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Crystal Instruments Coco-80 User Manual

Dynamic signal analyzer mode
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Coco-80 User Manual
Dynamic Signal Analyzer Mode
7/23/2012

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Summary of Contents for Crystal Instruments Coco-80

  • Page 1 Coco-80 User Manual Dynamic Signal Analyzer Mode 7/23/2012...

  • Page 2: Table Of Contents

    Save Button ..........................65 Next Trc (Trace) Button ......................65 View Mode Button .........................65 (User) Button .........................65 Recall Button .........................65 Trg (Trigger) On/Off Button ....................66 Sensor Button ........................66 CoCo-80 Startup and Shutdown ....................69 Power on and off the CoCo-80 ....................69...
  • Page 3 CoCo-80 On-Line Updates ....................... 78 CSA — CONFIGURABLE SIGNAL ANALYSIS Preprogrammed CSA projects ....................80 Change CSA projects from the CoCo-80 ................83 Editing CSA from the EDM Software ................... 83 SIGNAL PROCESSING IN THE COCO The Data Processing Flow of CoCo ................... 84 Acquisition Modes ........................
  • Page 4 Configuring the Host PC Network Settings ................. 129 Connect CoCo-80 to a PC directly using USB client ............130 Connect CoCo-80 to a PC directly using Ethernet via crossover cable ....... 130 Connect CoCo-80 to a local network using Ethernet ............130 Connect CoCo-80 to a local network using wireless SD card ..........
  • Page 5 CoCo-80 User Manual MATLAB file ........................135 NI-TDM file.......................... 135 User Defined ASCII file ......................135 .CSV (Microsoft Excel) File ....................135 .WAV File ..........................135 CSA EDITOR OPERATION FOR SPECTRAL ANALYSIS CSA Editor Wizard ........................137 Select the Signals to Compute....................139 Editing an Arbitrary Waveform ....................

  • Page 6: Introduction

    CoCo-80 User Manual Introduction The CoCo-80 (CoCo) is a handheld data recorder, dynamic signal analyzer, and vibration data collector that is ideal for a wide range of industries including automotive, aviation, aerospace, electronics, and military applications that demand easy, quick, and accurate data recording and real-time processing in the field.
  • Page 7 CoCo-80 User Manual amounts of RAM and NAND flash memory for mass data storage. Special thermal and low power design elements eliminate the need for a cooling fan and increases the battery operating time. Proprietary hardware technology delivers more than 130 dB of dynamic range for 2, 4, or 8 channel versions.

  • Page 8: On-Line Support

    On-Line Support To access product information about your CoCo-80, please go to the product page of CI website at: http://www.go-ci.com/support.asp, log in with the serial number of the CoCo-80 and the password included in your shipping documents. After you...

  • Page 9: Limited Warranty & Limitation Of Liability

    A typical page of the CI Technical Support website is shown below. Figure 2: Crystal Instruments CoCo Support Site The latest CoCo-80 application software, device drivers or CSA projects can be downloaded while the CoCo-80 subscription is maintained. Limited Warranty & Limitation of Liability Each CI product is warranted to be free from defects in material and workmanship under normal use and service.
  • Page 10 CoCo-80 User Manual software will operate substantially in accordance with its functional specifications for one year and that it has been properly recorded on non-defective media. CI does not warrant that software will be error free or operate without interruption.

  • Page 11: Safety Information: Read First

    EN 61326:1997+A1:1998+A2:2001 EN61000-3-2: 2000 & EN61000-3-3: 1995+A1:2001 Use the CoCo-80 and its accessories only as specified in this User’s Manual. Condensation may form on the circuit boards when the device is moved from a cold environment to a warm one. In these situations, always wait until the device warms up to room temperature and is completely dry before turning it on.
  • Page 12 CoCo-80 User Manual AC Adapter Voltage Range For external power source CoCo-80 uses a wall-mount AC Adapter. The AC Power range is 100Vac – 240Vac. Maximum Measurement Input Voltage Maximum Working Input Voltage: 10 V peak. Voltage ratings are given as “working voltage”.

  • Page 13: Quick Start

    Quick Start This Quick Start section is intended to give a brief introduction to the most basic use of the CoCo-80 system. By following the instructions you will learn how to do the following: 1. Install the EDM software to your host PC.
  • Page 14 CoCo-80 User Manual Figure 4: EDM Installation Wizard Click Next to begin the installation process. Review and accept the license agreement and click Next. Figure 5: EDM License Agreement acceptance page...
  • Page 15 CoCo-80 User Manual To install EDM a valid license key is required. If the default location does not contain your license key, browse for the correct folder. Once the license key has been specified, press Next. Figure 6: License Key directory page...
  • Page 16 CoCo-80 User Manual Figure 7: Installation Directory page If desired, specify preferred location for Data Files, CSA Projects, Arbitrary Signal files, and Limit Collection files. Press Next to continue. Figure 8: EDM Default Save location page...
  • Page 17 CoCo-80 User Manual Specify Start Menu folder name and press Next. Figure 9: Programs folder title page Select your preferences for Shortcuts, Default Units, Default Language, Paper Size, and Multiple Module support. These setting can be changed later in the...
  • Page 18 CoCo-80 User Manual Figure 10: EDM Default settings Review the installation setting. Click back if changes are necessary. Click Next if all settings are correct. The Installation Wizard will then set up EDM according to the settings. Figure 11: Installation summary page...
  • Page 19 EDM has two working modes for use with CoCo:  CoCo-80 DSA mode: access CoCo-80 in its DSA mode, download, and view data files. CSA Editor, a tool for editing CoCo testing projects, will be included in this mode. This manual will cover...
  • Page 20 CoCo-80 User Manual Figure 13: EDM DSA Working Mode CoCo-80 VDC mode: creates a route data collection database, uploads settings to CoCo, downloads data to PC, and performs trending and alarm analysis. There are two versions of VDC modes: personal and enterprise. The personal version allows the user access the database on his local PC.

