battery Life
e length of time that a unit can be used with a battery pack is dependent on several factors:
CAUTION
When a battery is employed to operate the 25 Series devices, Ultrasund may deplete the battery rapidly.
• e amperage of the battery pack. Larger amperage will provide longer use.
• e modality used. Light erapy treatments require more power than Ultrasound or Stim modalities while
Ultrasound requires more power than Stim modalities.
• e intensity of the treatments. e higher the intensity, the higher the consumption of power.
• e use of multiple treatments. e more channels used, the more power is consumed.
• e amount of charge remaining on the battery.
As a general rule, the unit may be run continuously for 30 minutes to several hours depending on these factors.
CAUTION
Follow battery manufacturer’s instructions for usage and care. When disposing of a used battery, comply with the
laws and procedures required in your area.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 79
GENERAL SPECIFICATIONS
General
Specications
Other ranges, accuracy and precision values that are not provided here may be obtained from Dynatronics upon request.
Dynatron 25 Series Specications
Power Requirements ................................................................................. 100-240 V~, 50/60 Hz
Power Consumption ........................................................................................................100 Watts
Fuse: ............................................................................................................... 250V, 1.6A slow blow
Dimensions ......................................18.5" W (41.91cm) x 4.0" H (10.2cm) x 12.0" D (30.5cm)
Weight ..............................................................................................................8.2 pounds (3.7 Kg)
Environmental Conditions
Transport and Storage
is equipment, while packed for transport or storage, should not be exposed to environmental conditions outside the
following ranges:
+70°C
a. an ambient temperature range of -40°C
b. a relative humidity range of 10% to 100% including condensation
c. an atmospheric pressure range of 500 hPa to 1060 hPa
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 80
GENERAL SPECIFICATIONS
Operation
is equipment is designed to operate in normal use under the following environmental conditions:
+30°C
a. an ambient temperature range of +10°C
b. a relative humidity range of 30% to 75% including condensation
c. an atmospheric pressure range of 700 hPa to 1060 hPa
Safety Features of the Dynatron 25 Series
• Double redundancy protection on output ampliers.
• Current sensing. If current reaches the current limit for the device, intensity is automatically reduced.
• 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.
• e Power Cord is considered the ‘disconnect device’ when it is necessary to ensure that the device is disconnected
from a power source (for service or otherwise). Do not position the device such that it would be dicult to disconnect
the power cord from the device.
• Soundhead temperature monitoring prevents the soundhead from becoming too hot, both to protect the soundhead
crystal from damage and to ensure patient comfort.
Care and Cleaning Instructions
25 Series Console
• Clean the outer surface of the 25 Series devices with a slightly damp or lightly moistened cloth. Mild household
cleaners work well on the frame, but do not use cleaners on the display windows. Do not spray the solution directly
on the unit. . Solvents, caustic solutions and harsh or abrasive cleaners must never be used.
• Do not attempt to sterilize the device or its probes or pads, using any type of sterilization equipment including
autoclaves.
• Avoid stretching cords to full length, bending cords sharply or wrapping cords tightly. Undue stress on cords can
damage connections.
• Keep all food and drinks away from the machine and its accessories; spills can cause costly damage to the machine
and repairs for this type of damage are not covered by the warranty.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 81
GENERAL SPECIFICATIONS
Ultrasound Head
• Ultrasound heads should be cleaned with warm water. Always keep the head free from gel buildup. Alcohol may be
used to sterilize the soundhead.
• Do not use ice water for cooling soundheads. Do not allow soundheads to overheat repeatedly. is could result in
thermal shock to the crystal. Damage of this type is not covered by the warranty.
• Do not drop the unit, probe, or the soundheads as severe damage will occur.
Suggested Maintenance Schedule
Service To Be Performed By A Technician:
Every 6 Months
• Test leads and carbon electrodes. Lead resistance should be less than 10% above the mean cable resistance.
Greater values indicate strand breakage and lead should be replaced.
Annually
• Annual Ultrasound calibration should be performed by a qualied technician.
• Check the output voltages and currents on all outputs.
• Inspect soundhead connectors on unit and on soundhead.
• Verify DAC calibration and current limits.
• It is recommended that the 25 Series device be sent to the manufacturer for annual calibration.
