DL708

Waveform Viewer for DL Series. The Waveform Viewer software program lets you display waveforms captured with the DL700 on your PC. As many as 24 analog waveforms can be displayed simultaneously. In addition to the DL700, this program alsoworks with DL series instruements. You can download a trial version of Waveform Viewer for DL Series at the following URL:Details and downloading

Engine Combustion Pressure Analysis Package

enables engine combustion pressure to be analyzed using measurement data from the WE7000 as well as the DL750 and other Yokogawa DL700 series instruments, which are widely used throughout the auto industry. The package also allows you to

<Applications>

Timing Test of Side-Impact Air Bag

The critical test is the timing from the point of triggering the igniter to the point where the air bag begins to fill with gas. Ideally this time period should be less than 4 mSec. This deployment test procedure should be recorded by a high speed video camera according to SAE J211. The video tape can then be used to investigate, evaluate and analyze problems with the inflator, seat or roof rails.

<Solution Features>:

1. Various Plug-in Modules
The DL708E has, in addition to Voltage Modules, Strain and Temperature (TC) Modules to measure pressure and temperature simultaneously. The Strain module provides transducer excitation and signal conditioning.

2. Versatile Measurement Function, Cursors and Auto-Measurement.
Time measurements of the firing pulse for the igniter to the beginning of bag inflation can be easily, efficiently and accurately made by using the several different cursor functions.

 

Starter Performance Evaluation

Evaluation of starter motors involves measuring the voltage to the starter motor and currents of both the armature and field coil. The starter motor should be tested repeatedly to find problems by evaluating waveform data and measured values such as Peak – Peak and Average.

<Solution Features>

1. History Memory
The DL708E will save up to 1,000 previous waveform displays and corresponding data. After acquisition, all waveform displays can be superimposed on the screen allowing engineers to quickly find trouble points.

2. Measurements Saved and Exported to Excel
Measurements such as p-p and average can be made automatically on each waveform, and saved as an ASCII File. These measurement values can then be exported to a PC for further analysis.

 

Battery Voltage Fluctuation during ABS Action

The ABS prevents the brake from locking up by increasing and decreasing the caliper fluid pressure. To increase the caliper fluid pressure, fluid is pumped back into the master cylinder. This makes the pump motor operate rapidly. A normal ABS operation cannot be obtained if the battery voltage fluctuation resulting from this rapid motor action affects the PWM current signal, which controls the solenoid valve. Thus, there is a need to observe the effect of this battery voltage fluctuation

<Solution Features>

1. The 16 MW (max.) long memory enables all of the behavior from the start to end of braking to be captured at a high sampling speed. It is also possible to measure the abnormal portion of a period in detail using the zoom function, while grasping the entire behavior.

2. Zoom Fit Measurement
This function automatically sets the area for automatic measurement of waveform parameters, so as to match the zoom area. The zoom function not only enables detailed observation of the abnormal portion of a period, but also enables automatic measurement of waveform parameters within the zoom area.

 

Measurement of Injection Timing

Display the measured data overlapped, by using our unique history memory function. Dispersion range and frequency of distribution for each signal are displayed in color.
This method is effective for detecting and analyzing abnormal output waveforms.

<Solution Features>

Multiple-channel, isolated inputs
Can easily measure multiple signals to allow time correlated analysis of sensor outputs.

Distributed display of measured data with history memory function Easy to locate abnormal data.

Color display

distinguishes each wave form even when wave forms overlapped.

Logic Input Module

Allows for ECU evaluation with the same instrument.

Strain Module

Can measure signals from pressure transducers directly.

