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HOW TO READ THIS MANUAL
Thank you for selecting the TOPCON instrument.
• Please read this Instruction manual carefully, before using this product.
• The specifications and general appearance of the instrument are subject to change without prior notice and
without obligation by TOPCON CORPORATION and may differ from those appearing in this manual.
• The content of this manual is subject to change without notice.
• Some of the diagrams shown in this manual may be simplified for easier understanding.
• Always keep this manual in a convenient location and read it when necessary.
• This manual is protected by copyright and all rights are reserved by TOPCON CORPORATION.
• Except as permitted by Copyright law, this manual may not be copied, and no part of this manual may be
reproduced in any form or by any means.
• This manual may not be modified, adapted or otherwise used for the production of derivative works.
Symbols
The following conventions are used in this manual.
: Indicates precautions and important items which should be read before operations.
: Indicates the chapter title to refer to for additional information.
: Indicates supplementary explanation.
{HOLD} etc. : Indicates keys on the operation panel.
Notes regarding manual style
• Except where stated, “DT” means DT-302/305/307/305L/307L/309F/309G/309LG in this manual.
• All other company and product names featured in this manual are trademarks or registered trademarks of
each respective organization.
This is the mark of the Japan Surveying Instruments Manufacturers Association.
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