Changes for page Water Quality Sensors

Last modified by Karry Zhuang on 2025/02/18 15:43
<
From version < 27.1 >
edited by Karry Zhuang
on 2024/07/18 19:32
To version < 30.1 >
edited by Karry Zhuang
on 2024/07/18 19:51
>
Change comment: Uploaded new attachment "image-20240718195058-7.png", version {1}

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... ... @@ -205,11 +205,10 @@
205 205  |=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address high|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address low|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Quantity high|=(% style="width: 1px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 high
206 206  |(% style="width:99px" %)0X11|(% style="width:112px" %)0X06|(% style="width:135px" %)0X00|(% style="width:126px" %)0X26|(% style="width:85px" %)0X00|(% style="width:1px" %)0X02|(% style="width:1px" %)0XEB|(% style="width:1px" %)0X50
207 207  
208 -
209 209  = 2. DR-PH01 Water PH Sensor =
210 210  
211 211  
212 -== 2.1 Specification:[[Edit>>url:http://wiki.dragino.com/xwiki/bin/edit/Main/Water%20Quality%20Sensors/WebHome?section=2]] ==
211 +== 2.1 Specification ==
213 213  
214 214  * **Power Input**: DC7~~30
215 215  * **Power Consumption** : < 0.5W
... ... @@ -293,7 +293,6 @@
293 293  |=(% style="width: 50px;background-color:#4F81BD;color:white" %)New address|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 106px; background-color: rgb(79, 129, 189); color: white;" %)Data length|=(% style="width: 93px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 104px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
294 294  |(% style="width:99px" %)0X01|(% style="width:112px" %)0X03|(% style="width:106px" %)0X00|(% style="width:93px" %)0X20|(% style="width:104px" %)0XF0
295 295  
296 -
297 297  === 2.6.2 Change address ===
298 298  
299 299  For example: Change the address of the sensor with address 1 to 2, master → slave
... ... @@ -329,7 +329,6 @@
329 329  0XA5
330 330  )))
331 331  
332 -
333 333  === 2.6.4 Query data ===
334 334  
335 335  
... ... @@ -382,9 +382,116 @@
382 382  
383 383  = 3. DR-ORP1 Water ORP Sensor =
384 384  
385 -== 3.7 RS485 Commands ==
386 386  
387 387  
384 +== 3.1 Specification ==
385 +
386 +* **Power Input**: DC7~~30
387 +* **Power Consumption** : < 0.5W
388 +* **Interface**: RS485. 9600 Baud Rate
389 +* **Measurement error**: ±3mV
390 +* **Stability**: ≤2mv/24 hours
391 +* **Equipment working conditions**: Ambient temperature: 0-60℃ Relative humidity: <85%RH
392 +* **IP Rated**: IP68
393 +* **Max Pressure**: 0.6MPa
394 +
395 +== 3.2 Wiring ==
396 +
397 +
398 +== 3.3 Mechinical Drawing ==
399 +
400 +[[image:image-20240714174241-2.png]]
401 +
402 +== 3.4 Installation Notice ==
403 +
404 +Do not power on while connect the cables. Double check the wiring before power on.
405 +
406 +Installation Photo as reference:
407 +
408 +**~ Submerged installation:**
409 +
410 +The lead wire of the equipment passes through the waterproof pipe, and the 3/4 thread on the top of the equipment is connected to the 3/4 thread of the waterproof pipe with raw tape. Ensure that the top of the equipment and the equipment wire are not flooded.
411 +
412 +[[image:image-20240718191348-6.png]]
413 +
414 +**~ Pipeline installation:**
415 +
416 +Connect the equipment to the pipeline through the 3/4 thread.
417 +
418 +[[image:image-20240718191336-5.png||height="239" width="326"]]
419 +
420 +
421 +=== 6.3.5 Maintenance ===
422 +
423 +
424 +(1) The equipment itself generally does not require daily maintenance. When an obvious fault occurs, please do not open it and repair it yourself, and contact us as soon as possible.
425 +(2) In general, ORP electrodes do not need to be calibrated and can be used directly. When there is doubt about the quality and test results of the ORP electrode, the electrode potential can be checked with an ORP standard solution to determine whether the ORP electrode meets the measurement requirements, and the electrode can be recalibrated or replaced with a new ORP electrode. The frequency of calibration or inspection of the measuring electrode depends on different application conditions (the degree of dirt in the application, the deposition of chemical substances, etc.).
