ULTRATHERM 908i - Frank`s Hospital Workshop
Contents
1. pole pole SK5 3 15 0 1 15 0 22 SK5 4 14 5 20 5 5 0 22 NR RO consumption in A in A gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 20 4 7 Check of generator freguency and pulse parameters 4 7 1 Generator freguency e Connect the test aerial to output X004 and X 005 e Connect the frequency meter to the 40 dB measurement output of the test aerial e Set the DIPLODE applicator CW mode and treatment time e Adjust the power wait for the tuning run e Determine the transmitter frequency fketpoint 27 11 Mhz to 27 13 Mhz e Turn the power selector to 0 e By way of substitution and with the above adjustments the generator frequency can be measured with a capacitor of 1 pF 400 V connected in series to socket X004 X005 in the no load operation 4 7 2 Pulsed operation of 70 Hz e Connect the oscilloscope to the 40 dB measurement output of the test aerial e Select the 70 Hz pulsed mode and the treatment time e Select the output power and wait for the tuning run e Measure the pulse duration tp setpoint 1 8 ms to 2 2 ms and frequency fsetpoint 65 Hz to 75 Hz by means of the oscilloscope e Set the power selector to 0 e The pulse duration can also be determined by means of the oscilloscope at the precision resistor of 50 9 4 7 3 Pulsed operation of 350 Hz e Select the 350 Hz pulsed mode and proceed according to clause 4 7 22. 1 2 ULTRATHERM 908i 8 Parts list Part RF connector Output curcuit DC fan Plug D16 Control knob for the dosage Adjustable capaciter with stepping motor Plug Interference protection filter 6 ESK 1 EMI filter Front foil Mains cable 3x0 75 Rectifier B80 70 50 Thermistor Stepping motor Capacitor 100001F 63V Capacitor FC Power generator Power relay Castor Castor with brake Precision resistor 50 ohm Mains input fuse holder 230 V Mains input connector Mains switch 230 V Mains switch 115 V Transformer 230 115 V Emergency off switch Emergency off pullcord Emergency off pullcord ball O ring 86x3 oil resistent for M301 C302 Harmonic filter Patient plug Control computer Power supply Thyristor gbo Medizintechnik AG 2004 37 Denotation Articel number X002 A300 M001 C302 C016 bis C019 A002 C002 C003 011 4 5011 G001 R003 M301 C001 C004 007 u C009 C015 A200 K001 008 1 0099 008 1 0100 A001 007 4 5010 A001 007 4 5011 S001 007 2 2003 S001 007 2 2004 T001 S002 A500 X004 X005 A400 A100 V001 Version 1 2 ULTRATHERM 908i 9 Wiring diagramms Picture Denotation Article number 1 Explosion diagramm ULTRATHERM 908i 2 HF part ULTRATHERM 908i A Overall Wiring Diagramm ULTRATHERM 908i 4a 5 A200 power generator 6 A 400 control computer 7 Layout A200 power generator 8 Layout A300 output circuit 9 Layout A400 control computer controle sid
3. Short circuit X204 to earth Set the unit to the stand by mode The error condition FE7 has to be indicated at the WATTS indicator Switch off the unit Eliminate the short circuit 4 10 Continuous operation 4 10 1 Preparation for continuous operation Close the RF subassembly Mount the face and in doing so observe that the earthing conductor is correctly connected Connect the lamp phantom to output X004 X005 The continuous operation is to be performed with a room temperature between 35 C and 40 S Record time type and duration and eliminate all failures of the unit 4 10 2 Performance of the continuous operation This test is to be performed in at least eight cycles of 30 min each in any pulsed and the CW mode of operation Between the individual cycles the unit is to be separated from the mains for about 1 minute install the unit select the pulsed mode Capacitor field large applicator and a treatment time of 30 The continuous operation starts with setting the maximum possible output power After the termination of the treatment time separate the unit from the mains for about 1 min Select the CW mode and the same settings as in the first cycle gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 23 e After the termination of treatment time separate the unit from the mains for about 1 min 4 11 Final test e The final test is to be performed immediately after the continuous
4. e Measure the pulse duration tp setpoint 350 us to 450 us and frequency fketpoint 325 Hz to 375 Hz by means of the oscillossope e Set the power selector to 0 4 8 Check of the power output 4 8 1 Coil applicator e Connect the test aerial including the thermal power meter to X004 X005 e Instead of test aerial and thermal power meter the precision resistor of 50 Q multimeter and oscilloscope can be used However with the pulsed modes now the power can only be gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 21 measured by means of the oscilloscope The measurement has to be performed without any earthing connection which otherwise would negatively influence the measurement results The output power is to be calculated from the measurement values of pulse amplitude Um pulse duration tp and pulse period T in the following way for CW operation the value Pew W corresponds to that of U V for pulsed operation the value of P W corresponds to that of U V multiplied by the factor t T e Set the DIPLODE applicator and treatment time e In the different modes of operation the following power values are to be checked where at least 9 LEDs of the bar indicator must be lit after the tuning W W 200 20 Pulsed mode 70 Hz Pulsed mode 350 Hz e Remove the test aerial from the unit to be tested 4 8 2 Capacitor field applicator e Connect the resistance phantom circuit to X004
5. s place of the unit s output power VD415 shows the one s place of the unit s output power Integrated circuit D403 is used as driver circuit In addition to the above signal it amplifies the motor control signals M301 which are generated at D402 P2 6 and P2 7 Both signals are directly amplified inverted and transmitted to the plug connector X402 pins 1 to 4 At each of it s outputs D403 has a free wheeling diode and the other end connectors D of which are connected to the 15 V supply voltage The switch condition of the emergency off switch connected at plug connector X403 6 is evaluated by transistor T408 and terminal D402 P2 4 T2RST of the processor which signals this information for further processing An emergency off actuation additionally releases a switching operation of the transistors T409 and T407 where the collector of the last actuates the power relay K001 via X403 5 Micro controller 87C196KB has eight analogous inputs P0 0 to P0 7 The directional coupler signals Us Un and Us Up whose amounts are used for tuning the output circuit by means of M301 are connected to P0 0 and PO 1 At X401 3 there applies a signal that is proportional to the gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 14 output power Via the resistor network R465 R466 this arrives at pin PO 2 of the processor R465 is provided for tuning the output power of the unit This circuit realizes two additional monitoring fu
