AT-102 User Guide Rev I

Sales and Service Information

Sales and Service Information

The SCHILLER sales and service centre network is world-wide. For the address of your local distributor, contact your nearest SCHILLER subsidiary. In case of difficulty a complete list of all distributors and subsidiaries is provided on our internet site:

The SCHILLER sales and service centre network is world-wide. For the address of your local distributor, contact your nearest SCHILLER subsidiary. In case of difficulty a complete list of all distributors and subsidiaries is provided on our internet site:

www.schiller.ch

www.schiller.ch

Sales information can also be obtained from: [email protected]

Sales information can also be obtained from: [email protected]

Address Headquarters

Address Headquarters

SCHILLER AG Altgasse 68 CH-6341 Baar Switzerland

Article No: 2.510432 rev.: l Issue date: 10.11.05

Tel: +41 (0) 41 766 42 42 Fax: +41 (0) 41 761 08 80 [email protected] www.schiller.ch

SCHILLER AG Altgasse 68 CH-6341 Baar Switzerland

Article No: 2.510432 rev.: l Issue date: 10.11.05

Tel: +41 (0) 41 766 42 42 Fax: +41 (0) 41 761 08 80 [email protected] www.schiller.ch

AT-102

User Guide

Contents

Art. no.: 2.510432 rev.: l

1

Safety Notes ... 7

1.1

Responsibility of the User ... 7

1.2

Intended Use ... 7

1.3

Organisational Measures ... 8

1.4

Safety-conscious Operation ... 8

1.5

Safety Facilities ... 8

1.6

Operation with other Devices ... 9

1.7

Maintenance ... 9

1.8

Extra Precautions for Spirometry ... 10

1.9

Safety Symbols and Pictograms ... 11

1.9.1 1.9.2

Used symbols in this document ... 11 Symbols used on the device ... 12

1.10

Terms of Warranty ... 13

2

Introduction ... 14

2.1

Features... 14

2.1.1 2.1.2

Standard... 14 Options... 14

2.2

Main Components of the AT-102... 15

2.2.1 2.2.2 2.2.3

Back Panel ... 16 Keypad ... 16 LCD Screen... 18

3

Operation ... 19

3.1

Start-up and Initial Preparation ... 19

3.1.1 3.1.2 3.1.3 3.1.4 3.1.5 3.1.6 3.1.7 3.1.8 3.1.9

Location... 19 Connection of External Cable Assemblies and Ancillary Equipment 19 Potential Equalisation... 19 Switching ON and OFF ... 20 Power Supply ... 20 Recharging the Battery ... 20 Isolating the Mains Supply ... 20 System and ECG Settings ... 20 LCD Contrast Adjustment ... 20

3.2

Changing the Printing Paper ... 21

3.3

Entering Patient Data ... 22

4

Electrode Placement ... 23

4.1

Electrode Identification and Colour Code ... 23

4.2

Standard 10-lead Resting ECG ... 24

4.2.1 4.2.2

Placing the Electrodes ... 24 Exercise ECG... 25

Page 3

Page 4

4.3

Further Lead Combinations... 26

4.3.1 4.3.2

Nehb Leads... 26 Additional Leads ... 27

4.4

Skin/Electrode Resistance... 28

4.4.1

Electrode and Patient Cable Check (Lead Test)... 28

5

Resting ECG ...29

5.1

Procedural Flow Diagram ... 29

5.2

Automatic Mode Recording ... 30

5.2.1

The Auto Mode Printout ... 30

5.3

Manual Mode (Rhythm Printout) Recording... 31

5.4

Screen (and Manual Printout) Settings... 32

6

Exercise ECG ...33

6.1

Exercise Flow Diagram ... 34

6.1.1 6.1.2 6.1.3 6.1.4

Initial Preparation ... 34 Selecting the Ergo Device and Protocol ... 35 Starting the Test... 36 Ending the Test... 37

6.2

Test Procedure Overview... 38

6.3

During the Test ... 39

6.3.1 6.3.2

Controlling the Ergometer during the Test ... 39 Entry of Blood Pressure Values ... 39

7

Memory ...40

7.1

Using the memory ... 40

7.2

Transmit Options ... 41

8

Unit and ECG Settings ...43

8.1

ECG Settings... 43

8.1.1 8.1.2 8.1.3 8.1.4 8.1.5

Table of ECG Settings and Options - Auto Format 1 and 2... 44 Filter ... 45 Interpretation... 46 Lead ... 47 General, Storage and Print Settings ... 48

