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STS1-E300 User`s Manual

1. boom position signal output levels motor switch state electronics temperature and a number of auxiliary analog and digital input lines All of the control and diagnostic functions can be controlled locally via RS 232 USB or Ethernet or remotely via Ethernet In addition the STS1 E300 provides a complete calibration capability that includes on board generation of velocity or acceleration equivalent test signals step swept sine and fixed frequency sine as well as automatic switching of calibration test signals into the standard output signal connectors Auto CAL The latter feature eliminates the need for a separate calibration signal recording channel thus allowing recording of transfer function measurement data stimulus and response from triaxial sensors within a three channel data acquisition system The system also maintains the existing capability for injection of user generated external calibration signals into the system through a dedicated connector All of the control diagnostic and calibration features are implemented in an ultra reliable fail safe manner The system is automatically re configured to operate as a strictly analog sensor following power on reset or after a pre determined time without an external command The STS 1 E300 provides the capability for operation and control of three STS 1 sensors Single and dual axis versions are also available This new module improves greatly on packa
2. protection and fusing available with Metrozet s External Power and Telemetry Module STS1 PTM1 Power Stabilization Automatic load current stabilization circuit provides for constant power dissipation within the package Use of power stabilization is optional Physical Package Size 12 6 x 12 6 x 4 8 32 cm x 32 cm x 12 2 cm Weight 17 pounds 7 7 kg STS1 E300 User s Manual Rev 1 20 14 of 31 Module Interchangeability and Scale Factor Conversion The STS 1 E300 is designed and manufactured to provide identical performance from module to module Specifically the feedback components are carefully trimmed to a uniformity of under 1 This allows STS1 E300 modules to be interchanged without significantly affecting the sensor s response either its scalar responsivity or its frequency response This uniformity is intended to simplify long term maintenance of the sensors However due to siginificant variations in the original manufacturing process by Streckesien the scalar responsivity V m sec at the BRB output and V gal at the LP output of any given mechanical sensor mated with the STS1 E300 will exhibit some variation from the nominal 2400 V m sec BRB and 80 V gal LP that Streckeisen attempted to provide In fact there will be a systemic bias related to the orientation of the sensor vertical sensors will have a higher scalar responsivity and horizontal sensors will have a lower responsi
3. 05 AmplitudeSignal Volts 0 05 0 10 1 I 1 1 1 1 1 1 1 499 0 499 2 499 4 499 6 499 8 500 0 500 2 500 4 500 6 500 8 501 0 Time Seconds Figure 4 Velocity Equivalent STEP Response This is recorded data Top panel is stimulus signal from internal STEP 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 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 H2 STS1 E300 User s Manual Rev 1 20 27 of 31 SWEEP Stimulus 8 00 4 00 2 00 2 00 g A T 2 3 3 lt SWEEP Response 0 30 o 0 10 D gt S 5 5 o 00 a T a lt 0 20 0 10 SWEEP Response Zommed to Stepped Sine Portion 0 12 0 10 0 08 0 06 0 04 0 02 0 00 eSignal Volts Amplitud Spo PRE 0 10 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 v
4. E32620A Dual output 1A however many commercial power supplies will suffice Note that Metrozet s External Power and Telemetry Module STS1 PTM1 contains an internal power supply that will convert unregulated input power 10 33V DC into well regulated 15V for use with the STS1 E300 With the power supply turned OFF connect the COMNTROL cable to the STS1 E300 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 STS 1 mechanical sensors and the STS 1 E300 module s SENSOR connectors In a normal triaxial application the two horizontal sensors should be connected to the E and N channels 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 STS1 E300 module and the recording system Turn on the power supply The quiescent current draw should be approximately 160 mA 145 mA at 15V if the power stabilization is not enabled With power stabilization enabled the quiescent current draw should be 250 mA Note power stabilization is an optional feature set by factory installed jumpers that provides a constant current and hence power c
