Reftek REF TEK Colt User Manual
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Reftek REF TEK Colt User Manual

Broadband seismometer
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REF TEK Colt™ Broadband
Seismometer User Guide
117400-XX-UG
Rev D
10/27/2021
This is the product user guide for the 117400-60 and 117400-120 Colt compact broadband
seismometer.
Reftek Systems Inc.
75 MacDonald Avenue, Unit 1
Dartmouth, Nova Scotia
Canada
Support: 1-902-444-0539
Email:
support@reftek.com
www.reftek.com

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  • Page 1 REF TEK Colt™ Broadband Seismometer User Guide 117400-XX-UG Rev D 10/27/2021 This is the product user guide for the 117400-60 and 117400-120 Colt compact broadband seismometer. Reftek Systems Inc. 75 MacDonald Avenue, Unit 1 Dartmouth, Nova Scotia Canada Support: 1-902-444-0539 Email: support@reftek.com...
  • Page 2 Copyright© 2021 Reftek Systems Inc. All rights reserved. No part of this manual may be reproduced, copied or transmitted in any form outside the approved recipient’s organization without written permission from Reftek Systems Inc. Printed in CANADA Reftek Systems Inc.
  • Page 3 Rev D REF TEK Colt™ Broadband Seismometer User Guide 10/27/2021 117400-XX-UG Notation Conventions The following notation conventions are used throughout REF TEK documentation: Notation Description ASCII Indicates the entry conforms to the American Standard Code for Information Interchange definition of character (text) information.
  • Page 4 Rev D REF TEK Colt™ Broadband Seismometer User Guide 10/27/2021 117400-XX-UG https://reftek.com/technical- support support@reftek.com https://manuals.reftek.com Reftek Systems Inc.

  • Page 5: Table Of Contents

    9 Feedback System ......................27 10 REF TEK Colt Transfer Functions ................28 10.1 Transfer Function for the 120 second REF TEK Colt (P/N 117400-120) ......... 28 10.2 Transfer Function for the 60 second REF TEK Colt (P/N 117400-60) ........29 10.3 REF TEK Colt Response Characteristics ..................
  • Page 6 Rev D REF TEK Colt™ Broadband Seismometer User Guide 10/27/2021 117400-XX-UG 11 Packing and Transportation ..................32 11.1 Warranty Statement ........................32 11.2 Warranty/Non-Warranty Service ....................32 Reftek Systems Inc.

  • Page 7: General Description

    The REF TEK Colt’s analog output signals are Z, Y, X orthogonal axis outputs. The Z output is the vertical output. The Y axis output of the REF TEK Colt seismometer is the North-South output and the X axis is the East-West output.

  • Page 8: Sensor Topology

    Colt seismometer. 1.2.1 Sensor Topology The geometry of REF TEK Colt’s output coordinate system is shown below in Figure 1-1. The conversion formula used to convert from the seismometers symmetrical (UVW) orientation to its standard orthogonal (ZYX) output is show in Figure 1-2.

  • Page 9: Specifications

    PT07A14-19S 1.4 Installation, Leveling and Orientation Leveling of the REF TEK Colt is accomplished by using the three adjustable leveling feet at the base of the unit. Once leveled, each leveling foot includes a locknut that should be locked to keep the unit from moving. Before leveling the unit, the unit should be orientated to point North.

  • Page 10: Leveling And Orientation Controls

    North Orientation Marker Orientation Pin Leveling Foot Figure 1-3 REF TEK Colt Orientation and Leveling 1.4.1 Leveling and Orientation Controls See Figure 1-3 for reference. Orientation The orientation pins are used to orientate the seismometer in the North and South direction.

  • Page 11: Ref Tek Colt Pre-Installation

    The REF TEK Colt seismometer should be installed so that it is aligned and orientated North to South. To facilitate this, it is recommended that the user mark a permanent (or semi-permanent) scribe line onto the mounting surface before installing the REF TEK Reftek Systems Inc.

