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Changes for page Testing Procedures

Last modified by robert on 2024/12/09 16:08
From version 8.1
edited by Jack Dent
on 2024/12/09 10:12
Change comment: There is no comment for this version
To version 10.1
edited by Jack Dent
on 2024/12/09 10:23
Change comment: There is no comment for this version

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454 454  
455 455  //(originally written by F. Bozinovic May 2024)//
456 456  
457 +
458 +=== Introduction ===
459 +
460 +Sensor calibration allows user to input an electrical test signal into a connected sensor to simulate ground motion. The resulting digitized sensor output can then be analysed to assess various attributes of the sensor, such as basic functionality,
461 +frequency response and/or sensitivity stability over time. For a high-quality broadband sensor, these parameters typically remain stable over time, so that if the sensor initially meets manufacturer’s specifications and has not suffered damage,
462 +then calibration is usually not required. However, calibration can be a useful quality control check if it is suspected that the sensor may be defective or damaged after multiple deployments.
463 +
464 +(% class="box infomessage" %)
465 +(((
466 +NOTE: Not all sensors have this capability and user must refer to the manufacturer’s datasheet for clarification.
467 +)))
468 +
457 457  === Process ===
458 458  
459 459  The Centaur data recorder can generate and output an analog signal using a 16-bit internal digital-to analog converter (DAC). The DAC output is applied to the sensor for calibration purposes via the matching sensor cable. Make sure to use manufacturer cables as the correct signal lines have been connected to the correct pins of the mating connector. The Centaur CTR, CTR2 and CTR3 series models may generate signals of up to ±5 V amplitude, while the Centaur CTR4 series models have an enhanced calibration output.
460 460  
461 -Calibration output signal actions are launched from the Waveform page in the Centaur Web interface. A synthetic waveform signal generator allows you to generate sinewave and pseudo-random binary (PRB) signals on demand. User can configure the sine frequency or PRB pulse width, signal duration and amplitude as well as specify lead-in and lead-out silence intervals before and after the calibration waveform. One can also select and play a calibration file containing any other desired digital time series waveform that by uploading it to the Centaur, such as a swept sinewave, step function, random noise, or chained PRB sequence.
473 +Calibration output signal actions are launched from the **Waveform** page in the Centaur Web interface. A synthetic waveform signal generator allows you to generate sinewave and pseudo-random binary (PRB) signals on demand. User can configure the sine frequency or PRB pulse width, signal duration and amplitude as well as specify lead-in and lead-out silence intervals before and after the calibration waveform. One can also select and play a calibration file containing any other desired digital time series waveform that by uploading it to the Centaur, such as a swept sinewave, step function, random noise, or chained PRB sequence.
462 462  
463 463  The following sample calibration files are supplied with the Centaur. These files may be used to visually verify functionality and approximate sensitivity of the sensor by inspection of the output waveform:
464 464  
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471 471  === Procedure ===
472 472  
473 473  1. Log-in to the Centaur Web Interface and use the Admin credentials
474 -1. Navigate to the Health page and verify that the sensor is properly levelled and recognised by its serial number.
475 -1. To configure the calibration parameters, navigate to the Waveform page.
476 -1. From the Calibration panel at the top page, select Type from the drop-down list and  choose Sine.
486 +1. Navigate to the **Health** page and verify that the sensor is properly levelled and recognised by its serial number.
487 +1. To configure the calibration parameters, navigate to the **Waveform** page.
488 +1. From the Calibration panel at the top page, select **Type** from the drop-down list and  choose Sine.
477 477  1. For the CTR4 series models, additional option to select between Voltage or Current is available.
478 -1. Click on the Configure button to access the calibration dialog box for the selected Playback.
490 +1. Click on the **Configure** button to access the calibration dialog box for the selected **Playback**.
479 479  1. Configure the signal characteristics by selecting 5V, 30 sec with gain of 1.
480 480  1. Configure the padding before and after the calibration signal, enter 5 seconds.
481 -1. The Duration (s) time can be made shorter or longer as required by user. NOTE, for shorter frequencies a longer duration will be required for the signal to complete its full cycle and to capture the entire waveform on the screen.
493 +1. The **Duration (s)** time can be made shorter or longer as required by user. NOTE, for shorter frequencies a longer duration will be required for the signal to complete its full cycle and to capture the entire waveform on the screen.
482 482  1. Click OK button to close the dialog box and save the settings.
483 483  1. Click the start calibration button  [[image:1733178329484-829.png]] to begin the process. Approximately 5 seconds of time padding ( as set in Step 8) will past before the sensor responds to the injected signal and display the sine wave feedback response.
484 484  1. The calibration will end after 30 seconds (as set in Step 7) or can be terminated manually by pressing the stop button. The calibration will then stop after 5 seconds and any configured lead out silence will be skipped.
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495 495  
496 496  //(originally written by F. Bozinovic November 2024)//
497 497  
498 -Testing solar panels is vital for any remote seismic station, since role of the solar panel ensures that the batteries are kept charged throughout the day. Therefore, reliably testing them ensures only the working panels are installed on remote sites, ensuring success of the site operation and serviceability.
510 +Testing solar panels is vital for any remote seismic station, since the solar panel ensures that the batteries are kept charged throughout the day. Therefore, reliably testing them ensures only the working panels are installed on remote sites, ensuring success of the site operation and serviceability.
499 499  
500 500  This procedure describes the method for testing solar panels and determining how to identify defective panels. The testing of solar panels should be performed outdoors, under bring sun to obtain accurate results.
501 501  
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505 505  )))
506 506  
507 507  
508 -Following materials are required
520 +=== Following materials are required ===
509 509  
510 510  * Solar panel for testing
511 511  * Digital multi-meter (DMM)
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515 515  * Spreadsheet with formulae
516 516  * Marker/ pen
517 517  
518 -Test Method
530 +=== Test Method ===
519 519  
520 520  1. Clearly label each solar panel to keep track of measurements.
521 521  1. Record the manufacturers power rating of the solar panel. **Perform all measurement outdoors under bright sunny conditions! **
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530 530  
531 531  
532 532  
533 -Developing a spreadsheet
545 +=== Developing a spreadsheet ===
534 534  
535 535  Create a spreadsheet with following cells
536 536