CGEO INTERNATIONAL LIMITED
Model CGEO-CR
Vibrating Wire Crackmeter
Installation Manual
Страница 1: ...CGEO INTERNATIONAL LIMITED Model CGEO CR Vibrating Wire Crackmeter Installation Manual...
Страница 2: ...ors 5 2 2 3 Installation using Machine Bolt Expansion Anchors 6 2 3 Cable Installation 7 2 4 Electrical Noise 7 2 5 Lightning Protection 7 3 TAKING READINGS 8 3 1 Operation of the CGEO PR VW Readout B...
Страница 3: ...ibrating wire element The tension in the wire is directly proportional to the extension hence the opening of the joint can be determined very accurately by measuring the strain change with the vibrati...
Страница 4: ...rts upon requirement 75 mm 10mm Thread Figure 3 Standard Grouting Anchor Rod When setting the gage position using a portable readout see section 3 use the ranges in Table 2 to determine the proper pos...
Страница 5: ...e reading with a portable readout Use Table 2 or the readings on the calibration sheet to check the position Installation complete Note Under normal circumstance the installation of transducer itself...
Страница 6: ...tion complete 2 2 3 Installation using Machine Bolt Expansion Anchors The Bolt Expansion Anchor is needed to customize applied to quick installation or unable to install groutable anchor The user self...
Страница 7: ...tection The Vibrating Wire Crackmeter unlike numerous other types of instrumentation available from CGEO do not have any integral lightning protection components i e transzorbs or plasma surge arresto...
Страница 8: ...t is in digits 2 Turn the unit on and a reading will appear in the front display window The last digit may change one or two digits while reading Record the value displayed If no reading displays or t...
Страница 9: ...lation To convert digits to deformation the following equation applies Duncorrected R1 R0 G Equation 2 Deformation Calculation Where R1 is the current reading R0 is the initial reading usually obtaine...
Страница 10: ...m Digit mm Polynomial Gage Factors A 0 000000026645441378193 B 0 0094917094213891 C 23 33732890100 Thermal Factor K 0 00853859 mm R0 Original Reading T0 Original Tempera Hereinafter Blank Figure 8 Typ...
Страница 11: ...hese conditions should always be observed and recorded Seemingly minor effects may have a real influence on the behavior of the structure being monitored and may give an early indication of potential...
Страница 12: ...e cable cut or crushed This can be checked with an ohmmeter Nominal resistance between the two transducer leads usually red and black leads is 180 10 Remember to add cable resistance when checking 22...
Страница 13: ...342 2 83 107 9 123 77 66K 36 8006 4 1363 44 331 5 84 105 2 124 72 81K 35 7618 5 1310 45 321 2 85 102 5 125 68 30K 34 7252 6 1260 46 311 3 86 99 9 126 64 09K 33 6905 7 1212 47 301 7 87 97 3 127 60 17K...
