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Summary of Contents for GSi 18
- Page 1 GSI 18 ™ UsER MaNUal Part Number 1718-0100 Rev E Setting The Clinical Standard www.grason-stadler.com Grason-Stadler, 7625 Golden Triangle Drive, Suite F, Eden Prairie MN 55344 800-700-2282 • 952-278-4402 • fax 952-278-4401 • e-mail info@grason-stadler.com...
- Page 2 GSI 18 GSI 18 User Manual Title: Copyright © 2011 Grason-Stadler Inc. All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means without the prior written permission of Grason-Stadler Inc. The information in this publication is proprietary to Grason-Stadler.
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Page 3: Supplied Accessories
Check that all accessories itemized in Accessories supplied below are received in good condition. If any accessories are missing, contact GSI immediately. See the Specifications section for the catalog numbers of accessories and also for a listing of optional accessories. -
Page 4: Safety Summary
Safety Notes WARNING The GSI 18 is designed for compliance to IEC and UL 60601-1 when used in the patient vicinity. The GSI 18 is equipped with a specific power transformer (pn: UE100503HKKK3-P), which should not be interchanged with any other transformer or supply. - Page 5 GSI service technician. Please read the entire manual prior to using the GSI 18 to become familiar with the test functions and proper accessory connections.
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Page 6: Customer Responsibility
GSI. The responsibility of GSI for a malfunction product is limited by the warranty set forth in this manual. Should repair or replacement of this product become necessary after the warranty period, the customer should seek advice from GSI Technical Support prior to such repair or replacement. -
Page 7: Warranty
GSI product service facility. If field service is requested, there will be no charge for labor or material; however, there will be a charge for travel expense at the service center’s current rate. -
Page 8: Specifications
GSI 18 Specifications The GSI 18 meets the following standards: ANSI S3.6 (2004) Specification for Audiometers (Type 4) IEC 60645-1 (2002) Electroacoustics - Audiological Equipment - Pure Tone Audiometers (Type 4) It is Class 1, internally powered with Type B applied parts. - Page 9 GSI 18 Frequency Range Discrete Frequencies: 125, 250, 500, 750, 1000, 1500, 2000, 3000, 4000, 6000, 8000 Hz Accuracy: ±2% Total Harmonic Distortion: <2.5% measured acoustically at the maximum Hz for frequencies below 5000 Hz and measured electrically above 5000 Hz.
- Page 10 -4° F to 105° F (-20° C to 40° C) Battery Storage: 15% to 95% Humidity: Mechanical Dimensions: 12.59” W x 8.76” D x 3.18” H (32 cm W x 22.3 cm D x 8.1 cm H) Weight: 2.55 lbs (1.16 Kg) with 5 AA batteries 1718-0100 Rev. E...
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Page 11: Electromagnetic Compatibility
GSI 18 Electromagnetic Compatibility 1718-0100 Rev. E... -
Page 12: Table Of Contents
Preliminary check................2-1 Operation Pretest noise recovery period............2-2 Test environment ................2-3 Providing patient instructions............2-4 Placing the earphones..............2-4 Response handswitch………..….……………...….…………..2-5 GSI Audiogram form………………..…………….….……...…2-5 Routine test administration............2-6 Transducer selection……………….…………..….…..…….2-6 HL knob………..…………………..……………..…...……..2-6 Range Extension pushbutton………..………….…..……..2-7 Tone Type selector…………………..……………..……..2-7 Typical testing session ..............2-8 Pretest review………………………..….……...….……..……2-8 Familiarization……………………..………...……..…..……...2-8... - Page 13 GSI 18 Preventive maintenance...............3-1 Chapter 3 Cleaning the GSI 18 …………………….….…..….…...…..3-1 Routine Cleaning and disinfecting agents …..….…..…..…..…..…..3-2 Maintenance Cleaning patient contact reusable devices….…...…..…...3-2 Routine calibration check ............3-3 Earphone cords ................3-4 Hum and random noise............... 3-4 Distortion and frequency shift ........... 3-4 Special messages ...............
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Page 14: Introduction
The GSI 18 is a precisely designed and calibrated instrument. With proper care, it will deliver accurate sound-pressure levels to subjects’ ears for hearing screening programs. NOTE: The GSI 18 should be calibrated yearly (or sooner if a problem develops) by a GSI certified technician. See Chapter 3. -
Page 15: Recycling / Disposal
GSI 18 Recycling / disposal CAUTION Many local laws and regulations require special procedures to recycle or dispose of electric equipment-related waste including batteries, printed circuit boards, electronic components, wiring and other elements of electronic devices. Follow all of your respective local laws and regulations for the proper disposal of batteries and any other parts of this system.D-9... -
Page 16: Installation
R4 -Left earphone output jacks (standard phone jack). Insert either DD45 Headphones or Insert Earphone plugs. R5 -Power Input jack (2.1 mm pin). R6 - Power switch. Table of symbols on the GSI 18 Symbol Description Attention, consult accompanying documents. - Page 17 GSI 18 Symbol Description Type B equipment. Reference Symbol. Stand-by. Right Ear. Left Ear. Patient Response Button. AC Power. Manufacturer. European Representative. Keep Dry. Lot Number. Serial Number. Transport and storage temperature range. This Side Up. 1718-0100 Rev. E...
