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Construction method with strain gauges FAQ

  • What kind of strain gauges and adhesives are suitable for measuring large strain?

    Post-yield strain gauges "YF, YEF series", adhered with "CN-Y" adhesive for large strain measurement.

  • What kind of strain gauges and adhesives are suitable for measuring strain in plastics?

    The strain gauges “GF series” for plastic are used. Although adhesive is mainly CN adhesive, some plastics cannot be adhered to depending on the material (difficult-to-adhere-to materials). Here, the surface treatment agent Aron Poly Primer might be able to allow adherence. (We carry this product)

  • Regarding quarter bridge 3-wire method and gauge lead wire color coding, which wire should be connected to which lead?

    See this list.

     
    Connected lead wire
    Connection
    For room temperature quarter bridge 3-wire method
    Single-element Gray-blue line Blue line to A terminal (single line), remaining gray to B and C terminals
    Multi-axial (two-element, three-element) Single-element: white-blue line
    Two-element: white-orange line
    Three-element: white-red line    		 Blue line to A terminal (single line), remaining white to B and C terminals.
    Orange line to A terminal (single line), remaining white to B and C terminals
    Red line to A terminal (single line), remaining white to B and C terminals
    For high-temperature quarter bridge 3-wire method
    FEP
    6FA♦LT
    6FAS♦LT
    6FB♦LT    		 Red, green, blue Red line to A terminal (single line), remaining green and blue to B and C terminals
    FEP
    6FC♦LT    		 Red, black, white Red line to A terminal (single line), remaining black and white to B and C terminals
    Shielded FEP wire
    6FD♦LST    		 Red (red-black-white) Red line to A terminal (single line), remaining black and white to B and C terminals
    PTFE
    4FA-♦LT    		 Red, gray, white Red line to A terminal (single line), remaining black and white to B and C terminals
    PTFE
    4FB-♦LT    		 Red, black, white Red line to A terminal (single line), remaining black and white to B and C terminals
    Other quarter bridge 3-wire method
    0.3mm2 vinyl White-red line Red line to A terminal (single line), remaining white to B and C terminals
    ø3-mm 3-conductor shielded vinyl Red, green, white Red line to A terminal (single line), remaining black and white to B and C terminals
    Cross-linked vinyl Red, green, black Red line to A terminal (single line), remaining green and black to B and C terminals
    Cross-linked polyethylene Red, black, yellow Red line to A terminal (single line), remaining black and yellow to B and C terminals
    Temperature-integrated gauge Red, white, blue Red line to A terminal (single line), white to B terminal, to C terminal; temperature measurement channel: red to B terminal, white to D terminal

  • Please describe how to measure with a chain gauge.

    A chain gauge is a gauge for measuring stress concentration with a continuous-shaped sensor. Measurement is made using the complete correction method for strain (Comet B ) installed in our strain gauges. This makes it possible to reduce the number of lead wires to half of that before (from 20 to 11).

    CCFX-b

    To measure the element No.1 gauge, connect the lead wires of ①, ②, and ③ to 1ch A-①, C-②, and 2ch C-③ on the instrument.
    From ④ to ⑩, connect sequentially to C terminals, and at ⑪, connect to 10ch A terminal.
    From 1ch to 9ch, short-circuit B-C and C-A using jumpers as shown.