5. Motor Switch Input 10 MSW Motor Switch Input 11 MOT Motor Drive Output 12 MOT Motor Drive Output 13 CAL Calibration Coil Output 14 CAL Calibration Coil Output 15 CASE_GND Case Ground Input Output 16 CASE_GND Case Ground Input Output 17 NC Unused 18 NC Unused 19 NC Unused 20 NC Unused 21 NC Unused 22 NC Unused 23 NC Unused 24 NC Unused 25 NC Unused 26 NC Unused 27 NC Unused Table 1 SENSOR Connectors pinout description There are separate connections for E N and Z sensors The connector is Fischer DBPE105Z102 130 Under normal operation these signals are not accessed by the user directly Pin Name Description Input Output 1 BRB Broad Band Velocity Output 2 BRB Broad Band Velocity Output 3 LP Long Period Acceleration Output 4 LP Long Period Acceleration Output 5 ANALOG_GND Analog Ground Reference for Signals Input Output 6 BOOM_POSITION Boom Output 7 CASE_GND Case Ground Input Output 8 CASE_GND Case Ground Input Output 9 NC Unused 10 NC Unused Table 2 SIGNAL Connectors pinout description There are separate connections for E N and Z sensors The connector is Fischer DBPE105A062 130 Nominal full scale output ranges for BRB LP and BOOM_POSITION are 11 5V 23V differential BRB and LP are fully differential outputs with a common mode reference voltage defined by ANALOG_GND BOOM_POSITION is a single ended sign
6. 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 STS1 E300 User s Manual Rev 1 20 24 of 31 Note Regarding CAL signal Polarity Within the passband of the sensor the response of a VERTICAL STS 1 sensor with the STS1 E300 module will be in phase with the CAL stimulus signal The HORIZONTAL sensor s response will be 180 degrees out of phase This is consistent with the operation of the original sensors It is a consequence of the design of the STS 1 sensor and the decision to provide equivalent channels in each electronics module The user will need to note this difference within their own data systems Frequency Response Analysis The major reason for any calibration sequence is to measure or validate the frequency response of a sensor There are a number of possible methods for analyzing recorded stimulus response data in order to determine the frequency response poles zeros Metrozet is currently developing a modern software applet STS 1 CALE
7. make to the electronics and there are no parts that can be user serviced Opening the module and or altering the tamper indicating seal without prior approval of Metrozet will void the product s warranty 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 requirements for electrical safety STS1 E300 User s Manual Rev 1 20 3 of 31 Introduction and Instrument Description Metrozet s STS1 E300 is an advanced electronics package that provides a modern replacement for the original Streckeisen Feedback Electronics boxes It matches the outstanding analog performance of the existing circuitry while providing a number of enhancements that make installation and operation of the sensors more efficient within a modern seismic network These include digital control of all sensor parameters corner frequency and damping with a new 10 second setup mode remote digital control of centering motor operations including a new one step Auto Center capability and a digitally controlled diagnostic function that allows remote monitoring of all major instrument state of health parameters including critical power supply voltages
8. 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 STS1 E300 User s Manual Rev 1 20 22 of 31 the CAL coils of the three sensors This provides for a velocity equivalent 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 equivalent 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 velocity 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 EXTCALAC
