Enraf Nonius Curapuls 670 User manual

Curapuls 670
SERVICE MANUAL
Part number: 1403773

Enraf-Nonius B.V. Curapuls 670 Service Manual 1403773
Index June 19971
Curapuls 670
SERVICE MANUAL
Copyright:
Enraf-Nonius B.V.
P.O.Box 810
2600 AV Delft
The Netherlands
part number: 1403.773-40
PDF master 01042001

Enraf-Nonius B.V. Curapuls 670 Service Manual 1403773
Index June 19972
CONTENTS Date of issue page
1 INTRODUCTION ....................................... Jun. 1997 1-1
1.1 INTRODUCTORY REMARKS ............................ Jun. 1997 1-1
1.2 GENERAL ............................................ Jun. 1997 1-4
1.3 TECHNICAL DATA ..................................... Jun. 1997 1-5
2 DESCRIPTION ........................................ Jun. 1997 2-1
3 TEST EQUIPMENT AND TOOLS ......................... Jun. 1997 3-1
3.1 TEST EQUIPMENT .................................... Jun. 1997 3-1
3.2 TOOLS AND MATERIALS ............................... Jun. 1997 3-1
4 MAINTENANCE ....................................... Jun. 1997 4-1
4.1 GENERAL ............................................ Jun. 1997 4-1
4.2 CHECKLIST .......................................... Jun. 1997 4-1
4.3 FUNCTIONAL TEST .................................... Jun. 1997 4-1
4.4 TROUBLE SHOOTING .................................. Jun. 1997 4-6
4.5 REPLACEMENT PROCEDURES .......................... Jun. 1997 4-8
4.6 ADJUSTMENT PROCEDURES ........................... Jun. 1997 4-10
5 STORAGE AND TRANSPORT ........................... Jun. 1997 5-1
5.1 STORAGE ............................................ Jun. 1997 5-1
5.2 TRANSPORT ......................................... Jun. 1997 5-1
6 SPARE PARTS ........................................ Jun. 1997 6-1
6.1 ORDERING ........................................... Jun. 1997 6-1
6.2 WARRANTY CLAIMS ................................... Jun. 1997 6-1
6.3 REPAIR SERVICE ..................................... Jun. 1997 6-2
6.4 RETURN SHIPMENTS .................................. Jun. 1997 6-2

Enraf-Nonius B.V. Curapuls 670 Service Manual 1403773
Index June 19973
CONTENTS (contd.)
APPENDIX A SPARE PARTS LIST ............................... Jun. 1997 A-1
APPENDIX B DRAWINGS ...................................... Jun. 1997 B-1
Fig. 1 Block diagram .................................. Jun. 1997 B-1
Fig. 2 Curapuls 670 top view ........................... Jun. 1997 B-2
Fig. 3 Curapuls 670 front view .......................... Jun. 1997 B-3
Fig. 4 Chassis front view ............................... Jun. 1997 B-4
Fig. 5 Main PC Board, PCB id: 2558.568 .................. Jun. 1997 B-5
Fig. 6 User interface PC Board, PCB id: 2558.863 .......... Jun. 1997 B-7
Fig. 7 Curapuls 670 power supply check .................. Jun. 1997 B-9
Fig. 8 Curapuls 670 adjustment ......................... Jun. 1997 B-10
Fig. 9 115/220-240 VAC Mains power supply configuration . . . Jun. 1997 B-11
APPENDIX C SERVICE INFO’S (Product Change Notes) ............. Jun. 1997 C-1
C.1 GENERAL ............................................ Jun. 1997 C-1
C.2 REVISION HISTORY ................................... Jun. 1997 C-2

