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M2166-VBB User`s Manual

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1. MOT CAL CAL CASE GND CASE GND EXT ANALOG GND EXT ANALOG GND EXT ANALOG POWER POS EXT ANALOG POWER NEG EXT RELAY POWER POS EXT RELAY POWER GND EXT 10 360 SECOND EN EXT DAMPING EN EXT CAL COIL CONNECT EN cc EXT RELAY POWER GND Pin LA IB ID PO aa bb ce E M2166 VBB User s Manual Rev 4 01 January 2015 8 of 65 Input Output RB Z Broad Band Velocity Z Broad Band Velocity Connection E RB Connection D eee RB o Connection C ee EBOOM ANALOG_GND o o N tij rd NIN ZIO zzz gS Elele EEEE S IS FJE 9 BBS 8 Z dB AUTOCENTER ENABLE 5V input for enabling autocenter of sensor elements CAL ENABLE 5V input for enabling calibration No Connection ENEJ ee a 10 SECOND ENABLE Input DIGITAL GND CAL IN CAL IN o Connection o Connection NE I o Connection ASE GND o Connection No Connection F a o Pin B D EE aa bb oc Table 2 CHA SIGNAL Connectors pinout description The connector is 851 07E16 26P50 A7 44 Nominal full scale output ranges for BRB are 11 5V 23V differential Nominal full scale output ranges for BOOM are 11 5V BRB are fully differential outputs with a common mode reference voltage defined by ANALOG GND BOOM POSITION is a single ended signal referenced to ANALOG GND CAL_IN is a differential input with ANALOG GND as a common mode referen
2. M2166 VBB Mechanical Sensor Elements M2166 Vertical Sensor Module VSM Figure 1C M2166 Horizontal Sensor Module HSM Figure 1D 4 M2166 VBB Cabling As of late 2014 the M2166 VBB system has been upgraded to Revision 4 01 This includes both functional and cosmetic changes to the Triaxial Sensor Package as well as changes to the packaging and electrical connection of the individual sensor modules M2166 VBB User s Manual Rev 4 01 January 2015 5 of 65 A Electronics Module B Triaxial Sensor Package po NR fanmi N Yimet rozet mena Horizontal Sensor Module Vagiical Sanja bei IM2166 HSM M21694 VSM i gt C Vertical Sensor Module l IH D Horizontal Sensor Module Figure 1 A Electronics Module Highly modular triaxial feedback electronics for complete control of M2166 VBB system B Triaxial Sensor Package This incorporates a warpless baseplate design as well as magnetic shielding for the vertical sensor element The package is finished with a durable epoxie enamel paint for enhanced corrosion resistance in wet environments C Vertical Sensor Module D Horizontal Sensor Module M2166 VBB User s Manual Rev 4 01 January 2015 6 of 65 1 M2166 EM Electronics Module Rev 4 00 This is a slightly modified version of Metrozet s STS1 E300 seismometer electronics that has been deployed worldwide for a number of years as a modern alternative to the original Streckeisen f
3. The drain shield of the cable is connected only on the M2166 EM end Z IAS lo myo Q gt Pin B o Ds a cja J M2166 VBB User s Manual Rev 4 01 January 2015 26 of 65 Souriau 851 Wire Color Name Souriau 851 06E16 06E16 26S50 44 26P50 44Plug Plug Inbound Outbound Pin Pin WHITE BOC BLACK ZBRB Be ee eB SIGNAL Bundle Shield SIGNAL Bundle Shield po ohra en 10 SECOND ENABLE pro o o za DIGITAL GND Gane z eee CAL INt CAL IN jeni z zij E ENEM DT ee eet en ee POWER Bundle Shield NEON RN NEO DE NE b BLACK Noted S dbo Table 8 Details of CHA SIGNAL cable connections The wires are grouped by twisted pair In addition they are bundled and shielded within each bundle so called SIGNAL CONTROL and POWER Bundles The POWER Bundle shield is connected directly at the digitizer end outbound It is connected through 1 Meg at the M2166 EM end inbound The user should not need to open the cable during normal operation with a Q330 digitizer M2166 VBB User s Manual Rev 4 01 January 2015 27 of 65 Souriau 851 Wire Color Name Souriau 851 06E16 06E16 26S50 44 26P50 44Plug Plug Inbound Outbound Pin Pin WHITE BOS BLACK ZLP SS jBe O Ro zj rali rr o Se eee SIGNAL Bundle Shield SIGNAL Bundle Shield poo oz oi eo oo v v po o vov E s voja III DSW NLP lt lt OD O BROWN S z a o
4. ZBOOMCTL Outputs Z Boom Position on Control Connector DISCCTL Disconnects Boom Position from Control Connector STATUS Prints Status of Control Connection to Boom Position EAUTOCTR Runs Autocenter on E Sensor NAUTOCTR Runs Autocenter on Sensor ZAUTOCTR Runs Autocenter on Z Sensor SAFE Puts System Into Default Analog Measurement Mod RETURN Return to Previous Menu Help for info on specific command EBOOMADC NBOOMADC and ZBOOMADC will read and report the E N and Z Boom Position voltage using the internal analog to digital converter ADC This is used typically for remote diagnostic operation EBOOMCTL NBOOMCTL and ZBOOMCTL will connect the analog Boom Position signal from either the E N or Z sensor across the OUTPUT_SIGNAL lines of the CONTROL connector This can be used for local diagnostic operations using a scope or DMM ESW NSW and ZSW read and report the state of the motor switch for the E N and Z sensor These commands will not be needed during typical operation EMOVE NMOVE 4 and ZMOVE starts the E N and Z centering motors in a direction that will cause the Boom Position signal to increase The user can stop the motor by hitting any key on the keyboard There is also a timeout counter that will stop the motor after 600 seconds of attempted movement During motor operation the system automatically and temporarily sets the sensors into 10 second mode with damping enable
5. and the vertical sensor should be connected to the Z channel This will allow the centering motor control to operate seamlessly Connect the SIGNAL cables between the M2166 EM module and the recording system Turn on the power supply The quiescent current draw should be approximately 350 mA 12V Observe that the command prompt M2166 VBB Main Menu MAIN gt is visible in the terminal window Hit Enter once or twice and observe that a new command prompt is generated each time to verify that the communication link is active The sensor should now be operational The user should refer to the detailed command listings found in the STS1 E300 manual http metrozetvbb com sts1 e300 html and beginning page 50 of this manual M2166 VBB User s Manual Rev 4 01 January 2015 48 of 65 Next Steps 1 Toggle each of the sensors temporarily into 10 second mode to reduce their electrical settling time 2 Center the boom of each of the sensors to within say 1V boom position voltage 3 Attach an oil free pump to the package open the valve and evacuate the system to below 25 Hg to 0 2 atm Metrozet can supply an oil free pump that is configured for direct connection to the system Close the valve and remove the pump 4 Re center the sensor booms as needed In particular the vertical sensor s boom position voltage will shift upward by 4 to 5 Volts as the air is removed from the package It will need to be re centered 5 Cover t
6. to 0330 CHB input CHA carries all of the reguired velocity signals boom position voltages and sensor mode control lines This connection alone is sufficient for most installations The CHB connection carries a differential version of the LP acceleration signal DC to 360 seconds that is provided for some legacy applications The cable polyurethane jacketed consists of 13 twisted pairs of 24 AWG stranded wire 7 strands There is a single shield drain that is attached to the body of the Souriau connector The details of the CHA SIGNAL cable are listed in Table 8 The details of the CHB SIGNAL cable are listed in Table 9 M2166 VBB User s Manual Rev 4 01 January 2015 24 of 65 iii CONTROL Cable BLUE This is a 16 conductor pigtailed cable that is terminated on one end with a Souriau 851 06E14 18P50 44 plug that attaches to the CONTROL connector on the electronics module The other end is left bare The cable polyurethane jacketed consists of 9 twisted pairs of 24 AWG stranded wire 7 strands This cable transmits RS 232 communications diagnostic signal outputs and auxiliary analog and digital signal inputs to the M2166 EM module There is a single shield drain that is attached to the body of the connector The details of the CONTROL cable are listed in Table 10 iv CAL Cable GREEN This is a 8 conductor cable that is terminated on one end with a Souriau 851 06E12 10S50 44 plug that attaches to the CAL connector on the electronics modu
7. 401 2013 mia ae per B Horizontal sensor module with locking screws attached to storage block Figure 10 Horizontal sensor module locking screws M2166 VBB User s Manual Rev 4 01 January 2015 23 of 65 4 M2166 VBB Cabling There are five types of color coded cables that are used within the M2166 VBB system All are fabricated using Souriau 851 series plugs Custom polyurethane jacketed cabling with twisted pair conductors and internal shields are employed throughout The connector terminations are potted internally and then overmolded for environmental integrity and to maintain fully hermetic gastight performance within the entire system Note that the CHA SIGNAL and CHB SIGNAL cables are terminated on the OUTBOUND end with a mating connector that plugs directly into a Ouanterra Q330HR recording system These cables can be sold in a pig tailed bare configuration as well The CONTROL CAL and POWER cables are normally terminated on only one end pigtailed to allow users to terminate them as needed for connection to their legacy instrumentation Metrozet can provide custom termination of these cables if necessary Please contact us to discuss your particular reguirements Each cable is color coded via its overmold There is also a white identification label that is attached to each cable on the end that is plugged into the M2166 EM module inbound side i SENSOR Cable ORANGE This is a 26 conductor cable that is
8. CONTROL OUTPUT PLUS S VIOLET CONTROL OUTPUT MINUS poor a o or oo v o ov No Connection No Connection Table 10 Details of CONTROL cable connections The wires are grouped by twisted pair M2166 VBB User s Manual Rev 4 01 January 2015 29 of 65 Souriau 851 Wire Color Name 06E12 10S50 44 Plug Pin AS WHITE A IN BoC BLACK CAL N ooo eee ae WHITE CAL_OUT ID BROWN CAL_OUT ee py No Connection S o O K NoConnection S o O Table 11 Details of CAL cable connections The wires are grouped by twisted pairs M2166 VBB User s Manual Rev 4 01 January 2015 30 of 65 Souriau 851 Wire Color 06E10 98S50 44 Plug Pin IB BLACK ___________ POWRR N o O WHITE CASE GND D No Comnectin oo o E NoConmection o o v vm PFO NoConnection o Table 12 Details of POWER cable connections The wires are grouped as a twisted triad M2166 VBB User s Manual Rev 4 01 January 2015 31 of 65 System Grounding There is a dedicated CASE GND wire or wires that propagate throughout the system It is attached physically to each mechanical sensor module Each sensor in turn is in physical contact through their leveling feet with the triaxial package There is an auxiliary CASE GND connection to the M2166 VBB TSP package that can be made through the brass thumbserew on its surface See Figure 3B There is a CASE GND wire in each of the three SENSOR cables that takes this signal ba
