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15 

 

B. 

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.  If it is not, this must be removed prior to stimulating.  After 

selecting the proper temperature and the standard 60 second time for caloric 

stimulation, start the flow of air and then place the speculum of the otoscopic 

air delivery head directly into the ear and direct the flow of air onto the 

tympanic membrane.  

 

Momentarily depress the flow time activation trigger button on the delivery 

head.  If the NCA-200 is connected to the CHARTR 200 VNG/ENG or 

CHARTR VNG/ENG  system, subsequent depressions  of the flow time 

activation switch will center the tracing for VNG/ENG or start the video 

recording for VNG.  (If installed, the footswitch will also serve to start and 

center tracings or start the video recording.)  After the selected time interval 

has elapsed, a beep indicates when the otoscopic air delivery head should be 

removed.  After stimulation, remove the speculum from the ear, dispose of 

the speculum and carefully place the delivery head in a safe location.  Be sure 

to utilize alerting tasks as the eye movements are being recorded. 

Содержание ICS NCA-200

Страница 1: ...AIR CALORIC STIMULATOR User Manual Doc no 920001301 EN 06 Part no 920001301 EN...

Страница 2: ...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 an...

Страница 3: ...stagmography 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 servi...

Страница 4: ...B Rear Panel Connectors 9 C The Delivery Head Controls 11 D Charging the Memory Backup Capacitor 12 IV Operating Procedures 14 A Preparation for Testing 14 B Testing Procedure 15 V Safety Features 16...

Страница 5: ...aintained through the use of a thermistor located within 60 mm of the point of airflow delivery The innovative design of the otoscopic delivery head allows observation of the point of stimulation assu...

Страница 6: ...ination room layout Connections to the computer based CHARTR 200 VNG ENG can be made In order to understand how these connections are made please refer to section IIIB Rear Panel Connectors The capaci...

Страница 7: ...3 Figure1 Typical room layout for performing the VNG ENG test VNG ENG System...

Страница 8: ...sented when the flow time is being displayed The default settings on power up provide selection of the cool stimulus and display of the cool stimulus temperature 3 Warm orange or Cool blue Temperature...

Страница 9: ...TER DIGITAL DISPLAY UP DOWN arrow CONTROLS COOL TEMP SET CONTROL WARM TEMP SET CONTROL FLOW TIME SET CONTROL COOL blue TEMP SELECT CONTROL WARM orange TEMP SELECT CONTROL BATH SELECT LED S medical air...

Страница 10: ...conds after pressing the button or after making the last changes see point 6 below the display returns to the temperature of the selected stimulus 5 Flow Time Set Control This provides a display of th...

Страница 11: ...for more than 3 4 of a second the temperature or the flow time will change at the rate of 3 units a second in the selected direction Once set the operating parameters will be stored in memoryregister...

Страница 12: ...rol at the base of the flow meter The flow meter is usually set to deliver 8 LPM of air 8 Flow on off switch This switch enables the user to start or stop the airflow to the delivery head With the air...

Страница 13: ...ear panel is the location of connectors to external control or recording devices Figure 3 Figure 3 Rear panel view of the NCA 200 with connectors 115 REMOTE CONTROL COMPUTER CONNECTION POWER LINE VOLT...

Страница 14: ...l connector at the rear of the stimulator This would be used to activate the flow timer If a computer is connected and a caloric test has been selected in the software the first depression of the foot...

Страница 15: ...the input voltage switch must be set to 230 and the line fuses in the power input module must be 3 Amp Time Delay 5x20 mm fuses C The Delivery Head Controls The delivery head Figure 4 can be held in a...

Страница 16: ...ctually placed in service Therefore it is recommended that the following procedure be followed before the unit is placed in service Turn the NCA 200 on The air pump may be turned off for quieter opera...

Страница 17: ...acitor as described in point 1 above Figure 4 Front and Back views of the NCA 200A delivery head and controls Inner Speculum Note Warning Symbol indicates that the inner speculum should never be place...

Страница 18: ...to the blue temperature select control Press the orange temperature select button if the warm temperature is to be selected The digital display will flash until the set temperature is reached It takes...

Страница 19: ...onto the tympanic membrane Momentarily depress the flow time activation trigger button on the delivery head If the NCA 200 is connected to the CHARTR 200 VNG ENG or CHARTR VNG ENG system subsequent de...

Страница 20: ...this event it is important to insure that the ground wire of the line cord is reliably connected to an appropriate ground Overtemperature protection is assured through the use of a special secondary s...

Страница 21: ...lectromagnetic environment in which radiated disturbances are controlled The customer or user of the NCA 200 can help prevent electromagnetic interference by maintaining a minimum distance between por...

Страница 22: ...btained from Otometrics or your distributor Two 5 amp fuses 3 amp for 240v operation are located on the back panel NCA 200 Coolant Refill Procedure NOTE If the customer is not comfortable following th...

Страница 23: ...the left by raising the right edge of the unit about 4 inches Return the unit to a level position Repeat this process until there are no more air bubbles observed leaving the radiator If the pump sta...

Страница 24: ...he factory such shipments will be made prepaid Exempted from this warranty are the following A Instruments not installed in accordance with the instructions in the manual B Instruments serviced by per...

Страница 25: ...mote control capability Standard for computer based systems Timeout indication Beeper Input power 120 VAC 60 Hz or 240 VAC 50 Hz Current 5A 120 VAC 3A 240 VAC Safety Primary temperature read out Separ...

Страница 26: ...22 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...

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