4.0 Operating Instructions 



These operating instructions are intended as a guide to 

 the use of the Magnograph , It is aimed at familiarizing 

 users with the controls and procedures that will generally 

 be followed during a test. Users are encouraged to im- 

 provise and should contact Heath & Sherwood (1964) Limited 

 if there are any questions on application. 



4.1 Transporting, Handling and Charging 



The plywood containers used to ship the instrument are 

 designed to provide protection for it. They should be 

 used when the instrument is being transported over long 

 distances, shipped by air or when it will be subjected to 

 rough handling. The instrument should be considered as 

 sensitive electronic equipment and handled accordingly 

 during testing and transportation. 



On receipt of the equipment it should be charged for 14 

 hours . This should also be done after 8 hours continuous 

 use or when the battery indicator shows a low battery 

 condition, (see section 4.2) 



The battery charger has been designed to 'trickle charge' 

 the batteries and will not over charge them. For further 

 information on battery care, refer to section 5. of this 

 manual . 



Before charging is started the user should ensure that the 

 Electronic Control and Recording sections have been set to 

 the AC voltage that will be used. The AC voltage used to 

 charge the instrument is switch selectable by toggle 

 switches on the Electronic Control and Recording Section 

 chassis. Units will be shipped set for the AC voltage 

 requested by the customer. 



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