9. the digital RESET See the STS1 PTM1 User s Manual for details STS1 E300 User s Manual Rev 1 20 12 of 31 Metrozet STS1 E300 Detailed Specifications Specification Value 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 Frequencies 10 Seconds Setup Nominal Damping 0 707 of critical Analog Output Ranges Approximately 23V Differential for BRB and LP Approximately 11 5V Single Ended for Boom Position Uniformity Exchange of electronics boxes will maintain corner frequency damping and scalar responsivity to within 1 Sensor Control Functions Motor Control Functions Calibration 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 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 Auto Center for each sensor Works seamlessly with both horizontal and vertical STS 1 sensors Via serial command strings Direct connection of external signals to sensor CAL coils Signal conditioning circuitry for convertin
10. 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 STS1 E300 User s Manual Rev 1 20 19 of 31 MOTOR Menu Commands ESW Read E Motor Switch EMOVE Run E Motor in Direction Outputs E Boom Position on ADC OVE Run E Motor in Direction Outputs E Boom Position on ADC SW Read otor Switch OVE Run otor in Direction Outputs Boom Position on ADC OVE Run otor in Direction Outputs 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 BOOMADC Reads Boom Position on ADC ZBOOMADC Reads Z Boom Position on ADC EBOOMCTL Outputs E Boom Position on Control Connector BOOMCTL Outputs Boom Position on Control Connector 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 AUTOCTR Runs Autocenter on Sensor ZAUTOCTR Runs Autocenter on Z Sensor SAFE Puts System Into Default Analog Measurement Mod RE
11. CELERATION 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 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 STS1 E300 User s Manual Rev 1 20 23 of 31 In some cases users may want to record both stimulus and response signals from a triaxial sensor using a reco
12. ENSOR cable connections The wires are grouped by twisted pair STS1 E300 User s Manual Rev 1 20 9 of 31 S105A062 130 Wire Color Name Plug Pin 1 WHITE BRB 2 BLACK BRB 3 WHITE LP 4 BROWN LP 5 WHITE ANALOG _ GND 6 RED BOOM_POSITION 7 WHITE CASE GND 8 ORANGE CASE GND NC 10 NC Table 6 Details of SIGNAL cable connections The wires are grouped by twisted pair S 105Z 038 130 Wire Color Name Plug Pin 1 WHITE 15V 2 BLACK 15V 3 WHITE POWER_GND 4 BROWN DIGITAL_GND 5 WHITE DIGITAL_3_3V 6 RED EXT_RESET 7 WHITE RS232_TX 8 ORANGE RS232_RX WHITE CASE_GND 10 YELLOW CASE_GND 11 WHITE OUTPUT_SIGNAL 12 GREEN OUTPUT_SIGNAL 13 WHITE AUX_ANALOG_0 14 BLUE AUX_ANALOG _1 15 WHITE AUX_DIGITAL_0 16 VIOLET AUX_DIGITAL_1 17 WHITE AUX _ANALOG_ GND 18 GRAY AUX_DIGITAL_GND Table 7 Details of CONTROL cable connections The wires are grouped by twisted pair STS1 E300 User s Manual Rev 1 20 10 of 31 S105Z 062 130 Wire Color Name Plug Pin 1 WHITE CAL_IN 2 BLACK CAL_IN 3 WHITE CAL_OUT 4 BROWN CAL_OUT 5 WHITE CAL_GND 6 RED CAL_GND 7 WHITE CASE _GND 8 ORANGE CASE GND NC 10 NC Table 8 Details of CAL cable connections The wires are grouped by twisted pair STS1 E300 User s Manual Rev 1 20 11 of 31 STS1 E300 Communications Communic
13. 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 HHHH command where H is a six character password must be entered to allow access to these other menus In V1 20 of the electronics module the password is abcdef One enters enableabcdef to enable the system Once enabled the system 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 t
14. STS 1 Very Broadband Seismometer Electronics STS1 E300 User s Manual Version 1 20 hne gt nrozei Metrozet LLC 21143 Hawthorne Blvd 456 Torrance CA 90503 866 823 0339 www metrozet com Copyright 2008 STS1 E300 User s Manual Rev 1 20 1 of 31 Table of Contents No User Serviced Parts Electrical Safety Notice sccssccsscccsccesscccscees p 3 Introduction and Instrument Description cccccccccsccccccscccccsscccesecs p 4 STS1 E300 Package and Connections ccccccssccsccccscccsccccssccsscesscees pp 5 7 STS1 E300 Cabling ssssscsscssccecesosscsscosossosssssossssscsecosossesssssosoos pp 8 11 STS1 E300 ComMunlications 2 sccsccscsscesscscesecsseesssesavessessssnessvsecsveseseeesae p 12 STS1 E300 SpechiCauOns scssscssecespecscseossscpesdessessecpesseesesectpeesceseeseepecesesessses pp 13 14 Module Interchangeability and Scale Factor Conversion scssccssccsscccssceees p 15 OPEC ANON sicarsaaseccaqawaretmenedaswsanaeasrasereeneectiae canes entender eae pp 16 STS1 E300 Command SoM war Gixssiscacessdsnsascnsnascuvexeccerseiineyvewasancsvasswssnsscass p 17 30 Contact Metrozelsicccsszcdcndeviendsuceussevenscedeudaecewscedawsssncesdedsntadtewesedeuseeessonss p 31 Visit www metrozet com for the latest version of this manual STS1 E300 User s Manual Rev 1 20 2 of 31 No User Serviced Parts There is no reason to open the instrument case There are no manual adjustments to
