Diagnostic Audiometer AD629 Operation Manual Rev 2 ver Jan 2013

Table of Contents 1

2

3

Introduction ... 1 1.1 Intended Use ... 1 1.2

Precautions ... 1

1.3

Warranty... 2

1.4

Safety Regulations ... 3

1.5

List of Symbols ... 4

1.6

Manufacturer ... 4

Unpacking/Inspection ... 5 2.1 Check Box and Contents for Damage ... 5 2.2

Store Carton for future Shipment ... 5

2.3

Contents of Shipment ... 5

2.4

Reporting Imperfections... 5

2.5

Care and Maintenance ... 6

2.6

How to clean Interacoustics Products ... 6

Getting Started: Setup and Installation ... 7 3.1 Back Panel External Connections – Standard Accessories ... 8 3.2

PC-Interface ... 8

4

Functions of Buttons ... 9 4.1 AD629 Versions ... 12

5

Patient Communication ... 13 5.1 Talk Forward ... 13 5.2

6

Client and Session Handling ... 15 6.1 Saving Sessions and Creating Clients... 15 6.2

7

Talk Back ... 13

Viewing Stored Sessions ... 16

Pure Tone Presentation ... 19 7.1 General about Air and Bone Conduction ... 19 7.2

Common Test Use ... 19 7.2.1

Insert Earphones ... 20

7.2.2

Tone/Warble... 20

7.2.3

Pulsed Tones ... 20

7.2.4

Free Field ... 20

7.2.5

Extended Range ... 21

7.2.6

Attenuator Steps ... 21

7.2.7

Measurement Type ... 21

7.2.8

Tone Tests... 21

7.2.9 7.3

7.4

8

Manual Air Conduction Testing ... 22 7.3.1

Headphone Placement ... 22

7.3.2

Background Noise ... 22

7.3.3

Instruction to Subject ... 22

7.3.4

Familiarization ... 22

7.3.5

Threshold Determination using the Ascending Method ... 22

Bone Conduction ... 23 7.4.1

AC-BC Gap ... 23

7.4.2

Cross Damping (BC) ... 23

Masking ... 25 8.1 General Considerations about Masking ... 25

8.2 9

High Frequency Audiometry (optional license) ... 21

8.1.1

Cross Damping ... 25

8.1.2

Normal Masking ... 25

8.1.3

Masking using Insert Earphones ... 25

8.1.4

Over Masking ... 25

8.1.5

Synchronous Masking ... 25

8.1.6

Masking Information ... 26

8.1.7

Minimum masking Level for Masking out the Sound in the non-test Ear ... 26

8.1.8

Maximum Masking ... 27

Masking Procedure- Step by Step (Hoods Plateau)... 27

Speech Testing ... 29 9.1 General info about Speech Audiometry ... 29 9.2

9.3

General Speech Testing ... 29 9.2.1

Speech Audiometry in Graph Mode ... 30

9.2.2

Speech Audiometry in Table mode ... 31

9.2.3

Input Level for Speech Presentation ... 31

9.2.4

Speech Recognition Threshold (SRT) ... 31

9.2.5

Automatic Speech Scoring ... 32

9.2.6

Number of words... 32

9.2.7

Use of the 2nd Channel (e version only) ... 32

9.2.8

Masking and Speech ... 32

Speech Testing using Wave files (Pre-recorded speech material) ... 33 9.3.1

9.4

Installing Wave files ... 34

Speech Testing with external CD or MP3 Player ... 35

10 Settings/Setup and User Protocols ... 37 10.1 Tone Settings and User Protocols ... 37 10.2

Speech Settings and User Protocols ... 40

10.3

Common Instrument Settings ... 41

10.4

Installing Print Logo, Symbols and Wave files (Pre-recorded speech) ... 43 10.4.1 Print Logo and Audiogram Symbols ... 43 10.4.2 Wave files (Pre-recorded speech) ... 43

11 Other (Special) Tests ... 45 11.1 Auto Threshold Hughson Westlake (HW)... 45 11.2

Békésy... 46

11.3

ABLB... 47

11.4

Stenger Test ... 48

11.5

Tone in Noise ... 49

11.6

Master Hearing Aid... 50

11.7

SISI (Short Increment Sensitivity Index) ... 51

11.8

QuickSIN ... 51

12 Parts List ... 53 13 Diagnostic suite with AD629 ... 55 13.1 Instrument setup ... 55 13.1.1 SYNC Mode ... 56 13.1.2 The Sync Tab ... 56 13.1.3 Client Upload ... 57 13.1.4 Session download ... 57 14 Technical Specifications ... 59 Common AD629 Use Scenarios ... 66 Appendix A Appendix B Appendix C Appendix D