9. E300 User s Manual for specific details http metrozetvbb com stsl e300 html and to the detailed description beginning on page 50 of this manual M2166 VBB User s Manual Rev 4 01 January 2015 7 of 65 Electrical Connections M2166 EM Electronics Module The M2166 EM electronics shown in Figures 1 and 2 are housed in a watertight painted aluminum package Tables 1 through 6 provide a pin by pin description of each connector Description Proportional Differential Feedback Proportional Differential Feedback Integral Feedback Integral Feedback Demodulator Demodulator Oscillator Oscillator Motor Switch Motor Switch Motor Drive Motor Drive Calibration Coil Calibration Coil Case Ground Case Ground External Analog Ground to Sensor External Analog Ground to Sensor External Power to On Sensor Electronics External Power to On Sensor Electronics External Power to On Sensor Relays External Ground for Relay Power External Digital Control of 10 360 Second Mode External Digital Control for Damping On Ofi External Digital Control for Calibration Enable Reference for External Digital Control Lines a Table 1 SENSOR Connectors pinout description There are separate connections for E N and Z sensors The connector is Souriau 851 07E16 26S50 A7 44 Under normal operation these signals are not accessed by the user directly Name PDFB PDFB IFB IFB DEM DEM OSC OSC MSW MSW MOT
10. H W td ta ba est TMM PPA HH PRPVUPYFNNNN Ww ALOGPWR CTL Outputs Analog Power on Control Connector PUTPWR CTL Outputs Input Power on Control Connector PUTPWR CTL Outputs Input Power on Control Connector TEMPERATURECTL Outputs Temperature on Control Connector DISCCTL Disconnects Signals from Control Connector STATUS Prints Status of Control Connection SAFE Puts System Into Default Analog Measurement Mod RETURN Return to Previous Menu Help for info on specific command These commands allow the user to monitor the voltage level of a number of signals within the system Commands ending in ADC will measure and report the value of the selected signal via the on board ADC with 16V range Commands ending in CTL will physically connect the selected signal to M2166 VBB User s Manual Rev 4 01 January 2015 63 of 65 the OUTPUT SIGNALA4 lines on the CONTROL connector Note that these physical connections will remain until DISCCTL or SAFE is entered or until the activity timeout is reached DISCCTL disconnects all signals from the OUTPUT SIGNAL lines on the CONTROL connector The purpose of most of the command names is relatively obvious However ANALOG POWER refer to the regulated voltages used by the analog sensors 12V nominal INPUTPWR refer to the voltage levels of the input power 15V nominal AUXANALOG
11. Motor Limit Switch State Analog Power regulated power used by sensors Input Power Module Temperature via internal temperature sensor DAC Voltage Auxiliary Analog Input 0 and 1 Auxiliary Digital Input 0 and 1 All sensors set to 360 second corner frequency with damping engaged All motor calibration and diagnostic functions disconnected from sensor electronics Fail safe entered upon power up or power reset after 3600 second inactivity timeout or via remote command RS 232 9600 baud 8 data bits 1 stop bit No parity Full duplex no hardware handshaking SIGNAL 2 CHA Differential BRB E N Z single ended boom position E N Z outputs input of digital control signals CAL ENABLE AUTOCENTER ENABLE 10 SECONF ENABLE modes and input of external calibration signals CHB Differential LP signals E N Z Both SIGNAL connector pinouts match those of Q330 SENSOR 3 Individual connectors for each sensor Analog sensor signals digital motor control signals and CAL coil signals CONTROL 1 Power inputs RS 232 analog output of selected internal signals Auxiliary analog inputs and auxiliary digital inputs All are Souriau 851 series CHA SIGNAL 851 07C16 26P50 A7 44 26 pin CHB SIGNAL 851 07C16 26P50 A7 44 26 pin SENSOR 3 851 07C16 26S50 A7 44 26 socket POWER 851 07C10 98P50 A7 44 6 pin CONTROL 851 07C14 18S50 A7 44 18 socket CAL 851 07C12 10P50 A 7 44 10 pin 9 36V Unregulated into isolated DC DC con
12. SAFE mode also causes the M2166 EM processor to re calibrate its internal RS 232 baud rate generator If the M2166 EM is operated over a wide temperature range it is possible that the module s baud rate can drift relative to that of the communications system to which it is connected If this happens the user may see garbled characters being printed out from the module In this case the user simply enters SAFE mode to re calibrate the baud rate This should allow normal communication to resume As an additional safety measure the M2166 EM will also reset its baud rate if it receives improper commands or whenever the inactivity timer 3600 seconds is tripped In this way reliable communications are ensured without any user specific user input The STATUS command prompts the system to print its serial number software version number and the configuration of its axes The nominal factory default configuration is for the E and N axes to be horizontal sensors and the Z axis to be a vertical sensor This information is used during centering motor control If necessary say in the case of all vertical sensors the configuration can be changed via a set of hidden commands Please contact Metrozet for details M2166 VBB User s Manual Rev 4 01 January 2015 52 of 65 SENSOR Menu Commands E10 Set E Sensor to 10 Second Mode E360 Set E Sensor to 360 Second Mode EDAMP Engage E Sensor Damping UNDAMP Remove E Sensor Damping 10 Se
13. scalar responsivity to within 1 150 pounds 24 x 24 Footprint x 17 High Operating Temperature 5 C to 35 C Range 8 C without mass re centering M2166 VBB User s Manual Rev 4 01 January 2015 33 of 65 M2166 EM Electronic Module Specifications Format Electronics supports up to 3 fully independent sensor channels Nominally configured as E N and Z Single and dual axis versions available Nominal Low Corner 360 seconds Normal Operation Freguencies 10 Seconds Setup Nominal Damping 0 707 of critical Approximately 23V Differential for BRB and LP Approximately 11 5V Single Ended for Boom Position Exchange of electronics boxes will maintain corner frequency damping and scalar responsivity to within 1 Sensor Control Functions Via serial command strings Independent control of each sensor s low corner frequency 360 sec Default 10 sec in Setup Mode Independent control of each sensor s low corner frequency damping 0 707 of critical Default undamped in Setup Mode Via Digitizer Switch to 10 second setup mode via assertion of 10 SECOND ENABLE line from digitizer orange LED indicator when enabled Motor Control Functions Via serial command strings Independent monitoring of each sensor s motor limit switch Independent control of each sensor s centering motor ON OFF Direction One step Autocenter for each sensor Works seamlessly with both horizontal and vertical M2166 sensors Via Digitizer A
14. sensor This is shown in Figure 8B The preferred order for installing the locking screws is to first install the two short screws labeled VS on the head of the screw into the closely placed holes on the side of the sensor Do not tighten these yet Then the two long screws labeled VL can be installed into the pair of holes on opposite sides of the sensor Hand tighten the VL screws first and then finish by tightening the VS screws DO NOT OVERTIGHTENT THE SCREWS HAND TIGHT ONLY To remove the screws the oorder should be reversed Loosen the VS remove the VL screws and then remove the VS screws For shipment it is recommended to apply a piece of tape over each screw head to prevent shipping vibrations from loosening the locking screws The M2166 VSM has an integrated mechanical shield that protects the sensor elements during shipment and handling Electrical connection to the sensor is made via a 2mm shrouded ejector header that is located on the sensor s baseplate This is shown in Figure 9 As there are no user serviced parts in the sensor there is no reason to remove the mechanical shield M2166 VBB User s Manual Rev 4 01 January 2015 19 of 65 ili imetrozet menee ratrozeh Hec vse Vartcal Sar AeL M m 4d mas EL P B Vertical sensor module with locking screws attached to storage block Figure 8 Vertical sensor module locking screws M2166 VBB User s Manual
15. signals should not be used to measure critical parameters related to sensor linearity such as Total Harmonic Distortion or THD By themselves STEP SWEEP or any of the sine waves will not stimulate anything in the sensor Unless explicitly commanded nothing will be connected to the sensor CAL coils There are a number of ways to make this connection INTCALVELOCITY will route the above internally generated signals through a high pass filter stage with a 1 msec time constant The filter output is then connected simultaneously to the CAL coils of M2166 VBB User s Manual Rev 4 01 January 2015 56 of 65 the three sensors This provides for a velocity eguivalent stimulus of the sensor In this case the response of the BRB outputs will be flat over the passband of the sensor As an example Figure 4 shows the stimulus and BRB response for a velocity eguivalent STEP function Figure 5 shows the response from a velocity equivalent SWEEP function INTCALACCELERATION will route the above internally generated signals through a DC coupled attenuator The attenuator output is then connected simultaneously to the CAL coils of the three sensors This provides for an acceleration equivalent stimulus of the sensor In this case the response of the LP outputs will be flat over the passband of the sensor INTCALDISCONNECT will disconnect the internally generated calibration signals from the sensors CAL coils Note It is recommended to use ve
16. state that they were in corner freguency and damping prior to movement EAUTOCTR NAUTOCTR and ZAUTOCTR initiate a one step iterative autocenter algorithm on the E N and Z sensors The algorithm drives the Boom Position to a voltage between 0 20V and 0 20V through an iterative process These routines temporarily set the sensors to 10 second damped state and restore them to their original configuration when finished The algorithm will attempt to move the boom approximately 2 of the way to the target on each iteration automatically repeating until the target is reached or the number of iterations has reached 20 the limit Typically 5 or 6 iterations achieved in under 1 minute are needed to center the boom Again the user can stop the motor at any time by hitting any key on the keyboard Metrozet strongly recommends the use of the AUTOCTR modes for routine centering operations STATUS will report the current state of any connections of the Boom Position signals to the OUTPUT SIGNAL lines on the CONTROL connector The SAFE command will stop all motor motion and it will disconnect the motors electrically from the electronic module It will also remove relay power and return the user back to the MAIN menu where software access to other menus will again be blocked pending a re enabling of the system The RETURN command will return the user back to the MAIN menu M2166 VBB User s Manual Rev 4 01 January 2015 55 of 65 CA