15. TURN 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 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 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 estimat
16. X EW based upon a recursive time domain filtering technique developed and refined by Professor Erhard Wielandt that will automatically analyze recorded data in standard seismic data formats in order to generate the exact poles and zeros of the STS 1 sensor Please contact us for details STS1 E300 User s Manual Rev 1 20 25 of 31 STEP Stimulus 7 00 6 00 s 4 00 3 00 2 00 AmplitudeSignal Volts pa S 1 00 1 1 1 1 750 0 1000 0 1250 0 1500 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 SWEEP Stimulus 8 00 6 00 N TE AmplitudeSignal Volts db 2 p se 8 00 1 1 I 1 1 I 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 Figure 3 Internal SWEEP calibration function This consists of a low frequency sweep and a high frequency stepped sine 0 5 to 40 Hz STS1 E300 User s Manual Rev 1 20 26 of 31 STEP Stimulus 7 00 s 3 AmplitudeSignal Volts KN Ww D 8 1 1 00 1 1 1 1 I I 250 0 500 0 750 0 1000 0 1250 0 1500 STEP Response 0 30 0 20 S 0 10 E 0 00 a g 2 0 10 a 5 0 20 0 30 o STEP Response Zoomed Into Start of Step 0 30 0 25 0 20 0 15 0 10 0
17. al referenced to ANALOG_GND STS1 E300 User s Manual Rev 1 20 6 of 31 Pin Name Description Input Output 1 15V Input Power Input 2 15V Input Power Input 3 POWER_GND Power Supply Ground Return Input Output 4 DIGITAL_GND Digital Ground reference for Digital 3 3V and RS 232 Input Output 5 DIGITAL _3_3V 3 3V Digital Power for use by remote modules Output 6 EXT_RESET Active Low RESET Line for Digital Processor Input 7 RS232_TX RS 232 Transmit line Output 8 RS232_RX RS 232 Receive Line Input 9 CASE_GND Case Ground Input Output 10 CASE_GND Case Ground Input Output 11 OUTPUT_SIGNAL Reference for user selected output signal Output 12 OUTPUT_SIGNAL User selected output signal Output 13 AUX_ANALOG_0 Auxiliary analog input 0 full scale range is 16V Input 14 AUX_ANALOG_1 Auxiliary analog input 1 full scale range is 16V Input 15 AUX_DIGITAL_0 Auxiliary digital input Nominal VIH 3 3V Input maximum is 6V 16 AUX_DIGITAL_1 Auxiliary digital input Nominal VIH 3 3V Input maximum is 6V 17 AUX_ANALOG_GND Reference for AUX_ANALOG_0 and AUX_ANALOG_1 Input 18 AUX_DIGITAL_GND Reference for AUX_DIGITAL_0 and AUX_DIGITAL_1 Input Table 3 CONTROL Connector pinout description The connector is Fischer DBPE105Z038 130 Input power 15V nominal should be within a range of 13V to 16V relative to POWER_GND RS232_TX RS_232_RX and DIGITAL_GND form a fu
18. amped state and restore them to their original configuration when finished The algorithm will attempt to move the boom approximately 1 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 STS1 E300 User s Manual Rev 1 20 21 of 31 CALIBRATE Menu Commands STEP Internal CAL Source Outputs OV 7 5V 0V Step for 100 500 500 Seconds SWEEP Internal CAL Source Outputs LF and HF Sweep for 1382 Seconds 0 01HZSINE 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 Si
19. ation with the STS1 E300 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 Signal Name CONTROL Connector Pin PC COM Port 9 Pin D Connector Pin RS232_TX 7 2 RS232_RX 8 3 DIGITAL_GND 4 5 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 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 Metrozet s External Power and Telemetry Module STS1 PTM1 can be used to convert the RS 232 interface to USB and Ethernet The former will allow local control of the system via a laptop and the latter will allow remote operation within the customer s seismic network Please contact Metrozet for details on thi
20. ed 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 STS1 E300 User s Manual Rev 1 20 20 of 31 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 state that they were in corner frequency 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 d
