YARNALL-WARING CO. ELECTRONIC SECONDARY REMOTE LIQUID LEVEL INDICATOR
Abstract
The electronic secondary remote liquid level indicator, is designed to provide remote electrical duplication of steam drum water levels as indicated by their Yarway pressurized primary indicator (remote water level indicator), and eliminates the need for extended high pressure piping runs. The secondary indicator closely resembles the primary in shape and length of scale; its pointer is positioned by a solenoid powered by an amplifier output; that output is determined by an input voltage based upon the unbalance between two movable-core transformers, one actuated by the secondary pointer, the second by the primary pointer. The secondary unit was set up with its associated primary unit, a static head applied to the primary, and both units inclined to simulate roll and pitch conditions. The secondary indicator duplicated the primary pointer positions except under extreme 30-degree inclinations. The amplifier assembly failed electrically after approximately 1000 hours operation. Being a commercial version, not shock or vibration resi tant, indicati n accuracy was affected by jarring or impact. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 18, 1961
- Accession Number
- AD0260643
Entities
People
- J. Isinger