426 +(3) There is an appropriate soaking solution in the protective bottle at the front end of the electrode, and the electrode head is soaked in it to ensure the activation of the platinum sheet and the liquid junction. When measuring, loosen the bottle cap, pull out the electrode, and rinse it with pure water before use.
427 +(4) Preparation of electrode soaking solution: Take 25 grams of analytical pure potassium chloride and dissolve it in 100 ml of pure water to prepare a 3.3M potassium chloride solution.
428 +(5) Before measuring, the bubbles in the electrode glass bulb should be shaken off, otherwise it will affect the measurement. When measuring, the electrode should be stirred in the measured solution and then placed still to accelerate the response.
429 +(6) The electrode should be cleaned with deionized water before and after the measurement to ensure the measurement accuracy.
430 +(7) After long-term use, the ORP electrode will be passivated, which is manifested as a decrease in sensitivity gradient, slow response, and inaccurate readings. At this time, the platinum sheet at the bottom of the electrode can be soaked in 0.1M dilute hydrochloric acid for 24 hours (0.1M dilute hydrochloric acid preparation: 9 ml of hydrochloric acid is diluted to 1000 ml with distilled water), and then soaked in 3.3M potassium chloride solution for 24 hours to restore its performance.
431 +(8) Electrode contamination or liquid junction blockage can also cause electrode passivation. At this time, it should be cleaned with an appropriate solution according to the nature of the contaminant. If the platinum of the electrode is severely contaminated and an oxide film is formed, toothpaste can be applied to the platinum surface and then gently scrubbed to restore the platinum's luster.
432 +(9) The equipment should be calibrated before each use. It is recommended to calibrate once every 3 months for long-term use. The calibration frequency should be adjusted appropriately according to different application conditions (degree of dirt in the application, deposition of chemical substances, etc.). After aging, the electrodes should be replaced in time.
433 +
434 +== 3.6 RS485 Commands ==
435 +
436 +
437 +RS485 signaldefault address 0x13
438 +Standard Modbus-RTU protocol, baud rate: 9600; check bit: none; data bit: 8; stop bit: 1
439 +
440 +=== 3.6.1 Query data ===
441 +
442 +send
443 +
444 +(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
445 +|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Original address|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address high|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address low|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Quantity high|=(% style="width: 1px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 high
446 +|(% style="width:99px" %)0XFE |(% style="width:112px" %)0X03|(% style="width:135px" %)0X00|(% style="width:126px" %)0X50|(% style="width:85px" %)0X00|(% style="width:1px" %)0X00|(% style="width:1px" %)0X51|(% style="width:1px" %)0XD4
447 +
448 +response
449 +
450 +(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:561.333px" %)
451 +|=(% style="width: 50px;background-color:#4F81BD;color:white" %)New address|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 106px; background-color: rgb(79, 129, 189); color: white;" %)Data length|=(% style="width: 93px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 104px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
452 +|(% style="width:99px" %)0X01|(% style="width:112px" %)0X03|(% style="width:106px" %)0X00|(% style="width:93px" %)0X20|(% style="width:104px" %)0XF0
453 +
454 +
455 +
456 +=== 3.6.2 Change address ===
457 +
458 +For example: Change the address of the sensor with address 1 to 2, master → slave
459 +
460 +(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
461 +|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Original address|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address high|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address low|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Quantity high|=(% style="width: 1px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 high
462 +|(% style="width:99px" %)0X01|(% style="width:112px" %)0X06|(% style="width:135px" %)0X00|(% style="width:126px" %)0X50|(% style="width:85px" %)0X00|(% style="width:1px" %)0X02|(% style="width:1px" %)0X08|(% style="width:1px" %)0X1A
463 +
464 +If the sensor receives correctly, the data is returned along the original path.
465 +Note: If you forget the original address of the sensor, you can use the broadcast address 0XFE instead. When using 0XFE, the host can only connect to one slave, and the return address is still the original address, which can be used as a method of address query.
