Page 1: ...eans without the written consent of Geokon Inc The information contained herein is believed to be accurate and reliable However Geokon Inc assumes no responsibility for errors omissions or misinterpretation The information herein is subject to change without notification Copyright 2010 by Geokon Inc Doc Initial 9 10 ...
Page 2: ......
Page 3: ...re are no warranties except as stated herein There are no other warranties expressed or implied including but not limited to the implied warranties of merchantability and of fitness for a particular purpose Geokon Inc is not responsible for any damages or losses caused to other equipment whether direct indirect incidental special or consequential which the purchaser may experience as a result of t...
Page 4: ......
Page 5: ... INTRODUCTION 2 2 1 DESCRIPTION 2 3 INSTALLATION 2 4 TAKING READINGS 3 5 DATA RECORDING AND REDUCTION 4 EXAMPLE OF READINGS FROM A VERTICAL TILTPLATE 4 EXAMPLE OF READINGS TAKEN FROM A HORIZONTAL TILTPLATE 4 6 TROUBLESHOOTING 6 FIGURE 1 MEASUREMENTS IN THE VERTICAL PLANE 7 FIGURE 2 MEASUREMENTS IN THE HORIZONTAL PLANE 9 FIGURE 3 TILTMETER DATA SHEET 9 ...
Page 6: ...e Temperature Range Operating 0 to 50 C Temperature Range Storage 25 to 70 C Shock Survival 20 000g Dimensions Sensor 159 x 89 x 143mm Weight 6 5Kg including case Connector Lemo ERA 3E30CNL Notes 1 Depends on readout equipment For best results requires a 4 digit digital voltmeter Averaging will yield resolution on the order of 2 arc seconds 2 Based upon the use of a second order polynomial 3 Volta...
Page 7: ...t box set to a gage factor of approx 0 62 the exact gage factor is shown on the calibration sheet the display will be 20 000 sin such that at 15 the readout box will display 5176 make sure that in the Configure Probe screen the units are set to 2 0 sin and not 2 5 sin 2 5 sin is reserved for Sinco type sensors with an output of 25 000sin and the Gage Factor is set to the figure shown on the calibr...
Page 8: ...second reading is the reverse 180 of the first reading This procedure eliminates any zero offset in the sensor See Figure 1 for the positioning of the bars relative to the pegs When taking readings in the horizontal plane the tilt can be measured in two orthogonal directions First hold the end of the tiltmeter over peg 1 so that the long bar on the underside of the tiltmeter lies to the left of pe...
Page 9: ...123 would be 123 The difference column is the algebraic difference between the readings i e Peg 1 Peg 3 Example of readings from a vertical tiltplate Peg 1 reading 82 and Peg 3 reading 99 DIFF 82 99 181 The conversion of this difference to degrees of angle is done as follows Reading with either the Geokon GK601 or GK 603 readouts degrees sine 1 x 10 4 DIFF 4 The tilt can be expressed also as a til...
Page 10: ... Assuming that the present example is from a Geokon metric tiltmeter The tilt in the Peg 1 direction is sin 1 x 10 4 0 148 2 58mm m 103 The tilt in the Peg 4 direction is sin 1 x 10 4 0 106 1 85mm m 4 74 4 These two tilts can be combined to give the maximum resultant tilt and its direction This is done by first calculating the angle of the combined or resultant tilt from the formula Where θ1 The t...
Page 11: ...gs 1 and 3 offset is 25 78 53 2 26 5 from Pegs 2 and 4 offset is 63 11 52 2 26 0 v The difference of 1 digit is due to the normal lack of precision inherent in the measurement This tiltmeter offset should remain constant 6 Troubleshooting ________________________________________________ The main concerns of tiltmeter surveys are the measurement of change in magnitude and direction of rotational mo...
Page 12: ...7 Figure 1 Measurements in the Vertical Plane Plus End Minus End 2 3 4 1 1 4 2 3 ...
Page 13: ...8 ...
Page 14: ...9 Figure 2 Measurements in the Horizontal Plane Figure 3 Tiltmeter Data Sheet ...
