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Changes for page Testing Procedures

Last modified by robert on 2024/12/09 16:08
From version 9.1
edited by Jack Dent
on 2024/12/09 10:18
Change comment: There is no comment for this version
To version 11.1
edited by Jack Dent
on 2024/12/09 10:37
Change comment: There is no comment for this version

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470 470  
471 471  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.
472 472  
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.
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.
474 474  
475 475  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:
476 476  
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483 483  === Procedure ===
484 484  
485 485  1. Log-in to the Centaur Web Interface and use the Admin credentials
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.
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.
489 489  1. For the CTR4 series models, additional option to select between Voltage or Current is available.
490 -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**.
491 491  1. Configure the signal characteristics by selecting 5V, 30 sec with gain of 1.
492 492  1. Configure the padding before and after the calibration signal, enter 5 seconds.
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.
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.
494 494  1. Click OK button to close the dialog box and save the settings.
495 495  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.
496 496  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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507 507  
508 508  //(originally written by F. Bozinovic November 2024)//
509 509  
510 -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.
511 511  
512 512  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.
513 513  
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517 517  )))
518 518  
519 519  
520 -Following materials are required
520 +=== Following materials are required ===
521 521  
522 522  * Solar panel for testing
523 523  * Digital multi-meter (DMM)
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527 527  * Spreadsheet with formulae
528 528  * Marker/ pen
529 529  
530 -Test Method
530 +=== Test Method ===
531 531  
532 532  1. Clearly label each solar panel to keep track of measurements.
533 533  1. Record the manufacturers power rating of the solar panel. **Perform all measurement outdoors under bright sunny conditions! **
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542 542  
543 543  
544 544  
545 -Developing a spreadsheet
545 +=== Developing a spreadsheet ===
546 546  
547 547  Create a spreadsheet with following cells
548 548  
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624 624  
625 625  Inside the “Vrl (Theoretical)” cell enter the following formula using the corresponding cells.
626 626  
627 -V_{RL}=I_{oc}\times R_L
627 +[[image:Screenshot 2024-12-09 103334.png||height="28" width="141"]]
628 628  
629 -
630 630  Inside the “Rated Power” cell enter the following formula using the corresponding cells.
631 631  
632 -P_{oc}=V_{oc}\times I_{oc}
631 +[[image:Screenshot 2024-12-09 103419.png||height="31" width="157"]]
633 633  
634 -
635 635  Inside the “Load Power” cell enter the following formula using the corresponding cells.
636 636  
637 -P_{RL}=\frac{V_{RL}}{R_L}\times V_{oc}
635 +[[image:Screenshot 2024-12-09 103432.png||height="67" width="176"]]
638 638  
639 639  
640 640  Inside the “Power Loss %” cell enter the following formula using the corresponding cells.
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641 641  
642 642  The calculated values that are negative represent power loss, and positive values are power gain. Performing “conditional formatting” on these cells with colour gradient (defined by colour break limits) would yield visually easy to recognise defective panels.
643 643  
642 +[[image:Screenshot 2024-12-09 103639.png||height="63" width="304"]]
644 644  
645 -Power\ Loss\ \%=\frac{P_{RL}}{P_{oc}}\times 100-100
646 646  
647 -
648 648  Perform all the calculations for each solar panel ID entered.
649 649  
650 650  Solar panels with power loss of 20% or more should be clearly marked as defective and not be used in any future deployments.
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