Piston PDD-401 User manual

Operation Manual for
Audiometer
PDD-401
PISTON Ltd.
1121 Budapest Pihenőút 1. „C” pavilon
v.3.080
0197

Table of Content - 1
Table of Content
TABLE OF CONTENT............................................................................................................1
QUICK PREVIEW...................................................................................................................3
INSTALLATION .............................................................................................................................3
DAILY ROUTINE...........................................................................................................................4
ICON DESCRIPTIONS...........................................................................................................5
SCREEN .......................................................................................................................................7
INTRODUCTION.....................................................................................................................9
INSTALLATION AND CONFIGURATION.......................................................................11
INSTALLATION OF PDD-401 AUDIOMETER.................................................................................12
MINIMUM PC CONFIGURATION ..................................................................................................12
SOFTWARE INSTALLATION .........................................................................................................13
CONFIGURING THE AUDIOMETER................................................................................................13
AUDIOMETER CALIBRATION.......................................................................................................14
AUDIOMETER ......................................................................................................................17
SELECTION OF MEASURING METHOD..........................................................................................17
Measuring mode...................................................................................................................17
Signal type............................................................................................................................18
ASCENDING ALGORITHM............................................................................................................19
DESCENDING ALGORITHM..........................................................................................................20
CONFIGURATION OF AUTOMATIC SEQUENCE..............................................................................21
First ear to be examined ......................................................................................................21
Type of iteration...................................................................................................................22
Test frequencies....................................................................................................................22
Number of trials...................................................................................................................22
Criteria of acceptance..........................................................................................................22
Allowed tolerance ................................................................................................................23
Error messages ....................................................................................................................23
Set default values .................................................................................................................23
MANUAL MODE..........................................................................................................................23
ASCENDING ALGORITHM............................................................................................................24
DESCENDING ALGORITHM..........................................................................................................25
AUTOMATIC SEQUENCE .............................................................................................................25
POSSIBLE ERROR MESSAGES ......................................................................................................26
MEASUREMENT STORAGE..........................................................................................................27
COMMENT .................................................................................................................................27
EXPORTING DATA TO AN EXCEL WORKBOOK .............................................................................27
REPORT..................................................................................................................................29

2 - Table of Content
REPORT PREVIEW.......................................................................................................................29
REPORT PRINT............................................................................................................................29
REPORT CONTENTS ....................................................................................................................29
MAINTENANCE....................................................................................................................31
DISINFECTING COMPREHENSIVE TABLE......................................................................................31
POSSIBLE PROBLEMS AND SOLUTIONS......................................................................33
AUDIOMETER.............................................................................................................................33
MISCELLANEOUS .......................................................................................................................34
TECHNICAL SPECIFICATIONS........................................................................................37
GUARANTEE ..............................................................................................................................37
LIMITED LIABILITY.....................................................................................................................37
SAFETY PRECAUTIONS ...............................................................................................................37
ENVIRONMENTAL CONDITIONS ..................................................................................................38
ELECTRICAL SAFETY..................................................................................................................38
ELECTRICAL DATA.....................................................................................................................39
MECHANICAL DATA...................................................................................................................39
GENERAL VALUES......................................................................................................................39
GUARANTEED VALUES...............................................................................................................39
ACCESSORIES ............................................................................................................................40

Quick preview - 3
Quick preview
Installation
* Marked items can be used only in Database version
Connecting the Device
(
see: 12
p
a
g
e
)
Software installation
(see: Users’ Manual of Database)
Start panel*
(see: Users’ Manual of Database)
Location of database
(see: Users’ Manual of Database)
Physicians’ data*
(see: Users’ Manual of Database)
Configuration of the Device
(see: 13 page)
Creation and selection of database
(see: Users’ Manual of Database)
Data of Institution*
(see: Users’ Manual of Database)

4- Quick preview
Daily Routine
*- Marked items can be used only in Database version
New patient
Retrieval from Database * (see: Users’ Manual of Database)
Enter to the Database*
(see: Users’ Manual of Database)
Yes
No
Run the program
Open Database* (see: Users’ Manual of D
a
tabase)
Signal selection (see: 17 pagel)
Measurement (see: 22 - 24 page)
Algorithm selection (see: 16 page)
Comment* (see: 25 page)
Print results (see: 27 page)
Save results (see: 25 page)
Close patients’ window*
Exit Program
Finished?
Yes
No

Icon descriptions - 5
Icon descriptions
Audiometer
Print
Exit
Microphone
Manual mode
Ascending algorithm
Descending algorithm
Automatic sequence
Continuous sound
Single Pulse sound

6 - Icon descriptions
Continuous Pulse sound
Saving the examination
Comment
Sending data to an Excel workbook
View current and previous comments
Step back in print preview
Step forward in print preview
Full page view in print preview
Two page view in print preview
Exit from print preview

Icon descriptions - 7
Screen

Screen
8 - Icon descriptions

Introduction - 9
Introduction
The PDD-401 is an IBM/PC based screening audiometer for
air conductive testing the hearing system.
There are two versions of the program one is the modular
version and the other one is with database management.
The modular version can be called from the host system. In this
case the host system has its own database management.
The database version has an integrated database management
system.
The PDD-401 makes easy to measure the hearing level. It is
well suited for screening and following up changes in hearing
level.
Thanks to the IBM/PC base it is easy to handle but at the
same time offers a lot of features. During measurement the
hearing level is shown in real time. Results can be printed out
even in colours.
The PDD-401 screening audiometer provides the following
modes and services:
•Manual mode
•Ascending algorithm
•Descending algorithm
•Automatic sequence
•Continuous signal
•Impulse signal
•Continuous interrupted signal