Yokogawa
Model DL708E/DL716
Digital Osciloscopes, ScopeCorders
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DL750
Characteristics:
  • Maximum 850 V (DC + ACpeak) isolated input
  • A variety of plug in modules
  • Accessories for special applications
  • Maximum A/D resolution: 16 bits
  • Large-capacity hard disk drive (optional)
  • A wide range of interfaces
  • Triggers
  • Ethernet Connectivity and 9.2 GB internal hard disk drive (option available only for the DL716)
Product Description:
ScopeCorder: A new measurement tool combining the functions of an oscilloscope for capturing instantaneous phenomena and a data recorder for monitoring long-term trends
Features:
  • Signal capturing in long memory
    At a given time axis, a greater memory capacity makes it possible to capture signals at a finer time resolution so as to display higher-fidelity waveforms. Conversely, more memory can be used to increase the duration of a recording at a given sampling speed and time resolution
  • History Memory Function
    Automatically stores the most recent 1000 waveform screenshots.This lets you redisplay a waveform that disappears when the screen is refreshed.
  • History Memory Function
    Automatically stores the most recent 1000 waveform screenshots.This lets you redisplay a waveform that disappears when the screen is refreshed.
  • Zoom Function
    Lets you display an entire waveform and enlargements of selected waveform areas after capturing an extended waveform in long memory.
  • Sequential Store Function
    Displays waveforms meeting certain preset conditions after they are acquired over a specified number of screens. By eliminating the need to display a waveform every time a signal is captured, the sequential store feature shortens dead time during waveform acquisition and reduces signal-capturing errors.
  • Envelope Function
    Always captures signals at the maximum sampling speed, regardless of the time-axis setting. Peak input signal values are recorded from the sampled data. This function is effective for purposes such as reliably capturing surge signal that occur intermittently over an extended period of time.
  • Automatic Waveform Parameter Measurement
    This function automatically calculates parameter values based on acquired digital waveform data. It can calculate voltage-axis parameters such as maximum, minimum, and root mean square (rms); as well as time-axis parameters such as frequency, rise time, and duty ratio. When acquisition is completed, waveform parameters for the last 512 measurements can be stored.
  • Cursor Measurement
    The DL708E and DL716 have a variety of cursor functions for viewing waveform data, including the following:

    • V cursor (used to measure X-axis values)
    • H cursor (used to measure Y-axis values)
    • Markers (used to measure specific positions on the waveform)
    • User define cursor (for viewing cursor measurements on the hori-zontal axis in a user-defined unit) Cursors can be combined with the zoom function to view measurements at a higher resolution.
  • Linear Scaling
    The linear scaling function automatically calculates the following equation based on Scaling Coefficient A and Offset B:
    Y = AX + B (where X is the measurement and Y is the linear scaling result) Linear scaling is useful for purposes such as the following:

    • Converting a signal conditioner output to a physical value for direct reading
    • Multiplying the division ratio of an external voltage divider by the measurement
    • Converting voltage measurements (taken using a clamp, etc.) to current value
  • User Define Math
    The standard configurations for the DL708E and DL716 both include addition, subtraction, multiplication, FFT and phase shift calculations (in which the channel-to-channel phase is shifted prior to calculation). The user define math function (optional) lets you define equations using a wide range of functions, including trigonometric functions, differentials, integrals, square roots, digital filters and seven different FFT functions.
  • Real-time hard drive recording
    (with Optional Internal Hard Drive)
  • This option allows you to acquire data in real time to an internal hard drive. In the past, it was necessary to record data on paper using a chart recorder. With the DL708E and DL716, data are recorded electronically. This improves measurement reading precision and makes it easier to manage and analyze data on a PC.
  • Printing options
    Waveforms can be printed out using the built-in thermal printer. The following printout options are available:

    • Hard copy: Select this option to output a screenshot hard copy.
    • Long copy: Select this option to output the waveform on the screen, enlarged by a factor of 2 to 50 along the time axis.
    • Real-time print: Select this option to record signals in real time at chart speeds up to 20 mm/s.
  • Saving and loading waveforms, settings, and screen images
    A variety of different data file types can be stored on internal storage media (floppy disks or hard drive). The main types of files that can be saved are listed below.*1

    • Data files
      Waveform format: Files in this format can be loaded by the DL708E and DL716.
    • ASCII format: Files in this format can be opened directly in PC applications such as Excel.
    • Setup files
      Screen image files (BMP, TIFF, HP-GL, ThinkJet, PostScript) Image files can be inserted in PC word processor documents to easily create reports containing waveforms.
  • *1: The DL708E and DL716 specifications for waveform files and settings files are not compatible with each other.
DL716 Specific Functions:
The DL716 provides as many as 16 analog and 32 bits digital input channels and can use an ultra-long memory with a capacity of 64 M words (with /M3 option).
* The following three functions do not apply to DL708E.

