Astro Med PSGAMP, PSGBASE User Manual

GRASS-TELEFACTOR

AUR A® PSG

WIRELESS /AMBULATORY RECORDER

WITH AURAPSG AMPLIFIER SYSTEM

USERS MANUAL

Release A

®

600 East Greenwich Avenue, West Warwick, RI 02893

Phone [phone] • Fax [phone] • Technical Support 877.472.7779 • E-mail [e-mail]

Web site: www.grass-telefactor.com

Manual Part Number M636K05

© COPYRIGHT 2005 ASTRO-MED, INC.

This manual is copyrighted with all rights reserved. No part of this manual
may be reproduced, transmitted, transcribed, stored in a retrieval system, or
translated into any language in any form by any means without written
permission of Grass-Telefactor, An Astro-Med, Inc. Product Group.

Information in this document is subject to change without notice. Astro-Med,
Inc. assumes no responsibility for any errors, omissions or inaccuracies
whatsoever. The software described in this document is furnished under a
software license agreement. The software may be used only in accordance
with the terms of this agreement. Except as permitted by the software license
agreement, no part of this software may be reproduced, transmitted,
transcribed, stored in a retrieval system, or translated into any language, in
any form or by any means, electronic, mechanical, magnetic, optical, chemical,
or manual, including photocopying, anywhere in the world without the
written permission of Astro-Med, Inc.

TRADEMARKS

AURA®, Aurora®, Beehive®, Beehive Millennium®, Brain Navigator®,
BrainTree
H2O
TWin

CompactFlash
Windows
Bluetooth
PureLight

Other brand and product names are trademarks or registered trademarks of
their representative holders.

Printed in the United States of America

®

, Comet®, EZM®, EC2®, FASS™, Gamma®, GrassLab®, Heritage®,

®

, Panorama®, PolyVIEW®, SAFELEAD®, SleepTrek®, Sonoma®, SzAC®,

®

and TWinLOOK® are trademarks of Astro-Med, Inc.

®

is a trademark of SanDisk Corporation.

®

is a trademark of Microsoft Corporation.

™

is a trademark of Bluetooth SIG, Inc.

®

is a trademark of Nonin Medical, Inc.

AMPLIFIER SYSTEM IDENTIFICATION DATA

Congratulations. Your Grass-Telefactor purchase is an investment in the finest of
state-of-the-art medical technology. The information provided below lists the model
number and serial number of your Amplifier system. If, for any reason, it should be
necessary for you to contact Astro–Med, Inc. regarding your purchase, please refer to
the following:

Amplifier Serial Number: ______________________
Base Station Serial Number:______________________

IMPORTANT

This manual is subject to periodic review, update, and revision. Customers are
cautioned to verify that the manual’s information applies to the software and
hardware present in the equipment.

This product performs as described in this manual, and in accompanying labels
and/or inserts, when assembled, operated, maintained, and repaired in accordance
with the instructions provided.

This product must be cleaned and checked periodically. Do not use a defective
product. Parts that are broken, missing, worn, or contaminated should be replaced
immediately. If repair or replacement becomes necessary, call or write to request
service advice from Grass-Telefactor.

This product must not be altered without the prior written approval of
Grass-Telefactor. The user of this product shall have the sole responsibility for any
malfunction that results from improper use, faulty maintenance, improper repair,
unauthorized service, or alteration by anyone other than Grass-Telefactor.

The safety, reliability, and performance of this device can only be assured under the
following conditions:

• If the device has been used according to the accompanying
operating instructions.

• If changes or repairs have been carried out by Grass-Telefactor.

• If it is used in buildings having ground equalization wiring that complies
with relevant UL, CSA, IEC or other local standards and regulations.

REGULATORY NOTICES

This device has been designed and certified to comply with the requirements
of the international standard EN60601-1 and EN60601-2-26, EN60601-1-2, and
EN60601-1-1 the United States standard UL 60601-1, and the Canadian
standard CAN/CSA22.2 No.601.1.

The device is classified:
CLASS I, Type BF
100-250 VAC, 50/60 Hz, 80 VA

The above classification is based on the condition that this device is installed
and configured according to the instructions supplied. In order for the
complete system to maintain compliance with the relevant standards, the host
computer must be approved to the IEC950 standard.

This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try to correct the interference by one or more
of the following measures:

•Reorient or relocate the receiving antenna.

•Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that
to which the receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

This device complies with part 15 of the FCC Rules. Operation is subject to the
following two conditions:

1. This device may not cause harmful interference, and

2. This device must accept any interference received, including
interference that may cause undesired operation.

EQUIPMENT CLASSIFICATIONS

Shock Prevention: Class 1

Degree of Protection Against Harmful Ingress of Water: Ordinary Equipment, IPX0

Degree of Safety in the Presence of Flammable Anesthetic Mixture with Air or with
Oxygen or Nitrous Oxide: Equipment not suitable for use in the presence of a

flammable anesthetic mixture with air, oxygen, or nitrous oxide.

Mode of Operation: Continuous

WARNINGS

ELECTRIC SHOCK HAZARD

Warning: Connect the Base Station Power Supply only to a three-wire,

grounded, hospital-grade receptacle. The three-connector plug
must be inserted into a properly wired three-wire receptacle. If a
three-wire receptacle is not available, a qualified electrician must
install one in accordance with the governing electrical code.

Warning: Do not use extension cords or adaptors of any kind. The power

cord and plug must be intact and undamaged.

Warning: The appliance coupler (AC Cordset) is the means for

disconnecting the Base Station from the power mains.

Warning: Measure the system’s leakage current after completion of

installation, after disconnect/reconnection of parts of the system,
and at regular periodic intervals. For instructions on how to
perform this test please contact Grass-Telefactor Technical
Support. Forward and reverse polarity: 500 microamperes
maximum.

EXPLOSION HAZARD

Warning: Do not use this system in the presence of flammable anesthetics

or other flammable substances.

Warning: Use only the specified battery (part number 26759200) in the

AURA PSG Amplifier. Use of unauthorized battery may cause
explosion/fire hazard.

PATIENT SAFETY

Warning: The patient should be disconnected from the AURA PSG system

when high frequency surgical equipment is used.

Warning: This system should not be used in place of electrocardiograph for

vital signs monitoring.

Warning: Use only by or on the order of medically trained personnel.
Warning: Battery Charger must not be located in a patient area.
Warning: Do not use in an MRI environment.
Warning: Read manual before using.
Warning: Protect from exposure to liquids. If the Amplifier Unit is exposed to

liquids during recording, discontinue use by disconnecting the
electrodes from the Amplifier Unit and turning the Amplifier Unit
power off. Resumption of recording is to be performed only by
qualified personnel.

Warning: AURA PSG contains no user serviceable parts.
Warning: AURA PSG is not intended to be sterilized.
Warning: Use only Nonin-manufactured PureLight

These sensors are manufactured to meet the accuracy specifications
for Nonin pulse oximeters. Using other manufacturers’ sensors can
result in improper pulse oximeter performance. A list of compatible
sensors is provided in C

HAPTER 5: ACCESSORIES AND REPLACEMENT PARTS.

Warning: Loss of pulse oximeter monitoring can result if any objects hinder

the pulse measurement. Ensure that no blood flow restrictors (e.g.,
blood pressure cuff) hinder pulse measurements.

Warning: As with all medical equipment, carefully route cables and

connections to reduce the possibility of entanglement or
strangulation.

Warning: This pulse oximetry system is designed to determine the percentage

of arterial oxygen saturation of functional hemoglobin. Significant
levels of dysfunctional hemoglobin, such as methemoglobin, might
affect the accuracy of the measurement.

