Welch Allyn Schiller AT-2plus Manual
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Welch Allyn Schiller AT-2plus Manual

6-channel electrocardiograph
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AT-2plus
6-Channel Electrocardiograph
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March 3, 2025

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Summary of Contents for Welch Allyn Schiller AT-2plus

  • Page 1 Cardio Menu Service Manual AT-2plus 6-Channel Electrocardiograph...
  • Page 2 Welch Allyn Canada Ltd Cubblington Road 160 Matheson Blvd. East, Unit #2 Aston Abbotts HP22 4ND Mississauga, Ontario L4Z 1V4 United Kingdom Canada Tel: 01296-682-140 Tel: (800) 561-8797 Fax: 01296-682-104 Fax: (905) 890-0008 Copyright © `97 & `98 by Welch Allyn Schiller...
  • Page 3 DECLARATION OF CONFORMITY Electrocardiograph: Cardiovit AT - 2 Plus Serial numbers starting with: 025. Years of manufacturing: 1996 onwards We, the undersigned,hereby declare that the medical device (classe II a) specified above conforms with the Essential Require- ments listed in Annex I, of EC Directive 93/42/EEC This declaration is supported by: Certificate of approval No: 11425-02...
  • Page 4 Allyn or it`s authorized distributors or agents. Accessory items such as electrodes, batteries and cables are limited to a warranty of 90 days from the date of purchase from Welch Allyn or its authorized distributors or agents. Welch Allyn will repair or replace any components found to be defective or at variance from manufacturer`s specifications within this time at no cost to the customer.
  • Page 5 PHYSICIAN‘S RESPONSIBILITY THE AT-2PLUS ELECTROCARDIOGRAPH IS PROVIDED FOR THE EXCLUSIVE USE OF QUALIFIED PHYSICIANS OR PERSONNEL UNDER THEIR DIRECT SUPERVISION. THE NUMERICAL AND GRAPHICAL RESULTS FROM A RECORDING MUST BE EXAMINED WITH RESPECT TO THE PATIENTS OVERALL CLINICAL CONDITION. THE RECORDING PREPARATION QUALITY AND THE GENERAL RECORDED DATA QUALITY, WHICH COULD EFFECT THE REPORT DATA ACCURACY, MUST ALSO BE TAKEN INTO ACCOUNT.
  • Page 6 RADIATION STERILISATION. DO NOT USE SOLVENT CLEANERS USE ONLY ACCESSORIES AND OTHER PARTS RECOMMENDED OR SUPPLIED BY WELCH ALLYN SCHILLER. USE OF OTHER THAN RECOMMENDED OR SUPPLIED PARTS MAY RESULT IN INJURY INACCURATE INFORMATION AND/ OR DAMAGE TO THE UNIT.
  • Page 7 THIS UNIT IS CF CLASSIFIED ACCORDING TO IEC 601-1. THIS MEANS THAT THE PATIENT CONNECTION IS FULLY ISOLATED AND DEFIBRILLATION PROTECTED. WELCH ALLYN SCHILLER CAN ONLY GUARANTEE PROTECTION AGAINST DEFIBRILLATION VOLTAGE HOWEVER, WHEN THE ORIGINAL WELCH ALLYN SCHILLER PATIENT CABLE IS USED.
  • Page 8 Alternatively, used batteries can be returned to Welch Allyn Schiller for ÇÃ disposal. Unit Disposal Instructions Units no longer required can be returned to Welch Allyn Schiller for disposal. Alternatively, dispose of the unit in municipally approved recycling centres. viii...
  • Page 9 Power Supply The mains connection is on the rear of the unit. The power supply voltage is set by the factory for100-115V(nom. 110V) or 220-240V (nom. 230V) working. The setting is indicated by the indented metal strip on the fuse panel.
  • Page 10 AT-2plus User`s Guide This User`s Guide gives instructions on how to operate the unit and provides an overview of all the basic functions in an easy and simple to use format. The procedures are presented in a logical, step-by step way to enable the user to quickly and easily familiarise themselves with unit operation.
  • Page 11 AT-2plus 6-Channel ECG Unit - USER GUIDE AT-2plus - Manual ECG Recording (Rhythm Strip) User Guide • Prepare skin, hook up patient. Short Form Instructions • Switch unit on, press ON • Press MAN START PRINT Automatic ECG Recording • Prepare skin, hook up patient.
  • Page 12 List of Symbols Mains connected Potential Equalisation Battery operation (common ground) (Flashes when battery capacity limited. Attention - General warning sign - see accompanying documentation 93/42/EEC Medical Devices: 0124 `Notified Body` DEKRA AG Type CF equipment - safe for internal ♥...

