Changes for page SPH01-LB -- LoRaWAN Soil pH Sensor User Manual
Last modified by Xiaoling on 2024/01/15 09:36
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... ... @@ -556,20 +556,19 @@ 556 556 557 557 == 2.7 Calibration == 558 558 559 +Step1 : Clean probe 559 559 560 -(% style="color:blue" %)**Step1 :(%%) Clean probe** 561 - 562 562 user can use high grade sandpaper to polish it or put in 5% hydrochloric acid for several minutes. After the metal probe looks new, users can clean it to remove hydrochloric acid or other liquids from the surface. 563 563 564 - (% style="color:blue" %)**Step2 :(%%)Immerse the sensor in ph buffer solution to make the sensor values stable**563 +Step2 : Immerse the sensor in ph buffer solution to make the sensor values stable 565 565 566 566 ((( 567 567 User can do calibration for the probe. It is limited to use below pH buffer solution to calibrate: 4.00, 6.86, 9.18. When calibration, user need to clean the electrode and put the probe in the pH buffer solution to wait the value stable ( a new clean electrode might need max 24 hours to be stable). 568 568 569 - **Note:Only one ph buffer with one of the ph values needs to be calibrated during calibration. Wait for the sensor measurement value to be stable, it does not need to be the same as the ph marked by the ph buffer**568 +Note:Only one ph buffer with one of the ph values needs to be calibrated during calibration. Wait for the sensor measurement value to be stable, it does not need to be the same as the ph marked by the ph buffer 570 570 571 571 572 - (% style="color:blue" %)**Step3 :(%%)The numerically stable sensors were calibrated using commands**571 +Step3 : The numerically stable sensors were calibrated using commands 573 573 ))) 574 574 575 575 ((( ... ... @@ -611,6 +611,7 @@ 611 611 612 612 * LoRaWAN Downlink. Instruction for different platforms: See [[IoT LoRaWAN Server>>url:http://wiki.dragino.com/xwiki/bin/view/Main/]] section. 613 613 613 + 614 614 When the command is successfully used, the node sends a uplink. 615 615 This is the payload for uplink 616 616 ... ... @@ -639,8 +639,10 @@ 639 639 640 640 * Reply to non-confirmed packet: 14 00 641 641 642 - (% style="color:blue" %)**Step4:(%%)After the calibration is completed, its measurement results in this ph buffer solution should be consistent with the numerical value of the command used in the calibration.**642 +Step4: 643 643 644 +After the calibration is completed, its measurement results in this ph buffer solution should be consistent with the numerical value of the command used in the calibration 645 + 644 644 Examples: 645 645 After using the command AT+PH=9 in 9.18ph buffer 646 646 The readout returned by the sensor in 9.18ph buffer should be pH=9