Guralp-systems CMG-3ESPCD Manuale Utente

CMG-3ESPCDDigital Broadband SeismometerTechnical ManualDocument No. MAN-C3E-0002Designed and manufactured byGüralp Systems Limited3 Midas House, Call

CMG-3ESPCD Digital Broadband Seismometer Installing the 3ESPCD5. Within the next seven seconds, press any key to bring up the disk menu.6. Key to re

CMG-3ESPCD Digital Broadband Seismometer Installing the 3ESPCDIn seismic vaults, instruments are often installed on piers. It is important toensure t

CMG-3ESPCD Digital Broadband Seismometer Installing the 3ESPCDfacing North. This can be done by rotating the base of the sensor whilstobserving it fr

CMG-3ESPCD Digital Broadband Seismometer Installing the 3ESPCD6. Plug the grey/blue power/data cable into the ten-pin connector on theinstrument'

CMG-3ESPCD Digital Broadband Seismometer Installing the 3ESPCDstratify the air in the seismometer package. Position the thermalins

CMG-3ESPCD Digital Broadband Seismometer Installing the 3ESPCD4. Pour a layer of loose, fine sand into the pit to cover the base. The typeof sand use

CMG-3ESPCD Digital Broadband Seismometer Installing the 3ESPCDseismometer on top of this stone. This method emulates that in step 3,but can be perfor

CMG-3ESPCD Digital Broadband Seismometer Installing the 3ESPCDOther installations have been attempted with the instrument encased in

CMG-3ESPCD Digital Broadband Seismometer Installing the 3ESPCD3.6.1 Deployment1. Prepare a hole of 60 – 90 cm depth to compacted subsoil, or down tot

CMG-3ESPCD Digital Broadband Seismometer Installing the 3ESPCD5. Carefully insert the instrument into the hole, protected by a toughp

CMG-3ESPCD Digital Broadband Seismometer ContentsTable of Contents1 Preliminary Notes...

CMG-3ESPCD Digital Broadband Seismometer Installing the 3ESPCD12. Group the cables coming from the bag for a distance of about 1 m, andkeep them toget

CMG-3ESPCD Digital Broadband Seismometer Installing the 3ESPCD19. Attach the sensor power cable to the battery, and wrap it in anotherplastic bag. Pl

CMG-3ESPCD Digital Broadband Seismometer Installing the 3ESPCD7. Carry on removing soil, either with your hands or (very carefully!) withthe shovel, u

CMG-3ESPCD Digital Broadband Seismometer Installing the 3ESPCD7. Continue filling, moistening and packing until the instrument isburie

CMG-3ESPCD Digital Broadband Seismometer Installing the 3ESPCDAlternatively, for more downloading options, issue the command DISKMENUfrom the digitise

CMG-3ESPCD Digital Broadband Seismometer Installing the 3ESPCD1. Attach the disk to your computer. You can use FireWire, USB, or anyother interface su

CMG-3ESPCD Digital Broadband Seismometer Installing the 3ESPCDThe program will first search for non-DOS disks on all the interfaces itunderstands. I

CMG-3ESPCD Digital Broadband Seismometer Installing the 3ESPCD10. Status streams are also saved in multiple files, but have a default length of 24 hou

CMG-3ESPCD Digital Broadband Seismometer Calibrating the 3ESPCD4 Calibrating the 3ESPCD4.1 The calibration packAll Güralp sensors are fully calibrat

CMG-3ESPCD Digital Broadband Seismometer Calibrating the 3ESPCDmechanics and electronics can be disregarded. This relationship, given interms of the

CMG-3ESPCD Digital Broadband Seismometer5.1 Configuring digitisers...