  • Page 13: Table Of Contents

    AT-2plus 6-Channel ECG Unit - USER GUIDE Modes of Operation ..........4 Automatic Mode (ECG) Settings ......23 Automatic Mode ..............4 Average Cycles ..............24 Manual Mode ..............4 Measurements and Markings (i version only) ....25 Interpretation (i version only) ..........26 Automatic Mode ............

  • Page 14: Modes Of Operation

    Modes of Operation Automatic Mode Manual Mode Automatic Mode provides a printout giving 10 seconds of ECG Manual Mode provides a real time printout of 6 leads that are recording of all 12 leads with a choice of 2 different formats. selected and indicated on the screen.

  • Page 15: Automatic Mode

    AT-2plus 6-Channel ECG Unit - USER GUIDE Automatic Mode The printout gives the following: In automatic mode, a full 12-lead ECG is printed in one of two • ECG recording of all leads in either Standard or Cabrera predefined formats with a sensitivity of 10 mm/mV. These two format according to selection formats are selected by the user to suit his specific needs and •...

  • Page 16: Manual Mode

    Manual Mode Manual mode provides a direct printout of the real-time ECG with The printout provides you with the following: full control of parameter selection. • Six (selected) leads with lead identification. • On the lower edge, the chart speed, user identification and filter settings (if on).
  • Page 17 AT-2plus 6-Channel ECG Unit - USER GUIDE Manual Mode Chart Speed Select speed 5, 10, 25 or 50mm/s by means of Myogram Filter Switch the filter ON or OFF with the FILTER the SPEED keys: key: 5/10 FILTER Notes: Key 7 is a toggle key -press once and 5 is selected, `FILTER` is displayed on the bottom line of the press a second time and 10mm/s is selected.

  • Page 18: Patient Cable Connections

    Thoroughly clean the area with alcohol. and defibrillation protected. Protection against defibrillation voltage is however only ensured, if the original WELCH ALLYN SCHILLER Place the C4 electrode first - in the fifth patient cable (Part-no. 80130-0000) is used. Make sure that during intercostal space on midclavicular line.

  • Page 19: Standard Leads

    AT-2plus 6-Channel ECG Unit - USER GUIDE Standard Leads Patient Cable Connections Black Green White White/Red Brown/Red White/Yellow Brown/Yellow White/Green Brown/Green White/Brown Brown/Blue White/Black Brown/Orange White/Violet Brown/Violet Yellow Black Green...

  • Page 20: Location & Power

    Location & Power Power Indication Location Do not keep or operate the apparatus in a wet, moist, or dusty environment. Also, avoid exposure to direct sunlight or heat from other sources. Do not allow the unit to come into contact with acidic Wed 20-AUG-96 18:20:21 R L F C1 C2 HR: 76/min...

  • Page 21: Switching On And Off

    AT-2plus 6-Channel ECG Unit - USER GUIDE Switching On and Off The SCHILLER AT-2plus is switched on with the green ON key Potential Equalisation If the AT-2plus is used in conjunction with other patient connected equipment, we recommend that the potential equalisation stud (on the rear of the unit) is connected to the hospital/ building common ground using the yellow/green earth cable.

  • Page 22: Keyboard

    Keyboard AUTO 5/10 PATIENT DATA DELETE COPY FILTER ü é è å STOP ö ç ä ø ENTER PRINT AUTO PRINT SPACE...
  • Page 23 AT-2plus 6-Channel ECG Unit - USER GUIDE Keyboard 8. The top character `QRS` toggles the QRS beeper ON/ OFF Print extra copy - of Auto mode recording currently in memory. Press 9. Delete last typed character. the ALT key first followed by this key to obtain a copy in Auto format 10.

  • Page 24: Lcd Screen

    LCD Screen 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. Top line - Current Day, Date and Time Bottom Line - System messages Top Line - Current power source - mains or battery.

  • Page 25: Settings

    AT-2plus 6-Channel ECG Unit - USER GUIDE Settings The setting is remembered and the keyboard released for other Each parameter is set by means of a code. This code comprises a functions when the STOP key is pressed. Once a setting has been combination of keys starting with the ALT key followed by two or confirmed, it is stored in the memory even when the unit is switched three numbers.
  • Page 26 Settings The defined formats and settings that are set for your unit can be Marks Enabled (+) or Suppressed (-) checked as follows: Interpretation Enabled (+) or Suppressed (-) Setup Printout Selected Rhythm leads Leads selected for R1, R2 resp. Entry Key Sequence Result Automatic Centering...