6. 4 4 2 Modes of operation 4 4 2 1 MODE and APPLICATOR keys 4 4 2 2 and keys MINUTES indicator 4 4 2 3 Power selector INTENSITY indicators WATTS and TUNING 4 4 2 4 Emergency off function 4 4 2 5 RESET key 4 5 Tuning 4 6 Check of the operating voltages and currents gbo Medizintechnik AG 2004 19 Version 1 2 ULTRATHERM 908i 4 4 7 Check of generator frequency and pulse parameters 20 4 7 1 Generator frequency 20 4 7 2 Pulsed operation of 70 Hz 20 4 7 3 Pulsed operation of 350 Hz 20 4 8 Check of the power output 20 4 8 1 Coil applicator 20 4 8 2 Capacitor field applicator 21 4 8 3 Auxiliary check of the power output 21 4 9 Check of the internal error recognition circuits 22 4 9 1 Temperature monitoring circuit 22 4 9 3 Generator voltage 22 4 10 Continuous operation 22 4 10 1 Preparation for continuous operation 22 4 10 2 Performance of the continuous operation 22 4 11 Final test 23 4 11 1 High voltage test 23 4 11 2 Measurement of the leakage current of the casing 23 4 11 3 Earthing conductor test 23 4 11 4 Measurement of the mains current consumption 24 4 11 5 Check of the power values 24 4 11 6 Operation check 24 5 SERVICE INSTRUCTIONS 25 5 1 Function check of the power generator A200 25 5 1 1 Check of the supply voltages 25 5 1 2 Readiness for operation of the A200 subassembly 25 5 1 3 General information on the power loop
7. 26 5 1 3 1 Level control 26 5 1 3 2 Amplification tract 26 5 1 3 3 Power and mismatching meter LFM 27 5 1 3 4 Adding amplifier 27 5 1 3 5 Subtracting amplifier 28 5 1 3 6 Multiplier N202 28 5 1 3 7 Setpoint actual value comparator 28 5 1 3 8 Cable voltage monitoring circuit 29 5 1 3 9 Analogous OR interconnection 29 5 1 4 Operation of the power supply 29 5 1 5 Oscillator 30 5 1 6 Driver 30 5 1 7 RF circuits at the final stage output 30 5 1 8 Typical measurement values with a matched load 50 ohm 30 5 2 Repair instructions for the control computer A400 31 5 2 1 Indication of the error conditions 31 5 2 2 Description of the control computer signals 32 5 3 Power supply A100 33 5 4 Output circuit A300 33 5 5 Harmonic filter A500 33 gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 6 DISASSEMBLY ASSEMBLY FLOW CHART 7 ORDERING INFORMATION 8 PARTS LIST 9 WIRING DIAGRAMMS CORRECTION SHEET gbo Medizintechnik AG 2004 34 35 37 38 39 Version 1 2 ULTRATHERM 908i 6 Overview Chapter 1 describes the basic purpose of the ULTRATHERM 908i Chapter 2 gives technical data of the unit Chapter 3 explains the functions of the subassemblys and the overall wiring diagramm Chapter 4 give some safety instructions during the service and describes the test of the whole unit Chapter 5 includes the service instructions and informs about the trobleshooting Chapter 6
8. be neglected Calibration of the thermal probe with the power meter e Set the following parameters on the power meter dB REL 39 70 dB LINEARITY FACTOR according to the value on the probe label CAL FACTOR 1 RANGE 0 AVERAGE 7 DUTY CYCLE 100 e Connect the power meter to the 40 dB output of the test aerial gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 19 e Connect the digital multimeter between the X206 and X210 terminals e Adjust the operating voltage 15 V to 15 00 V 15 05 V by means of P1 A100 e Setthe unit to be tested to the following values CW mode of operation DIPLODE applicator Treatment time 30 Power 9 e After the automatic tuning run adjust the output power to 9 W 0 3 W by means of R465 e Set the power at the unit to be tested to 150 e Adjust the output power to 150 W 2 W by means of R202 e Set the power selector to 0 4 6 Check of the operating voltages and currents e Set the mains power supply to rated mains voltage constant e The measurement of the mains current consumption is performed by means of the moving iron instrument e With a load resistance of 50 Q at X004 X005 the operating voltages and currents are to be measured in the stand by mode 1 and for the output power of 200 W according to the following table Test Setpoint 1 Setpoint 2 Operating voltages between in V in V
9. determined at X212 however the sign is changed gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 28 5 1 3 5 Subtracting amplifier It includes R212 R215 R214 N201 3 R256 up to the plug connector X211 The difference of the voltages measured at X217 and X218 can be determined at X212 however the sign is changed 5 1 3 6 Multiplier N202 The variable resistors R203 to R205 shall not be readjusted They are provided for offset tuning of the integrated circuit At the output of the multiplier X216 a voltage Uo must apply that can be determined as follows _ Voltage at X215 e Voltage at X214 U 10 There shall be no voltage drop at the resistors R222 and R223 When after any integrated circuit replacement a new offset tuning is necessary perform as follows e ON ar e Connect X214 and X215 to earth set R205 to 0 V at X216 e Apply 5 V at X215 connect X214 to earth set R204 to 0 V at X216 e Apply 5 V at X214 connect X215 to earth set R203 to 0 V at X216 e Repeat the adjustment one times more A 4 5 V flat battery can also be used instead of the 5 V 5 1 3 7 Setpoint actual value comparator It includes R221 R225 R226 C210 V214 N201 1 A voltage that is exactly proportional to the active output power delivered applies at X216 where 2 5 V correspond to an output power of 250 W By means of an suitable power meter the adjustment is possible by R202 In any case only one of the
10. operation in the hot condition 4 11 1 High voltage test e The test is to be performed in accordance with DIN VDE 0750 Part 1 and DIN VDE 0750 Part 204 e Connect the unit to be tested to the high voltage testing device e Switch on mains switch S001 e Apply the test voltage of 1 5 kV 50 Hz to the contact positions of the testing device for 1 min e In way of substitution the test can also be performed with the pins of the power cord plug short circuited and by applying the test voltage between this short circuit jumper and the earthing contact of the power cord plug e The applicators are tested with a voltage of 4 kV e Record the test result 4 11 2 Measurement of the leakage current of the casing e The test is to be performed in accordance with DIN VDE 0750 Part 1 and DIN VDE 0750 Part 204 e Connect the unit to be tested to the leakage current measuring device e Switch on mains switch S001 e Measure the leakage current of the casing at a rated voltage of 253 V Record the maximum measurement value licak max 0 5 mA e Perform the measurement of the leakage current of the casing according to DIN 57 751 VDE 0751 Record the measurement values 4 11 3 Earthing conductor test e The test is to be performed in accordance with DIN VDE 0750 Part 1 and DIN VDE 0750 Part 204 e Connect the unit to be tested to the earthing conductor testing device gbo Medizintechnik AG 2004 Version 1 2
