Geokon GK-401 Instruction Manual Download Page 4 | Manualshive

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Summary of Contents for GK-401

Page 1: ... 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 1987 1995 2000 2003 by Geokon Inc Doc Rev D 11 03 Instruction Manual Model GK 401 Vibrating Wire Readout ...

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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...

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Page 5: ...ION 4 APPENDIX A GK 401 SPECIFICATIONS 5 APPENDIX B CONNECTOR PINOUTS 6 APPENDIX C BATTERY PACK REPLACEMENT INSTRUCTIONS 7 APPENDIX D THERMISTOR LINEARIZATION 8 APPENDIX E READING OTHER MANUFACTURERS SENSORS 9 TABLES TABLE 1 GK 401 DISPLAY POSITION VS GEOKON MODEL NUMBER 2 TABLE 2 THERMISTOR RESISTANCE VS TEMPERATURE 8 TABLE 3 VIBRATING WIRE LENGTH VS FREQUENCY RANGE 9 ...

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Page 7: ...se of varying frequency is generated by the Readout Box and is applied to an electromagnetic coil assembly which is located close to the sensing wire When a frequency corresponding to that of the wire is generated the wire is plucked and vibrates at that frequency The wire continues to vibrate after the pluck ends and a signal primarily the resonant frequency is induced in the coil assembly and tr...

Page 8: ...62 D 4200 µstrain 450 1200 Hz 3 304 E 4100 µstrain 1500 3500 Hz 0 391 F 4300EX f2 10 3 digits 2500 6000 Hz 1 000 Notes General position for all gages possibility of harmonics in 4000 and 4200 gages at very low strain levels The period readings can be very useful for greater resolution of strain measurements Also measurements as low as 0 1 µstrain can be made see individual manuals Factor multiplie...

Page 9: ...be limited to temperature barometric pressure weather conditions water levels fill levels nearby construction activity etc Initial readings properly obtained are the baseline for all further measurements 2 Always obtain stable readings if a reading fluctuates be sure to note it 3 Compare current readings with previous readings while at the site numbers sometimes get transposed in notebooks 4 Use p...

Page 10: ...e replaced Battery packs are available from Geokon or a battery can be purchased locally see Appendix A for battery specifications and installed by the user see Appendix D for battery replacement instructions In cases where the battery will no longer operate in the field Geokon should be contacted for remedial measures 4 2 Readout System If the readout system fails to operate properly and the caus...

Page 11: ...r 80C85 CPU operating 3 072 MHz 256 Bytes SRAM 2048 Bytes EPROM Oscillator Frequency 6 144 MHz Display 5 digit LCD 7 high Battery 1 12 volt Panasonic lead acid LC SD122EU Battery Capacity 2 0 Amp Hour Operating Current 110 mA Operating Time minimum 20 hours 60 F Quiescent Current 20 µA Input Connector Gage Lemo FGG 1K 303 CNAC470 Input Connector Charger Lemo FGG 0K 303 CNAC37 Dimensions 6 4 8 165 ...

Page 12: ...ad Old Style Gage Connector 6 pin Lemo ERA 1E 306 CNL Pin Description To 1 Ground Green Clip Lead 2 No Connection NA 3 Gage Positive Red Clip Lead 4 No Connection NA 5 Gage Negative Black Clip Lead 6 No Connection NA Charger Connector Pin Description To 1 Charger Negative Charger Black Lead 2 No Connection NA 3 Charger Positive Charger Striped Lead ...

Page 13: ...k from the box it is a tight fit 5 If a new pack has been supplied connect the leads to the readout assembly and reverse the above steps If just the battery has been purchased the old battery must be removed from the pack and the new one wired in the same manner and glued into the pack before putting the pack into the case RTV holds it in place very nicely NOTE The only screws that should be remov...

Page 14: ...8 120 94 48K 39 9310 1 1535 41 364 9 81 113 8 121 88 46K 38 8851 2 1475 42 353 4 82 110 8 122 82 87K 37 8417 3 1418 43 342 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 32 6576 8 1167 48 292 4 88 94 9 128 56 51K 31 6265 9 1123 49 283 5 89 92 5 129 53...

Page 15: ...ad them Gage factors need to be known in order to convert readings to engineering units The readings can be taken in the period mode Position A and conversions to strain pressure etc can be made using the manufacturers factors supplied with the gages The table below lists approximate operating frequency ranges for different wire lengths for reference Wire Length Frequency Range 1 2500 5000 Hz 2 12...

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