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Page 18: Bottom Panel
Do not turn on/off system power while a patient is wearing the headsets or insert earphones. Use only the GSI provided power supply. The GSI 18 provided power supply should only be connected to a power source meeting the following range: 100- 240VAC, 50-60Hz. -
Page 19: Controls And Indicators
GSI 18 Controls and indicators +10dB dB HL Ref / ANSI S3.6 / ISO 389 Figure 3: Front panel controls and indicators. F1 -Range extension pushbutton allows you to increase the stimulus intensity 10 dB above the standard maximum HL at any frequency. When in use, a “+” appears on the LCD. - Page 20 F12 -Hearing Level knob for setting the stimulus intensity level. Level is indicated on the center top of the display. NOTE: The above symbol is located on the rear panel of the GSI 18 and denotes a Type B applied part.
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Page 21: Lcd Display
GSI 18 LCD display 13 12 Figure 4 - LCD Display Legend Icons/LEDs Description Indicates power is on. Indicates the current software version. When displayed, the stimulus is being presented. When displayed, an additional 10dB is available at the test frequency. - Page 22 Introduction Legend Icons/LEDs Description The stimulus is a pulsed tone. Stimulus presentation level. Not enough power from the batteries to operate the system. 1718-0100 Rev. E...
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Page 23: Ac Power
GSI 18 AC power An AC power supply can be purchased to use with the GSI 18. WARNING Use only the GSI provided power supply. The GSI 18 provided power supply should only be connected to a power source meeting the following range: 100-240VAC 50-60Hz. -
Page 24: Battery Operation
Introduction Battery operation GSI 18 requires 5 x 1.5V AA alkaline batteries. It can also use 5 x 1.2V AA Ni MH or NiCad batteries if rechargeable batteries are desired. The GSI 18 does not have a built-in charger, rechargeable batteries should be purchased with the recommended charger for those batteries. -
Page 25: Replacing The Batteries
The GSI 18 requires 5 x 1.5V AA alkaline batteries. It can also use 5 x 1.2V AA NiMH or NiCad batteries if rechargeable batteries are desired. -
Page 26: Removing Batteries
Introduction Removing batteries The battery compartment on the GSI 18 is located on the bottom of the base unit. To open the battery compartment, Gently squeeze the tab toward the door and away from the concave half circle and lift the door upward. -
Page 27: Placing New Batteries
Replace the battery compartment cover by inserting the square pegs into the slots and gently pushing down until the tab snaps into place and the compartment door is flush with the bottom of the GSI 18. 1-14 1718-0100 Rev. E... -
Page 28: Preliminary Check
Chapter 2 Operation Preliminary check Throughout this chapter are references to front panel (F) and rear panel (R) connectors, controls and indicators. Please refer to Figure 1 - Rear Panel connectors, Figure 3 - Front panel controls and indicators and Figure 4 - LCD Display in Chapter 1 o f this manual for specific descriptions and locations. -
Page 29: Pretest Noise Recovery Period
GSI 18 Pretest noise recovery period NOTE: The GSI 18 is a versatile audiometer designed for use in physician offices, schools, industrial settings, the military, etc. The generic term “subject” used in this manual is used to identify the person whose hearing is being evaluated. -
Page 30: Test Environment
Audiocups are available from GSI as an optional accessory for use with the DD45 Earphones. Insert earphones are another option in noisy test environments. They provide greater than 30 dB reduction of external noises. -
Page 31: Providing Patient Instructions
GSI 18 Providing patient instructions Put the subject as much at ease as possible before the test begins. In addition, help the subject understand how the test is to be conducted and what the subject will hear. Uniform and unvarying instructions should be given to each subject in order to achieve consistent and reliable test results. -
Page 32: Response Handswitch
If the optional response handswitch is used, ensure that the plugs and jacks are properly connected. GSI Audiogram Form The GSI 18 Audiogram form (see Figure 1) consists of three distinct parts: Space for entering personal information about the subject to be tested. -
Page 33: Routine Test Administration
Operation Routine test administration Transducer selection The GSI 18 provides options for either headphone or insert earphone transducers. Selecting the will apply the calibration values for the headphones. Selecting the will apply the calibration values for the insert earphones. To make the selection... -