11. voltage Ups 35 V 5 1 3 3 Power and mismatching meter LFM It includes C201 to C205 L224 L225 R201 to R211 V203 and V204 ATTENTION Do not manipulate C202 and R201 R201 shall not be set to 0 An adjustment is only possible with an load resistor of accurately 50 Q at X222 and a RF output power of about 200 W Only under these conditions a mutual adjustment of C202 and R201 is possible for a minimum voltage at X218 The reference voltages of the rectifiers V203 and V204 can be measured at eyelets X217 and X218 Their range of values is between 0 and 5 V The voltage at X217 is always more negative than that at X218 or equal in the limit case The allocation is as follows e Correct matching at X222 50 Q U at X218 lt 10 mV at P 0 to 250 W U at X217 0 to 5 V according to the output power e Medium mismatching at X222 normally tuned condition U at X218 0 to 5 V according to the output power U at X217 0 to 5 V according to the output power The voltage at X217 is always more negative than that at X218 e Extreme mismatching at X222 separated cable connection etc U at X218 0 to 5 V according to the output power U at X217 0 to 5 V according to the output power Both voltages are equal in value With 100 W output power about 3 5 V are applying at X217 5 1 3 4 Adding amplifier It includes R213 R216 N201 4 R257 up to the plug connector X212 The sum of the voltages measured at X217 and X218 can be
12. 26 or L227 are bend the resistors R250 and R251 can burn off An auxiliary matching is possible by temporarily clamping two LEDs each which are connected in anti parallel to each other in parallel to R250 and to R251 With small output powers these LEDs can be taken to the extinguished mode by slightly bending the coils L226 and L227 The coil 223 can only be adjusted by means of a spectrum analyser or wobbler By slight bending it is adjusted to serial resonance with C265 C266 at 54 24 Mhz In case of after sales service work the coils L219 to L222 can only be checked for their geometry 9 L220 L221 222 Inner diameter mm Mounting height on the PCB mm Distance between tums mm Ee Length of the coil mm ee ee eee eee ae 5 1 8 Typical measurement values with a matched load 50 ohm Un X207 2 0 V The output power is 100 W U at X216 1 0V U at X217 3 5V U at X218 0 2 V U at N201 3 pin 8 3 3 V U at N201 4 pin 14 4 3 7 V U at N201 1 pin 1 3 5 V U at N201 2 pin 7 14 3 V U at the basis of V210 3 1V gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 31 5 2 Repair instructions for the control computer A400 5 2 1 Indication of the error conditions The control computer subassembly performs a series of internal monitoring operations which in case of an error release the following error messages Indisation Cause of error Operation error the power selector has been actu
13. 29 cm 2 Cloth coating 2 Rubber bands 135 cm 4 Fastening buttons gbo Medizintechnik AG 2004 35 article number 23 58 984 Q 4547 23 58 976 Q 4547 23 58 968 Q 4547 23 58 950 Q 4547 see other accessory 19 05 215 Q 4824 23 38 499 Q 5028 23 51 245 Q 4562 19 89 870 Q 4824 19 53 363 Q 4514 19 53 413 Q 3236 19 53 272 Q 3236 23 95 606 Q 3236 45 38 971 EH 725 22 74 801 Q 1320 19 53 421 Q 3236 19 53 280 Q 3236 23 95 614 Q 3236 45 38 971 EH 725 22 74 801 Q 1320 19 53 439 Q 3236 19 53 298 Q 3236 23 95 622 Q 3236 45 38 963 EH 725 22 74 801 Q 1320 Version 1 2 ULTRATHERM 908i Coil applicator needs one 1 support arm MINODE with cable MONODE with cable DIPLODE with cable Other accessory Applicator connection cable without lead protection Length 120 cm Applicator connection cable with lead protection Length 120 cm Arm regular Flex arm on the left Flex arm on the right Cable holder for cable without lead protection Clamp small for cable without lead protection Clamp big for cable with lead protection Indicator discharge tube User Manual for the ULTRATHERM 908i in English User Manual for the ULTRATHERM 908i in German gbo Medizintechnik AG 2004 23 50 114 0 4558 23 47 573 Q 4544 42 26 809 Q 4562 19 05 215 Q 4824 19 89 870 Q 4824 011 1 0156 011 1 0169 011 1 0170 23 38 499 Q 5028 23 51 245 Q 4562 19 53 363 Q 4514 22 53 722 Q 3215 011 7 0324 011 7 0323 Version 36
14. Coupling with patient Dosage knop 1 2 2 Operation Direction Connect the therapy unit to the mains socket outlet Connect the applicator s to the therapy unit Attach the applicator s to the patient Turn on the therapy unit with switch 1 Select the mode of operation buttons 3 4 5 Select the mode of the applicator s buttens 6 to 11 Set the treatment time button 12 13 Set the dosage knob 17 Electric power is applied to the output the treatment timer starts operation After the chosen treatment time has elapsed the therapy unit automatically turns off and emits an intermittent acoustic signal for about 10 s This signal is repeated every minute until the dosage knob 17 is reset by turning to the left counterclockwise When an error is displayed except for FE 0 press RESET button 2 and readjust if required The entire therapy unit is switched off by actuating swich 1 again For more imformation please look in the User Manual of the ULTRATHERM 908i gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 2 Technical data Mains Voltage 15 50 60 Hz On request 15 50 60 Hz Electric fuses external 10 A slow acting for 230 V 16 A slow acting for 115 V Power consumption maximum about 700 VA Stand by oparation about 100 VA Freguency 27 12 MHz 0 6 Yo RF output power at 50Q continuous mode Pulsed mode O Pulse parameters Peak pulse power 400 W Pulse repetition fegu
15. ULTRATHERM 908i 24 e Measure the voltage drops between the earthing conductor of the mains connector and all metal parts of the unit that can be touched under the following condition Tearth 10 A Uearth setpoint S2N e Record the maximum measurement value e Perform the earthing conductor test according to DIN 57 751 or VDE 0751 respectively e Record the measurement values 4 11 4 Measurement of the mains current consumption e Measure the mains current consumption according to clause 4 6 and report the value 4 11 5 Check of the power values e Measure the power values according to clauses 4 8 1 and 4 8 2 and report the values 4 11 6 Operation check e Perform the operation check according to clause 4 4 gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 25 5 Service instructions 5 1 Function check of the power generator A200 In case of troubles these instructions can be used for troubleshooting and for the determination of whether the power generator correctly operates or not It shall be possible to localise the trouble up to the corresponding faulty subassembly ATTENTION The setting components on the PCB except R202 and R255 shall not be readjusted because special measuring instruments are required for the different setting values Measurement conditions If not given elsewhere all voltages given are to be measured against earth 5 1 1 Check of the supply voltages Check e 15 V X206 a
