netvox R718B Wireless Resistance Temperature Detector User Manual
- June 6, 2024
- netvox
Table of Contents
netvox R718B Wireless Resistance Temperature Detector User Manual
Introduction
The R718B is a Wireless Resistance Temperature Detector for Netvox ClassA type devices based on the LoRaWAN open protocol and is compatible with the LoRaWAN protocol.
R718B connects an external resistance temperature detector (PT1000) to measures the temperature.
LoRa Wireless Technology:
LoRa is a wireless communication technology dedicated to long distance and low power consumption. Compared with other communication methods, LoRa spread spectrum modulation method greatly increases to expand the communication distance. Widely used in long-distance, low-data wireless communications. For example, automatic meter reading, building automation equipment, wireless security systems, 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
Round head probe
Needle probe
L-type probe
Main Features
- Adopt SX1276 LoRa wireless communication module
- PT1000 Platinum resistance temperature sensor detection
- R718B accuracy: ±0.5°C
- Temperature range: -40°C to 200°C
- 2 ER14505 battery AA SIZE (3.6V / section) parallel power supply
- Protection class IP65/IP67 (option)
- The base is attached with a magnet that can be attached to a ferromagnetic material object
- Compatible with LoRaWANTM Class A
- Frequency hopping spread spectrum
- Configuration parameters can be configured via a third-party software platform, data can be read and alerts 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
- Battery Life:
- Please refer to web: http://www.netvox.com.tw/electric/electric_calc.html
- At this website, users can find battery life time for variety models at different configurations.
- Actual range may vary depending on environment.
- Battery life is determined by sensor reporting frequency and other variables
Set up Instruction
On/Off
Power on| Insert batteries. (users may need a screwdriver to open)
Turn on| Press and hold the function key for 3 seconds till the green
indicator flashes once.
Turn off (Restore to factory setting)| Press and hold the function key for 5
seconds till green indicator flashes for 20 times.
Power off| Remove Batteries.
Note
|
- Remove and insert the battery; the device is at off state by default.
- On/off interval is suggested to be about 10 seconds to avoid the interference of capacitor inductance and other energy storage components.
- At 1st -5th 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 green indicator stays
on for 5 seconds: success
The green indicator remains off: fail
Had joined the network (not at factory setting)
| Turn on the device to search the previous network to join. The green
indicator stays on for 5 seconds: success
The green indicator remains off: fail
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: green indicator flashes once and sends a
report
The device is not in the network: green indicator remains off
Sleeping Mode
The device is on and in the network
| Sleeping period: Min Interval.
When the report change exceeds setting value or the state changes: send a data
report according to Min Interval.
Low Voltage Warning
| Low Voltage | 3.2V |
|---|
Suggest to remove batteries if the device is not used.
Data Report
The device will immediately send a version packet report along with an uplink packet including temperature and battery voltage
The device sends data in the default configuration before any configuration is done.
Default setting:
- Max Time : Max Interval = 15 min = 900s
- Min Time : Min Interval = 15 min = 900s
- Battery Change: 0x01 (0.1V)
- TemperatureChange:0x0064 (10°C)
Note:
The device report interval will be programmed based on the default firmware
which may vary.
The interval between two reports must be the minimum time.
Please refer Netvox LoRaWAN Application Command document and Netvox Lora
Command Resolver
http://www.netvox.com.cn:8888/page/index to resolve uplink data
Data report configuration and sending period are as following:
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
Example of Report configuration
FPort：0x07
| Bytes | 1 | 1 | Var(Fix =9 Bytes) |
|---|---|---|---|
| CmdID | Device Type | NetvoxPayLoadData |
CmdID– 1 byte
DeviceType – 1 byte – Device Type of Device
NetvoxPayLoadData – var bytes (Max=9bytes)
Description
|
Device
| Cmd ID| Device Type|
NetvoxPayLoadData
---|---|---|---|---
ConfigReportReq
|
R718B
|
0x01
|
0x95
| MinTime (2bytes Unit:s)| MaxTime (2bytes Unit:s)| BatteryChange (1byte Unit:0.1v)|
Temperature change
(2byte Unit:0.1°C)
|
Reserved (2Bytes,Fixed 0x00)
ConfigReportRsp
|
0x81
| Status
(0x00_success)| Reserved
(8Bytes,Fixed 0x00)
ReadConfig
ReportReq
| 0x02|
Reserved
(9Bytes,Fixed 0x00)
ReadConfig ReportRsp|
0x82
| MinTime (2bytes Unit:s)| MaxTime (2bytes Unit:s)| BatteryChange (1byte Unit:0.1v)|
Temperature Change
(2byte Unit:0.1°C )
| Reserved (2Bytes,Fixed 0x00)
-
Configure device parameters MinTime = 1min, MaxTime = 1min, BatteryChange = 0.1v, Temperaturechange = 10°C
Downlink: 0195003C003C0100640000
Devices return:
8195000000000000000000 (configuration is successful)
8195010000000000000000 (configuration is failed) -
Read device parameters
Downlink: 0295000000000000000000
Devices return:
8295003C003C0100640000 (current device configuration parameters)
Example for MinTime/MaxTime logic:
Example#1 based on MinTime = 1 Hour, Max Time= 1 Hour, Reportable Change i.e. Battery Voltage Change=0.1V
Note: Max Time=Min Time. Data will only be report according to Max Time (Min Time) duration regardless Battery Voltage Change value.
Example#2 based on Min Time = 15 Minutes, Max Time= 1 Hour, Reportable Change i.e. Battery Voltage Change= 0.1V.
Example#3 based on Min Time = 15 Minutes, Max Time= 1 Hour, Reportable Change i.e. Battery Voltage Change= 0.1V.
Notes :
- The device only wakes up and performs data sampling according to Min Time Interval. When it is sleeping, it does not collect data.
- The data collected is compared with the last data reported. If the data variation is greater than the Reportable Change value, the device reports according to Min Time interval. If the data variation is not greater than the last data reported, the device reports according to Max Time interval.
- We do not recommend to set the Min Time Interval value too low. If the Min Time Interval is too low, the device wakes up frequently and the battery will be drained soon.
- Whenever the device sends a report, no matter resulting from data variation, button pushed or Max Time interval, another cycle of Min Time/Max Time calculation is started.
Installation
This product comes with 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.
-
The Wireless Resistance Temperature Detector (R718B) has a built-in magnet (see 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 (see Figure 2 below).
Note: Do not install the device in a metal shielded box or in an environment with other electrical equipment around -
When R718B is compared with the last reported values, the temperature change is exceeded 0.1°C (default),it will report values at the Min Time interval; If does not exceeded 0.1°C (default) ,it will report values at the Max Time interval;
R718B is suitable below scenarios:
- Oven
- Industrial control equipment
- Semiconductor industry
Note
Please do not disassemble the device unless it is required to replace the
batteries.
Do not touch the waterproof gasket, LED indicator light, function keys when
replacing the batteries. Please use 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 of 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 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 the batteries should be produced within the last three months.
If encountering the situation of battery passivation, users can activate the battery to eliminate the battery hysteresis
To determine whether a battery requires activation
Connect a new ER14505 battery to a 68ohm resistor in parallel, and check the voltage of the circuit. If the voltage is below 3.3V, it means the battery requires activation.
How to activate the battery
- Connect a battery to a 68ohm resistor in parallel
- Keep the connection for 6~8 minutes
- The voltage of the circuit should be ≧3.3V
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 dusty or dirty environment. It might damage its detachable parts and electronic components.
- Do not store the device under excessive heat condition. 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 in 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.
