netvox R718WA2 Wireless 2-Gang Water Leak Detector User Manual

Wireless 2-Gang Water Leak Detector
R718WA2
User Manual

Copyright© Netvox Technology Co., Ltd.
This document contains proprietary technical information which is the property of NETVOX Technology. It shall be maintained in strict confidence and shall not be disclosed to other parties, in whole or in part, without the written permission of NETVOX Technology. The specifications are subject to change without prior notice.

Introduction

This device is an alarm device for 2-way leak detection. When the water sensor detects a leak, it will send an alarm message to the gateway. When the water sensor detects that there is no water leak again, it will send a back to normal status message to the gateway, which uses the SX1276 wireless communication module.
LoRa Wireless Technology:
Lora is a wireless communication technology dedicated to long-distance and low power consumption. Compared with other communication methods, the LoRa spread spectrum modulation method greatly increases to expand the communication distance. Widely used in long-distance, low-data wireless communications. Examples, automatic meter reading, building automation equipment, wireless security systems, and industrial monitoring. Main features include small size, low power consumption, transmission distance, anti-interference ability, and so on.
LoRaWAN:
LoRaWAN uses LoRa technology to define end-to-end standard specifications to ensure interoperability between devices and gateways from different manufacturers.

Appearance

Main Features

• Adopt SX1276 wireless communication module
• 2 ER14505 battery AA SIZE (3.6V / section) parallel power supply
• Can detect two voltage values and two water leakage status
• The base is attached with a magnet that can be attached to a ferrous object
• Protection class: Main body IP65/IP67 (optional), Sensor IP67
• Compatible with LoRaWAN™ Class A
• Frequency-hopping spread spectrum
• Configuration parameters can be configured via a third-party software platform, data can be read and alarms can be set via SMS text and email (optional)
• Applicable to third-party platforms: Actility/ThingPark, TTN, MyDevices/Cayenne
• Low power consumption and long battery life
  Note:
  Battery life is determined by the sensor reporting frequency and other variables, please refer to http://www.netvox.com.tw/electric/electric_calc.html
  On this website, users can find the battery life of various models in different configurations.

Set up Instruction

On/Off

indicator flashes once.
Turn off (Restore to factory setting)| Press and hold the function key for 5 seconds till the green indicator flashes 20 times.
Power off| Remove Batteries.
Note| 1. Remove and insert the battery; the device is at off state by default. Press and hold the function key for 3 seconds till the green indicator flashes once to turn on the device.
2. On/off interval is suggested to be about 10 seconds to avoid the interference of capacitor inductance and other energy storage components.
3. At 1t -5’h second after power on, the device will be in engineering test mode.

Network Joining

Never joined the network| Turn on the device to search the network to join the network.
The green indicator stays on for 5 seconds: success
The green indicator remains off: fail
---|---
Had joined the network (not at factory setting mode)| Turn on the device to search the previous network to join the network.
The green indicator stays on for 5 seconds: success
The green indicator remains off: fail
Fail to join the network (when the device is on)| Suggest checking the device verification information on the gateway or consulting your platform service provider.

Function Key

Press and hold for 5 seconds| Restore to factory setting / Turn off
The green indicator flashes for 20 times: success The green indicator remains off: fail
---|---
Press once| The device is in the network: the green indicator flashes once and sends a report The device is not in the network: the green indicator remains off

Sleeping Mode

The device is on and in the network| Sleeping period: Min Interval.
When the report change exceeds the setting value or the state changes: send a data report according to Min Interval.
---|---

Low Voltage Warning

Data Report

The device will immediately send a version package Report and report data with leak detection status and voltage value. The device sends data in the default configuration before any configuration is done.
Default setting:
Max Time: 60min
Min Time: 60min ( by default, the current-voltage value is detected every Min Interval )
Battery Voltage Change: 0x01 (0.1V)
Note:
The data sending cycle will be programmed before shipment. The interval between two reports must be the minimum time
Water leak detection:
When the leak sensor is immersed in water, it will immediately issue a report, leaking status:1.
When the leak sensor is out of the immersion state, a report is issued immediately, with no water leakage status: 0.
The data can be decoded by the Netvox LoRaWAN Application Command document and http://www.netvox.com.cn:8888/page/index

Data report configuration and sending period are as follows:

