I produced the electronic extensometer resistance strain principle, divided into YYU YYJ YYS series.
  Our company is the largest professional production base of electronic extensometer. It has been widely used in the system of the country, universities, research institutes, factories, laboratories. With a compact structure, easy to use, reliable and many other features. 0.5, an accuracy extensometer can be used for static and dynamic mechanical testing.
About a product
     1.YYU series axial deformation Extensometer for metals, non-metallic materials testing. Including conventional extensometer, the average strain extensometer, a special extensometer (large standard from the strand, concrete, rock, wood, etc.). Used to measure the elastic modulus E, non-proportional extension strength the provisions of the RP, the total extension strength Rt, elongation, strain hardening exponent n parameters.
     2.YYJ series of fracture mechanics and lateral strain extensometer for measuring Poisson's ratio u, the plastic strain ratio r, KIc, COD parameter.
    There used to reverse the amount of shear touch G, requiring non-than the column torsional stress tp (for example the t p0.015, t p0.3), torsional extensometer.
     3.YYS Series 0.5 high-precision the axial static, dynamic extensometer.
Second use
     Chucking: 1.YYU series extensometer with two fingers to gently pinch the two arm extensometer gauge lever arm contact, will be accompanied by the gauge film openings inserted in an arm and gauge rod between. Linked by extensometer extensometer fixed with a rubber band on the specimen. Note: blessing to be appropriate, the center line of the two knife-edge, with the specimen axis parallel pairs. After the check, remove the gauge piece, arm gauge rod between about 0.5mm pitch reserved.
2 and special precautions for the use of the the spring holding of YYU Series extensometers, please refer to.
Extensometer installed in 2.YYS series card: Attach the standard distance bolt inserted pin hole in the arm to ensure the accuracy of the gauge. The extensometers spring fixed in the sample, you can also use a rubber band clamp. Guarantee extensometer chucking correct, stable, remove the gauge bolt test.
Loaded card: 3.YYJ series extensometer clenched two arm elastomer stretch chucking in a sample of the knife-edge between. Note: Do not super-deformed, in order to avoid damage to the extensometer.
Special Note: be sure to select the proper clamping force, regardless of the use of springs or rubber bands blessing any time gripping clamp method requires two knife-edge parallel to the centerline of the specimen axis alignment. The clamping state of the spring or rubber band, can all be adjusted.
 
Three technical parameters
     1. Strain gauge resistance: 350Ω
     2. For bridge voltage value: ≤ 6V (DC, AC can be)
     3. Output sensitivity: about 2mv / v.
     4. The extensometer gauge distance: YYU Series 20 to 200mm; the YYJ series 5 ~~ 25mm.
     5. maximum deformation the amount: YYU Series 25mm; YYJ Series 4mm.
     6. output terminals: Quad-core or five-pin plug.
    Generic parameters, if users have special requirements, according to the needs of specially crafted. Statement at the time of ordering.
Four Troubleshooting
     No signal: signal group and bridge resistance of the pressure group were measured with a multimeter resistance profile approximately 350 measuring pressure to end the resistance of any signal the end of any bridge, about 280 such as inconsistent, open joint checking whether disconnection or Weld.
     Signal fluctuations: With Multimeter block (20m) to measure the resistance between any end extensometer shell should not be short-circuited.
     Poor reproducibility: Check the fastening screws are loose, the blade wear.
     Zero: Check gauge the appropriateness of the incision is loose.
    If they can not be ruled out, please contact us, do not disassemble. Extensometer damage caused by its quality, free one-year warranty. Improper use or external damage repair charge.
Five output wiring
Bridge connection output signal of the signal (green) + the bridge pressure (red) + (White) - (yellow) bridge, wiring colors: pressure -
  Generally provide four core or USB plug, also connect five core nine-pin plug or provided by users plug wiring supplier according to user requirements.
The four-pin connector wiring diagram: five-pin connector wiring diagram:
 
 
1 (green) signal + 2 (red) bridge pressure + 1 signal + 2. Signals -
3 (white) signal - 4 (yellow) bridge pressure - 3 bridge pressure - 4. The bridge voltage + 5. Empty