Enraf-Nonius B.V. Curapuls 670 Service Manual 1403773
Index June 19974

Enraf-Nonius B.V. Curapuls 670 Service Manual 1403773
Introduction June 19971-1
1 INTRODUCTION
1.1 INTRODUCTORY REMARKS
This manual has been written for the technicians involved in the service of the
Curapuls 670. Service can be carried out by the service organization of the supplier or
by any other technician authorized by Enraf-Nonius B.V.
The manufacturer will not be held responsible for the results of maintenance or repairs
by unauthorized persons.
Enraf-Nonius B.V. is further referred to as Enraf-Nonius
1.1.1 Safety Aspects
Safe execution of the procedures in this manual requires technical experience and
general knowledge of safety precautions.
Warnings, Cautions and Notes have been used throughout the manual to bring special
matters to the immediate attention of the reader.
- The Warning concerns danger to the safety of the technician or user;
- The Caution draws attention to an action which may damage the equipment;
- The Note points out a statement deserving more emphasis than the general text, but
which does not deserve a Warning or Caution.
Warning: Inside the Curapuls 670 high voltages up to 500V. are present in the
channel selection circuit, beware of electrical shock. Do not touch
components or heat sinks when the cover is removed.
Warning: High power is present in the power amplifier and the 45 volt supply.
Short circuit can give high currents.
Warning: The HF voltages present in the power amplifier can cause heat
sensation and discomfort after long exposure. Adjustment of the coils in
the power amplifier can be done by hand, but we advise to use a plastic
tool for this purpose.
The sequence of steps in a procedure may also be important from the point of view of
personal safety and prevention of damage, therefore never change the sequence of
procedural steps or alter a procedure.
1.1.2 Legal Aspects
This manual and the information herein are copyright property of Enraf-Nonius B.V.
(Delft, The Netherlands).
Enraf-Nonius B.V. disclaims any responsibility for personal injury and/or damage to
equipment caused by:
- Negligence or disregard of a Warning or Caution;

Enraf-Nonius B.V. Curapuls 670 Service Manual 1403773
Introduction June 19971-2
- Deviation from any of the prescribed procedures;
- Execution or activities which are not prescribed;
- Ignorance of the general safety precautions for handling tools and the use of
electricity;
- Repairs and/or adjustments made to the equipment with a patient connected.
1.1.3 Environmental Aspects
The following materials have been used for construction of the Curapuls 670:
- material: Berillicum oxide ( is toxic, this is found inside the power transistors,
do not open the transistor housing)
Please dispose off properly in case of replacement according to the local regulations.
1.1.4 Data registration
1.1.4.1 Equipment and customer registration/Service file
From the point of view of safety and product liability the following data must be
registered for each unit:
- Equipment data: Type (part) and serial number
- Customer data: Date of delivery of the equipment to the customer, name and
full address of the customer
- Configuration file: The actual configuration data of the equipment.
- Service file: Data of all service activities
The distributor as well as their dealer and/or service organization if any, is responsible
for these records. They must be able to provide these data when requested.
1.1.4.2 Configuration file
A configuration file gives the serial numbers and/or batch numbers of main sub-
assemblies and/or important parts per unit. The parts listed in a configuration file are
defined as registered parts. Such are for example parts as transformers, PC Boards,
key-boards and software. The registered parts of the Curapuls 670 are marked with a
"Y" for "Yes" in the spare parts list in appendix A (column C).
Enraf-Nonius has the original configuration file of each unit. Any possible changes in
the original configuration of the supplied units must be filed and the distributor must be
able to provide this data. These changes can simply be stored in the service file of the
specific unit. Part, serial or batch number(s) of the new parts have to be mentioned.
In case of a claim we expect the distributor to report the claim and the actual
configuration data of the equipment in question.

Enraf-Nonius B.V. Curapuls 670 Service Manual 1403773
Introduction June 19971-3
1.1.5 Product documentation
The documentation set for the Curapuls 670 also incudes an Instruction manual and
therapy books. The instruction manual is a recommended item for all service
engineers.
Ordering data:
- 1403.751 Instruction manual
- 1403.773 Service manual
- 1419.767 “Shortwave therapy"
- 1419.781 Service manual “Curamed and Curapuls accessories”
Therapy books:
- 1430.761 “Hoogfrequent Electrotherapie met de Curapuls 670" Dutch language
- 1430.762 “Pulsed short wave therapy with the Curapuls 670" English language
- 1430.763 “Pulsed short wave therapy with the Curapuls 670" German language
- 1430.764 “Pulsed short wave therapy with the Curapuls 670" French language
- 1430.765 “Pulsed short wave therapy with the Curapuls 670" Spanish language
1.1.6 Installation
For installation of the Curapuls 670 see the Operating Instruction manual.
Also:
- It is not allowed to use this unit in so-called "wet rooms" (hydrotherapy rooms).
- The mains supply connections must comply with the national requirements regarding
medical used rooms.
- Before connection of this apparatus to the mains supply, check that the mains
voltage and frequency stated on the type plate of this apparatus correspond to that
of the mains supply. The 220-240V model is intended for nominal mains voltages of
220, 230 or 240 volt. The 115V model is intended for nominal mains voltages of 110
or 120 volt.
- This apparatus must only be connected to a wall socket with protective earth
connection.
- A potential equalisation cable may be connected to this unit if prescribed in the
national regulations.
1.1.7 Modifications
This publication could include technical inaccuracies or typographical errors. Changes
are periodically made to the information herein; these changes will be published as
Service Info's in appendix C of this Service Manual.
1.1.8 Product evaluation
In order to continuously improve the quality of our products, Enraf-Nonius requests her
service organizations to report any structural problem which may be discovered. When
the same problem regularly occurs or when safety problems occur, we would like you to
send us a product complaint report. The report must contain the name, the type of the