Min. Interval (Unit: second)| Max. Interval (Unit: second)| Reportable Change| Current Change? Reportable Change| Current Change < Reportable Change
---|---|---|---|---
Any number between
1-65535| Any number between
1-65535| Can not be 0.| Report
per Min. Interval| Report
per Max. Interval

5.1 Example of ReportDataCmd
FPort ：0x06

Version – 1 byte –0x01——the Version of NetvoxLoRaWAN Application Command Version
DeviceType – 1 byte – Device Type of Device
The device type is listed in Netvox LoRaWAN Application Devicetype doc
ReportType – 1 byte –the presentation of the NetvoxPayLoad Data according to the device type
NetvoxPayLoadData – Fixed bytes (Fixed =8bytes)

(5Bytes, fixed Ox00)

Uplink: 0146012200010000000000

5.2 Example of ConfigureCmd
FPort：0x07

Camden – 1 byte
DeviceType – 1 byte – Device Type of Device
NetvoxPayLoadData – var bytes (Max=9bytes)

Description| Device| Cmd ID| Device Type| NetvoxPayLoadData
---|---|---|---|---
Config
ReportReq| R718WA2| Ox0 I| 0x46| Minime
(2bytes Unit:s)| Maxime
(2bytes Unit:s)| BatteryChange
(byte Unit:0.1v)| Reserved
(4Bytes, Fixed Ox00)
Config
reporters| 0x81| Status (OxOO_success)| Reserved (8Bytes, Fixed Ox00)
ReadConfig
ReportReq| 0x02| Reserved (9Bytes, Fixed Ox00)|
ReadConfig
reporters| 0x82| Minime (2bytes Units:s)| Maxime
(2bytes Unit:s)| BatteryChange
(1 byte Unit:0.1v)| Reserved
(4Bytes, Fixed Ox00)

1. Configure device parameters MinTime = 1min, Maxime = 1min, BatteryChange = 0.1v
   Downlink: 0146003C003C0100000000
   The device returns:
   8146000000000000000000 (configuration is successful)
   8146010000000000000000 (configuration is failed)

2. Read device configuration parameters
   Downlink: 0246000000000000000000
   The device returns:
   8246003C003C0100000000 (device current configuration parameter)

5.3 Example for MinTime/Maxime logic
Example#1 based on MinTime = 1 Hour, MaxTime= 1 Hour, Reportable Change i.e. BatteryVoltageChange=0.1V

Note: MaxTime=MinTime. Data will only be reported according to MaxTime (MinTime) duration regardless BatteryVoltageChange value.
Example#2 based on MinTime = 15 Minutes, MaxTime= 1 Hour, Reportable Change i.e. BatteryVoltageChange= 0.1V.

Example#3 based on MinTime = 15 Minutes, MaxTime= 1 Hour, Reportable Change i.e. BatteryVoltageChange= 0.1V.

Notes:

1. The device only wakes up and performs data sampling according to MinTime Interval. When it is sleeping, it does not collect data.
2. The data collected is compared with the last data reported. If the data variation is greater than the ReportableChange value, the device reports according to MinTime interval. If the data variation is not greater than the last data reported, the device reports according to MaxTime interval.
3. We do not recommend setting the MinTime Interval value too low. If the MinTime Interval is too low, the device wakes up frequently and the battery will be drained soon.
4. Whenever the device sends a report, no matter resulting from data variation, button pushed or MaxTime interval, another cycle of MinTime/MaxTime calculation is started.

Installation

This product comes with a waterproof function. When using it, the back of it can be adsorbed on the iron surface, or the two ends can be fixed to the wall with screws.
Note: To install the battery, use a screwdriver or similar tool to assist in opening the battery cover.

1. he Wireless 2-Gang Water Leak Detector (R718WA2) has a built-in magnet (as Figure 1 below). When installed, it can be attached to the surface of an object with iron which is convenient and quick.
   To make the installation more secure, use screws (purchased) to secure the unit to a wall or other surface (as Figure 2 below).
   Note: Do not install the device in a metal shielded box or in an environment with other electrical equipment around it to avoid affecting the wireless transmission of the device.
   

