Casella-cel Fortin barometer Manuel d'utilisateur

HB31211USER MANUALCOPYRIGHTThe copyright in this document which contains information is vested inCASELLA LIMITED. The contents of this

HB312110MAINTENANCENo attention should be necessary to a barometer except to dust it and to keep theadjusting screw clean and lightly oiled. The thre

HB312111SPECIFICATIONEffective range: Ordinary Range model900 to 1060mb670 to 800mmHg26.4 to 31.2inHgAltitude up to: 450mVernier reads to: 0.1mb, 0.05

HB31212CONTENTS PageINTRODUCTION... 3PRINCIPL

HB31213INTRODUCTIONThe Fortin barometer is the most widely used type and can be found in manyindustrial laboratories, workshops, classrooms and meteor

HB31214INITIAL SET UPCHOOSING A SUITABLE LOCATIONThe room in which the barometer is due to hang should: -• Not be unduly warm.• Not be subject to va

HB31215MOUNTING THE INSTRUMENTHaving chosen the best possible position for the barometer the glass windowedcase should be securely fixed to

HB31216If the readings are to be corrected to mean sea level, the height of the cisternshould be accurately found and recorded as

HB31217READING THE BAROMETERThe thermometer should always be read first since the presence of the observerwill cause the thermometer to al

HB31218Where to view the vernier from

HB31219The height of the mercury column can now be read on the scale using the vernier.The diagram below gives an example.For mmHg the reading is 1000