10 - Introduction

Installation and configuration - 11
Installation and configuration
The safety precautions in this chapter must be followed!
The Piston Ltd. or its authorised distributors or their
authorised staff may only install the Audiometer system. The
above mentioned companies only accept liability for their
installations.
Before operating the Audiometer system, the user has to
make sure that the computer and monitor to be used as medical
electronic device has license issued by local authorities or the
user declares full responsibility for safety.
The installation should be done in a way that the patient was
at least 1.5m distance from all the devices, which are in direct
electronic contact with the PC.
In case of faulty equipment, design modification or any other
reason the devices in the system (computer, monitor, printer)
may only be exchanged, if the new device(s) has the same safety
class as the original device, and the sign mentioned above is
also applied to the new device(s).
The user has to be instructed about the safety precautions by
the person performing the installation. This instruction also
includes the review of this chapter. The user certifies the
performance of this instruction in writing.

12 - Installation and configuration
Installation of PDD-401 audiometer
Connect the audiometer to a free
USB port of the IBM/PC
Connect the patient feed back
switch to the audiometer
Connect the headphone set to
the audiometer.
Minimum PC configuration
The following minimum configuration is required to run the
program:
•Intel or AMD processor 1 GHz
•256 MB RAM
•Colour monitor with 800x600 resolution and 256 colour
and VGA video card
•30 MB free space on the hard disk drive
•Windows compatible printer
•Mouse
•One free USB port
•Windowx XP Professional or Home operational system

Audiometer calibration
Installation and configuration - 13
Software installation
Connect the audiometer to a free USB port of the PC. The
Windows XP recognizes the new USB device and asks for the
driver. Insert the system CD to the CD drive and the Windows
XP finds the appropriate drivers. In some cases a messages may
appear which has to be neglected.
Run the SETUP.EXE from the system CD/Programs/32 bit
Configuring the audiometer
In case of a Database version select from the [Database]
menu the [Settings] sub-menu and the [Audiometer
configuration…] item.
In the case of Module version select from [Audiometer]
menu the [Settings] sub-menu and [Audiometer
configuration…] item. The following will appear on the
screen:
Select the Communication port from the rolling down list:
USB port you have connected the audiometer. Then press the
[Check] button.
If everything is correct, press the [OK] button. Pressing the
[Cancel] button exits without saving the changes.

14 - Installation and configuration
Audiometer calibration
In a case of Database version, the correctional values have to
be entered, based on the calibration report, which included to
the equipment. From the [Database] menu select the [Settings]
sub-menu, and the [Audiometer calibrating…] item.
In a case of Module version select from [Audiometer] menu
the [Settings] submenu and the [Audiometer calibrating…]
item.
The following will appear on the screen:
We are not responsible for any incorrect measurements, if the
correct values based on the calibration report have not been
entered here.
Prior to enter the calibration values selects the type of SPL
standard. The following options are provided:
•IEC 645-1 For Europe and USA
•SABS 0154 For South Africa
To return to the original factory settings push the [Default
settings] button.
Enter values from the Average Measured SPL row of the
calibration table to the [Measured SPL] column.
If the user’s internal regulations do not prescribe in a
different way, audiometers should be re-calibrated annually.

Installation and configuration - 15
Calibration procedure should be done by a validated sound
pressure meter.
After calibration enter correction values into to the table of
[Audiometer calibration]. Push the [OK] button to validate
changes or the [Cancel] button to abandon changes. If any
change occurred to the values the following message appears:
Do you want to save modifications?
If everything is correct, press the [OK] button. Pressing the
[Cancel] button exits without saving the changes.

16 - Installation and configuration

Audiometer - 17
Audiometer
The patient’s hearing threshold can be determined at
different frequencies with the audiometer. The program knows
all the standard frequencies. The sound pressure may be
selected from –10 dB to +110 dB. Start the audiometer by
pressing the audiometer button. The following will appear
on the screen:
Selection of measuring method
Prior to measurement select the method:
•Measurement mode
•Signal type
Measuring mode
The system provides the following modes:
•Manual mode
•Ascending iteration
•Descending iteration
•Automatic sequence
Manual mode User gives the sound pressure and frequency.

Selection of measuring method
18 - Audiometer
Ascending iteration
In the ascending iteration the sound level is raised from the
unheard level to the level when the patient indicates that the
sound is heard already.
Descending iteration
In the descending iteration the sound level is decreased from
the well heard level to the level when the patient indicates that
the sound is not heard yet.
Automatic sequence
According to the pre set sequence both ears are tested fully
automatically.
Signal type The system provides the following types of signal
•Continuos
•Impulse
•Interrupted
Continuos The signal is generated continuously. The continuos signal is
available only in Manual mode.
Impulse The signal is generated for 1-2 second intervals. The Impulse
signal is available for all modes.
Interrupted The signal generated continuously but interrupted regularly.
The interrupted signal is available only in Manual mode.

Audiometer - 19
Ascending algorithm
Yes
Yes
No
Frequency selection
Signal is heard? No
Signal is heard?
Yes
Signal is heard?
No
Does the number of
equivalent sound levels reach
the desired quntity?
Finished
The hearing level is defined
Does the number of trials
reach the prescribed quanity?
No
Invalid
There are not enough equivalent
hearing levels!
Yes
Yes
Igen
No
Sound pressure decreased by 20dB
Sound pressure increased by 10dB
Sound pressure increased by 5dB
Sound pressure decreased by 10dBRecord the sound level
Signal is heard?
No
Set starting sound pressure