IGNITION NOISE IN NEUTRON MOISTURE GAGES

SPARK-FIRED ENGINES WERE FOUND TO COUPLE SPURIOUS COUNTS INTO NEUTRON MOISTURE GAUGES. ELECTROMAGNETIC COUPLING TO THE CABLE CONNECTING THE PROBE UNIT AND COUNTER UNIT SEEMED TO BE THE CAUSE. PULSES WERE APPARENTLY AMPLIFIED IN THE PROBE UNIT AND DULY RECORDED IN THE COUNTING UNIT. INTERFERENCE WAS NOT NOTED IN CASES WHERE THE CABLE WAS POSITIONED NO CLOSER THAN 3 FT FROM ANY PORTION OF THE MOTOR VEHICLE. IF MOISTURE MEASUREMENTS ARE TO BE MADE IN THE VICINITY OF OPERATING SPARK-FIRED ENGINES, A TEST FOR INTERFERENCE SHOULD BE MADE. /ASCE/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/07339437
• Supplemental Notes:
  • Vol 93, No IR3, PP 147-152, 1 FIG, 3 TAB
• Authors:
  • Stone, J F
  • Barefoot, A D
  • Garton, J E
• Publication Date: 1967-9

Media Info

• Serial:
  • Journal of Irrigation and Drainage Engineering
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9437
  • Serial URL: https://ascelibrary.org/journal/jidedh

Subject/Index Terms

• TRT Terms: Electromagnetism; Ignition; Measuring instruments; Moisture meters; Neutrons; Noise; Sparks
• Subject Areas: Environment; Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00216244
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 24 1994 12:00AM