8.2

Exercise Settings... 49

8.2.1 8.2.2 8.2.3

General Settings ... 49 Defining / Editing a Protocol... 50 Factory Preset Protocols... 50

8.3

System Settings... 51

8.3.1 8.3.2 8.3.3 8.3.4 8.3.5 8.3.6 8.3.7 8.3.8

Unit... 51 Communication (RS232)... 52 Communication (with SCM Option)... 53 Test and Info ... 54 Print Setup ... 55 Communications Test ... 56 Installing New Software Options (Upgrade)... 56 Default Settings... 57

Art. no.: 2.510432 rev.: l

AT-102

9

Unit Maintenance ...58

9.1

Visual Inspection ... 58

9.2

Cleaning the Casing and Cable Assemblies ... 59

9.3

Cleaning the Thermal Print Head ... 59

9.4

Battery Maintenance... 60

9.4.1 9.4.2

Charging the battery ... 60 Battery disposal ... 60

9.5

Changing the fuse and mains voltage ... 61

9.5.1 9.5.2 9.5.3

Fuse types ... 61 Changing a fuse... 61 Changing the mains voltage ... 61

10

Trouble Shooting ...62

10.1

Trouble Shooting Table... 62

10.2

Accessories and Disposables ... 63

11

Technical Data ...64

11.1

System ... 64

11.2

ECG ... 65

11.3

Safety Standards ... 66

11.4

Options ... 66

11.5

Configurations ... 66

12

Spirometry ...67

12.1

Intended use... 67

12.2

Introduction... 67

12.3

Changing the Mouthpiece... 68

12.3.1 12.3.2

SP-250 Sensor... 68 SP-260 Sensor... 69

12.4

Preparation... 70

12.5

Unit Calibration ... 71

12.5.1

Calibration Information... 72

12.6

Taking a Spiro Measurement... 73

12.7

Displaying the Results ... 74

12.7.1

Screen Information... 74

12.8

Pulmonary Test Overview... 75

12.8.1 Forced Vital Capacity (FVC) ... 75 12.8.2 Slow Vital Capacity (SVC) ... 75 12.8.3 Maximum Voluntary Ventilation (MVV) ... 76 12.8.4 Post-Medication Tests ... 76

12.9

Best and Predicted Values and Ethnic Influences ... 77

12.9.1 12.9.2 12.9.3

Definition of Best... 77 Predicted Values... 77 Ethnic Influences on Predicted Values ... 77

12.10 Spiro Settings ... 78 12.10.1 Printout... 78 12.10.2 Device ... 79

Page 5

Art. no.: 2.510432 rev.: l

AT-102

AT-102

13

Spiro References ...80

13.1

Diagnosis... 80

13.1.1 International ... 80 13.1.2 American... 81 13.1.3 Air Obstruction Categories... 81 13.1.4 Chest Restriction Categories ... 82 13.1.5 Ratio of Post (Pre/Post) ... 82

Measured Values ... 83

13.3

Norm Values... 84

13.3.1 13.3.2 13.3.3

Ethnic Influences on Norm Value... 84 International Norm Standards ... 85 Norm Values for the USA and Canada ... 88

14

Index ...93

Art. no.: 2.510432 rev.: l

13.2

Page 6

AT-102

User Guide

Safety Notes Responsibility of the User

1 1.1

1 Safety Notes 1.1

Responsibility of the User V V

V V V V V

1.2

Intended Use V

V

V V

V V V V Art. no.: 2.510432 rev.: l

This device must only be used by qualified doctors or trained medical personnel. The numerical and graphical results and any interpretation given must be examined with respect to the overall clinical condition of the patient and the general recorded data quality. The indications given by this equipment are not a substitute for regular checking of vital functions. Specify the competencies of the personnel for operation and repair. Ensure that personnel have read and understood these operating instructions. In particular this section “safety ‘notes‘ must be read and understood. Damaged or missing components must be replaced immediately. The operator is responsible for compliance with all applicable accident prevention regulations and safety regulations.