Warning: Inspect the pulse oximeter sensor application site at least every

6 to 8 hours to ensure correct sensor alignment and skin integrity.
Patient sensitivity may vary due to medical status or skin condition.
Discontinue use of adhesive tape strips if the patient exhibits an
allergic reaction to the adhesive material.

Warning: The accuracy of the SpO2 measurement may be affected if the total

pulse oximeter cable length (including extension cables) is greater
than 3 meters.

®

pulse oximeter sensors.

INTENDED USE

The AURA PSG amplifier system is intended for recording routine
electroencephalography (EEG) and polysomnography (PSG).

The device is intended to be used only by physicians, technicians, or other
medical professionals that are trained in electroencephalography or
polysomnography.

CAUTION

Federal law restricts this device to sale by or on the order of a licensed
physician (or properly licensed practitioner).

Use only the Nonin probes as the optional pulse oximeter.

Use only accessories and electrodes identified for use with this device
(see instructions for the electrodes that are being used).

Disconnect power supply before servicing.

Disconnect the AURA PSG before using a defibrillator.

The use of pulse oximeter accessories, sensors, and cables other than those
specified by Grass Telefactor may result in increased emission and/or
decreased immunity of this device.

The AURA PSG wireless mode uses the 2.4 GHz ISM band. Performance may
be impacted by other devices using this frequency, including Wi-Fi terminals,
Bluetooth PDAs and some cordless phones.

1

Specifications & Symbols Glossary

Specifications

AURA PSG SYSTEM SPECIFICATIONS

Amplifier__________ Grass-Telefactor AURA PSG system

13 referential electrode inputs
2 reference electrode inputs
7 differential inputs
2 DC coupled inputs
1 connection for a Nonin pulse-oximeter

AMPLIFIER SPECIFICATIONS

REFERENTIAL ELECTRODE INPUTS

Input Signal Range _ 4 mV peak to peak full-scale
Input Impedance ___ 12 Megohm or higher, all inputs including reference
Differential Input
Impedance _____ 20 Megohm or higher
Amplitude Accuracy_ ±2.5 % (prior to software correction)
Frequency Response 0.5 Hz to 50 Hz (-3 dB points, within 10%)
Enhanced Low
Frequency
with TWin ______ 0.1 Hz (-3 dB, within 10%)
CMR (60 Hz) _______ >80 dB (signal referenced) or >100 dB (earth reference)
Noise ____________ <2 µV peak to peak
Input Bias Current__ <4 nA
Cross-Talk ________ 0.1% or less
Maximum Input ____ 4 mV

AURA

®

PSG Wireless/Ambulatory Recorder 1-1

DIFFERENTIAL INPUTS

Input Signal Range _ 4 mV peak to peak full-scale
Input Impedance ___ 12 Megohm or higher
Amplitude Accuracy_ ± 2.5 %
Frequency Response 0.5 Hz to 50 Hz (-3 dB points, within 10%)
Enhanced Low
Frequency
with TWin ______ 0.1 Hz (-3 dB, within 10%)
CMR (60 Hz) _______ >80 dB (signal referenced) or >100 dB (earth reference)
Noise ____________ <2 µV peak to peak
Input Bias Current__ <350 nA
Cross-Talk ________ 0.1% or less
Maximum Input ____ 4 mV

ISOLATED DC INPUTS

Input Signal Range _ ±2.0 V
Frequency Response 50 Hz (-3 dB points, within 10%)
Cross-Talk ________ 1% or less

Impedance
Test Mode ______ Referential inputs only: 1 kohms to 100 kohms, 10%
Calibration Signal __ Referential inputs only: 500 µV peak to peak ±2%
Sampling Rate _____ 200 samples/second/channel
Power ____________ Rechargeable 3.6 V lithium battery

Capacity: 10 hours in the wireless mode, 12 hours in the
tethered mode
Charging: The battery must only be charged with the
external Grass-Telefactor 42050100 Battery Charger that
operates from a DC voltage supplied by the external
RPS-21903 Power Supply (see the separate Battery
Charger operating instructions)

Physical Size ______ Amplifier Unit approximately:

3.5" W x 5.9" H x 1.0" D (8.9 cm x 14.9 cm x 2.5 cm)
Weight: 10 ozs. (280 g)

1-2 Chapter 1 Specifications & Symbols Glossary

BASE STATION SPECIFICATIONS

NON-ISOLATED DC INPUTS

Input Signal Range _ ±2.5 V
Frequency Response 50 Hz (-3 dB points, within 10%)
Cross-Talk ________ 1 % or less

DC Channels ______ 2 channels

±2.5 V

Connectivity
to Host PC______ Standard 10Base-T Ethernet, TCP/IP protocol
Power ____________ Medical-grade Isolated Power Supply
Physical Size ______ Base Station approximately:

7" W x 7.5" H x 2.7" D (17.8 cm x 19.1 cm x 6.9 cm)
Wei gh t: 2.3 lbs. (1.04 kg)

BUILT-IN OXIMETER: USE ONLY WITH NONIN PURELIGHT SENSORS

Oximeter Saturation
Range _________ 0 to 100%
Pulse Rate Range __ 18 to 300 pulses per minute
Measurement
Wavelengths ____ Red: 660 nm at 3mW nominal

Infrared: 910 nm at 3mW nominal

±

Accuracy _________ SpO2 (70-100%) (

No Motion: Adults, Pediatrics ±2 digits

Motion: Adults, Pediatrics ±2 digits

Low Perfusion: Adults, Pediatrics ±2 digits

Heart Rate:

No Motion (18-300 bpm):

Adults, Pediatrics, Neonates ±3 digits

Motion (40-240 bpm):

Adults, Pediatrics, Neonates ±5 digits

Low Perfusion (40-240 bpm):

Adults, Pediatrics, Neonates ±3 digits

* Standard Derivation is a statistical measure: up to 32% of the readings may fall outside these limits.

1SD*):

Neonates ±3 digits

Neonates ±3 digits

Neonates ±3 digits

AURA

®

PSG Wireless/Ambulatory Recorder 1-3

OTHER SPECIFICATIONS

Regulatory ________ AURA PSG System: certified to

UL 60601-1
CAN/CSA C22.2 No. 601.1
IEC 60601-1-1
IEC 60601-2-26
EN 60601-1-2
CE marked to EC MDD (93/42/EEC)

Warranty__________ Lifetime Limited Warranty on Grass-Telefactor

manufactured parts (see our full warranty for details)

Software __________ Fully supported by TWin

RPSAS40 MEDICAL-GRADE POWER SUPPLY

Input _____________ 100 to 260 VAC

Line Frequency: 47 to 63 Hz

Ambient Operating Temperature: 0 to 40°C

IEC320 Power Inlet, Removable 8-foot (2.4 m)
Hospital-grade Cordset

Output ___________ +12 VDC Regulated, 1.2 Amperes maximum

Short Circuit Protected

Line/Load Regulation: ±5% Overall

Output Cable: 6 foot (1.8 m)

Agency Approvals__ Conforms to UL2601-1 and certified to

CAN/CSA C22.2 No.601.1,
Certified to IEC60601-1 and TUV601.1 approved

Physical Size________ 3" W x 1.89" H x 4.75" L (7.6 cm x 4.8 cm x 12 cm)

Weight: 1 lb. (0.45 kg)

SYSTEM TRANSPORT OR STORAGE SPECIFICATIONS

Ambient Temperature
Range __________ -40° C to +70° C
Relative Humidity
Range __________ 10% to 100%, including condensation
Atmospheric
Pressure Range__ 500 hPa to 1060 hPa

(All specifications subject to change without notice.)

