Cardioline AR 600 Operating manual

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1
AR600
AR600 ADV
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CARDIOLINE
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is an
et medical d
evices SpA
brand
w w w . c a r d i o l i n e . b i z 
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T
TE EC CH HN NI IC CA AL L S SE ER RV VI IC CE E M MA AN NU UA AL L
E
EL LE EC CT TR RO OC CA AR RD DI IO OG GR RA AP PH H M MO OD DE EL LS S
C
Ca ar rd di io ol li in ne e®
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A AR R 6 60 00 0
P
P/ /N N: : 8 80 04 40 09 95 50 01 1
P
P/ /N N: : 8 80 04 40 09 95 50 02 2
C
Ca ar rd di io ol li in ne e®
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A AR R 6 60 00 0 A AD DV V
P
P/ /N N: : 8 80 04 40 09 95 51 11 1
P
P/ /N N: : 8 80 04 40 09 95 51 12 2

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AR600
AR600 ADV
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CARDIOLINE
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is an
et medical d
evices SpA
brand
w w w . c a r d i o l i n e . b i z 
Index
Introduction and special notes pag. 4
Programming for the installer pag. 4
Serial number pag. 6
Aim of the manual pag. 6
Reference standards pag. 7
Special notes pag. 7
1. Technical characteristics pag. 8
2. Description of the equipment pag. 10
2.1 Casing pag. 10
2.2 Battery pag. 10
2.3 Mother board pag. 10
2.4 Keyboard pag. 11
2.5 Mark sensor board pag. 11
2.6 Printer mechanical assembly complete with thermal head pag. 11
2.7 Paper transport mechanical assembly pag. 11
2.8 Battery charger pag. 11
3. Inputs and outputs pag. 13
3.1 Connection to the patient input socket pag. 13
4. Checking the safety characteristics pag. 14
4.1 Necessary instruments pag. 14
4.2 Testing the applied voltage pag. 14
4.3 Testing the leakage currents pag. 15
5. Checking the main technical features of the electrocardiograph pag. 17
5.1 Necessary instruments pag. 17
5.2 Checking sensitivity pag. 17
5.3 Testing the ECG leads pag. 17
5.4 Checking the paper transport speed pag. 18
5.5 Checking the frequency response pag. 18
5.6 Checking the battery charging system pag. 19
5.7 Self-test to check the printer pag. 19
6. Identifying faulty circuits and analysis of the principal malfunctions pag. 20
6.1 Foreword pag. 20
6.2 Aim pag. 20
6.3 The equipment does not switch on pag. 21
6.4 Illustration of the supply voltages pag. 23
6.5 Malfunctions during printing pag. 25
6.6 Malfunctions caused by faulty paper transport pag. 27
6.7 Malfunctions during page set-up and sensing the presence of paper pag. 29
6.8 Acquisition of the Ecg signal faulty or absent pag. 31
6.9 The equipment does not accept the keyboard commands correctly pag. 32
6.10 Led and/or display fault pag. 33
7. How to disassembly and reassembly the equipment pag. 34
7.1 Introduction pag. 34
7.2 Opening and closing the equipment pag. 34
7.3 Removing the motherboard pag. 34
7.4 Removing the battery pag. 35
7.5 Removing the keyboard board pag. 35
7.6 Removing the paper transport motor assembly pag. 35
7.7 Removing the printer assembly pag. 35
7.8 Removing the mark sensor board pag. 36
7.9 Removing the paper compartment door pag. 36
7.10 Removing and replacing the keyboard plate pag. 36
7.11 Charging the batteries pag. 37

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3
AR600
AR600 ADV
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CARDIOLINE
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is an
et medical d
evices SpA
brand
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8. Calibrations pag. 38
8.1 General information pag. 38
8.2 ECG AR 600 pag. 38
8.3 ECG AR 600 ADV pag. 39
9. General maintenance instructions pag. 41
9.1 Introduction pag. 41
9.2 Principal messages pag. 41
9.3 Inspection frequency pag. 41
9.4 Cleaning the thermal head pag. 42
10. List of spare parts pag. 44
10.1 General information pag. 44
APPENDIX A
Procedures for handling and storing
electronic components sensitive to electrostatic discharge (ESD) pag. 46
Illustrated tables and figures pag. 48

