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Fischer Instruments 1694R-22 8" Mahogany Wood and
Brass Barometer with Temperature & Humidity User
Table of Contents
1.
Introduction ..................................................................................................................................... 2
2.
Care and Cleaning ........................................................................................................................... 2
3.
Barometer Operation ....................................................................................................................... 2
4.1 How the aneroid barometer works ................................................................................................ 2
4.2
Reading the barometer............................................................................................................ 3
4.3
Absolute vs. Relative Pressure ............................................................................................... 3
4.4
Barometer Calibration ............................................................................................................ 4
4.
Thermo-hygrometer Operation ....................................................................................................... 4
5.1
How the hygrometer works .................................................................................................... 4
5.2 Hygrometer Accuracy ................................................................................................................... 4
5.3 Dial Thermometer ......................................................................................................................... 5
5.
Warranty Information ...................................................................................................................... 5
6.
Liability Disclaimer ........................................................................................................................ 5
Version 1.0
Manual
©Copyright 2015, Ambient LLC. All Rights Reserved.
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Summary of Contents for Ambient Weather Fischer Instruments 1694R-22
- Page 1 Fischer Instruments 1694R-22 8" Mahogany Wood and Brass Barometer with Temperature & Humidity User Manual Table of Contents Introduction ............................. 2 Care and Cleaning ........................... 2 Barometer Operation ........................2 4.1 How the aneroid barometer works ....................2 Reading the barometer......................3 Absolute vs.
- Page 2 1. Introduction Thank you for your purchase of the Fischer Instruments 1694R-22 8" Mahogany Wood and Brass Barometer with Temperature & Humidity. The following is a guide for preparation, care and operation of your weather instrument. Note: Some of the images are generic and may not match your exact model.
- Page 3 (cell) is made from an alloy of beryllium and copper. The evacuated capsule is prevented from collapsing by a strong spring. Small changes in external air pressure cause the cell to expand or contract. This expansion and contraction drives mechanical levers such that the tiny movements of the capsule are amplified and displayed on the face of the aneroid barometer.
- Page 4 4.4 Barometer Calibration Your barometer can not be pre-calibrated at the factory for your altitude, so you must calibrate the barometer for your specific location. To determine the relative pressure for your location, locate an official reporting station near you (the internet is the best source for real time barometer conditions, such as Weather.com or Wunderground.com), and set your weather station to match the official reporting station.
- Page 5 variations. 5.3 Dial Thermometer The dial thermometer uses a bimetallic strip wrapped into a coil. One end of the coil is fixed to the housing of the device and the other drives an indicating needle. The principle behind a bimetallic strip thermometer relies on the fact that different metals expand at different rates as they warm up.
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