Contec 300G User manual

300G CONTEC ECG - 3 channel with 12-leads monitor
USER MANUAL
CONTEC MEDICAL SYSTEMS CO., LTD
No. 112 Qinhuang West Street, Economic & Technical Development Zone,
Qinhuangdao, Hebei Province, PEOPLE'S REPUBLIC OF CHINA
Shanghai International Holding Corp. GmbH (Europe)
Eiffestrasse 80, 20537, Hamburg, Germany
33221
ATTENTION: The operators must carefully read and
completely understand the present manual before using the
product.

User Manual
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Statement
Our company owns all rights to this unpublished work and intends to maintain this work as
confidential. We may also seek to maintain this work as an unpublished copyright. This
publication is to be used solely for the purpose of reference, operation, maintenance, or repair
of our equipment. No part of this can be disseminated for other purposes.
In the event of inadvertent or deliberate publication, our company intends to enforce its rights to
this work under copyright laws as a published work. Those having access to this work may not
copy, use, or disclose the information in this work unless expressly authorized by us to do so.
All information contained in this publication is believed to be correct. Our company shall not be
liable for consequential damages in connection with the furnishing, performance, or use of this
material. This publication may refer to information and protected by copyrights or patents and
does not convey any license under the patent rights of our company, nor the rights of others.
Our company does not assume any liability for arising out of any infringements of patents or
other rights of the third parties.
Content of this manual is subject to change without prior notice.

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Contents
Chapter 1 Main Technical Specification.....................................................................................1
Chapter 2 Security Notice..........................................................................................................3
Chapter 3 Maintenance Regulation ...........................................................................................5
Chapter 4 Instrument Characteristics........................................................................................6
Chapter 5 ECG300G Panel Sketch Map...................................................................................8
5.1 The Sketch Map and Components Name.......................................................................8
5.2 Key Definition ..................................................................................................................9
5.3 Indicator Definition.........................................................................................................10
Chapter 6 Attention before Operating......................................................................................11
Chapter 7 Preparation Work before Instrumentation...............................................................12
Chapter 8 Precaution during Operation...................................................................................13
Chapter 9 Instruction of Recording Paper ...............................................................................14
Chapter 10 Electrode Placement.............................................................................................15
10.1 Chest Electrode...........................................................................................................15
10.2 Limb Electrode.............................................................................................................15
10.3 Check-List for Electrode Connection and ECG cable.................................................16
Chapter 11 Grounding and Power Connection of Instrument..................................................17
Chapter 12 Precaution for Battery Operation..........................................................................18
Chapter 13 Control Panel and Key Instruction........................................................................19
13.1 Main Interface..............................................................................................................19
13.2 Sampling Interface ......................................................................................................20
13.3 InputingArchive Information........................................................................................22
13.4 HistoryArchive Management......................................................................................23
13.5 Archive Querying.........................................................................................................24
13.6 Archive Review............................................................................................................25
13.7 Date and Time Settings...............................................................................................26
13.8 System Settings...........................................................................................................26
13.9 Sampling Settings .......................................................................................................27
13.10 Analysing Parameter Settings...................................................................................28
13.11 Print Settings .............................................................................................................28
13.12 Checking Electrodes Placement...............................................................................29
13.13 About Us....................................................................................................................30
Chapter 14 Troubleshooting.....................................................................................................31
14.1 Turn off Automatically..................................................................................................31
14.2 AC Interference............................................................................................................31
14.3 EMG Interference........................................................................................................31
14.4 Baseline Drift...............................................................................................................32
14.5 Troubleshooting List....................................................................................................32
Chapter 15 Maintenance and Preservation.............................................................................33
Appendix.....................................................................................................................................34

