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OPERATINGAITDSERYICEMAIIUAIManualPartNo.03490-90014MicrofichePartNo. 03490-90064

M O D E3L4 9 0 A

MUtTIM ETER

The main body of this manualappliesto

SerialPrefix 1211A

Any changesmade in instrumentsmanufacturedafter this printing will be found in a "Manual Changes"supplement supplied with this manual. Be sure. to examine this supplement,if one existsfor this manual,for any changes which apply to your instrumentand recordthesechangesin the manual. Backdatinginformationfor instrumentsmanu- facturedbefore this printing will be found in SectionVIII.

CopyrightHewlett-Packafi Company 972

P.O.Box 301, l,oveland,Colorado 80537 U.S.A

Printed:APRIL 1974