V

V

The AT-102 is a 12-channel, ECG device used for the recording, analysis and evaluation of ECG Recordings. Recordings made with the AT-102 can be used as a diagnostic aid for heart function and heart conditions. It is designed for indoor use and can be used for all patients of both sexes, all races, and all ages. The diagnostic applications for which the AT-102 is intended is in the diagnosis of cardiac abnormalities in the general population, detecting acute miocardial ischemia, and infarction in chest pain patients, etc. The AT-102 is intended for use in hospitals, cardiological units, out-patient clinical units, and general physicians offices. The AT-102 includes a low sensitivity setting. Low sensitivity will suppress certain non-specific ECG diagnoses; this can be used for screening high-specificity program intended for low-risk patients. The high sensitivity setting is used for detecting cardiac abnormalities in all and high risk patients including those taking thrombosis medication. There is no danger for patients with pacemaker. Only operate the device in accordance with the specified technical data. The device is not designed for sterile use nor is it designed for outdoor use. Do not use this unit in areas where there is any danger of explosion or in the presence of flammable gases such as anaesthetic agents.

© This unit is CF classified and defibrillation protected only when the original patient cable is used. However, as a safety precaution when possible, remove electrodes before defibrillation. This product is not designed for internal use. This product is not designed for direct cardiac application.

Page 7

1 1.3

Safety Notes Organisational Measures

1.3

AT-102

Organisational Measures V Before using the unit, ensure that an introduction regarding the unit functions and the safety precautions has been provided by a medical product representative. V Keep these operating instructions in an accessible place for reference when required. Make sure that they are always complete and legible. V Observe the operating instructions and maintenance instructions. V These operating instructions do not override any statutory or local regulations, or procedures for the prevention of accidents and environmental protection.

1.4

Safety-conscious Operation V Make sure that the staff have read and understood the operating instructions particularly this “Safety Notes” section. V Do not touch the unit casing during defibrillation. V To ensure patient safety, none of the electrodes including the neutral electrode, nor the patient or any person with simultaneous patient contact, must come in contact with conductive parts, even when these are earthed. V Immediately report any changes that impair safety (including operating behaviour) to the person responsible. V Do not place any liquids on the unit. If liquid should be spilled over the device, immediately disconnect the device from the mains and wipe it. The device must be serviced before reusing. V Only connect the original SCHILLER patient cable to the patient socket.

1.5

Safety Facilities

Art. no.: 2.510432 rev.: l

V Operating the device without the correctly rated fuse, or with defective cables, constitutes a danger to life. Therefore: – Do not operate the unit if the earth connection is suspect or if the mains lead is damaged or suspected of being damaged. – Damaged cable connections and connectors must be replaced immediately. – The electrical safety devices, such as fuses, must not be altered. – Ruptured fuses must only be replaced with the same type and rating as the original.

Page 8

AT-102

User Guide

1.6

1 1.6

Operation with other Devices V

V

V V

V

V

V

1.7

Safety Notes Operation with other Devices

Only use accessories and other parts recommended or supplied by SCHILLER AG. Use of other than recommended or supplied parts may result in injury, inaccurate information and/or damage to the unit. Ancillary equipment connected to any analogue and/or digital interface of the unit must be certified according to the respective IEC standards (e.g. IEC/EN 60950 for data processing equipment and IEC/EN 60601-1 for medical equipment). Furthermore all configurations shall comply with the valid version of the system standard IEC/EN 60601-1-1. Everybody who connects additional equipment to the signal input part or signal output part configures a medical system, and is therefore responsible that the system complies with the requirements of the valid version of the system standard IEC/EN 60601-1-1. If in doubt, consult the technical service department or your local representative. Any other equipment used with the patient must use the same common earth as the AT-102. Precautions must be observed when using high frequency devices. Use the special high frequency SCHILLER patient cable to avoid possible signal interference during ECG acquisition. There is no danger when using the ECG unit simultaneously with electrical stimulation equipment. However, the stimulation units should only be used at a sufficient distance from the electrodes. If in doubt, the patient should be disconnected from the device. If the patient cable should become defective after defibrillation, an electrode becomes displaced, or an electrode resistance is too high, a lead-off indication is displayed in the upper right part of the screen and an acoustic alarm given. If the device is a part of a medical system, the original SCHILLER patient cable must only be used with, and connected to, the patient connector on the AT-102.

Maintenance V V V

Art. no.: 2.510432 rev.: l

V V

Danger of electric shock! Do not open the device. No serviceable parts inside. Refer servicing to qualified technician authorised by SCHILLER only. Before cleaning and to isolate the mains power supply, switch the unit off and disconnect it from the mains by removing the plug. Do not use high temperature sterilisation processes (such as autoclaving). Do not use E-beam or gamma radiation sterilisation. Do not use solvent or abrasive cleaners on either the unit or cable assemblies. Do not, under any circumstances, immerse the unit or cable assemblies in liquid.