  • Page 21: Where Is My License Key

    Your License Key is a file with extension of *.LIC. There are three ways to obtain your EDM software License Key: (1) When your EDM Software and CoCo are shipped from Crystal Instruments, we will send out an automated email message providing shipping information, your License Key and the Serial Number of your instrument.

  • Page 22: Usb Device Driver

    SETUP.EXE file to your computer, and install it manually. 5. Request a new installation CD from CI. Recording Time Streams with CoCo-80 Push the power button on CoCo and wait for about 30 seconds until the Welcome screen is displayed. If the CoCo is not charged, connect the power supply to simultaneous power and charge the system.

  • Page 23: Download Data To The Pc

    Download Data to the PC Connect the CoCo to the PC using the USB cable provided. Note there are two USB ports on the CoCo-80 device. Connect the USB cable to the smaller USB- client connector shown below. Figure 16: CoCo to PC USB Connection Browse for the device driver on the CD and the Windows operating system will automatically install the CoCo-80 USB driver on the PC.
  • Page 24 CoCo-80 User Manual streams of the input channels and does not allow the use of a trigger, transient capture, or spectral analysis. Features for a specific CSA are defined using CSA Editor, a utility in EDM.

  • Page 25: Basic Coco-80 Operation

    CoCo-80 User Manual Basic CoCo-80 Operation This section provides a detailed description of the CoCo-80 device including the user interface, hardware, CSA projects, and peripherals. CoCo-80 User Interface The CoCo-80 menu-driven user interface is easy to use and requires little training.
  • Page 26 CoCo-80 User Manual Button Name Functions Power the system on Power the system off Reset the system (press and hold it for 4 seconds or longer) Power Shift the functions of the arrow buttons or other buttons SHIFT Move the focus up...
  • Page 27 CoCo-80 User Manual Button Name Functions Start or stop the time domain data recording designated by the CSA project Rec./Stop Save the signals that are designated by the CSA project Save Open the input channel setup page to configure the sensors...
  • Page 28 CoCo-80 User Manual around a trace. When cursors are enabled, arrow buttons are used to move the cursor positions. In the trigger setup window, the arrow buttons can be used to move the threshold and trigger delay. Enter Button The Enter button is used to accept an entry or select an item on the display. In general to select an item use the arrow buttons to move the focus to the item and then press the Enter button to select the item.

  • Page 29: Status Bar

    It is just like texting messages with most cell phone. Pressing the display will cycle through 2, a, b, c, and begin again at 2. Figure 20: Display Button Status Bar The Status Bar indicates the status of the system. Figure 21: CoCo-80 display Status Bar.

  • Page 30: Welcome Screen

    CoCo-80 User Manual Navigation indicates the name of the  screen or provides information about the analysis such as sampling rate. Volume indicates the volume level for the internal speaker.  Power indicates battery or line power.  Battery status indicates the state of charge.
  • Page 31 When additional CSA projects are loaded from a PC to the CoCo-80 they will appear on the menu. After selecting one CSA project from the menu press the F6 (Run) soft button to load and run the CSA project.

  • Page 32: Display Button

    Delete removes the CSA project from the CoCo-80 flash memory. The CSA project can be reloaded from the PC if it is accidentally deleted. Move to lets you move the CSA project file to another group.
  • Page 33 CoCo-80 User Manual Figure 26: Two trace window. A trace is defined as a display area with an axis that can show multiple signals of the same dimension such as time or frequency. Only the signals with the same engineering units in X and Y axis can be overlaid.
  • Page 34 CoCo-80 User Manual Figure 28: A single trace within a window A trace typically consists of five objects: 1. The signal label on the left side (displayed as APS(ch1) in this example) 2. The center display area (the area highlighted in red) 3.
  • Page 35 CoCo-80 User Manual Highlight Area After pressing Enter Description Highlight the Y Label area then press the Enter button. CoCo will show Change Signals in Trace window Highlight the center plot display area then press Enter. CoCo will change to ZOOM mode for 5 seconds.
  • Page 36 CoCo-80 User Manual Figure 29: Display Settings Display Preferences contains the settings for trace defaults, shown below. When the blue focus is on each item, press Enter to choose display preferences options from the dropdown menu. Finally, press Apply to save the changes and go back to the previous screen, or press Cancel to go back to the previous screen without saving any changes.

  • Page 37: Signal Display Soft Buttons

    CoCo-80 User Manual Signal Display Soft Buttons Traces (F1) Pressing F1 (Traces) opens the Window and Trace Menu. This menu lists the names of the existing windows in the display and is used to change the windows and signals in the display. The menu lists the defined windows at the top of the menu.
  • Page 38 CSA as display candidates will be visible and available to be added to the trace. This feature is designed to simplify the user interface and optimize the CoCo-80 computation resources. If a signal is not available for display then the CSA must be edited before it can be added.
  • Page 39 CoCo-80 User Manual Figure 34 In screen of Trace and Windows Setting different view modes can be selected Other soft buttons under the Trace and Window settings control the windows in the current display. Add Window creates a new window in the Window List.
  • Page 40 CoCo-80 User Manual Param -> Analysis Parameters is used to change parameters that are defined in the CSA project. These parameters depend on the definition of the CSA project but may include block size/line, window type, average mode, average number, weighting type, etc.