General maintenance Survey of Reference and max Hearing Level Tone Audiometer Pin Assignment Common AD629 Use Scenarios

1 Introduction 1.1

Intended Use

1.2

Precautions

The AD629 diagnostic audiometer is designed to be a device for diagnosing hearing loss. Output and specificity of this type of device are based on the test characteristics defined by the user, and may vary depending on environmental and operating conditions. The diagnosing of hearing loss using this kind of diagnostic audiometer depends on the interaction with the patient. However, for patients not responding well possibilities of various tests allow the tester to have at least some evaluative result. Thus, a “normal hearing” result should not allow for ignoring other contra indications in this case. A full audiologic evaluation should be administered if concerns about hearing sensitivity persist. The AD629 audiometer is intended to be used by an audiologist, hearing healthcare professional or trained technician in an extremely quiet environment. Careful handling of the instrument whenever in contact with a patient should be of high priority. Calm and stable positioning while testing is preferred for optimal accuracy. It is recommended that the instrument be operated with an ambient temperature range of 15-35 degree Celsius (59-95 degrees Fahrenheit).

Indicates a hazardous situation which, if not avoided, could result in death or serious injury. Used with the safety alert symbol, indicates a hazardous situation which, if not avoided, could result in minor or moderate injury. is used to address practices not related to personal injury

1. No modification of this equipment is allowed without Interacoustics authorization. Interacoustics will make available on request circuit diagrams, component part lists, descriptions, calibration instructions, or other information that will assist service personnel to repair those parts of this audiometer that are designated by the Interacoustics as repairable by service personnel

1. Never insert or in any way use the insert headset without a new clean non defect test tip. If this apparatus is connected to one or more other devices with medical CE marking, to make up a system or pack, the CE marking is only valid also for the combination if the supplier has issued a declaration stating that the requirements in the Medical Device Directive article 12 are fulfilled for the combination. 2. It is recommended that parts which are in direct contact with the patient (e.g. earphone cushions) are subjected to standard disinfecting procedure between patients. This includes physically cleaning and use of a recognized disinfectant. Individual manufacturer's instruction should be followed for use of this disinfecting agent to provide an appropriated level of cleanliness. 3. It is recommended that the disposable foam ear tips supplied with the optional EarTone5A insert transducers are replaced after each patient tested. Disposable plugs also insure that

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sanitary conditions exist for each of your patients, and that periodic cleaning of a headband or cushion is no longer required. • • • • • •

The black tubing protruding the foam ear tip is attached to the sound tube nipple of the insert transducer. Roll the foam tip into the smallest possible diameter. Insert into the ear canal of the patient. Hold the foam tip until expanded and a seal is achieved. After testing the patient the foam tip including the black tubing is detached from the sound tube nipple. The insert transducer should be examined prior to attaching a new foam tip.

1. Be sure to use only stimulation intensities, which will be acceptable for the patient. 2. The transducers (headphones, bone conductor, etc.) supplied with the instrument are calibrated to this instrument - exchange of transducers requires a new calibration. 3. Although the instrument fulfils the relevant EMC requirements precautions should be taken to avoid unnecessary exposure to electromagnetic fields, e.g. from mobile phones etc. If the device is used adjacent to other equipment it must be observed that no mutual disturbance appears.

4. Within the European Union it is illegal to dispose electric and electronic waste as unsorted municipal waste. Electric and electronic waste may contain hazardous substances and therefore has to be collected separately. Such products will be marked with the crossed-out wheeled bin shown below. The cooperation of the user is important in order to ensure a high level of reuse and recycling of electric and electronic waste. Failing to recycle such waste products in an appropriate way may endanger the environment and consequently the health of human beings. 5. To prevent system faults take appropriate precautions to avoid PC viruses and similar.

1.3

Warranty

INTERACOUSTICS warrants that:  The AD629 is free from defects in material and workman ship under normal use and service for a period of 24 months from the date of delivery by Interacoustics to the first purchaser. 