1-4 Chapter 1 Specifications & Symbols Glossary

GLOSSARY OF SYMBOLS

Direct Current
Courant Continu

On (only for a part of equipment)
Marche (seulement pour une partie de l’appareil)

Off (only for a part of equipment)
Arret (seulement pour une partie de l’appareil)

Attention, consult accompanying documents
Attention, consulter les documents d’accompagnement

Protective Earth
Terre de Protection

Isolated Inputs
Entrées Isolées

Non-ionizing electromagnetic radiation
Rayonnement électromagnétique non ionisant

AURA

®

PSG Wireless/Ambulatory Recorder 1-5

1-6 Chapter 1 Specifications & Symbols Glossary

2

Introduction

Product Description

The AURA PSG system is designed specifically for recording EEG and PSG.
The system features a compact, wearable 24-channel Amplifier Unit and a Base
Station that can be mounted in a variety of locations.

The AURA PSG system provides for patient safety isolation, signal
conditioning (physiological signal amplification and filtering), and digitization.
The host computer receives data according to a specific protocol.

®

Grass-Telefactor TWin
and process the data. The TWin software is powerful and easy to use,
providing data acquisition, recording, and review capabilities in one flexible
package.

software can be used on the host computer to receive

AURA

By combining over 70 years of neurophysiological amplifier experience with
the latest digital design techniques, the AURA PSG continues with the quality,
reliability, and simplicity that have made Grass-Telefactor famous in the field of
neurophysiology.

FEATURES

• Compact design that is rugged, lightweight and easy to use

• Local analog to digital conversion for interference-free recordings

• Easily connect to any PC with the on-board Ethernet connection

• Built-in impedance checking and calibrations

• Amplifier Unit is wearable for ambulatory applications

•Wireless mode allows ambulatory applications within 25 feet (without
obstructions) of the Base Station.

®

PSG Wireless/Ambulatory Recorder 2-1

AMPLIFIER UNIT

The unit is enclosed in a plastic housing approximately 3.5” W x 5.9” H x 1.0” D
(8.9 cm x 14.9 cm x 2.5 cm) in size. It is small and light enough to be worn
comfortably.

The Amplifier Unit provides 22 isolated, analog waveform inputs along with
two additional channels generated by a Nonin pulse oximeter. Electrode and
sensor connection is direct to the unit with no adaptor required.

RA

PSG

AU

DC1

RAT

Snore

Airflow

Following is a list of the analog inputs with connector type:

13 AC Referential SAFELEAD electrode connection
1 AC Differential Pair of SAFELEAD electrode connections
6 AC Differential 2-pin molded connectors

2 DC 2-pin molded connectors
There are also SAFELEAD electrode connections for two Ref inputs and one GND
(common). The Amplifier Unit can operate in either standard or wireless modes.

SpO2

Pulse

ECG

+

CH13

Chin3

Chin1

C3

O1

ROC

A1

REF

Figure 2-1: Amplifier Unit

STANDARD MODE

The Amplifier Unit can be tethered to the Base Station, which streams data to a
host computer. When tethered, the Amplifier Unit connects to the Base Station via
a single cable that carries power and data through a proprietary serial interface.

The Amplifier Unit is also capable of operating un-tethered. When un-tethered,

®

it will run off a battery and save data on a CompactFlash

memory card.

WIRELESS MODE

The Amplifier Unit uses Bluetooth® technology to stream data to a host computer
via a wireless connection with the Base Station. The Amplifier Unit must be within
25 feet (without obstructions) of the Base Station. The Amplifier Unit is powered
by a battery and does not use a CompactFlash card or Tether Cable.

2-2 Chapter 2 Introduction

BASE STATION

AURA-PSG Base Station

The Base Station is enclosed in a plastic housing approximately 7” W x 6” H x
2” D (17.8 cm x 15.3 cm x 5.1 cm) in size and it can be attached to a cart arm,
mounted on a wall next to a patient bed, or sit flat on a tabletop.

AURA

Figure 2-2: Base Station

The Base Station converts data from the Amplifier Unit to network protocols
for transfer to a host computer. See C

HAPTER 3 INSTALLATION, FIGURE 3-6.

The LCD display with menu controls is located on the top surface of the Base
Station. Menu selections can be made for configuring the unit, communicating
with the host computer, and implementing the electrode impedance test. The
LCD also displays status information such as electrode impedance test values.

A Te ther Cable connection port is also located on the top surface of the Base
Station. This is used to connect the Amplifier Unit to the Base Station via the
Tether Cable in standard mode. The Base Station also contains Bluetooth
technology to receive data from the Amplifier Unit in wireless mode.

®

PSG Wireless/Ambulatory Recorder 2-3

Power is supplied to the Base Station through a rear side
connector that attaches to the RPSAS40 Medical-grade
Power Supply (+12 VDC). The RPSAS40 Power Supply
module provides low-voltage (+12 VDC) to power the
Base Station. Only certified Grass-Telefactor regulated
power supplies can be used with the AURA PSG system.

A 36-pin connector is also located on the rear side and it
allows for the connection of an optional Patient
Eventbutton (CAB-21648-10). Two Auxiliary DC inputs
are available for recording external voltage sources. All
other connections are also located on the rear side of the
Base Station.

Figure 2-3: RPSAS40
Power Supply

BATTERY & BATTERY CHARGER

A rechargeable 3.6 V lithium ion battery (267592000) provides power to the
Amplifier Unit. The Battery Charger is a free-standing unit that can charge a
single battery. The Battery Charger is external and operates from a DC voltage
supplied by an external power supply.

See the separate operating instructions for the Battery Charger.

Warning: Battery Charger must not be located in a patient area.

2-4 Chapter 2 Introduction

AUXILIARY DC INPUT MODULE (DCM8)

The auxiliary DC Input Module, DCM8, is a small plastic enclosure with
eight non-isolated 3.5 mm input jacks for DC inputs and one 3.5 mm input jack
for an event pushbutton. Four of the DC inputs are single ended and four are
differential to allow for the greatest flexibility when connecting auxiliary
device outputs.

AUXILIARY DC INPUT MODULE

15

EVENT

26

37

48

SINGLE ENDED DIFFERENTIAL

DCM8

Figure 2-5: DCM8 DC Input Module

The DCM8 is supplied standard with the Model AUXL-P AURA PSG System,
but is an opion with the Model AU-P AURA PSG Portable System.

For more information regarding the compatibility of a device with the AURA
PSG system, please contact Grass-Telefactor, Technical Support Services
Department. The optional Nonin PureLight® Pulse Oximeter Sensors can be
connected directly to the Amplifier Unit.

AURA

®

PSG Wireless/Ambulatory Recorder 2-5

SYSTEM COMPONENTS

STANDARD SYSTEM COMPONENTS

The following components are included in the Model AUXL-P AURA PSG
PC-based system:

• AURA PSG Amplifier System with
Built-in Oximeter
CompactFlash card and reader
Amplifier Battery (2) with battery charger and power supply
Pouch for AURA PSG Amplifier and 4 sizes of straps

• Base Station with
Wall-mount bracket
RPSAS40 Medical-grade Power Supply
Tether cable (CAB-21916)

• NET-CKIT Network cabling kit (Base Station to Host)

• DCM8 DC Input Module with wall-mount bracket

• 20-button programmable keypad for notation entry and system

operation

• Medical-grade Isolated Power System

The following components are included in the Model AU-P AURA PSG
Portable Laptop-based system:

• AURA PSG Amplifier System with
Built-in Oximeter
CompactFlash card and reader
Amplifier Battery (2) with battery charger and power supply
Pouch for AURA PSG Amplifier and 4 sizes of straps

• Base Station with
Wall-mount bracket
RPSAS40 Medical-grade Power Supply
Tether cable (CAB-21916)

• NET-CKIT Network cabling kit (Base Station to Host)

OPTIONAL SYSTEM COMPONENTS

Refer to CHAPTER 5: ACCESSORIES & REPLACEMENT PARTS, for a list of optional
system components.

