User Manual - EMS Physio Ltd
Contents
1. Appendix C EMC tables Guidance and manufacturers declaration electromagnetic emissions The Primo Interferential 960 Multidyne 970 is intended for use in the 2 electromagnetic environment specified below The customer or the user of the 960 970 should assure that it is used in such an environment Electromagnetic environment guidance The 960 970 uses RF energy only for its internal function Therefore its RF Group 1 emissions are very low and are not 3 Emissions test Compliance 4 RF emissions CISPR 11 likely to cause any interference in nearby electronic equipment RF emissions 6 CISPR11 Glass H i PEREN 7 lead not The 960 970 is suitable for use in all applicable establishments other than domestic and IEC 6100 3 2 i those directly connected to the public Voltage low voltage power supply network that ge supplies buildings used for domestic 8 fluctuations not purposes Flicker emissions applicable i IEC 61000 3 3 56 Interferential 960 Multidyne 970 Interferential 960 Multidyne 970 57 Guidance and manufacturers declaration electromagnetic immunity The Primo Interferential 960 Multidyne 970 is intended for use in the electromagnetic environment specified below The customer or the user of the 960 970 should assure that it is used in such an environment Immunity test Electrostatic discharge ESD IEC 61000 4 2 Electrical fast transient burst 1EC61000 4 4 Surge 1EC61000 4 5 Voltage2. Interference may occur in the vicinity of equipment marked with the following symbol l NOTE 1 At 80MHz and 800MHz the higher frequency range applies NOTE 2 These guidelines may not apply in all situations Electromagnetic propagation is affected by absorption and reflection from structures objects and people a Field strengths from fixed transmitters such as base stations for radio cellular cordless telephones and land mobile radios amateur radio AM and FM radio broadcast and TV broadcast cannot be predicted theoretically with accuracy To assess the electromagnetic environment due to fixed RF transmitters an electromagnetic site survey should be considered If the measured field strength in the location in which the Primo Interferential 960 Multidyne 970 is used exceeds the applicable RF compliance level above the Primo Interferential 960 Multidyne 970 should be observed to verify normal operation If abnormal performance is observed additional measures may be necessary such as re orienting or relocating the Primo Interferential 960 Multidyne 970 b Over the frequency range 10kHz to 80Mhz field strengths should be less than 3 V m Interferential 960 Multidyne 970 59 Recommended separation distances between portable and mobile RF communications equipment and the Primo Interferential 960 Multidyne 970 The Primo Interferential 960 Multidyne 970 is intended for use in an electromagnetic environment in which radiated RF disturba
3. Interferential 960 Multidyne 970 Output waveforms Interferential 4 pole A A nt cyce A A A i 1 Channel A XT cycle 7 cycle A AJA AN JA J Channel B Channel A Channel B Carrier Frequenc Period Frequenc Period y y 2 kHz 2 kHz 500 us 1 75 2 572 500 kHz US 4 kHz 4 kHz 250 us 3 75 4 267 250 kHz us 8 kHz 8 kHz 125 us 7 75 8 129 125 kHz us In constant current mode the maximum output current per channel is 100 mA peak 70 mA rms The maximum load impedance in ohms at any given output current is given by Maximum impedance 70000 peak output current in mA In constant voltage mode the maximum output voltage is 70Vpeak or load impedance x 0 1 V peak whichever is the smaller Interferential 960 Multidyne 970 47 Interferential 2 pole lt 1 cycle of carrier 2 4 oe KHz A A h E y E YN 1 cycle of AMF 1 250 Hz The maximum output voltage and current are the same as for 4 pole interferential operation Two channels of output are available with independent intensity control Russian stimulation 1 cycle of carrier frequency 2 5 kHz 7 1 cycle of burst frequency 3 gt On Time Off Time The burst frequency may be set to be from 1 Hz to 100 Hz The on and off times are always equal and are from 0 5s 1 Hz burst to 5 ms 100 Hz burst The maximum output voltage and current are the sam
4. 20 min Once muscle contraction has just been detected press Next The first point of the S D curve will be plotted and the pulse width will decrement to the next width setting It will now be necessary to 34 Interferential 960 Multidyne 970 increase the output intensity until muscle contraction occurs again at this point press Next and the next point in the S D curve will be plotted Repeat this process until the End pulse width is reached The S D curve is now plotted Waiting for or pressing Stop or manually reducing the output to zero will cause the Rheobase and Chronaxie to be calculated and displayed S b Curve Rheohase isu Chronaxie 1 b6ms Pressing OK will return to the S D curve set up screen to allow another test to be run Pressing Menu at this point will return to the main System Menu screen Interferential 960 Multidyne 970 35 Electrode error detection Interferential 4 pole When a constant current output is chosen and the unit is operating in 4 or 2 pole interferential russian diadynamic sinusoidal galvanic or tr bert modes the electrode impedance is monitored to ensure that adequate electrode contact is maintained If the unit detects an electrode impedance too high to safely deliver the required current then the output of the Interferential 960 Multidyne 970 is terminated an error message is displayed on the bottom line of the LCD and an intermittent alarm is sounded To cancel the alarm and clear
5. 70mA peak 10 into 500 Q CV 0 140V peak 10 into 2k Q Interrupted galvanic Multidyne 970 only Pulse width 10 us to 1 s 5 for rectangular in 1 2 5 sequence 1msto1s 5 for other shapes Waveform Rectangular Triangular or Trapezoidal Pulse rate 1 to 30 minute 10 Output type CC 0 70mA peak 10 into 500 Q CV 0 140V peak 10 into 2k Q 62 Interferential 960 Multidyne 970 Tr bert Multidyne 970 only Waveform 2 ms on 5 5ms off 5 rectangular Output type CC 0 70mA peak 10 into 500 Q CV 0 140V peak 10 into 2 k Q Medi Wave Waveform 6 ms 5 differentiated pulse Frequency 2 60 Hz 5 Output type CC 0 50mA peak 10 into 500 Q CV 0 60V peak 10 into 2k Q Microcurrent Multidyne 970 only Waveform Square wave 50 duty cycle Frequency 1 1000Hz Output type CC 0 1mA 20 Polarity Positive Negative or Auto reverse Interferential 960 Multidyne 970 63 64 Interferential 960 Multidyne 970 EMS Physio Ltd Grove Technology Park Downsview Road Wantage Oxfordshire OX12 9FE UK T 01235 772272 F 01235 763518 E sales emsphysio co uk Website http www emsphysio co uk Interferential 960 Multidyne 970 65
