otometrics ICS NCA-200 User Manual

Air caloric stimulator

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AIR CALORIC STIMULATOR

User Manual

Doc no. 920001301-EN/06

Part no. 920001301-EN

Table of Contents

Summary of Contents for otometrics ICS NCA-200

Page 1 AIR CALORIC STIMULATOR User Manual Doc no. 920001301-EN/06 Part no. 920001301-EN...
Page 2 Printed in Denmark by GN Otometrics A/S, Denmark All information, illustrations, and specifications in this manual are based on the latest product information available at the time of publication. GN Otometrics A/S reserves the right to make changes at any time with- out notice.
Page 3 FORWARD Otometrics specializes in the manufacture of instruments for electro-oculography, electronystagmography and videonystagmography. Our products are of high quality and can be expected to provide excellent diagnostic information for many years. We back these instruments with a warranty and service commitment. Please contact...
Page 4: Table Of Contents
TABLE OF CONTENTS Section Page Introduction . … ................1 Installation ................. 2 III. Operation ................... 4 Front Panel Controls ............. 4 Rear Panel Connectors ............9 The Delivery Head Controls ..........
Page 5: Introduction
I. INTRODUCTION The NCA-200 Air Caloric Stimulator is a convenient and accurate instrument to be used for evoking eye movement responses (nystagmus) during VNG/ENG examinations. The system provides thermal stimulation through the use of a carefully controlled flow of air. The air temperature is adjustable from 12°C to 50°C.
Page 6: Installation
II. INSTALLATION After unpacking the instrument, remove any packing debris from around the control console and the delivery head. Make certain that the delivery cable has not been twisted or kinked. The system is designed to be used at any convenient level such as a table, cart or bench surface.
Page 7 VNG/ENG System Figure1: Typical room layout for performing the VNG/ENG test...
Page 8: Operation
III. OPERATION Front Panel Controls This section describes all operational controls located on the front panel of the NCA-200 (Figure 2). Power Switch This is a push on/push off switch that applies line power to the unit. Power-on is indicated by the illumination of the digital display. Digital Display When setting temperature with the Warm Temp/Cool Temp set controls, the display indicates temperature with a "C"...
Page 9 FLOW ON/OFF SWITCH POWER SWITCH medical air caloric stimulator NCA-200 COOL TEMP WARM TEMP FLOW TIME FLOW METER DIGITAL DISPLAY BATH SELECT LED'S UP/DOWN (arrow) CONTROLS COOL TEMP SET CONTROL WARM (orange) TEMP SELECT CONTROL COOL (blue) TEMP SELECT CONTROL WARM TEMP SET CONTROL FLOW TIME SET CONTROL Figure 2: Front view of the NCA-200 showing panel controls.
Page 10 Selections made with these buttons can be used to override computer selections. Warm Temp/Cool Temp Set Controls These buttons provide a display of the “set” temperature and allow it to be changed. Pressing the Warm Temp button causes the set temperature for the warm stimulus to be displayed.
Page 11 Up or down (arrow) controls Immediately after selecting the Warm Temp, Cool Temp, or Flow Time controls, the up or down (arrow) controls can be used to adjust the set temperature or the flow time. A single push of either the up or down button will increase or decrease the temperature by 0.1°C or the flow time by one second (the available time range is from 1 to 99 seconds).
Page 12 Flow Meter The flow rate can be adjusted by using the control at the base of the flow meter. The flow meter is usually set to deliver 8 LPM of air. Flow on/off switch This switch enables the user to start or stop the airflow to the delivery head.
Page 13: Rear Panel Connectors
Rear Panel Connectors The rear panel is the location of connectors to external control or recording devices (Figure 3). REMOTE CONTROL COMPUTER CONNECTION POWER INPUT & FUSES POWER LINE VOLTAGE SELECTOR Figure 3: Rear panel view of the NCA-200 with connectors.
Page 14 Computer Connection The stimulator cable connector goes to the computer connection on the rear panel of the stimulator. Through this connection to the computer, the computer is able to select stimulus temperature through the software. NOTE: This selection can be made on the unit's front panel (the orange and blue temperature select controls).