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4
AR600
AR600 ADV
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CARDIOLINE
®
is an
et medical d
evices SpA
brand
w w w . c a r d i o l i n e . b i z 
INTRODUCTION AND SPECIAL NOTES
This equipment, produced in two models without and with display, is a portable electrocardiograph with up to 3 print channels, with
internal battery pack rechargeable with a specific class two battery charger.
The patient input is CF type protected against defibrillation discharges.
This equipment is used with the patient cables not protected against defibrillation supplied by the manufacturer.
The recording may be made using heat-sensitive grid paper in a Z-fold pack or roll.
The equipment has an IR infrared serial interface with the following functions:
Model AR 600 (without display) for:
•Loading the single-language software ( contact et medical devices for available languages).
•Enabling the setup options such as:
-implementation of the number of print channels;
-program for main electrocardiographic parameters measurement ;
-PC archive function;
-PC ECG function.
Model AR 600 ADV for:
•Loading the single-language software ( contact et medical devices for available languages).
•Enabling the setup options such as:
-program for main electrocardiographic parameters measurement ;
-program for diagnostic interpretation of the electrocardiogram;
-PC archive function;
-PC ECG function;
-program for monitoring arrhythmia and/or ST.
PROGRAMMING FOR THE INSTALLER
The equipment is supplied with the firmware in the language requested and the requested options enabled.
Subsequent enabling of the setup options is carried out according to the procedures contemplated and requested et medical devices.
Programming of the equipment in user mode is carried out according to the indications given in the user manual in the section
“configuration of the electrocardiograph”.
Starting of the serial installation of the software is activated within 12 seconds of selecting the command in the “update firmware” service
menu.
Ecg AR 600
The service menu is enabled by setting service mode and then pressing the filter, amplitude and speed keys in sequence and activating
printing, then select and confirm “update firmware”.

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AR600
AR600 ADV
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CARDIOLINE
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is an
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Ecg AR 600 ADV
The service menu is managed on the display.
With the “select” key and the “arrows” key, activate and confirm the menus: 
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1. Language of the print messages;
2. Options supported.
Any Customer who wants to update the firmware of his equipment must communicate the following information to et medical devices spa
1. Part Number;
2. Serial Number;
3. Language;
4. Options requested;
Et Medical Devices will then prepare a package containing:
1. A customized firmware binary file for that particular equipment according to the Customer's requests;
2. A special Applications Software (Loader) to be installed on a PC for managing the updating procedure;
3. Operating Instructions;
4. If necessary, an interface device RS 232 – IR.
The updating procedure performs data transfer through the IR interface between the equipment and a PC according to a proprietary
protocol and, once activated, it is completely clear to the user.
NOTE:
Since the updating phase must never be interrupted for any reason, it is recommended to perform it always with the batteries fully
charged or with the equipment connected to the mains.
At the end of update procedure (indicated by a message on the screen), the equipment restart according to the new configuration.
If the firmware update procedure is not properly ended (indicated by an error message on the screen), the malfunction is almost certainly
due to communication problems. The correct relative positioning between the two IR devices must therefore be checked, bringing them as
close together as possible; eliminate any possible sources of interference (fluorescent lights) and try programming again.
Depending on the stage of the updating procedure at which the interruption occurred, the following cases may be considered:
- the Flash memory containing the firmware has not yet been modified: the equipment switches off and
switches on again exactly as it was before the programming phase.
- part of the Flash memory has been modified: the equipment switches off and switches on again, but,
recognizing that it no longer has a valid code, it automatically prepares for the programming
procedure, attempting to connect via IR with the PC. After a few attempts it switches off, but it is still
possible to try programming again, switching it back on.
In this case, after programming, the speeds and the mark must be calibrated.
SERIAL NUMBER
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The label is divided into three parts:
1 - The top part shows the data concerning the dealer.
2 - The center part shows:
The model (MOD) ________ the year of manufacture ________
The code number (REF) ________ the attention triangle ________
The serial number (SN) ________ CE 470 marking ________
3 - The bottom part shows:
the identification data of the Manufacturer ________
The code number of the model attributed by the Manufacturer ________
NOTE:
Always use the serial number and the code of the equipment in any communications with the Dealer or with the Assistance Service.

