1. Manuals
  2. Brands
  3. Kinemetrics Manuals
  4. Measuring Instruments
  5. EpiSensor2
  6. User manual

Kinemetrics EpiSensor2 User Manual

Strong motion accelerometer
Hide thumbs Also See for EpiSensor2:
Table of Contents

Advertisement

Quick Links

Download this manual
K
I
N
E
M
E
T
R
I
C
S
,
I
n
c
.
K
I
N
E
M
E
T
R
I
C
S
,
I
n
c
.
EpiSensor2
Strong Motion Accelerometer
User Manual
Document 305801
Revision A
August 2015

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the EpiSensor2 and is the answer not in the manual?

Questions and answers

Related Manuals for Kinemetrics EpiSensor2

Summary of Contents for Kinemetrics EpiSensor2

  • Page 1 EpiSensor2 Strong Motion Accelerometer User Manual Document 305801 Revision A August 2015...

  • Page 3: Table Of Contents

    Electrical Safety Notice ..........................1 Introduction and Product Description ......................1 Electrical Connections ........................... 2 EpiSensor2 Cabling ............................4 Operational Control of the EpiSensor2 ......................8 Full-Scale Ranges ............................9 Button Pushing ............................9 Digitizer Enable Lines (Q330 used for this description) ................ 9 RS-232 Command Line Interface ......................
  • Page 4 Contact Kinemetrics ..........................18 EpiSensor2 Specifications ........................... 19 Figures Figure 1: EpiSensor2 module........................1 Figure 2: Sensor with standard cable......................5 Figure 3: Standard cable with RS-232 cable connected................5 Figure 4: Pulse-train range signal for +/-4 g range..................10 Figure 5: Details of leveling feet.

  • Page 5: No User-Serviced Parts

    EVISION No User-Serviced Parts The EpiSensor2 is a self-contained seismic accelerometer. There is no reason to open the sensor package, or to modify the electronics or sensor elements contained within it. There are no internal manual adjustments to make, nor are there any user-serviced parts within the sensor. Opening and/or modifying the sensor is unnecessary, and doing so will void the instrument's warranty.

  • Page 7: Introduction And Product Description

    This allows an on-site user to select sensor full- scale range and AUTOZERO state (ON or OFF). An important feature of the EpiSensor2 is its very low quiescent power consumption: under 350 mW. The sensor consumes 60% to 70% lower power than competing strong motion accelerometers.

  • Page 8: Electrical Connections

    305801, R ENSOR ANUAL OCUMENT EVISION Electrical Connections The EpiSensor2 contains a Souriau connector on its side. The connections supported by this receptacle are shown in Table 1. 851-07C16-26P50-A7-44 Receptacle Signal Notes Pin Designator Z Acceleration + Z Acceleration -...

  • Page 9: Table 1: Connections To Sensor Through Souriau 851-07C16-26P50-A7-44 Receptacle

    305801, R ENSOR ANUAL OCUMENT EVISION CAL Enable Line (Logic Level) AUTOZERO Enable Line (Logic Level) RESET Enable Line (Logic Level) RANGE Enable Line (Logic Level) Enable Return CAL Input + CAL Input - RS-232 TX RS-232 RX RS-232 GND Power Bundle Shield/CASE Ground Input Power + (9-36V) Input Power Return...

  • Page 10: Episensor2 Cabling

    EpiSensor2 Cabling The standard cable for the EpiSensor2 is shown in Figure 2. This 6 meter long cable (PN: “Epi2.0 320001- 6”) connects to the sensor and to the digitizer. The 10-shell plug in the Y-extension, at the digitizer end, is dedicated to the isolated RS-232 connection.

  • Page 11: Figure 2: Sensor With Standard Cable

    305801, R ENSOR ANUAL OCUMENT EVISION Figure 2: Sensor with standard cable. Figure 3: Standard cable with RS-232 cable connected. Page 5 August 2015...
  • Page 12 305801, R ENSOR ANUAL OCUMENT EVISION Inbound End: Outbound Outbound End: End: Sensor Connector Recorder RS-232 Connector Connector 851-08E16- Conductors Signal 851-06E16- Conductors 851-06E10- Conductors 26S50-44, RA 26P50-44 98S50-44 Plug Plug Plug Wire 1/Pair 1 Z Acceleration + Wire 1/Pair 1 (SB): (SB): White White Wire 2/Pair 1...
  • Page 13 305801, R ENSOR ANUAL OCUMENT EVISION NC; wire Wire 2/Pair 6 NC; wire floats Wire 2/Pair 6 (CB): floats (CB): Green Green Wire 1/Pair 4 ANALOG Ground Wire 1/Pair 4 (SB): (SB): White White NC; wire Wire 2/Pair 4 NC; wire floats Wire 2/Pair 4 (SB): floats (SB): Orange Orange...