  • Page 41: Input Channel Table Settings

    CoCo-80 User Manual Figure 37: Input channel status display Figure 38: Input channel setup table Select F1 (Edit Table) to bring up the Input Channel Table. This is used to set the sensitivity, input mode, and label for the hardware input channels. To edit these parameters use the Arrow buttons to select the parameter and press Enter.
  • Page 42 CoCo-80 User Manual Figure 39: The sensor parameter menu  Measurement Quantity defines the quantity such as acceleration, velocity, displacement, force, voltage, etc.  Sensor Engineering Units defines the engineering units such as , cm/s , g, etc. for the input channel.
  • Page 43 CoCo-80 User Manual Figure 40: Channel status window The instrument can automatically detect the status of IEPE sensor connections. If the IEPE type of sensor was not connected correctly, the input channel status will display IEPE. In the picture above, channel 1, 2, and 3 are enabled with IEPE input mode, channel 4 is not.
  • Page 44 F4 (Enable). The output can be turned off by pressing F4 (Disable). When the Arb waveform is selected, an arbitrary waveform file must be selected to output. This file must be uploaded to the CoCo-80 through EDM before it can be used.
  • Page 45 CoCo-80 User Manual Figure 43. Arbitrary waveform setup. In the arbitrary waveform setup, the duration is fixed by the number of points in the arbitrary data file and the sampling rate in use. The Quiet Zone is the time with “zero” output between two arbitrary waveform pulses. The Peak Output Level is the normalized maximum volt for the output waveform.
  • Page 46 CoCo-80 User Manual Figure 44. Schedule Setup. The test schedule automatically controls the test duration and imitates human operation. Multiple testing schedules can be developed and one is executed at a time. A testing schedule event can include the following events: Loop/End-Loop,...
  • Page 47 CoCo-80 User Manual When the schedule is activated, the schedule status will be displayed during the run time. Figure 46: Display as a schedule of operations is performed Use the following formula to calculate the total time duration that you can record:...
  • Page 48 Time Stream Recording Setup is dependent on the selected CSA. Note that only signals that are identified as Record Candidates in the CSA file will be visible and can be recorded. This feature is designed to simplify the CoCo-80 user interface and optimize the device computation resources.
  • Page 49 Spectral Save Setup is dependent on the selected CSA. Note that only signals that are identified as Save Candidates in the CSA file will be visible and can be saved. This feature is designed to simplify the CoCo-80 user interface and optimize the device computation resources.
  • Page 50 CoCo-80 User Manual Limit Check Alarm Events include Beep, Screen Flashing, Event Log into Testing Log, Send Message to Host PC, Save Signals. Control (F3) Figure 51: Control menu Control -> Restart is used to reset the relative time base of the time streams and also reset the averaging and triggering if these features are used in the current CSA project.
  • Page 51 CoCo-80 User Manual Auto Scaling Shift Reduce/Expand Left/right button ZOOM scaling Up/Down Move position Figure 53. Trace navigation buttons. Cursor (F5) Cursor adds a vertical cursor to the trace. Use the Right and Left arrow keys to move the cursor. The signal values are listed to the right for all signals in a trace.
  • Page 52 CoCo-80 User Manual Figure 56. Peak Detector To calculate RMS within a frequency band for frequency-domain signals, select the Calculate RMS menu item: Figure 57. Cursor setup The RMS value will be displayed in the same unit as Y label units. This value is the energy between the two vertical cursors.
  • Page 53 CoCo-80 User Manual Calculate THD option will calculate the Total Harmonic Distortion of auto-power spectrum signals between the two vertical cursors. The CoCo looks for a peak near the left cursor to use as the primary frequency. Figure 59: THD function using a cursor When displaying Frequency Response signals, there is a Calculate Damping feature.
  • Page 54 CoCo-80 User Manual Figure 61: Calculated damping ratio display In time-domain signals, the calculate RMS feature is available to calculate the root-mean-square value of the signal duration specified by two vertical cursors. In addition, the damping value of a periodic decaying signal can be calculated. To do this, select Calculate Damping, and place the two cursors on the peaks of successive periods.

  • Page 55: Display Window Types

    CoCo-80 User Manual that Run/Hold is independent of Record/Stop. This means that when in Run mode signals are not recorded to memory until the Rec./Stop button is pressed. The record status is indicated by the red record icon blinking at the top of the screen during recording.