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6
AR600
AR600 ADV
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CARDIOLINE
®
is an
et medical d
evices SpA
brand
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CE 0470 marking
The mark of conformity CE 0470 shown on the name label of the device, applied on the bottom of the casing, certifies the conformity of
the device with the essential requirements prescribed in enclosure I of the Directive 93/42/EEC, assimilated in Italy with the Decree Law
No. 46 of 24 February 1997. The number 0470, shown alongside the CE mark, corresponds to the number of the Notified Body responsible
for the application of the procedures contemplated in enclosure V of the Directive 93/42/ EEC. (In the specific case the Notified Body is
NEMKO)
AIM OF THE MANUAL
The aim of this manual is as follows:
a) to give a functional description of the unit;
b) to give a description of the procedures necessary to perform a complete test of the equipment;
c) to give a description of the procedures necessary to perform the safety tests according to the IEC safety standards;
d) to identify and isolate faulty functional blocks;
e) to describe the maintenance jobs necessary for correct and lasting operation of the equipment;
f) to supply the list of spare parts.

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AR600
AR600 ADV
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CARDIOLINE
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REFERENCE STANDARDS
The safety characteristics of the medical electrical class equipment comply with the standards:
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SPECIAL NOTES
a) Remember that correct and efficient maintenance of the equipment and its accessories, following the instructions in this manual,
ensures a long and safe working life of the equipment and its accessories.
b) Remember that this service manual is intended only for competent technical personnel.
c) Remember that all the instrumentation described or indicated in this service manual is necessary for correctly performing tests and
calibrations, and for checking the safety features of the equipment.
d) Remember that, whenever the equipment is opened for inspection or for servicing, a complete check of the safety characteristics must
be made, as described in chapter 4, before it is returned to the user.
e) Remember that this equipment has been designed using CMOS technology.
Most of the electrical components belong to the family of ELECTROSTATIC SENSITIVE DEVICES (ESD).
It is therefore necessary to follow particular working procedures.
The particular procedures required when dealing with electrostatic sensitive devices (E.S.D.) are listed in appendix A.
The manufacturer declines all responsibility for any damage sustained by the equipment, caused by an inadequate or inexistent
working procedure necessary when dealing with E.S.D. devices.
NOTE:
The transport of the equipment in a non original package or packed in an incorrect way, relieves the manufacturer of all
responsibility for damage sustained by the equipment and accessories and renders the guarantee void .
f) This technical assistance manual has been prepared by et medical devices SpA, via De Zinis n. 6 - Cavareno (TN) Italia, which
reserves all rights to modify it without notice and all copyright rights.
g) Read the whole contents of this manual before starting the assistance service.

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8
AR600
AR600 ADV
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CARDIOLINE
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is an
et medical d
evices SpA
brand
w w w . c a r d i o l i n e . b i z 
1. TECHNICAL CHARACTERISTICS
Mains power supply Device with power supply specified class II (second) REF
type: 6308.
Maximum absorption 100 mA at 117 V~ ± 10%
50 mA at 230 V~ ± 10%
Mains power supply protection Fuse: T 0.5 A
Internal electrical source Set of rechargeable NiMH batteries
8 x 1.2 Vdc 1500 mAh
Battery protection PolySwitch 1.5 A - 40 °C in ambient conditions
Internal power supply protection Pico fuse SHF SLO-BLO T 2 A Littelfuse
Applied part CF type
Protection against defibrillation Internal
Input dynamics ± 300 mV @ 0 Hz.
± 5 mV in the bandwidth
Input impedance > 100 Mohm on each electrode
Common mode rejection > 90 dB
Frequency response 0.5 to 150 Hz (-3dB) with anti-drift filter
Time constant 3.3 seconds
Acquisition 11 bits
1000
0500 samples/sec/channel in calculation and filters
Resolution 5µV/bit
Leads 12 STANDARD leads
12 CABRERA leads (AR 600 ADV)
acquired 8
reconstructed 4 (III - aVR - aVL - aVF)
Signal memory 10 seconds for each lead in auto isochronous
Sensitivity of recording:
manual
automatic
5 – 10 – 20 mm/mV ± 5%
depends on the number of channels being printed
2.5 – 5 – 10 – 20 mm/mV ± 5%
Writing system Thermal printer, 8 dots/mm
Usable print height 50 mm
Print channels 1 – 2 – 3
Paper transport speed 25 - 50 mm/s ± 5%
Heat-sensitive paper Dot Card® in rolls : height 60 mm, length 15 m, gridded
Dot Card® pack of Z-Fold : length 20 m, page 70x60 mm,
gridded
Filters Mains disturbances:
Digital filter notch modified 50 – 60 Hz with 32Hz -3db
response to linear phase – switch on/switch off filter
Anti drift:
Digital filter 0.5Hz high pass with linear phase, always
enabled and cannot be switched off
Serial interface Infrared
Keyboard AR 600 Membrane type with 9 function and number with 13 LED
function indicators

