GSI 61 AUDIOMETER SERVICE MANUAL PDF

GSI 61 AUDIOMETER SERVICE MANUAL PDF

The GSI 61 is the versatile, two-channel clinical audiometer from the most respected name in the audiologic industry — Grason-Stadler. With its state-of-the -art. GSI 61™. CLINICAL AUDIOMETER. Product. Specifications. General Specifications. • ”(W) x ”(D) x ”(H) (LCD raised). • Height with LCD. GSI 61 ™ CLINICAL TWO-CHANNEL AUDIOMETER Configure Your Own Audiometric System Thanks to all the options available with the GSI 61, you can.

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Save This pushbutton, when pressed, saves the current dB HL level representing the threshold level, and effective masking level if selected, transducers and routing. Score each correct response by pressing the Correct button and each wrong response by pressing the Incorrect button.

If the bone vibrator cannot be calibrated to specifications, it should be replaced. B i Warnings, Cautions and Errors Serviec

68 Technical Manual | Frank Humberto Hernández Maita –

Not tested frequency If a frequency has not been tested, the corresponding position in the string is empty, filled with space characters. Assist the patient with earphone or insert phone placement and with positioning the bone vibrator on the forehead.

The printer is connected to the main unit with a 9 pole D-SUB connector. These servie appear only when a message is displayed. Zero degree Azimuth reference threshold values are based on ISO The operator makes the channel, routing, transducer and presentation mode selections which are appropriate to the test requirements.

Damage to amplifiers inside the GSI 61 will occur. Indicates that data has been processed either by the printer or by a remote computer. The GSI 68 can carry out speech test either live speech via an optional microphone or recorded speech from a CD or tape player.

Channel 1 and Channel 2 may be interlocked for simultaneous presentations or operated independently. When the timer is first selected, it initializes to 0: X X X audiograms in non-volatile memory for later transfer to a printer or computer Ver: This IC is a 6th order switched capacitor Butterworth low-pass filter with clock tuneable cut-off frequency.

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Practice word pairs should be presented to the patient before scoring begins. Listen for an intermittent signal, abrupt changes in the signal level, or a scratchy sound riding over the signal that coincides with the flexing of the cord.

Printer An optional color or black-and-white printer may be attached to the GSI61 to allow printing of the audiometric test results. Two audiograms with the standard range of frequencies Hz to 12, Hzor the High Frequency ranges 8 kHz to 20 kHzand the instrument status are displayed.

The patient is asked to repeat both spondees: The format for correct date presentation might have been changed in the SetUp menu.

B Chapter 2 – Installation Interlock This pushbutton locks both tone bars together so that operating one channel will also operate the other, according to the status of the Interrupt buttons. When the Interrupt is in the off position, the corresponding channel is sudiometer by depressing the Tone bar bar and deactivated by releasing the Tone bar. The buildup of increased temperature can cause harm to the earphones.

The analogue part consists of all mannual that have to do with the sound generation and distribution. The hearing levels listed in this table are guaranteed maximum levels. Test all of the input and output transducers that will be used during testing to verify that the signals and communication functions are operating properly.

Changes in the product not approved in writing by Grason-Stadler shall void this warranty. Set the attenuator for the channel routed to the better ear at a level 10 dB above the threshold for that ear.

A standard microphone is positioned at the end of the adjustable boom. The Discrimination Score is the percentage of words repeated correctly: The GSI 66, GSI 67 and GSI 68 are specially calibrated audiometers and the periodic service and adjustments, which the instruments may require, should be done only by an authorised Grason — Stadler service technician.

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Grason-Stadler GSI 61 Manual Rev B

If no printer is connected make a note for future reference. The information in this publication is proprietary to Grason-Stadler. No Response symbols are placed on the audiogram at the maximum output limit for the transducer and frequency combination.

Channel 2 is not active during this test. Note that the selection of Ext A, or Ext B, on one channel and Tone on the opposite channel is a valid combination. Placement of the Bone Vibrator The bone vibrator may be placed on the promontory of the mastoid process or on the forehead, whichever has been selected for calibration. All current controls srrvice displays will be initialised to their currently selected positions selected in the Set Up Menu.

When a button is pressed the cursor automatically moves to the next position.

GSi 61 User Manual

During the time that an output record is being sent and transmitted, the Data Transfer indicator is displayed on the LCD panel. If a transducer with a narrower range is selected, only valid frequencies for that transducer are available. Pressing Clear servkce Stop resets the timer to 0: Display High Frequency Rev.

If distortion is heard in one earphone but not in the other, the chances are high that the earphone is at fault and should be replaced. The label and jacks are visible looking down onto the instrument, behind the LCD.