CMG-3ESPCD Digital Broadband Seismometer Calibrating the 3ESPCDMAN-C3E-0002 30 Issue B - November 2013

CMG-3ESPCD Digital Broadband Seismometer Calibrating the 3ESPCDMAN-C3E-0002 31 Issue B - November 2013

CMG-3ESPCD Digital Broadband Seismometer Calibrating the 3ESPCDIf you want to repeat the calibration to obtain more precise valu

CMG-3ESPCD Digital Broadband Seismometer Calibrating the 3ESPCD• Injecting a sinusoidal current of known amplitude and frequencyallows

CMG-3ESPCD Digital Broadband Seismometer Calibrating the 3ESPCDtogether with a suitable duration and amplitude, and click Inject now.A new data

CMG-3ESPCD Digital Broadband Seismometer Calibrating the 3ESPCD8. The script will ask you to fill in sensor calibration parameters for eachcomponent y

CMG-3ESPCD Digital Broadband Seismometer Calibrating the 3ESPCDset to the model number of your instrument and Instrument Responseshould be set to corr

CMG-3ESPCD Digital Broadband Seismometer Calibrating the 3ESPCDThe bbnoisecal script automatically performs appropriate averagingto reduce the effects

CMG-3ESPCD Digital Broadband Seismometer Calibrating the 3ESPCD3. Repeat this measurement for several tilt angles.4. For the vertical sensor, the inpu

CMG-3ESPCD Digital Broadband Seismometer Using Scream!5 Using Scream!Scream! is a versatile seismic data visualisation program for

CMG-3ESPCD Digital Broadband Seismometer6.6.3 CENTRE...

CMG-3ESPCD Digital Broadband Seismometer Using Scream!Some of these options can also be altered in the Configuration set-up window.For more informatio

CMG-3ESPCD Digital Broadband Seismometer Using Scream!Type you set here determines which functions will be availablethrough the Scre

CMG-3ESPCD Digital Broadband Seismometer Using Scream!Güralp digitisers initially sample incoming data at a high rate (e.g. 512,000 Hzfor the DM24), w

CMG-3ESPCD Digital Broadband Seismometer Using Scream!Each combination of channel and tap has two check-boxes. The uppercheck-bo

CMG-3ESPCD Digital Broadband Seismometer Using Scream!• Z4, N4, E4 correspond to input channels Z, N, and E, output throughTap 2. A six-channel digi

CMG-3ESPCD Digital Broadband Seismometer Using Scream!There are two triggering algorithms which Güralp digitisers can use: STA/LTAand level-triggering

CMG-3ESPCD Digital Broadband Seismometer Using Scream!trigger. The Ratio column determines by what factor the STA and LTA mustdiffer for the trigger

CMG-3ESPCD Digital Broadband Seismometer Using Scream!For example, setting the STA to 1 second, the LTA to 10 seconds and the Ratioto 4 would give ris

CMG-3ESPCD Digital Broadband Seismometer Using Scream!LTA periods, together with the Ratio, without restarting the digitiser (seesect

CMG-3ESPCD Digital Broadband Seismometer Using Scream!As can be seen, the filter you choose defines the set of permissible samplerates. The spectral

CMG-3ESPCD Digital Broadband Seismometer Preliminary Notes1 Preliminary Notes1.1 Proprietary NoticeThe information in this document is proprietary t

CMG-3ESPCD Digital Broadband Seismometer Using Scream!5.1.3.2 LevelUsing the Level triggering method, a trigger is generated whenever one of theselect

CMG-3ESPCD Digital Broadband Seismometer Using Scream!The two boxes at bottom right of the Triggering pane allow the user to set thepre-trigger and po

CMG-3ESPCD Digital Broadband Seismometer Using Scream!The baud rate you choose must satisfy two conditions: •• It must be high enough to a

CMG-3ESPCD Digital Broadband Seismometer Using Scream!5.2 Controlling digitisersTo control a digitiser whilst it is running, either right-click on th

CMG-3ESPCD Digital Broadband Seismometer Using Scream!Enable GPS power cycling: If you are using a GPS unit to receive time signals,but do not experie

