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ONOSOKKI DS-2000 Series Operation Manual

Rta measurement
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Download this manual See also: Operating Manual, Manual
DS-2000 Series
RTA Measurement
(Real-time Octave Analysis)
ONO SOKKI CO., LTD.

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Summary of Contents for ONOSOKKI DS-2000 Series

  • Page 1 DS-2000 Series RTA Measurement (Real-time Octave Analysis) ONO SOKKI CO., LTD.
  • Page 2 Contents 1. Flow Chart to Measurement 2. Device Connections 3. Real-time Octave Analysis Setup 4. Starting Real-time Octave Measurement 5. Data Processing 1. Flow Chart to Measurement Connect a sound level meter or microphone to Device connection the DS unit. Perform sound pressure calibration with each sensor.
  • Page 3 2. Device Connections 2-1 Device Connections Connect the DS main unit and the PC. Personal computer (notebook) DS-2000 rear panel ONOLINK II → PCMCIA Key protector (USB or parallel) 100VAC 100VAC...
  • Page 4 2-2 Connecting a Detector * When the MI-1211 and MI-3210 are used, an option for direct input (DS-0286/0287) is available. * When the MI-1211 and MI-3210 are combined, use the SR-1100 Microphone preamplifier. * When the MI-1233/1431 and MI-3110 are combined, use BNC cables for direct connection.
  • Page 5 3. Real-time Octave Analysis Setup 3-1 Input Source Setup Select an input source depending on a sensor used. When using a constant-current microphone (a combination of the MI-1233/1431 and MI-3110), select a constant current of 2.0mA. Select “Voltage range” from the “Input” menu. For Input Source, select a signal source suitable for the sensor type.
  • Page 6 3-3 Calibration with Sensor Perform calibration with a microphone. In the case of using a sound level meter, press the CAL button to output a calibration signal. When a microphone is connected, insert the calibrator into the microphone and output the calibration signal. (Do not change the level range after calibration.) Make sure that the sensitivity of the input signal is not exceeded.
  • Page 7 3-4 Displaying Instantaneous Data Perform various setup of real-time octave analysis. Select an input channel. Select 1/1 or 1/3. Select a time constant (movement of bar graph): 10ms, 35ms, 125ms (Fast), 630ms, 1s (Slow), 8s, or Impuls. Set a display range of the Y-axis. Select “Y-Axis set”...
  • Page 8 Similarly, select “Display data select” from the “Display” menu. Select Graph. Select a display channel. Select INST for instantaneous data For microphone input, check Set a frequency-weighting filter. If A- this box to apply A- weighting is set in the sound level meter, weighting only to overall.
  • Page 9 3-5 Calculating Power Average (Equivalent Sound Level Leq) Select “Measurement Time” from the “Input” menu. Enter a measurement time. Inverted during operation. Press the START tool button. Select “Display data select” from the “Display” menu, and select P.AVG for Type. When P.SUM is input, the power summation value is displayed.
  • Page 10 Power average display Power sum total value display...
  • Page 11 3-6 Level Trend Analysis Level trend analysis is performed to analyze how each band level changes with time. Select “Level Trend Time” from the “Input” menu. Select a sampling interval from 1ms to 10s. Trend time length is determined by set Time interval x 2000 (points).
  • Page 12 Select the number of display data items. Select frequency weighting. Select line color respectively. Set channel. Select a band subjected to trend data display. Select “Trend XY-Axis set” from the “Display” menu. Since the initial value is 400, click [...] and enter 2000. Select an upper-limit level and a...
  • Page 13 Level trend data 3D display of level trend Select the Level Trend tab at the top left of the measurement screen. Select “3D Trend” from the “Display” menu. Select frequency weighting. 2D graph can be also selected. X:Band/Y:Time can be also selected.
  • Page 14 Open Trend XY Axis Conditions. Select Upper-limit level and Range same as level trend setup. The initial value is 400 same as level trend setup, so enter 2000 (1999 is automatically displayed). * Out of data for 2000 points, 1/3 octave band data for any desired point and level trend data for any desired band are displayed by using the cursor.
  • Page 15 Displaying Lx Lx operation for each band can be displayed using data for 2000 points sampled in level trend analysis. Lx indicates the percentile sound pressure level with which the number (frequency) of sampled data for each level is obtained. The DS-2000 simultaneously displays L1, L5, L10, L50, L90, L95, L99, Lmax, Lmin, and Lavg for each band.
  • Page 16 * Lx display for each band at 1kHz Displays L1, L5, L10, L50, L90, L95, L99, Lmax, Lmin, and Lavg for each band. L1 to Lavg are connected for each band.
  • Page 17 4. Outputting and Saving Data 4-1 Saving Display Data This function saves the power averaging data, power total value, and other graph data displayed in the measurement screen. (Trend data is saved by another operation.) Select “Data Save” from the “File” menu. Specify file name.
  • Page 18 4-3 Saving Level Trend Data Level trend data is temporarily saved in the auto memory. The level trend data saved in the auto memory can be saved in a file. Select “Auto Memory” from the “Input” menu. Set a comment as required. The comment is reflected when a file is loaded.
  • Page 19 4-4 Loading Level Trend Data The following procedure loads and displays level trend data saved in a file. Select “Auto Memory” from the “Input” menu just as when saving the data. Select a file to be loaded. Press Open to load the file.
  • Page 20 4-5 Copy Function Measurement data can be temporarily put in the clipboard. The data in the clipboard can be easily pasted to other applications without saving. Select “Copy set” from the “Edit” menu. Select Bit Map or Text using the option buttons. Click OK to apply the settings.