Page 9

1 1.8

Safety Notes Extra Precautions for Spirometry

1.8

AT-102

Extra Precautions for Spirometry

Art. no.: 2.510432 rev.: l

V For correct predicted values and diagnosis, it is important that all patient data is entered correctly. In particular gender, date of birth, ethnic, height and weight must be entered. V The unit must be calibrated at the beginning of every day, or after a significant change in temperature. V False measurements can result when the sensor is not held vertically - always ensure that the sensor is held upright at all times. V If using the SP-250 sensor - The disposable mouthpiece of the SP-250 spiro sensor is designed for one-time use to eliminate the danger of cross contamination - do not use the mouthpiece for more than one patient. Do not attempt to clean the mouthpiece. V If using the SP-260 sensor - The mouthpiece of the SP-260 spiro sensor is reusable. Thoroughly disinfect the mouthpiece assembly before using for another patient. Replace the filter after every patient - do not use the filter for more than one patient.

Page 10

AT-102

User Guide

Safety Notes Safety Symbols and Pictograms

1.9

Safety Symbols and Pictograms

1.9.1

Used symbols in this document

1 1.9

The safety level is classified according ANSI Z535.4. The following overview shows the used safety symbols and pictograms used in this manual.

For a direct danger which could lead to severe personal injury or to death.

For a possibly dangerous situation, which could lead to heavy bodily injury or to death.

For a possibly dangerous situation which could lead to personal injury. This symbol is also used to indicate possible damage to property.

For general safety notes as listed in this chapter.

Used for electrical dangers, warnings and other notes in regarding operation with electricity. Note For possibly dangerous situations, which could lead to damages to property or system failure. Important or helpful user information.

Art. no.: 2.510432 rev.: l

Reference to other guidelines.

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1 1.9

Safety Notes Safety Symbols and Pictograms

1.9.2

AT-102

Symbols used on the device Potential equalization.

CF symbol. This unit is classified safe for internal and external use. However, It is only defibrillation protected when used with the original SCHILLER patient cable.

Symbol for the recognition of electrical and electronic equipment. Equipment/components and accessories no longer required must be disposed of in a municipally approved collection point or recycling centre. Alternatively, you can return the equipment to your supplier or SCHILLER AG for disposal. Improper disposal can harm the environment and human health.

The unit/component can be recycled.

Notified body of the CE certification (TÜV P.S.).

Art. no.: 2.510432 rev.: l

Attention: Consult accompanying documents.

Page 12

AT-102

User Guide

1.10

Safety Notes Terms of Warranty

1 1.10

Terms of Warranty The SCHILLER AT-102 is warranted against defects in material and manufacture for the duration of one year (as from date of purchase). Excluded from this guarantee is damage caused by an accident or as a result of improper handling. The warranty entitles free replacement of the defective part. Any liability for subsequent damage is excluded. The warranty is void if unauthorised or unqualified persons attempt to make repairs. In case of a defect, send the apparatus to your dealer or directly to the manufacturer. The manufacturer can only be held responsible for the safety, reliability, and performance of the apparatus if: • assembly operations, extensions, readjustments, modifications, or repairs are carried out by persons authorized by him, and • the SCHILLER AT-102 and approved attached equipment is used in accordance with the manufacturers instructions.

Art. no.: 2.510432 rev.: l

There are no express or implied warranties which extend beyond the warranties hereinabove set forth. SCHILLER makes no warranty of merchantability or fitness for a particular purpose with respect to the product or parts thereof.

Page 13

2 2.1

Introduction Features

AT-102

2 Introduction 2.1

Features The SCHILLER AT-102 is a 12-channel ECG unit designed to record, display, and measure resting ECGs. The AT-102 has the following features:

2.1.1

Standard • Alphanumeric keypad and dedicated soft key interface for easy, user friendly operation. • Memory for up to 40 recordings. • Integral full size thermal quality printer with various user defined print format options.

2.1.2

Options • Exercise ECG with interface for control of digital ergometers and treadmills. • External diskette printer. • ECG Interpretation including measurements and average cycles with automatic and manual printout of the recording. • VGA socket for connection of an external monitor (ECG traces only). • Sensor for spirometry recording (software is standard and pre installed on the AT102). Two sensors are available for use with the spiro software: – SP-260 sensor. This sensor has a disposable filter in the mouthpiece. After every patient the filter must be changed and the mouthpiece sterilised. – SP-250 sensor. This sensor has a disposable mouthpiece assembly. For every new patient the mouthpiece assembly is replaced complete removing the need to sterilise after every patient.

