Changes for page PS-LB/LS -- LoRaWAN Air Water Pressure Sensor User Manual
Last modified by Xiaoling on 2025/04/19 17:58
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... ... @@ -146,6 +146,18 @@ 146 146 * Operating temperature: 0℃~~50℃ 147 147 * Material: 316 stainless steels 148 148 149 +=== 1.4.3 Wireless Differential Air Pressure Sensor === 150 + 151 +[[image:image-20240511174954-1.png]] 152 + 153 +* Measuring Range: -100KPa~~0~~100KPa,Intermediate range is optional. 154 +* Accuracy: 0.5% F.S, resolution is 0.05%. 155 +* Overload: 300% F.S 156 +* Zero temperature drift: ±0.03%F.S/°C 157 +* Operating temperature: -40℃~~85℃ 158 +* Compensation temperature: 0~~50°C 159 + 160 + 149 149 == 1.5 Application and Installation == 150 150 151 151 === 1.5.1 Thread Installation Type === ... ... @@ -189,6 +189,34 @@ 189 189 [[image:1675071776102-240.png]] 190 190 191 191 204 + 205 +=== 1.5.3 Wireless Differential Air Pressure Sensor === 206 + 207 + 208 +(% style="color:blue" %)**Application:** 209 + 210 +Indoor Air Control & Filter clogging Detect. 211 + 212 +[[image:image-20240513100129-6.png]] 213 + 214 +[[image:image-20240513100135-7.png]] 215 + 216 + 217 +The Wireless Differential Air Pressure Sensor is shipped with the probe and device separately. When user got the device, below is the wiring to for connect the probe to the device. 218 + 219 +[[image:image-20240513093957-1.png]] 220 + 221 + 222 +Size of wind pressure transmitter: 223 + 224 +[[image:image-20240513094047-2.png]] 225 + 226 +Note: The above dimensions are measured by hand, and the numerical error of the shell is within ±0.2mm. 227 + 228 + 229 + 230 + 231 + 192 192 == 1.6 Sleep mode and working mode == 193 193 194 194 ... ... @@ -845,7 +845,28 @@ 845 845 Test the current values at the depth of different liquids and convert them to a linear scale. 846 846 Replace its ratio with the ratio of water to current in the decoder. 847 847 888 +**Example:** 848 848 890 +Measure the corresponding current of the sensor when the liquid depth is 2.04m and 0.51m. 891 + 892 +**Calculate scale factor：** 893 +Use these two data to calculate the current and depth scaling factors：(7.888-5.035)/(2.04-0.51)=1.86470588235294 894 + 895 +**Calculation formula：** 896 + 897 +Use the calibration formula：(Current current - Minimum calibration current)/Scale factor + Minimum actual calibration height 898 + 899 +**Actual calculations：** 900 + 901 +Use this formula to calculate the value corresponding to the current at a depth of 1.5 meters: (6.918-5.035)/1.86470588235294+0.51=1.519810726 902 + 903 +**Error：** 904 + 905 +0.009810726 906 + 907 + 908 +[[image:image-20240329175044-1.png]] 909 + 849 849 = 7. Troubleshooting = 850 850 851 851 == 7.1 Water Depth Always shows 0 in payload ==
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