CMG-3ESPCD Digital Broadband Seismometer Using Scream!5.2.5 Data flowThe digitiser operates in one of several transmission modes. These modesrelate

CMG-3ESPCD Digital Broadband Seismometer Using Scream!5.2.5.1 DIRECTSyntax: DIRECTInstructs the digitiser not to use Flash memory for storage. Instea

CMG-3ESPCD Digital Broadband Seismometer Using Scream!instrument in FILING mode. This is useful, for example, in autonomousinstallations

CMG-3ESPCD Digital Broadband Seismometer Using Scream!instead. FIFO mode will consider a data block successfully transmitted onceit has received an a

CMG-3ESPCD Digital Broadband Seismometer Using Scream!Instructs the digitiser to transmit any continuous streams directly to clients asfor DIRECT mode

CMG-3ESPCD Digital Broadband Seismometer Introduction2 IntroductionThe CMG-3ESPCD is a full-featured three-axis digital seismometer consistingof th

CMG-3ESPCD Digital Broadband Seismometer Command line interface6 Command line interface6.1 IntroductionYou can connect to the internal software of t

CMG-3ESPCD Digital Broadband Seismometer Command line interfaceIf a command completes with nothing remaining on the stack, the digitiserwill show the

CMG-3ESPCD Digital Broadband Seismometer Command line interfaceTells the digitiser which kind of GPS is attached to it. The argument typecan be one

CMG-3ESPCD Digital Broadband Seismometer Command line interfaceThe AZIMUTH command only alters the digitiser's CMOS settings. You willneed to re-

CMG-3ESPCD Digital Broadband Seismometer Command line interface400 40 20 10 samples/sec400 40 samples/sec6.3.2 CONTINUOUSSyntax: tap components CONTIN

CMG-3ESPCD Digital Broadband Seismometer Command line interface• tap 4 will output all four components ( 1 + 2 + 4 + 8 = 15).To set triggered output s

CMG-3ESPCD Digital Broadband Seismometer Command line interfacewill calculate short-term averages for 1 second of the Z and N components,and 2 second

CMG-3ESPCD Digital Broadband Seismometer Command line interfacefor some time, all triggering components must fall below the threshold beforethe trigge

CMG-3ESPCD Digital Broadband Seismometer Command line interfaceThe arguments freq-or-period and unit together determine the frequencyof the calibratio

CMG-3ESPCD Digital Broadband Seismometer Command line interfacenumber generator produces true white noise over the entire passband, as

CMG-3ESPCD Digital Broadband Seismometer Introductionport or to a Güralp Systems data module using the cable supplied. Thedigitiser

CMG-3ESPCD Digital Broadband Seismometer Command line interfaceBecause of the way FORTH works, you can insert MINUTE commands intoSQUAREWAVE, SINEWA

CMG-3ESPCD Digital Broadband Seismometer Command line interface6.6.4 RE-BOOTSyntax: RE-BOOT (interactive)Causes the digitiser to reset after a delay o

CMG-3ESPCD Digital Broadband Seismometer Command line interface• the current position of the read pointer,• the stream and time-stamp of the latest da

CMG-3ESPCD Digital Broadband Seismometer Command line interfacefirst; the digitiser will only transmit the next block when it re

CMG-3ESPCD Digital Broadband Seismometer Command line interfacecomponent letter (N) and a tap number (1). Unlike most FORTH commands,the stream-id pa

CMG-3ESPCD Digital Broadband Seismometer Command line interface6.7.15 GOSyntax: GOCloses terminal mode, and begins any download that you have set up.

CMG-3ESPCD Digital Broadband Seismometer Command line interfaceDisk Options :- (A) save All data (N) save New data (S) save Selected time window (D) D

CMG-3ESPCD Digital Broadband Seismometer Inside the 3ESPCD7 Inside the 3ESPCD7.1 Inside the 3ESPCD7.1.1 The sensorsThe horizontal and vertical senso

CMG-3ESPCD Digital Broadband Seismometer Inside the 3ESPCDmotors. It responds to commands sent on three input lines by grounding for0.2 – 7 seconds.