Schiller Communication Module (SCM)

Art. no.: 2.510432 rev.: l

• Analogue Modem connecter (with optional internal modem) • RJ-45 ethernet connector (network)

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AT-102

User Guide

2.2

Introduction Main Components of the AT-102

2 2.2

Main Components of the AT-102

5

1

4

3 2

V

All externally connected hardware must be approved by SCHILLER. Connection of any hardware not approved by SCHILLER is at the owner‘s risk. The unit guarantee may also be invalid.

Keypad and dedicated function keys. Patient cable connector. RS-232 for any of the following: – connection of an ergo device – connection of a spiro sensor – connection of a modem or a PC for export of stored recordings. 4. Softkey control. 5. LCD Display.

Art. no.: 2.510432 rev.: l

1. 2. 3.

Page 15

2 2.2

Introduction Main Components of the AT-102

2.2.1

AT-102

Back Panel

1

1. 2. 3. 4. 5. 6.

2

3

4

5

6

7

RJ-45 Ethernet LAN connector (Local Area Network). RJ-11 telephone connector (with optional internal modem). VGA connector for an external monitor (option). LPT connector for an external printer. Master Reset. Potential equalisation stud. The potential equalisation stud is used to equalise the ground potential of the unit to that of any nearby mains powered equipment. Use the hospital or building common ground for all mains powered units.

V If an external printer, monitor or ergo device is connected to the AT-102, the potential equalisation stud must be connected to common ground when the AT-102 is working on battery power i.e. when the mains lead (with grounding lead) is not connected to the unit (see page 19). 7.

2.2.2

Mains connector and fuse box (fuses: 2 x T 160 mA / 250 V)

Keypad

1

6 3

7

4 8

5

1.

Page 16

Softkeys - the function of these keys changes depending on the screen displayed. The function of these keys is shown on the screen above the keys. If nothing is written above a softkey, it has no function for the current screen.

Art. no.: 2.510432 rev.: l

2

AT-102

User Guide

Introduction Main Components of the AT-102

2 2.2

2.

Recording keys – Auto Key - Auto Mode recording (in Auto mode 1). Press the Shift followed by the Auto key for auto mode 2. – Stop key - stop printout or confirm (new) setting ( in a settings screen). 3. The top figures on the number keys and the top line keys form left to right are as follows: – `1` and `2 ` (designated < and >), change the lead group displayed on the screen, forward and backward resp. – Auto sensitivity key - automatically sets the ECG printout sensitivity (in auto mode only) to the best setting for the signal strength (5mm/mV or 10mm/mV) – ‘4‘, ‘5‘ and ‘6‘ sets the sensitivity of the ECG both on the screen and on the (manual) printout to 5, 10 or 20 mm / mV, resp. – ‘7‘, ‘8‘ and ‘9‘ sets speed of the ECG both on the screen and on the (manual) printout to 25 or 50 mm/s. The speed of the manual printout can be 5, 10, 25 or 50 mm/s. The 5 and 10 mm/s settings are both on the same key which toggles the two speeds. – ‘0‘- inserts a 1mV reference marker on the screen and printout. Recentres the trace. – QRS beep - toggles the QRS beeper On/Off – Myogram filter On/Off. The cutoff frequency can be user defined in Setup see page 43). – Delete last typed character. 4. Open / Close paper tray (to replace thermal printing paper) 5. Function Key. When pressed before another key, initiates the second function of that key – For example, second letters on the keypad - è, é, ç, ø @ etc., are entered by holding the function key before pressing the letter key. 6. Patient data key. Press this key to enter a new patient or modify the data for the current one. The first screen displayed on initial switch on can be set to the patient data screen, or the ECG screen This is set for user preference in the system settings (see page 51). On / Off Keys and mains Indicator - lit when mains connected. Cursor and general arrow keys - press the function key (5) and the Up/Down arrows to adjust screen contrast. When entering patient data use the Left/Right arrow keys to move the cursor in the data field. Use the Up/Down arrow keys to go up/down to the next data entry.

Art. no.: 2.510432 rev.: l

7. 8.