2. Tear off the 3M glue at the bottom of the sensor probe and stick it on the flat ground where water leakage may accumulate.
   As shown in the enlarged picture on the right:
   

3. When the sensor probe detects water leakage, the water leakage detector device will send “alarm” information. Remove the probe from the accumulated water leakage position, and dry the remaining water in the sensor. The device returns to the “normal” state and sends the “normal” state information.

Wireless 2-Gang Water Leak Detector (R718WA2) could be applied to the following scenarios:

• Datacenter and engine room
• Document storage center
• Basement water leakage monitoring
• Water pipe leakage detection
• Bilge monitoring

The device is designed to detect water leakage and is not suitable for detecting harmful chemicals, solvents, oils, fuels, strong acids or other corrosive liquids.

*Take R718WA (single way) as the schematic diagram
Battery installation steps (Take R718A as the schematic diagram) Please replace the battery with professionals! The device must use 2 sections of ER14505 battery (3.6V/section) Please note that the positive and negative poles of the battery should not be installed reversely.
Step 1: Unscrew the four corners of the device with a screwdriver, as shown in the red circle below.

Step 2: Put the batteries into the battery bay of the device and note the positive and negative poles of the battery, please do not insert the battery reversely.

Step 3: After inserting the batteries, put the lid back on and tighten the four screws.

Note:
Please do not disassemble the device unless it is required to replace the batteries. Do not touch the waterproof gasket, LED indicator light, or function keys when replacing the batteries. Please use a suitable screwdriver to tighten the screws (if using an electric screwdriver, it is recommended to set the torque as 4kgf) to ensure the device is impermeable.

Information about Battery Passivation

Many Netvox devices are powered by 3.6V ER14505 Li-SOCl2 (lithium-thionyl chloride) batteries that offer many advantages including low self-discharge rate and high energy density.
However, primary lithium batteries like Li-SOCl2 batteries will form a passivation layer as a reaction between the lithium anode and thionyl chloride if they are in storage for a long time or if the storage temperature is too high. This lithium chloride layer prevents rapid self-discharge caused by a continuous reaction between lithium and thionyl chloride, but battery passivation may also lead to voltage delay when the batteries are put into operation, and our devices may not work correctly in this situation.
As a result, please make sure to source batteries from reliable vendors, and it is suggested that if the storage period is more than one month from the date of battery production, all the batteries should be activated.
If encountering the situation of battery passivation, users can activate the battery to eliminate the battery hysteresis.
ER14505 Battery Passivation:
7.1 To determine whether a battery requires activation
Connect a new ER14505 battery to a resistor in parallel, and check the voltage of the circuit. If the voltage is below 3.3V, it means the battery requires activation.
7.2 How to activate the battery
a. Connect a battery to a resistor in parallel
b. Keep the connection for 5~8 minutes
c. The voltage of the circuit should be ≧3.3, indicating successful activation.

Brand| Load Resistance| Activation Time| Activation Current
---|---|---|---
NUTONE| 165 Ω| 5 minutes| 20mA
RAMSAY| 67 Ω| 8 minutes| 50mA
EVE| 67 Ω| 8 minutes| 50mA
SAFT| 67 Ω| 8 minutes| 50mA

Note:
If you buy batteries from other than the above four manufacturers, then the battery activation time, activation current, and required load resistance shall be mainly subject to the announcement of each manufacturer.

Important Maintenance Instruction

Kindly pay attention to the following in order to achieve the best maintenance of the product:

• Keep the device dry. Rain, moisture, or any liquid might contain minerals and thus corrode electronic circuits. If the device gets wet, please dry it completely.
• Do not use or store the device in a dusty or dirty environment. It might damage its detachable parts and electronic components.
• Do not store the device under excessive heat conditions. High temperature can shorten the life of electronic devices, destroy batteries, and deform or melt some plastic parts.
• Do not store the device in places that are too cold. Otherwise, when the temperature rises to normal temperature, moisture will form inside, which will destroy the board.
• Do not throw, knock or shake the device. Rough handling of equipment can destroy internal circuit boards and delicate structures.
• Do not clean the device with strong chemicals, detergents, or strong detergents.
• Do not apply the device with paint. Smudges might block the device and affect the operation.
• Do not throw the battery into the fire, or the battery will explode. Damaged batteries may also explode. All of the above applies to your device, battery, and accessories. If any device is not working properly, please take it to the nearest authorized service facility for repair.

References

• Lora Command Resolver
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