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9
AR600
AR600 ADV
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CARDIOLINE
®
is an
et medical d
evices SpA
brand
w w w . c a r d i o l i n e . b i z 

Keyboard AR 600 ADV Membrane type with 11 function keys, 10 alphanumeric keys
and 1 LED function indicator
Display AR 600 ADV graphic LCD 120x32 dots, rear-lit
Interpretation program
(optional)
Interpretation ECG HES (AR 600 ADV):
Developed by the Medizinische Hochschule Hannover
Calculate parameters:
Developed at the Institute of Clinical Physiology (National
Research Council), Pisa - Italy
Operating modes Manual: real time acquisition
Automatic: isochronous
Autonomy Internal set of batteries:
3 hours in 1 channel mode
10 mm/mV
25 mm/sec.
10 Hz p.v.
Recharging time Internal set of batteries: 14 hours 100%
Degree of protection of the casing IP20
Ambient conditions:
Operation
Transport and storage
Ambient temperature: from +10°C to +40°C
Relative humidity: from 25% to 95% (without condensation)
Atmospheric pressure: from 700 hPa to 1060 hPa
Ambient temperature: from -10°C to +40°C
Relative humidity: from 10% to 95% (without condensation)
Atmospheric pressure: from 500 hPa to 1060 hPa
Dimensions 250 x 60 x 185 mm (length x height x depth)
Weight 1000 grams with batteries, without paper
Conformity to standards EN 60601-1: 1990
EN 60601-1/A1: 1992
EN 60601-1/A2: 1995
EN 60601-1/A13: 1995
General standards for safety of electromedical equipment
EN 60601-1-2: 1993
Standards on electromagnetic compatibility of medical
equipment.
EN 60601-2-25: 1995
Particular safety standards for electrocardiographs
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2. DESCRIPTION OF THE EQUIPMENT
All the internal parts of the equipment must be considered an applied part.
The equipment is composed of the following main elements:
- casing complete with paper compartment door, battery compartment door, keyboard plate and screen printing;
- set of 8 NiMH batteries, 9.6 Volt;
- principal electronic board referred to below as the “mother board”;
- keyboard board;
- mark sensor board;
- printer mechanical assembly complete with thermal head;
- paper transport mechanical assembly;
- battery charging assembly outside the equipment.
2.1 CASING
The casing is made of polycarbonate Lexan 940 color RAL 7035.
2.2 BATTERY
Set of NiMH batteries with the following characteristics:
- the set of batteries is protected against short circuits by a 1.5 A poly switch with self reset;
- voltage 9.6 Vdc;
- capacity 1500 mAh;
- type supplied by the manufacturer of the equipment.
NOTE ON SAFETY
The battery may be replaced only with the type supplied as a spare by the manufacturer.
2.3 MOTHER BOARD
This is a multilayer printed circuit board (four layers) in “fine-line” technology for mounting SMD (Surface Mounting Devices)
components.
It houses most of the equipment's electronic circuits. It may be subdivided into the following sections according to the electric block
diagram with file name: TOP_LEVEL (I series) and 60_COMPL_II SERIE.
2.3.1 Section on battery charging
The section on battery charging is composed of two parts:
•an external part with a mains adapter AC/AC, 230/14.5 Vac or 115/14.5 Vac, protected by a fuse for short circuits and by PTC against
overheating;
•a part inside the equipment fed with 14.5 Vac composed of the following circuits:
-rectifying, filtering and current limiting circuits.
These circuits do not allow operation of the equipment with the batteries run down or
absent.
2.3.2 Section on the power supply to internal circuits
It is composed of the following power supplies:
•+5 V generated by a linear voltage regulator which feeds the control logic;
•± 5 VI – VL for supplying power to the patient input analog circuits on the hybrid circuit;
•+ 3.3 V generated by a linear regulator for supplying power to the analog/digital converter built into the microprocessor;
•+ 3 V reference voltage for the A/D converter.
•VTPH voltage obtained from the battery for feeding the thermal head. This voltage is limited in current to 2 A (± 0.2 A) and stabilized
in voltage at + 7.5 V (± 0.5 V).