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2 2.2

Introduction Main Components of the AT-102

2.2.3

AT-102

LCD Screen The display will vary according to the current task being carried out. In all screens however, the top and bottom lines always display the same information: the top line displays system information, and the bottom line displays the softkey options. The following is an example of a typical resting ECG screen. 1

2

4

3

Items 1, 2 and 3 are in the same position for all screens. Top line - time, date, patient name, and current power source - mains (~), or battery ( ). When battery capacity is limited the battery symbol flashes. 2. Data acquisition area or data entry area. 3. Softkey designation. Pressing the key below the text carries out the function indicated. The options available will change according to the screen displayed. 4. The following is specific for ECG acquisition only: – Current Heart Rate (averaged over 4 beats and refreshed every 2 seconds). The HR is also given on a manual printout. Note that with an auto mode printout the HR is averaged over the full 10 seconds of the recording. – Electrode connections - when an electrode indication flashes (an audible alarm is also given), it indicates that the electrode resistance is too high. The electrode(s) must be re-applied. – Sensitivity - 5, 10 or 20 mm/mV. Change the sensitivity with the keys 3 (auto), 4, 5 and 6. An `A` in this box indicates that automatic sensitivity is selected (auto mode printout only). – Speed - 25 or 50 mm/s. Change the speed with the keys 8 and 9. – Lead indication (leads currently displayed on the screen). Change the lead group with the < and > keys on the keypad. – Myogram Filter indication - 'Filter ON' or 'Filter OFF'. The filter is applied with the filter key. – Note: the frequency of the filter cutoff is defined in Setup (). – Area for system messages or instructions.

Page 18

Art. no.: 2.510432 rev.: l

1.

AT-102

User Guide

Operation Start-up and Initial Preparation

3 3.1

3 Operation 3.1

Start-up and Initial Preparation V

3.1.1

Danger of electrical shock. Do not operate the unit if the earth connection is suspect or if the mains lead is damaged or suspected of being damaged.

Location • Do not keep or operate the unit in a wet, moist, or dusty environment. Avoid exposure to direct sunlight or heat from other sources. • Do not allow the unit to come into contact with acidic vapours or liquids. • The AT-102 should not be placed in the vicinity of X-ray or diathermy units, large transformers or electric motors. It must also be positioned at least one meter from the mains supply.

3.1.2

Connection of External Cable Assemblies and Ancillary Equipment 1. 2.

Check the voltage setting (115V or 230V) (see page 61). Connect the power cable at the rear of the unit. The Mains indicator lamp is lit. Leave the AT-102 connected to the mains for 7 hours to fully charge the battery. 3. Connect the patient cable (side panel). 4. Connect any ancillary and optional equipment. These may include the following: – Ergometer (analogue or digital) for exercise testing – Spiro sensor (for spirometry) – External monitor – Network cable – External printer

3.1.3

Potential Equalisation

Art. no.: 2.510432 rev.: l

The potential equalisation stud at the rear of the unit is used to equalise the ground potential of the AT-102 to that of all mains powered equipment in the vicinity. Use the hospital or building common ground. A yellow/green ground cable is supplied as an option (Article number 2. 310 005). To avoid possible interference from the ergometer when carrying out an exercise test, it is recommended that both the AT-102 and the ergometer are connected to the same common ground.

V

To prevent the possibility of leakage current when an external printer, external monitor, or ergo device is connected, always ensure that the mains lead (with earth grounding connection), and / or the potential equalisation, is attached to the AT-102.

Page 19

3 3.1

Operation Start-up and Initial Preparation

3.1.4

AT-102

Switching ON and OFF The AT-102 is switched on with the green On key and off with the red Off key. These keys are situated on the top right of the keypad.

3.1.5

Power Supply The unit can either be operated from the mains supply or from the built-in rechargeable battery. The power source is indicated on the top line of the LCD - mains (~), or battery ( ). The internal battery provides power for approximately 3 hours. When battery capacity is limited the battery symbol flashes.

3.1.6

Recharging the Battery To recharge the battery, connect the apparatus to the mains supply by means of the supplied power cable. A totally discharged battery requires approximately: • 15 hours to be fully recharged • 7 hours to be 90% recharged • 3 hours to be 60% charged The unit can remain connected to the mains supply without damage to either the battery or the unit. When working from battery power, the unit is automatically switched off after 5 minutes (30 seconds if battery capacity is limited) if no key is pressed.

3.1.7

Isolating the Mains Supply To isolate the power supply, remove the mains plug from the wall socket.

3.1.8

System and ECG Settings The System Settings (time, date, user ID, etc.) and resting and exercise ECG settings and other general settings (macros, ergometer, etc.), are found in the System Settings section (see page 51).

3.1.9

LCD Contrast Adjustment

Art. no.: 2.510432 rev.: l

Press the function key Fn and the Up / Down arrows to adjust screen contrast.

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