6. beeper volume high or low Language allows you to change the display language to any that are installed in the unit and Key click allows you to turn on or off the beep that happens whenever the screen is touched Touching the About button displays the model name and the installed firmware version 18 Interferential 960 Multidyne 970 User programs The Interferential 960 Multidyne 970 can store up to 10 user defined set ups Touch the User button or the User Programs button in the System Menu screen to go to this screen User Programs IT 4 pole The LCD shows the 10 user programs as file cards with numbered tabs To select a program card just touch its tab To load a program press Load The settings shown on the file card will be loaded and the user will be returned to the set up screen If an empty card is selected the unit will give a short beep and no action will be taken To save the current set up as a user program select the card to which the set up is to be saved by touching its tab and press Save The settings will be saved and displayed on the selected card To erase a program saved on the current card press Erase Not Used will be displayed on the selected card to confirm the action Select the Quit option to return to the System Menu page Interferential 960 Multidyne 970 19 Standard user interface functions Throughout the operation of the Interferential 960 Multidyne 970 the various modes and param
7. in the stimulator output Consideration must be given to the current densities for any electrode used with the Multidyne 970 Unit Current densities greater than 2 mA rms cm2 are not recommended because of the risk of burning All the standard EMS conductive rubber electrodes may be used up to the maximum output of the unit without exceeding this figure When using other electrodes the maximum safe output current should be assessed before use First estimate the effective contact area of the electrode in square cm and then apply the following formula rms output current mA Area of electrode cm x 2 The ratio of the rms to the peak current for the different operating modes is given in the technical specification section of this manual The output indication on the LCD shows the peak output voltage or the peak output current in mA depending upon the selected mode of operation When using direct current extreme care must be taken to ensure the patient s safety from electrochemical burning In particular care must be taken to avoid uneven pressure on the electrodes causing high local Interferential 960 Multidyne 970 7 current density Electrodes must not be applied where there are cuts or abrasions Contraindications Acute sepsis due to the risk of spreading infection Tumours due to the risk of increased growth or metastatic activity Pregnancy do not treat the lower abdomen back or pelvis Menstruation do not treat l
8. in which the pulse width may be set from 20 to 400 ys in 5 us increments by pressing the numerical digits and then pressing OK Interferential 960 Multidyne 970 25 Frequency pressing this button opens a new window TENS Aa mA Frequency Hz gc 0 5 The pulse frequency may be set from 1 to 250 Hz in 1 Hz increments by pressing the numerical digits and then pressing OK Mode control The TENS output may be continuous burst or surged Each modulation type is selected by pressing the Mode button CC CV The output may be set to be constant current CC or constant voltage CV by pressing the CC CV button 26 Interferential 960 Multidyne 970 Diadynamic set up Multidyne 970 only Diadynamic A ima E E m cc Polarity Pos 3 Treatment time is set as already described Type The diadynamic waveform may be selected by pressing the Type button The full range of diadynamic waveforms is available DF diaphas fixe MF monophas fixe CP module en courtes p riodes Cpiso modul en courtes p riodes isodynamique RS rythme syncop and LP modul en longues p riodes Full details of these waveforms are given in the technical specification section of this manual Polarity This reverses the polarity of the waveforms see technical spec It is particularly used in combination therapy where the ultrasound head becomes one electrode and this switch will change the polarity of the stimulator
9. negative or auto reverse half way through the treatment time electrical polarity Two channels of output are available with independent intensity control Interrupted galvanfc Rectangular Interrupted galvanic ge amma standard pulse shapes Triangular MA Na Trapezoidal Pulse Width Rectangular pulses are available from 10 us to 1 s pulse width and triangular and trapezoidal pulses from 1 ms to 1s The pulse repetition rate is from 2 to 30 pulses per minute Two channels of output are available with independent intensity control and their polarity may be selected as Pos Neg or autorev half way through the treatment time Interferential 960 Multidyne 970 53 Tr bert This mode produces a continuous train of 2ms pulses with a 5 ms interval between each pulse The pulse repetition rate is therefore approximately 143 Hz Two channels of output are available with independent intensity control Pos Neg or autorev polarities are selectable Medi Wave The Medi Wave output is a train of differentiated pulses with a pulse width of 6 ms In burst mode the burst rate is 2 Hz for pulse freguencies greater than 20 Hz KERE l and the pulse frequency divided E ME by 10 for frequencies less than 20 Hz The duty cycle of the burst is 50 In surge mode the surge rate is 10 per minute Two channels of output are available with independent intensity control 54 Interferential 960 Multidyne 970 Gm
10. occurs half way through the selected treatment time When running the output state is represented by a graphic in the top right corner of the display Interrupted Galvanic 31U Rate 30min Hidth Polarit is Pos TREATMENT CC CV The output may be set to be constant current CC or constant voltage CV Interferential 960 Multidyne 970 31 Tr bert set up Multidyne 970 only The available options are treatment time polarity and CC CV These are set in exactly the same way as in the other operating modes Medi Wave set up Me di Have Freq pressing this button opens this window Me di Have A BmA AAA Frequency Hz 04 8 The frequency may be set from 2 to 60 Hz in 1Hz increments 32 Interferential 960 Multidyne 970 Mode Normally Medi Wave stimulation is used in continuous mode that is with no modulation Cont In addition burst and surged modes are also available In burst mode the burst rate is 2 Hz for pulse frequencies greater than 20 Hz and the pulse frequency divided by 10 for frequencies less than 20 Hz The duty cycle of the burst is 50 In surge mode the surge rate is 10 per minute CC CV The output may be set to be constant current CC or constant voltage CV Microcurrent set up Multidyne 970 only Microcurrent A BmA E E m cc Frequency Polarity 130Hz Pos 3 Freq The frequency may be set from 1Hz to 1000Hz in ascending jumps by
11. the error message press any button or turn the rotary control anticlockwise The remaining treatment time is maintained Check the electrodes and leads before continuing treatment If rubber pad electrodes and sponge covers are being used check that they are held securely with even pressure by the elasticated bandages and that the sponges have not dried out 36 Interferential 960 Multidyne 970 Treatment Connect the patient lead to the output socket of the unit Attach suitable electrodes to the patient and connect the patient lead to the electrode using the blue and yellow cables provided The yellow cables are channel A and the blue cables channel B For stimulation modes that have a dc component the number 1 lead is positive and the number 2 lead negative Check that all the unit settings are as required for the chosen type of stimulation Slowly turn the rotary control clockwise whilst pressing and holding the relevant Output Channel button right hand side of screen to increase the output level If the treatment time is zero the unit will give a short alarm to indicate that the output cannot be energised If the treatment time is not zero the output of the stimulator will be energised the output symbol will flash and the treatment time will begin to count down Advance the output control slowly until the desired effect of the stimulation is produced 4 pole interferential does not have independent output channels Always adv