  • Page 27: Default Settings

    AT-2plus 6-Channel ECG Unit - USER GUIDE W I T H S E T T I N G S S T A N D A R D I N T E R P R E T A T I O N Settings L A N G U A G E A S S E T...

  • Page 28: Language - American And Standard English

    Settings Language - American and Standard English User Identification The unit language is set by the software and cannot be changed. The user identification is printed on all recordings. The user ID can However, when English is installed it is possible to select American be the department, doctor or hospital etc.

  • Page 29: Filters

    AT-2plus 6-Channel ECG Unit - USER GUIDE Settings Filters Note: The set value is the lower limit of the frequency range and is There are three different filters which can be set individually as normally set to 0.05 Hz. The settings 0.15 and 0.30 Hz follows: should only be used when absolutely necessary, as the •...

  • Page 30: Myogram Filter

    Settings Myogram Filter The myogram filter is switched on and off manually with the FILTER The Myogram filter suppresses disturbances caused by strong FILTER muscle tremor. The set value will be the new upper limit of the frequency range as soon as the FILTER key is pressed on or programmed as default when the unit is switched on.

  • Page 31: Defining Lead Sequence & Printout

    AT-2plus 6-Channel ECG Unit - USER GUIDE Settings Defining Lead Sequence & Printout The selectable printout forms are: Simultaneous All ECG leads are printed in the same time The required settings can be selected as follows: segment (in automatic mode only). Sequences, Print &...

  • Page 32: Acoustic Qrs Indication

    Settings Acoustic QRS Indication The acoustic QRS beep can be switched on or off at any time by pressing the QRS key Time / Date The required settings can be selected as follows: Setting the Time and Date Key Sequence Enter Data Confirmation HHMMSS...

  • Page 33: Automatic Mode (Ecg) Settings

    AT-2plus 6-Channel ECG Unit - USER GUIDE Automatic Mode (ECG) Settings Two separate Auto formats can be defined for the AT-2plus. When ECG Format defining auto format 1 the key sequence ALT `1` precedes the setting. Entry Key Sequence Printout Confirm When defining auto format 2 the key sequence ALT `2` precedes the setting.

  • Page 34: Average Cycles

    Automatic Mode (ECG) Settings Average Cycles (interpretation option only) Average Cycles Entry Key Sequence Printout Confirm The Average cycles are defined as follows: No average lead cycles are printed Note: Lead selection for the rhythm lead(s) are defined on page 27 4 x 3 (25 mm/s) + 2 rhythm leads (25mm/s).

  • Page 35: Measurements And Markings (I Version Only)

    AT-2plus 6-Channel ECG Unit - USER GUIDE Automatic Mode (ECG) Settings Measurements (Interpretation Option Only) Measurements and Markings (i version only) Entry Key Sequence Printout Confirm Detailed table of To define the measurements and markings proceed as follows: measurement results omitted - however, the values of electrical axes, intervals, and...

  • Page 36: Interpretation (I Version Only)

    Automatic Mode (ECG) Settings Interpretation Settings (i version only) Interpretation (i version only) The interpretation settings enable the user to determine whether or To print or suppress interpretation statements on the printout not certain comments will be added to the interpretation statements proceed as follows: on the ECG printout.

  • Page 37: Selecting Rhythm Leads

    AT-2plus 6-Channel ECG Unit - USER GUIDE Automatic Mode Settings Extremity Leads Entry Key Sequence Lead Confirm Selecting Rhythm Leads The rhythm leads are printed out as defined. Two separate rhythm leads can be selected. The following formats can be set: Press ALT 3 or 4 STOP key...

  • Page 38: Memory And Data Transmission Option

    Memory and Data Transmission Option Auto Storage and Auto Erase Safety Notices Memory Setup WHEN NON-MEDICAL DEVICES ARE CONNECTED TO THE RS-232 INTERFACE ENSURE THAT BOTH UNITS ARE Entry Key Sequence Save Mode SECURELY CONNECTED TO THE SAME EARTH POTENTIAL. Auto save off Auto save on WHEN OPERATING THE UNIT ON BATTERY AND...