Page 15: The Delivery Head Controls
115 VAC/230 VAC Operation If the NCA-200 is to be operated on 115VAC line voltage, the "input voltage" switch must be set to "115" and the line fuses in the power input module must be 5Amp, Slo-Blo, type 3AG fuses. If the NCA-200 is to be operated on 230 VAC line voltage, the "input voltage"...
Page 16: Charging The Memory Backup Capacitor
Charging the Memory Backup Capacitor The NCA-200 incorporates a large capacitor to provide power to maintain the temperature and time setpoints while the unit is turned off. The operation of this capacitor is similar to that of a rechargeable battery. Before the NCA-200 is placed in service Although the capacitor is fully charged at the factory, considerable time may elapse before the unit is actually placed in service.
Page 17 After prolonged interruption of use If the NCA-200 is out of service for a week or more, follow the procedure for initial charging of the capacitor as described in point 1 above. Inner Speculum Full View Note: Warning Symbol Otoscope Lens indicates that the inner speculum should never be...
Page 18: Operating Procedures
If the computer is turned on but the software is not running, flow time may be activated by holding down the flow time activation switch or the footswitch for 5 seconds. IV. OPERATING PROCEDURES Preparation for Testing Turn the unit on by pressing the green power switch at the top left of the front panel.
Page 19: Testing Procedure
Testing Procedure Using a regular otoscope or the delivery head with air flow turned off, examine the ear canal for the presence of cerumen and also to determine how best to direct the NCA-200 airstream. The ear canal should be essentially free of cerumen.
Page 20: Safety Features
SAFETY FEATURES Patient and operator safety are insured by the incorporation of an isolation transformer. Also a heavy duty, three-wire AC line cord and a "Hospital Grade" plug have been provided. It is imperative that the plug be connected to a "Hospital Grade" receptacle in order to insure a reliable ground.
Page 21 Warning Notes 1. For the sake of safety, and in order not to void the warranty, the cabinet should only be opened and serviced by authorized service personnel. In case of defects, please make a detailed description of the defect(s) and contact your distributor. Do not use a defective instrument.
Page 22: Cleaning And Maintenance
This is required once every 6 months, and should be performed by your local Otometrics distributor or the factory. Keep the instrument clean and as free of dust as possible. Remove dust using a soft cloth. To clean the outside case, use a soft, slightly damp cloth with a small amount of mild detergent.
Page 23 Turn on the main power switch. Water should circulate from the pump, to the delivery head, then the radiator, and finally return to the pump. Once water is recirculating back into the reservoir, fill the reservoir to within 1/4 inch of its top edge. Replace the reservoir top cover. Next, tilt the unit to the left by raising the right edge of the unit about 4 inches.
Page 24: Warranty
VII. WARRANTY Otometrics warrants this instrument to be free of defects in material and workmanship for a period of one year from the date of shipment from the factory. Defects or deficiencies noted and brought to Otometrics’ attention during the warranty period will be corrected, or, at Otometrics’...
Page 25: Specifications
VIII. SPECIFICATIONS Temperature range: 12° to 50°C Cool stimulus: 12° to 37°C (Recommended setting: 24°C) Warm stimulus: 37° to 50°C (Recommended setting: 50°C) Temperature readout: Digital Time to temperature: < 60 seconds Temperature accuracy: +/- 0.3°C Time range: 1 to 99 seconds (Recommended setting: 60 seconds) Flow rate range: 4 - 10 LPM (Recommended setting: 8 LPM) Air supply: Internally mounted compressor Remote control capability: Standard for computer-based systems.
Page 26 Storing and Handling Temperature: 0°C to +40°C (32°F to +104°F) Relative Humidity: <90%, non-condensing Air Pressure: 500 hPa to 1060 hPa ACCESSORIES Specula (Qty 25) 8-62-44100 Lens (Qty 1) 8-35-33300...