  • Page 56: Setup Button

    CoCo-80 User Manual Figure 63: Nyquist Plot While viewing this plot, pressing F5 will add a cursor as a small green ‘+’. Press the Left and Right arrow keys to move the cursor. The current frequency, real and imaginary values, and the magnitude and phase are shown on the right.
  • Page 57 This display can be used to monitor the remaining flash memory during field operations. When the flash memory is full the data must be downloaded to the PC and removed from the CoCo-80 before more data can be recorded. Figure 66: Memory and DSP CPU usage.
  • Page 58 CoCo-80 User Manual Date/Time sets the current date and time so a timestamp can be included as a file attribute with the data files. Figure 67: Date and Time Settings Connections displays the status of the Ethernet, USB, or Wireless connections.
  • Page 59 CoCo-80 User Manual Figure 69: File browsing of the SD card Power indicates the status of the power including the Remaining Capacity of the battery. The Advanced soft button configures the power settings to optimize the battery life for specific conditions including Automatic Mode which maximizes the battery life by automatically turning off the LCD and the backlight and Ethernet.
  • Page 60 Figure 71. Password Management F2 (Update) allows the CoCo to check for new software components on the Crystal Instruments server and conduct online software updates. The CoCo must be connected to the Internet using Ethernet when an on-line update is performed.
  • Page 61 CoCo-80 User Manual Figure 73. CoCo Hardware and Software Information The F1 (Soft. Options) button will display all CoCo options and indicated which are installed. Figure 74. Software Options. The F1 (Check Options) button will check the CI Server for available software options that can be installed.
  • Page 62 CoCo-80 User Manual Figure 75. CoCo DSA Online Help F5 (Other) -> Start Page sets how the CoCo starts up. CoCo can start in DSA or VDC mode directly, or can wait for user’s selection. Figure 76. CoCo Start Page Setup F5 (Other) ->...
  • Page 63 CoCo-80 User Manual Figure 77. CoCo User Information F5 (Other) -> Digit Notation is used to change the format for numbers displayed on the CoCo-80. The options are Floating Point, Scientific or Engineering notation. Figure 78. Digit Notation Settings. F5 (Other) -> Theme changes the display from black to white background.
  • Page 64 CoCo-80 User Manual Figure 79. Theme Settings: Black or White Style. F5 (Other) -> Test Note allows entering a note to a test or scanning to enter the test note. Figure 80. Test Note Configuration F5 (Other) -> System Calibration is used to calibrate the CoCo system. The CoCo loads factory calibration data during start-up, eliminating the need for daily calibration checks.
  • Page 65 CoCo-80 User Manual Figure 81: Main System Setup Page Figure 82: Calibration Start Page F1 (View Report) – view the calibration report. F2 (Meter Info) – edit meter parameters (Operator, Meter Model, Meter Series, and Description) F5 (Cancel) – go back to previous screen without saving any changes.

  • Page 66: File Button

    CoCo-80 User Manual Calibrate the output offset (0.1 V Range) Calibrate the output gain error (10 V Range) Calibrate the output gain error (0.1 V Range) Calibrate all the input channels automatically Validate calibration offset result Validate calibration gain result...
  • Page 67 CoCo-80 User Manual highlighting them and pressing Enter. Some of the file operations, available through the soft keys on the bottom of the display, will work on all the selected files at once. Figure 84. File display Rename/Delete -> Delete Newest deletes the currently selected file and all newer files from the flash memory.
  • Page 68 CoCo-80 User Manual Figure 85. View the file content per signal. A time waveform signal can be viewed in more detail by pressing F6 (View). This view shows a plot of the entire signal on top and of a zoomed in portion on the bottom.

  • Page 69: Rec./Stop Button

    CoCo-80 User Manual Figure 87: Recalling data files A signal can be recalled into an existing trace or a new trace. Recalling into an existing trace will plot this signal over the other signals in that trace. The signal can also be played back through the output channel of the CoCo. To do this, press F5 (Playback), and then press F1 (Start Output).

  • Page 70: Save Button

    The Spectral Save Setup menu in F2 (Param.) contains settings for which blocks are saved and where they are saved. When the CoCo-80 is connected to a PC, the saved block signals can be downloaded using the EDM software. Next Trc (Trace) Button The Next Trace button is used to switch to the next trace if multiple traces are available during the test.

  • Page 71: Trg (Trigger) On/Off Button

    CoCo-80 User Manual Trg (Trigger) On/Off Button The Trg On/Off button is used to turn on/off trigger. It is a shortcut to arm the trigger instead of going to acquisition mode to arm the trigger. See the acquisition mode section for more information about configuring the trigger.
  • Page 72 CoCo-80 User Manual Figure 90: VDC Analysis Input Channel Sensor Setup Sensitivity is defined in millivolts per engineering unit. The Engineering Unit is dependent on the Measurement Quantity selected. This selection opens a numeric keypad to enter the sensitivity value. Press F6 (OK) to accept the value.
  • Page 73 CoCo-80 User Manual Figure 92: Select measurement quantity for a channel Hi-Pass Fltr sets the cutoff frequency of high-pass filter for each individual channel. This is a very important parameter especially when accelerometer is used at the front-end and velocity or displacement is set as measurement quantities.

  • Page 74: Coco-80 Startup And Shutdown

    The Power button is located in the lower-left corner of the CoCo. The very first time the CoCo-80 is used, it is necessary to set the clock time. All the data acquired and stored will include the time it was recorded as a file attribute with a clock time accuracy of seconds.

  • Page 75: Keypad Lock

    CoCo-80 Software Disaster Recovery through EDM In the event that the CoCo-80 application software programs are completely corrupted due to an unknown reason, EDM can be used to restore the CoCo-80 back to its original state when via USB. To perform a full recovery open Global Settings through the CoCo menu and select CoCo Recovery.

  • Page 76: Hardware

    CoCo-80 User Manual Hardware CoCo-80 Input Connections This section describes the CoCo-80 input connections and the related circuit design including a description of AC/DC-Single End, AC/DC-Differential, and IEPE input modes. Figure 97: CoCo-80 IO connection panel System Calibration The CoCo loads factory calibration data during start-up, eliminating the need for daily calibration checks.

  • Page 77: Coco-80 Output Connections

    IEPE. CoCo-80 Output Connections The CoCo-80 includes one output channel that can act as a function generator to provide a variety of waveforms synchronized with the input channel sampling rate. The output channel is a SMB mini-jack. A SMB-to-BNC adaptor is provided with the unit.

  • Page 78: Coco-80 Peripherals And Accessories

    Waveform. CoCo-80 Peripherals and Accessories This section describes the peripherals and accessories available on the CoCo-80 including SD Card, audio devices, Ethernet, USB, audio and battery. The CoCo- 80 includes interfaces to many peripheral devices. These can be connected to the hardware via the connectors shown below.

