Tapping barometers

[peterb]

The amount of vibration needed to overcome the stiction is usually quite small. To avoid damage to the pivots, try tapping the bulkhead on which the barometer is mounted, rather than tapping the instrument itself.

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[Seafort]

Does no one do digital?

Everyone loves to tap the bukkhead one. I use a digi' one that shows; now and the last 24 hour in the form of [Minus] 1, 2, 3. 6. 12, 18 and 24.

Works for me.

Dave.



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[boatless]

I've got a digital one too, but nothing happens when I tap it. What am I doing wrong?

<hr width=100% size=1>my opinion is complete rubbish, probably.

 

[Capt_Marlinspike]

Surely this is complete nonsense. The barometer is on a boat! Surely the forces imparted to the moving gubbins in the barometer when the boat falls off a wave are vastly greater than any imparted by a tap on the glass?

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[TFJ]

This might be true if you were a stinkie with all the banging and crashing about

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[Guest]

There used tio be and old joke ..... Don't tap me - I'm doing the best I can .....

I think everyone has tapped the odd one now and again. It actually comes from the older versions that the wound coil needed gentle persuasion to 'move' that micron and the tap was to do just that. Later machines shouldn't need it ....


<hr width=100% size=1>Nigel ... and of course Yahoo groups :
http://groups.yahoo.com/group/gps-navigator/

 

[alpha]

peterb has it right, tap the mounting surface not the instrument.

Regarding the 'falling off the wave' question , the mechanism will move subjected to a brief duration, high frequency, 'pulse' (eg a 'tap') but not a long duration (eg .5sec) lower frequency, 'wave' caused by the boat falling off... a wave.

My answer:

Brief the crew first. Either tap or don't, but have a standard approach - if some crew tap and others don't, you'll see odd trends.

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