2-6 Chapter 2 Introduction

3

Installation

Setting Up for Operation

The AURA PSG System is designed to be located in the vicinity of the test
subject, but with the ability to allow patient mobility for periods of time. The
Amplifier Unit can be placed inside a pouch worn by the patient.

The Base Station itself, and the associated power supply, can be attached to a
cart or stand for routine EEG or PSG studies.

Grass-Telefactor provides a full line of mobile carts and mounting brackets.
Please consult Grass-Telefactor Customer Support for further details.

Take care to locate these components away from dirt, dust, high-temperatures,
and liquid spill hazards. Avoid locating the unit where the power switches or
controls or cables could be bumped inadvertently.

AURA

®

PSG Wireless/Ambulatory Recorder 3-1

INSTALLATION

Refer to the interconnection diagram (Figure 3-6) for connection details and
cable part numbers. To install the AURA PSG system, proceed with the
following steps.

TEP 1: INSTALLING CABLING

S
STEP 2: INSTALLING THE NETWORK INTERFACE CARD FOR ASSOCIATED COMPUTERS
STEP 3: SETTING UP THE RPSAS40 REGULATED POWER SUPPLY
STEP 4: SETTING UP THE BASE STATION
STEP 5: CONNECTING THE TETHER CABLE
STEP 6: CONNECTING AMPLIFIER UNIT INPUTS
STEP 7: CONNECTING OPTIONAL EQUIPMENT TO THE BASE STATION
STEP 8: SETTING UP THE BATTERY CHARGER
STEP 9: SETTING UP WIRELESS COMMUNICATION (WIRELESS MODE ONLY)

STEP 1: INSTALLING CABLING

Grass-Telefactor recommends that all cabling, network, video cabling, intercom
cabling, and any other cabling for auxiliary instrumentation be run by qualified
personnel under hospital supervision and according to local standards and
regulations.

It is good practice to use an approved isolation transformer when
interconnecting multiple pieces of equipment to the AURA PSG system to
avoid summation of leakage currents. The use of an isolation transformer
reduces the leakage current to that of the isolation transformer. If an isolation
transformer is to be used it should be EN60601-1 approved and rated for
115/240 VAC, 50/60 Hz, 600-800 VA.

STEP 2: INSTALLING THE NETWORK INTERFACE CARD

ASSOCIATED COMPUTERS

FOR

The AURA PSG system may be supplied with an optional network interface
card for computers associated with the AURA PSG system. Follow the
instructions that are supplied with this card to install and test the interface card
before connecting to the AURA PSG system.

3-2 Chapter 3 Installation

STEP 3: SETTING UP THE RPSAS40 REGULATED POWER SUPPLY

Select an appropriate location that will allow for ventilation around the unit
and the outlet to be within safe reach of the Base Station. The power cable
should be run so as it will be out of the way and not be a tripping hazard.

POWER SUPPLY LINE VOLTAGE

The RPSAS40 will operate with line voltage within the range of 100 to 250
volts, covering both 115 and 230 volts operation with no user intervention.
The proper hospital-grade AC power cord is required.

STEP 4: SETTING UP THE BASE STATION

The Base Station can be located remotely from or locally to the host
computer. Depending on the setup, the network cable required will be either a
cross-over or patch 10BaseT Ethernet cable rated category 5 or higher.

If a direct connection is used, a single cross-over cable is required
(CAB-20576-03). If going through a dedicated hub or switch, a patch cable is
required (CAB-21064-025 or CAB-21064-010). A networking cable connector
(CON-20486) is also provided. Select the appropriate cable and connect the
Base Station to the host computer.

AURA

®

PSG Wireless/Ambulatory Recorder 3-3

STEP 5: CONNECTING THE TETHER CABLE

AURA-PSG Base

Station

AU

RA

PSG

DC1

RAT

Snore

Airflow

SpO2
Pulse

ECG+
CH13
Chin3
Chin1
C3
O1
ROC
A1
REF

Connect one end of the tether
cable to the Base Station by
inserting the connector
into place, as indicated
below. To disconnect
the tether cable
(26802001), pull on the
outer sleeve of the
connector to unlock
it from the unit.

Figure 3-1: Base Station tether cable connection (standard mode)

Note: Do not twist the connector or damage will result.

Connect the other end of the tether cable to the
Amplifier Unit.

Figure 3-2: Amplifier Unit tether cable connection (standard mode)

3-4 Chapter 3 Installation

STEP 6: CONNECTING AMPLIFIER UNIT INPUTS

R

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C

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1

C

3

C

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in

1

C

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in

3

C

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1

3

E

C

G

+

R

E

F

G

N

D

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2

L

O

C

O

2

C

4

C

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in

2

C

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C

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S

n

o

re

+

R

A

T

-

R

A

T

+

D

C

1

G

N

D

C

h

e

st-

C

h

e

st+

A

b

d

-

A

b

d

+

L

A

T

-

L

A

T

+

D

C

2

G

N

D

Attach the inputs to the Amplifier Unit.

Figure 3-3:
Amplifier Unit
connections

The following inputs are available
through the Amplifier Unit:

RA

PSG

AU

1

C

T

re

D

w

A

o

R

n

2

S

irflo

O

A

lse

+

p

u

G

S

P

3

13

1

C

in

H

E

in

h

C

h

C

3

C

C

1

C

O

O

F

1

R

E

A

R

• 13 referential electrode inputs

•2 reference electrode inputs

•7 differential inputs

AURA

®

PSG Wireless/Ambulatory Recorder 3-5

•2 DC coupled inputs

•1 connection for a Nonin

®

PureLight

pulse-oximeter

A list of compatible sensors is
provided in C

REPLACEMENT PARTS.

AND

HAPTER 5: ACCESSORIES

Figure 3-4: Amplifier Unit inputs

STEP 7: CONNECTING OPTIONAL EQUIPMENT TO THE BASE STATION

Attach any additional equipment. Refer to Figure 3-6 for required cable numbers
and connection locations.

Figure 3-5: Base Station
Connections

need info on
the antenna

To Optional
Event Button
or DCM8

Reserved

Ethernet Cable
to Computer

To RPSAS40
Power Supply

Waveforms from AUX 1 and AUX 2 DC input ports are only recorded when the

Amplifier Unit is tethered to the Base Station. Some connections are reserved
and should not be used.

STEP 8: SETTING UP THE BATTERY CHARGER

See the separate operating instructions for the Battery Charger.

STEP 9: SETTING UP WIRELESS COMMUNICA TION (WIRELESS MODE ONLY)

If the Amplifier Unit is used in wireless mode, the wireless connection between
it and the Base Station must be established. This process is not required for the
Amplifier Unit in standard mode.

1. Connect the tether cable between the Base Station and Amplifier Unit, as
indicated in STEP 5 CONNECTING THE TETHER CABLE.