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2.4 KEYBOARD
AR 600
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AR 600 ADV
Contains 21 keys, 1 LED, 1 rear-lit liquid crystal display, graphic type, and the circuits for communication with the microprocessor by
dedicated serial line.
2.5 MARK SENSOR BOARD
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2.6 PRINTER MECHANICAL ASSEMBLY COMPLETE WITH THERMAL HEAD
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The complete assembly is supplied as a spare part.
2.7 PAPER TRANSPORT MECHANICAL ASSEMBLY
Composed of the transport motor complete with support and gears.
The complete assembly is supplied as a spare part.
2.8 BATTERY CHARGER
The accessory defined as a battery charger is an AC/AC mains adapter, class II (second class),
230V~/14.4V~ or 115V~/14.5V~ which guarantees the insulation of the electrocardiograph with respect
to the mains and feeds its battery charging circuit.
IMPORTANT SAFETY WARNINGS
The battery charger is a specific accessory that complements the electrocardiograph with the particular function of ensuring the electrical
insulation of the patient and the operator with respect to the mains, when connected.
For this reason, as well as guaranteeing the operation of the equipment, it has an essential safety function.
Other similar accessories MUST NOT be used; the manufacturer declines all responsibility for damage due to tampering.
The battery charger is a class II power supply and does not require ground connection of the electrical system
PRECAUTIONS FOR USE
•The battery charger can be damaged if dropped, struck or tampered with.
•Do not immerse in water or other liquids;
•When using it, do not place it on or near sources of heat.
•Do not damage the cables for connection to the mains and to the electrocardiograph
•Do not use or connect the electrocardiograph differently from the specifications.
•Use the battery charger only at the specified mains voltage.

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3. INPUTS AND OUTPUTS
AR 600 – AR 600 ADV do not allow direct connections by cable to external equipments, but only with
the use of IR infrared serial connection.
3.1 CONNECTION TO THE PATIENT INPUT SOCKET (table T1)
841
2
3
6
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15 9
10
11
12
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Socket seen from the connection side
Pin 1 = IN C2 (electrode C2)
Pin 2 = IN C3 (electrode C3)
Pin 3 = IN C4 (electrode C4)
Pin 4 = IN C5 (electrode C5)
Pin 5 = IN C6 (electrode C6)
Pin 6 = AGND (analog ground)
Pin 7 = PAT5_10 (patient cable recognition line 5 – 10 electrodes)
Pin 8 = DGND (digital ground)
Pin 9 = IN R (electrode R)
Pin 10 = IN L (electrode L)
Pin 11 = IN F (electrode F)
Pin 12 = IN C1 (electrode C1)
Pin 13 = NC (not connected)
Pin 14 = IN N (electrode N)
Pin 15 = NC (not connected)
The inputs have the following characteristics:
a) Sensitivity 1 mV/ 5 - 10 - 20 mm. depending on the sensitivity selected and 1 mV/2.5 mm with automatic sensitivity;
b) Input impedance greater than 100 MOhm each electrode;
c) Input dynamics +/- 300 mV at 0 Hz.
+/- 5 mV in the bandwidth;
d) The inputs are protected against defibrillation

