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Last modified by Xiaoling on 2025/04/27 16:45
From version 154.3
edited by Xiaoling
on 2022/06/15 09:04
Change comment: There is no comment for this version
To version 167.2
edited by Xiaoling
on 2022/06/15 09:21
Change comment: There is no comment for this version

Summary

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80 80  )))
81 81  
82 82  
83 -[[image:1654847051249-359.png]]
83 +[[image:1655255122126-327.png]]
84 84  
85 85  
86 86  
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88 88  
89 89  * LoRaWAN 1.0.3 Class A
90 90  * Ultra low power consumption
91 -* Distance Detection by Ultrasonic technology
92 -* Flat object range 280mm - 7500mm
93 -* Accuracy: ±(1cm+S*0.3%) (S: Distance)
91 +* Liquid Level Measurement by Ultrasonic technology
92 +* Measure through container, No need to contact Liquid.
93 +* Valid level range 20mm - 2000mm
94 +* Accuracy: ±(5mm+S*0.5%) (S: Measure Value)
94 94  * Cable Length : 25cm
95 95  * Bands: CN470/EU433/KR920/US915/EU868/AS923/AU915/IN865
96 96  * AT Commands to change parameters
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97 97  * Uplink on periodically
98 98  * Downlink to change configure
99 99  * IP66 Waterproof Enclosure
100 -* 4000mAh or 8500mAh Battery for long term use
101 +* 8500mAh Battery for long term use
101 101  
102 -== 1.3  Specification ==
103 103  
104 -=== 1.3.1  Rated environmental conditions ===
104 +== 1.3  Suitable Container & Liquid ==
105 105  
106 -[[image:image-20220610154839-1.png]]
106 +* Solid Wall container such as: steel, iron, glass, ceramics, non-foaming plastics etc.
107 +* Container shape is regular, and surface is smooth.
108 +* Container Thickness:
109 +** Pure metal material.  2~~8mm, best is 3~~5mm
110 +** Pure non metal material: <10 mm
111 +* Pure liquid without irregular deposition.
107 107  
108 -(((
109 -**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);       **
110 110  
111 -**~ b. When the ambient temperature is 40-50 ℃, the highest humidity is the highest humidity in the natural world at the current temperature (no condensation)**
112 -)))
114 +== 1.4  Mechanical ==
113 113  
116 +[[image:image-20220615090910-1.png]]
114 114  
115 115  
116 -=== 1.3.2  Effective measurement range Reference beam pattern ===
119 +[[image:image-20220615090910-2.png]]
117 117  
118 -**(1) The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
119 119  
120 120  
123 +== 1.5  Install LDDS20 ==
121 121  
122 -[[image:1654852253176-749.png]]
123 123  
126 +(% style="color:blue" %)**Step 1**(%%):  Choose the installation point.
124 124  
128 +LDDS20 (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
125 125  
126 -(((
127 -**(2)** **The object to be tested is a "corrugated cardboard box" perpendicular to the central axis of 0 °, and the length * width is 60cm * 50cm.**
130 +[[image:image-20220615091045-3.png]]
131 +
132 +
133 +
134 +(% style="color:blue" %)**Step 2**(%%): Polish the installation point.
135 +
136 +For Metal Surface with paint, it is important to polish the surface, first use crude sand paper to polish the paint level , then use exquisite sand paper to polish the metal level to make it shine & smooth.
137 +
138 +[[image:image-20220615092010-11.png]]
139 +
140 +
141 +No polish needed if the container is shine metal surface without paint or non-metal container.
142 +
143 +[[image:image-20220615092044-12.png]]
144 +
145 +
146 +(% style="color:blue" %)**Step3: **(%%)Test the installation point.
147 +
148 +Power on LDDS75, check if the blue LED is on, If the blue LED is on, means the sensor works. Then put ultrasonic coupling paste on the sensor and put it tightly on the installation point.
149 +
150 +
151 +It is necessary to put the coupling paste between the sensor and the container, otherwise LDDS20 won’t detect the liquid level.
152 +
153 +
154 +
155 +|(((
156 +BLUE LED
128 128  )))
129 129  
159 +[[image:image-20220615091045-6.png]] [[image:image-20220615091045-7.png]]
130 130  
131 -[[image:1654852175653-550.png]](% style="display:none" %) ** **
132 132  
133 133  
163 +After paste the LDDS20 well, power on LDDS20. In the first 30 seconds of booting, device will check the sensors status and BLUE LED will show the status as below. After 30 seconds, BLUE LED will be off to save battery life.
134 134  
165 +
166 +(% style="color:blue" %)LED Status:
167 +
168 +* Onboard LED: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
169 +
170 +* (% style="color:blue" %)BLUE LED(% style="color:red" %) always ON(%%): Sensor is power on but doesn’t detect liquid. There is problem in installation point.
171 +* (% style="color:blue" %)BLUE LED(% style="color:red" %) slowly blinking(%%): Sensor detects Liquid Level, The installation point is good.
172 +
173 +LDDS20 will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
174 +
175 +Note 2:
176 +
177 +Ultrasonic coupling paste is subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally.
178 +
179 +
180 +(% style="color:blue" %)**Step4: **(%%)Install use Epoxy ab glue.
181 +
182 +[[image:image-20220615091045-8.png]]
183 +
184 +Prepare Eproxy AB glue.
185 +
186 +
187 +Put Eproxy AB glue in the sensor and press it hard on the container installation point.
188 +
189 +
190 +Reset LDDS20 and see if the BLUE LED is slowly blinking.
191 +
192 +[[image:image-20220615091045-9.png]]
193 +
194 +(% style="color:red" %)Note1:
195 +
196 +Eproxy AB glue needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
197 +
198 +
199 +(% style="color:red" %)Note 2:
200 +
201 +(% style="color:blue" %)Eproxy AB glue(%%) is subjected in most shipping way. So the default package doesn’t include it and user needs to purchase locally.
202 +
203 +
204 +
205 +
206 +
207 +
135 135  == 1.5 ​ Applications ==
136 136  
137 137  * Horizontal distance measurement
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