16. X005 e Setthe Electrode to skin distance to 35 mm e Set the Capacitor field electrode large applicator CW mode and treatment time e Set 200 W by means of the power selector e After the tuning run at least 8 LEDs of the bar indicator must be lit 4 8 3 Auxiliary check of the power output e Connect the corresponding applicator to the output of the unit e A box type plastic or glass container 5 1 to 10 1 is to be filled with a 0 9 salt solution e Position the applicator to the immediate vicinity of the container e After the tuning run set the output power of the unit to 200 W and change the position of the applicator so that as much as possible LEDs 7 to 10 of the bar indisator are lit e As additional control the assigned RF indicator can be used by positioning in front of or between the electrodes In this case the active surfaces of the capacitor field electrodes are put together gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 22 4 9 Check of the internal error recognition circuits 4 9 1 Temperature monitoring circuit Set any mode of operation applicator treatment time and power at the unit to be tested Short circuit C008 RF subassembly to earth The error condition FER has to be indicated at the WATTS indicator and 0 at the MINUTES one Eliminate the short circuit and actuate the RESET key 4 9 3 Generator voltage Switch off the unit discharge C001
17. ains switch S001 4 Thyristor V001 19 exchange replace 4 rectifier G001 21 5 harmonic filter A500 replace 16 replace 2 transformer T001 4 power generator A200 exchange 22 replace gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 7 Ordering Information Accessories Capacitor field set consisting of 2 Schliephake spacer electrodes with calibration pin a Plate diameter 42 mm outer diameter 85 mm b Plate diameter 85 mm outer diameter 130 mm c Plate diameter 130 mm outer diameter 172 mm d Plate diameter 172 mm outer diameter 220 mm 2 Support arms per choice 2 x regular arms or flexible arm left and right 2 Applicator connection cables 120 cm without lead protection 2 Cable holder for cable without lead protection 1 Cable clamp small for cable without lead protection or 2 Applicator connection cables 120 cm with lead protection 1 Cable clampe big for cable with lead protection Plate Applicator set 1 consisting of 2 Soft rubber plate applicators 8 cm x 14 cm with cable and plug 4 Felt spacer 9 cm x 16 cm 2 Cloth coatings 2 Rubber bands 42 cm 4 Fastening buttons Plate Applicator set 2 consisting of 2 Soft rubber plate applicators 12 cm x 18 cm with cable and plug 4 Felt spacer 13 cm x 20 cm 2 Cloth coatings 2 Rubber bands 42 cm 4 Fastening buttons Plate Applicator set 3 consisting of 2 Soft rubber plate applicators 18 cm x 27 cm with cable and plug 4 Felt spacer 19 cm x
18. ated without any setting of FEI operation parameters in advance At the time of putting the unit into operation a key S401 to S408 S410 to S412 is short circuited The encoded key designation appears an the MINUTES indicator there 1s the following allocation 1 S401 LG 7 S406 DIPLODE 2 S408 small coil field applicator 8 S411 medium cap field appl 3 S402 350 Hz pulsed mode 9 S404 CW operation 4 S407 medium coil field applicator A S405 LE 5 S410 large cap field applicator b S412 small cap field appl 6 S403 70 Hz pulsed mode An output power is measured though the power selector is on zero The power measured after the matching operation indication A exceeds the permissible limit value In pulsed operation an inadmissible high power has been measured during the pulse interval FES The voltage applying at C402 cannot be adjusted to the setpoint operating voltages of 15 V are not correct network N401A or pulse generator D408 is defective With any power selection the output power measured is zero The supply voltage at X002 3 is inadmissible high the triggering of thyristor V001 is disturbed The power of the lowest range cannot be adjusted in the corresponding mode The thermistor circuit R003 is interrupted Thermal overloading of the power generator or short circuit of R003 respectively In the first case wait only for cooling down in the stand
19. by mode in the second one the unit is defective this defect can be recognized by the indication 0 at the treatment time indicator FEC Shows a Reset actuation by integrated circuit D401 An error message can only be indicated within the framework of the operation of microprocessor D402 gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 32 5 2 2 Description of the control computer signals The following typical voltages can be measured to earth D401 11 WDD D401 14 WDO D401 15 RES D401 1 VCC D402 65 CLKOUT D402 39 P2 5 PWM C402 D402 45 P4 7 AD15 N401B 9 D408 2 D408 4 D402 11 P0 4 D402 4 P0 3 R445 R444 T407 emitter gbo Medizintechnik AG 2004 5 V CMOS pulses low active duration about 0 8 ms period 4 0 ms to 4 8 ms TTL high TTL high 5 V Vpp at pin 68 5 V CMOS balanced clock of about 4 Mhz 5 V CMOS pulses high active period about 122 us pulse duration about 20 us in the stand by mode pulse duration about 92 us in 30 W pulsed mode pulse duration about 90 us in 200 W CW mode DC voltage between 0 5 V and 4 V depending on the duty factor at D402 39 superimposed by a serrated voltage Upp lt 50 mV 5 V CMOS Stand by mode e high level 70 Hz pulsed mode e pulses low active duration about 2 30 W ms period about 14 ms 350 Hz pulsed mode e pulses low active duration about 30 W 410 us period about 2 8 ms CW mode 200 W e
20. e 10 Layout A400 control computer component side 11 Layout A500 harmonic filter gbo Medizintechnik AG 2004 38 Version A Version 1 2 ULTRATHERM 908i Correction sheet gbo Medizintechnik AG Dokumentation Kleiststr 6 D 64668 Rimbach Germany Please revise the following errors and stimulation to the document page line wrong text right text PATENT Address Artikel Nr 001 9 0086 gbo Medizintechnik AG 2004 Version 1 2
21. e RF subassembly 4 3 1 Check of earthing connections e Visual inspection of the X001 connections to the unit s rear wall and control desk e Visual inspection of screw connections at the base and RF subassemblies 4 3 2 Check of the fuse elements e F001 F002 combined element A001 according to the voltage version 230 V version SP 6 3 A fast ceramic pipe dim 5 mm x 20 mm 115 V version FST 6 26 A slow glass pipe dim 6 3 mm x 32 mm e F003 mains transformer T001 FST 50 mA slow glass pipe dim 5 mm x 20 mm e FI power supply A100 FST 1 6 A slow glass pipe dim 6 3 mm x 32 mm 4 4 Operation test e Set mains switch S001 to position 0 e Connect the unit to the line voltage regulator switched to the rated mains voltage e Mains voltage indicator in S001 shall not be lit 4 4 1 Stand by operation e Switch on the unit by means of S001 e Mains voltage indicator in S001 shall be lit green only with the 230 V version e Treatment time MINUTES VD41 1 412 indicates 0 e Power indicator WATTS VD413 to 415 indicates 0 e All other indicators are inactive gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 17 4 4 2 Modes of operation 4 4 2 1 MODE and APPLICATOR keys e Pressing one of the 9 keys S402 to 404 406 to 408 410 to 412 activates the assigned LED 4 4 2 2 and keys MINUTES indicator e A short actuation
