Articulate Instruments PTU User Manual

Electropalatograph portable training unit

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PTU

™

0473

USERS MANUAL

Revision 1.10

ELECTROPALATOGRAPH

PORTABLE TRAINING UNIT

Address:

Articulate Instruments Limited

Queen Margaret Campus, Queen Margaret University Drive

Musselburgh EH21 6UU

Phone: +44 (0)131 474 0000

Fax: +44 (0)131 474 0001

Email:support@articulateinstruments.com

Information in this document is subject to change without notice and does not represent a

commitment on the part of Articulate Instruments Ltd. No part of this manual may be

reproduced or transmitted in any form or by any means, electronic or mechanical, including

photocopying and recording, for any purpose without the written permission of Articulate

Instruments Ltd.

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Summary of Contents for Articulate Instruments PTU

Page 1 Information in this document is subject to change without notice and does not represent a commitment on the part of Articulate Instruments Ltd. No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, for any purpose without the written permission of Articulate Instruments Ltd.
Page 3: Table Of Contents
Manual for PTU System. Document No. PTUManual_1.10 Contents Definitions......................3 Warranty......................3 CE Marks on electrical devices................ 3 General EMC (Electromagnetic Compatibility) Guidelines ......3 Electromagnetic Interference..............3 Declaration of Conformity ................4 Safety Precautions ..................5 Some Do’s and Don’ts on the Safe Use of the WinEPG™ System ....5 Getting Started ....................
Page 4: Definitions
Articulate Instruments Ltd warrants the Electropalatograph against defects in materials and workmanship for a period of one year from receipt by the user. During that warranty period, Articulate Instruments will either, at its option, repair or replace products, which prove to be defective. Articulate Instruments can accept no responsibility if the Electropalatograph is used other than in accordance with the instructions supplied.
Page 5: Declaration Of Conformity
Manual for PTU System. Document No. PTUManual_1.10 Declaration of Conformity Marking Manufacturer: Articulate Instruments Ltd. Queen Margaret Campus Queen Margaret University Drive Musselburgh EH21 6UU +44 (0)131 474 0000 +44 (0)131 474 0001 (Facsimile) Product Designation: Electropalatograph (Models WinEPG and PTU) The above mentioned products meet the essential requirements of: 1.
Page 6: Safety Precautions
(except the palate) to rain or moisture. CAUTION • When you are not using the PTU™ system for a long period of time, it is recommended that you remove the batteries from the PTU™ unit. • Refer internal servicing to qualified service personnel.
Page 7: Getting Started
All documentation, airway bills and packing materials should be retained in order to establish claims. After notifying the carrier of shipping damage, please also advise Articulate Instruments so that we may assist in damage claims and supply replacement equipment if necessary.
Page 8: Epg Palate
Manual for PTU System. Document No. PTUManual_1.10 A.Carry case B. Palate case C. Portable Training Unit E.Multiplexer D. Chrome handgrip G. Freeze button F. EPG palate Figure 1 PTU™ system hardware EPG palate The EPG palate (1F) comprises an acrylic palate fitted with 62 silver contacts wired to a multiplexer input connector.
Page 9: Ptu
The Portable Training Unit (PTU™)(Figure 3) controls and scans the input from the multiplexer, then decodes and displays the EPG contact pattern at around 300 times a second. The PTU™ incorporates an on/off switch (2C), a battery indicator (2B) and a threshold adjustment control (2D). The PTU™ is powered by 6 AA batteries and is designed to last for many hours before needing to change the batteries.
Page 10: System Setup
The Portable Training Unit is simple to use; with only one user control: An on/off switch. 1. Switch on the PTU™ to check the battery level. If the needle on the battery meter is in the red region then the batteries need to be replaced.
Page 11: Using The Freeze Button
Figure 4 Palate plugged into multiplexer Using the Freeze button The “freeze button” is an optional extra for the PTU. It consists of a robust “click-ON-click-OFF” button switch in an ergonomic handgrip suitable for both right and left-handed users (Figure 4)
Page 12: Replacing The Batteries
Replacing the Batteries Six AA type batteries are used to power the PTU. Three battery compartments are located on the rear panel of the PTU. Each compartment takes 2 AA size 1.5V batteries. Alkaline batteries are recommended but it is possible to use any type of battery including rechargeable ones.
Page 13: Adjusting The Palate Threshold
Manual for PTU System. Document No. PTUManual_1.10 A. AA size 1.5Vbattery (+ve end) B. Battery compartment cap Figure 4. Battery replacement Adjusting the Palate Threshold The threshold adjustment control (2D) on the front panel will have been set following manufacture and SHOULD NOT NEED TO| BE CHANGED but if the display tends to have contacts stick on or the display flickers when contacts are on then it is possible to adjust the threshold to obtain reliable results.
Page 14: Multiplexer
1.1 x the highest rated mains voltage is applied between the applied part and earth. Electrical Safety The electrical safety of the PTU™ has been a major consideration during design of the system hardware. The design includes capacitance coupling Copyright © 2001-2010 Articulate Instruments Ltd...
Page 15: On-Site Calibration Check
Connect an EPG palate to the system that is known to be fully functioning. Switch on the PTU™ system and have the wearer of the palate press their tongue firmly against the palate until all the contacts are ON. If any of the contacts flicker then threshold adjustment may be required.
Page 16: Epg Palate Assembly
Manual for PTU System. Document No. PTUManual_1.10 EPG Palate Assembly Double sided 31 x 2 printed circuit gold plated connector which plugs into EPG3 multiplexer. Acrylic upper denture plate fitted with 62 silver contacts wired to an external cable harness The essential component of the EPG system is an artificial palate custom built to fit the subject’s mouth.
Page 17: Preparation For Use Of Epg Palate
Manual for PTU System. Document No. PTUManual_1.10 The contacts themselves are thin silver discs, 1.4mm in diameter, each connected to a 46cm length of 41 s.w.g. enamelled copper wire. The bundles of wires are brought to the posterior corner of the palate, usually behind the wisdom teeth (in adults) and are fed out of the mouth via the buccal surfaces of the maxillary dentition.
Page 18: Wiring Connections For The Epg Palate
Manual for PTU System. Document No. PTUManual_1.10 not in use. Try not to subject the wires to any undue tension, or coil them excessively. Wiring Connections for the EPG Palate Figure below shows the correspondence between the contacts and the actual contacts on the connector plug.
Page 19: Manufacturers Of Epg Palates
Figure 6 a) “Reading” palate made from acrylic resin and hand soldered wires. b) “Articulate” palate made from pre-formed flexible circuit and pressure formed acrylic sheet. Both palates are compatible with the PTU and WinEPG. Plaster models (see figure 5) should be packaged securely and sent to the palate manufacturer.
Page 20: Troubleshooting
Use the threshold adjustment screwdriver to turn the threshold adjustment screw by a couple of turns in one direction and switch on the PTU to see if the battery indicator has moved. If not, then repeat the procedure, turning the screw in the other direction.
Page 21: Contact
Manual for PTU System. Document No. PTUManual_1.10 Contact If you are experiencing problems with the hardware or software which are not covered in this manual, you can contact Alan Wrench Articulate Instruments Ltd Queen Margaret Campus Queen Margaret University Drive...