Enraf-Nonius B.V. Curapuls 670 Service Manual 1403773
Introduction June 19971-4
product, a detailed description of the problem, the number of the same problems,
quantity of sold equipment and your solution to the problem (if any). The product
complaint report can be found as an enclosure in the Service Reference book.
1.1.9 Additional Information
Please do not hesitate to contact your National sales organisation or distributor.
For additional information:
Enraf-Nonius B.V.
P.O. Box 810
2600 AV Delft
The Netherlands
Tel: +31 (0)15 - 2698400
Fax: +31 (0)15 - 2561686 (Sales Division International)
Technical service support:
Tel: +31 (0)45 - 5276220
Fax: +31 (0)45 - 5259662
E-mail: [email protected]
1.2 GENERAL
The Curapuls 670 is a two channel microprocessor-controlled unit for pulsed shortwave
therapy, applied by means of one or two inductive electrodes (Circuplode).
In the Curapuls 670, pulse duration, pulse frequency, power and treatment duration are
adjustable. When two electrodes are used, the selected pulse frequency and treatment
duration apply to both electrodes, while the other parameters can be set separately for
each electrode.
Simple and safe operation
The various parameters are selected by means of push buttons, and are set using one
central control knob. Each parameter is shown on a LCD display, giving a good
overview of the selected parameters. This is made possible by the application of
microprocessor technology. The microprocessor controls and monitors all functions
during operation. Directly after switching on, the microprocessor automatically tests the
electronics of the Curapuls 670 for safety and correct functioning.
The Curapuls 670 menu can be set in five languages, GB, NL, D, F, E. Changing
languages can be done by pressing the “cursor left”key for approx. 2 sec. in the main
menu. Changing the language (and other default settings) is done by selecting the
option with the “cursor UP or DOWN”keys and rotating the central control.
Pre programmed treatment protocols are available. The treatment protocols are divided
in seven sub-selections. In the sub-selection a treatment can be chosen from a list of
protocols.

Enraf-Nonius B.V. Curapuls 670 Service Manual 1403773
Introduction June 19971-5
Optimum energy transfer
Considerable attention has been paid to the way in which the high-frequency energy is
transferred to the tissue. Continuous microprocessor-controlled fine tuning ensures
optimum adaptation to the tissue characteristics. Special high-output inductive
electrodes have been developed for use with the Curapuls 670. These are of the
’Circuplode’type, and are available in small, large and elliptic treatment areas. They
are provided with screening for the electrical field so that only a magnetic field* is
created.
* a pure angular electric/electromagnetic field
The type of electrode (large/small/elliptic) connected to each channel is recognized
automatically, eliminating the chance of incorrect settings. If the load on the electrode
is insufficient, no power will be supplied. This is indicated by a flashing LED on the
electrode. This form of power transfer indication prevents inefficient treatment, thus
contributing to optimum treatment results.
If treatment on a small part of the body (e.g. the wrist, ankle) is to be done, exact
placement of the Circuplode is of greatest importance for beneficial treatment. In some
cases treatment with a standard Circuplode will not be possible making it necessary to
connect a small Circuplode.
The Curapuls 670 has been designed and manufactured to ensure the highest level of
safety; the unit fully complies with the IEC 601 series safety standards.
1.3 TECHNICAL DATA
1.3.1 General
Mains supply : 110-120 VAC, 220-240 VAC
Permissible mains voltage var. : ±10% (220-240 V)
Mains frequency : 50-60 Hz
Current consumption : max. 3.5 A at 115 V
: max. 1.6 A at 230 V (220-240 V)
Mains fuses : 2 x F 6.3 A 250 V (F, mains entrance)
Internal fuses : T 1A (F1, 18.5V supply)
: T 3.15A (F2, 12V supply)
: T 3.15A (F3, 18.5V supply)
: T 50mA (F4, 160V supply)
: T 20A (F5, 24V supply)
Patient leakage current : typical 2 A (IEC requirement 100 A)
Ditto, single fault condition : typical 2 A (IEC requirement 500 A)
Earth leakage current : typical 250 A (IEC requirement 500 A)
Ditto, single fault condition : typical 450 A (IEC requirement 1000 A)
Earth resistance : 0.03 6(typical) (IEC601 requirement 0.2 6)
Safety class : I 1) type BF 2)
Safety approval : GS Test Mark of TÜV Rheinland 3)
Radio interference suppression : EN60601-1-2
EN50082-2
EN61000-3-2
Dimensions : 39 x 40 x 93 cm
Weight : 45 kg (excluding arm)