  • Page 79: Ethernet

    PC. A cross-over Ethernet cable must be used to connect the CoCo-80 to a PC directly. If CoCo is connected to a network hub, router or a switch, then a regular Ethernet cable (not a crossover cable) should be...

  • Page 80: Usb Ports

    USB 1.1. The shapes of two ports are different, as shown below: The USB-client port is used to establish communication between the CoCo-80 and a PC. When the USB-client port is used, CoCo-80 device acts as a slave unit.

  • Page 81: Mouse Support

    4. System boot-up failure Battery There are two batteries inside the CoCo-80 device, the clock battery and the main battery. The clock battery is only used maintain power to the internal clock. It is located inside the hardware and should be replaced when necessary by an authorized CI service center and should not be replaced by the user.

  • Page 82: Battery Charger

    80 and the AC power source. The power source must be in the range of 100 - 250 VAC. When the CoCo-80 is turned on, a battery capacity symbol is shown on the status bar that indicates the state of charge of the battery.

  • Page 83: Coco-80 On-Line Updates

    The CoCo-80 application software has the capability to check for software updates from the CI web server when you connect the CoCo-80 device to the Internet. You first connect the CoCo-80 to a local network using regular Ethernet. After you connect it, press Setup button and click the Update icon.

  • Page 84: Csa - Configurable Signal Analysis

    When the CoCo-80 powers up the Welcome screen is shown. From this screen the use must select one of the CSA projects loaded on the CoCo-80. When a CSA project is selected, the project defines the settings and analysis functions that are computed by the CoCo-80.

  • Page 85: Preprogrammed Csa Projects

    3. Output Channel: output waveform settings All pre-programmed CSA projects have predefined parameters that are loaded when the project is selected. You can modify the parameters on the CoCo-80 from the Param Soft Button in the Display screen. Modified CSA projects can be saved with a different name using the Save As soft Button in the Analysis screen so that the original projects are not overwritten.
  • Page 86 CoCo-80 User Manual CSAs used for 4- CSAs used for 8- CSA Group channel CoCo-80 channel CoCo-80 Description Calculate the RMS of each input channel. Overlap ratio RMS(4).csa RMS(8).csa and average time are changeable. Apply no data conditioning for Time(4).csa Time(8).csa...
  • Page 87 CoCo-80 User Manual CSAs used for 4- CSAs used for 8- CSA Group channel CoCo-80 channel CoCo-80 Description Calculate the cross power spectra when channel 1 set as CrossPowerSpec(4).cs CrossPowerSpec(8).csa reference and the others as responses. Calculate the FRF and coherence when channel 1 set FRF_COH(4).csa...

  • Page 88: Change Csa Projects From The Coco-80

    A CSA project specifies the analysis settings and functions including: analysis parameters and functions, time stream recording, block data save and trace settings. After a CSA is selected it can be modified from the CoCo-80 to change these parameters using the...

  • Page 89: Signal Processing In The Coco

    This part will be explained in detail in the next section. The Data Processing Flow of CoCo CoCo-80 combines two instruments, a data recorder, and a signal analyzer into one system. It is important to understand the differences between these two functions. The following sections provide details of each.
  • Page 90 CoCo-80 User Manual The signal analyzer phase includes the Acquisition Mode and CSA based block- by-block processing. The acquisition mode controls how the continuous time streams are captured into fixed-sized blocks. The processing phase applies algorithms such as spectral analysis to the blocks.

  • Page 91: Acquisition Modes

    CoCo-80 User Manual Block Size governs the size of transient capture or FFT blocks in the signal analyzer phase. Block Size has no influence on the length of the time streams in the data conditioning phase. Both time streams and block-by-block signals can be displayed with continuous update (Run mode) or frozen on the screen (Hold mode).
  • Page 92 CSA can be selected as trigger source on the CoCo-80. If a signal is not identified as a trigger source candidate in the CSA file then the signal will not appear on the list. This feature is designed to simplify the user interface and optimize the CoCo-80 computational resources.
  • Page 93 CoCo-80 User Manual Trigger Condition Trigger Condition defines when a trigger is detected based on the signal level and the slope. The four choices are:  Trigger Source > High Level (rising edge)  Trigger Source < Low Level (falling edge) ...
  • Page 94 CoCo-80 User Manual Trigger Condition Illustration High threshold level Trigger Source > High Level (rising edge) Trigger Source < Low Level (falling edge) threshold level High threshold level Low Level < Trigger Source < High Level (level trigger) threshold level...

  • Page 95: Acquisition Mode Setup

    CoCo-80 User Manual Block Size = 1024 High threshold level Trigger delay: 102 points -10% Figure 102. Pre-Trigger (negative delay) example. Overlap When overlap is enabled, consecutive data blocks have overlapped samples. This reduces the averaging time. Overlap is only used when the Acquisition Mode is set to Free Run or Continuous after Trigger.
  • Page 96 CoCo-80 User Manual Press F2, Trigger Source, to select one of the time streams as the trigger source. These time streams are set as Trigger Source Candidates by the CSA Editor when this CSA project is created on the host PC.

  • Page 97: Using A Trigger During Measurement

    CoCo-80 User Manual  Auto Scale Window  Fixed Scale Window: Arrow buttons used for expanding or reducing the scales  Move Window: Arrow buttons used to shift the positions of the window  Set Trigger Level: Arrow buttons are used to set the high threshold...
  • Page 98 CoCo-80 User Manual You can change from the waiting for trigger mode to Hold mode by pressing the F6 (Hold) button. The window will close and the system will change to Hold mode. Press Restart (F3) or Run (F6) to reopen the window and return to the waiting for trigger mode.
  • Page 99 CoCo-80 User Manual If you press Reject then the captured time signals will be discarded and will not be sent to signal analysis stage. After the Reject action, the system goes back to waiting in trigger mode. The number showed on the top status bar, #N, indicates the number of the frames of the time captures that have been accepted and averaged into the spectra.

