Page 3
Determining the installation length by measuring with a tape measure ............... 19 Determining the installation length (B) at the measuring point ................19 Electric contact gauge ............................. 19 Determining the installation length with ADT1-LR remote transmission unit ............20 ADT1-LR order information ..........................22 Variants and options ............................... 22 Accessories................................
This device can be linked with digital level sensors and pressure transmitters with the KELLER “D” and “X” low voltage With its wide range of water level sensors and pressure transmitters, KELLER can offer the right solu- product lines.
The range of communication is around 2km in a dense urban area, and up to 15km in rural areas and is influenced by the position of the ADT1-LR and of the gateway, if the gateway is mounted in a high place the cover will be major than it is mounted in a low place.
Hardware ADT1-Tube-LR At just 43 mm in diameter, the cylindrical design of the ADT1-Tube-LR can simply be placed into the top of a two-inch- wide sounding tube standard in the groundwater measuring industry. It can be installed in a matter of seconds. The housing is designed to withstand condensation and temporary flooding.
To open the ADT1-LR Tube housing, push at the marked positions against the bottom of the housing/piston (see illustration below). The ADT1-LR Box can be easily opened with a Screwdriver PZ1, unscrew the four screws and carefully open the lid.
Connecting the antenna Screw the stub antenna into the corresponding SMA plug located at the top of the ADT1-LR and tighten it by hand only. Make sure it is tight enough. CAUTION: Please only use the original accessories to prevent injuries and health risks. The Monopole antenna may have an ampli- fication of a maximum of 1.04 dBi in the relevant frequency range.
Page 9
NOTE: If a level sensor with a reference tube is used, the reference tube is simply inserted into the housing as shown in the figure. CAUTION: For cable diameters in the range of 3.5 to 6.4 mm only CAUTION: The maximum cable length for the I C interface is limited due to the datasheet of the respective sensor and is usually only a few meters (typically up to 3m).
Locking unit (Tube only) The locking unit for the ADT1-LR Tube with antenna cover is available in sizes from 2 up to 6 inches. The sealed antenna can be covered by a lockable protective cap made of robust plastic. This protects the data logger against theft and damage by people or wild animals when level measurements are being taken in the open countryside.
Connection Terminal for the Sensors The ADT1-LR offers the possibility to connect a low-cost I C or a more precise RS485 Sensor of KELLER. The pin assignment of the ADT1-LR is shown as follows: 3.10.1 Connection for X-Line (RS485-Interface) “low voltage” type only Connect the black wire to the +3.5V supply voltage and...
After a random delay of 0 … 6 seconds, the ADT1-LR sends the measurements. If the device has not joined the RaWAN® network yet, it will try to join until it succeeds (maximum 3 attempts per transmission). Afterward, it will transmit the data.
The value displayed in the “ADT1-LR Configuration” and the “KOLIBRI Cloud“ is the battery capacity calculated by the ADT1-LR as a percentage of remaining capacity. It is recommendable to change the battery if the value is less than 20%. Once the battery has been changed the value is once again shown as 99%.
All measured values are stored in the ADT1-LR’s EEPROM. The memory is organized as a circular memory. This means that always the latest data is available whilst the oldest data is overwritten.
Device Registration Before a device can communicate via The Things Network you need to register it with an application. The ADT1-LR is preconfigured on the open-source, decentralized network called “The Things Network“ on our KELLER TTN account. TTN is a contributor member of the LoRa Alliance and provides a set of open tools and a global, open network to connect things.
Adaptive Data Rate (ADR) is a mechanism for optimizing data rates, airtime, and energy consumption in the network. ADR should be enabled for static devices, like the ADT1-LR. To determine the optimal data rate, the network needs some measurements (uplink messages). The network calculates the so-called “margin”, which is used to determine how much the network can increase the data rate or lower the trans-...
At the same time, the different types of water level calculations are listed. The focus of the description is for ADT1-LR data transmission units with a level probe and the determination of the in- stallation length.
Water level calculation types There are essentially 3 different calculation types. 8.4.1 Water height above probe At water height above probe (E), the water column/water height above the probe is measured. 8.4.2 Depth to water At depth to water (F), the distance from the upper edge of the measuring point to the water surface is determined. For the calculation of the depth upper edge of the measuring point to the water surface, the installation length B must be known.
Determining the installation length by measuring with a tape measure The installation length (B) can be determined by measuring from the upper edge of the remote transmission unit to the level probe (marker) with a tape measure. For this purpose, the level probe must be mounted to the remote transmission unit and then laid out on the ground. Make sure that the cable of the level probe is taut, so that measurement errors are avoided.
Determining the installation length with ADT1-LR remote transmission unit Since the ADT1-LR remote transmission unit has no external connector for the interface, the level measurement e must be performed with the housing open. Note that the housing length must then be added to the measurement result to obtain the correct installation length.
Page 21
Thus, the height of the water column e above the sensor is 0.7075 m. To this value must now be added the length of the inner part of the ADT1-LR housing, 16.5 cm. Water column e = 0.2275 m + 0.165 m = 0.3925 m By adding the distance of the upper edge to the water surface F and water height e, the installation length B is ob- tained.
ADT1-LR order information Variants and options Description Product number Picture ADT1-Tube, LoRa, stub antenna, batteries ADT1-Tube-LR 320060.0004 ADT1-Box, LoRa, stub antenna, batteries ADT1-Box-LR 320060.0001 Accessories Description Product number Picture Locking Unit 2’’ 509210.0001 3’’ 509210.0002 4’’ 509210.0003 5’’ 509210.0004 6’’...
Page 23
331005.0005 Antenna 320020.0133 Antenna for manhole cover with SMA connection Cable length: 2m 508620.0023 O-Ring 35x1.5 mm (cable gland side) 702505.0007 Silicagel bag, 5 g Version 12/2023 Page 23 of 29...
Test condition (IPX7 / IPX8) The devices have been subjected to a type test at KELLER AG, where they are completely submerged in an immersion basin. The immersion depth as well as the test duration are carried out according to the specified definitions. Devices with optional IPX7/IPX8 protection are subjected to a final test in a water bath.
Page 25
2 meters for a maximum of 24 hours (requirement defined by KELLER AG) Note: The information given refers to clear water; other liquids, e.g., salt water, soapy water, alcohol, or heated liquids, do not provide protection.
Regulatory Statements of the radio module 11.1 FCC and ISED Regulatory notices / Avis réglementaires de FCC et ISDE Model FCC ID ADT1-Tube-LR Contains transmitter module FCC ID: VPYCMABZ ADT1-Box-LR Model / Modèle ISED Certification Number / Num. de certification ISDE ADT1-Tube-LR Contains IC / Contient IC: 772C-CMABZ ADT1-Box-LR...
11.2 Antenna This radio transmitter has been approved by FCC and ISED to operate with the antenna types listed below with the maximum permissible gain indicated. Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited for use with this device.
Need help?
Do you have a question about the ADT1-LR and is the answer not in the manual?
Questions and answers