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100	100	* STOP Mode: 10uA @ 3.3v
101	101	* Max transmit power: 350mA@3.3v
102	102
103		-== 1.4 Suitable Container & Liquid ==
	103	+== 1.4 Rated environmental conditions ==
104	104
105	105
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.
	106	+(% border="1" cellspacing="5" style="background-color:#f2f2f2; width:500px" %)
	107	+|(% style="background-color:#4f81bd; color:white; width:163px" %)**Item**|(% style="background-color:#4f81bd; color:white; width:90px" %)**Minimum value**|(% style="background-color:#4f81bd; color:white; width:70px" %)**Typical value**|(% style="background-color:#4f81bd; color:white; width:87px" %)**Maximum value**|(% style="background-color:#4f81bd; color:white; width:40px" %)**Unit**|(% style="background-color:#4f81bd; color:white; width:50px" %)**Remarks**
	108	+|(% style="width:174px" %)Storage temperature|(% style="width:86px" %)-25|(% style="width:66px" %)25|(% style="width:90px" %)80|(% style="width:48px" %)℃|(% style="width:203px" %)
	109	+|(% style="width:174px" %)Storage humidity|(% style="width:86px" %) |(% style="width:66px" %)65%|(% style="width:90px" %)90%|(% style="width:48px" %)RH|(% style="width:203px" %)(1)
	110	+|(% style="width:174px" %)Operating temperature|(% style="width:86px" %)-15|(% style="width:66px" %)25|(% style="width:90px" %)60|(% style="width:48px" %)℃|(% style="width:203px" %)
	111	+|(% style="width:174px" %)Working humidity|(% style="width:86px" %)(((
	112	+
112	112
113		-(% style="display:none" %)
	114	+
	115	+)))|(% style="width:66px" %)65%|(% style="width:90px" %)80%|(% style="width:48px" %)RH|(% style="width:203px" %)(1)
114	114
115		-== 1.5 Install DDS20-NB ==
116		-
117		-
118		-(% style="color:blue" %)**Step 1**(%%):  ** Choose the installation point.**
119		-
120		-DDS20-NB (% style="color:red" %)**MUST**(%%) be installed on the container bottom middle position.
121		-
122		-[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS20%20-%20LoRaWAN%20Liquid%20Level%20Sensor%20User%20Manual/WebHome/image-20220615091045-3.png?rev=1.1||alt="image-20220615091045-3.png"]]
123		-
124		-
125	125	(((
126		-(% style="color:blue" %)**Step 2**(%%):  **Polish the installation point.**
127		-)))
	118	+(% style="color:red" %)**Remarks: (1) a. When the ambient temperature is 0-39 ℃, the maximum humidity is 90% (non-condensing);       **
128	128
129		-(((
130		-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.
131		-)))
	120	+(% style="color:red" %)** 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)**
132	132
133		-[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/DDS20-LB_LoRaWAN_Ultrasonic_Liquid_Level_Sensor_User_Manual/WebHome/image-20230613143052-5.png?rev=1.1||alt="image-20230613143052-5.png"]]
134		-
135		-
136		-No polish needed if the container is shine metal surface without paint or non-metal container.
137		-
138		-[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/DDS20-LB_LoRaWAN_Ultrasonic_Liquid_Level_Sensor_User_Manual/WebHome/image-20230613143125-6.png?rev=1.1||alt="image-20230613143125-6.png"]]
139		-
140		-
141		-(((
142		-(% style="color:blue" %)**Step3:   **(%%)**Test the installation point.**
	122	+
143	143	)))
144	144
145		-(((
146		-Power on DDS20-NB, 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.
147		-)))
	125	+== 1.5 Effective measurement range Reference beam pattern ==
148	148
149		-(((
150		-It is necessary to put the coupling paste between the sensor and the container, otherwise DDS20-NB won't detect the liquid level.
151		-)))
152	152
153		-(((
154		-After paste the DDS20-NB well, power on DDS20-NB. 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.
155		-)))
	128	+(% style="color:blue" %)**1. The tested object is a white cylindrical tube made of PVC, with a height of 100cm and a diameter of 7.5cm.**
156	156
	130	+[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/1654852253176-749.png?rev=1.1||alt="1654852253176-749.png"]]
157	157
158		-(((
159		-(% style="color:blue" %)**LED Status:**
160		-)))
161	161
162		-* (((
163		-**Onboard LED**: When power on device, the onboard LED will fast blink 4 times which means detect the sensor well.
