User's Guide

Cochlear Limited 2011
62 323649 Iss 3 CP900 Series Sound Processors | User guides
Other information
CP900 Series Sound Processors | User guides 63
Cochlear Limited 2011
Operating characteristics
Processing unit
Characteristic Value/range
Sound input frequency range 100 Hz to 8 kHz
Operating voltage 2.00 V to 4.25 V
Power consumption 20 mW to 100 mW
Push-button functions Turn processor on and off, turn
telecoil/audio accessory on and off,
change program, lock/unlock buttons,
change sensitivity or volume level.
Battery module
Type Capacity/voltage range
Standard battery module Two PR44 (Zinc/Air) button cell
batteries. 1.45 V (nominal) each.
Cochlear recommends Power One
p675 Implant Plus zinc/air batteries.
Compact rechargeable battery module 120 mAh / 3.0 V to 4.2 V
Standard rechargeable battery module 205 mAH / 3.0 V to 4.2 V
Coil
Characteristic Value/range
Operating voltage 2.0 V to 2.6 V
Operating frequency 5 MHz
Environmental conditions
Processing unit, coil, coil cable and accessories
Condition Minimum Maximum
Storage temperature -40 ºC +50 ºC
Storage relative humidity 0% RH 90% RH
Operating pressure 700 hPa 1030 hPA
Operating temperature +5 ºC +50 ºC
Operating relative humidity 0% RH 90% RH
The processing unit comprises:
• Two omni-directional microphones for receiving sound.
• An internal telecoil for receiving magnetic fi elds radiated by phones, neckloops
and roomloops.
• Custom analogue and digital integrated circuits with digital signal processing
(DSP) and bi-directional wireless communication capabilities.
• A tri-colour visual indication of processor function or problem.
• Two push-buttons to allow user control of key features.
• CP910 only – Custom 4-pin accessory connector for connection of audio
accessories.
• Custom 4-pin coil connector for connection of the coil cable.
• A range of earhooks.
The batteries provide power to the processor.
The coil acts as a transformer coupling that transfers energy and data to the
implant.
Materials
• Processing unit: copolyester
• Battery modules (all types) are made of copolyester
• Coil is made of polypropylene (PP), thermoplastic elastomer (TPE)
• Magnet casing is made of acrylonitrile butadiene styrene (ABS)
• Coil cable sheath is made of polyvinyl chloride (PVC)
• Coil cable plugs are made of PP & TPE
• LiteWear cable is of polyester, TPE & PVC (same construction as the coil cable)
sheath is PVC; plugs/strain relief are PP and TPE
• LiteWear connection boots are made of copolyester
• LiteWear retention case is made of polyamide
Standard battery module
Check the battery manufacturer’s recommended operating conditions for
disposable batteries used in your processor.