Altimeter

More
24 Oct 2012 00:51 #23755 by pete kelly
pete kelly replied the topic: altimeter
Hi Brad
Lots of info BUT my Duesenberg altimeter is compensated for temperature???????????????????????

Please Log in or Create an account to join the conversation.

  • silverghost
  • silverghost's Avatar
  • Offline
  • Frequent Forum Contributor
  • Frequent Forum Contributor
More
24 Oct 2012 02:32 #23758 by silverghost
silverghost replied the topic:
In that case that is where Philipp's extra bi-metalic temp compensation sensor element comes into play to keep the high accuracy of this high quality Altimeter.
The bimetalic temp element only helps overcome the very small inaccuracy caused by temperature expansions & contractions of the Altimeter's metal parts.
The Barometric "Can" capsule sensor is still the main pressure sensor element here.
Most lower quality Atimeters, & Barometers for that matter, do not have this extra temperature compensation feature.

note:
I stand corrected ~
I have slightly edited my prior first post here above to reflect this~~~
It would appear that both Philipp, & I, were only partially correct. <!-- s;-) --><img src="{SMILIES_PATH}/icon_wink.gif" alt=";-)" title="Wink" /><!-- s;-) -->

We all continue to learn everyday from great auto forums like this.

This email address is being protected from spambots. You need JavaScript enabled to view it. BRAD HUNTER Huntingdon Valley Pa/Ocean City NJ 215 947 4676 Engineer & RE Developer Brass & Classic Auto, Antique Boat, Mechanical Automatic Music Machine, & Jukebox Collector

Please Log in or Create an account to join the conversation.

  • xjn001
  • xjn001's Avatar Topic Author
  • Offline
  • ACD Club Member
  • ACD Club Member
More
24 Oct 2012 07:59 #23762 by xjn001
xjn001 replied the topic: Use of this altimeter
On the altimeter that I have the outer ring turns and moves the scale with the altitude in feet. Is there a certain point to set this? Does the ring move by itself also? I have not taken the altimeter any where in distance from my home so the change in altitude might not show. The barmetric needle moves with the change in my local weather. I wanted to know how to use this gauge in actual practice. I guess I need step by step instructions to use this gauge, Thanks for any answers , also for the details on the inner workings of this altimeter.

Please Log in or Create an account to join the conversation.

  • silverghost
  • silverghost's Avatar
  • Offline
  • Frequent Forum Contributor
  • Frequent Forum Contributor
More
24 Oct 2012 14:52 #23763 by silverghost
silverghost replied the topic:
I believe that before starting your auto road trip you must know your current altitude reading at your starting point to properly zero calibrate your altimeter.
In my case my home's known altitude, just outside of Philadelphia, is 210 feet at my auto's dashboard sitting in my driveway.
You must now turn the outer altitude dial ring, to match the known starting altitude for your starting location, to mate it up to the gauge's current indicated weather Barometer pressure needle reading.
This outer ring is only used to manually calibrate your Auto Altimeter~~~It does Not move on it's own.
In my case I would set the 210 foot outer ring's altitude setting to "Zero" it with the gauge's current indiecated weather Barometer pointer needle.
Then you/I should be good to travel and get fairly accurate altitude readings. ~~~
As we then go up, or down, in altitude the gauge's pointer should point to the proper current altitude as we travel.
All this assumes that your barometric weather pressure reading does not change very much, if at all, during your entire day's trip.

Also usually hidden on the meter's back there is a small calibrating screw that is used to accurately adjust the current Barometer's weather pressure reading at your location..
You need to get this from our local weather station forcast on radio, tv, or another known accurate barometer.
Once this function is first properly calibrated~~ this setting is usually good for many decades. You only need to accurately properly calibrate the Barometer needle setting once.
Not for every trip.
It will usually always remain accurate from this point on.

I do hope this helps answer your Auto Altimeter/Brometer operation question ?

Now~~~
Who here on the ACD forum knows how to change your engine's carb fuel/air mixture settings as you travel higher, or lower, in altitude using this dash mounted Auto Altimeter ?

This email address is being protected from spambots. You need JavaScript enabled to view it. BRAD HUNTER Huntingdon Valley Pa/Ocean City NJ 215 947 4676 Engineer & RE Developer Brass & Classic Auto, Antique Boat, Mechanical Automatic Music Machine, & Jukebox Collector

Please Log in or Create an account to join the conversation.

  • xjn001
  • xjn001's Avatar Topic Author
  • Offline
  • ACD Club Member
  • ACD Club Member
More
24 Oct 2012 17:06 #23768 by xjn001
xjn001 replied the topic: Thanks
Thanks for your information! This is part of the ACD I really like!

Please Log in or Create an account to join the conversation.

  • silverghost
  • silverghost's Avatar
  • Offline
  • Frequent Forum Contributor
  • Frequent Forum Contributor
More
25 Oct 2012 22:47 #23779 by silverghost
silverghost replied the topic:
A great way to find you home's accurate starting altitude, along with also being a great way of calibrating your vintage mechanical dash mounted Barometer/Auto Altimeter, is to buy a very inexpensive hand-heald portable Hiker/Camper stye GPS unit as these units all now contain very accurate altitude digital read-outs.
Most can be bought today for between $150. and $300. locally, or on-line. They are also, very easy to use.

This email address is being protected from spambots. You need JavaScript enabled to view it. BRAD HUNTER Huntingdon Valley Pa/Ocean City NJ 215 947 4676 Engineer & RE Developer Brass & Classic Auto, Antique Boat, Mechanical Automatic Music Machine, & Jukebox Collector

Please Log in or Create an account to join the conversation.

Time to create page: 0.090 seconds
Powered by Kunena Forum