164		-)))
	133	+(% style="color:blue" %)**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.**
165	165
166		-* (((
167		-(% 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.
168		-)))
169		-* (((
170		-(% style="color:blue" %)**BLUE LED**(% style="color:red" %)** slowly blinking**(%%): Sensor detects Liquid Level, The installation point is good.
171		-)))
	135	+[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/LDDS75%20-%20LoRaWAN%20Distance%20Detection%20Sensor%20User%20Manual/WebHome/1654852175653-550.png?rev=1.1||alt="1654852175653-550.png"]]
172	172
173		-(((
174		-DDS20-NB will enter into low power mode at 30 seconds after system reset or power on, Blue LED will be off after that.
175		-)))
176	176
177		-
178		-(((
179		-(% style="color:red" %)**Note :**(%%)** (% style="color:blue" %)Ultrasonic coupling paste(%%)**(% style="color:blue" %) (%%) is subjected in most shipping way. So the default package doesn't include it and user needs to purchase locally.
180		-)))
181		-
182		-
183		-(((
184		-(% style="color:blue" %)**Step4:   **(%%)**Install use Epoxy ab glue.**
185		-)))
186		-
187		-(((
188		-Prepare Eproxy AB glue.
189		-)))
190		-
191		-(((
192		-Put Eproxy AB glue in the sensor and press it hard on the container installation point.
193		-)))
194		-
195		-(((
196		-Reset DDS20-NB and see if the BLUE LED is slowly blinking.
197		-)))
198		-
199		-[[image:http://wiki.dragino.com/xwiki/bin/download/Main/User%20Manual%20for%20LoRaWAN%20End%20Nodes/DDS20-LB_LoRaWAN_Ultrasonic_Liquid_Level_Sensor_User_Manual/WebHome/image-20230809172509-1.png?rev=1.1||alt="image-20230809172509-1.png"]]
200		-
201		-(((
202		-(% style="color:red" %)**Note :**(% style="color:red; display:none" %)** **
203		-
204		-(% style="color:red" %)**1:**(%%)** (% style="color:blue" %)Eproxy AB glue(%%)** needs 3~~ 5 minutes to stable attached. we can use other glue material to keep it in the position.
205		-)))
206		-
207		-(((
208		-(% style="color:red" %)**2:**(%%)** (% 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.
209		-)))
210		-
211		-
212	212	== 1.6 Applications ==
213	213
214	214
215		-* Smart liquid control solution
	141	+* Horizontal distance measurement
	142	+* Liquid level measurement
	143	+* Parking management system
	144	+* Object proximity and presence detection
	145	+* Intelligent trash can management system
	146	+* Robot obstacle avoidance
	147	+* Automatic control
	148	+* Sewer
	149	+* Bottom water level monitoring
216	216
217		-* Smart liquefied gas solution
218	218
219		-== 1.7 Precautions ==
	152	+== 1.7 Sleep mode and working mode ==
220	220
221	221
222		-* At room temperature, containers of different materials, such as steel, glass, iron, ceramics, non-foamed plastics and other dense materials, have different detection blind areas and detection limit heights.
223		-
224		-* For containers of the same material at room temperature, the detection blind zone and detection limit height are also different for the thickness of the container.
225		-
226		-* When the detected liquid level exceeds the effective detection value of the sensor, and the liquid level of the liquid to be measured shakes or tilts, the detected liquid height is unstable.
227		-
228		-(% style="display:none" %)
229		-
230		-
231		-
232		-== 1.8 Sleep mode and working mode ==
233		-
234		-
235	235	(% style="color:blue" %)**Deep Sleep Mode: **(%%)Sensor doesn't have any LoRaWAN activate. This mode is used for storage and shipping to save battery life.
236	236
237	237	(% style="color:blue" %)**Working Mode:** (%%)In this mode, Sensor will work as LoRaWAN Sensor to Join LoRaWAN network and send out sensor data to server. Between each sampling/tx/rx periodically, sensor will be in IDLE mode), in IDLE mode, sensor has the same power consumption as Deep Sleep mode.
238	238
239	239
240		-== 1.9 Button & LEDs ==
	160	+== 1.8 Button & LEDs ==
241	241
242	242
243	243	[[image:Main.User Manual for LoRaWAN End Nodes.D20-LBD22-LBD23-LB_LoRaWAN_Temperature_Sensor_User_Manual.WebHome@1675071855856-879.png]]