AmpliVox ER75 - Routine Maintenance; Verification and Repair of the Instrument; Technical Specification; Performance

ROUTINE MAINTENANCE
5
D-0115622-C (OM011) – ER75 Operating Manual
4. ROUTINE MAINTENANCE
The ER75 is a precision instrument. Handle it carefully in order to ensure its continued accuracy and service.
When cleaning the instrument use a soft cloth and mild detergent to clean the instrument surfaces and the
earphone couplers. Do not allow any moisture to enter the microphones in the centre of the circular earphone
couplers.
5. VERIFICATION AND REPAIR OF THE INSTRUMENT
Amplivox recommend that the performance of this instrument should be verified on an annual basis. Please
contact Amplivox or the designated distributor for details of verification & calibration services.
The instrument should be returned to the manufacturer for service & repair. There are no user-serviceable
parts within it.
When packing the instrument for shipping, please use the original shipping carton and packing materials.
6. TECHNICAL SPECIFICATION
6.1. PERFORMANCE
Audiometry
Audiometric frequencies
250Hz, 500Hz, 750Hz, 1kHz, 1.5kHz
detected: 2kHz, 3kHz, 4kHz, 6kHz & 8kHz
Frequency detection range
±5% of nominal value
Level to trigger a response
75 dBHL
Response signal duration
1 second (minimum)
Physical
Power (battery)
2 x 1.5V AA cell batteries
Power consumption
120mW operating, 40μW standby
Construction
Plastic
Dimensions
150mm (w) x 110mm (d) x 95mm (h)
Weight (without batteries)
360g
Environmental
Operating temperature range
+15
o
C to +35
o
C
Storage & Transportation temperature range
-20
o
C to +70
o
C
Storage & Transportation humidity range
10% to 90% (non-condensing)
Storage & Transportation atmospheric pressure
range
500 hPa to 1060 hPa
Standards conformance
Degree of protection against ingress of water
Not protected
Mode of operation
Continuous operation
Equipment mobility
Portable
The ER75 is CE marked to EMC directive and
meets the requirements of the following
standards
 EN 61000-6-1:2007
 EN 61000-6-3:2007