Page 34: Range Extension Pushbutton
GSI 18 Range Extension pushbutton This control allows the operator to present tones of up to 10 dB above the standard maximum HL at any frequency. It will only function when the intensity is set within 10 dB below the maximum standard intensity at any frequency. This feature requires an extra step to access the highest available intensities. -
Page 35: Typical Testing Session
Operation Typical testing session Pretest review Turn the instrument on. Check that the earphones are operating properly. Seat the subject comfortably in the test area. Explain the test procedure. Place the earphones on the subject. Select the desired tone type. Familiarization Select the transducers. -
Page 36: Determining The Threshold (Pure Tone)
GSI 18 Determining the threshold (Pure Tone) Present the first tone at 50 dB in the subjects better ear, or if no preference, the right ear. Decrease the intensity in 10dB steps until the subject no longer responds. Increase the intensity in 5dB steps until the patient responds. -
Page 37: Preventive Maintenance
Avoid dropping the earphones or snapping them together as this could affect the calibration accuracy. Cleaning the GSI 18 Preventive maintenance includes periodically cleaning and inspecting the exterior of the instrument. It is recommended that you develop a s chedule for these purposes. -
Page 38: Cleaning And Disinfecting Agents
GSI 18 WARNING It is recommended that all repairs be performed by a qualified GSI service representative. Any malfunctions resulting from improper maintenance or repair by anyone other than an authorized GSI representative will void all warranties. Cleaning and Disinfecting Agents... -
Page 39: Routine Calibration Check
File these audiogram cards where they will be readily available for comparison with future results. If the GSI 18 is to be used to monitor employee thresholds as part of an industrial Hearing Conservation Program, this “biological listening check” must be done at the beginning of each day the audiometer is to be used (per CFR 1910.95 Occupational... -
Page 40: Earphone Cords
Distortion and frequency shift This check can be best made by listening to the output of the GSI 18 through the earphones while presenting all 11 frequencies at a loud, but not uncomfortable, level (70 to 80 dB HL for normal ears). -
Page 41: Special Messages
Routine Maintenance Special messages The GSI 18 performs a self-check each time the instrument is turned on (the self-check does not occur when instrument operation resumes from the “sleep mode”). Certain messages will be displayed on the front panel LCD if any error in the instrument operation is detected. - Page 42 Appendix - A GSI Country Kits Included in a GSI Country Kit are the following: Power Cord specific to a region of the world or batteries. • Manual in the language specific for the country. • Country Kits Description 1718-9400 Ctry Kit, N.
- Page 43 GSI 18 GSI Country Kits Description 1718-9450 Ctry Kit, Battery, English 1718-9451 Ctry Kit, Battery, Spanish 1718-9452 Ctry Kit, Battery, Portuguese 1718-9453 Ctry Kit, Battery, German 1718-9454 Ctry Kit, Battery, French 1718-9455 Ctry Kit, Battery, Italian 1718-9456 Ctry Kit, Battery, Chinese...
- Page 44 Appendix - B Reference Threshold Values Frequency 750 1000 1500 2000 3000 4000 6000 8000 (Hz) 47.5 27 20.5 12.0 (dB) Table 1: DD45 RETSPL Values for IEC 318-3 (NBS 9A) Coupler Frequency 750 1000 1500 2000 3000 4000 6000 8000 (Hz) 14.0 (dB)
- Page 45 Bibliography ANSI S3.6 (2004) Specification for Audiometers (Type 4) Criteria for Permissible Ambient Noise During Audiometric Testing (ANSI S3.1 - 1977) Methods for Manual Pure-Tone Threshold Audiometry (ANSI S3.21 - 1978) Michael, P.L., and Bienvenue, G.R., “Noise Attenuation Characteristics of Supra- Aural Audiometric Headsets Using the Models MX41/AR and 51 Earphone Cushions,”...
- Page 46 Cal 3-5 Calibration check 3-4 Cautions vi Cleaning patient contact reusable devices 3-2 Cleaning and disinfecting agents 3-2 Cleaning the GSI 18 3-1 Connecting the AC power 1-10 Controls and indicators 1-6 Country Kit A-1 Customer responsibility v Determining the threshold (Pure Tone) 2-9...
- Page 47 GSI 18 LCD display 1-8 Left earphone output plugs 1-3 Liquid Crystal Display (LCD) 1-6 Low battery indicator 1-11 Maintenance 3-1 New batteries 1-14 Operation 2-1 Patient Hand Switch input jack 1-3, 1-5 Placing new batteries 1-14 Placing the earphones 2-4...
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