  • Page 14: Operational Control Of The Episensor2

    Drain Wire Table 2: Connection details of standard 6 meter cable. Operational Control of the EpiSensor2 The sensor can be controlled in multiple ways: button pushing (local), digitizer enable lines (remote) and RS-232 (local and/or remote). Using either of these, the operator can control the full-scale range, and AUTOZERO state, of the sensor.

  • Page 15: Full-Scale Ranges

    “0.5g” for +/-0.5g ⋅ “0.25g” for +/-0.25g Range Signaling The EpiSensor2 feeds a range-dependent signal into the the low resolution mass position channels of the Q330 or Rock digitizers: 5V (50 counts) for +/-4g range 4V (40 counts) for +/-2g range 3V (30 counts) for +/-1g range 2V (20 counts) for +/-0.5g range...

  • Page 16: Autozero

    ENSOR ANUAL OCUMENT EVISION In addition, the Episensor2 outputs a coded range signal to each of the channels' SIGNAL line: 5 pulses for +/-4g range 4 pulses for +/-2g range 3 pulses for +/-1g range 2 pulses for +/-0.5g range 1 pulse for +/-0.25g range...

  • Page 17: Cal (Calibration)

    EVISION CAL (Calibration) The EpiSensor2 allows the injection of external calibration signals into the sensors. All three axes are excited simultaneously. There is a green LED that is lit when CAL is ENABLED. There are two ways to control the CAL state.

  • Page 18: Operational Details

    305801, R ENSOR ANUAL OCUMENT EVISION Figure 5: Details of leveling feet. Operational Details Choice of Digitizer The instantaneous dynamic range of the sensor is greater than that of any modern seismic digitizer, particularly when operating on the 4g and 2g ranges. 26-bit digitizers (such as the Q330HR) are preferred for utilizing the greatest part of this range.

  • Page 19: Calibration (Cal)

    (“status” command) will return the scalar response values for each element, at the current full-scale range setting. The Episensor2 frequency response can be described well by a simple set of conjugate pole pairs: P1 = -700+/-1250j (radians/second)

  • Page 20: Thermal Isolation

    Thermal Isolation In order to generate the highest quality data (with low noise and drift at low frequency), the EpiSensor2 should be operated in an environment with high thermal stability. At a minimum, the sensor should be covered with a foam box in order to reduce the effects of air flow around it.

  • Page 21: Rs-232 Command Line Interface

    305801, R ENSOR ANUAL OCUMENT EVISION RS-232 Command Line Interface The sensor provides an isolated RS-232 interface operating in a very standard mode: 9600 baud, 8 data bits, 1 start bit, No parity. The interface does not support hardware or software handshaking. Connection within a typical DB9 COM connector is: DB9 Pin RS-232 Line Description...

  • Page 22: Main Page Commands

    Epi2.0 Main Menu:MAIN> The “status” command prompts the system to print out a set of system-related data: Epi2.0 Main Menu:MAIN> status Kinemetrics Episensor2.0 Serial Number 106 Episensor2.0 Connector Board Number: 4035 Episensor2.0 Main Board Number: 2014 Episensor2.0 Top Board Number: 3012 Episensor2.0 MSP430 Code Revision 3.02.00...

  • Page 23: Password Protection

    305801, R ENSOR ANUAL OCUMENT EVISION Password Protection The system must be enabled to allow access to other menus. The enable command is “enable12345”. Operate Page Commands Epi2.0 Operate Menu:OPERATE> ? Commands: 4G: Sets Sensors to 4g FS Range 2G: Sets Sensors to 2g FS Range 1G: Sets Sensors to 1g FS Range 0.5G: Sets Sensors to 0.5g FS Range 0.25G: Sets Sensors to 0.25g FS Range...

  • Page 24: Response Page Commands

    “Ticks” are a sub-second measure approximately equal to 1 msec. Shipping and Handling While it is called a “strong motion” accelerometer, the EpiSensor2 is still a precision instrument that should be handled with care. Avoid strong shocks during shipment and installation. It is recommended that customers utilize the original foam-filled packaging during any shipment and transport.

  • Page 25: Episensor2 Specifications

    EpiSensor2 Specifications 305801, R ENSOR ANUAL OCUMENT EVISION Architecture: Triaxial, force-balance accelerometer with capacitive displacement transducer; X/Y/Z (non-Galperin) configuration Centering: Optional AUTOZERO mode to allow removal of static sensor offsets (zeroed to within ±0.005 g) Full-scale Range: Electronically (and remotely) selectable range: ±4 g, ±2 g, ±1 g, ±0.5 g, and ±0.25 g (peak)
  • Page 26 305801, R ENSOR ANUAL OCUMENT EVISION Pushbutton Switch and Status LEDs: Local selection and display of full-scale range, AUTOZERO, and CAL status Full-Scale Range Remote Signaling Mass Position Interface: Range-dependent voltage output on traditional broadband sensor mass position lines Signal Line Interface: Time/Amplitude-coded pulse train superimposed on differential signal lines: signaled upon full-scale range change, or upon power-ON reset Electrical Interface Connector: Souriau 851-07C16-26P50-A7-44 Receptacle...

Table of Contents