22. ency 70 Hz 350 Hz Pulse width 2 ms 0 4 ms Se Safety test DIN VDE 0750 Part 1 DIN VDE 0750 Part 204 DIN VDE 0871 MedGV group 3 gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 11 3 Electrical and functional descriptions 3 1 Description of the subassemblies 3 1 1 Power supply subassembly A100 The A100 subassembly is a mains freguency clocked switching power supply generating the V1 5 V V2 15 V and V3 15 V supply voltages The outputs SK4 to SK6 are connected in parallel to each other Through plug connector SK7 terminals 1 and 3 the mains power is fed in this connector is designed for 230 V as well as 115 V The jumper Link for 115 V operation is to be plugged in accordance with the available mains voltage The fine adjustment of the V2 supply voltage is to be performed by means of control P1 When exchanging this subassembly it is to be observed that the Y capacitors C16 C17 are not provided and that an electrically safe connection between earthing conductor and base plate is to be ensured 3 1 2 Power generator subassembly A200 This module can be subdivided into three main sections The first one includes the crystal controlled generation amplification and filtration of the 27 12 Mhz high frequency power The second one of this subassembly includes the measurement and control circuits which enable an exact adjustment of the output power And the third section contains the control circuit o
23. explains single steps to exchange a part Chapter 7 gives ordering information Chapter 8 gives a list of parts Chapter 9 contains the pictures and the wiring diagramms of the unit gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 7 1 General Information 1 1 Purpose The ULTRATHERM 908i is a high performance short wave therapy unit for high freguencey heat therapy that operates at the well proved freguency of 27 12 Mhz wave lengh 11 m It enables the classical therapy in capacitor field and electromagnetic coil fields in both the continuous and the pulsed mode of oparartion and therfore it is suited for all heat therapy treatments in clinic as well as practice The use of high frequency energy for the heat therapy has the advantage of larger penetration depth in contrast to the conventional methods such as hotpacks baths infrared light heat pillows and even to the mirowave The heat endogenically generated by this therapy unit induces a whole range of physiological processes which for example spasmodically influence the muscular system tendons and other connective tissue structures increase the cell metabolism rate of enzyme reaction and improve the blood circulation in the area under treatment As the high frequency energy can be applied in short but high energy shocks pulsed mode the penetration depth can be increased futher particularly the positive effect on the blood circulation while the thermosen
24. f the operating voltage of the amplifier Any repair work of this subassembly shall only be performed by the manufacturer That s why this description is restricted mainly to the terminals The supply power of the subassembly is fed via the plug connectors X206 15 V X209 15 V and X210 earth Additional supply terminals are X201 to X205 which are used for the regulation of the operating voltage of the output amplifier There importance as well as that of the terminals X207 X208 X211 to X213 is described in detail in clause 3 2 The power is coupled out at the coaxial connector X222 This A200 subassembly is delivered in the tested and tuned condition Only the fine adjustment of the output power is to be performed by means of R202 3 1 3 Harmonic filter subassembly A500 A harmonic filter that additionally attenuates the RF interference spectrum in the frequency range between 54 Mhz and 100 Mhz is directly connected to the RF output of the power generator It s adjustment is necessary to ensure being below the interference levels given by law In case of erroneous operation this subassembly has to be replaced in any case Avoid any dismounting of the air core chokes L501 L502 The cover on this subassembly is absolutely necessary to maintain the low RF interference values required by law gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 12 3 1 4 Output circuit subassembly A 300 The output circuit 1s provided to
25. f the Small coil field MINODE applicator gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 13 VD405 signals the adjustment of the Large capacitor field electrode applicator VD406 signals the adjustment of the Medium capacitor field electrode applicator VD407 signals the adjustment of the Small capacitor field electrode applicator VD408 signals the adjustment of the 350 Hz pulsed mode of operation VD409 signals the adjustment of the 70 Hz pulsed mode of operation VD410 signals the adjustment of the continuous wave CW mode of operation The above information applies in multiplexed form at the processor output pins P3 0 ADO to P3 7 AD7 and is stored by the integrated circuits D404 to D406 This includes also the triggering of the piezo signal transmitter B401 Signal D406 Q5 and D406 Q6 is not used The 7 segment indicators VD411 to VD415 are also triggered in the multiplexed mode of operation Data sources are the processor output pins P4 0 AD8 to P4 3 AD11 the hexadecimal data of which are decoded by integrated circuit D407 Amplified by T402 to T406 the multiplexed signals P2 0 TXT and P1 0 to P1 3 are fed to the anodes of the indicator elements and show the following information VD411 shows the ten s place of the minutes of treatment time VD412 shows the one s place of the minutes of treatment time VD413 shows the hundred s place of the unit s output power VD414 shows the ten