12. 0 Multidyne 970 Controls and markings Interferential 960 Multidyne 970 front panel IEC Symbol 348 Attention consult accompanying documents Stimulator Output IEC symbol 878 01 37 Output IEC symbol 878 02 03 Type BF Equipment IEC symbol 7000 1641 Instructions for use Interferential 960 Multidyne 970 11 Multidyne 960 underside Model 970 is identical Serial number IEC symbol 7000 1641 Name and and date of Instructions for use Address of manufacture Manufacturer Do not dispose of as unsorted waste 2006 96 EC WEEE Directive MAD A mperaydre 10 to 40 C Px umidty 5 to 95 Made in the UK gfnaric pressure 500 to 1060hPa Model number and classification Stimulation output levels IEC symbol 348 Attention consult accompanying documents 12 Interferential 960 Multidyne 970 Multidyne 970 top The Interferential 960 is identical except for the model label LCD touch panel On Off button Primo IEC symbol 848 01 26 variability in steps Output control knob Interferential 960 Multidyne 970 13 Patient Lead PMA3055 Electrode connecting A cables 14 Interferential 960 Multidyne 970 Installation Upon receipt check for any visible damage which may have occurred in transit If any signs of damage are found then retain all packing material and inform the carrier a
13. Positive negative or auto reverse Output channels 2 Sinusoidal 970 only Frequency AMF 50 Hz Surge rate 2 to 30 minute Surge pattern Rectangular triangular or trapezoidal Output type CC 0 70mA peak CV 0 140V peak Output channels 2 Faradic 970 only Frequency 50 Hz Surge rate 2 to 30 minute Surge pattern Rectangular triangular or trapezoidal Output type CC 0 70mA peak CV 0 140V peak Output channels 2 Interferential 960 Multidyne 970 45 Galvanic 970 only Output type Polarity Output channels Interrupted galvanic 970 only Pulse width Waveform Pulse rate Output type Polarity Output channels Tr bert 970 only Waveform Output type Polarity Output channels Medi Wave 960 amp 970 Waveform Frequency Modulation Output type Output channels Microcurrent 970 only Waveform Frequency Output type Polarity Output channels 46 CC 0 70mA peak CV 0 140V peak Positive negative or auto reverse 2 10 us to 1 s for rectangular 1 ms to 1 s for other shapes Rectangular triangular or trapezoidal 1 to 30 minute CC 0 70mA peak CV 0 140V peak Positive negative or auto reverse 2 2 ms on 5ms off rectangular CC 0 70mA peak CV 0 140V peak Positive negative or auto reverse 2 6 ms differentiated pulse 2 60 Hz None burst surged CC 0 50mA peak CV 0 60V peak 2 Square wave 50 duty cycle 1 1000Hz CC 0 1mA Positive negative or auto reverse 2
14. The Base and Peak frequencies may be set in 1 Hz increments from 0 to 250 Hz Press OK when the desired frequencies have been chosen to return to the 4 pole Interferential set up screen Interferential 960 Multidyne 970 21 Pattern The pattern determines the rate at which the beat frequency sweeps between the base and peak frequencies Three patterns are available The 1 1 pattern gives 1 second at the base frequency followed by 1 second at the peak frequency The 6 6 pattern gives 5 seconds at the base frequency sweeps linearly to the peak frequency in 1 second followed by 5 seconds at the peak frequency and finally sweeps back to the base frequency in 1 second The 6 6 pattern sweeps from the base to the peak frequency in 6 seconds and then sweeps back to the base frequency in 6 seconds To change the pattern press the Pattern button Vector When the vector option is set to off output channels A and B deliver the same output level current or voltage When the vector option is on the relative amplitude of the outputs is slowly varied Over 5 seconds the output of channel A will increase smoothly from 80 of its nominal amplitude to 100 while the output of channel B falls from 100 to 80 During the next 5 seconds A will return to 80 and B will rise to 100 and so on The effect is to move the physical location of the point of maximum stimulation in the tissue and therefore increase the treatment area To change the vector
15. User Manual INTERFERENTIAL 960 MULTIDYNE 970 Model 122 123 Interferential 960 Multidyne 970 Contents Contents General information Record of amendments Declaration of conformity to 93 42 EEC Warranty Introduction and indications for use Contraindications Accessories Controls and markings Installation Operating instructions Maintenance Appendix A overview of treatment modality Appendix B technical specification Appendix C EMC Tables Appendix D essential performance Interferential 960 Multidyne 970 Page 41 42 44 56 60 General information This manual provides the necessary information for the installation and operation of the Interferential 960 and Multidyne 970 Units These instructions must be studied before putting the unit into operation The information contained in this manual is subject to change without notice No part of this manual may be photocopied reproduced or translated into another language without the prior written consent of EMS Physio Ltd The Interferential 960 is an interferential electrotherapy unit The Multidyne 970 unit is a multiple waveform electrotherapy unit The 970 provides a complete range of low and medium frequency waveforms for electrotherapy and electro diagnostics It is intended that the Multidyne 970 unit is only used by qualified healthcare professionals such as physiotherapists who have received training in electrotherapy Record o
16. ance the output control slowly During the last 5 seconds of any treatment both outputs are smoothly reduced to zero During any treatment a Stop button appears in the bottom right hand corner of the screen Interferential 2 pole Carrier AMPFCHz gt 4kHz 188 Pattern Vector 66 Off TREATMENT Pressing this causes both outputs to reduce smoothly to zero over a period of 5 seconds Interferential 960 Multidyne 970 37 Interferential 2 pole Carrier AMPFCHz gt 4kHz Lag Pattern Vector 66 Off STOPPING In 4 pole and 2 pole interferential modes the instantaneous frequency AMF is displayed Note In soft water areas it may be necessary to add a small amount of bicarbonate of soda to the water used to wet the sponges in order to achieve adequate contact When the treatment time reaches zero a three second alarm is sounded From any of the set up screens pressing the menu key when the output is off returns to the system menu 38 Interferential 960 Multidyne 970 Protocols 4 Pole interferential mode only Pressing the Protocols button 960 or the Prot in the 4 Pole interferential mode set up screen 970 will call up a list of pre sets tailored for treating various conditions Protocols Stimulation Pain relief ra 1 of 13 The condition to be treated can be selected using the up down buttons and then pressing select to call up the treatment settings for that particular condit
