FR2336658A1 - Magnetic thickness gauges calibration - uses nickel test plate of known thickness providing calibration reading for permanent magnet probe - Google Patents

Magnetic thickness gauges calibration - uses nickel test plate of known thickness providing calibration reading for permanent magnet probe

Info

Publication number
FR2336658A1
FR2336658A1 FR7639165A FR7639165A FR2336658A1 FR 2336658 A1 FR2336658 A1 FR 2336658A1 FR 7639165 A FR7639165 A FR 7639165A FR 7639165 A FR7639165 A FR 7639165A FR 2336658 A1 FR2336658 A1 FR 2336658A1
Authority
FR
France
Prior art keywords
calibration
permanent magnet
thickness
test plate
plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7639165A
Other languages
French (fr)
Other versions
FR2336658B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NIX STEINGROEVE ELEKTRO PHYSIK
Original Assignee
NIX STEINGROEVE ELEKTRO PHYSIK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NIX STEINGROEVE ELEKTRO PHYSIK filed Critical NIX STEINGROEVE ELEKTRO PHYSIK
Publication of FR2336658A1 publication Critical patent/FR2336658A1/en
Application granted granted Critical
Publication of FR2336658B1 publication Critical patent/FR2336658B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
    • G01B7/10—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance
    • G01B7/105—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance for measuring thickness of coating

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

The thickness gauge test apparatus is suitable for use with instruments designed to measure coatings on ferromagnetic substrates. The permanent magnet probe of the gauge to be calibrated (5) is first fully magnetised. The spring-loaded magnet is then drawn across the surface of a precision test surface of known properties (6). A plate of pure nickel with a magnetic saturation Js=0,62 T is used. For an instrument with a thickness measuring range of 0...1000 mum, a nickel test plate of 1 mm thickness provides a calibration point equivalent to 65 mum and a plate 0.1 mm thick an equivalent of 900 mum. The magnetic probe of the instrument is now progressively demagnetised until the pointer reading reduces from infinity (8) to the calibration point (b) related to the nickel test plate in use. At this point the instrument is calibrated.
FR7639165A 1975-12-27 1976-12-27 Magnetic thickness gauges calibration - uses nickel test plate of known thickness providing calibration reading for permanent magnet probe Granted FR2336658A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752558897 DE2558897C3 (en) 1975-12-27 1975-12-27 Test plate for calibrating coating thickness measuring devices

Publications (2)

Publication Number Publication Date
FR2336658A1 true FR2336658A1 (en) 1977-07-22
FR2336658B1 FR2336658B1 (en) 1982-02-12

Family

ID=5965780

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7639165A Granted FR2336658A1 (en) 1975-12-27 1976-12-27 Magnetic thickness gauges calibration - uses nickel test plate of known thickness providing calibration reading for permanent magnet probe

Country Status (2)

Country Link
DE (1) DE2558897C3 (en)
FR (1) FR2336658A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140039830A1 (en) * 2012-08-06 2014-02-06 Hon Hai Precision Industry Co., Ltd. Test device to measure coating thickness and test system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2811368A1 (en) * 1978-03-16 1979-09-27 Felix Von Rueling Measurement value indication method - displays sheet thicknesses using three LEDs showing three comparator states
US4567436A (en) * 1982-01-21 1986-01-28 Linda Koch Magnetic thickness gauge with adjustable probe
DE19918064C2 (en) * 1999-04-21 2003-09-18 Norbert Nix Layer thickness measuring device with automated zeroing and / or calibration
RU2532858C2 (en) * 2013-01-28 2014-11-10 Закрытое Акционерное Общество "КОНСТАНТА" Measurement method of thickness of non-ferromagnetic electrically conducting coating of steel

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3077858A (en) * 1960-03-17 1963-02-19 Gen Electric Canada Apparatus for controlling and measuring the thickness of thin electrically conductive films
US3407352A (en) * 1965-06-07 1968-10-22 Western Electric Co Method of and apparatus for monitoring the thickness of a non-conductive coating on a conductive base
US3454874A (en) * 1962-10-11 1969-07-08 British Aluminium Co Ltd Instrument for measuring the thickness of a non-conducting film on a metal base and for measuring the resistivity of a metal sample

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3077858A (en) * 1960-03-17 1963-02-19 Gen Electric Canada Apparatus for controlling and measuring the thickness of thin electrically conductive films
US3454874A (en) * 1962-10-11 1969-07-08 British Aluminium Co Ltd Instrument for measuring the thickness of a non-conducting film on a metal base and for measuring the resistivity of a metal sample
US3407352A (en) * 1965-06-07 1968-10-22 Western Electric Co Method of and apparatus for monitoring the thickness of a non-conductive coating on a conductive base

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140039830A1 (en) * 2012-08-06 2014-02-06 Hon Hai Precision Industry Co., Ltd. Test device to measure coating thickness and test system

Also Published As

Publication number Publication date
DE2558897A1 (en) 1977-07-07
FR2336658B1 (en) 1982-02-12
DE2558897C3 (en) 1979-02-15
DE2558897B2 (en) 1978-06-15

Similar Documents

Publication Publication Date Title
FR2382688B1 (en)
US2862178A (en) Test instrument calibrating apparatus
US2384529A (en) Magnetic instrument
FR2336658A1 (en) Magnetic thickness gauges calibration - uses nickel test plate of known thickness providing calibration reading for permanent magnet probe
CA1270303C (en) Probe for composite analyzer tester
GB575150A (en) Improvements in or relating to devices for testing the thickness of coatings on ferro-magnetic materials
US4433290A (en) Magnetic coating thickness comparator having parallel magnetic rods with nonmagnetic slide indicators
GB666127A (en) Electromagnetic gauge
JPS56104201A (en) Vernier scale tape measure
GB822210A (en) Improvements in or relating to instruments for making magnetic measurements
GB1293821A (en) A device for measuring ferrite content
Lilley et al. Performance tests of a set of Gough-Reitzel magnetic variometers
JPS57128808A (en) Distance measuring equipment
JPS62106382A (en) Apparatus for measuring magnetostriction constant of magnetic membrane
SU906231A1 (en) Device for measuring linear dimensions
JPS5666702A (en) Measuring device of extent of eccentricity for fine hole drilled at center of end face of cylindrical work
MELGUI et al. The IMA-4 impulse magnetic analyzer
Craik The measurement of magnetization using Hall probes
SU834636A1 (en) Method of measuring thin ferromagnetic specimen saturation magnetization flux
SU1633266A2 (en) Device for measuring the thickness of protestive coatings
SU828140A1 (en) Permeameter
SU1534293A1 (en) Method of measuring thickness of non-ferromagnetic coatings on ferromagnetic base
JPS56112602A (en) Measuring device for thickness of nonmagnetic thin metal plate
GB1329155A (en) Thickness measuring instruments
SU763771A1 (en) Calibrated specimen for residual magnetization meter

Legal Events

Date Code Title Description
ST Notification of lapse