17. visible in Figure 4C is provided This allows for precise orientation during horizontal sensor installation via alignment of a radial notch in the sensor to this alignment aid This is shown in Figure 5 The vertical sensor portion of the package contains an integral magnetic shield that encloses the vertical sensor element to reduce the effects of magnetic fields both anthropogenic and natural on the sensor There are a number of locations worldwide in which the ambient magnetic fields dominate the low frequency response of a vertical VBB sensor Providing a simple integrated shield is critical to achieving the lowest noise performance in the sensor The package with the magnetic shield installed is shown in Figure 6 M2166 VBB User s Manual Rev 4 01 January 2015 13 of 65 Electrical connection to the sensors is made via three bulkhead receptacles installed within aluminum sealing rings that are attached to the top of the M2166 VBB TSP baseplate This can be seen clearly in Figure 7 where one of the SENSOR cables orange hood is connected to the connector The M2166 VBB TSP is constructed from stress relieved 6061 T651 aluminum alloy The aluminum is nickel plated to increase electrical surface conductivity and coated with an epoxie enamel paint for corrosion resistance A Bubble Level B Edge of sensor baseplate defining E direction C Edge of sensor baseplate defining N direction Figure 2 A Bubble level fo
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19. 6 VBB User s Manual Rev 4 01 January 2015 61 of 65 SWEEP Response 0 30 0 20 0 10 0 10 AmplitudeSignal Volts 0 20 0 30 1 1 1 I 1 1 1 1 1 1 0 0 250 0 500 0 750 0 1000 0 1250 0 1500 0 1750 0 2000 0 2250 0 2500 Time Seconds SWEEP Response Zommed to Stepped Sine Portion 0 12 0 10 0 08 0 06 0 04 0 02 0 00 mplitudeSignal Volts o o ir Amp So 7 0 08 0 10 lt I 1 1 1 1 I 1 1 Li li 2285 1 2286 0 2287 0 2288 0 2289 0 2290 0 2291 0 2292 0 2293 0 2294 0 2295 Time Seconds Figure 5 Velocity Equivalent SWEEP Response This is recorded data Top panel is stimulus signal from internal SWEEP function This signal is fed through velocity equivalent circuit into the CAL coils of sensors Middle panel is the BRB output from the Z Sensor Bottom panel shows a zoomed view of the response during the stepped sine portion of the calibration M2166 VBB User s Manual Rev 4 01 January 2015 62 of 65 DIAGNOSTIC Menu Commands EBRB ADC Read E BRB on ADC EBRB ADC Read E BRB on ADC ELP ADC Read E LP on ADC ELP ADC Read E LP on ADC EBOOMADC Reads E Boom Position on ADC NBRB ADC Read N BRB on ADC NBRB ADC Read N BRB on ADC NLP ADC Read N LP on ADC NLP ADC Read N LP on ADC NBOOMADC Reads N Boom Position on ADC ZBRB ADC Read Z BRB on ADC BRB ADC Read Z BRB on ADC LP ADC Read Z LP on ADC LP ADC Read Z LP on ADC BOOMADC Reads Z Boom P
20. EXTCALCONNECT For this reason it is recommended that the user wait for a period of approximately 500 seconds after initiating CAL coil connection before beginning CAL stimulus M2166 VBB User s Manual Rev 4 01 January 2015 57 of 65 In some cases users may want to record both stimulus and response signals from a triaxial sensor using a recording system with only three channels EZSIGNALOUT will route the calibration stimulus signal either internnaly or externally generated depending upon whether the INTCAL or EXTCAL modes are enabled to the E SIGNAL connector It will route the same signal across both the BRB and LP outputs The E sensor signals outputs will be routed to the N SIGNAL connector The Z sensor outputs will remain connected to the Z SIGNAL connector NZSIGNALOUT will route the calibration stimulus signal either internnaly or externally generated depending upon whether the INTCAL or EXTCAL modes are enabled to the E SIGNAL connector It will route the same signal across both the BRB and LP outputs The N sensor signals outputs will remain connected to the N SIGNAL connector The Z sensor outputs will remain connected to the Z SIGNAL connector Two calibration runs one with EZSIGNALOUT and the next with NZSIGNALOUT will allow all channels to be calibrated DEFAULTSIGNALOUT will restore the system to the standard output mode E to E N to N and Z to Z INTCALOUT will route the internally generated ca
21. LIBRATE Menu Commands STEP Internal CAL Source Outputs O0V 7 5V 0V Step for 100 500 500 Seconds SWEEP Internal CAL Source Outputs LF and HF Sweep for 1382 Seconds 0 O01HZSINE Internal CAL Source Outputs 0 01Hz Sine for 1000 Seconds 0 10HZSINE Internal CAL Source Outputs of 0 10Hz Sine for 100 Seconds 1 00HZSINE Internal CAL Source Outputs of 1 00Hz Sine for 100 Seconds EXTCALCONNECT External CAL Inputt Attached Directly to E N Z CAL Coils EXTCALVELOCITY External CAL Inputt Velocity Equivalent Source Connected to E N Z CAL Coils EXTCALACCELERATION External CAL Input Acceleration Equivalent Source Connected to E N Z CAL Coils EXTCALDISCONNECT External CAL Input Disconnected from E N Z CAL Coils INTCALVELOCITY Internal Velocity Equivalent CAL Source Connected to E N Z CAL Coils INTCALACCELERATION Internal Acceleration Equivalent CAL Source Connected to E N Z CAL Coils TCALDISCONNECT Internal CAL Source Disconnected from E N Z CAL Coils ZSIGNALOUT CAL E Z Signals Connected to E N Z SIGNAL Connectors Respectively ZSIGNALOUT CAL N Z Signals Connected to E N Z SIGNAL Connectors Respectively EFAULTSIGNALOUT Restore Default SIGNAL Connections CALOUT External CAL Input Drive Signal Connected to CAL Outputt INTCALOUT Internal CAL Source Drive Signal Connected to CAL Outputt DISCCALOUT CAL Source Disconnected from CAL Outputt STATUS Prints Status of Control Connection SAFE Puts System Into Default Analog Measur
22. M2166 Very Broadband Triaxial Seismometer User s Manual Revision 4 01 metrozet Metrozet LLC 21143 Hawthorne Blvd 456 Torrance CA 90503 310 294 3724 www metrozetvbb com Copyright 2015 M2166 VBB User s Manual Rev 4 01 January 2015 1 of 65 M2166 Very Broadband Triaxial Seismometer M2166 VBB User s Manual Rev 4 01 January 2015 2 of 65 Table of Contents No User Serviced Parts Electrical Safety Notice p 4 Introduction and Instrument Description cccceccccescceccccescceesceeecs pp 5 31 System GOING 5 veno vana na Gne a RAN Aa p 32 M2 166 V BE S pecifi aliO NS se ne ee ea nee aken pp 33 41 Module Interchan Geant y sana aa Ga ka bek cin dua bk aaa p 42 ISTA MA TO a A AA Na EE pp 43 47 Initial OPDETAOM ani en vene nA aka akne p 48 NEUE DE aaa on A kena p 49 M2166 EM Commi atm sisicsscsseissievesiccasesevssncectsansndsivedssesivcsavenssedetastbareseessadevesies p 50 Control of Sensor Via 0330 Recorde cccccsscccsssccscsscsesecessccsesesccesscesesesssoscses p 51 M2166 EM Command Softwar e ccccccsccccscecccccccccccccccccceccccesscesccceese pp 51 64 Contact WEIN OZ na nisi aaa ka au Man jed ka aja ke p 65 Visit www metrozetvbb com for the latest version of this manual M2166 VBB User s Manual Rev 4 01 January 2015 3 of 65 No User Serviced Parts The M2166 VBB contains an electronics module three 3 individual sensor el
23. Neoprene jacket 6 meter length Dual ended cable between M2166 EM and M2166 TSP package Electronics end 851 06E16 26P50 A7 44 26 pin Package end 851 ET16 26S50 A7 44 26 socket rotating body 13 twisted pair cable with internal shields Neoprene jacket 6 meter length Single ended cable that connects to M2166 EM POWER Connector Electronics end 851 06E10 98P50 A7 44 6 socket POWER POWER_RTN CASE_GND Twisted triad 16 AWG conductors with internal shield Neoprene jacketed M2166 VBB User s Manual Rev 4 01 January 2015 39 of 65 12 meter length CAL Cable Green Single ended cable that connects to M2166 EM CONTROL Overmold Connector Electronics end 851 06E12 10S50 A7 44 10 socket CAL OUTPUT differential CAL INPUT differential CAL GND 4 twisted pair cable with internal shield Neoprene jacketed 6 meter length CONTROL Cable Blue Single ended cable that connects to M2166 EM CONTROL Overmold Connector Electronics end 851 06E14 18P50 A7 44 18 pin Connections to RS 232 TX RX GND Auxiliary ANALOG INPUT 0 and 1 ANALOG GND Auxiliary DIGITAL INPUT 0 and 1 DIGITAL GND 3 3 V External Digital Power DIGITAL GND CONTROL OUTPUT Differential EXT RESET Line for processor 8 twisted pair cable with internal shield Neoprene jacketed 6 meter length isolation and mechanical ruggedness gt 40M isolation at up to 40V HiPot between conductors M2166 VBB User s Manual Rev 4 01 January 2015 40 o
24. O 1 refer to the voltage levels of the auxiliary analog signals being injected through dedicated lines within the CONTROL connector Again these signals should have a full scale range between 16V AUXDIGITALO 1 refer to the digital levels of the auxiliary digital signals being injected through dedicated lines within the CONTROL connector Recording such levels might be useful for example to see if an intrusion detection switch has been actuated on the entrance to the seismic vault Again these inputs are protected but the digital levels should be between 2V and 6V TEMPERATURE refers to a low resolution temperature sensor LM35 that is mounted within the electronics box It is surely at a higher temperature than the ambient temperature in the vault SAFE disconnects all signals from the diagnostic system and from the OUTPUT SIGNALA lines It will also remove relay power and return the user back to the MAIN menu where software access to other menus will again be blocked pending a re enabling of the system The RETURN command will return the user back to the MAIN menu M2166 VBB User s Manual Rev 4 01 January 2015 64 of 65 Contact Metrozet If you have any questions problems or further needs regarding the M2166 VBB Triaxial Seismometer or Electronics Module please contact us Metrozet 21143 Hawthorne Blvd 4456 Torrance CA 90503 310 294 3724 support metrozet com www metrozetvbb com M2166 VBB User s Manual Rev
25. PC will need to have or emulate a COM port in order to communicate Many modern PCs do not have an internal COM port In this case the user will need to purchase for example a USB to COM port adapter module These are available at most computer retailers The COM port should be set up with the communications parameters listed above The M2166 EM recognizes backspace characters as entered through many terminal emulators such as PuTTY This is very useful for correcting errors in commands entered into the terminal Note however that some terminal programs transmit special characters e g CTL H for a backspace These characters will not be recognized by the M2166 EM External RESET The CONTROL connector contains an External RESET line CONTROL connector pin 6 that allows the user to reset the digital processor within the module should communications or control of the system become interrupted This digital RESET process does not affect the analog sensors Following RESET the digital processor will boot up and the communications prompt described below will be on the MAIN menu The system will come up in SAFE mode following a RESET The RESET is an active LOW input Its nominal voltage range is between 0 and 3 3V relative to DIGITAL GND CONTROL connector pin 4 It can be left unconnected for normal operation as it is pulled up internally However Metrozet recommends that users connect this to a remotely controlled digital line within
26. Rev 4 01 January 2015 20 of 65 Figure 9 View of radial shrouded ejector header on side of vertical sensor module In this picture the hole for the VL locking screw can be seen above the header M2166 VBB User s Manual Rev 4 01 January 2015 21 of 65 M2166 HSM Horizontal Sensor Module The M2166 HSM is a simple horizontal garden gate pendulum defined by a seismic mass that rotates around an axis defined by a pair of mechanical hinges There is no spring The mechanical natural period approximately six seconds is set during manufacturing by adjusting finely the angle of the moving boom with respect to the local gravity The sensor utilizes capacitive displacement sensing and force balance feedback to provide a velocity sensitive output over a passband of 360 seconds to approximately 18 Hz The moving mass boom is carefully balanced during manufacturing This provides the maximal sensitivity along the desired horizontal axis while minimizing sensitivity in the orthogonal horizontal Typical non orthogonality is under 0 25 The sensor is leveled during manufacturing so that it will provide accurate and repeatable response when installed into an accurately leveled baseplate The user should NOT adjust the two brass leveling feet as this will affect the sensor alignment and its performance The M2166 HSM contains a motorized boom centering system that performs fine leveling tilting of the sensor along the sensitive horizontal a