17. dips short interruptions and voltage variations on power supply input lines IEC 61000 4 11 Power frequency 50 60 Hz Magnetic field IEC 61000 4 8 IEC 60601 test level 6 kV contact 8 kV air 2 kV for power supply lines 1 kV for input output lines 1 kV differential mode 2 kV common mode lt 5 UT gt 95 dip in UT For 0 5 cycle 40 UT 60 dip in UT For 5 cycles 70 UT 30 dip in UT For 25 cycles lt 5 UT gt 95 dip in UT For 5 sec 3 A m Compliance level 6 kV contact 8 kV air 2 kV for power supply lines 1 kV for input output lines 1 kV differential mode 2 kV common mode lt 5 UT gt 95 dip in UT For 0 5 cycle 40 UT 60 dip in UT For 5 cycles 70 UT 30 dip in UT For 25 cycles lt 5 UT gt 95 dip in UT For 5 sec 3 A m Electromagnetic environment guidance Floors should be wood concrete or ceramic tile If floors are covered with synthetic material the relative humidity should be at least 30 Mains power quality should be that of a typical commercial or hospital environment Mains power quality should be that of a typical commercial or hospital environment Mains power quality should be that of a typical commercial or hospital environment If the user of the 960 970 requires continued operation during power mains interruptions it is recommended that the 960 970 be powered from an uninterruptible po
18. e as for 4 pole interferential operation Two channels of output are available with independent intensity control 48 Interferential 960 Multidyne 970 TENS Three TENS waveforms are available Asymmetrical Waveform Symmetrical Waveform 2 Seguential Waveform Pulse Width 20 400 ys M I i a Pulse Period E pulse period 1 repetition rate TENS burst mode For repetition rates greater than 20 Hz the TENS output is on for 0 25 s and off for 0 25 s 2 Hz burst frequency For repetition rates less than 20 Hz the on and off times are 5 pulse periods TENS surge Mode For repetition rates greater than 5 Hz the TENS output is zero for 2 s rest then increases to the set level during the next 1 s rise remains at the set level for 0 5 s hold and returns to zero during the next 0 5 s fall giving a surge rate of 15 minute Below 5 Hz the rest rise hold and fall times are 10 5 3 and 2 pulse periods respectively Two channels of output are available with independent intensity control Interferential 960 Multidyne 970 49 Diadynamic In diadynamic mode the unit produces six different waveforms The maximum peak output current is limited to 70 mA DF diaphas fixe The DF waveform is a continuous full wave rectified 50 Hz sinewave 10ms rms current peak current x 0 707 The maximum rms current is 50 mA MF monophas fixe The MF waveform is a continuous half wave rectified 50 Hz sine
19. e of battery has a limited life typically 500 charge discharge cycles This battery must only be replaced by authorised service personnel Do not mutilate puncture or dispose of batteries in fire The batteries can burst or explode releasing hazardous chemicals Discard used batteries according to the manufacturer s instructions and in accordance with your local regulations There are no user serviceable parts inside the unit and it should not be opened Full servicing instructions are available on request Interferential 960 Multidyne 970 41 Appendix A overview of treatment modality Electrotherapy Low frequency stimulation Diadynamic currents were introduced by Dr Pierre Bernard They are various combinations of half and full wave rectified 50 Hz sinewaves Their therapeutic benefits include pain relief reduction of swelling and inflammation increased local circulation muscle strengthening and re education The Multidyne 970 produces DF diphas fixe MF monophas fixe CP courtes p riodes CPiso courtes p riodes isodynamique LP longues p riodes and RS rhythme syncope waveforms Surged 50 Hz sinusoidal currents may be used to produce rhythmical muscle contraction This can help in the reduction of oedema and produce an increase in circulation in the treated area Faradic pulses are of short duration less than 1 ms and have a repetition rate of 50 Hz They are normally surged to produce rhythmical musc
20. essing the Surge button Rate Surge rates of 2 5 10 20 and 30 per minute are available The surge rate may be changed by pressing the rate button When running the surge status is shown in the top right corner of the display Faradic r A TREATMENT CC CV The output may be set to be constant current CC or constant voltage CV by pressing the CC CV button Interferential 960 Multidyne 970 29 Galvanic set up Multidyne 970 only Galvanic a ima E E mA cc 19 57 Polarity Pos t Treatment time is set as described above Polarity Pressing this button changes the electrical polarity of the galvanic current Pos Neg or Autorev half way through the selected treatment time CC CV The output may be set to be constant current CC or constant voltage CV 30 Interferential 960 Multidyne 970 Interrupted galvanic set up Multidyne 970 only Interrupted Galvanic Treatment time is set as described before Form Three different pulse shapes are available Rectangular Triangular and Trapezoidal A full description of these waveforms is available in the technical specification section of this manual Width The pulse width may be set from 1ms to 1s for all waveforms with additional narrower pulses for rectangular only Rate Pulse rates of 2 5 10 20 and 30 per minute are available Polarity Positive going negative going or auto reverse polarities are available auto reverse
21. eter settings are all accessed and changed by pressing the graphic buttons on the LCD touchscreen The rotary control is used to increase and decrease the stimulation intensity In 4 pole interferential mode it controls the overall stimulation intensity in all other stimulation modes it is possible to independently control the levels of channels A and B by pressing and holding the relevant selection button The menu button is used to exit from the current screen or to select the menu option highlighted 20 Interferential 960 Multidyne 970 The following describes the set up pages for each stimulation type when accessed by pressing the relevant button in the System Menu screen 4 pole interferential set up Interferential 4 pole Treatment time Is selected either by touching the digits of the time display or by pressing the clock symbol and entering the desired treatment time The time can be set in 30s intervals Carrier Pressing this button selects 4 8 or 2 kHz carrier frequency AMF Pressing this button opens the AMF window Interferential 4 pole gt MP CH e 040 Lox 210 The amplitude modulation frequency AMF or beat frequency is set as a Base and Peak beat frequency The beat frequency sweeps between the base and the peak frequency at a rate determined by the setting of the Pattern button If the base and peak frequencies are set to the same value then a constant beat frequency is produced