2. Turn on the Base Station power.

3. Turn on the Amplifier Unit power.

4. Select Set Wireless Pairing on the Base Station menu. Then press the
ENTER key.

5. The Base Station will display Setting up Wireless.

6. The Base Station will exchange wireless device addresses with the
Amplifier Unit automatically, and then confirm the wireless connection.

7. The Base Station will display Wireless Confirmed.

8. Any time the Base Station and Amplifier Unit are both on and no tether
cable is connected, the paired units will attempt to connect with each
other. They will connect only with each other, and attempts by a third

3-6 Chapter 3 Installation

AURA

®

PSG Wireless/Ambulatory Recorder 3-7

Figure 3-6: AURA PSG connections

Optional Event Button
CAB-21648-10

DCM8

AUXILIARY DC INPUT MODULE

15

26

37

48

SINGLE ENDED DIFFERENTIAL

need info on

the antenna

AURA PSG Setup

DC1

RAT

Snore

Airflow

Pulse

ECG+

Chin1

C3

O1

ROCA1REF

Amplifier Unit

Wireless Mode Requires No Tether Cable

26802001

Te ther Cable

Base Station

EVENT

DCM8

SpO2

CH13

Chin3

RPSAS40 Regulated

Power Supply

PSG

AU

RA

AC Power

Line In

To Gr ounded

Wall Outlet

Optional Event Pushbutton
CAB-21648-10

CAB-21617

CON-20486 Networking

Cable Connector

To PC

Ethernet

Card

or

CAB-20576-03

Ethernet Cross-over

CAB-21064

Ethernet Patch

Cable

or

To Ethernet Hub or Switch

Cable

device to connect will be rejected.

SIGNAL DEFINITIONS

The Amplifier Unit includes labels for each input as a convenience to the user. The

connector marked SpO2 Pulse is intended for a Pulse Oximeter sensor. Only those

sensors listed in the Accessories section of this manual should be used.

Other connector labels match the default montage used by TWin software for
the AURA PSG. Following are signal definitions associated with these.

Referential Inputs (AC coupled) with SAFELEAD® connections

O1 & O2 Occipital electrodes as defined by the 10/20 standard
C3 & C4 Central electrodes as defined by the 10/20 standard
A1 & A2 Auricular electrodes as defined by the 10/20 standard
LOC & ROC Left and Right Outer Canthus electrodes
Chin There are three electrodes provided for the chin

CH12 & CH13 Optional electrodes

The Referential Inputs are designed for surface electrodes such as those

manufactured by Grass and suggested in ACNS 1994 Guideline 1 (2.1). The REF

connects to the electrode used as the reference for Referential Inputs. The two
inputs with this label are connected together inside the device so that redundant
electrodes can be used.

Differential Inputs (AC coupled)

ECG ECG electrode pair (SAFELEAD)
Chest & Abd Respiratory effort sensors (such as belts)
Airflow Airflow sensor (such as thermocouples and thermistors)
Snore Snore sensor (such as a microphone)
LAT & RAT Left and Right Anterior Tibialis muscle electrodes

The Differential Inputs are intended for electrodes and sensors specifically
designed for use with electrode compatible inputs. Appropriate electrodes and
compatible sleep sensors are available from Grass-Telefactor as well as other
vendors. Additional guidance can be found in ACNS 1994 Guideline 15.

Auxiliary Inputs (DC coupled)

DC1 & DC2 Optional signal inputs

Warning: All these inputs are connected to the patient side of the isolation

barrier. Never connect any of these inputs to a monitor or other
device unless it is fully isolated for patient safety.

Warning: ECG and pulse oximetry measurements are not intended for use

in vital signs monitoring. In any critical care environments, an
independent monitor must be provided.

3-8 Chapter 3 Installation

HOST COMPUTER SETUP

Power up the Base Station and enter a valid IP address for the unit. Computers
associated with the AURA PSG system should have the recording application
software installed and configured to work with this IP address to control the
Base Station. See below for more information.

If Grass-Telefactor TWin software is used on the host computer, refer to the
TWin software manual for details on the operation of the system. A system
calibration and test recording should be preformed following the instructions
supplied in the TWin manual.

AURA PSG IP ADDRESS SETUP

This section will provide instructions on programming the IP address of the
AURA PSG system. If applicable, it is possible choose an IP address that is
consistent with the existing networking scheme of the hospital.

1. Make sure the Base Station is powered on.

2. On the Base Station, push the MENU key four times to display the Set IP
Address option, and then press the ENTER key.

3. Use the left and right keys to toggle to the next numeric entry.

4. Use the up and down keys to change the numeric value.

An example IP address is: 172.016.008.200

5. When the IP address is finished, push the ENTER key to accept the entry.

AURA

Note: If the MENU key is pressed while changing the IP address, the

modifications will not be saved.

SUBNET MASK SETUP

This section will provide instructions on programming the Subnet Mask of the
AURA PSG system.

1. Make sure the Base Station is powered on.

2. On the Base Station, push the MENU button five times to display the
Set Subnet Mask option, and then press the ENTER button.

3. Use the up and down buttons to change the numeric value.

An example Subnet Mask is: 255.255.255.000

4. When the Subnet Mask is finished, push the ENTER button to accept

the entry.

®

PSG Wireless/Ambulatory Recorder 3-9

AURA VERSION

To check the version of the AURA amplifier before connection to application
software on the host computer:

1. Make sure the Base Station is powered on.

2. On the Base Station, push the MENU button six times to display the
AURA Version option, and then press the ENTER button.

3. The version of firmware and software will be displayed.

NETWORK INTERFACE CARD (NIC) IP ADDRESS SETUP

This section will provide instructions on configuring computers associated with
the AURA PSG system. The IP address used for this section is different than the
one entered in the previous section. If applicable, it is possible to choose an IP
address consistent with the existing networking scheme of the hospital.

1. From the Windows task bar, select Start > Settings >

2. Double-click on the Network and Dial up Connections icon.

3. In the Network and Dial up Connections window, double-click on the icon
that represents your NIC. This may be listed as Local Area Connection.

4. In the Status window, click on the Properties button.

5. Highlight Internet TCP/IP protocol by clicking on it once, then click
Properties. The Internet Protocol (TCP/IP) Properties window will appear.

Control Panel

.

3-10 Chapter 3 Installation

Figure 3-8: Internet Protocol (TCP/IP) Properties window

6. Select Use the following IP address.

7. Enter an IP address that fits within the same series as the AURA PSG.
Remember, the IP address here cannot be the same as the one used in the

AURA PSG IP Address. An example IP address is: 172.16.8.199, or

172.16.8.201.

8. It may be necessary to change the Subnet Mask to 255.255.0.0.

9. Click OK when finished.

10. Close all windows and reboot the computer.

AURA

®

PSG Wireless/Ambulatory Recorder 3-11

3-12 Chapter 3 Installation

4

AURA-PSG Base Station

Operation

The AURA PSG requires a host computer with appropriate software to be attached
via a network cable to setup the system parameters. This section is an overview of
the controls, indicators, and other features available for use on the unit.

BASE STATION

The controls available on the Base Station include the DC power switch on the rear
and eight keys associated with the LCD. There are eight pushbuttons, or keys, for
interacting with the Base Station and the host computer. Some of the selections in
the menu require the host computer to be connected to the Base Station.

AURA

®

PSG Wireless/Ambulatory Recorder 4-1

Figure 4-1: Base Station Front Panel Controls

MENU SYSTEM

The MENU key is used to toggle through the main menu items or to back out of
a menu selection or submenu. ENTER selects the item to execute or proceed to

a submenu item. The following list describes each key on the Base Station and a
brief description of its use.