Accessories are free from defects in material and workmanship under normal use and service for a period of ninety (90) days from the date of delivery by Interacoustics to the first purchaser.

If any product requires service during the applicable warranty period, the purchaser should communicate directly with the local Interacoustics service centre to determine the appropriate repair facility. Repair or replacement will be carried out at Interacoustics’ expense, subject to the terms of this warranty. The product requiring service should be returned promptly, properly packed, and postage prepaid. Loss or damage in return shipment to Interacoustics shall be at purchaser's risk. In no event shall Interacoustics be liable for any incidental, indirect or consequential damages in connection with the purchase or use of any Interacoustics product.

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This shall apply solely to the original purchaser. This warranty shall not apply to any subsequent owner or holder of the product. Furthermore, this warranty shall not apply to, and Interacoustics shall not be responsible for, any loss arising in connection with the purchase or use of any Interacoustics product that has been:  repaired by anyone other than an authorized Interacoustics service representative;  altered in any way so as, in Interacoustics judgement, to affect its stability or reliability;  subject to misuse or negligence or accident, or which has had the serial or lot number altered, effaced or removed; or  improperly maintained or used in any manner other than in accordance with the instructions furnished by Interacoustics. This warranty is in lieu of all other warranties, express or implied, and of all other obligations or liabilities of Interacoustics, and Interacoustics does not give or grant, directly or indirectly, the authority to any representative or other person to assume on behalf of Interacoustics any other liability in connection with the sale of Interacoustics products. INTERACOUSTICS DISCLAIMS ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FOR FUNCTION OF FITNESS FOR A PARTICULAR PURPOSE OR APPLICATION.

1.4

Safety Regulations

Electrical Safety:

This audiometer is specified to comply with the international standard IEC 60601-1.

This audiometer is guaranteed according to IEC 60601-1 safety against electrical hazard only when the connected notebook/computer is powered by batteries or the computers power supply complies with IEC 60601-1 safety regulations.

To avoid the risk of electric shock, this equipment must only be connected to supply mains with protective earth." This audiometer is not suitable for operation in an oxygen rich environment, in conjunction with flammable agents or flammable anesthetics.

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1.5

List of Symbols

Symbol

Explanation Type B applied parts. Patient applied parts that are not conductive and can be immediately released from the patient. Refer to instruction manual WEEE (EU-directive) This symbol indicates that when the end-user wishes to discard this product, it must be sent to separate collection facilities for recovery and recycling. The CE-mark indicates that Interacoustics A/S meets the requirements of Annex II of the Medical Device Directive 93/42/EEC. TÜV Product Service, Identification No. 0123, has approved the quality system.

0123

Year of manufacture

1.6

Manufacturer

Interacoustics A/S Drejervænget 8 DK 5610 Assens Denmark Phone: Fax:

+45 6371 3555 +45 6371 3522

E-mail:

[email protected]

Web:

www.interacoustics.com

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2 Unpacking/Inspection 2.1

Check Box and Contents for Damage

2.2

Store Carton for future Shipment

2.3

Contents of Shipment

When the instrument is received please check the shipping box for any rough handling or damage. If the box is damaged it should be kept until the contents of the shipment have been checked mechanically and electrically. If the instrument is faulty, please contact the nearest service office. Keep the shipping material for the carrier’s inspection and insurance claim.

The AD629 comes in its own shipping carton which is specially designed for the AD629. Please store this carton; it will be needed if the instrument has to be returned for service. If service is required please contact your nearest sales and service office. As standard, AD629 is delivered with the following: Included parts

DD45 Audiometric headset B71 Bone conductor APS3 Patient response button Goose neck microphone Power cable Operation manual CD Multilingual CE instructions for use

Optional parts

Diagnostic Suite software OtoAccess database 21925 Amplivox audiocups, noise reducing headset Carrying case (Standard or Trolly Style) EARTone3A/5A Audiometric insert phones HDA200 Audiometric headset with double mono 6.3mm jack TDH39 Audiometric headset HDA280 Phone headset with double mono 6.3mm jack CIR33 Insert earphone set for masking or monitoring Talk back microphone Sound field speakers SP90 (with external power amp) AP12 Power Amplifier 2x12 Watt AP70 Power Amplifier 2x70 Watt

Check numbers on AD629 The identification label on the connection panel holds the serial number. This should be checked with the manual number and written down for later service claims.

