MOUNTING THE INSTRUMENT
Having chosen the best possible position for the barometer the glass windowed
case should be securely fixed to the wall. The height of the case should be chosen
so that the barometer scale is 1.5 meters above floor level making reading it easier.
To ensure that the readings taken from the barometer are accurate, it should be set
as vertical as possible and freely hung from its top suspension. The board should
be fixed inside the case in such a way that it can be moved from side to side to set
it vertical. The two bottom screws can then be tightened to keep the board vertical.
When the barometer is hanging vertically, screw in the three adjusting screws so
they just touch the barometer but do not displace it. This will hold it vertical while
the adjustments are being made.