MENU key toggles through the menu items or backs out of a

menu selection back to the previous level. While in a

submenu or selection the MENU key can be used to cancel

and return back to the main menu.

Provides no function for AURA PSG.

The left/right arrows are used to navigate through a
submenu list.

The up/down arrows are used to scroll through status
information such as electrode impedance results.

The ENTER key selects the item to execute or proceeds

to a submenu.

E-TEST provides a shortcut to turn the electrode test

function on without going through the menu selection
process.

The following menu options are available:

Status Reports communication errors with the data transfer.

®

Oximeter Display*Displays the current readings of the Nonin PureLight

Pulse

Oximeter on the LCD.

Set IP Address** Allows an IP address for the device to be entered. Used to

set the IP address of the Base Station. The left/right keys
activate the number in IP address to be changed and the
up/down keys increment/decrement the active number.

ENTER accepts the IP address.

4-2 Chapter 4 Operation

Check
Impedances* Requests the host computer monitoring software to

perform an electrode test and return the results for display.
Z limit impedance selections include: 0.1, 0.5, 1, 2, 5, 10, 20,
100 kohm.

Press ENTER to select and use the left/right keys in the Z
limit selection menu. ENTER to execute the request. Use the

up/down keys to scroll through the results returned from

the application software on the host computer. MENU

returns to the main menu item list.

E-TEST key executes a request to the application software

on the host computer to perform an impedance test using

the last Z limit selected. Press ENTER to begin calibration.

Warning: The electrode impedance test should not be used with

intra-cranial electrodes.

Calibrate* Requests the host computer monitoring software to perform

a calibration for each channel.

* Only available when connected to application software on host computer.

** Only available when not connected to application software on host computer.

INDICATORS

A power indicator is located above the LCD and is green when the Base Station
power is on. The LCD displays the menus, electrode impedance results,
connection status, and any error messages that may occur.

Additionally, two indicator lights are used by the Ethernet connection on the
back of the Base Station. The green light indicates the Base Station is attached
to an active node, and the yellow light indicates communication activity over
the connection.

AURA

®

PSG Wireless/Ambulatory Recorder 4-3

AMPLIFIER UNIT

AU

RA

PSG

DC1

RAT

Snore

Airflow

SpO2
Pulse

ECG+
CH13
Chin3
Chin1
C3
O1
ROC
A1
REF

The controls on the Amplifier Unit are used to
turn the power on and off.

POWER BUTTONS

Turns the Amplifier Unit power off.

The button must be held for up to
twenty seconds to turn the power
off. This feature helps ensure the

power is not turned off accidentally.

In error conditions, it may be necessary to
hold the Power Off button in for a
minimum of 30 seconds to turn off the
Amplifier Unit power.

Turns the Amplifier Unit power on.

Figure 4-2: Amplifier Unit Controls

4-4 Chapter 4 Operation

INDICATORS

There are three indicator lights on the Amplifier Unit. One green indicator light
provides information about the power status of the Amplifier Unit. Two amber
indicator lights are provided. One amber light provides information about the
connection between the Amplifier Unit and Base Station. The other amber light
provides information about the Nonin pulse oximeter.

GREEN POWER INDICATOR

Steady Amplifier Unit is powered by the tether cable

(standard mode).

Flashing Amplifier Unit is powered by battery.
Off Amplifier Unit is not functioning.

AMBER LINK INDICATOR

Steady The Amplifier Unit is connected to the Base Station

via the tether cable (standard mode).

Flashing Once every two seconds: The Amplifier Unit is

recording to a CompactFlash Card (standard mode).

Flashing Once per second: The Amplifier Unit is within range

of the Base Station (wireless mode).

Flashing Faster than once per second: The Amplifier Unit is

finishing writing data to the CompactFlash Card
(standard mode). This happens when the
CompactFlash has filled or if the user is attempting to
turn off the amplifier while it is writing data to the
CompactFlash. In the latter case the user can release
the power off button, the amplifier will turn off when
it is finished, usually within 30 seconds.

AURA

AMBER PULSE OXIMETER INDICATOR

Flashing The pulse oximeter is reading a pulse between

20 and 200.

®

PSG Wireless/Ambulatory Recorder 4-5

COMPACTFLASH CARD & BATTERY

The Amplifier Unit in standard mode, when untethered, is powered by an internal
battery and saves data on a CompactFlash memory card. CompactFlash is an
industry standard removable storage media. The battery is capable of running the
Amplifier Unit in standard mode for approximately 12 hours.

The Amplifier Unit in wireless mode is powered by the same internal battery,
but does not use a CompactFlash card. The battery is capable of running the
Amplifier Unit in wireless mode for approximately 10 hours.

To open the CompactFlash/Battery
compartment, press the tab
on the battery cover and
slide the cover outward.
Set the cover aside.

Figure 4-3: CompactFlash Card & Battery

The CompactFlash card drive is located behind the battery compartment. For
standard mode operation, slide the CompactFlash card into the drive. The top
of the card must face the bottom of the Amplifier Unit to be oriented properly
for insertion (see Figure 4-3). To remove the card, simply pull it out of the
drive. For wireless mode operation, do not insert a CompactFlash card.

Two batteries are shipped with each Amplifier Unit and will need to be
charged prior to each use. Insert a fully-charged battery into the battery
compartment. Be sure to orient the battery correctly (see Figure 4-3).

Warning: Use only the specified battery (26759200) in the AURA PSG.

Use of unauthorized battery may cause explosion/fire hazard.

To reattach the cover, slide the cover back into position. The tab will lock the
cover in place.

4-6 Chapter 4 Operation

BATTERY CHARGER

The battery must be charged prior to each use. See the separate operating
instructions for the Battery Charger.

Warning: Battery Charger must not be located in a patient area.

CALIBRATION

The AURA PSG system includes a built-in calibration signal generator and the
means to connect this generator to the referential amplifier inputs at the first stage

preamplifier. The generator outputs a 5 Hz, 500 µV peak-to-peak square wave. The

frequency of this source can be set by the host computer but is generally 5 Hz.
Gain calibration and correction is critical to the accurate creation of montages from
the referentially recorded data. It is recommended that a calibration procedure be

performed prior to every recording as standard practice.

Calibration controls are only available in the application software. However a
request can be sent from the Base Station via a menu item to have the application
software automatically perform a calibration. Refer to the instructions for
calibrating the amplifier hardware in the TWin software manual for more details.
Typically calibration involves starting the recorder software, putting the AURA
PSG into calibration mode, recording a segment of the calibration signal then
confirming the peak-to-peak value of the AC calibration signal. This data is then
used to automatically generate a list of correction values for both offset and gain.

ELECTRODE IMPEDANCE TEST

The AURA PSG system includes a built-in electrode test circuit that tests the
impedance of each electrode, including the reference, for referential inputs. This
function can be executed from either the application software or at the Base Station

itself. The E-TEST key on the Base Station calls this function and the results are

displayed on the LCD, based on the preferences set in the application software. If
the application software is not present this function cannot be selected.

Warning: The electrode impedance test should not be used with

intra-cranial electrodes.

AURA

®

PSG Wireless/Ambulatory Recorder 4-7

RECORDING OVERVIEW

TETHERED RECORDING

During tethered recording, the Amplifier Unit is used in standard mode. It
operates while connected to the Base Station via a tether cable. Signals are
streamed to the host via this connection.