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Chapter 1 Main Technical Specification
1.1 Normal work environment
Operation
a) Environment temperature: +5℃~ +35℃
b) Relative humidity: ≤80%
c) Power supply: AC:100-240V, 50/60Hz
DC: 7.4V, 3700 mAh rechargeable lithium battery
d) Atmospheric pressure: 860hPa~1060hPa
Store and Transportation
a) Environment temperature: -40℃~55℃
b) Relative humidity: ≤95%
c) Atmospheric pressure: 500hPa~1060hPa
1.2 Input way: Floating and defibrillation protection
1.3 Lead: Standard 12 leads
1.4 Patient leak current: <10µA
1.5 Input impedance: ≥50MΩ
1.6 Frequency response: 0.05Hz~150Hz(-3dB~dB)
1.7 Time constant: Time constant>3.2s
1.8 CMRR: >60dB, >100dB( With AC filter)
1.9 EMG interference filter: 25/35Hz(-3dB)
1.10 Recording way: Thermal printing system
1.11 Specification of recording paper: 80mm(W)*20m(L) High-speed thermal paper
1.12 Paper speed:
Auto-record:25mm/s,50mm/s,error: ±5%
Rhythm record:25mm/s,50mm/s,error: ±5%
Manual-record:5mm/s,6.25mm/s,10mm/s,12.5mm/s,25mm/s,50mm/s,error:±5%
1.13 Sensitivity choice: 2.5/5/10/20/40mm/mV, error:±5%.Standard sensitivity
is10mm/mV±0.2mm/mV
1.14 Auto-record: record following the record format and auto-mode, auto leads-changing, auto
measurement and analyse.
1.15 Rhythm record: record following the rhythm format and rhythm mode, auto measurement
and analyse.
1.16 Manual record: record following the record format, manual leads-changing.
1.17 Measurement parameters: HR, P-R interval, P Duration, QRS Duration, T Duration, Q-T
interval, Q-Tc, PAxis, QRS Axis, TAxis, R(V5), S(V1), R(V5)+S(V1)
1.18 Product safety type: Class I, Type CF, there is defibrillation and pacing protection circuit.
1.19 Enduring polarization voltage:±300mV
1.20 Noise level: ≤15µVp-p

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1.21 Fuse Specification: 2 pcs φ5*20mm AC time lag: T1.6AL250V
1.22 Size: 315mm(L)*215mm(W)*77mm(H)
1.23 Net Weight: 1.6Kg

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Chapter 2 Security Notice
2.1 The power supply should be grounded properly before operation.
2.2 If the ground cable is not integrated, the device must be run with built-in power supply.
2.3 Please pull out power supply plug before changing the fuse.
2.4 This device must be operated and preserved by professional personnel.
2.5 The operator must read this user manual carefully before operation, and operate the device
according to operation regulation strictly.
2.6 The design of this device has mature consideration of security, but operator should never
neglect attention to device state and patient’s situation.
2.7 Please turn off the instrument and pull out power supply plug before clean and disinfection.
2.8 Please don’t operate this device in environment which contains flammable anaesthesia gas.
2.9 If this device is used with cardiac defibrillator or other electric stimulate devices at the same
time,
please choose Ag/AgCl chloride chest electrode and ECG lead with prevent-fibrillation function.
To
prevent the metal electrode burn patients' skin, the disposable chest electrode should be used if
the
defibrillation time is over 55 seconds. It is better that do not use this device with other electric
stimulate devices at the same time. If it must be used at the same time, there must be
professional technician guide on the scene.
2.10 When other devices are connected with this ECG instrument, they must be Type I devices
which accord with IEC60601-1. Because the total amount of leakage current may hurt patients,
the monitoring of leakage current is carried out and taken charge by connect devices.
2.11 Following descriptions concern special attentions in ECG measurement and interpretation.
(1) P wave and Q wave are not always reliable in the archive of intensive muscle artifact or AC
interference. So are the ST segment and T wave.
(2) Winding and unclear ends of S wave and T wave may lead to tolerance in measurement.
(3) In archive R wave is left out due to the low voltage of QRS wave or any leads falling off, the
measured heart rate may deviate greatly from the correct one.
(4) Axis calculation and identify the QRS borderline are not always reliable in the archive of the
low voltage of QRS wave.
(5) Occasionally, frequent ventricular premature complexes may be identified as dominant
beat.
(6) Merging of versatile arrhythmia may result in untrustworthy measurement because of the
difficulty in distinguishing P wave in such situation.
(7) ECG300G is designed to carry on ECG trace interpretation immediately after the
measurement. It is this interpretation that does not give report on all possible heart
problems and may sometimes not comply with the doctor’s diagnosis. Therefore, the final

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conclusion concerning each patient is up to the doctor basing on patient symptom, the unit
ECG300G ’s interpretation and other examination.