  • Page 100: Built-In Digital Integration

    CoCo-80 User Manual Built-In Digital Integration Ideally a measurement is made using a sensor that directly measures the desired quantity. For example an accelerometer should be used to measure acceleration, a laser velocimeter or velocity pickup should be used to measure velocity and an LVDT should be used to measure position.

  • Page 101: Sensor Consideration

    CoCo-80 User Manual The CoCo instrument handles these three issues effectively so you can get reliable velocity or displacement signals from the acceleration measurement, or displacement signals from the velocity measurement. The CoCo hardware has a unique design to provide 130dB dynamic range in its front-end measurement.

  • Page 102: Calculation Errors In Digital Integration

    CoCo-80 User Manual Calculation Errors in Digital Integration Two types of calculation errors can be caused by digital integration: low sampling rate and DC offset. The sampling rate of a signal must be high enough so that the digital signal can accurately depict the analog signal shape.

  • Page 103: Digital High-Pass Filter

    CoCo-80 User Manual acceleration integrated to compute velocity and result in a drift and eventually an infinite large magnitude of displacement after double integration. Displacement Velocity Acceleration Figure 107. A small error in acceleration results in a DC offset in velocity and a huge drift in displacement.

  • Page 104: Using Integration

    CoCo-80 User Manual Using Integration Integration can be enabled in the Input Channel table. In CoCo, to set up the built-in integration or double integration, you must set two engineering units. The first one is for sensor sensitivity; the second for the engineering unit after the integration or differentiation.
  • Page 105 CoCo-80 User Manual Select the appropriate engineering units for displacement. The example shows displacement units of millimeters. Figure 109. Sensor sensitivity window with double integration and units. With this setup, the accelerometer is set to measure while the displacement is...

  • Page 106: Coco-80 Operation For Spectral Analysis

    CoCo-80 User Manual CoCo-80 Operation for Spectral Analysis This section describes the operations of CoCo that are specifically related to the FFT spectral analysis. For general operations of CoCo, refer to the previous chapters of this manual. Select a CSA Project...

  • Page 107: Set The Spectrum Type

    CoCo-80 User Manual Figure 111. CoCo Analysis Parameters selection display. Block Size: the block size of the time block signals. Average Mode: Exponential, Linear or Peak Hold applied to frequency domain, power spectra averaging. Time Linear and Time Exponential applies to time domain averaging.

  • Page 108: Set The Output Channel Parameters

    CoCo-80 User Manual Figure 112. CoCo. Spectrum Type selection display. Set the Output Channel Parameters To enable the output channel as a function generator select Output Channel from the Param. Button. Next select the waveform. To set the amplitude and frequency and other parameters move the cursor to the parameter and press the Enter Button to edit the parameter.

  • Page 109: Create Display Window And Set Up The Trace

    CoCo-80 User Manual Select the waveform from the list on the left and use the Arrow Buttons to move the cursor to the quiet zone, duration and peak output level settings on the right. Press the Enter Button to edit any of these parameters.

  • Page 110: Db And Linear Magnitude

    CoCo-80 User Manual dB and Linear Magnitude Most often, amplitude or power spectra are shown in the logarithmic unit decibels (dB). Using this unit of measure, it is easy to view wide dynamic ranges; that is, it is easy to see small signal components in the presence of large ones. The decibel is...

  • Page 111: Set Acquisition Mode

    CoCo-80 User Manual Another display format is called Log, or LogMag. The Log display shows the signal scaled logarithmically with the grid values and cursor readings in actual engineering value. The picture below shows the same signal in LogMag. Figure 117. A 1Vpk sine signal in frequency domain with LogMag scaling.

  • Page 112: Select The View Mode

    CoCo-80 User Manual Figure 118. Overlap Rate selection. Select the View Mode The View Mode defines how the data will be displayed on the screen. To change the view mode select View Mode for Current Trace under the Param. button.

  • Page 113: Coco Operation For Transient Capture

    CoCo-80 User Manual CoCo Operation for Transient Capture Select a CSA Project This section discusses the CoCo settings that are specifically related to transient capture applications. For a complete explanation of these settings refer to the Basic CoCo Operation section. To run a Transient Capture CSA press the Analysis button and select a CSA Application Group that includes transient capture option.
  • Page 114 CoCo-80 User Manual Figure 121. Trigger Modes for Transient Capture. Trigger Source defines which signal to use as the trigger source. Only signals specified in the CSA script are available as trigger sources. If a signal is not available then it can be added as a trigger source by editing the CSA file and downloading it to the CoCo hardware.
  • Page 115 CoCo-80 User Manual Figure 123. Overlap rate for transient capture. After the Parameter Settings are specified the CoCo begins to wait for a trigger event. A window displays the time elapsed before a trigger event is detected. Figure 124. Waiting for trigger message.
  • Page 116 CoCo-80 User Manual Figure 125. Accept/Reject display for transient capture. The frame average number is displayed in the status bar to help you monitor how many averages have been recorded. When the averaging mode is set to linear and you reached the averaging number you are prompted to restart a new test by pressing the Run Button.

  • Page 117: Save Averaged Data

    CoCo-80 User Manual Save Averaged Data Data can be saved at any time by pressing the Save Hardware Button. This opens a menu with several options. Press the Save Button again to save the signals in the save list. This can be done in the middle of an average or at the end.