27. actory electronics FBE modules Similar to the STS1 E300 the M2166 EM is designed to operate a triaxial set of sensors two horizontal and one vertical In many respects the internal hardware and its operational modes are identical However the M2166 EM is specifically configured to work with Metrozet s new mechanical sensor elements M2166 VSM and M2166 HSM Among the modifications is the migration of critical feedback elements gain setting resistors and capacitors from the module out into the sensors This is an important improvement that greatly reduces the effects of electrical leakage e g in the cabling that are often prevalent in the original STS 1 sensors The M2166 EM maintains separate SENSOR connections and cables to each of the individual sensor elements It provides a general purpose CONTROL connection for power communication and diagnostic functions as is found in the STS1 E300 modules The output SIGNAL connections are integrated into a pair of connectors CHA and CHB that are designed for direct connection to a Q330HR data recorder Quanterra Inc Normal VBB recording can be accomplished via the CHA connection It includes differential BRB velocity signals mass position signals and external calibration stimulus from the Q330 The CHB connection provides access to the legacy long period acceleration LP signals that are recorded by some VBB users It can be attached to the CHB input to the Q330HR The CHA connector
28. axes indicated by the arrow on the top of each sensor are pointing in the E and N directions M2166 VBB User s Manual Rev 4 01 January 2015 47 of 65 Initial Operation At this point operation of the system involves connections and operations that are specific to the M2166 EM Operating the electronics involves a few simple steps l Connect the POWER and POWER RETURN wires of the Red Power cable to a high quality regulated power supply capable of providing at least 1A It is important to note that many commercial power supply modules including DC DC converters can exhibit start up problems at high load It is recommended that the user provides a power supply with a current rating that is at least 2X that which is required by the electronic module Metrozet recommends an Agilent E32620A Dual output 1A however many commercial power supplies will suffice With the power supply turned OFF connect the CONTROL cable to the M2166 EM module Assuming that one is using a local PC for command and control connect the RS 232 leads of the CONTROL cable to the COM port of a PC Or if using the STS1 PTM1 module connect to the PC using either the USB or Ethernet connection Launch a terminal emulator on the PC With the power OFF connect the SENSOR cables between each of the sensor modules and the M2166 EM module s SENSOR connectors In a normal triaxial application the two horizontal sensors should be connected to the E and N channels
29. bubble level Loosen the hex nut on each leveling screw and adjust until the system is level Tighten the hex nut gently 2 Connect the Orange booted SENSOR cables between the package and the M2166 EM Electronics Module Connect the E sensor connector on the package to the E SENSOR connections on the electronics module and so on Note that in the M2166 EM module the E and N channels horizontal operate in a slightly different fashion than the Z channel vertical This relates specifically to the operation of the centering motors It is advised that the E and N channels be used strictly for horizontal sensors and the Z channel for vertical sensors 3 Connect to CHA SIGNAL cable to the CHA input of a Q330HR digitizer or other suitably configured recording system Connect the CONTROL cable to the CONTROL connector of the M2166 EM module 4 Install the M2166 VSM vertical sensor into the front sensor mounting position red wiring board Insert the brass leveling feet through the holes of the wiring board while taking care to keep the ribbon cable outside of the sensor baseplate s footprint Rock the sensor slightly to ensure that it is properly seated on its mounting plate Plug the ribbon cable into the ejector header on the side of the sensor Remove the four 4 locking screws and store them on the block on the top of the sensor See Figure 8B Install the magnetic shield cover around the sensor and engage it friction fit with the bottom cap t
30. ce The digital enable lines are referenced to DIGITAL GND M2166 VBB User s Manual Rev 4 01 January 2015 9 of 65 Z po No Connection SSS S IL N ca a ze u Z a i ias F No Connection S z No Connection fT v o Zzam Z NALOG GND Reference Voltage for Output Signals No Connection ff oo No Connection ff o No Connection o No Connection oo No Connection oo No Connection ooo pg y y O No Connection o O O T C E O T O E ao T o o y Z Z z z iz z iz z z No Connection No Connection No Connection No Connection o Connection No Connection Z Z Z 4 Pin B O D IN Ja a aa bb Z Z 4 Table 3 CHB SIGNAL Connectors pinout description The connector is 851 07E16 26P50 A7 44 Nominal full scale output ranges for LP are 11 5V 23V differential LP are fully differential outputs with a common mode reference voltage defined by ANALOG_GND M2166 VBB User s Manual Rev 4 01 January 2015 10 of 65 Name RS 232 TX EXT RS 232 RX EXT DIGITAL GND EXT EXT RESET EXT AUX DIGITAL 0 EXT Auxiliary digital input Nominal VIH 3 3V maximum is 6V AUX DIGITAL 1 EXT Auxiliary digital input Nominal VIH 3 3V maximum is 6V signals AUX DIGITAL 3 3V EXT AUX ANALOG 0 i full AUX_ANALOG_GND ASE GND EXT CASE GND EXT CONTROL OUTPUT PLUS CONTROL OUTPUT MINUS No Connection po zo
31. ck to the M2166 EM electronics module The wires make contact inside the EM with its metallic case The shields drain wires of the SENSOR cables are attached to the CASE GND at the M2166 EM end only end with the white ID tag The POWER cable has a dedicated CASE GND wire that carries this signal out to the system power supply A CASE GND terminal is also available on the front panel of the M2166 EM module As it is not suitable to leave the potential of the sensors and the package floating electrostatic charging effects on floating surfaces can induce acceleration eguivalent signals in the sensors CASE GND is tied to local ANALOG GND so called EXT ANALOG GND within each sensor The SIGNAL cables CHA and CHB also have a CASE GND wire This is connected directly on the recording system end A 1 Meg ohm series resistance is inserted into this connection as is standard practice with the Q330HR The shields drain wires of these cables connected to the chassis ground so called PGP of the Q330HR digitizer and NOT to the case of the M2166 EM Again this follows a proven approach for integrating broadband sensors with the Q330HR digitizer Note that the M2166 VBB TSP package is galvanically isolated from the seismic pier It sits on insulating alumina feet Recommended POWER Cable CASE_GND Connection Under normal operation the free end of the CASE GND wire at the end of the POWER cable can be left unconnected However in certain enviro
32. contains a number of control lines AUTOCENTER ENABLE CAL ENABLE and 10 SECOND ENABLE that allow basic system control through the 0330 The module still retains a separate CAL connector for direct access to injection of external internal calibration signals A POWER connector is for input of unregulated single ended power 9V to 36V An on board isolated DC DC converter generates the internal supply voltages required to operate the module The POWER connector also provides a cabled connection to the system CASE GND A CASE GND connection is also available on the front panel of the module The M2166 EM module is shown in Figure 1A The details of the connectors are listed in Tables 1 6 The M2166 EM contains four 4 status LEDs The red POWER LED indicates that power is applied to the module The green CAL LED indicates that the system is in a calibration mode The yellow AUTOCENTER LED indicates that the system is executing an autocenter seguence The orange 10 SECOND LED indicates that one or more sensor axes are set for a 10 second corner period setup mode These modes can be set either via the digital lines in the CHA connector corresponding to 0330 so called generic enable lines or by RS 232 commands Under normal recording conditions only the red LED will be illuminated The installation operation general operating modes and the command set of the M2166 EM are nearly identical to that of the STS1 E300 We refer the user to the STS1
33. d This allows for much more accurate reading of boom position during motor motion The E and N sensor assumed horizontal boom positions will be read and reported at regular intervals while the motor is moving An estimated dead reckoned position will be reported for the Z sensor assumed vertical Note that the accuracy of the estimated value may vary significantly from sensor to sensor When motor movement has stopped the sensors are restored to the state that they were in corner frequency and damping prior to movement M2166 VBB User s Manual Rev 4 01 January 2015 54 of 65 EMOVE NMOVE and ZMOVE starts the E N and Z centering motors in a direction that will cause the Boom Position signal to decrease The user can stop the motor by hitting any key on the keyboard There is also a timeout counter that will stop the motor after 600 seconds of attempted movement During motor operation the system automatically and temporarily sets the sensors into 10 second mode with damping enabled This allows for much more accurate reading of boom position during motor motion The E and N sensor assumed horizontal boom positions will be read and reported at regular intervals while the motor is moving An estimated dead reckoned position will be reported for the Z sensor assumed vertical Note that the accuracy of the estimated value may vary significantly from sensor to sensor When motor movement has stopped the sensors are restored to the
34. damping in order to perform installation leveling operations The STATUS command will provide information about the current configuration corner frequency and damping state of each sensor The SAFE command will place each sensor in its normal 360 second Damped recording mode It will also remove relay power and return the user back to the MAIN menu where software access to other menus will again be blocked pending a re enabling of the system The RETURN command will return the user back to the MAIN menu M2166 VBB User s Manual Rev 4 01 January 2015 53 of 65 MOTOR Menu Commands ESW Read E Motor Switch OVE Run E Motor in Direction Outputs E Boom Position on ADC EMOVE Run E Motor in Direction Outputs E Boom Position on ADC NSW Read N Motor Switch NMOVE Run N Motor in Direction Outputs N Boom Position on ADC NMOVE Run N Motor in Direction Outputs N Boom Position on ADC ZSW Read Z Motor Switch ZMOVE Run Z Motor in Direction Outputs Z Boom Position on ADC ZMOVE Run Z Motor in Direction Outputs Z Boom Position on ADC STOP Stops All Motors DEFAULT Stops All Motors and Disconnects All Motor Switches from System EBOOMADC Reads E Boom Position on ADC NBOOMADC Reads N Boom Position on ADC ZBOOMADC Reads Z Boom Position on ADC EBOOMCTL Outputs E Boom Position on Control Connector NBOOMCTL Outputs N Boom Position on Control Connector