  • Page 12: Unpack The Ref Tek Colt

    Figure 2-2 REF TEK Colt Unpacking 3. The shipping foam which holds the REF TEK Colt upright may come out of the box with the seismometer see Figure 2-3. This is OK. Reftek Systems Inc.
  • Page 13 117400-XX-UG Figure 2-3 REF TEK Colt Unpacking continued 4. Set the REF TEK Colt on a flat, stable surface. If the foam is still on the seismometer, gently pull the foam up and off of the seismometer. Figure 2-4 REF TEK Colt Foam removal NOTE: Keep the seismometer upright as much as possible.

  • Page 14: Installation

    Rev D REF TEK Colt™ Broadband Seismometer User Guide 10/27/2021 117400-XX-UG 3 Installation 3.1 Installation of the Colt NOTE: If you have not already done so, scribe a North-South line on the mounting surface. Perform the following steps to install a Colt: 1.

  • Page 15: Powering Up The Ref Tek Colt

    3.2 Powering up the REF TEK Colt 6. Connect the DAS end of the REF TEK Colt seismometer cable. Be sure your DAS has been configured for use with the REF TEK Colt seismometer. That means that the 4 control lines (Pin K, L, M and U on the sensor’s connector) have been pulled to logic high...
  • Page 16 Rev D REF TEK Colt™ Broadband Seismometer User Guide 10/27/2021 117400-XX-UG 7. After connecting the cable, the seismometer will unlock and center the mass automatically when power is applied. The unlocking procedure will take several seconds and the mass centering procedure will take several minutes.

  • Page 17: Checking Mass Position Voltage Using A Handheld Device

    4 Checking Mass Position Voltage using a handheld device Prior to finalizing the installation, the REF TEK Colt can be checked using iFSC to verify that the REF TEK Colt is functioning properly. See Section 7 to use RTCC to verify the REF TEK Colt.

  • Page 18: User Initiated Centering Operation

    Click Center 4-6 to start sensor centering if the sensor is attached to channels 4-6. 4.2.3 Use the Monitor function The monitor function can be used to check the REF TEK Colt operation with a handheld device. 1. Click the Monitor button to check a particular stream and channel.

  • Page 19: Checking Mass Position Voltage With Rtcc

    Rev D REF TEK Colt™ Broadband Seismometer User Guide 10/27/2021 117400-XX-UG 5 Checking Mass Position Voltage with RTCC 5.1 RTCC Status/Control Screen The Status/Control screen displays all the station status sections. 1. Click the desired Station Status/Control button on the DAS-Discovery page to open the Status/Control page and get details about the selected DAS 130 station.

  • Page 20: Auxiliary Channels

    Rev D REF TEK Colt™ Broadband Seismometer User Guide 10/27/2021 117400-XX-UG 4. The Aux Channels area at the bottom of the display will update to show the mass position voltage output. Figure 5-2 RTCC Status Screen 5.1.2 Auxiliary Channels The auxiliary channels can be used to measure mass position. Three auxiliary channels are provided on each channel connector.

  • Page 21: Rt_Display Example

    Select Group 1-3 -OR- Group 4-6 Figure 5-3 Aux Channels NOTE: The REF TEK Colt mass position outputs have a full scale range of ±10.0 Volts. 5.2 RT_Display Example The real-time seismometer waveforms can be displayed by starting RT_Display. Please see the RT_Display Users Guide, along with the RTPD Installation and Users Guide for more information on viewing real-time waveforms in RT_Display.

  • Page 22: Connector Pinout

    REF TEK Colt™ Broadband Seismometer User Guide 10/27/2021 117400-XX-UG 6 Connector Pinout The REF TEK Colt connector is the PT07A14-19S. The recommended mate connector is an Amphenol PT08SE14-19P. The REF TEK Colt connector pin locations are shown below: Figure 6-1 Colt Connector The pin assignment of the REF TEK Colt output connector is as follows: Reftek Systems Inc.
  • Page 23 Rev D REF TEK Colt™ Broadband Seismometer User Guide 10/27/2021 117400-XX-UG Signal Name Comment Vertical positive signal output (Z+) Differential Output Signal – Vertical Channel Positive output leg Vertical negative signal output (Z-) Differential Output Signal – Vertical Channel Negative output N-S positive signal output (Y+) Differential Output Signal –...

