GeoSIG AC-23 User Manual Download Page 1

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GeoSIG Ltd, Wiesenstrasse 39, 8952 Schlieren, Switzerland

Phone: + 41 44 810 2150, Fax: + 41 44 810 2350

User Manual

AC-23 Accelerometer

Author:

Serge Rudaz

Checked:

Markus Epp

Approved:

Johannes Grob

Distribution:

GeoSIG Ltd (1), Customer on request

Summary of Contents for AC-23

Page 1: ...Schlieren Switzerland Phone 41 44 810 2150 Fax 41 44 810 2350 info geosig com www geosig com User Manual AC 23 Accelerometer Author Serge Rudaz Checked Markus Epp Approved Johannes Grob Distribution...

Page 2: ...MAE 11 15 10 2014 Adjusted formatting of figures SER MAE 12 29 07 2015 Picture update PAT JON 13 07 05 2019 Mounting section updated VAG ALB 14 27 05 2019 P N correction on item 1 2 JOG TAB 15 20 03...

Page 3: ...TRODUCTION 7 5 2 PRINCIPLE 7 6 ELECTRICAL CONFIGURATION 8 7 OFFSET ADJUSTMENT ERROR BOOKMARK NOT DEFINED 8 MOUNTING DOWNHOLE SENSOR 10 8 1 BOREHOLE PREPARATION 10 8 2 INCLINOMETER TUBE INSTALLATION 11...

Page 4: ...zorb diodes and VDR Power supply 10 15 VDC Current drain Average 90 mA 15 VDC 2 Electrical Connector All the AC 4x accelerometers are supplied as standard with a 2 m connection cable Based on the inte...

Page 5: ...tput 47 output impedance White 2 B OUTPUT X 0 V 10 V voltage output inverted 47 output impedance Brown 3 C OUTPUT Y 0 V 10 V voltage output 47 output impedance Green 4 D OUTPUT Y 0 V 10 V voltage outp...

Page 6: ...e point levelling mechanism This may damage the sensor Figure 3 Sensor housing dimensions The accelerometer must be firmly mounted to a surface and levelled as the application requires Check to be sur...

Page 7: ...lected by the user with jumpers 4 2 Principle The accelerometer is based on a geophone mass spring system with electronic correction This type of sensors gives a very good stability in temperature and...

Page 8: ...HONE OUTPUT Feedback loop Amplifier Inverter Figure 5 TEST INPUT configuration 5 Electrical Configuration The full scale can be adjusted without gain re calibration by means of jumpers with fixed 0 1...

Page 9: ...DVM as shown on the above figure and adjust the offset potentiometers so that the DVM readings stay within the ranges indicated in the following table according to the sensor output range given in Se...

Page 10: ...it could be required to drill a higher dimension hole and to implement a 120 mm PVC casing to insure a free path when the inclinometer tube is inserted in the borehole 8 1 Borehole preparation Note Do...

Page 11: ...wing The number of sections is only an example Figure 9 Inclinometer tube installation 30 cm Inclinometer tube in 3 meters section Coupling elements fixed with pop rivets Must be fully sealed to avoid...

Page 12: ...drawing The number of sections is only an example Figure 10 Sensor Installation About 70 cm Sand 50 cm Guiding system Sensor AC 23 DH diameter 54 mm Cable Concrete sealing of sensor At least 1 meter...

Page 13: ...of 3 The functional limit for the sensor is 9 The water level in the inclinometer tube should be maximum 50 meters including fast elevation due to heavy rain It is recommended to use the optional asse...

Page 14: ...meter User Manual 11 08 2022 V17 14 15 GS_AC 23_UserManual_V17 The following elements will be inserted in the borehole Figure 12 Torpedo the sensor and its cable Figure 13 Guiding system Figure 14 Inc...

Page 15: ...ed before the insertion The engraved mark on bottom cover is showing the positive direction of X axis View for top 9 Installation Verification Please note that temperature compensation device is mount...