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4. CHECKING THE SAFETY CHARACTERISTICS
The safety standard requires two important tests:
a) The applied voltage test:
checks the efficiency of the insulation of the feeding circuits and of the circuits for connections with the patient.
b) Testing of the leakage currents:
measures the value of the leakage currents with relation to patient and operator safety.
c) The equipment examined is composed of an external battery charger which can remain connected to the electrocardiograph connected
to the patient.
The insulation of the battery charger, between the mains supply and the socket for connection to the electrocardiograph, is ensured in
class II (second class).
The electrocardiograph is type CF.
NOTE:
All the safety tests must be carried out according to standards EN 60601-1 (1990 paragraphs 19 - 20) EN 60601-2-25 (1995).
4.1 NECESSARY INSTRUMENTS
a) Instrument for testing dielectric rigidity:
Manufacturer R/B model "UH28 M" Elektrotechn. Laboratorium D - 7015 Korntal Germany or equivalent;
b) Instrument for measuring leakage currents:
model “AMPLAID ST 10“ - Division Amplifon S.p.A. Italy, or
model METRON QA 80” Electrical Safety Analyser, or
model “BIO-TEK 601-PRO” Division Amplisim srl - Italy or equivalents.
4.2 TESTING THE APPLIED VOLTAGE
The test must be performed in a suitable room complying with safety standards using the instrument 4.1 a).
4.2.1 Testing the equipment connected to the battery charger
a) Apply the test voltage between all the pins of the patient connector and the pins of the mains plug of the battery charger connected to
the electrocardiograph, see table T3.
b) Test procedure:
(class II electrocardiograph (second class).
Apply a test voltage of 2 KVac for 10 seconds, then raise it to 4 KVac and keep it at this value for 1 minute. Then decrease it
gradually within 10 seconds.
c) Apply the test voltage between all the pins of the patient connector and a metal sheet with maximum
dimensions 20x10 cm, pressed against the casing of the equipment, which is shifted in such a way as
to control all the parts of the outer surface of the casing.
Test procedure : (type CF electrocardiograph).
Apply a test voltage of 0.750 KVac for 10 seconds, then raise it to 1.5 KVac and keep it at this value for 1 minute. Then decrease it
gradually within 10 seconds.

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4.2.2 WARNINGS
Check that no superficial or destructive discharges are noted during the test.
Slight discharges due to a corona effect may be overlooked, as long as they stop when the voltage is temporarily lowered to a lower value,
which must however remain higher than the reference voltage U (250V), on condition that the discharges do not cause drops in the test
voltage.
Battery charger
The battery charger is impregnated on the inside with polyurethane resin, so it is not repairable.
So the test of dielectric rigidity between the applied part of the ECG and the mains must not be
repeated, unless in the case of particular requirements.
Electrocardiograph
Performing the test between the applied part and the metal sheet in contact with the equipment is
advised in the case of repairs.
4.3 TESTING THE LEAKAGE CURRENTS
THIS TEST MUST BE PERFORMED AFTER EACH OPENING FOR INSPECTION AND/OR REPAIR USING THE
INSTRUMENT 4.1 b AND IN ANY CASE EVERY TWO YEARS.
Proceed as follows:
4.3.1 Connect the electrocardiograph connected to the battery charger to the measuring instrument following the instructions in the user
manual of the instrument, remembering that:
a) The leakage current towards the casing is measured between the mains power supply circuits and a metal sheet with dimensions no
larger than 20 x 10 cm. which must be pressed against the casing of the equipment and of the battery charger together, see Fig. 18.
b) The leakage current to the patient is measured between the mains and the applied part, see Fig. 20.
For the connection with the applied part, use the same patient cable.
c) The leakage current to the patient with mains voltage directly on the applied part (first fault condition) is measured between the metal
sheet connected to the equipment and to the battery charger together and the applied part, see Fig. 21.
d) The auxiliary current to the patient is measured individually on each electrode (except the black one) with respect to all the other
electrodes connected together, see Fig. 26.
4.3.2 Set the measuring instrument according to the type (CF) and the class II (second) of the electrocardiograph.
4.3.3 Take the measurement following the indications in the user manual of the instrument and check that the values of the leakage
currents measured are less than or equal to those given in table IV.