2.4

Reporting Imperfections

Inspect before connection: Prior to connecting the AD629 to the Power Supply it should be inspected once more for damage. All of the cabinet and the accessories should be checked visually for scratches and missing parts. Report any faults immediately: Any missing part or malfunction should be reported immediately to the supplier of the instrument together with the invoice, serial number and detailed report of the problem. In the back of this manual a “Return Report” can be found, where you can describe the problem. Please use “Return Report”: Please realize that if the service engineer does not know what the problem is to look for, he may not find it. Therefore using the Return Record will be of great help to us and at the same time it is guaranteed that the correction to your problem will be to satisfaction.

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2.5

Care and Maintenance

The performance and reliability of the AD629 will be prolonged if the following recommendations for care and maintenance are adhered to: Great care when handling the headset: Great care should be considered when handling the headset as dropping it may alter the calibration. Annual Calibration: The AD629 had been designed to provide many years of reliable service, but annual calibration is recommended due to possible impact on transducers. We also required calibrating the AD629; if something drastic happens to a part of it (e.g. headset or bone conductor is dropped on a hard surface).

2.6

How to clean Interacoustics Products

 Before cleaning always switch off and disconnect from the power supply  Use a soft cloth lightly dampened with cleaning solution to clean all exposed surfaces  Do not allow liquid to come in contact with the metal parts inside the earphones / headphones  Do not autoclave, sterilize or immerse the instrument or accessory in any fluid  Do not use hard or pointed objects to clean any part of the instrument or accessory  Do not let parts that have been in contact with fluids dry before cleaning  Rubber ear-tips or foam ear-tips are single use components  Ensure that isopropyl alcohol does not come into contact with any screens on the instruments  Ensure that isopropyl alcohol does not come into contact with any silicone tubes or rubber parts Recommended cleaning and disinfection solutions:   

Warm water with mild, nonabrasive cleaning solution (soap) Normal hospital bactericides 70% isopropyl alcohol only on hard cover surfaces

Procedure   

AD629

Clean the instrument by wiping outer case with a lint free cloth lightly dampened in cleaning solution. Clean cushions and patient hand switch and other parts with a lint free cloth lightly dampened in cleaning solution. Make sure not to get moisture in the speaker portion of the earphones and similar parts

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3 Getting Started: Setup and Installation The following shows an overview of the AD629:

Monitor speaker

Back Panel - connectors Power on/off

Microphone and Headphone (Headset) mini jacks

Front Panel display & buttons/dials

Talk forward mic.

The top left part of the AD629 (display holder) contains monitor speaker. The left side of the instrument contains two mini jack connectors for a microphone and a headphone – or a headset. This is used for talkback headphone/speaker (TB) and talk forward microphone (TF). A goose neck microphone can be plugged into the top part of the instrument just above the Talk Forward button. This can be used for talk forward. When not plugged in the goose neck microphone can be placed underneath the display. Please refer to the section about patient communication for more details. The upper right side of the instrument holds the on/off switch of the instrument.

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3.1

Back Panel External Connections – Standard Accessories

The back panel contains all the rest of the main connectors (sockets):

USB B Connector for PC Connection

Power connector

3.2

4 USB connectors for printer, PCconnection & keyboard

LAN (for future use)

Standard Headphones DD45/TDH39/ HDA200

Free Field 1 and 2 (external amplification)

Bone conductor B71

Standard Insert Phone EarTone 3A

Insert masking

Patient Response Switch

Extra Talk forward mic., e.g. for table mic.

For Talk Back Mic.

External CD / MP3 input

PC-Interface

Please refer to the Diagnostic Suite operation manual regarding on-line and PC-operated mode as well as patient/session data transfer.

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4 Functions of Buttons The figure below shows the outline of the front plate of the AD629 including buttons, dials and display:

(5)

(6) (4)

(4)

(3) (2)

(1)

(15)

(16)

(7) (8) (9) (10) (11) (12) (13) (14)

(17) (18) (19) (20)

(21)

(22)

(23)

(24)

(25)

(29)

(30)

(31)

(32)

(41)

(42)

(26)

(33)

(34)

(37)

(38)

(39)

(40)

(27)

(28)

(35)

(36)

(43)

The following table describes the functions of the various buttons and dials. Name(s)/Function(s)

Description

1

Microphone

For live voice speech and talk forward instruction to the patient in the test cabin. (Please find it behind the display if it’s not already connected.) See 21.