  • Page 118: Saving And Recording Data

    CoCo-80 User Manual Saving and Recording Data Ranging from different applications, several ways are devised to save the signals that are being measured. The media of storage can be either internal flash memory or SD memory card. Save Long Time Waveform Signal: the time streams can be saved either automatically by a preset schedule or manually.
  • Page 119 CoCo-80 User Manual Recording Time in Seconds = Total Installed Memory in Bytes/(( No. of Channels) * (Sampling Rate) * 8 Bytes * 1.2) For example if you enabled 6 channels, the sampling rate is 100 Hz with 4GB memory installed: Recording Time in Seconds = 4GB/(6*100*8*1.2) =...

  • Page 120: Save Block Signals

    CoCo-80 User Manual Save Block Signals Data can be saved by defining which signals to save and under what conditions. Select Spectral Save Setup under the Param. Button. Figure 129. Spectral Signal Save Setup. Choose which signals should be saved by using the Up and Down Arrows and the Enter Button to add a check next to the desired signals.

  • Page 121: Save Points

    CoCo-80 User Manual Signals Continuously. This option can be used to view all data blocks on a waterfall plot. Save Points Save Points function saves a data point per signal at one time. This function is particularly useful in the very long period monitoring applications. For example people can save and monitor the vibration or acoustic level over a few months by looking at the data points saved every hour.
  • Page 122 CoCo-80 User Manual Insert appropriate entries into the schedule: To activate the schedule, press the Display button for more than 3 seconds, then release the button.

  • Page 123: Recall Signals

    CoCo-80 User Manual To deactivate the schedule, press F6 Exit button in the signal display screen. Recall Signals Signals that are the result of a current measurement are named “live” signals. Occasionally it is helpful to compare live signals with previously saved signals and stored on the CoCo device.
  • Page 124 CoCo-80 User Manual Figure 131. File review screen for recalling signals. The CoCo will show a menu listing all available windows that this signal can be recalled into. The last item is always “Recall the signal to a new window”. This item will create a new display window in the current active project and display the recalled signal into this window.
  • Page 125 CoCo-80 User Manual Figure 133. Recall signals from the trace menu. Figure 134. Un-recall signal The recalled signals will have a signal name with a prefix of its file name. The recalled signals can be displayed in the same way as live signals.
  • Page 126 CoCo-80 User Manual The picture below shows a recalled signal in green color overlaid with a live signal in yellow. Figure 136. Live signal overlaid with recalled signal.

  • Page 127: Edm Pc Software

    EDM PC Software This section briefly describes the Engineering Data Management (EDM) software that is used to download data from the CoCo-80 to a PC and to view, analyze and export that data. For details about EDM software installation and operation please refer to EDM User’s Manual.
  • Page 128 CoCo-80 User Manual 2. CoCo-80 VDC mode: creates route data collection database, upload settings to CoCo, download data to PC, trending and alarm analysis. There are two versions of VDC modes: personal version allows the user access the database on his local PC. Enterprise version allows multiple user access the database on the LAN.
  • Page 129 CoCo-80 User Manual 4. Post Analysis Mode: analyzes the data files on PC using various algorithms. PA has three versions: PA Viewer allows the user to view the data and create report; PA Basic has FFT spectral analysis and 3D signal display functions;...

  • Page 130: The Coco Dsa Mode Of Edm

    The EDM Software functions as both the means of transferring date from the CoCo-80 to the PC and also as a data management and analysis tool. The main features of the software include: transferring data between the CoCo-80 and a PC, viewing, searching and exporting data to other formats and using the analysis tools to measure signal characteristics.

  • Page 131: Data Management

    CoCo-80 – PC Communication The first step in downloading data from the CoCo-80 to a PC is to establish communication between the two devices. CoCo-80 is equipped with a number of hardware connectivity functions for easy communication with a host PC. These include: ...

  • Page 132: Transfer Data Files To The Host Pc

    Transfer Data Files to the Host PC To transfer the recorded data files to a PC, you must: 1. Establish a physical network connection between the CoCo-80 and a PC. This can be done by using either the Ethernet, USB-client port, or...

  • Page 133: Configuring The Coco-80 Network Settings

    CoCo-80 User Manual 2. Execute the EDM software on the PC. 3. Download the data files from the CoCo-80 to PC using EDM software. The data files will be automatically stored in the ASAM-ODS format. They can be converted into other formats with the EDM software.

  • Page 134: Configuring The Host Pc Network Settings

    CoCo-80 Access Code to access it over the LAN. Configuring the Host PC Network Settings If the host system is a PC which is only connected directly to the CoCo-80 using a cross over Ethernet cable, you can manually configure the TCP/IP settings. You can also use the “alternate configuration”...

  • Page 135: Connect Coco-80 To A Pc Directly Using Usb Client

    Connect CoCo-80 to a PC directly using Ethernet via crossover cable Another way to connect the CoCo-80 to a PC directly is to use the Ethernet port and a CAT-5 cross-over cable. The advantage of using Ethernet compared to USB is that the data transfer speed is faster with Ethernet.

  • Page 136: Network Connection Diagnosis

    Network Connection Diagnosis The following section describes methods for diagnosing network connectivity from the CoCo-80 or the PC which may be helpful when setting up the network connection. Diagnosis from the CoCo-80 side A tool is provided to detect the existing network settings from the CoCo-80 side.

  • Page 137: Data Format

    Internet: indicates whether the CoCo-80 is connected to the Internet. CI server: indicates whether the CoCo-80 is detecting the Crystal Instruments server. The CI server is used to host new software to keep the CoCo-80 up to date. Diagnosis from the PC The connection between the CoCo-80 and a PC is managed within the EDM software on the PC.