Enraf-Nonius B.V. Curapuls 670 Service Manual 1403773
Introduction June 19971-6
Colour specification : EN Custom colours
1) I: The equipment has a safety earth (ground) connection, and must be connected to
a wall socket with protective earth connection.
2) BF: The equipment has a floating patient circuit. The Curapuls 670 meets the
requirements of IEC 601 series safety standards.
3) Copies of certificates or certificates of conformity (COC) are available on request.
1.3.2 European union:
Marking : CE 4)
4) This equipment complies with all requirements of the Medical Device
Directive (93/42/EEC) and with EMC Guideline 89/336/EEC.
1.3.3 Shortwave therapy
Shortwave frequencies : 27.12 MHz ± 0,6 %
Channels : 2
Output pulse duration : 65, 82, 110, 150, 200, 300, 400 s (±5%)
Pulse frequency : 26, 35, 46, 62, 82, 110, 150, 200, 300, 400, 600 and
800 Hz (± 5%) (600 and 800 Hz Circuplode E only,
single use)
Pulse power : 0 - 200 W (±20%) in steps of 5W into 506
Mean power : 0 - 64 W (48 and 64 W Circuplode E only) into 50 6
Contact control threshold level : 80 % of initial value
Timer : 0 - 30 minutes (±5%)

Enraf-Nonius B.V. Curapuls 670 Service Manual 1403773
Description June 19972-1
2 DESCRIPTION
Because of the modular construction of the Curapuls 670 the description is done in
module level. The modules can be found in the block diagram.
2.1 BLOCK DIAGRAM (see appendix B fig. 1)
The electronic circuit of the Curapuls 670 is located on 2 modules:
- Application module HF. (also referred to as main PC Board).
- User interface module (also referred to as user interface PC Board) including LCD
parameter display with backlighting.
Input power and output power devices:
- Mains supply circuit
- Circuplode(s)
2.1.1 Application module HF. (main PC Board)
The function of the application module is to generate the shortwave output power as
specified for the Curapuls 670.
The application module comprises the following circuits:
- AC/DC power supply circuits.
- Fuses
- Processor circuits (P)
- Program memory
- Analogue to digital (AD) and digital to analogue (DA) converters
- Timer circuits,
- VCO circuit
- Measuring circuits
- Monitoring/safety circuits.
- Driver and output stages
Description of the application module:
The functions of the Curapuls 670 are controlled by the microprocessor (P). The P
gathers information about connected electrodes (which type, which channel) and about
the set parameters (pulse duration, pulse frequency, treatment time, intensity etc.). The
software used for these functions is stored in EPROM. Timer circuits are used for
generating treatment parameters and for measuring the output signals. Safety circuits
are applied for checking the safe operation of the Curapuls 670, also is checked that
the output does not exceed maximum values. All signals are generated by the P and
converted by a DA converter to analogue signals. These signals are measured and
converted by a AD converter. This signal is fed back to the P for comparison with the
set parameters and the output is corrected if necessary. The Voltage Controlled
Oscillator (VCO) is also checked for the output frequency which is 27.12 MHz (±0.6%).
The driver and output stages generate the output as specified for the Curapuls 670.

