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Comet® Portable EEG - Recording & Review
SYSTEM SPECIFICATIONS
Amplifier   Grass Technologies AS40 with 40 channels of data (expandable up to 50*): 32 referential EEG inputs (AC), 1 reference input, 1 patient ground, 8 bipolar AC channels
  * Maximum data channel count is determined by the type of AC and DC input modules in use.
AC Input
Signal Range 		  Referential and Bipolar AC channels: 4 mV peak to peak full-scale
  Differential DC voltage tolerance: 500 mV max
DC Input
Signal Range		   ±2.5 volts
Input
Characteristics 		  10 Megohm impedance, all inputs including reference
  All referential and bipolar AC inputs electrically isolated from earth ground
Frequency
Response 		  0.5 Hz to 100 Hz, -3 dB
0.1 to 100 Hz recoverable with TWin
Amplification   AC channels: 1200 ±2%
Vertical Resolution   16 bits (0.06 µV/bit)
Sampling Rate   800 samples/second/channel, simultaneous sample and hold. Data stored at 200 or 400 samples/second, user definable via TWin software
CMR  

>100 dB, all AC channels, at 50/60 Hz

Noise   <2 µV peak to peak referred to input
Impedance
Test Mode 		  Referential inputs only: 30 Hz square wave; range, 1 kohm to 100 kohms, 10%
Calibration Signal   Referential inputs only: 500 µV peak to peak ±2%; 5 Hz square wave
Patient Bias
Current		   Maximum: <4 nA
Typically: 300 pA
Event Input   1 pushbutton patient signaling input
Photic   1 photic (flash unit) control line
Connectivity to
Host PC 		  Standard Ethernet, TCP/IP protocol
Physical Size   AS40 Amplifier System: approximately
7"W x 6"H x 2"D (17.8 x 15.3 x 5.1 cm)
Weight: 2.3 lbs (1.1 kg)
  Personality Module alone: approximately
5"W x 4"H x 1.5"D (12.7 x 10.2 x 3.8 cm)
Weight: 0.4 lbs (0.2 kg)
Software   Powerful and user-friendly TWin record, review and analysis EEG software included
Operating System   Windows® XP
Power   Medical-grade Isolated Power Supply
Warranty   Lifetime Limited Warranty on Grass Technologies manufactured parts (see our full warranty for details)
Regulatory   AS40 Amplifier System: certified to UL2601-1, EN60601-1, EN60601-2-26, EN60601-1-2, EN60601-1-1,
CAN/CSA22.2.No.601.1; CE marked to EC MDD (93/42/EEC),
Referential and Bipolar AC (patient) inputs isolated, Type BF

ORDERING INFORMATION
Model CMP-E   Comet portable EEG recorder includes:
Latest high-performance lap-top computer, DVD+/-RW Archiver (internal), 10/100 BaseT NIC and Modem. TWin EEG Record and Review, Archive Managing software, MS Office software. 40-channel AS40 Amplifier System with tethered Universal Personality Module, Personality Module Adaptor, and Power Supply.
Model CM-E   Comet EEG recorder base only includes:
TWin EEG Record and Review software, 40-channel AS40 Amplifier System with tethered Universal Personality Module, Personality Module Adaptor, and Power Supply (provide your own PC or laptop).**
** Grass Technologies personnel must approve all personal computers or laptops used with the Comet base unit. Please contact Grass Technologies with any questions.
Options:
Model CME-TI    In-service/Training: on-site (USA only), 1 day (2 days minimum recommended)
Model
ACS-21825		   Wireless Keyboard and Optical Mouse
Rack Carts:
Model  IT9   Mobile Rack Cart with drawer for full size keyboard
Model
ARM-AS40-QR		   Adjustable Arm with quick release for mounting the AS40 on a Mobile Cart
Photic Stimulator & Accessories:
Model PS60/LED   Photic Stimulator
Model LH3-40   Floor Stand Flash Lamp Holder

Model
ARM-LH3-40

  

Adjustable Arm for holding Flash Lamp
Accessories:
Model UPM-1   Integrated Universal Personality Module
Model UPM-2 or UPM-2-10  

Tethered Universal Personality Module
Model PMA   Personality Module Adaptor, required for tethered personality modules only
Model
CAB-21648-10		   Patient pushbutton, 10' (3 m) cable length, other lengths available
Model
CAB-21617		   Event button to AS40 adaptor, used to connect an event button directly to the AS40 when an optional DCM8 DC Input Module is not available 1' (0.3 m) cable length
Model
KBD-21203-20		   20-button Keypad for notation entry and system operation
Model
KBD-21203-58		   58-button Keypad for notation entry and system operation
Model
ACS-21651		   Dedicated Ethernet Card for AS40 connection for use with a PC
Model
ACS-20944-01		   Dedicated Ethernet/Modem Card for AS40 connection for laptop use (included with portable EEG)
Model
AS40WMB		   AS40 base unit wall mount bracket
Model
F-EZM4D		   Grass Electrode Impedance Meter: International/Numeric symbols for Comet EEG UPM-2 Universal Personality Module
Model
EIM107-68		   Digital Impedance Meter, for use with AS40-based Amplifier Systems, includes EZ-SET Programming CD
Model EEG-E-1   EEG Electrode Kit
Model HUB-8   Network Hub (8-port 10/100/1000baseT switch)
Model HUB-16   Network Hub (16-port 10/100/1000baseT switch)
Model
ACS-21824		   Wireless-G Notebook Adaptor
Model
ACS-21823		   Wireless-G PCI Adaptor
Model
ACS-21822		   Wireless-G Broadband Router, 4 ports
Model
ACS-21841		   Wireless-G Ethernet Bridge, 1 port
Model
ACS-20749		   Carry case for Comet portable
Power Supplies:
Model IPS115   Isolated Power System (115 V, 50/60 Hz)
Model IPS230   Isolated Power System (230 V, 50/60 Hz)
Model UPS-1   Uninterruptible Power Source, 800 VA (115 V, 50/60 Hz)
Model
UPS-1-220		   Uninterruptible Power Source, 800 VA
(230 V, 50/60 Hz)
Model UPS-2   Uninterruptible Power Source, 525 VA (115 V, 50/60 Hz)
Model
MCB-20493		   AC Cordset, 6' (1.8 m) cable, from IPS115/230 to peripheral
Digital Video Options:
Model
PANO-LAP		   Panorama® Digital video/audio recording (complete with exception of camera, see Video Equipment) for use with lap-top computers
Model AUPAN-1   Panorama® Digital video/audio recording (complete with exception of camera, see Video Equipment) for use with PCs
PSG Software/Hardware Add-on:
Model PSG-UT3   TWin PSG software, DCM8 DC Input Module for up to 8 DC channels, SPM-2 Tethered Sleep Personality Module, PMA Personality Module Adaptor, required for tethered personality modules, DCM8 wall-mount bracket and cabling
Model SPM-1   Integrated Sleep Personality Module
Storage Devices:
Model
ACS-22001		   Removable Hard Drive Kit, USB, 500 GBytes
 

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