21. f the selected signal via the on board ADC with 16V range Commands ending in CTL will physically connect the selected signal to STS1 E300 User s Manual Rev 1 20 29 of 31 the OUTPUT_SIGNAL 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 AUXANALOGO 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 i
22. g 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 Diagnostic Functions 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 Motor Limit Switch State Analog Power regulated power used by sensors Input Power Module Temperature via internal temperature sensor STS1 E300 User s Manual Rev 1 20 13 of 31 Diagnostic Functions continued DAC Voltage Auxiliary Analog Input 0 and 1 Auxiliary Digital Input 0 and 1 Fail Safe Mode 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 Native Command Interface Connector Names quantity and Functions RS 232 9600 baud 8 data bits 1 stop bit No par
23. ging relative to the original electronics A fully watertight case along with gastight connectors and cabling is designed to eliminate a number of moisture related effects that have plagued the worldwide fleet of STS 1 sensors Metrozet offers cabling with all critical signals distributed within a twisted pair configuration Specifically Metrozet s hermetic sensor cable which is fully compatible with existing the STS 1 baseplate connector utilizes a twisted pair configuration for all low level differential signals Note that the original non hermetic orange cables from Streckeisen do not Each STS1 E300 module is trimmed to provide identical performance on any given STS 1 mechanical sensor In this way the electronics are interchangeable between sensors The exact scalar responsivity of the sensor can be calculated using the Metrozet STS1Scale Factor Calculator V1 20 software applet that is included with the electronics In short the STS1 E300 provides STS 1 users with an improved and fully supported capability for extending the operating lifetime of the world s highest performance broadband seismometers Please contact Metrozet if you have any specific questions or requirements STS1 E300 User s Manual Rev 1 20 4 of 31 STS1 E300 Package and Connections The STS 1 E300 electronics are housed in a watertight die cast aluminum package The use of fully hermetic connectors Fischer 105 Series gastight bulkhead receptac
24. ibration signals STS1 E300 User s Manual Rev 1 20 7 of 31 STS1 E300 Cabling To maintain fully hermetic gastight performance within the entire system the cabling utilizes the proper sealed mating connectors Fischer Connectors series 105 Metrozet manufactures and sells a number of cables for use with the STS1 E300 Note that the SIGNAL CAL and CONTROL 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 requirements Each cable is color coded with polyolefin lined heat shrink tubing that is applied over the end of its plug s There is also a white identification label that is attached to each cable on the end that is plugged into the STS1 E300 module inbound side SENSOR Cable Part 12010 067 20 ORANGE or YELLOW Color Coding This replaces the original orange sensor cable produced by Streckeisen which was not sealed One end of this 20 long cable is terminated with a Fischer 105Z102 130 plug that attaches to one of the SENSOR connectors on the electronics module The other end is terminated with a Fischer 105A038 130 plug which mates with the standard bulkhead receptacle Fischer 105A038 Series that is used on the aluminum ring of the STS 1 sensor baseplate The cable polyurethane jacketed con
25. iew of the response during the stepped sine portion of the calibration STS1 E300 User s Manual Rev 1 20 28 of 31 DIAGNOSTIC Menu Commands wW RB ADC Read RB ADC Read iP ADC Read E LP on ADC iP ADC Read E LP on ADC BOOMADC Reads E Boom Position on ADC RB ADC Read N BRB on ADC RB ADC Read N BRB on ADC LP ADC Read N LP on ADC LP ADC Read N LP on ADC BOOMADC Reads N Boom Position on ADC ZBRB ADC Read Z BRB on ADC RB ADC Read Z BRB on ADC LP ADC Read Z LP on ADC LP ADC Read Z LP on ADC BOOMADC Reads Z Boom Position 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 D P BRB on ADC BRB on ADC Hee w wi m ry a w m B B N wW we UTPWR ADC Read Input Power on ADC UTPWR ADC Read Input Power on ADC PERATUREADC 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 iP CTL Outputs E LP on Control Connector ELP CTL Outputs E LP on Control Connector EBOOMCTL Outputs E Boom Position on Control Connector BRB CTL Outputs BRB on Control Connector BRB CTL Outputs BRB on Control Connector LP CTL Outputs N LP on C