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Table IV
Permanent admissible values of the leakage currents and of the auxiliary currents to the patient in mA (milliamperes).
Current pathway CF type
N.C.(+) S.F.C.(++)
Leakage current to casing 0.1 0.5
Leakage current to patient 0.01 0.05
Leakage current to patient with
(mains voltage in the applied part) ----- 0.05
Auxiliary current to patient 0.01 0.05
(+) N.C. = Normal condition
(++) S.F.C. = First fault condition
NOTE:
For the measuring system and the figures mentioned, refer to the standards:
EN 60601-1: (1990) and EN 60601-2-25: (1995) paragraph 19.

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5. CHECKING THE MAIN TECHNICAL FEATURES OF THE ELECTROCARDIOGRAPH
5.1 NECESSARY INSTRUMENTS:
a) sample mV generator with the following characteristics:
- pulse amplitude: 1mV +/- 3%;
- pulse repetition frequency: 1 Hz;
- frequency tolerance: +/- 1%;
- max rising time: 1 ms.
b) low frequency sinusoidal functions generator;
c) ECG simulator.
5.2 SENSITIVITY TEST
Proceed as follows:
a) prepare the equipment for recording of 1 channel on the lead V1 with sensitivity 20 mm/mV.;
b) connect the patient cable to the equipment;
c) connect to the positive pole of the instrument 5.1 a) the terminal C1 of the patient cable connected to the equipment;
d) connect all the other terminals of the cable to the negative pole of the instrument 5.1 a);
e) make a recording for a few seconds;
f) check that the recorded signal has an amplitude of 20mm. +/- 5% on all the channels (Reference: Standards EN 60601-3-2/Ed. 1);
5.3 TESTING THE ECG LEADS
Proceed as follows:
a) switch on the equipment;
b) connect the patient cable to the equipment;
c) connect the red terminal of the patient cable to the positive pole of the instrument in point 5.1.a and the remaining terminals to the
negative pole.
Start the recording and check that the amplitude in mm of the signal and its polarity (positive or negative) comply with the values listed
in table 5.3.
d) repeat the measurement in sequence with the remaining active terminals G - V - C1 - C2 - C3 - C4 - C5 - C6 of the patient cable with
the same procedures as in point c) and check the correspondence with the values listed in table 5.3.

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4!4 4!4 4!4
:
* A0*

A0*

9 9 A0*

4!4

4!4

4!4

4!4 4!4 4!4
20
* * * * * * A0*

* * * * *
2@
* * * * * * * A0*

* * * *
24
* * * * * * * * A0*

* * *
28
* * * * * * * * * A0* * *
29
* * * * * * * * * * A0* *
2)
* * * * * * * * * * * A0*
TABLE 5.3
5.4 CHECKING THE PAPER TRANSPORT SPEED
Proceed as follows:
a) switch on the equipment and connect the patient cable;
b) connect to the positive pole of the instrument 5.1 a) the terminal C1 of the patient cable;
c) connect all the other terminals to the negative pole of the instrument 5.1 a);
d) using the instrument with a square wave of 1Hz and an amplitude of 1 mVpp;
e) record the signal on the lead V1;
f) measure the length of the wave period recorded on the paper.
It must give:
Period = 50 mm +/- 5% for speed 50 mm/s;
Period = 25 mm +/- 5% for speed 25 mm/s;
5.5 CHECKING THE FREQUENCY RESPONSE
Proceed as follows:
a) switch on the equipment and connect the patient cable;
b) connect to the positive pole of the instrument 5.1 b) the terminal C1 of the patient cable;
c) connect all the other terminals to the negative pole of the instrument 5.1 b);
d) set the generator for a 10Hz sinusoidal wave with an amplitude of about 1mVpp.;
e) select the lead V1 and the sensitivity 10 mm/mV.;
f) make a recording and regulate the generator amplitude so as to obtain a 10mm excursion of the recorded signal;
h) vary the generator frequency from 0.5Hz to 100Hz with a constant amplitude;
g) check that the frequency response agrees with table 5.5.