  • Page 138: Uff Files

    Because of these benefits the ASAM ODS data format was chosen as the internal format for the CoCo-80 and the EDM software. UFF Files The CoCo-80 and EDM Software also support the Universal File format (UFF). This format was originally developed by the Structural Dynamics Research...

  • Page 139: The Binary 58 Universal File Format (Buff)

    CoCo-80 User Manual The Binary 58 Universal File Format (BUFF) The CoCo-80 and EDM software also support the BUFF format. The basic (ASCII) universal file format for data is universal file format 58. This format is completely documented by SDRC and a copy of that documentation is on the UC- SDRL web site (www.sdrl.uc.edu/UFF2/58.asc).

  • Page 140: Ascii Uff

    ASCII UFF The CoCo-80 and EDM software also support the ASCII UFF format. The ASCII UFF file format is a form using the ASCII type to represent all the data sets. For details, see: http://www.sdrl.uc.edu/uff2/58.asc...
  • Page 141 CoCo-80 User Manual...

  • Page 142: Csa Editor Operation For Spectral Analysis

    CoCo-80 User Manual CSA Editor Operation for Spectral Analysis This section describes the operation of CSA Editor related to FFT based spectral analysis. For general operation of CSA Editor, refer to the CSA User’s Manual. CSA Editor Wizard To start the CSA Editor, click on the CSA Editor icon in the upper-right corner in EDM.
  • Page 143 CoCo-80 User Manual Linear Spectrum template can apply data conditioning to native time streams, transforms time streams into block signals, and does data windowing and FFT calculations to generate linear spectra. Auto Power Spectrum is same as Linear Spectrum but can also calculate power spectra.

  • Page 144: Select The Signals To Compute

    CoCo-80 User Manual Time Time streams Acquisition streams of for each data Mode, FFT and native conditioning Blocked Time Auto-Power CSA Template channels output Capture Spectra Cross Spectra FRF/Coh Data Conditioning Only Transient Capture Linear Spectrum Auto Power Spectrum Frequency Response Table 5.
  • Page 145 CoCo-80 User Manual be used as a trigger source in triggered acquisition modes. See ________ for more details. The Signal Analysis tab has two sections. The upper half shows all available block signals, which are all the signals under the Acquisition Mode tab that do not have “No Block Acquisition”...

  • Page 146: Editing An Arbitrary Waveform

    CoCo-80 User Manual streams are named by the function that generated them followed by the source time stream signal in parenthesis. The types of signals include: CHn: the native time stream signal of the nth input channel BLOCK(sig): the block signal acquired from the time stream sig...
  • Page 147 CoCo-80 User Manual After the waveform is completed, the value of each point can be changed by entering the value into the box. New Arb Wave - creates a blank pane for another arbitrary waveform. Copy and Paste let you copy the current waveform into a new waveform.

  • Page 148: Validation

    Application Groups based on the template that was used. Advanced Audio Functions CoCo-2, CoCo-80 and CoCo-90 are all equipped with advanced audio functions. These audio functions allow you to listen to the vibration or any measurement quantity or record voice annotations during signal recording. This document describes how to use the audio functions.

  • Page 149: Hardware Audio Peripherals

    CoCo-80 User Manual 1. You can listen to any measurement input using headphones without interrupting the measurement or recording process. The audio monitoring is automatically scaled to the listening range and the headphone audio can be manually adjusted. 2. You can record voice annotations at any time and length during time stream recording.

  • Page 150: Audio Functions

    CoCo-80 User Manual The headphone jack is located at the second to the left with a headphone symbol. Voice annotations and measured input audio can be played back through the headphones. The external microphone must be ordered from CI. It is designed so that when the microphone button is pushed, the voice annotation recording is activated.

  • Page 151: Headphone Listening

    CoCo-80 User Manual Figure 146. Audio Setup Screen Keypad Sound: Enable and select the internal speaker sound output when any of the buttons are pressed. Power Button Sound: Enable and select the internal speaker sound output when the power button is pressed.

  • Page 152: Record Voice Annotations

    CoCo-80 User Manual Record Voice Annotations After Use microphone to record the voice annotation is checked in the audio setup, connect the external microphone (Part #CoCo-A12) to the microphone jack. Press the Rec/Stop button to record the time signals. While the time signals are being recorded, you can press the microphone button to record your voice annotation.

  • Page 153: Playback The Recorded Signals From Output Channel

    CoCo-80 User Manual The F3 Play button allows you to hear the previously recorded voice annotation. Then you can use the F1 Previous Annotation or F2 Next Annotation Buttons to play all the annotations. If the Voice button is not shown, it means the signal file saved has no voice annotation attached.
  • Page 154 CoCo-80 User Manual If the user made voice annotations while the time stream is recorded, the voice annotations will be played back as well. After the signal playback is finished, the screen will show the message Waveform playback finished.

  • Page 155: Appendix

    CoCo-80 User Manual Notice that the recorded signal will be played back at the sampling speed of when it was acquired. Inside CoCo, the A/D converters and D/A converter share the same sampling clock. Due to this design, when the signal is played back, input signal cannot be analyzed.

  • Page 156: Declaration Of Conformity

    CoCo-80 User Manual Declaration of Conformity Declaration of Conformity for CI CoCo-80, Handheld Data Acquisition System Manufacturer: Crystal Instruments Corporation, 2370 Owen Street, Santa Clara, CA 95054 EC Declaration of Conformity Council Directive 2004/108/EC on Electromagnetic Compatibility Crystal Instruments, 2370 Owen Street, Santa Clara, CA 95054, USA.

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