26. generation of the reset signal is also possible by means of key S409 The supply voltages 5 V 15 V and 15 V are applied to the subassembly via X403 Mode of operation applicator type and treatment time are adjusted by means of the key matrix S401 to S408 and S410 to S412 They are triggered by the output ports P1 4 to P1 7 and evaluated by the input ports P2 1 to P2 3 which are loaded by the pull up resistors R449 to R451 The output power is adjusted by means of pulse generator D408 feeding the two direction of rotation dependent signals 2 and 4 to the prosessor via NMI and P0 5 Processor output P2 5 PWM delivers a pulse duration modulated signal that is converted to a DC voltage by the two operational amplifier networks N401A N401B and used to control the power output of generator A200 The connection C402 to D402 P0 6 is used to monitor the D A conversion In the pulsed modes of operation the DC voltage is keyed via processor output pin P4 7 AD15 and transistor T401 The generator control voltage the level of which is also monitored by processor P0 6 applies at plug connector X401 5 The bar indicator VD401 consists of ten LEDs and signals the degree of matching between patient circuit and generator output The individual LEDs VD402 to VD410 have the following meaning VD402 signals the adjustment of the DIPLODE applicator VD403 signals the adjustment of the Medium coil field MONODE applicator VD404 signals the adjustment o
27. interference suppression level gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 4 Test 4 1 Safety instructions Since the wiring transformers and switching assemblies contained in this unit are connected to line voltages the measurement and setting procedures reguired for troubleshooting and adjustment must be performed with the utmost care Do not touch any connected measuring instruments or metal parts of the load test object while the unit is switched on Risk of burns Persons who are in the area surrounding the cables or applicators working have to deposit all metal objects such as watches jewelry keys metal rimmed eyeglasses hearing aids electronic equipment etc 4 2 Testing devices and measuring instruments High voltage measuring instrument 6 kV High voltage testing equipment Leakage current measuring device Earthing conductor testing device 20 A Insulation resistance measuring instrument Test aerial Power meter Probe Precision resistor 50 Q cf Spare parts list Line voltage regulator 230 V Adjustable isolating transformer Digital multimeter Moving iron instrument 0 5 A 10 A Oscilloscope 50 Mhz Frequency meter 50 Mhz Resistance phantom circuit Lamp phantom Thermometer 50 C Diverse measuring lines and coaxial transitions gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 16 4 3 Pretest e Remove the face of the unit e Remove the cover of th
28. low level Stand by mode e about 0 5 V M Hz pulsed mode e pulses high active duration about 30 W 2 ms period about 14 ms high level about 4 2 V low level about 0 5 V 350 Hz pulsed mode e pulses high active duration about 30 W 410 us period about 2 8 ms high level about 4 2 V low level about 0 5 V CW mode 200 W e about 4 0 V When the pulse transmitter is not actuated both terminals are on TTL low level During the turning both terminals deliver time delayed high level pulses the phase of which is given by the direction of rotation About 0 8 V in stand by mode about 2 9 V at an output power of 200 W 50 at X004 X005 About 2 5 V at a temperature of the heat sink A200 of 25 C the voltage decreases with increasing temperature 5 V in case of emergency off switch actuation 0 6 V 1 2 V in case of emergency off switch actuation 5 V 0 V in case of emergency off switch actuation 15 V relay K001 must switch over Version 1 2 ULTRATHERM 908i 33 The other signals of the analogous inputs port 0 of D402 are given in the Overall Circuit Diagram At the pins of ports 1 to 4 which are not described there apply signals the parameter of which are changed during the program running time in general they are pulse shaped 5 3 Power supply A100 At the A100 subassembly only the output voltages are checked in the stand by and power modes In case of a negative result check and if required
29. match the application part which is connected to the balanced output X004 X 005 as exactly as possible to the generator The matching is performed by means of the adjustable capacitor C302 driven by stepping motor M301 which is a component of a serial circuit in connection with the coils L302 and L303 The RF power is fed through connection X301 The RF power flows via the capacitor chain C303 to C305 to the balance to unbalance transformer L301 L302 L303 whose secondary windings are parts of the serial circuit mentioned above The stepping motor is triggered by control computer A400 4 additional diodes protect the stepping motor they are not drawn in the wiring diagramm All other parts given in the layout are not required 3 1 5 Control computer subassembly A400 Subassembly A400 is the central unit which realizes all signal and operation functions as well as measurement and control operations The micro controller 87C196KB which reduces the computer hardware to a minimum and thus is a very service friendly solution is the basis of this control computer The integrated circuit 87C196KB contains clock generator CPU program memory A D converter counter timer and several different input and output ports For clock generation 8 Mhz only the external components Q401 C406 and C406 are to be connected After switchingon the watch dog circuit D401 generates a reset signal and initiates a defined start of the internal program But the
30. nctions A thermistor R003 is provided at the heat sink of subassembly A200 for checking the temperature of this subassembly It is connected to X401 4 R439 is a component of a voltage divider whose output value is measured at pin P0 3 The voltage across the power stage of subassembly A200 is monitored through the voltage divider R440 R441 whose feeding point is connected to X401 8 The diodes V401 to V405 and capacitors C407 to C425 meet protective and RF interference protection functions 3 2 Description of the Overall Wiring Diagram The power supply of the ULTRATHERM 908i is realized by the mains transformer T001 and the A100 subassembly that is connected with the 115 V or 230 V 50 Hz 60 Hz mains via mains input A001 RF interference protection filter A002 and mains switch S001 The unit is adjusted to the corresponding mains voltage by the manufacturer The 45 V output voltage of T001 is required for generating the supply voltage of the power stage of subassembly A200 The voltage is rectified by bridge G001 the positive pole of which is connected to X205 In the other DC path there is arranged thyristor V001 which is triggered by the operating voltage control circuit of subassembly A200 and charges capacitor C001 in dependence on the generator output power This is synchronuously performed to the mains frequency where the 26 V voltage of T001 between X205 and X203 is used The regulated DC voltage between X205 and X201 is superimposed by a