Maintenance Performed By User:
1. Inspect accessories daily for wear and damage. Examine cables and connectors on the cables for any visible sign of
wear or damage. Replace accessories as needed:
• Replace lead wires and carbon electrodes at least every six months.
• Replace self-adhesive electrodes aer not more than 15 uses.
2. Examine Ultrasound heads periodically for cracks which may allow ingress of conductive uid.
3. If a machine or soundhead is dropped, or if it sustains damage due to lightning, severe power surge, submersion
in water, or other incident that could cause damage to electronic components, the device must be examined by a
Dynatronics technician before being returned to clinical use.
4. For older devices contact Dynatronics or your Dynatronics dealer for information and pricing for current upgrades
to your device. Even if the machine is functioning properly, you can send it to Dynatronics for preventative
maintenance service for a nominal charge; call for pricing.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 82
GENERAL SPECIFICATIONS
5. Inspect device air vents periodically to ensure air ow is not blocked. An ordinary household vacuum hose may be
used to clean dust from air vents externally.
6. Immediately report any device malfunction to Dynatronics Customer Service Department (800) 874-6251.
7.
Hazardous electrical output. To reduce the risk of electrical shock, do not remove cover. Refer servicing to
8.
qualied service personnel.
WARNING
CAUTION
For continued protection against risk of re, replace fuses only with type IEC 60127. For 120/240VAC
supply, use 250V, 1.6A slow-blow.
NOTE: BEFORE sending a device to Dynatronics for service, you must FIRST obtain a return authorization
number. Call Dynatronics’ Customer Service Department at (800) 874-6251 and discuss any problems or required
service to save time and ensure the machine is returned to you as quickly as possible. See Section below “Returning
a Unit for Repair.”
Routine Ultrasound Calibration Inspections for 25 Series
Government agencies regulate the frequency at which Ultrasound units must have their calibration checked. e device must
still be examined at the periodic intervals specied by the governing agency for the country in which the device is used. To
have the inspection performed by Dynatronics contact Dynatronics’ Customer Service Department. e 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. e calibration procedure
MUST be performed by a qualied Ultrasound technician using the proper equipment, and is recommended every 6 to 12
months.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 83
GENERAL SPECIFICATIONS
Software Updates
When Soware updates to the 25 Series devices become available, updates can be made quickly and easily by completing the
following steps:
1. Turn o the console.
2. Insert the SD card supplied by Dynatronics into the SD CARD slot on the le-side of the console (ngers of the SD
card facing up, label side down).
3. Turn on the console. ere will be a 3 to 4 second pause while the card syncs with the 25 Series system soware. A
RED screen will appear with the following warnings: “DO NOT DISCONNECT POWER,” “DO NOT TURN OFF”
25 Series Soware Update Screens
4. Press START to begin the download. Follow the instructions on the screen.
NOTE: All custom defaults will remain eective aer the new soware is downloaded.
CAUTION
e download process erases the device memory. If the download process is stopped for any reason prior to
completion, call Dynatronics for further instructions.
5. Remove the SD card from the SD CARD slot by gently pressing on the card. Turn o the console.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 84
GENERAL SPECIFICATIONS
Returning a Unit for Repair
Return Authorization
If it becomes necessary to return a 25 Series unit for repair, contact Dynatronics’ Customer Service (800) 874-6251. All returns
must have a Service Order Number (SVO). e following information will need to be supplied when calling Dynatronics’
Customer Service to obtain a return Service Order Number (SVO):
1. User name and address
2. User phone number
3. Serial number of the unit
4. A description of the problem with the unit
Aer receiving the Service Order Number (SVO), the number should be clearly written on the outside of the shipping container.
Packaging and Shipping of Replacement Parts
All defective or broken parts should be shipped back to Dynatronics in the original shipping container. ese containers are
designed to withstand the punishment of shipping. If the original containers are not usable, nd containers that are similar
in protection so damage in shipping will be prevented. e person or company sending the unit to Dynatronics is responsible
for any shipping damage resulting from a poorly packaged part or unit.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 85
GENERAL SPECIFICATIONS
Denition of Symbols and Labeling
Some or all of the following symbols are included in the labeling for this device. Denitions accompany each symbol.
