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GeoSIG Ltd, Ahornweg 5a , 5504 Othmarsingen, Switzerland 

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

[email protected],  www.geosig.com 

 

 

 

GSR-12 / 16 / 18  

AS-12 / 16  

GCR-12 / 16  

 

User Manual 

Summary of Contents for AS-12

Page 1: ...GeoSIG Ltd Ahornweg 5a 5504 Othmarsingen Switzerland Phone 41 44 810 2150 Fax 41 44 810 2350 info geosig com www geosig com GSR 12 16 18 AS 12 16 GCR 12 16 User Manual...

Page 2: ...ty scale for GSR 18 08 04 2004 Adjustments concerning the new communication programs PC 12 05 2004 Formula format of Signal Conditioning and Triggering corrected TB 10 06 2004 Preliminary formatting a...

Page 3: ...3 11 Options and Accessories 7 3 12 Storage 7 4 Installation Configuration and Operation 8 4 1 Site Selection 8 4 1 1 Environmental Considerations 8 4 1 2 Power Supply Considerations 8 4 2 Installatio...

Page 4: ...Triggering Guidelines 17 5 3 1 Threshold Trigger 17 5 3 2 STA LTA Ratio Trigger 17 5 3 2 1 Micro Event Detection 19 5 3 2 2 Local Earthquake Detection 19 5 3 2 3 Strong Motion Detection 19 5 4 Data Re...

Page 5: ...d never be removed without first contacting to GeoSIG or your local representative Before removing any of the covers always 1 Flip the main switch to OFF 2 Disconnect power supply from the POWER conne...

Page 6: ...12 16 18 GCR GCR 12 16 AS AS 12 16 CMOS Complementary Metal Oxide Semiconductor SRAM Static Random Access Memory EEPROM Electrically Erasable Programmable Read Only Memory PC Card Personal Computer Me...

Page 7: ...tal form and passes these to a pre event memory GCR has a permanent continuous recording facility whereas in GSR and AS when the specified triggering criteria have been met the Instrument either begin...

Page 8: ...ition as warranted buyer shall be entitled to a refund of the purchase price upon return of the instrument to GeoSIG 50 of freight charges on shipments of warranty repairs or replacements will be born...

Page 9: ...five connectors and a screw when fully equipped which are arranged in a row on the front of the housing as shown on Figure 2 These are labelled from left to right SENSOR RS 232 INTERCON OPTION POWER a...

Page 10: ...ming system tests Maximum data rate is 115 200 Baud INTERCON Optional This connector allows the Instrument to be interconnected to a recording array Different types of interconnections may be realised...

Page 11: ...ers always 1 Flip the main switch to OFF 2 Disconnect power supply from the POWER connector 3 Disconnect the main battery 4 Make sure that the green Active Charge AC LED indicator is off 3 6 Printed C...

Page 12: ...For an external battery an external charger has to be used Select therefore a charger with appropriate charging characteristics for the used battery 3 9 External DC Power Supply a DC powered Instrumen...

Page 13: ...owing the personnel in charge to be informed immediately on the severity of a strong event The outputs are 2 relay contacts either normally open NO or normally closed NC to be specified at order The m...

Page 14: ...attery charging You should make note at this point of any cultural or environmental sources of noise and vibration around the selected site which may cause false triggers of the recording mechanism Th...

Page 15: ...information The external power supply has to deliver a minimum of 300 mA at 15 VDC 4 2 3 Requirements for the Instrument Foundation Minimum surface area requirements with internal sensor 50 x 50 cm w...

Page 16: ...nal sensor is properly levelled using the levelling mechanism supplied within the sensor or the Instrument If no levelling mechanism is supplied make appropriate foundation arrangements that the Instr...

Page 17: ...meters start data acquisition or leave the Instrument for operation with the actual configuration as described in the following sections 4 4 Configuring Parameters and Putting in Operation For configu...

Page 18: ...erial data mode After logging in to the Instrument the serial data mode automatically stops and remains off for the time being logged in Data format 8 bytes are sent with each sample to the COM port B...

Page 19: ...ument can be directly connected to GeoDAS or SEISLOG in the Packet mode which increases the performance regarding event memory event detection and online GeoDAS SEISLOG and offline SEISAN analysis eno...

Page 20: ...al channel has a low pass 100 Hz 6th order Butterworth analog filter The sensor input signal passes through this filter prior to being sampled and converted to digital form This filter removes signal...

Page 21: ...e rates of 50 64 100 125 200 250 400 800 and 1000 SPS the data has to be further decimated digitally The digitised data still contains signal energy at frequencies of up to 500 Hz which has to be filt...

Page 22: ...ing from 0 to a maximum of 2048 Data recording is initiated when the amplitude exceeds the pre set threshold value The user may enter the threshold values in the selected channel unit GeoDAS calculate...

Page 23: ...to a low 0 V on a falling edge Several data recorders may be connected in bus fashion and triggered simultaneously by one trigger signal Whenever it is triggered regardless of trigger source the Inst...

Page 24: ...to the signal before the STA value gets to the trigger level In this case the theoretical maximum value for ALPHA would be 10 2048 ALPHA 20 log 20 dB 205 This would indicate that any value of ALPHA gr...

Page 25: ...d When an event occurs the Instrument stores digitised sensor data in its battery backed memory for later retrieval Recording continues as long as trigger criteria are met and then for an additional p...

Page 26: ...3 8 0 25 4 25 80 5 80 250 6 250 where 1 gal 1 cm s2 The below description is the actual Intensity Scale that is used only in GSR 18 Instruments The Intensity Scale is manually configurable within GeoD...

Page 27: ...rdware Real Time Clock RTC Battery Memory Each group may be selected individually to be performed Each group itself contains several test routines For each failure during any test a flag is set in the...

Page 28: ...nit may be defective contact GeoSIG or your local representative The ADC Resolution test monitors every value read from the AD Converter during system test If any value is outside the expected range a...

Page 29: ...again Clear the Warning Flag and run the Self Test again The Stack Monitor test monitors the microprocessor run time stack An overflow of the stack yields a Warning Reset the Instrument by flipping t...

Page 30: ...is is a severe error recording operation is not blocked by the GSR and AS instruments However the error information is as always indicated in the header of an occurring event for later validation of t...

Page 31: ...ke sure that the data can be used for analysing Download all event files to your PC before deleting them in the Instrument Run the Self Test again The Data Consistency test checks the block ordering o...

Page 32: ...e Reconnect the AC power cable switch off the Instrument and disconnect the main battery measure the voltage on the battery cables The voltage should be 13 8 0 3 VDC The physical condition of the Inst...

Page 33: ...sing 2 ID label 2 Installation 9 LCD 2 LED 2 LTA Update 19 main switch 5 Maintenance 26 Memory 25 memory upgrade 7 Modem 7 Options 7 overvoltage protection 9 phase shift 16 Power Supply 8 Real Time Cl...

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