31. nd 15 V X209 against earth e The secondary voltages of the mains transformer under no load conditions i e without any RF power output about 45 Vrms between X002 1 and X002 1 about 26 Vrms between X002 3 and X002 4 5 1 2 Readiness for operation of the A200 subassembly Separate the plug connection X207 and apply earth potential to the control voltage input Uin X207 i e RF power is not delivered Then measure the following voltages e Power supply A voltage of about 13 V appears at X205 This voltage is superimposed by a serrated voltage of about 3 V and irregular period in the second range At its pin 15 the integrated circuit N203 delivers an internally generated reference voltage of about 8 2 V measured against X205 e Voltage of the level control A voltage of about 0 V appears at the basis of V210 thus the level control is blocked e Analogous computer gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 26 No voltage can be measured at the measurement points X214 to X218 e Cable voltage monitoring A voltage of about 14 V applies at the output of the operational amplifier N201 2 pin 7 5 1 3 General information on the power loop The power loop includes the following components 5 1 3 1 Level control The level control consists of R242 V210 V211 L212 C223 The range of the input voltage at the basis of V210 is about 0 to 12 V With a voltage below approximately 2 V the level control delive
32. of the key S405 increments the treatment time indicator MINUTES by end value 30 e Continuous actuation of the key increases the indicated time in steps of 5 digits e g 5 10 15 etc end value 30 e The actuation of the key S401 has the similar effect but the time indicated is reset end value 0 e Simultaneous actuation of both keys results in the indication of 0 4 4 2 3 Power selector INTENSITY indicators WATTS and TUNING e Separate the coaxial plug connection X222 and connect the generator output to the test aerial or 50 Q precision resistor respectively e Check the indication of the power ranges 3W to30W in 3 W steps 30W to80W in 5 W steps 80 W to 200 W in 10 W steps as well as the power range limits in dependence on the mode of operation and the applicator selected in the following way Select CW mode DIPLODE applicator and treatment time gt 0 Turn the power selector D408 by one click stop detent to the right side A must appear on the MINUTES indicator for Tuning After switching over the indicator to treatment time the power of 9 W must be displayed and all LEDs of the bar indicator VD401 are activated Check the power ranges by additional incrementing the power selector to the right e Then set the power to 0 by turning the power selector to the left side e Repeat this prosedure in the CW mode of operati
33. on for all applicators where the initial values after the tuning operation 9 W each as well as the end values are to be checked coil field electrode small 30 W coil field electrode medium 90 W capacitor field electrode small 21 W gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 18 capacitor field electrode medium 80 W capacitor field electrode larg 200 W e Subsequently check the limit values of the power ranges in the pulsed modes initial values 3 W each the end values are 30 W for all applicators except the small capacitor field electrode with 21 W 4 4 2 4 Emergency off function e Set the output power to any value gt 0 e Wait for the duration of tuning process e Actuate the emergency off switch e A continuous acoustic signal must sound and all optical indications must be exstinguished Relay K001 must be released Then turn the power selector to the left The acoustic signal terminates and the unit changes to the stand by mode Relay K001 must be active 44 2 5 RESET key e Adjust any treatment time value e Press RESET key S409 e After this the unit must be in the stand by mode 4 3 Tuning e Setthe unit to the stand by mode e Engage the coaxial plug connection X222 e Connect the test aerial to the unit output X004 X005 By way of substitution the output power can be determined by means of the precision resistor of 50 and a multimeter In such a case the following three steps can
34. operational amplifiers N201 1 or N201 2 controls the voltage level The output at which the lowest voltage applies pin 1 or pin 7 controls the level In the case pin 1 controls that means at pin 7 there applies about 14 V only half of the voltage applying at X207 can be measured at X208 With a good matching to X222 normally voltages of about 3 V to 9 V can be measured at pin 1 of N201 1 but the value depends on the RF power gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 29 5 1 3 8 Cable voltage monitoring circuit This circuit includes N201 2 and the externally connected components of which The sum voltage at X212 is a measure of the maximum RF voltage along the cable at X222 Integrated circuit N201 2 monitors this voltage In the standard case 1 e the load is matched to X222 and power reguirement below 250 W about 14 V apply at the output pin 7 The cable voltage monitoring 1s active when extreme mismatching occurs at X222 and high RF power is required at the same time For checking R219 can be bridged for a short time This results in blocking the level control and thus the RF power becomes zero 5 1 3 9 Analogous OR interconnection It includes V201 V202 R229 Via R229 a current is fed into the basis of V210 trying to increase the level When the RF voltage level is sufficient one of the control systems becomes active and takes over a component current through V201 or V202 In this way the output
35. phos Short Wave Therapy Unit ULTRATHERM 908i Service Manual gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 2 The gbo Medizintechnik AG has taken care in preparation of this service manual but makes no expressed or implied warranty of any kind and assume no responsibility for errors or omissions All rights reserved No part of this service manual may be reproduced in any form or by any means electronic mechanical or otherwise without the prior written permission of the gbo Medizintechnik AG gbo Medizintechnik AG 2004 gbo Medizintechnik AG Kleiststr 6 D 64668 Rimbach Germany Tel 0 62 53 808 0 FAX 0 62 53 808 300 gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i Contents CONTENTS OVERVIEW 1 GENERAL INFORMATION 1 1 Purpose 1 2 Short User Manual 1 2 1 Operation Unit 1 2 2 Operation Direction 2 TECHNICAL DATA 3 ELECTRICAL AND FUNCTIONAL DESCRIPTIONS 3 1 Description of the subassemblies 3 1 1 Power supply subassembly A100 3 1 2 Power generator subassembly A200 3 1 3 Harmonic filter subassembly A500 3 1 4 Output circuit subassembly A300 3 1 5 Control computer subassembly A400 3 2 Description of the Overall Wiring Diagram 4 TEST 4 1 Safety instructions 4 2 Testing devices and measuring instruments 4 3 Pretest 4 3 1 Check of earthing connections 4 3 2 Check of the fuse elements 4 4 Operation test 4 4 1 Stand by operation