Alternating Current
Caution
On/Off (power: connection to the mains)
Type B (patient-applied part)
Type BF (patient-applied part)
Follow Instructions for Use
Keep Dry
Non-ionizing Electromagnetic Radiation
Made in USA
Temperature
Humidity
Model Number
Serial Number
Fuse
European Conformity
Maintenance
Battery Input
Secure Digital Card
Dynatronics Manufacturer Location
Manufacturing Date
Safety Certication for Canada and the USA. Certied to IEC60601-1
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 86
GENERAL SPECIFICATIONS
e following labels appear on the 25 Series consoles, Ultrasound Heads.
25 Series 825 and 925
25 Series 525 and 625
Manufactures Label
Ultrasound
Equipment Classication
is device is classied as follows:
• Protection against electric shock: Class I (protectively earthed enclosure)
• Protection against electric shock: Type BF (oating patient-applied part)
• Protection against harmful ingress of water: none
• Equipment not suitable for use in the presence of a ammable anesthetic mixture with air or with oxygen or nitrous oxide.
• Mode of operation: Continuous operation
Disposal of Equipment and Accessories
ere is no risk posed in disposal of this equipment or its accessories. ese items contain no hazardous materials.
For disposal of accessory batteries, see manufacturer’s instructions and follow applicable laws and regulations in your area.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 87
BASIC TROUBLESHOOTING TECHNIQUES
Basic Troubleshooting
Techniques
Lead Testing
Leads may easily be tested without any special equipment by using the “Lead Test” function of the 25 Series console. A DMM
can also be used to see if the pads and leads are in good working condition. Electricity will always choose the path of least
resistance to ground. If it does not have a good path or a complete circuit, it cannot ow and no stimulation will be felt. is
is why good leads and pads are so important in the operation of the Dynatron 25 Series electrotherapy device.
1. Insert the lead wire that is to be tested into the CH 1 output jack
2. Press the “FUNCTION” key on the right side of the User Interface board
3. Turn on the LEAD TEST function by toggling the 5th so key under the right side of the LCD
4. Touch the two leads at the end of the cable together
5. e conductance bar will increase from le to right indicating the quality of the electrical conductance through the
lead wire
6. A “good” lead wire will show a green bar greater than 50% of the total conductance bar and a conductance reading
of greater than 200
7. Prior to touching the two leads together the conductance reading will be “0” and the bar will not display a reading
8. A “bad” lead wire will not show conductance or will uctuate below 200 when the cable is moved around, indicating
that the lead has an intermittent open.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 88
BASIC TROUBLESHOOTING TECHNIQUES
Testing Carbon Pads
e carbon pads can be checked with the DMM. is is done with the resistance setting of the meter. Set the meter to
“Ohms.” Plug one of the test leads into the pin receptacle of the pad. Touch the other lead to the black carbon surface of the
pad. If a resistance of more than 100 Ohms is seen, the pad is beginning to break down and should be replaced.
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 89
CAN/CSA WAVEFORMREQUIREMENTS
CAN/CSA Waveform
Requirements
“A graphical representation of typical output signals, showing voltage waveforms at half and full setting of the output control
when the EQUIPMENT is connected to resistive loads of 200 ohms, 500 ohms, 1000 ohms and 2000 ohms.”
See the following pages for the graphical representations:
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 90
CAN/CSA WAVEFORMREQUIREMENTS
2000 ohm Load
Mid-Range Full Range
500 ohm Load 200 ohm Load 1000 ohm Load
Interferential Current
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 91
CAN/CSA WAVEFORMREQUIREMENTS
2000 ohm Load
Mid-Range Full Range
500 ohm Load 200 ohm Load 1000 ohm Load
Premodulated IFC
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 92
CAN/CSA WAVEFORMREQUIREMENTS
2000 ohm Load
Mid-Range Full Range
500 ohm Load 200 ohm Load 1000 ohm Load
Russian
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 93
CAN/CSA WAVEFORMREQUIREMENTS
2000 ohm Load
Mid-Range Full Range
500 ohm Load 200 ohm Load 1000 ohm Load
Biphasic
DYNATRON® 25 SERIES™ | OPERATOR’S MANUAL 94
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