  • Page 39: Manual Storage

    AT-2plus 6-Channel ECG Unit - USER GUIDE Reading and Printing a Stored File Memory and Data Transmission Option ° Enter the memory mode - press the ALT key followed by the key 'M'. Manual Storage When auto save is set to off, the following message is displayed ALT + `M` after an auto mode ECG.

  • Page 40: Memory And Data Transmission Option

    Memory and Data Transmission Option Transmitting Stored Files The mode of transmission is as follows: The contents of the memory can be transmitted to the SEMA-200 Communication Mode data management program, either directly using the RS-232 connector Entry Key Sequence Mode of the computer, or over the telephone system.

  • Page 41: Line Transmission

    AT-2plus 6-Channel ECG Unit - USER GUIDE Memory and Data Transmission Option The transmit function (over line or modem), transmits all recordings currently in memory, to the selected destination. Modem Transmission Line Transmission To transmit recordings over the telephone network, proceed as fol- To transmit recordings over line, proceed as follows: lows °...
  • Page 42 Memory and Data Transmission Option ° Enter the memory mode - press the ALT key followed Enter the telephone number preceded by `P` or `T` (tone or by the key 'M'. pulse). A comma `,` gives a one second pause in dialing - this may ALT + `M` be necessary if for example, an outside line is required.

  • Page 43: Care & Maintenance

    AT-2plus 6-Channel ECG Unit - USER GUIDE Care & Maintenance Self-test Initiate a self-test of the AT-2plus as follows: Cleaning the Casing Self Test Entry Key Sequence Action CAUTION: SWITCH UNIT BEFORE Service CLEANING AND DISCONNECT THE MAINS. DO NOT, Data UNDER ANY CIRCUMSTANCES, IMMERSE THE Displayed...

  • Page 44: Cleaning The Patient Cable

    Care & Maintenance Cleaning the Patient Cable Cleaning the Thermal Print Head If the printer is used a lot, a residue of printers ink ( from the grid on ALIGN THE LEADS IN SUCH A WAY AS TO PREVENT ANYONE the paper) can build up on the print head.

  • Page 45: Replacing The Recording Paper

    AT-2plus 6-Channel ECG Unit - USER GUIDE Replacing the Recording Paper The recording paper must be replaced as soon as the end of the paper is indicated by a red stripe on the lower edge. After the indication first appears, there are about 8 pages left.

  • Page 46: Thermal Paper Handling

    • Press the STOP key to transport the paper to the start position. WELCH ALLYN SCHILLER can only guarantee perfect printouts when WELCH ALLYN SCHILLER original chart paper or chart paper of the same quality is used.

  • Page 47: Fault Diagnosis

    Check Settings - ensure that at least one item is selected for print after an auto ECG is recorded Ensure that the automatic sensitivity reduction is not switched off. Contact your local WELCH ALLYN SCHILLER representative. Reset signals to baseline - press the 1mV key Check electrode contact...
  • Page 48 Fault Diagnosis Printout fades or is not clear No printout of interpretations statement or measurements Ensure that fresh WELCH ALLYN SCHILLER Check that the interpretation and measurement paper is installed. options are enabled for the printout. Note that the thermal paper used for the AT- 2plus is heat and light sensitive.

  • Page 49: Technical Data

    AT-2plus 6-Channel ECG Unit - USER GUIDE Technical Data Technical data subject to change without notice. Recording Tracks 6 channels, positioned at optimal width on Dimensions 400 x 330 x 100 mm 200 mm, automatic baseline adjustment Weight 5.0 kg ( 5.35 kg with full paper tray) Automatic Lead Programs Mains Supply 100 to 115 / 220 to 240 VAC, 50/60 Hz...
  • Page 50 Technical Data Safety Standard: CF according to IEC and complying with ECG Amplifier: Simultaneous, synchronous registration of the following all 9 active electrode signals (= 12 standard leads) RL 93/42/EEC Sampling frequency: 1000 Hz EN 60601-1:1990 Digital resolution: 5 µV IEC 601-1 Dynamic range: ±9.5 mVAC...

  • Page 51: Available Configurations

    AT-2plus 6-Channel ECG Unit - USER GUIDE Technical Data Environmental Conditions: Temperature, Operating: 10 to 40 Temperature, Storage: -10 to 50 Relative humidity: 25 to 95% (non condensing) Atmospheric pressure: 700 to 1060 hPa Control Panel: Rubber keys Technical data subject to change without notice. Available Configurations The AT-2plus is available in two versions: Standard Version:Unit with ECG recording and printout...

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