netvox R718B2 Wireless 2-Gang Resistance Temperature Detector User Manual
- June 6, 2024
- netvox
Table of Contents
netvox R718B2 Wireless 2-Gang Resistance Temperature Detector
Introduction
R718B2 is a Wireless 2-Gang Resistance Temperature Detector for Netvox ClassA
type devices based on the LoRaWAN open protocol and is compatible with the
LoRaWAN protocol.
R718B2 connects two external resistance temperature detectors (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
Main Features
- Adopt SX1276 LoRa wireless communication module
- 2 ER14505 battery AA SIZE (3.6V / section) parallel power supply
- PT1000 Platinum resistance temperature sensor detection
- The base is attached with a magnet that can be attached to a ferromagnetic material object
- Host body protection class IP65 / IP67 (optional)
- 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
*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 battery life of various models in different
configurations.
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:
| 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 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.
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. 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 to check the device verification information on the gateway or consult your
platform server 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: 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 reportchange exceeds setting value or the state changes: send a data report according to Min Interval.
Data Report
The device will immediately send a version packet report along with an uplink
packet including temperature1, temperature2 and battery voltage.
The device sends data in the default configuration before any configuration is
done.
Default setting:
MaxTime : Max Interval = 15 min = 900s
MinTime : Min Interval = 15 min = 900s
BatteryChange: 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
Report configuration example:
-
Configure device parameters MinTime = 1min, MaxTime = 1min, BatteryChange = 0.1v, Temperaturechange = 10℃1.
Downlink: 0114003C003C0100640000
Device returns :
8114000000000000000000 (configuration successful) 8114010000000000000000 (configuration failed) -
Read device parameters
Downlink : 0214000000000000000000
Device returns: 8214003C003C0100640000 (current device configuration parameters)
Example for MinTime/MaxTime logic:
Notes :
- The device only wakes up and performs data sampling according to MinTime 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 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.
- We do not recommend to set 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.
- 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 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.
-
1. The Wireless 2-Gang Resistance Temperature Detector
(R718B2) 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 it to avoid affecting the wireless transmission of the device. -
When R718B2 is compared with the last reported values, the temperature change is exceeded 0.1°C
(default),it will report values at the MinTime interval; If does not exceeded 0.1°C (default) ,it will report values at the MaxTime interval;
R718B2 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.