  • Replay function
    The replay function replays an acquired waveform in a scrolling mode on the screen after the acquisition has ended. This means you can view recorded waveform data covering extended time periods (Max. 512 MW) on the screen, much as you would look at chart paper from a recorder. The replay function is very useful for checking data recorded using long memory.
  • The measured waveform is “replayed” across the screen in scrolling mode after the acquisition ends. The scrolling direction and speed can be set by the user.
  • Pulse Count Function
    This feature can be used to automatically calculate the number of pulses for waveforms in range specified by the cursor. It can count track error signals from optical disk and other media in order to evaluate the amount of pick up movement.
  • GO-NOGO Function
    With this function, a waveform parameter is specified for a measured waveform, and the measured signal is evaluated to automatically determine which action to perform.
Wide Range of Interfaces:
  • CSI Interface (standard on DL716, optional on DL708E)
    If your DL708E or DL716 has an internal hard drive (optional), you can connect it to a PC via a SCSI cable. This allows you to access the internal hard drive directly from the PC, making it easy to transfer data files by dragging and dropping them with your PC’s mouse.

    • GP-IB (standard) Serial
    • (RS-232) (standard)
    • Centronics Interface (standard)
    • VGA Output (standard)
    • 32-bit Extended Logic Input (optional on DL716)
    • External Clock Input (standard on DL716, optional on DL708E)
    • Trigger I/O (standard)
    • GO-NO GO Evaluation Output (standard on DL716)
Triggers:
Simple Trigger Edge trigger Sets a regular edge trigger
Enhanced Triggers A ->B (n) Causes a trigger the n-th time that condition B goes true after condition A has gone true
A Delay B Causes a trigger if condition B goes true after condition A has gone true and an interval at least equal to the delay setting has elapsed(condition B is ignored during the delay time)
Edge On A Enables an edge trigger on another input during the interval when trigger condition A is true
OR Causes a trigger when any one of the individual channel conditions set with the patterns goes true
B>Time (Pulse Width Trigger) Causes a trigger when trigger condition B (a pattern) has gone true and remained true for an interval equal to or longer than the set time, and then goes false
B<Time (Glitch Trigger) Causes a trigger when trigger condition B (a pattern) goes first true and then false within an interval shorter than the set time
B Time Out Causes a trigger if trigger condition B (a pattern) goes true and remains true for the time set
Window Causes a trigger if a signal falls inside a window defined by upper and lower thresholds, or if the signal falls outside the window
  • Optimizing trigger functions
  • Action-on Trigger
    When the action-on trigger is activated, specified actions are performed each time a waveform is captured and displayed on the screen: The action-on trigger is useful for saving data reliably and automatically (e.g, when collecting data during automated, continuous tests).
  • Time Trigger
    The time trigger is activated automatically at a specified measurement start time and at specified intervals thereafter. The time trigger function helps you narrow down the times when abnormal data appear during extended continuous tests.
Plug-in Modules :
  • 701855: High-speed isolation module, 12-bit A/D resolution
  • 701856: High-speed module, 12-bit A/D resolution
  • 701852: High-resolution, high voltage isolation module
  • 701853: High-resolution isolation module
  • 701857: High-resolution voltage/RMS isolation module
  • 701860: Temperature module
  • 701870: Logic input module
  • 701880: Strain module
  • 701885: Strain module (with shunt cal)
  • Plug-in modules that work with both the DL708E and DL716 can be selected based on the measured signal type and frequency. New high resolution voltage/RMS isolation module (701857) measures and records RMS values for AC voltage signals. With a maximum permitted input of 850 V (DC + ACpeak), the module faithfully displays waveforms in 16-bit A/D resolution.
  • The wide variety of plug-in modules goes beyond the limits of regular oscilloscopes, giving you access to a greater range of mechatronics related applications.
    Examples include:

    • Maintenance and inspection of turbines and rotating machinery Observing engine behavior
    • Monitoring large plants
    • Monitoring press machine operations
    • Observing vibration and impact tests
    • Observing sudden, singular events
    • Recording changes in temperature and electric potential
    • Substation maintenance
    • Monitoring supply voltage waveform RMS fluctuations
Downloads:
pdf_pic Downloads:General Specifications
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