35. ement Mod RETURN Return to Previous Menu Help for info on specific command Jo zZ mH x STEP and SWEEP initiate an internal digital to analog converter DAC to generate an automatic calibration stimulus STEP produces an upward and downward step sequence 500 seconds at OV 500 seconds at 6 0V and 500 seconds at OV SWEEP generates a low frequency sweep from high to low frequency from approximately 128 second period to well above 1500 second period followed by a high frequency stepped sine sequence from 0 5 Hz to 40 Hz The former will serve as a stimulus for the 360 second corner of the instrument while the latter will elucidate the high frequency corner There is a 500 second quiescent period between sweeps and prior to the start of the low frequency sweep Figure 2 shows a plot of the step function waveform Figure 3 shows a plot of the sweep waveform There are three internal sine stimuli 1 00HZSINE 0 10HZSINE and 0 01HZSINE that will generate mono frequency quasi sine waves 100 cycles of 1 00Hz 10 cycles of 0 10 Hz and 10 cycles of 0 10 Hz These are useful for looking at specific response of the sensors at 1 00 0 10 and 0 01 Hz Note that due to limitations in the low power microprocessor and DAC used within the module these are not pure sine waves Therefore these
36. ements cabling and a triaxial package There is no reason to open or modify the electronics any of the sensor elements or any portion of the cabling There are no manual adjustments to make to nor are there any user serviced parts within the electronics sensor elements and cabling Opening and or modifying any of these sub components is unnecessary and doing so will void the instrument s warranty The one exception to this is the triaxial package It is expected that during normal operation this component will be opened temporarily to allow proper installation of the sensors Electrical Safety Notice As with all electrical instruments potentially lethal potentials can be present on all metal surfaces including conductors within any cables Proper grounding of these elements is important to minimize these risks The user of this product is responsible for its installation and operation in a safe manner and in accordance with all local reguirements for electrical safety M2166 VBB User s Manual Rev 4 01 January 2015 4 of 65 Introduction and Instrument Description Metrozet s M2166 VBB is an advanced triaxial very broadband VBB seismic sensor that provides a modern replacement for the original STS 1 sensor system discontinued by Streckeisein AG The The sensor is highly modular and it consists of four distinct sub components 1 M2166 Electronics Module EM Figure 1A 2 M2166 Warpless Triaxial Sensor Package TSP Figure 1B 3
37. es within the electronics Each mechanical sensor element is factory trimmed to provide the specified scale factor values BRB 2400 V sec m and LP 8000 V sec m and the specified low frequency corner parameters 2nd order high pass 360 seconds 0 707 damping with any M2166 EM module In this way any sensor element can be interchanged with any electronic channel without significantly changing the overall sensor response Uniformity of response i e change in response with any combination of sensors and electronics is better than 1 The design maintains the same coordinate frame as that of the original STS 1 sensors non Galperin with two sensor elements with inherent horizontal sensitivity and a single vertical sensor element that is carefully aligned to local gravity As such there is no sensor specific summing of the sort that is required for U V W to X Y Z conversion in many transportable sensors This allows sensor elements to be interchanged freely with no loss in transfer function accuracy The M2166 VBB TSP utilizes precision alignment aids to ensure accurate and orthogonal mounting of the sensor elements As a result the installation process is very similar to that of a standard transportable sensor orient and level the package using built in level and alignment features Following that one simply installs the sensor elements using alignment features integrated into the package This ensures precise leveling of the elements e
38. f 65 1 000E 6 8 000E 7 6 000E 7 White Metrozet Fi 4 000E 7 VBB Vertical E 2 000E 7 Sensor 0 000E 0 Veloc 2 000E 7 Red Reference 4 000E 7 STS 1 Vertical 6 000E 7 Sensor Original 8 000E 7 1 o 10000 20000 30000 40000 50000 60000 700 Time Seconds Power Spectral Density Signal Incoherent Noise and NLNM PSD Metrozet VBB SIGNAL N m i ASL STS 1z SIGNAL J N Metrozet Self Noise v NLNM ra 2 ca o Freguency Hz Signal Incoherent Noise and NLNM PSD 120 Sad i Metrozet VBB SIGNAL k NNNN Ha EEEH Ri MNE ASLSTS 1ZSIGNAL J 150 Metrozet Self Noise NLNM 170 180 RNS 190 dB re 1m sec 2 rtHz 5 S 200 1 1 0 001 0 01 0 1 1 H Freguency Hz T Figure 11 Low Frequency Self Noise data Top panel is measured ambient seismic waveform at ASL Bottom panels show signal PSD and self noise PSD relative to NLNM Coherence is measured relative to co located STS 1Z original Streckeien STS 1 sensor M2166 VBB User s Manual Rev 4 01 January 2015 41 of 65 Module Interchangeability Unlike lower performance portable VBB sensors the M2166 VBB is designed to simplify field maintenance Modularity is a key feature Each channel of every M2166 EM Electronics Module is made identical through careful trimming during manufacturing The electronics are remote to the sensor modules and to the package This allows for simple field replacement in case of problems failur
39. hat is outside of the red wiring board It may be necessary to twist rock the cover slightly to get it to engage Check to ensure that the O ring is properly seated in its groove on top of the sealing ring Install the aluminum cap by aligning the plastic pins on the sealing ring with notches on the flange of the cap Seat the flange of the cap onto the O ring and install the spring loaded locking screws 4 to secure the cap The screws can be finger tight Refer to Figures 12 13 5 Install the E STS1 HSM horizontal sensor module into the back left mounting position The small connector board on the sensor should face the east right hand direction Take care when handling the sensor not to dislodge the leveling fixture spring loaded on the bottom of the sensor Insert the leveling feet through the holes of the wiring board while taking care to keep the ribbon cable outside of the sensor baseplate s footprint Rock the sensor slightly to ensure that it is properly seated on its mounting plate Plug the ribbon cable into the ejector header Refer to Figure 14 Remove the four 4 locking screws and store them on the block on the top of the sensor See Figure 8B Check to ensure that the O ring is properly seated in its groove on top of the sealing ring Install the aluminum cap by aligning the plastic pins on the sealing ring with notches on the flange of the cap Seat the flange of the cap onto the O ring and install the spring loaded locking screws 4
40. he system with a metalized foam enclosure This enclosure can be similar to those used with other VBB instruments Take care that the enclosure does not contact the package or the SENSOR cables 6 Wait for system to stabilize Depending upon the location this may require a few hours to a few days 7 Perform a transfer function calibration of the system using the tools built in to the M2166 EM module e g velocity sweep Metrozet provides a turnkey analysis program CALEX MZ for determining the system poles zeroes from a sweep calibration Note Turn OFF power from the system before connecting or disconnecting any cable from the M2166 EM module M2166 VBB User s Manual Rev 4 01 January 2015 49 of 65 M2166 EM Communications Communication with the M2166 EM module is via a native RS 232 interface EIA TIA 232 compliant This asynchronous serial link operates at 9600 baud 8 data bits 1 stop bit no parity RS232 TX RS232 RX and DIGITAL GND can be connected to a PC s COM port to pins 2 3 and 5 respectively on a 9 pin D connector as shown in Table 9 This forms a full duplex serial link without hardware handshaking 5 RS232 RX BO DIGITAL GD 4 Table 9 Details of connection of RS 232 link to PC COM port connector Bi directional communication can be made via one of a number of terminal emulators including HyperTerminal which is included with most modern versions of the Windows operating system Note that the
41. icroswitches to prevent over travel of adjustment stage On board Electronic Capacitive preamplifier 6 mW total power dissipation Components Feedback setting resistors and capacitors Relays for 10 sec 360 second switching damping control Relay for calibration signal connection normally open relay Electrical connection 2 mm 26 contact shrouded ejector connector Samtec EHT 113 01 S D RA Header Grounding CASE_GND wire in SENSOR cable is connected to body of sensor Electronics EXT_ANALOG_GND wire in SENSOR cable is also connected to body of sensor Sensor body is connected to STS1 VBB TSP package through sensor s brass mounting feet M2166 VBB User s Manual Rev 4 01 January 2015 38 of 65 M2166 VBB Cabling CHA and CHB SIGNAL Cable White Overmold SENSOR Cable Orange Overmold POWER Cable Red Overmold Dual ended cable compatible with Q330HR connection Electronics end 851 06E16 26S50 A7 44 26 socket Q330HR end 851 06E16 26P50 A 7 44 26 pin CHA Conventional broadband sensor connections including E N Z BRB Velocity signals differential E N Z Boom position signal single ended AUTOCENTER ENABLE 10 SECOND ENABLE and CAL ENABLE lines CAL Input differential from digitizer ANALOG GND DIGITAL GND CASE GND 1M series impedance between ends CHB E N Z LP Acceleration signals differential ANALOG GND Same cable can be used for either connection 12 twisted pair cable with internal shields
42. le The cable polyurethane jacketed consists of 4 twisted pairs of 24 AWG stranded wire 7 strands There is a single shield drain that is attached to the body of the Souriau connector This cable carries calibration stimulus signals between the M2166 EM and the user s specialized recording system The details of the CONTROL cable are listed in Table 11 v POWER Cable RED This is a twisted 3 conductor cable 16 AWG that provides power unregulated 9V to 36V to the M2166 EM The third wire is a dedicated CASE_GND connection into the system It is terminated on one end with a Souriau 851 06E10 98S50 44 plug The details of the POWER cable are listed in Table 12 M2166 VBB User s Manual Rev 4 01 January 2015 25 of65 Souriau 851 Wire Color Souriau 851 ET16 06E16 26P50 44 26S50 44 Plug Plug Inbound Outbound WHITE PDFBt BLACK PDFB WHITE BROWN WHITE RED WHITE ORANGE ese z 858 WHITE YELLOW WHITE GREEN WHITE N PO BLUE para WHITE CASE GND VIOLET CASE GND a Ne Na TC WHITE EXT ANALOG GND U O JGRAY CS EXT_ANALOG_GND BLACK EXT ANALOG POWER POS BROWN EXT ANALOG POWER NEG ra ee vina ui BLACK EXT RELAY POWER POS EXT RELAY POWER GND poo o o eo o eo BLACK EXT 10 360 SECOND EN ORANGE EXT DAMPING EN ee o o b BLACK EXT CAL COIL CONNECT EN YELLOW EXT RELAY POWER GND po o o oo o oi v DRAIN SHIELD CASE GND Table 7 Details of SENSOR cable connections The wires are grouped by twisted pair