2

Talk back Speaker

For speech feedback from the patient in the test cabin.

3

Color Display Screen

For displaying the different test screens. Will be further explained in the sections describing the individual tests.

4

Tone and Response Indicator

Indication light seen when a tone is presented to the patient. Indication light seen when the patient activates the patient signal using the patient response.

5

Channel 1

Indicates intensity level for channel 1, e.g.:

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6

Masking / Channel 2

Indicates masking or Intensity level for channel 2, e.g.:

7-14

Function Keys

These keys are context sensitive and depend on the selected test screen. Will be further explained in the sections describing the individual tests.

15

Shift

The shift function will enable the clinician to activate the sub functions written in italic underneath the buttons.

16

Setup

Allows the clinician to make changes in certain settings within each test. By default it will enter the settings of the actual (selected) test, e.g. Tone. To change the setting of another test hold down the Setup button and use the left dial to select the individual test settings. This Common instrument setting is also accessed from here. To save the changes as default (for the next session) press SaveAs (14). Please refer to the Settings/Setup section on how to create multiple user settings (protocols). Choose between the different settings using the right rotary wheel (43). Change the individual settings using the left rotary wheel (41).

17

Tests

This is also where the special tests are accessed: Hold down the Tests button and use left dial to select the individual tests.

18

Delete / del curve

Delete points during testing delete. Delete the entire test curve of a graph by holding “Shift (15)” together with this button.

19

Save Session/ New Session

Saving a session after testing or alternatively add a new session by holding the “Shift (15)” together with this button. (A new session will recall the default settings saved)

20

Print Clients

Allows results to be printed directly after testing (via a supported USB printer). Press ”Shift (15)+Print” to access the clients stored on the device.

21

Talk Forward

Instruction to the patient directly through his headphones via the microphone can be given. The intensity changes by turning the “HL dB” (41) while holding the “Talk Forward” button. See 1.

22

Tone / Warble

Pure tones or warble tones can be chosen as stimuli by activating this button once or twice. The stimuli chosen will be shown on the display, e.g.:

23

Wave file

Enables one to perform speech testing using loaded wave files, i.e. pre-recorded speech material. Please see setup under Setup (15). Requires installation of speech material.

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24

Mic

For live speech testing through the microphone (1). The VU meter can be seen on the display screen. Adjust the microphone gain by holding down the Mic button for one second.

25

1 CD 2

By pressing this function once or twice it is possible to have recorded speech in either channel 1 or channel 2 separately. Adjust the gain of CD 1 and 2 by holding down the CD button for one second.

26

Ext Range

Extended Range: Usually the maximum output is e.g. 100dB but if a higher output e.g. 120 dB is needed then “Ext Range” can be activated when reaching a certain level.

27

Ch 1 Monitor 2

With the activation of this button, presentation to the patient from e.g. CD can be heard through the built in monitor of the AD629 or monitor headset in both channel 1 or 2. Adjust the gain by holding down the button for one second.

28

Talk Back

Talk back, when active allows the clinician to hear comments or responses from the patient through the AD629 or monitor headset. Adjust the gain by holding down the button for one second.

29

Right / Insert

For selecting the right ear during testing. Insert phones for the right ear can be activated by pressing twice (can only be selected when calibrated).

30

Left / Insert

For selecting the left ear during testing. Insert phones for the left ear can be activated by pressing twice (can only be selected when calibrated).

31

R Bone L

For bone conduction testing (can only be selected when calibrated).  First push: selects the right ear for testing.  Second push: selects the left ear for testing.

32

1 FF 2

Pressing “1 FF 2” will select free field speaker as output for Channel 1 (can only be selected when calibrated).  First push: Free Field speaker 1  Second push: Free Field speaker 2

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33

Man / Rev

Manual / Reverse tone presentation modes:  First push: Manual tone presentation each time “Tone Switch” (42) is activated.  Second push: The reverse function- continuous tone presentation which will be interrupted each time “Tone Switch” (42) is activated.

34

Single / Multi

Pulsing modes:  First push: the tone presented will have a pre-set length when “Tone Switch” is activated. (Set up in the “Setup” (16)).  Second push: the tone will be pulsing continuously.  Third push: returns back to normal mode.

