Geokon 4675LV Скачать руководство пользователя страница 1

 

 

 

 

 

 

Instruction Manual 

Model 4675LV 

Weir Monitor 

 

 

 

 

 

 

 

 

No part of this instruction manual may be reproduced, by any means, 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 © 1991, 2004, 2006, 2011, 2012, 2013 by Geokon, Inc. 

(Doc Rev H, 6/13) 

Содержание 4675LV

Страница 1: ... 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 1991 2004 2006 2011 2012 2013 by Geokon Inc Doc Rev H 6 13 ...

Страница 2: ......

Страница 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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Страница 5: ...N OF THE GK404 READOUT BOX 5 3 3 OPERATION OF THE GK405 READOUT BOX 5 3 4 MEASURING TEMPERATURES 6 4 DATA REDUCTION 7 4 1 DETERMINATION OF WATER ELEVATION 7 4 2 CORRECTIONS FOR TEMPERATURE CHANGES 9 5 MAINTENANCE 10 5 1 MOISTURE TRAP 10 5 2 WEIGHT MAINTENANCE 10 5 3 SENSOR 11 6 TROUBLE SHOOTING 11 APPENDIX 1 THERMISTOR LINEARIZATION USING STEINHART AND HART LOG EQUATION12 ...

Страница 6: ...FIGURE 2 GK405 READOUT UNIT 6 FIGURE 3 TYPICAL CALIBRATION SHEET 8 FIGURE 4 DENSITY P OF PURE WATER AS A FUNCTION OF TEMPERATURE AND PRESSURE INTENSITY BY PERMISSION FROM FLUID MECHANICS FOR HYDRAULIC ENGINEERS BY HUNTER ROUSE COPYRIGHT 1938 MCGRAW HILL BOOK COMPANY INC 10 ...

Страница 7: ...g Well Stainless steel PVC standard stainless steel optional Cable 4 Conductor 22 gage PVC jacket Sensor Diameter 1 00 Length 8 5 1 Other ranges available on request 2 Accuracy achieved by using a polynomial expression rather than a linear coefficient 3 Using anti freeze solution can extend the range below 0 C The system requires calibration with the solution being used ...

Страница 8: ... The gage and weight assembly can now be checked out on site by connecting the sensor to the readout system and measuring the output of the sensor with the weight hanging from it in air The readings in Readout box channel B should coincide within about 200 digits of the factory reading in air shown on the calibration sheet Be sure that the sensor is held firmly and allow the system to stabilize no...

Страница 9: ...ation tool provided The Rawl plug is first placed in the hole and tapped flush with the surface Then place the installation tool inside the Rawl plug and set the anchor by means of several sharp hammer blows The PVC slotted tubing has a bottom plug at its lower end which can now be cemented in place using PVC cement It is left loose in case the PVC pipe needs to be shortened a little due to space ...

Страница 10: ...03 can store gage readings and also apply calibration factors to convert readings to engineering units ie inches or millimeters Consult the GK 403 Instruction Manual for additional information on Mode G of the Readout The following instructions will explain taking gage measurements using Mode B Connect the Readout using the flying leads or in the case of a terminal station with a connector The red...

Страница 11: ...bed in the GK404 Manual The GK 404 will continue to take measurements and display the readings until the OFF button is pushed or if enabled when the automatic Power Off timer shuts the GK 404 off The GK 404 continuously monitors the status of the 2 1 5V AA cells and when their combined voltage drops to 2V the message Batteries Low is displayed on the screen A fresh set of 1 5V AA batteries should ...

Страница 12: ...utomatically However if an ohmmeter is used 1 Connect the ohmmeter to the two thermistor leads coming from the convergence meter Since the resistance changes with temperature are so large the effect of cable resistance is usually insignificant 2 Look up the temperature for the measured resistance in Table B 1 Appendix B Alternately the temperature could be calculated using Equation B 1 Appendix B ...

Страница 13: ...x and the tip of the weir If the weir plate is graduated just record the initial water level as indicated Call this difference in elevation ΔE Then H R1 R0 G ΔE inches or mm Where H is the height of water above the tip of the weir R0 is the initial reading R1 is the subsequent reading G is the calibration factor in the height units digit shown on the calibration sheet Alternatively from the initia...

Страница 14: ...8 Figure 3 Typical Calibration Sheet ...

Страница 15: ...ections Alternatively two sensors can be used one of which is completely submerged at all times and whose output can be used to make corrections for the other sensor This technique is not fool proof either since the water may have temperature gradients which the submerged sensor may or may not intersect A temperature density curve for water is shown in Figure 1 As can be seen from the data the den...

Страница 16: ..._______________________________________________ 5 1 Moisture Trap The vibrating wire sensor has a vent tube to prevent loading on the sensor due to changes in atmosphere pressure and the moisture trap on the vent line requires periodic changing of the desiccant capsules The frequency of this is dependent on weather conditions but three to six months is a normal period 5 2 Weight Maintenance Since ...

Страница 17: ...ble resistance 22 gage copper approximately 15 Ω per 1000 feet a If the resistance is high or infinite a cut cable must be suspected b If the resistance is low or near zero a short must be suspected c If resistance s are within nominal and no readings are obtainable on any transducer the readout is suspect and the factory should be consulted d If all resistance s are within nominal and no readings...

Страница 18: ...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 10K 30 5971 10 1081 50 274 9 90 90 2 130 49 91K 29 5692 11 1040 51 266 6 91 87 9 131 46 94K 28 5...

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