43. libration signals to the CAL_OUT lines EXTCALOUT will route the externally injected via CAL_IN calibration signals to the CAL OUT lines DISCCALOUT will disconnect all signals from the CAL OUT4 lines STATUS will report the current connections within the calibration hardware The SAFE command will disconnect the sensor CAL coils from all signals It will disconnect the CAL_IN lines from the calibration hardware in the module and will disconnect all signals from the CAL _OUT lines The SIGNAL outputs if changed via the EZSIGNALOUT or NZSIGNALOUT commands will be set back to their normal operating states E to E N to N and Z to Z It will also remove relay power and return the user back to the MAIN menu where software access to other menus will again be blocked pending a re enabling of the system The RETURN command will return the user back to the MAIN menu M2166 VBB User s Manual Rev 4 01 January 2015 58 of 65 Frequency Response Analysis The major reason for any calibration seguence is to measure or validate the freguency response of a sensor There are a number of possible methods for analyzing recorded stimulus response data in order to determine the freguency response poles zeros Metrozet has developed a modern software applet CALEX MZ MSEED based upon a grid search method that will automatically analyze recorded data in standard seismic data format Mini SEED in order to generate the exact poles and ze
44. liminating the need for time consuming field leveling procedures that were required with the original sensors The same alignment aids ensure very high axis to axis orthogonality non orthogonality of under 0 5 This eliminates a significant problem with the original STS 1 sensors individually packaged in which discrete sensors exhibit relative misalignments in azimuth of up to 10 degrees within a number of global networks M2166 VBB User s Manual Rev 4 01 January 2015 42 of 65 Installation Standard installation of the M2166 VBB system involves the following steps 1 Orient and Level the M2166 VBB TSP baseplate Align the sensor axes with known compass directions using either a laser pointer or alignment rod inserted into the azimuth alignment block Alternatively the edges of the package baseplate can be aligned with the known compass directions The nominal sensitive axis directions are shown in Figure 2 Note that there is no absolute reason that the sensor E axis must be aligned with the E compass direction For example the package can be rotated 90 if that will facilitate its mounting on certain piers A counterclockwise 90 rotation for example would align the E sensor direction with compass N It would align the N sensor axis with compass W This is quite reasonable provided the user accounts for the rotation in their sensor metadata Once the azimuth is set the tip tilt of the plate should be adjusted in order to center the
45. locity equivalent signals when calibrating the standard BRB velocity sensitive outputs Similarly it is recommended to use acceleration equivalent signals when calibrating the standard LP acceleration sensitive outputs In certain cases users may want to generate calibration stimulus signals externally EXTCALVELOCITY and EXTCALACCELERATION will route external signals from the CAL _IN lines of the CAL connector through the AC and DC coupled stages respectively The conditioned signals will be connected simultaneously to the CAL coils of the three sensors This will generate velocity equivalent and acceleration equivalent versions of the external signal When generating acceleration equivalent signals the external signal should be limited to approximately 7 5V to avoid signal clipping within the electronics EXTCALCONNECT will make a direct connection between the CAL IN lines and the sensors CAL coils There is no attenuation so the user should take great care to avoid overdriving the sensor an attenuation of at least 2500X for a drive amplitude of 7 5 V is recommended to avoid clipping within the electronics signal chain EXTCALDISCONNECT will disconnect the externally injected calibration signals from the sensors CAL coils Note Typically there will be a small transient response observed when any signals are connected to the CAL coils via INTCALVELOCITY INTCALACCELERATION EXTCALVELOCITY EXTCALACCELERATION or
46. ncorporates the proven design of the Wielandt A SL warpless baseplate in order to minimize the effects of atmospheric pressure fluctuations via deformations of the baseplate surface This design consists of a rigid baseplate and symmetric vacuum regions on both sides of the plate As has been demonstrated previously Holcomb and Hutt http aslwww cr usgs gov Publications pdffiles asl92 1 pdf this designs tends to equalize i e cancel pressure dependent forces on each side of the baseplate The result is a highly stable surface in which small local tilts and deformations of the sensor mounting points within the package are minimized The M2166 VBB TSP integrates all three sensor axes within a single package This allows a high degree of relative alignment accuracy i e orthogonality between the individual sensor elements as a set of alignment structures are integrated into the package A picture of the package is shown in Figure 1A The M2166 VBB TSP incorporates a bubble level for tip tilt adjustment Figure 2A This allows for precise leveling of the baseplate during installation via three fine leveling screws at the periphery of the baseplate Two of these screws are visible in Figure 1B Global azimuth is defined by the edges of the package baseplate These are marked as shown in Figures 2B and 2C The M2166 VBB TSP uses solid aluminum pressure housings and high reliabilty O ring seals in order to provide a stable long lasting vacuum en
47. nd force balance feedback to provide a velocity sensitive output over a passband of 360 seconds to approximately 11 Hz The module is carefully leveled i e aligned to the gravity vector at the time of manufacturing This provides the maximal sensitivity to vertical ground motion while minimizing sensitivity to horizontal displacements and tilts Typical axis misalignment is under 500 micro radians This degree of alignment is maintained during deployment by placing the sensor into an accurately leveled baseplate The user should NOT adjust the three brass leveling feet as this will affect the sensor s alignment and its performance The M2166 VSM contains a motorized boom centering assembly that is very similar to that of the original STS 1V sensor It shifts a small mass on the moving boom in order to compensate for changes in spring force due to temperature variations in local gravity and any other mechanical forces that may be present in the system It contains a micro switch that ensures disengagement of the motor system from the boom following adjustment The assembly supports both the user controlled centering and autocentering modes that are provided within the M2166 EM electronics The moving sensor boom is locked for shipment using four brass screws The screws are removed to operate the sensor Figure 8A shows the vertical sensor module with the locking screws installed Once removed the screws can be stored on a block on the top of the
48. nments the lowest noise performance might require that this wire be tied to a common potential at the system s power source This connection might be directly made to POWER GND or to local EARTH Alternatively it might be tied through a large resistance say 1 MOhm to either of these potentials The exact grounding details may need to vary from location to location M2166 VBB User s Manual Rev 4 01 January 2015 32 of 65 Metrozet M2166 VBB Detailed Specifications General System Specifications EX NY UP Z Two 2 horizontal sensors one 1 vertical sensor Sensors modules are removable from package swappable Velocity BRB Output 2400 V sec m differential Acceleration LP Output 8000 V sec m differential Boom Position Output 4000 V sec m single ended Nominal Low Corner Horizontal and Vertical Sensors Freguencies 0 00278 Hz 360 seconds Normal Operation 0 1 Hz 10 seconds Setup Nominal Damping 0 707 of critical 2nd Order High Pass Nominal High Frequency 15 Hz with damping 0 7 of critical Corner Frequencies Full Scale Range Velocity BRB linear to 8 mm sec Self Noise Below NLNM and GSN Noise Minimum between 0 001Hz and 5 Hz See Figure 10 for low frequency incoherent self noise PSD data Intermodulation Distortion Under 80 dB for 1 00 and 1 05 Hz signals at 10 of full scale velocity IMD Uniformity Exchange of electronics boxes and or sensor modules will maintain corner frequency damping and
49. o or o rr o Se gee ji Z ZL CONTROL Bundle Shield CONTROL Bundle Shield NE v NR LES AN S a v WHITE py No Connection No Connection WHITE YELLOW fe i Tt WHITE ANALOG_GND ORANGE Not Used eee ee R pa ee pana ee pO N X Y Oo o rji ooo o o a through 1 MEG POWER Bundle Shield POWER Bundle Shield a NE ee NE VONN b BLACK Not sed S db O Table 9 Details of CHB SIGNAL cable connections The wires are grouped by twisted pair In addition they are bundled and shielded within each bundle so called SIGNAL CONTROL and POWER Bundles The POWER Bundle shield is connected directly at the digitizer end outbound It is connected through 1 Meg at the M2166 EM end inbound The user should not need to open the cable during normal operation with a Q330 digitizer The CHB connection to the Q330 is only utilized in order to record the long period acceleration signals LP M2166 VBB User s Manual Rev 4 01 January 2015 28 of 65 Souriau 851 Wire Color Name 06E14 18P50 44 Plug Pin WHITE RS 232 TX EXT IB BLACK RS 232 RX EXT es a o o O WHITE DIGITAL GND EXT DCT BROWN EXT RESET EXT WHITE AUX DIGITAL 0 EXT AUX DIGITAL 1 EXT WHITE AUX DIGITAL GND EXT ORANGE AUX DIGITAL 3 3V EXT ST WHITE AUX ANALOG 0 IK O YELLOW AUX ANALOG 1 pa ja o OO L O WHITE AUX ANALOG GND IM _ GREEN AUX ANALOG GND WHITE CASE GND EXT P BLUE CASE GND EXT ee eee SR S mA o ae O WHITE
50. oo O je gt a o y O No Connection Table 4 CONTROL Connector pinout description The connector is Souriau 851 06E14 18S50 A7 44 RS232_TX RS_232_RX and DIGITAL_GND form a full duplex RS 232 link EIA TIA 232 without hardware handshaking Most internal signals can be output on OUTPUT SIGNAL4 via software commands described below AUX ANALOG 0 and 1 are analog inputs with a full scale range of 16V AUX DIGITAL 0 and 1 are digital state inputs with conventional 3 3V CMOS levels They are diode protected to allow input voltage levels between 2V and 6V M2166 VBB User s Manual Rev 4 01 January 2015 11 of 65 Pin Name Description Input Output CAL INPUT PLUS EXT External CAL source input B CAL INPUT MINUS EXT External CAL source input I NoConnection o oo S K NoConnecton S S O Table 5 CAL Connector pinout description The connector is Souriau 851 07C12 10P50 A7 44 Pin Name Description Input Output POWER PLUS EXT External CAL source input B POWER RETURN EXT External CAL source input Input Output D NoConnection d o o oS S E NoConnection o oS o o o z y F NoConnection Pf Table 6 POWER Connector pinout description The connector is Souriau 851 07C10 98P50 A 7 44 M2166 VBB User s Manual Rev 4 01 January 2015 12 of 65 2 M2166 VBB TSP Warpless Triaxial Sensor Package Rev 4 01 This is a triaxial vacuum package that i