Enraf-Nonius B.V. Curapuls 670 Service Manual 1403773
Description June 19972-2
2.1.2 User interface module (user interface PC Board)
The user interface module enables communication between the application module and
all user controls and display (parameter selection keys and parameter control).
The user Interface module comprises the following circuits:
- Processor circuit (P)
- Program memory
- LCD display
- LCD display back light inverter
- Indication LED
- Parameter selection keys
- Amplitude/parameter control
- Buzzer
Description of the user interface module:
All treatment parameter settings and user actions are checked by theP and program
memory. The selection switches at the front panel and information from the central
control knob are scanned by the P. Also the user actions and the sequence of the
actions are checked before these are executed. The therapy settings are send to the
application module. The parameter settings and treatment time are displayed on the
LCD display .
2.1.3 Mains supply circuit
The mains power is fed into the Curapuls 670 via a mains entrance. Inside the mains
entrance two mains fuses are found. The mains power runs via a mains filter and a
mains switch to the primary side of the mains transformer. The mains power is
transformed into 12V, 18.5V, 18.5V, 24V and 160V and fed into the power supply
section of the main PC Board.
2.1.4 Circuplode(s)
To transmit the HF. power into a patient Circuplodes are used. Available Circuplodes
are Circuplode diam. 90mm, Circuplode diam. 140mm and the Circuplode-E (ellipse
shaped).

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Test equipment and tools June 19973-1
3 TEST EQUIPMENT AND TOOLS
3.1 TEST EQUIPMENT
For the repair and maintenance procedures of the Curapuls 670 the following test
equipment and accessories are required:
- Digital multimeter 3 1/2 digit, accuracy better than 1 %. (2x) For example Fluke 77
- Two beam oscilloscope, >30MHz, accuracy better than 5%. For example Philips PM
3055
- Safety tester according IEC 601-1. For example a Biotek 601 PRO safety tester
- Universal frequency counter 30 MHz. For example Thandar TF 200
3.2 TOOLS AND MATERIALS
It is assumed that a complete set of precision engineering tools is available. For the
service of the Curapuls 670 the following additional tools are required:
- Anti-static bench mat with earthing wire and wrist strap
- Tool for removal of Dual In Line (DIL) integrated circuits, 0.6"
- Dummy load 50 6(2x for burn-in test) Par. No. 0403.801
- Curapuls 403/670 HF power meter Part No. 0403.803
- Coax cable length 0.60 m. 50 6
- Coax cable length 1.50 m. 50 6(2x for burn-in test)
- Miniature screw driver (trim screwdriver), blade 1.4mm.

Enraf-Nonius B.V. Curapuls 670 Service Manual 1403773
Test equipment and tools June 19973-2

Enraf-Nonius B.V. Curapuls 670 Service Manual 1403773
Maintenance June 19974-1
4 MAINTENANCE
4.1 GENERAL
We recommend to check the Curapuls 670 annually.
4.2 CHECKLIST
The following procedures must be carried out during an inspection and/or after every
repair:
4.2.1 Modifications, if any, according to the "Service Info" sheets. See appendix C of this
manual for further information.
4.2.2 Visual inspection. Check the electrical wiring for safety and check that all components
are properly fastened. Check that the fuses have the specified ratings (see par. 1.3.1).
4.2.3 Check that all accessories are in good condition.
4.2.4 Functional test (see chapter 4.3).
4.2.5 File all service activities.
4.3 FUNCTIONAL TEST
4.3.1 Self test
Connect the Curapuls 670 to the mains and switch on the equipment.
The Curapuls 670 will carry out the so-called self test for approx. 10 seconds.
At the end the buzzer sounds (otherwise see par. 4.4.1.2 - 4 ). It is assumed that when
the selftest is passed all functions of the Curapuls 670 are okay.
Switch off the Curapuls 670.
4.3.2 Control panel test
Push and hold depressed the two right-hand switches (enter and start/stop keys) at
control panel simultaneously, during switching on the Curapuls 670 on (see appendix
B, fig. 2).
Release the switches after the “beep”.
Check the switches one by one; each time the buzzer sounds, the switch which is
depressed is shown in the LCD display (otherwise see par. 4.4.1.6).
Check the central control knob, rotating clockwise will move a rectangle from left to right
between the two lines at the bottom of the LCD display. Rotating anti-clockwise will