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Chapter 3 Maintenance Regulation
3.1 Under the condition of normal use according to the user manual and operation notice, if this
instrument has any problem, please contact with our customer service department. Our
company has the sales record and customer archives for each instrument. The customer has
one year's warranty service from the beginning of shipping date according to the below time
and condition. To supply all-around and fast maintenance service to our customers, please mail
the maintenance card to us in time.
3.2 Our company may adopt the ways of instruction, mailing to company by courier, visiting
customers' company, etc. to carry out the maintenance promise.
3.3 Even in the period of free maintenance, we charge for reparation in the following archives:
1) Faults or damnification caused by misuse because not operate according to user manual
and operation notice.
2) Faults or damnification caused by dropping accidently when users move after purchasing.
3) Faults or damnification caused by preparation, reconstruction, decomposition, etc. outside
of our company.
4) Faults or damnification caused by natural disasters such as fire, flood, earthquake, etc.
5) Faults or damnification caused by unapt thermal recording paper.
3.4 The free maintenance period for spare parts and fray parts is half a year. Power cable,
recording paper, operation manual and packing material are excluded.
3.5 Our company is not responsible for the faults of other connecting instruments cause by the
faults of this device directly or indirectly.
3.6 The maintenance service is only efficient in Chinese Mainland.
3.7 The free maintenance service will be canceled if we find the protection label has been
destroyed.
3.8 For charge maintenance beyond the warranty period, our company advise to continue to
use "Maintenance contract regulation". Please consult our customer service department for
specific situation.

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Chapter 4 Instrument Characteristics
4.1 Recording system: Thermal-array (8 dots/mm),you should not adjust anything Frequency
Response is up to 150Hz.
4.2 The device can record real time clear and exact three channel ECG waveform and remark
continually. The remark includes: lead sign, sensitivity, paper speed, filter state, etc.
4.3 Under automatic mode, just press the button once, it starts record procedure, which can
enhance your
work efficiency.
4.4 Soft keyboard control, more convenient for operation. TFT screen shows the working status,
more clear for observation.
4.5 Safety Class: Class I, Type CF.
4.6 The power supply includes both AC/DC. This device includes built-in lithium rechargeable
battery,
4.7 This instrument can record 150 pieces of ECG waveform and print 90 minutes continually
under the best DC state.
4.8 This instrument can store more than 1000 pieces patient’s data, more convenient for data
review and statistic.
4.9 The figure of whole device is elegant and gliding.
4.10 According to defense degree of deleterious fluid, this device belongs to common device.
4.11 According to the safe degree used under the condition with flammable anaesthesia gas
mixed with
air (or oxygen, nitrous oxide), this device belongs to the device which can’t be used under the
condition
with flammable anaesthesia gas mixed with air(or oxygen, nitrous oxide).
4.12 Digital signal processor for effective inhibition of baseline drift, interference, and the like.
4.13 The instrument has function with regular auto-measurement of ECG waveform parameter,
auto-analyze and auto-diagnostic, it will help to reduce doctor’s burden and improve working
efficiency.
4.14 According to the working mode class, this device belongs to non-continuous working
device.
4.15 Explanation of some symbols in this device:
～AC AC work mode
OFF Power supply is disconnected
ON Power supply is connected
Equipotential point
Places need to be noticed, please refer to user manual

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Device type is CF, which has defibrillation protection function
USB connector
PATIENT Lead connector

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Chapter 5 ECG300G Panel Sketch Map
5.1 The Sketch Map and Components Name
Front view
Side view

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Rear view
Bottom view
5.2 Key Definition
Function key: on/off
Function key: plus adjust
Function key: paper speed adjust
Function key: filter function select
Function key: menu
Function key: switch printing mode
Function key:1mV marker
Fuse Holder
Power Switch Power Plug Equipotential Terminal

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Function key: print
Function key: enter
Function key: upwards
Function key: downwards
Function key: leftwards
Function key: rightwards
5.3 Indicator Definition
The indicator turns green when there is AC power supply, and when the indicator turns
green and red same time it is being recharged.
Indicator for instrument when power on.

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Chapter 6 Attention before Operating
6.1 You are required to read this operation manual carefully before operating so as to ensure
taking safe and effective operation of the instrument.
6.2 Installation and maintenance of the instrument should be carried out as the following
1) There should be no high voltage cable, X radial instrument, ultrasound instrument and
electrotherapeutics instrument, etc. around the ECG instrument.
2) Do not use or reserve the instrument in the place where the air pressure is too high,
temperature and humidity are over the common standard, the ventilation is not good, dust
is too much, there is gas containing salt and alkali and chemical medicine.
6.3 The instrument should be put on flat place. Take and put it lightly when move it. Avoid too
strong vibration and shock.
6.4 AC frequency and voltage value should accord with requirement ,and has enough current
capacity.
6.5 Please put the device at the place where is easy to be grounded. Do not connect the
patients and the
patients connecting cables with other conductors including ground or beds which can be
conducted well
with ground.
6.6 Please ensure the device operated in the range of environment temperature: 5℃~35℃. If
the device is reserved in higher temperature or lower temperature environments, please wait for
about 10 minutes before using it, to ensure normal operation of the device.