During tethered recording, use caution to avoid contact with the Amplifier
Unit “Off” button. The “Off” button must be held for 10 to 20 seconds to turn
the power off. This feature helps ensure the power is not turned off
accidentally.

Ensure the following components are available for tethered recording:

• Amplifier Unit with Tether Cable — The Amplifier Unit with Tether

Cable will be used to send signals to the Base Station.

• Base Station — The Base Station is used to configure the Amplifier Unit.

• Host Computer with TWin Software — The computer and TWin

software is used to initiate remote recording and review recordings.

•Electrodes & Sensors — These measurement components will be used

to connect the patient input signals to the Amplifier Unit.

STARTING TETHERED RECORDING

The process for starting tethered recording requires the following steps:

1. Connect the Amplifier Unit to the Base Station via the Tether Cable.

2. Connect the patient electrodes to the Amplifier unit.

3. Configure the Amplifier Unit using the Base Station and associated TWin
host software.

4. Initiate recording using the TWin Recording feature. Waveforms will
display in the TWin software waveform area.

Warning: Protect the Amplifier Unit from exposure to liquids. If the

Amplifier Unit is exposed to liquids during recording,
discontinue use by disconnecting the electrodes from the
Amplifier unit and turning off the Amplifier Unit power.
Resumption of recording is to be performed only by qualified
personnel.

STOPPING TETHERED RECORDING

Recording is stopped using the TWin software.

4-8 Chapter 4 Operation

AMBULATORY RECORDING

During ambulatory recording, the Amplifier Unit is used in standard mode.
When untethered, the Amplifier Unit will run off a battery and save data on a

®

CompactFlash
Unit for approximately 12 hours.

During untethered recording, use caution to avoid contact with the Amplifier
Unit Off button. The Off button must be held for 10 to 20 seconds to turn the
power off. This feature helps ensure the power is not turned off accidentally.

Ensure the following components are available for tethered recording:

• Amplifier Unit with Tether Cable — The Amplifier Unit with Tether
Cable will be used to set up and initiate the recording.

• CompactFlash Card & Battery —A CompactFlash card and fully­charged battery should be installed in the Amplifier Unit prior to
recording.

• Base Station — The Base Station is used to configure the Amplifier Unit.

• Host Computer with TWin Software — The computer and TWin

software is used to initiate remote recording and review recordings.

•Electrodes & Sensors — These measurement components will be used
to connect the patient input signals to the Amplifier Unit.

memory card. The battery is capable of running the Amplifier

STARTING AMBULATORY RECORDING

The process for starting ambulatory recording requires the following steps:

1. Connect the Amplifier Unit to the Base Station via the Tether Cable.

2. Connect the patient electrodes to the Amplifier Unit.

3. Configure the Amplifier Unit using the Base Station and associated TWin
host software.

4. Initiate recording using the TWin Recording feature.

5. Turn the Amplifier Unit power off and disconnect it from the Base Station.

6. To start ambulatory recording, turn the Amplifier Unit power on

Warning: Protect the Amplifier Unit from exposure to liquids. If the

Amplifier Unit is exposed to liquids during recording, the
patient should discontinue use by disconnecting the electrodes
from the Amplifier Unit and turning off the Amplifier Unit
power. Resumption of recording is to be performed only by
qualified personnel.

AURA

®

PSG Wireless/Ambulatory Recorder 4-9

STOPPING AMBULATORY RECORDING

To stop ambulatory recording, press and hold the Off button on the
Amplifier Unit until the Amplifier Unit is turned off. This process may require
up to 30 seconds. The Amplifier Unit will turn off and recording will stop.

READING AMBULATORY DATA

The process for reading ambulatory data requires a computer with a
CompactFlash Card reader and software that can open the data files on the
card. The Base Station cannot be used to upload the data to the computer.

When the extended ambulatory recording process is complete, the resulting
data files will be stored on the CompactFlash Card in the Amplifier Unit. The
data is stored using a specific protocol.

Grass-Telefactor TWin software can be used on the host computer to read the
file and process the data. The TWin software is powerful and easy to use,
providing data acquisition, recording, and review capabilities in one flexible
package.

Remove the CompactFlash Card from the Amplifier Unit. Then insert it into the
CompactFlash Card reader on the computer. Although TWin software can read
directly from the CompactFlash Card, it is recommended that data files be
copied to a different medium such as the computer’s hard disk for further
review and analysis.

4-10 Chapter 4 Operation

WIRELESS RECORDING

The Amplifier Unit in wireless mode uses Bluetooth® technology to stream
data to a host computer via a wireless connection with the Base Station.
The Amplifier Unit must be within 25-feet (7.5 m), without obstructions, of
the Base Station.

The Amplifier Unit in wireless mode is powered by a battery and must not
have a CompactFlash Card or Tether Cable attached.

Ensure the following components are available for recording:

• Amplifier Unit — The Amplifier Unit will be used to send signals to
the Base Station.

• Battery — A fully-charged battery should be installed in the wireless
Amplifier Unit prior to recording.

• Base Station — The Base Station is used to configure the Amplifier Unit.

• Host Computer with TWin Software — The computer and TWin

software is used to initiate remote recording and review recordings.

•Electrodes & Sensors — These measurement components will be used
to connect the patient input signals to the Amplifier Unit.

STARTING RECORDING

The process for starting recording requires the following steps:

1. Ensure the Amplifier Unit is within 25-feet (7.5 m) of the Base Station.

2. Connect the patient electrodes to the Amplifier Unit.

3. Configure the Amplifier Unit using the Base Station and associated TWin
host software.

4. Initiate recording using the TWin Recording feature. Waveforms will
display in the TWin software waveform area.

Warning: Protect the Amplifier Unit from exposure to liquids. If the

Amplifier Unit is exposed to liquids during recording,
discontinue use by disconnecting the electrodes from the
Amplifier Unit and turning off the Amplifier Unit power.
Resumption of recording is to be performed only by qualified
personnel.

STOPPING RECORDING

Recording is stopped using the TWin software.

AURA

®

PSG Wireless/Ambulatory Recorder 4-11

4-12 Chapter 4 Operation

5

Accessories & Replacement Parts

Accessories & Replacement Parts

Part Number Description

14193512 512 MByte CompactFlash Memory Card
26759200 Rechargeable 3.6 V lithium ion battery
42050100 Battery Charger
RPS-21903 Battery Charger Power Supply
RPSAS40 AURA PSG Regulated Power Supply
IPS115 Isolated power system, 115-volt operation only
IPS230 Isolated power system, 230-volt operation only
CAB-21648-10 Optional Event pushbutton, 10’ (3 m) cable length, other

lengths available
DCM8 DC Input Module for up to 8 DC channels
KBD-21203-20 20-button Keypad for notation entry and system operation
KBD-21203-58 Optional 58-button Keypad for notation entry and system

operation
32760200 AURA PSG Amplifier Pouch
32760404 AURA Pouch Strap, Adult Large
32760403 AURA Pouch Strap, Adult Small
32760402 AURA Pouch Strap, Pediatric Large
32760401 AURA Pouch Strap, Pediatric Small
ACS-21651 Dedicated Ethernet Card for Base Station connection

for use with a PC
ACS-20944-01 Dedicated Ethernet/Modem Card for Base Station

connection for lap-top use

AURA

®

PSG Wireless/Ambulatory Recorder 5-1

OXIMETER SENSORS

Part Number Description

8000J Adult Flex Sensor, straight, 3-foot (1 m) length cable,

®

includes a package of 25 8000JFW FlexiWrap

Sensor

Wraps

8000JFW FlexiWrap

®

Sensor Wraps, package of 25

8008J Infant Flex Sensor, straight, 40" (1 m) length cable,

®

includes a package of 25 8008JFW FlexiWrap

Sensor

Wraps

®

8008JFW Infant FlexiWrap

Sensor Wraps, package of 25

7000A Adult Finger Flexi-form Disposable Sensors, 40" (1 m)

length cable, package of 10

7000P Pediatric Finger Flexi-form Disposable Sensors, 40" (1 m)

length cable, package of 10

8000AA Adult Articulated Finger Clip Sensor, 40" (1 m)

length cable
8000AP Pediatric Finger Clip Sensor, 40" (1 m) length cable
8500I Patient Extension Cable, 40" (1 m) length cable