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18
AR600
AR600 ADV
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CARDIOLINE
®
is an
et medical d
evices SpA
brand
w w w . c a r d i o l i n e . b i z 
Signal amplitude in
mVpv
Sinusoidal input signal in Hz
without filter
Tolerance for the signal
10 Hz – 10 mm
1 From 0.67 to 40 ±10%
1 From 40 to 100 + 10% - 30%
0.5 From 100 to 150 + 10% - 30%
Table 5.5
NOTE:
- The anti-drift filter is of the digital type, 0.5 Hz high pass with linear phase, it is always switched on
and cannot be switched off.
- The 50 or 60 Hz filter eliminates mains disturbances of a notch modified digital type, with linear
phase, it has a frequency response of 32 Hz –3dB.
5.6 CHECKING THE NiMH BATTERY CHARGING SYSTEM
5.6.1 Checking current limitation.
a) Remove the set of batteries from the equipment as described in chapter 7.4.
b) In the place of the battery, connect an ammeter, respecting the polarities with full-scale value 1 A.
Feed the equipment with the battery charger and check that the current measured is 150 mA ±15%.
5.6.2 Checking the low battery indications.
a) Remove the set of batteries from the equipment as described in chapter 7.4.
b) In the place of the set of batteries, connect a d.c. power supply able to supply 5 A d.c. with a variable voltage from 0 to 15 Volt d.c. ,
taking care to respect the polarities.
Switch on the equipment with a power supply of 10 Vdc, then slowly lower the voltage to 8.6 Vdc ±2%; the yellow LED indicating
low battery begins to flash.
Lower the voltage to 8.0 Vdc ±2%, the yellow LED remains lit.
In this state the battery is completely run down.
5.7 SELF-TEST TO CHECK THE PRINTER
The self-test is activated from the user menu.
The printout obtained shows the alphanumeric characters, a triangular wave form to check the efficiency of the print head and of the
signals with steps of 1 impulse per second for checking the two paper transport speeds 25 – 50 mm/sec.

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19
AR600
AR600 ADV
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CARDIOLINE
®
is an
et medical d
evices SpA
brand
w w w . c a r d i o l i n e . b i z 
6. IDENTIFYING FAULTY CIRCUITS AND ANALYSIS OF THE PRINCIPAL MALFUNCTIONS
6.1 FOREWORD
With the introduction of SMT technology (Surface Mounting Technology) and of “fine line” multilayer printed circuits, it is extremely
difficult to find and repair the fault even with suitable equipment.
It is therefore advised not to attempt to repair the individual boards, but to replace them. An unsuitable intervention often prevents any
possibility of repair when sent back to the factory.
6.2 AIM
The aim of this chapter is to provide the repairer with useful information for identifying the board and/or assembly that is not working.
For this purpose the analysis of the possible malfunctions or faults is summed up in flow charts and then developed in detail according to
the circuit logic given in the general block diagram of the equipment and of the mother board.

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20
AR600
AR600 ADV
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

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CARDIOLINE
®
is an
et medical d
evices SpA
brand
w w w . c a r d i o l i n e . b i z 
6.3 THE EQUIPMENT DOES NOT SWITCH ON, FLOW ANALYSIS AND TECHNICAL DESCRIPTION
(see wiring diagram, file name POWER_SUPPLY)
EQUIPMENT DOES
NOT START
Verify max current flow 1,5 A
d.c.
Verify battery conditions
FAIL
GOOD
GOOD
FAIL
Replace battery
Verify blown fuse cause
Verify 13 V~
battery charger
FAIL
Replace battery
charger
GOOD
Battery charger
connected
Verify power supply voltage
(See par. 6.4)
Replace fuse
Eliminate faulty conditions
FAIL
Replace or fix mother
board FAIL
Verify ON/OFF circuits
Verify fuse TEA across
battery
Battery mode
Verify rectifier circuits and
current limiter