  • Page 24: General Description1

    REF TEK Colt is not outputting ZYX broadband data. During unlocking, locking, and center the REF TEK Colt seismometer output data in a ZYX short period mode. When the Calibration enable signal is activated, the REF TEK Colt outputs UVW broadband data.

  • Page 25: Calibration

    117400-XX-UG 8 Calibration Three in-series calibration coils, one for each component of the REF TEK Colt, are used to examine or test its response. The calibration input signal is isolated from the seismometer calibration coil by a relay that is switched on while the Cal Enable Pin is pulled to ground (activated).

  • Page 26: Example: Sine Wave Calibration

    • Step Interval (sec.): 600 • Step Width (sec.): The step calibration signal causes the REF TEK Colt to output an impulse response as seen in Figure 8-1 and Figure 8-2. Figure 8 1 Calibration Step response Reftek Systems Inc.
  • Page 27 REF TEK Colt. Figure 8-2 Zoom Positive Peak With these calibration parameters, the REF TEK Colt impulse is approximately 6 Volts in amplitude. From the start of the Impulse until the point where the signal crosses below the zero point is approximately 85 seconds.

  • Page 28: Feedback System

    (mass position) and is used in the auto-adjusting control circuit to monitor the mass position. These mass position signals are also wired to the connector of the REF TEK Colt to allow remote monitoring and control by the digitizer.

  • Page 29: Ref Tek Colt Transfer Functions

    10 REF TEK Colt Transfer Functions 10.1 Transfer Function for the 120 second REF TEK Colt (P/N 117400-120) The exact sensitivity of each REF TEK Colt unit is in the test data sheet provided for each individual unit. The transfer function is as follows: K ∙...

  • Page 30: Transfer Function For The 60 Second Ref Tek Colt (P/N 117400-60)

    10/27/2021 117400-XX-UG 10.2 Transfer Function for the 60 second REF TEK Colt (P/N 117400-60) The exact sensitivity of each REF TEK Colt unit is in the test data sheet provided for each individual unit. The transfer function is as follows: K ∙...

  • Page 31: Ref Tek Colt Response Characteristics

    10.3 REF TEK Colt Response Characteristics The following figures show the Magnitude-frequency and Phase-frequency characteristic curves of the REF TEK Colt seismometers, in which the horizontal axis units are Hz, while the vertical ones are dB and degrees respectively. The transfer Function in the low frequency is consistent with that of traditional velocity-output seismometers which have 120 and 60 second natural periods and a 0.707 damping coefficient.

  • Page 32: Amplitude And Phase Characteristics For The 60S Colt

    REF TEK Colt™ Broadband Seismometer User Guide 10/27/2021 117400-XX-UG 10.3.2 Amplitude and Phase Characteristics for the 60s Colt Figure 10-3 Amplitude frequency characteristics of the 60s REF TEK Colt Figure 10-4 Phase frequency characteristics of the 60s REF TEK Colt Reftek Systems Inc.
  • Page 33 2. Disconnect the cable from the top of the REF TEK Colt seismometer. 3. Before shipping the REF TEK Colt be sure to pack the seismometer in the provided shock- absorbing shipping container. 4. Do not place the REF TEK Colt on its side or upside-down when shipping.
  • Page 34 Rev D REF TEK Colt™ Broadband Seismometer User Guide 10/27/2021 117400-XX-UG China RoHS for 120s REF TEK Colt Reftek Systems Inc.
  • Page 35 Rev D REF TEK Colt™ Broadband Seismometer User Guide 10/27/2021 117400-XX-UG China RoHS for 60s REF TEK Colt Reftek Systems Inc.

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