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Chapter 7 Preparation Work before Instrumentation
7.1 Check that the instrument properly grounded and that cable connections safe or not.
7.2 Make sure all electrodes directly connected with patient are properly and firm.
7.3 Check the output voltage when choose the DC UPS.
7.4 Smear the gel separately, avoiding the short circuit caused by the chest electrode touch one
another.
7.5 AC power cable can not be enlaced with ECG cable.

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Chapter 8 Precaution during Operation
8.1 Pay attention to the patient and instrument condition constantly.
8.2 Patient and instrument can only be connected ECG cables.
8.3 Keep close observation of the patient and instrument, to make sure they are not moved
during operation.
8.4 Turn off the instrument after using.
8.5 Turn off the power, and remove the ECG cables slightly without force.
8.6 Properly keep the instrument and spare parts for operation next time.
8.7 Paper Loading
1) Dimension of the high-speed thermal Recording paper used in this instrument is:
80mm(W)*20m(L)
2) Open the cover of paper cabinet, take out the paper axis and install recording paper
according to the figure into the proper position inside.
3) Close the cover of paper cabinet. It's recommended to leave 2 cm of recording paper
outside.

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Chapter 9 Instruction of Recording Paper
9.1 Message "No Paper." will be displayed on the LCD whenever recording paper is run out.
9.2 Specified paper of high sensitivity is recommended for high-quality prints. Other kind of
paper may not render a clear permanent trace and may damage the printing mechanism.
Please consult distributor or manufacture for detail of how to purchase the paper.
9.3 Failure of the recording paper might be affected by high temperature, bad humidity or direct
sunlight. For long storage, the recording paper should be placed in dry, dark and cool area.
9.4 Substance may caused stain of the recording paper:
Gel, glue, and wet diazo compound paper including their organic solvent.
9.5 Substance may caused the waves fade away:
File folders made of soft PVC material, plastic etc.; eraser and magnetic tape contains
plasticizer; fluorescence, and stamp-pad ink.

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Chapter 10 Electrode Placement
Advice: Set the chest electrode first, then the limb electrode.
10.1 Chest Electrode
Attach the chest electrodes to the locations as following:
V1: Fourth inter-costal space at right border of sternum.
V2: Fourth inter-costal space at left border of sternum.
V3: Midway between V2 and V4.
V4: Fifth inter-costal space at left mid-clavicular line.
V5: Left anterior axillary line at the horizontal lever of V4.
V6: Left mid-axillary line at the horizontal lever of V4.
Clean the skin where chest electrodes are to be attached with alcohol, then apply ECG cream
to here around 25mm in diameter and to the edge of chest electrodes, and press and attach the
electrodes to the positions from V1-V6.
Note:Keep in mind that the electrodes’ coming into contact with each other or cream’s
overlap from one position to another is not allowed.
10.2 Limb Electrode
Electrodes should be placed on the soft skin of hands and feet. Clean all the limb electrodes
and the positions around to which limb electrodes are to be attached with alcohol before
applying ECG cream to them, then firmly attach the electrodes to the positions.
Caution: Screw tightly the knob of ECG cable's plug after it inserted to the instrument.

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10.3 Check-List for Electrode Connection and ECG cable
Electrode Location
Electrode Code
Socket Number
Right Alarm
RA/R
9
LeftAlarm
LA/L
l0
Left Leg
LL/F
11
Right Leg
RL/N
14
Chest 1
Vl/Cl
12
Chest 2
V2/C2
1
Chest 3
V3/C3
2
Chest 4
V4/C4
3
Chest 5
V5/C5
4
Chest 6
V6/C6
5
Note:
1. Please apply leads in the close state.
2. Please check the electrode contact the skin well or not, if the ECG didn't appeare for
a long time, then press the start key which will close in several milliseconds several
times.
3. please apply conductive jelly when place electrode.

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Chapter 11 Grounding and Power Connection of Instrument
Make sure the status of the instrument is power off, and then make the instrument be properly
grounded through a 3-prong outlet. When the outlet, a grounding cable may be utilized to
connect the grounding terminal of the instrument. Do not use other pipeline. Properly grounding
could guarantee the safety and prevent from the interference of AC power and electromagnetic
wave.