PCB Test & Measurement Seite 41

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For Additional Specification Information Visit www pcb com PCB PIEZOTRONICS INC 716 684 0001 Fax 716 685 3886 39 Adhesives Many adhesives have been successfully used for securing mounting bases to test objects These include epoxies waxes glues gels and dental cement Some provide more permanent attachment than others Stiffer adhesives provide better transmission of high frequencies Adhesives should be selected which perform adequately for the required application and environmental conditions PCB offers petro wax and quick bonding gel How do I remove an adhesive mount sensor A debonder should always be used to avoid sensor damage To avoid damaging the accelerometer a debonding agent must be applied to the adhesive prior to sensor removal With so many adhesives in use glues dental cement epoxies etc there is no universal debonder available The debonder for the Loctite 454 adhesive that PCB offers is Acetone If you are using anything other than Loctite 454 you will have to check with the individual manufacturer for the debonding recommendation The debonding agent must be allowed to penetrate the surface in order to properly react with the adhesive so it is advisable to wait a few minutes after applying before removing the sensor Tools Removal tools help avoid sensor damage and assist with the removal of adhesively mounted teardrop style accelerometers The shear force applied snaps the bond of most glues and epoxies Probe tips install onto accelerometers to enable their use as handheld vibration sensors This technique is useful if installation space is severely limited or for determining installation locations where vibration is most prevalent Adhesives Model Number Description Quantity Provided 080A24 Petro Wax 4 Squares 1 x 1 x 0 25 in ea 080A109 Petro Wax 1 Squares 1 x 1 x 0 25 in 080A47 Petro Wax 175 gm Box 080A90 Quick Bonding Gel 1 Tube 0 10 oz 3 gm Model 080A90 Quick Bonding Gel Model 080A109 Petro Wax Tools Model Number Applicable Sensor s 039A27 352A21 352C22 357A09 357C10 352A25 039A26 352C23 352A73 039A28 352A24 357A07 039A29 357A08 357A19 039A07 740B02 039A31 352A56 039A32 352A71 352A72 039A08 0 4 in 10 2 mm Cube Shaped Accelerometers 039A09 0 45 in 11 4 mm Cube Shaped Accelerometers 039A10 0 55 in 14 mm Cube Shaped Accelerometers 039A12 0 8 in 20 3 mm Cube Shaped Accelerometers 039A33 0 25 in 6 3mm Cube Shaped Accelerometers Model 080A09 Probe Tip with 10 32 tapped hole Model 076A22 BNC connector tool Helps grip BNC s for connection to crowded panels Removal tool for miniature teardrop accelerometers Removal tool for cube shaped accelerometers Tipsfrom Techs Models 039A08 039A09 039A10 039A12 Models 039A27 039A26 039A28 039A29 3 T Mcatalog 2011 Seite 33 48 A4 F G500 21 04 11 09 27 Seite 39