22. f amendments ISSUE COMMENTS DATE 1 Initial Issue 09 09 11 2 Updated to show latest images 24 10 12 3 Declaration of conformity revised 26 06 14 4 Interferential 960 Multidyne 970 EC Declaration of Conformity Product Name Primo Interferential 960 Multidyne 970 Model Number 122 123 EMS Physio Ltd Grove Technology Park Downsview Road Wantage Oxfordshire OX12 9FE United Kingdom Declares that the device listed above is in conformity with the essential requirements and provisions of the following EC Council Directives Directive Conformity assessment route 2011 65 EU Annex II module A 768 2008 EC RoHS 93 42 EEC Annex II of Directive 93 42 EEC under the supervision of Notified Body Number 0120 SGS United Kingdom Ltd Class Ilb according to Annex IX of 93 42 EEC FS po Signature j M Bowles Position Operations Director Date 26 June 2014 Date first issued 9 September 2011 Interferential 960 Multidyne 970 Warranty This EMS Physio Ltd hereinafter called the Company product is warranted against defects in materials and workmanship for a period of two years from the date of shipment The Company will at its option repair or replace components which prove to be defective during the warranty period provided that the repairs or replacements are carried out by the Company or its approved agents The Company will consider itself responsible for the effects on safety reliability and performance of the product
23. f skin impedance At 50 Hz faradic current the impedance for a 100 cm of skin is approximately 3000 ohms At 4000 Hz medium frequency the skin impedance of the same area is around 50 ohms This means that a much lower voltage signal can be used to produce the desired current resulting in less skin sensation and a more comfortable treatment This medium frequency is however well outside of the normal biological frequency range 0 1 to 250 Hz In order to produce the required stimulation two medium frequencies are used A constant frequency of say 4000 Hz is applied to one pair of electrodes and a slightly different frequency of say 3900 Hz is applied to the other pair These two frequencies interfere to produce an amplitude modulated medium frequency beat frequency in the tissue The tissue responds to the cyclic rise and fall in the current intensity It is the amplitude modulation frequency AMF that is within the normal biological frequency range and not the medium frequency carrier Russian stimulation was developed by Dr Y Kotz and uses 2 5 kHz sinewaves pulse at a low frequency typically 30 to 80 Hz to produce comfortable muscle contraction It is similar to a surged 2 pole interferential waveform Transcutaneous electrical nerve stimulation TENS refers to the application of low intensity short duration pulses for the purpose of relieving pain The Multidyne 970 provides two channels of asymmetric symmetric or sequentia
24. ion Interferential 960 Multidyne 970 39 Electrodes It is recommended that only electrodes supplied by EMS Physio Ltd are used with the Interferential 960 Multidyne 970 Three sizes of conductive rubber electrodes are available These are small 70 x 50 mm medium 100 x 70 mm or large 130 x 100 mm Replacement sponge covers are available for each electrode In most applications it is sensible to use as large an electrode as is practical for the area of the body being treated This will also reduce the possibility of any adverse effects at the site of the electrode due to high current density Inspect the area to be treated to ensure there are no open wounds areas of infection abrasions etc Wash the skin in warm soapy water to minimise skin impedance and remove any creams or gels that may have been used Explain to the patient what is being done and what is going to happen Soak the sponge electrode covers in warm water In a soft water area it may be necessary to add a small amount of bicarbonate of soda to the water to ensure low contact impedance for the electrodes Fit the rubber electrodes fully into the sponge covers Apply the electrodes to the patient using the elasticated bandages supplied The bandages must cover the whole of the electrode and maintain an even pressure in order to achieve a uniform current flow A piece of polythene may be used between the top surface of the sponge cover and the elasticated bandage to
25. l output with a wide range of pulse widths and repetition rates Interferential 960 Multidyne 970 43 Appendix B technical specifications General Power input 18V 3 33A external PSU Battery pack optional Internal rechargeable NiMh Classification EN60601 1 Class 1 Type BF Fuse Internal T3 15A Size height x width x depth 90 x 290 x 230 mm Weight 1 3 kg excluding battery Treatment programs 10 user defined set ups Interferential 4 pole 960 amp 970 Carrier frequency 2 kHz 4 kHz or 8 kHz AMF 0 250 Hz in 1 Hz increments Swing pattern 1 1 6 6 or 6 6 Vector 10s 20 both channels Output type CC 0 100mA peak CV 0 70V peak Output channels 2 Interferential 2 pole 960 amp 970 Carrier frequency 2 kHz 4 kHz or 8 kHz AMF 0 250 Hz in 1 Hz increments Swing pattern 1 1 6 6 or 6 6 Output type CC 0 100mA peak CV 0 70V peak Output channels 2 Russian stimulation 970 only Carrier frequency 2 5 kHz Modulation frequency 1 100 Hz Surges 1 1 to 1 5 Output type CC 0 100mA peak CV 0 70V peak Output channels 2 44 Interferential 960 Multidyne 970 TENS 970 only Waveform Asymmetrical symmetrical or sequential Pulse width 20 400 us Repetition rate 1 250 Hz Modulation None burst or surged Output type CC 0 100mA peak CV 0 60V peak Output channels 2 Diadynamic currents 970 only Current types DF MF CP CPiso RS LP Output type CC 0 70mA peak CV 0 140V peak Polarity
26. le contraction Galvanic or direct current is used for pain relief and iontophoresis The Multidyne 970 produces a wide range of interrupted galvanic pulses Rectangular pulses from 10us to 1s are available and other shapes from 1 ms to 1s Trabert s current sometimes known as ultra reiz has a fixed pulse width of 2 ms and a period of 7 ms and is used for pain relief The Medi Wave signal is a bipolar exponential decaying wave which emulates the H waveform found in nerve signals Hoffman reflex At low repetition frequencies 2 Hz Medi Wave offers profound muscle stimulation and at higher frequencies 60 Hz deep analgesic pain control 42 Interferential 960 Multidyne 970 Medium frequency stimulation Interferential therapy employs medium frequency currents used in 2 or 4 pole configurations to produce a low frequency stimulation effect Prior to the introduction of interferential therapy in the mid 1950s low frequency stimulation was used for pain relief muscle re education etc These currents however have the disadvantage that normal human skin has a relatively high impedance at such frequencies In order to overcome the skin impedance a larger voltage has to be used to achieve the desired current resulting in a more uncomfortable treatment for the patient In addition the penetration depth of these currents is poor and in part is limited by the discomfort to the patient Interferential therapy overcomes the problem o