CABLES/ADAPTORS

Part Number Description

26802001 Tether cable, 30-foot (10 m) length (Amplifier to Base Station)
CAB-21916 Interface cable, 1/8” phone plug to PLU-880,

5-foot (1.5 m) length (CPAP to DCM8)
CAB-21615-5 DCM8 to Base Station patch cable, 5-foot (1.5 m) cable
CAB-21616-10 Phono to 3.5 mm 10-foot (3 m) cable. Used to connect

the CAB-21648 event button to the DCM8 (included with

CAB-21648)
CAB-21617 Event button to Base Station adaptor, used to connect an

event button directly to the base when an optional

DCM8 DC Input Module is not available,

1-foot (0.3 m) cable length
MCB-21678-03 AC Cordset IEC320, 3-foot (0.9 m) cable
MCB-20018 Hospital-grade AC cordset, USA, 6-foot (1.8 m) cable
CAB-21911 Adaptor: (2) 1.5 mm SAFELEAD to Key Connector

NET-CKIT Network Cabling Kit includes:

CAB-21064-010 Ethernet cable, patch. Used to connect Base Station to Host

via a hub/switch, 10-foot (3 m) cable
CAB-21064-025 Ethernet cable, patch. Used to connect Base Station to Host

via a hub/switch, 50-foot (15 m) cable
CAB-20576-03 Ethernet cable, cross-over. Used to directly connect Base

Station to Host, 3-foot (0.9 m) cable
CON-20486 Ethernet cable connector. Used to daisy chain two Ethernet

cables (RJ45 connectors) together.

5-2 Chapter 5 Accessories & Replacement Parts

CARTS & MOUNTING BRACKETS

Part Number Description

IT8/L Mobile Cart for use with a lap-top computer
IT9 Mobile Rack Cart with drawer for full size keyboard,

for use with a desktop PC

ARM-AS40 Adjustable Arm for mounting the Base Station on a Mobile

Cart
AS40WMB Base Station wall-mount bracket
AS40WMB-QR Optional Base Station wall-mount bracket with quick release

GRS-8399 DCM8 wall-mount bracket
ARM-AS40-QR Optional Adjustable Quick Release Arm for mounting the

AURA on a Cart

TWIN PSG REVIEW WORKSTA TION

Part Number Description

TRW-PSG Latest high-performance PC*, network ready and modem,

CD-R/RW internal, Grass-Telefactor TWin PSG Review/

Analysis software, Archive Manager, TWinLOOK, Microsoft

Office, pcAnywhere software
FPM-18 18" flat-panel/LCD monitor
FPM-20 20" flat-panel/LCD monitor
ACS-21789 Flat-panel/LCD monitor wall-mount bracket

AURA

®

PSG Wireless/Ambulatory Recorder 5-3

5-4 Chapter 5 Accessories & Replacement Parts

6

Maintenance

Maintenance

There is no routine maintenance required for the Grass-Telefactor AURA PSG
systems other than normal periodic checks for unusual wear, cable abrasion,
and routine cleaning.

CALIBRATION

The AURA PSG includes a built-in calibration signal source for verifying
proper operation and to simplify cross-channel gain correction and offset
adjustment. The calibration mode should be used to periodically generate a list
of correction factors for use during the display and processing of the signal
data. Refer to the appropriate recording software instructions for details.

AURA

®

PSG Wireless/Ambulatory Recorder 6-1

CLEANING

Perform cleaning as needed.

Warning: Electric Shock Hazard. Before cleaning the AC power supply or

any AC line powered equipment, always turn off the power and
disconnect the power cord from the AC power supply.

Cautions

• Do not autoclave or pressure sterilize the AURA PSG system.

• Do not soak or immerse the AURA PSG system in any liquid.

• Do not gas sterilize the AURA PSG system.

• Do not use petroleum based or acetone solutions, or other harsh
solvents to clean the AURA PSG system.

To clean the AURA PSG system, use a soft cloth dampened with mild soap and
water solution. To disinfect the Amplifier unit use 70% isopropyl alcohol. Be
sure that the components are unplugged before cleaning and that the
components are completely dry before use.

ELECTRODES

Refer to the cleaning instructions supplied with the electrodes for details on
cleaning, disinfection, and/or sterilization.

STORAGE & TRANSPORTATION

For storage and transportation, it is recommended that the system and its

accessories be within the temperature range of -40 to 70° C, 500 to 1060 hPa,

and 10 to 100% RH, including condensation. When returning from temperature
extremes, allow the system to stabilize to room temperature before use.

END-OF-LIFE DISPOSAL

When disposing of the AURA PSG system components at the end of life, it is
recommended that federal, state and local laws be followed for proper disposal
of printed circuit boards, lithium-ion batteries, and plastic parts.

Never incinerate or dispose of lithium-ion battery cells into fire.

For disposal of non-Grass-Telefactor accessories, please follow the instructions
included with these items.

6-2 Chapter 6 Maintenance

7

Troubleshooting Guide

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PSG Wireless/Ambulatory Recorder 7-1

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7-2 Chapter 7 Troubleshooting Guide

A

Appendix A

Connector Pin-outs

ETHERNET CABLE, CROSS-OVER

Used to connect Base Station directly to the Host computer.

Connector type: RJ45

Pin 1 = Pin 3
Pin 2 = Pin 6
Pin 3 = Pin 1
Pin 4 = Pin 4
Pin 5 = Pin 5
Pin 6 = Pin 2
Pin 7 = Pin 7
Pin 8 = Pin 8

AURA

ETHERNET CABLE, PATCH

Used to connect Base Station and Host computer through a dedicated
networking hub/switch.

Connector type: RJ45

Pin 1 = Pin 1
Pin 2 = Pin 2
Pin 3 = Pin 3
Pin 4 = Pin 4
Pin 5 = Pin 5
Pin 6 = Pin 6
Pin 7 = Pin 7
Pin 8 = Pin 8

®

PSG Wireless/Ambulatory Recorder A-1

A-2 Chapter A Connector Pin-outs

B

Appendix B

Service Policy & Warranty

Warranty repair and service for this system must be performed by a
Grass-Telefactor service representative or at the Grass-Telefactor factory.
To contact Grass-Telefactor, refer to the SERVICE AND WARRANTY on the
following pages.

Do not use malfunctioning equipment. Make all necessary repairs or have the
equipment repaired by a Grass-Telefactor service representative. After repair,
test the complete system to verify that it complies with the published
specifications.

Warning Do not open or remove the covers of the components. An

operator may only perform maintenance procedures specifically
described in this manual. Refer servicing to qualified service
personnel trained in the repair of this equipment.

Detailed circuit diagrams, components part lists, mechanical drawings, etc. are
available for service purposes on formal request from Grass-Telefactor.

AURA

®

PSG Wireless/Ambulatory Recorder B-1

B-2 Chapter B Service Policy & Warranty