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Title: Microfabricated Chip for Calibration of Field Instruments.

Abstract

Abstract not provided.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1267219
Report Number(s):
SAND2007-1430C
526815
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the IEEE Conference on Homeland Security held May 16-17, 2007 in Boston, MA.
Country of Publication:
United States
Language:
English

Citation Formats

Moorman, Matthew W, Manginell, Ronald P, Tappan, Alexander S, Robinson, Alex L., and Linker, Kevin L. Microfabricated Chip for Calibration of Field Instruments.. United States: N. p., 2007. Web.
Moorman, Matthew W, Manginell, Ronald P, Tappan, Alexander S, Robinson, Alex L., & Linker, Kevin L. Microfabricated Chip for Calibration of Field Instruments.. United States.
Moorman, Matthew W, Manginell, Ronald P, Tappan, Alexander S, Robinson, Alex L., and Linker, Kevin L. Thu . "Microfabricated Chip for Calibration of Field Instruments.". United States. doi:. https://www.osti.gov/servlets/purl/1267219.
@article{osti_1267219,
title = {Microfabricated Chip for Calibration of Field Instruments.},
author = {Moorman, Matthew W and Manginell, Ronald P and Tappan, Alexander S and Robinson, Alex L. and Linker, Kevin L.},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2007},
month = {Thu Mar 01 00:00:00 EST 2007}
}

Conference:
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  • Abstract not provided.
  • A microfabricated field calibration assembly for use in calibrating analytical instruments and sensor systems. The assembly comprises a circuit board comprising one or more resistively heatable microbridge elements, an interface device that enables addressable heating of the microbridge elements, and, in some embodiments, a means for positioning the circuit board within an inlet structure of an analytical instrument or sensor system.
  • The measurement accuracy of ion chamber survey instruments in field survey situations is affucted by both the calibration procedures and the geometric relationship between the radiation source and the chamber. The fundamentals of the calibration method used at Hanford for ion chamber instruments and the resulting capabilities of the instruments in field survey situations are described. Additional corrections to calibrated instrument results are ordinarily required when measuring small beams, radiation fields associated with large beta sources, and radiation levels where the chamber is in contact with the source. The method of determining the required corrections, and the values of themore » corcection factors are described for one widely-used CP ion chamber survey instrument. (auth)« less
  • The microfabrication of analytical instrumentation will potentially enable the laboratory to be transported to the samples rather than vice versa. Miniature chemical instrumentation can be based on conventional laboratory approaches to chemical measurement problems. Many laboratory-based procedures require sample manipulation prior to the actual measurement, and many analyses are fully automated to circumvent operator bias. Similarly, a portable instrument should have these sample preparatory steps incorporated into the design and function of the instrument. In addition, micromachined chemical instruments as opposed to single analyte chemical sensors should be able to identify and quantify all members of a desired class ofmore » compounds using a single device. The approach taken is to micromachine a channel manifold in a monolithic device that includes all desired fluid manipulation for complete chemical analysis. Chemical separation techniques including capillary electrophoresis, open channel electrochromatography and capillary electrophoresis with pre- and post-column derivatization have been demonstrated using microfabricated devices. The channel manifolds on the glass substrate are fabricated using standard photolithographic, etching and deposition techniques. Following the fabrication of the channels, a direct bonding technique is used to join the substrate and coverplate to form a network of closed channels for the experiments. Electrical control of the buffer, analyte and reagent streams makes possible the precise manipulation of the fluids within the channel manifold. The operation of these microchips consists of three elements: on-microchip chemical reactions, sample injection, and separation/detection. Each of these elements is evaluated.« less
  • An experiment known as the CALibration Demonstration EXercise (CALDEX) has tested volume, weight, and level measurement instruments in a 12,500-{ell} annular vessel. Data from this experiment were statistically analyzed in the following ways: Data from various high-precision differential pressure gauges, liquid-level determination instruments, and weight devices were analyzed and compared; Incremental inputs to the tank, determined by a high-precision balance and rotary piston meter, were compared with load cell measurements and found to agree; and Data from precision pressure gauges did not vary significantly among gauges; data from capacitive level measurement instruments did not vary either. However, data from themore » sonic probe were not consistent enough to make comparison meaningful. 3 refs., 3 figs., 3 tabs.« less