27. mo trolley NC3052A 4 small sponge electrode covers for NC3052B NC3052B 4 small 70 x 50 mm conductive rubber electrodes NC3054A 4 large sponge electrode covers for NC3054B NC3054B 4 large 130 x 100 mm conductive rubber electrodes NC3041 Electrode handle for circular pad amp ball electrodes NC3042A Connecting cable for electrode handle NC3046 Circular pad electrode 12 mm diameter NC3048 Circular pad electrode 37 mm diameter NC311A Ball electrode for muscle testing DU1 Stretch bandage 600 x 75 mm DU4 Stretch bandage 600 x 50 mm A range of single patient self adhesive electrodes is available Catalogue Description Number RB410 33 x 54 mm pack of 4 RB430 50 x 50 mm pack of 4 RB440 80 x 100 mm pack of 2 RB450 25 mm diameter round pack of 4 Interferential 960 Multidyne 970 Supplied with each unit is a detachable mains lead suitable for the country to which it is delivered Replacement or additional mains leads are shown below EMS Part Description Number 6 85 UK mains lead 6 112 European mains lead 6 119 North America mains lead For other countries contact EMS Physio Ltd or the agent from whom the unit was purchased EMS Physio Ltd Grove Technology Park Downsview Road Wantage Oxfordshire OX12 9FE England T 01235 772272 F 01235 763518 E sales emsphysio co uk Website http www emsphysio co uk 10 Interferential 96
28. nces are controlled The customer or user of the 960 970 can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment transmitters and the 960 970 as recommended below according to the maximum output power of the communications equipment 150kHz to 80MHz 80MHzto 800MHz 800MHz to 2 5GHz d 3 5VP V d 3 5 P E d 7WP E 0 01 0 12 0 12 0 23 0 1 0 38 0 38 0 73 1 1 2 1 2 2 3 10 3 8 3 8 7 3 100 12 12 23 For transmitters rated at a maximum output power not listed above the recommended separation distance d in meters m can be estimated using the equation applicable to the frequency of the transmitter where P is the maximum output power rating in watts W according to the transmitter manufacturer NOTE 1 At 80MHz and 800MHz the separation distance for the higher frequency range applies NOTE 2 These guidelines may not apply in all situations Electromagnetic propagation is affected by absorption and reflection from structures objects and people 60 Interferential 960 Multidyne 970 Appendix D Essential performance The performance characteristics essential to the correct operation of the Interferential 960 and Multidyne 970 are Power input 100 240V ac Treatment time 0 30 minutes Interferential 4 pole Carrier freguency 2 kHz 4 kHz or 8 kHz 5 AMF 0 250 Hz in 1 Hz increments 2 Swing pattern 1 1 6 6 or 6 6 Output type CC 0 100mA
29. nd the Company or its agent from whom the unit was purchased The Interferential 960 Multidyne 970 must only be used with an EMS SLA9000 power supply as supplied with the unit Units fitted with an internal rechargeable battery may be used powered by the battery only The Interferential 960 Multidyne 970 unit is supplied with four medium sized electrotherapy electrodes with their associated patient lead Plug the patient lead into the socket on the front of the unit and connect the electrodes to the yellow and blue cables The plug has an arrow and the word top embossed on it to aid correct orientation Operation of the unit in close proximity less than 1 metre to shortwave therapy equipment or radio frequency mobile communication equipment could result in the output of the Interferential 960 Multidyne 970 being affected Interferential 960 Multidyne 970 15 Operating instructions Power on sequence and general information When the Interferential 960 Multidyne 970 is turned on the EMS company logo is displayed on the LCD along with the company web address the model name and the firmware version 6 EMS Physio Ltd WWW emnsphysio co uk Multidyne 276 Firmware Version 1 001 662 The unit will then give a short beep and display the System Menu screen Interferential 960 System Menu Interferential 4 pole Interferential pole Medi Have User Programs Protocols System Set up Multidyne 970 Sy
30. only if assembly operations re adjustments modifications or repairs are carried out by persons authorised by it only if the product is used in accordance with the instructions for use only if the electrical installation of the relevant room complies with the appropriate national requirements Should the product be returned to the Company for repair it must be sent carriage paid Consumable items for example electrodes electrode covers and batteries are excluded from the above warranty 6 Interferential 960 Multidyne 970 Introduction The Interferential 960 provides 4 pole and 2 pole Interferential electrotherapy only The Multidyne 970 provides a complete range of low and medium frequency waveforms including Interferential for electrotherapy and electro diagnostics Indications for use Therapeutic voltage and current waveforms may be applied to a wide range of conditions with successful outcomes These include acute and subacute traumatic and inflammatory conditions chronic rheumatoid and arthritic conditions and for pain relief Precautions The therapist must be aware of the following precautions and potential hazards Simultaneous connection of a patient to high frequency surgical equipment may result in burns at the site of the stimulator electrodes and possible damage to the stimulator itself Operation in close proximity less than 1 metre to shortwave or microwave therapy equipment may produce instability
31. option press the vector button CC CV The output from the unit may be set to be constant current CC or constant voltage CV in nature In constant current mode the electrode impedance is monitored and if the impedance for either channel is too high then the output is terminated and an alarm sounded In constant voltage mode if the electrode impedance rises then the output is automatically reduced Normally constant current mode would be used If the unit is used for combination therapy or with internal electrodes vaginal or anal then constant voltage is recommended Protocols The Prot button interferential mode only gives access to a range of pre set parameter settings aimed at treating various listed conditions these are explained in more detail later in this manual 22 Interferential 960 Multidyne 970 2 pole interferential set up Interferential 2 pole Carrier AMEFCHzZ gt 4kHz 100 1008 Pattern Vector 66 Off 2 pole interferential therapy is similar to 4 pole interferential except that the two medium frequencies are added together in the stimulator itself and applied to the treatment site through a single pair of electrodes The 2 pole interferential set up is similar to the 4 pole set up The treatment time carrier frequency base and peak frequencies pattern and CC CV operation are set up in exactly the same way Two channels are available with independent intensity control corresponding to electrode pairs A
32. ower back or aodomen due to risk of increased bleeding or pain Cardiac conditions do not treat the chest area or near the cervical ganglion Cardiac pacemakers especially demand type or any other implanted electronic device unless specialist medical opinion has first been obtained Febrile conditions Large open wounds in treatment area Dermatological conditions in treatment area Thrombosis Hypersensitivity or fear of electrical treatments Any patient who cannot understand the nature of the treatment for example young children very old or senile patients who cannot report back adeguately or understand the potential dangers This may apply egually to persons who do not speak the same language as the therapist Severe hypotension hypertension do not treat in the region of the lower cervical spine If in doubt the patient s physician should be consulted Electrodes should never be placed so that the applied current crosses the chest 8 Interferential 960 Multidyne 970 Accessories supplied as standard Catalogue Description Number SLA9000 DC Power supply 18V 60W PMA3055 Patient lead 4 way yellow and blue connecting cables included NC3053A 4 medium sponge electrode covers for NC3053B NC3053B 4 medium 100 x 70 mm conductive rubber electrodes DU2 2 Stretch bandages 1200 x 75 mm Optional accessories EMS530 Primo shoulder bag EMS158 Pri