51. oom Design is passively protected against over travel On board Electronic Capacitive preamplifier 6 mW total power dissipation Components Feedback setting resistors and capacitors Relays for 10 sec 360 second switching damping control Relay for calibration signal connection normally open relay Electrical connection 2 mm 26 contact shrouded ejector connector Samtec EHT 113 01 S D RA Header Grounding CASE_GND wire in SENSOR cable is connected to body of sensor Electronics EXT_ANALOG_GND wire in SENSOR cable is also connected to body of sensor Sensor body is connected to STS1 VBB TSP package through sensor s brass mounting feet M2166 VBB User s Manual Rev 4 01 January 2015 37 of 65 M2166 HSM Horizontal Sensor Module 8 0 diameter x 9 5 Height Two 2 brass feet and a single polished stainless steel foot Factory set for proper mechanical free period Integral Shields Physical non hermetic shield to protect sensor mechanics during shipment and handling 6061 T651 Aluminum nickel plated Carrying Handle Mounted on top of sensor Mechanical Pendulum Hinged boom configured in as horizontal garden gate pendulum Design Approximate 6 second mechanical free period Sensing Method Sensor or transport Boom Centering Motorized centering assembly tilts sensor over a range of 2 mrad by adjusting height of polished steel leveling foot Microswitch to ensure mechanical de coupling of centering motor from boom M
52. osition on ADC UXANALOGO Read AUX 0 Input on ADC UXANALOG1 Read AUX 1 Input on ADC ACADC Read DAC Voltage on ADC ALOGPWR ADC Read Analog Power on ADC ALOGPWR ADC Read Analog Power on ADC PUTPWR ADC Read Input Power on ADC PUTPWR ADC Read Input Power on ADC EMPERATUREADC Read Temperature on ADC XDIGITALO Reports State of Input Signal on AUX Digital Input 0 XDIGITAL1 Reports State of Input Signal on AUX Digital Input 1 RB CTL Outputs E BRB on Control Connector RB CTL Outputs E BRB on Control Connector P CTL Outputs LP on Control Connector P CTL Outputs LP on Control Connector BOOMCTL Outputs E Boom Position on Control Connector RB CTL Outputs N BRB on Control Connector RB CTL Outputs N BRB on Control Connector NLP CTL Outputs N LP on Control Connector NLP CTL Outputs N LP on Control Connector NBOOMCTL Outputs N Boom Position on Control Connector ZBRB CTL Outputs Z BRB on Control Connector ZBRB CTL Outputs Z BRB on Control Connector ZLP CTL Outputs Z LP on Control Connector ZLP CTL Outputs Z LP on Control Connector ZBOOMCTL Outputs Z Boom Position on Control Connector AUXANALOGOCTL Outputs AUX 0 Input on Control Connector AUXANALOGICTL Outputs AUX 1 Input on Control Connector DACCTL Outputs DAC Voltage on Control Connector ANALOGPWRt CTL Outputs Analog Powert on Control Connector A I T CH C w H ry aa
53. r precise leveling of package during installation B E direction marking along back edge of baseplate C N direction marking along right edge of baseplate M2166 VBB User s Manual Rev 4 01 January 2015 14 of 65 A Spring loaded locking screw B Optional package ground attachment points C Vacuum pumping stack Figure 3 A Spring loaded locking screw for providing consistent electrical connection between the vacuum cans and the sealing rings blue This is one of four used per vacuum can B Optional electrical connection to package This is tied to the baseplate and to each of the sealing rings C Vacuum pumping stack This includes a guick disconnect port a vacuum ball valve and a mechanical pressure gauge Behind the stack is a fitting for venting the package M2166 VBB User s Manual Rev 4 01 January 2015 15 of 65 A Sensor mounting locations with color coded wiring boards Red front center is for vertical sensor Blue board in upper left corner is for E sensor Blue board in upper right corner is for N sensor B Close up of vertical sensor mounting C Close up of horizontal sensor mounting Figure 4 A Color coded mounting locations for vertical sensor red board and two horizontal sensors blue boards B Close up of vertical mounting location shows clearance holes for sensor feet and ribbon cable for connection to sensor element C Close up of horizontal sensor mounting location showing clea
54. rance holes for sensor feet and ribbon cable for connection to sensor element Also visible is a red alignment aid for precise azimuthal alignment of horizontal sensors M2166 VBB User s Manual Rev 4 01 January 2015 16 of 65 Figure 5 Blurry picture of red alignment aid nestled into radial notch on horizontal sensor module Figure 6 Package with magnetic can installed in front location This picture also shows one of the vacuum cans installed M2166 VBB User s Manual Rev 4 01 January 2015 17 of 65 Figure 7 Connection of SENSOR cable to bulkhead receptacle on sealing ring of vertical sensor position M2166 VBB User s Manual Rev 4 01 January 2015 18 of 65 3 M2166 VBB Mechanical Sensor Elements M2166 VSM Vertical Sensor Module The M2166 VSM is a balanced pendulous sensor operating at a nominal natural period of approximately six seconds It uses an astatic leaf spring design similar to that described by Wielandt and Streckeisen Wielandt E and G Streckeisen The leaf spring seismometer design and performance Bull Seis Soc Am 72 Part A 2349 2367 1982 This spring balances the angular position of a mechanical boom which rotates around an axis defined by a pair of mechanical hinges The sensor incorporates a temperature compensating design that allows operation over a fairly wide temperature range approximately 16 C without mechanical re centering The sensor utilizes capacitive displacement sensing a
55. ros of the M2166 VSM and M2166 HSM sensors Please visit http www metrozetvbb com for the software and more information STEP Stimulus 7 00 6 00 5 00 4 00 3 00 2 00 1 00 AmplitudeSignal Volts 1 00 0 0 1250 0 Figure 2 Internal STEP calibration function This is recorded data The ringing on at the rising and falling edges is simply an artifact of the digital filter used in our data acquisition system M2166 VBB User s Manual Rev 4 01 January 2015 59 of 65 SWEEP Stimulus Figure 3 Internal SWEEP calibration function This consists of a low frequency sweep and a high fregueney stepped sine 0 5 to 40 Hz M2166 VBB User s Manual Rev 4 01 January 2015 60 of 65 STEP Response 0 30 0 20 0 10 0 10 AmplitudeSignal Volts 0 20 0 30 1 1 1 1 1 I 0 0 STEP Response Zoomed Into Start of Step 0 30 0 25 0 20 0 15 0 10 AmplitudeSignal Volts 0 05 Figure 4 Velocity Eguivalent STEP Response This is recorded data Top panel is stimulus signal from internal STEP funetion This signal is fed through velocity eguivalent circuit into the CAL coils of sensors Middle panel is the BRB output from the Z Sensor Bottom panel shows a zoomed view of the step onset The ringing specifically its period and amplitude decay rate is related to the high frequency corner and damping of the STS 1 sensor s response nominally at 10 Hz M216
56. s for electrical connection to sensor modules Ribbon cable is Samtec TCSD 13 D 04 00 01 F N Environmental Protection Vacuum tight pressure housing and use of pressure compensating warpless baseplate design Inte netic shield in vertical sensor mounting port Vacuum Manifold Integrated with baseplate Includes vacuum valve mechanical vacuum gauge and quick disconnect port Doubly redundant quick disconnect vacuum pumping port Accepts McMaster Carr 8636T223 hose coupling Ground Isolation and Entire package is galvanically isolated from pier via alumina Connection balls in leveling screws Explicit package ground connection via thumb screws on baseplate and on sealing ri M2166 VBB User s Manual Rev 4 01 January 2015 36 of 65 M2166 VBB Sensor Modules M2166 VSM Vertical Sensor Module Module Size 8 0 diameter x 10 5 Height Three 3 brass feet factory set for vertical alignment Integral Shields Physical non hermetic shield to protect sensor mechanics during shipment and handling 6061 T651 Aluminum nickel plated Mechanical Pendulum Hinged boom with temperature compensated astatic leaf spring Design Approximate 6 second mechanical free period Acceleration Sensing Method Sensor or transport Boom Centering Motorized centering assembly moves small mass on boom to balance sensor over range of 3 mg about nominal factory acceleration 9 796 Microswitch to ensure mechanical de coupling of centering motor from b
57. t Sensor to 10 Second Mode O Set N Sensor to 360 Second Mode DAMP Engage N Sensor Damping UNDAMP Remove N Sensor Damping 10 Set Z Sensor to 10 Second Mode O Set Z Sensor to 360 Second Mode DAMP Engage Z Sensor Damping UNDAMP Remove Z Sensor Damping EFAULT Restores All Sensors to 360 Seconds with Damping Engaged TATUS Prints Configuration of Sensors AFE Puts System Into Default Analog Measurement Mod ETURN Return to Previous Menu Help for info on specific command WwW OD IV DOOUNNNN Z z z z bH tj tj UD fon E10 N10 and Z10 set the E N and Z sensors into a 10 second setup mode This is useful for quickly settling the electronics following power ON or for installation and leveling Note that this mode replaces the original 20 second mode in the STS 1 Feedback Electronics boxes In nearly all respects a 10 second operating model is preferable for installation and setup as it has faster settling transients In that the vast majority of STS 1 users operate in 360 second mode and not 20 second mode elimination of a 20 second mode is acceptable E360 N360 and Z360 will change the sensors low frequency corner back to 360 seconds normal operating mode EUNDAMP NUNDAMP and ZUNDAMP will remove damping from the E N and Z sensors EDAMP NDAMP and ZDAMP will restore damping normal operating mode With the M2166 EM users will want enter 10 second mode and will remove
58. tem turns ON relay control power within the module required to energize the relays used temporarily within the other operating modes and it provides software access to the other menus Entering DISABLE will remove relay power and will block software access to the other menus M2166 VBB User s Manual Rev 4 01 January 2015 51 of 65 Entering SAFE at any time and from any other menu will also remove relay power It will return the user to the MAIN menu and block access to the other menus until the system is re enabled Within any menu there is also an activity timer that keeps track of the number of seconds since the last command has been entered After 3600 seconds 1 hour without a command the system enters SAFE mode 3600 seconds is sufficient for even the most time consuming operations e g various calibration seguences to be performed SAFE mode is designed to provide two levels of safety First by removing power from the many relays used within the module to enable connections to the sensor for various control and diagnostic functions the system CANNOT inadvertently actuate any of these relays This will prevent the sensors from being placed into an undesired operating mode or allow an electrical connection that might introduce noise Second by reguiring an explicit ENABLE command to be entered the system is further protected from unintended commands being able to control the operation of the module Entering