36. power is stabilised V201 and V202 are used to decouple the outputs of the operational amplifier 5 1 4 Operation of the power supply The power supply delivers the voltage at X205 which depends on the AC collector voltage of the final stage transistor Tthis is obtained by feeding a current at pin 10 of N203 through V215 V216 R258 In case of matching the following relations apply Output power W Voltage at X205 V DI 13 Be careful when working at the power supply With full output power a direct short circuit between X205 and earth can damage the integrated circuit N203 gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 30 5 1 5 Oscillator The oscillator operates at a voltage of 6 2 V measured across C219 The basis voltage of V208 is about 3 6 V The RF wave should not be measured at V208 because the oscillations can be interrupted in case of loading that s why it is measured at V209 By means of L210 the voltage is tuned to the maximum of about 10 Vy to 13 Vyp measured at the collector of V210 The core of L210 shall not be displaced without checking the oscillations by a RF oscilloscope because the oscillator operates only in a small tuning range of the core 5 1 6 Driver A voltage of 3 8 V measured across C233 ensures a sufficient zero signal current of V209 5 1 7 RF circuits at the final stage output Spesial RF measuring instruments are required for matching the output circuits When the coils L2
37. replace the mains fuse element of this subassembly If this does not eliminate the trouble replace the subassembly WARNING There are several accessible components on mains potential ATTENTION The earthing conductor is screwed on and thus the contact is not necessarily ensured 5 4 Output circuit A300 With this subassembly take particular care for correct soldered connections and tightened screw connections otherwise due to the heavy RF currents partial thermal overloading can occur 5 5 Harmonic filter A500 Take particular care for correct soldered connections In case of voltage arcovers or burning replace the subassembly by an intact adjusted one In any case do not replace components of this subassembly because this would negatively affect the adjustment which can only be performed by the manufacturer gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 34 6 Disassembly assembly flow chart look also picture 1 and 2 1 back panel 1 open By parent ping 10 6 back panel 2 open k PANELIT remove remove d e 2 control computer A400 2 power supply A100 3 RF panel 5 remove 6 output circuit A300 exchange replace exchange d 2 interference filter A002 2 fan M001 23 replace exchange 4 capacitor C001 18 5 harmonic filter case 17 exchange remove d 2 m
38. rs no output power The level control is set to full amplification with a voltage of about 12 V to 14V 5 1 3 2 Amplification tract This tract includes R252 C235 L213 V212 C238 C239 L216 V213 L219 L220 C263 C264 L221 L222 L226 C273 C274 C275 to X219 All stages operate in B point mode without any zero signal current The following voltage values can be used as reference Voltage values to be determined by means of an oscilloscope The following list of levels is given for the elimination of errors if required It is valid for an output power of 250 W at 50 with the control voltage of 5 V at X207 and a DC voltage of 48 V at X205 The values given are average ones e Voltage at the collector of V209 10 V to 13 Vyp Vmax 20 V Vmin 7 V e Voltage at the basis of V211 4 Vyp to 5 Vyp Vmax 2 V Vmin 3 V e Voltage at the basis of V212 9 Vyp to 11 Vyp Vmax 3 V Vmin 7 V e Voltage at the collector of V212 17 Vyp to 20 Vyp Vmax 23 V Vmin 5 V e Voltage at the basis of V213 13 Vyp to 17 Vyp Vmax 8 V Vmin 6 V e Voltage at the collector of V213 100 Vyp to 115 Vyp Vmax 115 V Vmin 0 V gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 27 Typical measurement values of the correctly operating final stage DC operating voltage Up 48 V at X205 DC current consumption ly 8 2 A to 8 7 A at X205 Peak collector voltage U 110 V max RMS value of the collector
39. serrated AC voltage of different amplitude and frequency C001 is discharged via the R002 resistor The supply voltage of the control circuit applies between X204 and X205 The two DC voltages of 15 V X206 and 15 V X209 with their reference point X210 are required for the analogous circuits of subassembly A200 and preamplifier They are prepared in the power supply module A100 SK6 3 and SK6 4 The relay contact K001 1 which interrupts the supply of the preamplifier under emergency off condition is connected in series with the positive signal path The DC fan motor M001 is supplied with the negative voltage after a voltage reduction by diode V002 Capacitors and Filters C002 to C019 are applied for certain measures of the RF interference suppression A400 is fed via plug connector SK5 of subassembly A100 At SK4 1 the emergency off switch is connected to 5 V and the power relay K001 to 15 V SK4 4 When the 15 V circuit is interrupted the contact opens and switches off the power of generator A200 The plug connectors SK4 to SK6 are connected electrically in parallel and their common reference point COM lies on the casing potential The remaining part of the circuit was already described in the above description of the sub assembly Finally it is to be mentioned that with any service work particularly care is to be taken to the earthing connections given in the wiring diagram because they are decisive for maintaining the low RF
40. sitive skin hardly feels the heat High frequency heat therapy can by applied in a wide field It is particularly suited for all rheumatic ailments of the joints and muscular system inflammatory ailmants of respiratory organs kidnesy and urinary tracts and all ailments caused by blood circulation For acute conditions the pulsed mode of operation offers advantages gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 8 1 2 Short User Manual 1 2 1 Operation Unit slo 14 16 15 MINUTES WATTS ie 2 3 456 7 8 1110 9 12 13 17 1 Power switch with light indicator RESET key Key Continuous mode of operation with LED b N Key Pulsed mode of operation 70 Hz 2 ms with LED Key Pulsed mode of operation 350 Hz 0 4 ms with LED 6 Key Coil applicator MINODE 8 cm 7 Key Coil applicator MONODE 14 cm gbo Medizintechnik AG 2004 Version 1 2 ULTRATHERM 908i 9 10 11 12 13 14 15 16 17 Key Coil applicator DIPLODE 18 x 39 cm Key Capacitor field applicator 2 4 2 cm and Capacitor field applicator elastic 8 x 12 cm Key Capacitor field applicator 2 8 5 cm Capacitor field applicator elastic 12 x 18 cm Key Capacitor field applicator 2 13 cm Capacitor field applicator elastic 15 x 25 cm Key Decrease treatment time Key Increase treatment time Display treatment time in minutes Display Dosage Display
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