33. peak 10 into 500 Q CV 0 70V peak 10 into 2 k Q Interferential 2 pole Carrier frequency 2 kHz 4 kHz or 8 kHz 5 AMF 0 250 Hz in 1 Hz increments 2 Swing pattern 1 1 6 6 or 6 6 Output type CC 0 100mA peak 10 into 500 Q CV 0 70V peak 10 into 2 k Q Russian stimulation Multidyne 970 only Carrier frequency 2 5 kHz 5 Modulation frequency 1 100 Hz 5 Surges 1 1 to 1 5 Output type CC 0 100mA peak 10 into 500 Q CV 0 70V peak 10 into 2k Q Interferential 960 Multidyne 970 61 TENS Multidyne 970 only Waveform Asymmetrical Symmetrical or Seguential Pulse width 20 400 us in 5 us increments 10 Repetition rate 1 250 Hz in 1 Hz increments 10 Output type CC 0 100mA peak 10 into 500 Q CV 0 60V peak 10 into 2k Q Diadynamic currents Multidyne 970 only Current types DF MF CP CPiso RS LP Output type CC 0 70mA peak 10 into 500 Q CV 0 140V peak 10 into 2k Q Sinusoidal Multidyne 970 only Frequency AMF 50 Hz 5 Surge rate 2 to 30 minute 10 Surge pattern Rectangular Triangular or Trapezoidal Output type CC 0 50mA peak 10 into 500 Q CV 0 100V peak 10 into 2k Q Faradic Multidyne 970 only Frequency 50 Hz 5 Surge rate 2 to 30 minute 10 Surge pattern Rectangular Triangular or Trapezoidal Output type CC 0 50mA peak 10 into 500 Q CV 0 100V peak 10 into 2 k Q Galvanic Multidyne 970 only Output type CC 0
34. prevent the bandage becoming wet Connect the electrodes to the stimulator output with the cables provided For DC applications the yellow lead is positive and the blue negative Itis important to ensure that the patient feels the expected sensation in the required area during treatment otherwise the electrodes should be relocated The electrodes must never be placed so that the stimulating current crosses the chest or passes near the heart Re useable electrodes should be cleaned and disinfected between patients A full range of self adhesive electrodes is also available see technical specification section 40 Interferential 960 Multidyne 970 Maintenance The electrodes and covers may be disinfected using a 70 v v aqueous solution of isopropyl alcohol They are NOT suitable for steam sterilisation or for disinfectants containing sodium hypochlorite N B Isopropyl alcohol is flammable and should be kept away from naked flames Isopropyl alcohol must not be brought into contact with eyes or mouth The unit may be cleaned by wiping over with a damp cloth The use of abrasive materials and cleaning solvents should be avoided Regularly at least monthly inspect all treatment leads cables and connectors for signs of damage The Interferential 960 Multidyne 970 has the option of an internal NiMh rechargeable battery Whenever the unit is connected to the power supply the battery is monitored and charged as necessary This typ
35. repeated presses of this button Polarity This may be Pos Neg or Autorev half way through the selected treatment time CC CV The output may be set to be constant current CC or constant voltage CV Interferential 960 Multidyne 970 33 S D curve 970 only This mode generates rectangular interrupted galvanic pulses for plotting strength duration curves Output is from channel A at constant voltage only Pressing the S D Curve button in the System Menu screen produces this screen ET Curve 00 00 Start End Sims 160ps The start pulse width may be adjusted from 100ms to 1s by repeatedly pressing the Start button and the end pulse width from 10us to 1ms by repeatedly pressing the End button This defines the range of measurements and thus the start and end points of the S D graph Sufficient time must be entered to complete the S D test 10minutes should be more than adequate With the correct electrodes ball muscle testing electrode and large dispersive pad electrode in place over the muscle to be tested slowly increase the output until a muscle contraction is detected The screen will be showing a flashing Treatment sign and the axes of the S D graph will be displayed 5D Curve gt Am 17U cu 40 yu a 6 1 logi Hs TREATMENT E E The graphic in the top right hand corner of the screen displays the pulse width and the progress bar shows when the pulse occurs Pulse repetition rate is fixed at
36. rse this Neg so that the above waveforms would be rendered upside down both channels are inverted A third option is Auto reverse in which the polarity automatically reverses half way through the selected treatment time Interferential 960 Multidyne 970 51 Sinusoidal In sinusoidal mode the output is an amplitude modulated medium frequency 4 kHz with 50 Hz sinusoidal beat frequency The amplitude is determined by the output level setting and the surge type and rate The maximum output is 140 V or 70 mA peak For a sine wave the peak output or amplitude is equal to the rms output multiplied by V2 or conversely rms Rest Rise Hold al output i peak Peak i output x Voltage i 0 707 Time Three standard surge patterns are provided The rest rise hold and fall times for each pattern as a percentage of the complete surge cycle are shown below Pattern Rest Rise Hold Fall Rectangular 50 5 40 5 Triangular 50 33 16 1 Trapezoidal 50 25 13 12 Two channels of output are available with independent intensity control 52 Interferential 960 Multidyne 970 Faradic The output in faradic mode is a series of 0 5ms pulses at a repetition rate of 50 Hz with zero dc content The pulse train is surged in the same way as the sinusoidal output Two channels of output are available with independent intensity control Galvanic Galvanic mode produces a direct current of up to 70mA or 140V in either a positive
37. s 1 cycle of pulse frequency lt gt Microcurrent The Microcurrent output is a unipolar square wave with a frequency variable between 0 and 1000 Hz It is a small constant current variable between 0 and 1mA and its polarity may be selected as Pos Neg or autorev half way through the treatment time S D curve The S D curve mode generates rectangular interrupted galvanic pulses for plotting strength duration curves Only channel A is energised in this mode and the peak output voltage is 140V Environmental conditions for transport and storage Temperature 10 to 35 C Relative humidity 5 to 95 Atmospheric pressure 500 to 1060 hPa Output display The Interferential 960 Multidyne 970 display shows the peak current or peak voltage of each output channel depending on whether constant current CC or constant voltage CV has been selected for the treatment All information on model serial number and month year of manufacture is located on the rear panel Interferential 960 Multidyne 970 55 The Interferential 960 Multidyne 970 has been designed to meet the requirements of BS EN 60601 1 2006 Medical Electrical Equipment Part 1 General requirements for Safety BS EN 60601 2 10 1998 Medical Electrical Equipment Part 2 10 Particular requirements for the safety of nerve and muscle stimulators and BS EN 60601 1 6 2007 Medical Electrical Equipment Part 1 6 General requirements for Safety Usability