26. ity Full duplex no hardware handshaking SIGNAL 3 Individual signal output connectors for E N and Z sensors Differential BRB and LP signals Single ended boom position SENSOR 3 Individual connectors for each sensor Analog sensor signals digital motor control signals and CAL coil signals CAL 1 Differential external calibration signal inputs and internal calibration signal outputs CONTROL 1 Power inputs RS 232 analog output of selected internal signals Auxiliary analog inputs and auxiliary digital inputs Connector Types All are Fischer Connectors Series DBPE105 fully hermetic bulkhead receptacles SIGNAL DBPE105A062 130 10 contact SENSOR DBPE105Z102 130 27 contact CAL DBPE105Z062 130 10 contact CONTROL DBPE105Z038 130 18 contact Standard Cabling SIGNAL S105A062 130 on polyurethane cable 4 twisted pairs with shield pigtailed SENSOR 105Z102 130 on polyurethane cable 8 twisted pairs with shield terminated with 105A038 130 standard baseplate connector on STS 1 CAL 105Z062 130 on polyurethane cable 4 twisted pairs with shield pigtailed CONTROL S 105Z038 130 on polyurethane cable 9 twisted pairs with shield pigtailed Standard cable length 20 feet Input Power 15V nominal 13V to 16V Limits 250 mA nominal with power stabilization enabled 160 145 mA nominal without power stabilization enabled 10 33V input reverse polarity protection overvoltage
27. les and cable plugs provides a significant improvement over the non hermetic packaging used in the original Streckeisen boxes and cabling Figure 1 shows a drawing of the STS1 E300 package with the individual connectors clearly labeled Tables 1 through 4 provide a pin by pin description of each connector STS 1 VERY BROADBAND SEISMOMETER ELECTRONICS STS1 E300 metrozet www metrozet com SIN STS1 E300 10 003 Figure 1 STS1 E300 Package Note that the three axes are labeled E N and Z in keeping with one popular naming convention for seismic sensor axes This convention is maintained throughout the entire system including the software commands described below This is however simply a naming convention There is nothing that prevents for example one from using three vertical sensors with the STS1 E300 module Although all three axes would be Z axes in this case the user would still refer to them as E N and Z in using the module and its software STS1 E300 User s Manual Rev 1 20 5 of 31 Pin Name Description Input Output 1 PDFB Proportional Differential Feedback Output 2 PDFB Proportional Differential Feedback Output 3 IFB Integral Feedback Output 4 IFB Integral Feedback Output 5 DEM Demodulator Input 6 DEM Demodulator Input 7 OSC Oscillator Output 8 OSC Oscillator Output 9 MSW
28. ll duplex RS 232 link ETA TIA 232 without hardware handshaking Most internal signals can be output on OUTPUT_SIGNAL 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 Pin Name Description Input Output 1 CAL_IN External Calibration Input Input 2 CAL_IN External Calibration Input Input 3 CAL_OUT Calibration Drive Signal Output Output 4 CAL_OUT Calibration Drive Signal Output Output 5 CAL_GND Ground reference for CAL_IN and CAL_OUT Input Output 6 CAL_GND Ground reference for CAL_IN and CAL_OUT Input Output 7 CASE_GND Case Ground Input Output 8 CASE_GND Case Ground Input Output 9 NC Unused 10 NC Unused Table 4 CAL Connector pinout description The connector is Fischer DBPE105Z062 130 CAL_IN allows external calibration signals to be injected into the electronics As discussed below these can be conditioned to generate velocity or acceleration equivalent calibration signals or they can be directly connected into the sensors calibration coils The calibration drive signal can be connected to the CAL_OUT connections to allow external monitoring recording of the calibration stimulus CAL_GND provides a common mode reference voltage for all of the cal
