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Product references of this package:
TABLE OF CONTENTS
TABLE OF CONTENTS
1. PRODUCT PRESENTATION
1.1. Product and assembly description
The Double-level-sensor is a ready to use product enabling the detection of a double level of liquid.
The package is composed by a DRY CONTACTS transceiver and a double-level sensor.
Default settings have been established to simplify product installation by the user.
1.2. Package installation
To insure the best operation of the package it is important to correctly position the different units
1.2.1 Double-level sensor
The double-level sensor must be fixed vertically, being perpendicular to the fluid surface.
Example of an installation in a tank: Example of an installation in a pipe:
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The double-level sensor is made of 304 stainless steel to be compatible with all types of non corrosive fluids. It can withstand a maximum temperature of 120 ° C and a maximum pressure of 5MPa (=50 bars).
1.2.2 The DRY CONTACTS transceiver
There are two key rules to optimize radio ranges.
• The first one consists of positioning your product as high as possible.
• The second one consists of limiting the number of obstacles in order to avoid excessive attenuation of the radio wave.
Position: Insofar as possible, install the transmitter at a minimum height of 1.50 m and do not attach it to the wall.
Obstacles: Ideally, the product must be 20 cm away from any obstacle and, if possible, near an opening (the closer the obstacle is, the more the emitted power will be absorbed). All the materials encountered by a radio wave will attenuate it. Bear in mind that metal (metal cabinets, beams, etc.) and concrete (reinforced concrete, partitions, walls, etc.) are the most critical materials for the propagation of radio waves.
1.3. Starting up the product using a magnet
Once the product has been configured and its assembly has been finalized, the product is ready to be started up.
The start-up is carried out using a magnet which you place on the upper part of the product (cf. the diagram below). The magnet must be held in position for at least 6 seconds so as to confirm the start-up of the product. When the magnet is well detected, the green LED lights up for 1 second (LED light visible under the product).
Once the sensor validates its start-up, it immediately transmits status frames followed by a data frame (according the defined periodicity).
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1.4. Using the product with the default configuration
Once the transceiver started-up, it is programmed to send a 0x40 frame each time the state of one of the two sensors is changing (top sensor and down sensor). To avoid any loose of data, a periodic sending of this frame is configured every 12 hours, being twice a day.
Byte 2 and 3 : information on the top level sensor (TOR1)
• 0x0000 = no change of state detected (no event)
• 0x00yy = yy determine the total number of changes on the sensor state (in hexadecimal) after a waiting period of 100 ms
Byte 4 and 5 : information on the down level sensor (TOR2)
• 0x0000 = no change of state detected (no event)
• 0x00yy = yy determine the total number of changes on the sensor state (in hexadecimal) after a waiting period of 100 ms
Remark : the counters continue to count the possible change of state of the sensors even if the sending of the frame is ongoing.
Byte 6 to 9 : information on TOR 3 and 4, unused in this package (not cabled)
• 0x0000 = by default because not used
Byte 10 : detailed information on TORs states :
• <0> TOR1 : Current state
• <1> TOR1 : State of the sensor at the last frame
• <2> TOR2 : Current state
• <3> TOR2 : State of the sensor at the last frame
• <4> TOR3 : Current state
• <5> TOR3 : State of the sensor at the last frame
• <6> TOR4 : Current state
• <7> TOR4 : State of the sensor at the last frame
Remark : if the sending of the 0x40 frame is too regular or if one of the counter value is regularly higher than 1, it could be interesting to increase the waiting period to limit false detection.
1.5. Change of settings
The package is proposed with defaults settings explained above. For any change on the transceiver configuration, refer to the DRY CONTACTS
User Guide available on our website https://www.adeunis.com/en/produit/dry-contacts-2/