38. stem Menu Interferential 4 pole Interferential 2 pole 16 Interferential 960 Multidyne 970 At the bottom of the screen is the status bar The status bar shows the current power source and the battery status if installed If the unit is fitted with a rechargeable battery pack the battery symbol will be shown in the status line The symbol is shaded to show the current charge state of the battery Cr indicates a completely discharged battery and IS a fully charged battery The arrow to the left of the battery symbol will be shown if the battery is being charged To conserve battery life the unit will automatically turn off the LCD backlight after 1 minute and power itself down completely after 3 minutes if there has been no operator activity and the unit is running off the battery Scrolling up or down using the More A or More Y buttons will reveal more stimulation options such as Multidyne 970 only System Menu Or System Menu Interferential 960 Multidyne 970 17 or other functions System Menu 5 D Curve User Programs Protocols System Set up System set up menu Touching the System Setup button at the bottom of the System Menu screen takes you to the System set up screen Sustem Set up Contrast Language About The Contrast button takes you to a screen where you can adjust the display contrast using up down buttons The Volume button allows for adjustment of the
39. wave 20ms rms current peak current x 0 5 The maximum rms current is 37 5 mA CP modul en courtes p riodes The CP waveform is a combination of the MF and DF waveforms The unit provides 1 s of MF half wave signal followed by 1 s of DF full wave signal the sequence being repeated continuously CPiso module en courtes p riodes isodynamigue This is the same as the CP waveform except that the amplitude of the MF signal is 12 5 less than the amplitude of the DF signal 50 Interferential 960 Multidyne 970 LP modul en longues p riodes The LP waveform provides an MF signal for 5 seconds Then over the next 2 5 seconds the other phase of the 50Hz rectified signal is smoothly increased in amplitude to give a DF signal for a further 5 seconds Finally the signal returns to MF by smoothly reducing one phase of the rectified signal over the next 2 5 seconds The complete seguence takes 15 NY MH HAN 20ms seconds Part of the LP waveform showing how the alternate phase increases in amplitude is shown above RS rythme syncop The RS waveform is 1 second of MF followed by 1 second of zero output this sequence being repeated continually Two channels of output are available with independent intensity control Polarity The above waveforms exhibit Pos polarity as they all travel above the ground zero volts level equivalent to the flat part of the waveforms The polarity switch enables the user to reve
40. waveform relative to the ultrasound head If the Autorev option is selected the polarity of the output will automatically reverse half way through the selected treatment time CC CV The output may be set to be constant current CC or constant voltage CV by pressing the CC CV button Interferential 960 Multidyne 970 27 Sinusoidal set up Multidyne 970 only Sinusoidal Treatment time is adjusted as explained above Surge Three surge patterns envelopes are available Rect rectangular Tri triangular and Trap trapezoidal A full description of these surge patterns is available in the technical specification section of this manual The surge pattern may be changed by pressing the surge button Rate Surge rates of 2 5 10 20 and 30 per minute are available The surge rate may be changed by pressing the rate button When running the surge status is shown in the top right corner of the display Sinusoidal TREATMENT CC CV The output may be set to be constant current CC or constant voltage CV by pressing the CC CV button 28 Interferential 960 Multidyne 970 Faradic set up Multidyne 970 only Treatment time is set as described above Surge Three surge patterns envelopes are available Rect rectangular Tri triangular and Trap trapezoidal A full description of these surge patterns is available in the technical specification section of this manual The surge pattern may be changed by pr
41. wer supply or a battery Power frequency magnetic field should be at levels characteristic of a typical location in a typical commercial or hospital environment NOTE UT is the a c mains voltage prior to application of the test level Interferential 960 Multidyne 970 Guidance and manufacturers declaration electromagnetic immunity The Primo Interferential 960 Multidyne 970 is intended for use in the electromagnetic environment specified below The customer or user of the Primo Interferential 960 Multidyne 970 should assure that it is used in such an environment IEC 60601 Compliance Electromagnetic environment Immunity test Test level level guidance Portable and mobile RF communications equipment should be used no closer to any part of the Primo Interferential 960 Multidyne 970 including cables than the recommended separation distance calculated from the equation applicable to the frequency of the transmitter Recommended separation distance Conducted RF 3Vrms 3V d 3 5VP Vi IEC61000 4 6 150kHz to 80MHz Radiated RF 3V m 3V m d 3 5WP E 80MHz to 800MHz IEC61000 4 3 80MHz to d 7VP E1 800MHz to 2 5GHz 2 5GHz where P is the maximum output power rating of the transmitter according to the manufacturer and d is the recommended separation distance in metres m Field strengths from fixed RF transmitters as determined by an electromagnetic site survey should be less than the compliance level in each frequency rangeb
42. yellow and B blue Adjustment is achieved by pressing and holding the relevant button A or B and then turning the rotary control Interferential 960 Multidyne 970 23 Russian set up Multidyne 970 only CP 20 00 Treatment time Is selected in the same way as previously Burst The burst frequency may be set from 1 Hz to 100Hz by pressing the Burst button 0 10 Hz is in 1 Hz steps 10 50 Hz in 5 Hz steps and 50 100 Hz in 10 Hz steps Ratio The medium frequency bursts used for Russian stimulation are surged to produce work and rest periods The surge time work is fixed at 10 seconds The ratio sets the off or rest time in ratio to the work period For example if the ratio is set to 1 4 then the work period is 10 seconds and the rest period is 40 seconds Press the ratio button to set the ratio to any integer value between 1 1 and 1 5 When running the burst status is displayed in the top right corner of the display CC CV The output may be set to be constant current CC or constant voltage CV by pressing the CC CV button 24 Interferential 960 Multidyne 970 TENS set up Multidyne 970 only Treatment time Is set in the same way as described above Type Three waveform types are available and each type is represented graphically on the LCD Symmetrical J m r Asymmetrical Seguential Selection is achieved by pressing the Type button Width pressing this button opens a new window
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