29. n the vault SAFE disconnects all signals from the diagnostic system and from the OUTPUT_SIGNAL 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 STS1 E300 User s Manual Rev 1 20 30 of 31 Contact Metrozet If there are any questions problems or further needs regarding the STS1 E300 Electronics please contact us Metrozet 21143 Hawthorne Blvd 456 Torrance CA 90503 866 823 0339 support metrozet com www metrozet com STS1 E300 User s Manual Rev 1 20 31 of 31
30. ne for 100 Seconds EXTCALCONNECT External CAL Input Attached Directly to E N Z CAL Coils EXTCALVELOCITY External CAL Input 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 INTCALDISCONNECT Internal CAL Source Disconnected from E N Z CAL Coils EZSIGNALOUT 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 DEFAULTSIGNALOUT Restore Default SIGNAL Connections EXTCALOUT External CAL Input Drive Signal Connected to CAL Output INTCALOUT Internal CAL Source Drive Signal Connected to CAL Output DISCCALOUT CAL Source Disconnected from CAL Output 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 STEP and SWEEP initiate an internal digital to analog converter DAC to gene
31. nnected 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 STS1 E300 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 STS1 E300 User s Manual Rev 1 20 18 of 31 SENSOR Menu Commands E10 Set E Sensor to 10 Second Mode E360 Set E Sensor to 360 Second Mode EDAMP Engage E Sensor Damping DAMP Remove E Sensor Damping 0 Set N Sensor to 10 Second Mode 60 Set N Sensor to 360 Second Mode AMP Engage N Sensor Damping DAMP Remove N Sensor Damping 0 Set Z Sensor to 10 Second Mode 60 Set Z Sensor to 360 Second Mode AMP Engage Z Sensor Damping UNDAMP Remove Z Sensor Damping EFAULT Restores All Sensors t
32. o 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 VDNNUNNNN 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 STS1 E300 users will want enter 10 second mode and will remove 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
33. o the other menus 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 sequences to be performed STS1 E300 User s Manual Rev 1 20 17 of 31 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 requiring 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 SAFE mode also causes the STS 1 E300 processor to re calibrate its internal RS 232 baud rate generator If the STS1 E300 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 co
34. of 9 twisted pairs of 24 AWG stranded wire 7 strands 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 7 Note that Metrozet also provides a version of the CONTROL cable that is terminated on both ends This cable Part 12010 061 20 is used STS1 E300 User s Manual Rev 1 20 8 of 31 with the optional STS1 PTM1 Power and Telemetry Module This dual cable connects the shield drain to body of only the inbound connector CAL Cable Part 12010 065 20 GREEN Color Coding This is a 20 long pigtailed cable that is terminated on one end with a Fischer S105Z067 130 plug that attaches to the CAL connectors on the electronics module The other end is left bare 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 connector The details of the CAL cable are listed in Table 8 S105Z102 130 Wire Color Name S105A 038 130 Plug Inbound Outbound Pin Pin 1 WHITE PDFB 9 2 BLACK PDFB 10 3 WHITE IFB 13 4 BROWN IFB 12 5 WHITE DEM 6 6 RED DEM 7 7 WHITE OSC 5 8 ORANGE OSC 4 9 WHITE MSW 1 10 YELLOW MSW 11 11 WHITE MOT 3 12 GREEN MOT 2 13 WHITE CAL 14 14 BLUE CAL 15 15 WHITE CASE_GND 16 VIOLET CASE_GND 17 Table 5 Details of S
35. onsumption within the STS1 E300 module regardless of dynamic signals The power stabilization maintains a nominal current draw of 250 mA at 15V This is exclusive of any current consumed by relays which are energized only during setup calibration and centering motor control and not during normal operation In V1 20 the default is for power stabilization NOT to be enabled Please contact Metrozet for details on how to enable it Observe that the command prompt STS 1 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 is now operational Note Turn OFF power from the system before connecting or disconnecting any cable from the STS1 E300 module STS1 E300 User s Manual Rev 1 20 16 of 31 STS1 E300 Command Software Control of the STS1 E300 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 typing followed by Enter are MAIN Menu Commands SENSOR Selects Sensor Control Menu MOTOR Selects Motor Control Menu CALIBRATE Selects Calibration Control Menu DIAGNOSTIC Selects Diagnostic Control Menu SAFE Puts System Into Default Analog Measurement