CMG-3ESPCD Digital Broadband Seismometer Inside the 3ESPCDto one or other side. With the horizontal bases tilted, gravity will keep themasses press

CMG-3ESPCD Digital Broadband Seismometer Installing the 3ESPCD3 Installing the 3ESPCD3.1 First encounters3.1.1 UnpackingThe 3ESPCD seismometer is de

CMG-3ESPCD Digital Broadband Seismometer Inside the 3ESPCD4. The N/S sensor base is tilted to its level position. This process takesrather longer. At

CMG-3ESPCD Digital Broadband Seismometer Inside the 3ESPCD1. The BUSY LED pulses to indicate that it is centring the Z component.Each pulse corresp

CMG-3ESPCD Digital Broadband Seismometer Inside the 3ESPCDForce feedback seismometers of this type rely on the assumption that the forcetransducer pro

CMG-3ESPCD Digital Broadband Seismometer Inside the 3ESPCDThis arrangement results in two poles at specified frequencies. The velocityresponse of a c

CMG-3ESPCD Digital Broadband Seismometer Inside the 3ESPCD7.1.3.3 ComparisonsThe figures below plot the comparative response of a conventional velocit

CMG-3ESPCD Digital Broadband Seismometer Inside the 3ESPCD7.2 Inside the DM247.2.1 ArchitectureInternally, DM24 digitisers are structured as shown in

CMG-3ESPCD Digital Broadband Seismometer Inside the 3ESPCDsecond, triggered by timing signals from the ARM processor. The DSP cancontrol all 5 ADCs

CMG-3ESPCD Digital Broadband Seismometer Inside the 3ESPCD7.2.2 Updating firmware with an EAMThe simplest way to update the digitiser firmware is by u

CMG-3ESPCD Digital Broadband Seismometer Inside the 3ESPCDCheck that there is two-way communication with the digitiser by pressingEnter. The digitise

CMG-3ESPCD Digital Broadband Seismometer Inside the 3ESPCDNavigate through the directories on your computer and select the file to beuploaded, or type

CMG-3ESPCD Digital Broadband Seismometer Installing the 3ESPCD• Do not kink or walk on the data cable (especially on rough surfacessuch as gravel), no

CMG-3ESPCD Digital Broadband Seismometer Appendix A - Connector pin-outs8 Appendix A - Connector pin-outs8.1 GPS portThis is a standard 10-p

CMG-3ESPCD Digital Broadband Seismometer Appendix A - Connector pin-outsWiring details for the compatible socket,***-12-10S, as seen f

CMG-3ESPCD Digital Broadband Seismometer Appendix A - Connector pin-outs8.2 DATA OUT portThis is a standard 10-pin “mil-spec” plug,confor

CMG-3ESPCD Digital Broadband Seismometer Appendix A - Connector pin-outs8.3 FIREWIRE portThis is a standard 6-pin “mil-spec” plug,conform

CMG-3ESPCD Digital Broadband Seismometer Appendix A - Connector pin-outs8.4 AUXILIARY port (optional)This is a standard 19-pin “mil-spec”

CMG-3ESPCD Digital Broadband Seismometer Appendix B - Sensor Specifications9 Appendix B - Sensor SpecificationsHybrid sensors Velocity output bandwid

CMG-3ESPCD Digital Broadband Seismometer Appendix C - Digitiser specifications10 Appendix C - Digitiser specificationsSeismic channels Number 4Format

CMG-3ESPCD Digital Broadband Seismometer Appendix C - Digitiser specificationsAbsolute accuracy 0.5% standard (0.1% optional)Type 5th-order, single-bi

CMG-3ESPCD Digital Broadband Seismometer Revision History11 Revision HistoryA 5 November 2005 Initial documentB 14 November, 2013 Major rewriteMAN-C3