59. terminated on both ends with Souriau 851 series plugs one with a 26 pin plug and the other with a 26 socket version The package plug uses a unigue connector body ET version that simplifies attachment in tight locations Three SENSOR cables one per sensor ax1s are used with the system One end attaches to one of the SENSOR connectors on the electronics module the other end mates with the hermetic bulkhead receptacle that is installed on the aluminum rings of the M2166 VBB TSP The cable polyurethane jacketed consists of 13 twisted pairs of 28 AWG stranded wire 7 strands There is a single shield drain wire that is tied to the body of the connector on the inbound side only electronics module side The shield drain are NOT redundantly connected to the body of the outbound plug The SENSOR signals are grouped into pairs in such a way to provide the maximum level of common mode rejection and the minimum level of crosstalk The details of the SENSOR cable are listed in Table 7 ii SIGNAL Cable WHITE This is a 24 conductor cable that is terminated on both ends with a Souriau 851 series plugs 851 06E16 26S50 44 on INBOUND end and 851 06E16 26P50 44 on OUTBOUND end that attaches to the CHA SIGNAL connector on the electronics module The other end is terminated with a Souriau 851 06EC16 26P50 plug that attaches to CHA of a Ouanterra Q330HR recorder This cable can be used for the M2166 EM CHA output to 0330 CHA input and the M2166 EM CHB output
60. their digitizer in order to obtain optimum control of the electronics module Because of the pull up resistor both standard logic gates and open drain drivers can be used Note also that the optional STS1 PTM1 module provides both a mechanical switch and a fully isolated active HIGH digital input for generating the digital RESET See the STS1 PTM1 User s Manual for details M2166 VBB User s Manual Rev 4 01 January 2015 50 of 65 Control of Sensor Via 0330 Recorder The M2166 EM module allows remote initiation of AUTOCENTER CAL and 10 SECOND modes An AUTOCENTER seguence will center all three axes The CAL seguence will drive the sensors in velocity eguivalent mode using the calibration source stimulus supplied by the 0330 The 10 SECOND mode will put the sensor into a short period setup mode Either mode is enabled by asserting its digital control line AUTOCENTER ENABLE CAL ENABLE or GENEN 3A Pin S in the CH A connector All commands require a minimum assertion time of 3 seconds The AUTOCENTER operation will run to its conclusion The CAL and 10 SECOND modes will run until their respective control line is de asserted M2166 EM Command Software Control of the M2166 EM is via a menu drive command structure The commands are NOT case sensitive At power up the system enters the MAIN menu This is predominantly a gateway to four other menus SENSOR MOTOR CALIBRATE DIAGNOSTIC The complete list of commands available by t
61. to secure the cap The screws can be finger tight See Figure 14 for clarification M2166 VBB User s Manual Rev 4 01 January 2015 43 of 65 6 Repeat the same procedure with the N STS1 HSM module In this case the sensor axis board should face toward the back of the package Figure 15 shows a system in which both horizontal sensors are installed Figure 12 STS1 VSM vertical sensor installed into the Z mounting position of the package The ribbon cable has been attached M2166 VBB User s Manual Rev 4 01 January 2015 44 of 65 Figure 13 Vertical sensor with magnetic shield installed The shield should be firmly inserted into the low profile magnetic cap that surrounds the red wiring board It is important that the shield is installed fully and is aligned with the sealing ring This will prevent it touching the inside of the aluminum pressure can Avoiding contact of these two pieces is advised M2166 VBB User s Manual Rev 4 01 January 2015 45 of 65 Figure 14 STS1 HSM horizontal sensor installed into E sensor mounting position The ribbon cable has been attached Note that the sensitive axis Indicated by the arrow on the top of the sensor is meant to point in the E direction M2166 VBB User s Manual Rev 4 01 January 2015 46 of 65 Figure 15 STS1 HSM horizontal sensors installed into both mounting positions The ribbon cables have been attached The N sensor s locking pins are still in place Note that the sensitive
62. utocenter of each sensor via assertion of AUTOCENTER ENABLE line from digitizer Assert line for at least 3 seconds yellow LED indicator when enabled Calibration Functions Via serial command strings Direct connection of external signals to sensor CAL coils Signal conditioning circuitry for converting raw CAL signals into acceleration or velocity equivalent stimuli External input of remote CAL signals into signal conditioning circuit Internal generation of CAL signals via 16 bit DAC Internally generated step sine sweep and sine 0 01 Hz 0 1 Hz and 1 Hz Optional Auto CAL function CAL Stimulus connected to E SIGNAL connector E or N sensor output connected to N SIGNAL connector Z sensor output connected to Z SIGNAL connector Via Digitizer Digitizer supplied calibration stimulus injected into sensor calibration coil in velocity equivalent mode via assertion of CAL ENABLE line from digitizer green LED indicator when enabled M2166 VBB User s Manual Rev 4 01 January 2015 34 of 65 Diagnostic Functions Diagnostic Functions continued Fail Safe Mode Native Command Interface Connector Names quantity and Functions Connector Types Input Power Physical Via serial command strings Digitization of internal signals via 24 bit ADC remote diagnostics Connection of internal signals to analog differential output lines local diagnostics Signals Monitored E N Z BRB E N Z LP E N Z Boom Position E N Z
63. verter Approximate 5W total consumption Package Size 13 75 W x 7 25 H x 15 D Weight 30 pounds M2166 VBB User s Manual Rev 4 01 January 2015 35 of65 M2166 TSP Triaxial Sensor Package Specifications Sensor Module Mounting Double sided ground nickel plated aluminum plates for sensor mounting Mounting reference planes are parallel to baseplate surface within 300 micro radians Horizontal sensor plates contain alignment block for accurate control of sensor rotation Package Alignment Aids Edges of baseplate are aligned with E and N direction to within 5 mrad Baseplate edges are clearly marked as E gt gt gt gt and N gt gt gt gt Bull s eye level for tip tilt alignment Internal Sensor Mounting Relative azimuth alignment of horizontal sensors Plate Alignment Accuracy 5 mrad Tip Tilt 500 micro radians between surface normal and local gravit Global Composite 5 mrad between horizontal sensor axes and azimuth alignment Alignment fixture Accurac 1 mrad between vertical sensor axis and local gravit Axis Non orthogonalit Under 5 mrad Carrying Handles Three handles on periphery of package SENSOR Cable 3 of 851 hermetic bulkhead receptacles on package sealing rings Connections 851 07A16 26P50 A7 44 EP Sensor Wiring Boards Two 2 Blue colored boards for horizontal sensors One 1 Red colored board for vertical sensor Boards contain through holes for sensor mounting feet and ribbon cable
64. vironment This is important to eliminate the effects of long term exposure to atmospheric humidity of the sensor element The aluminum pressure cans also provide an integral electrostatic shield to the sensors An important component of the electrostatic control system is a set of spring loaded locking screws for ensuring electrical connectivity between each pressure can and the rest of the baseplate This is shown in Figure 3A Figure 3B shows an optional grounding point to the package The package is evacuated via a pumping port shown in Figure 3C A vacuum valve seals the package and the quick disconnect port blue colored McMaster Carr 86361133 provides a redundant vacuum seal when its removable gland is not in inserted A mechanical pressure gauge is used to monitor vacuum level within the system There are three sensor mounting areas one sensor per pressure housing Each contains an integrated wiring board color coded blue for horizontal sensors and red for the vertical sensor These are shown in Figure 4 The boards provide holes through which the sensor feet are inserted during installation Each has an integrated ribbon cable for electrical connection to the sensor module Each mounting area also contains a sensor mounting plate below the wiring board that provides a stable flat surface for sensor placement The Rev 4 01 package eliminates the use of kinematic supports for precision azimuth alignment Rather a red colored alignment tool
65. xis Typically the maximum amount of leveling reguired to center the boom i e zero the horizontal force on the boom is under 500 micro radians assuming that the sensor is installed in a suitably leveled baseplate This micro tilting of the sensor does not affect the orthogonality of the triaxial sensor system in a significant way The M2166 HSM has a similar integrated mechanical shield that protects the sensor elements during shipment and handling Electrical connection to the sensor is made via the same 2mm shrouded ejector header that is used with the vertical sensor The horizontal sensor also sits on three leveling feet that have been carefully set and locked during manufacturing There is no reason to adjust the feet during normal operation Similarly as there are no user serviced parts in the sensor there is no reason to open the mechanical shield The M2166 HSM locking method and installation removal order is similar to that of the vertical sensor However the brass locking screws are unique to the horizontal sensor and they are marked HL long screws installed on opposite sides of the sensor and HS short screws installed at the end of the sensor boom Figure 10 shows the horizontal sensor module with the locking screws installed for shipment and removed for operation M2166 VBB User s Manual Rev 4 01 January 2015 22 of 65 metrozet NMK A Horizontal sensor module with locking screws installed M2166 HSM
66. yping followed by Enter are MAIN Menu Commands SENSOR Selects Sensor Control Menu OTOR Selects Motor Control Menu CALIBRATE Selects Calibration Control Menu DIAGNOSTIC Selects Diagnostic Control Menu SAFE Puts System Into Default Analog Measurement Mod ENABLE Enable System Control is Password DISABLE Disable System Control STATUS Print system status info Help for info on specific command Within the MAIN menu the sensor is in SAFE mode In this mode the system operates as a purely analog sensor All connections to the various diagnostic and control systems in the module are broken In SAFE mode the system operates exactly as the original Streckeisen Feeback Electronics would Note that physical connection to the sensor s CAL coils is also broken in SAFE mode In this way the sensor is probably better isolated than with the original electronics SAFE mode will be the normal recording mode for the sensor Other operating modes accessed via the SENSOR MOTOR CALIBRATE and DIAGNOSTIC menus are meant to be temporary and they can only be accessed once control of the system is enabled The ENABLE command where is a six character password must be entered to allow access to these other menus In Rev 4 00 of the electronics module the password is abcdef One enters enableabcdef to enable the system Once enabled the sys

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