36. ontrol Connector LP CTL Outputs N LP on Control Connector BOOMCTL Outputs Boom Position on Control Connector ZBRB CTL Outputs Z BRB on Control Connector RB CTL Outputs Z BRB on Control Connector LP CTL Outputs Z LP on Control Connector LP CTL Outputs Z LP on Control Connector BOOMCTL Outputs Z Boom Position on Control Connector UXANALOGOCTL Outputs AUX 0 Input on Control Connector UXANALOGICTL Outputs AUX 1 Input on Control Connector ACCTL Outputs DAC Voltage on Control Connector LOGPWR CTL Outputs Analog Power on Control Connector LOGPWR CTL Outputs Analog Power on Control Connector UTPWR CTL Outputs Input Power on Control Connector UTPWR 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 z T C j P PHHHPPOUOUPPNNN wW w c T T B5B oOo ttt t ad N w FEE TTET H 2 DDPUDPPNNN zZ Z UUD D 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 o
37. rate 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 0V 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 0OOHZSINE 0 1O0HZSINE 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 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
38. rding 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 calibration 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_OUT lines STATUS will report the current connections within the calibration hardware The SAFE command will disconnect the sensor CAL coils from
39. s module The STS 1 E300 recognizes backspace characters as entered through many terminal emulators such as HyperTerminal 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 STS1 E300 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 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
40. sists of 8 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 only on the 105Z102 130 plug The shield drain are NOT redundantly connected to the body of the outbound plug S105A038 130 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 Note that the original orange cables did not use twisted pairs The details of the SENSOR cable are listed in Table 5 Note that on some early cable shipments a yellow colored boot has been used instead of an orange boot The two cables are identical SIGNAL Cable Part 12010 063 20 WHITE Color Coding This is a 20 long pigtailed cable that is terminated on one end with a Fischer 105A062 130 plug that attaches to the SIGNAL connectors on the electronics module The other end is left bare 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 connector The details of the SIGNAL cable are listed in Table 6 CONTROL Cable Part 12010 060 20 BLUE Color Coding This is a 20 long pigtailed cable that is terminated on one end with a Fischer S105Z038 130 plug that attaches to the CONTROL connector on the electronics module The other end is left bare The cable polyurethane jacketed consists
41. vity Fortunately the exact scalar responsivity of any sensor connected to the STS 1 E300 can be accurately determined without further physical measurement Using an applet Metrozet STS 1Scale Factor Calculator V1 20 the operator can determine the scalar responsivity of any sensor given the original factory Seismometer Calibration Sheet values This software applet is shipped with the electronics module It is also available for download from www metrozet com Run the setup file to install this applet to any Windows PC Note that the expected variation in frequency response specifically the low corner frequency and its damping ratio caused by the new electronics is quite small In any event the exact frequency response poles and zeros for any sensor can be determined easily given the extensive calibration capabilities provided within the STS1 E300 module STS1 E300 User s Manual Rev 1 20 15 of 31 Operation Operating the STS 1 E300 involves a few simple steps 1 Connect the 15V 15V POWER_GND wires in the CONTROL cable to a high quality regulated power supply capable of providing at least 0 5A 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

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