WATERPROOF TEST METHOD AND DEVICE FOR SURVEYING INSTRUMENT

PROBLEM TO BE SOLVED: To execute quick and simple waterproof test by applying micro- differential pressure to the internal space of a tested machine by an air pump, and then measuring the change of the pressure with the passage of time by a micro-differential pressure gauge. SOLUTION: A tested machi...

Full description

Saved in:
Bibliographic Details
Main Authors NAKAMURA SATOSHI, MINOBE SATOSHI
Format Patent
LanguageEnglish
Published 22.01.1999
Edition6
Subjects
GYROSCOPIC INSTRUMENTS
MEASURING
MEASURING DISTANCES, LEVELS OR BEARINGS
NAVIGATION
PHOTOGRAMMETRY OR VIDEOGRAMMETRY
PHYSICS
SURVEYING
TESTING
Online AccessGet full text

Cover

More Information
Summary:PROBLEM TO BE SOLVED: To execute quick and simple waterproof test by applying micro- differential pressure to the internal space of a tested machine by an air pump, and then measuring the change of the pressure with the passage of time by a micro-differential pressure gauge. SOLUTION: A tested machine 30 having a test connector is connected to a test pipe 120. Next a valve 50 and a stop valve 60 are opened to apply micro- differential pressure to the machine 30 by an air pump 10. The micro-differential pressure is regulated by a pressure regulator 40. When designated micro- differential pressure is obtained, the stop valve 60 is closed, and simultaneously the aged change of the micro-differential pressure by a micro-differential pressure is measured visually or by a recorder or the like. Thus the waterproof test time can be greatly reduced and the need of post-processing is eliminated.
Bibliography:Application Number: JP19970167379