466 +
467 +
468 +=== 3.6.3 Modify intercept ===
469 +
470 +send
471 +
472 +(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
473 +|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address high|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address low|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Quantity high|=(% style="width: 1px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 high
474 +|(% style="width:99px" %)0X13|(% style="width:112px" %)0X06|(% style="width:135px" %)0X00|(% style="width:126px" %)0X10|(% style="width:85px" %)0X00|(% style="width:1px" %)0X64|(% style="width:1px" %)0X8A|(% style="width:1px" %)(((
475 +0X96
476 +)))
477 +
478 +Change the intercept of the sensor with address 1 to 10 (default 0), which is 0X000A in the command.
479 +
480 +response
481 +
482 +(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:676.25px" %)
483 +|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Function code|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address high|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Address low|=(% style="width: 50px;background-color:#4F81BD;color:white" %)Quantity high|=(% style="width: 1px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 low|=(% style="width: 50px;background-color:#4F81BD;color:white" %)CRC16 high
484 +|(% style="width:99px" %)0X13|(% style="width:112px" %)0X06|(% style="width:135px" %)(((
485 +0X00
486 +)))|(% style="width:126px" %)0X10|(% style="width:85px" %)0X00|(% style="width:1px" %)0X64|(% style="width:1px" %)0X8A|(% style="width:1px" %)(((
487 +0X96
488 +)))
489 +
490 +=== 3.6.4 Query data ===
491 +
388 388  The address of the ORP sensor is 13
389 389  
390 390  The query data command is 13 03 00 00 00 01 87 78
... ... @@ -394,6 +394,32 @@
394 394  02 AE is the ORP value, converted to decimal, the actual value is 686, 02 AE means the current ORP value is 686mV
395 395  
396 396  
501 +=== 3.6.5 Calibration Method ===
502 +
503 +This device uses two-point calibration, and two known ORP standard solutions need to be prepared. The calibration steps are as follows:
504 +(1) Place the electrode in distilled water to clean it, and then place it in 86mV standard buffer solution. After the data stabilizes,
505 +enter the following calibration command, and the 86mV point calibration is completed;
506 +
507 +(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
508 +|=(% style="width: 64px; background-color: rgb(79, 129, 189); color: white;" %)Address|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 66px; background-color: rgb(79, 129, 189); color: white;" %)Address high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Address low|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Quantity high|=(% style="width: 70px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 55px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 55px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
509 +|(% style="width:64px" %)0X13|(% style="width:72px" %)0X06|(% style="width:66px" %)(((
510 +0X00
511 +)))|(% style="width:68px" %)0X24|(% style="width:72px" %)0XFF|(% style="width:70px" %)0XFF|(% style="width:55px" %)0XCB|(% style="width:55px" %)(((
512 +0X03
513 +)))
514 +
515 +Wash the electrode in distilled water and place it in 256mV standard buffer. After the data is stable, enter the following calibration command to complete the 256mV point calibration.
516 +
517 +(% border="1" cellspacing="3" style="background-color:#f2f2f2; width:575.333px" %)
518 +|=(% style="width: 64px; background-color: rgb(79, 129, 189); color: white;" %)Address|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Function code|=(% style="width: 66px; background-color: rgb(79, 129, 189); color: white;" %)Address high|=(% style="width: 68px; background-color: rgb(79, 129, 189); color: white;" %)Address low|=(% style="width: 72px; background-color: rgb(79, 129, 189); color: white;" %)Quantity high|=(% style="width: 70px; background-color: rgb(79, 129, 189); color: white;" %)Quantity low|=(% style="width: 55px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 low|=(% style="width: 55px; background-color: rgb(79, 129, 189); color: white;" %)CRC16 high
519 +|(% style="width:64px" %)0X13|(% style="width:72px" %)0X06|(% style="width:66px" %)(((
520 +0X00
521 +)))|(% style="width:68px" %)0X25|(% style="width:72px" %)0XFF|(% style="width:70px" %)0XFF|(% style="width:55px" %)0X9A|(% style="width:55px" %)(((
522 +0XC3
523 +)))
524 +
525 +
526 +
397 397  = 4. DR-DO1 Dissolved Oxygen Sensor =
398 398  
399 399  == 4.7 RS485 Commands ==
image-20240718195058-7.png
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