35

Mask On/Off

Masking channel on/off:  First push: turns masking on  Second push: turns masking off

36

Sync

This allows the masking attenuator to the tone attenuator to be activated. This option is used for e.g. synchronous masking.

37

Store

Use this function to store test thresholds / results.

38

No Resp

Use this function if the patient has shown no response to stimuli.

39

Down / Incorrect

Used to decrease the frequency level. The AD629 has an incorporated automatic speech score counter. Therefore as a second function you can use this button as an “Incorrect” button when performing speech tests. For automatic speech score counting while testing speech push this button after each word not heard correctly by the patient.

40

Up / Correct

Used to increase the frequency level. The AD629 has an incorporated automatic speech score counter. Therefore as a second function you can use this button as a “Correct” button when performing speech tests. For automatic speech score counting while testing speech push this button after each word heard correctly by the patient.

41

HL db Channel 1

This allows for the adjusting of the intensity in channel 1 shown at (5) in the display.

42

Tone Switch / Enter

Used for tone presentation where the “Tone” light (4) will show. Can also be used as “Enter” (selection) button.

43

Masking Channel 2

Adjust the intensity level in channel 2 or masking levels when masking is used. Shown at (6) in the display.

4.1

AD629 Versions

AD629 come in different versions, so all the special tests presented in this manual may not be available on your instrument. High Frequency (8-20 KHz) and two-way PC-connectivity (online mode and PC-operated mode via the Diagnostic Suite) can be added by additional licenses. Please refer to the Diagnostic Suite operation manual regarding on-line and PC-operated mode as well as patient/session data transfer.

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5 Patient Communication The operator may communicate with the patient using Talk Forward (when speaking to the patient) and Talk Back (when listening to the patient). Please find the connection overview in the previous section.

5.1

Talk Forward

Talk Forward is activated by the “Talk Forward” button (21). AD629 contains three microphone connectors which will work in the following priority (depending on which one(s) is connected):  Priority 1: The mini jack in the left side of the instrument – can be used with a headset together with the headphone connector. This has the first priority.  Priority 2: The swan neck microphone (1) of the AD629 is located above the “Talk Forward” (21) button. If no mic. is connected to the priority 1 mic., this will be used.  Priority 3: The pack panel contains a “Mic 2” mini jack connector that can also be used for talk forward, e.g. with an external table mic. If no mic. is connected to the priority 1 or 2 mic., this will be used. The image below will be shown while the talk forward is active (by hold the button down) where the calibration (gain) level and intensity level for patient communication can be adjusted. To change the calibration level the clinician would adjust the HL db dial (41) to the appropriate level. To adjust the Intensity level the dial in channel 2 (43) would be used.

5.2

Talk Back

The operator may use Talk Back in one of the following ways:  If no headphone is connected to the Talk Back (left side connector), the voice is wired through the Talk Back speaker next to the display (2).  If a headphone/headset is connected to the instrument, talk back with come through this instead.

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6 Client and Session Handling This section describes how to store clients and sessions and how to view stored data.

6.1

Saving Sessions and Creating Clients

Test results can be saved by selecting “Save Session” (19). First a dialog with the list of clients is presented:

To create a new client, click “Save Session” then “New”. There may be 500 patients saved in the AD629 memory. Each client can have a number (in theory unlimited) of sessions (i.e. measurement test data) stored under it. Use the main dial (41) to scroll up and down in the list of clients. If you want to create a new client, press “New” and the following patient creation dialog appears:



AD629

Use the two dials (41) (43) to move the cursor to select the appropriate number/letter. Press the Tone Switch / Enter button (42) to choose number/letter.

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Press Next to go to next dialog. Finally Press Save to store the session under the newly created (selected) client. To edit or delete clients use: Edit or Delete.

  

6.2

Viewing Stored Sessions

To view a stored session (audiogram test data) for a specific client press “Shift (15)” + “Print (20)” (subject ‘clients’).A dialog with the clients stored on the AD629 will be shown:

Press to view the session for the selected client. The list of session data stored under the clients name will then be shown – here 6 sessions are stored at different dates:

The following options are now available – using function keys:

“Delete” (11) is used to delete old sessions. “Trans” (12) is used to transfer old sessions to the current session. “View” (13) is used for viewing stored sessions. “Back” (14) is used to go back to the client list view. When viewing a stored session the follow screen is presented.

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