Enraf-Nonius B.V. Curapuls 670 Service Manual 1403773
Maintenance June 19974-2
move a rectangle right to left between the two lines at the bottom of the LCD display
(otherwise see par. 4.4.1.7).
Entering the service mode:
Testing of other parts of the Curapuls 670 is done in the so called “SERVICE MODE”.
For starting the service mode enter the following key code when in control panel test
mode, press in sequential order the following keys:
2 x cursor up key,
1 x enter key,
1 x cursor down key,
2 x cursor right key.
After entering this code the Curapuls 670 is in service mode. The following options are
displayed:
Test number : test number of the test for the Curapuls 670.
Sub-selection : test sub-selection if available.
Result hex. : test results in hex. if relevant.
Result dec. : test results in dec. if relevant.
Note: Only the tests which are relevant for the functional test are shown below, other
tests are used during production, for diagnostic purposes or used for
adjustment/calibration (see par. 4.6).
Selection of a test number is done by rotating the central control. To start a test press
the start/stop key. When a test is executed the green LED above the start/stop key will
light. Stop a test by pressing the start/stop key again. During execution of a test the
test number can not be changed, first stop a test before changing to an other test.
Note: Leaving the service mode is done by switching off the Curapuls 670.
4.3.3 Main board software version number
Enter the service mode and select test 36
To display the application software version press the start/stop key.
The displayed version is A4 or higher (A = application software Curapuls 670, 4 =
version number).
Stop the test by pressing the start/stop key.
Continue with the next test or leave the service mode by switching off the Curapuls 670.
4.3.4 User interface / language software version number
Enter the service mode and select test 53
The language software version is displayed at “Result hex”on the display.
The user interface software version is displayed a “Result dec”on the display.

Enraf-Nonius B.V. Curapuls 670 Service Manual 1403773
Maintenance June 19974-3
Continue with the next test or leave the service mode by switching off the Curapuls 670.
4.3.5 Display test
Enter the service mode and select test 50
To enter the display test press the start/stop key.
An alternating block-pattern is displayed. Check that no pixels are missing in normal or
inverted mode.
Stop the display test by pressing the start/stop key.
Continue with the next test or leave the service mode by switching off the Curapuls 670.
4.3.6 Watchdog circuit test
Enter the service mode and select test 51
To enter the display watchdog circuit test press the start/stop key.
An error is generated in the watchdog circuit. When an error is found the beeper
sounds alternately and the display will show:
SYSTEM ERROR
043
Main board Error
03
Switch off the Curapuls 670 and continue with the next test by entering the service
mode.
4.3.7 Formatting the EEPROM
Enter the service mode and select test 52
To enter the formatting of the EEPROM press the start/stop key.
During formatting the buzzer sounds.
When the buzzer stops continue with the next test or leave the service mode by
switching off the Curapuls 670.
4.3.8 Circuplode identification test
Enter the service mode and select test 10
Connect a Circuplode to channel A of the Curapuls 670. To enter the identification test
press the start/stop key.
Result hex. display:
00 No Circuplode connected
01 200 Watt Circuplode
02 150 Watt Circuplode
03 100 Watt Circuplode
04 200 Watt / 800 Hz Circuplode E

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Maintenance June 19974-4
05 dummy load
06 short circuit
Stop the identification test by pressing the start/stop key.
Continue with the next test or leave the service mode by switching off the Curapuls 670.
4.3.9 Safety relay test
Enter the service mode and select test 11
This test controls the safety relay and switches it on and off with a frequency of 1 Hz.
The functioning of the relay can be heard by the click-sound inside the housing (see
appendix B, fig. 7). By using a multimeter (DCV) the proper working can be checked at
TP34 (GND) and TP16.
Stop the safety relay test by pressing the start/stop key.
Continue with the next test or leave the service mode by switching off the Curapuls 670.
4.3.10 Channel A function test
Enter the service mode and select test 26
This test generates a low power pulse of 400 us and 100Hz in the output stage. All
circuits are working as in the normal condition, enabling to measure various signals.
Also the frequency is controlled to the resonance frequency.
Connect a Circuplode to Curapuls 670.
The power Result dec. display reads the SWR (ratio Forward / Unreflected).
A good SWR is less than 55H.
The sub-selection numbers are:
Sub-selection: 0 0 Watt more than 55H (unloaded)
1 5 Watt less than 55H (loaded)
2 10 Watt “
3 15 Watt “
4 20 Watt “
When an incorrect SWR value is displayed see par. 4.4.1.8
Stop the channel A function test by pressing the start/stop key.
Continue with the next test or leave the service mode by switching off the Curapuls 670.
4.3.11 Channel B function test
Enter the service mode and select test 27
This test generates a low power pulse of 400 us and 100Hz in the output stage. All
circuits are working as in the normal condition, enabling to measure various signals.
Also the frequency is controlled to the resonance frequency.
Connect a Circuplode to Curapuls 670.
The power Result dec. display reads the SWR (ratio Forward / Unreflected).