netvox R718CT Wireless Thermocouple Sensor User Manual
- June 5, 2024
- netvox
Table of Contents
netvox R718CT Wireless Thermocouple Sensor
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 written
permission of NETVOX Technology. The specifications are subject to change
without prior notice.
Introduction
- R718CK: The detecting range of R718CK is -40 °C~ +375°C.
- R718CK has the characteristics of good linearity, bigger thermal electromotive force, high sensitivity and stability. R718CT: The detecting range of
- R718CT is -40 °C~ +125°C.
- R718CT is more stable when detecting the temperature range of -40°C~0°C.
- R718CN: The detecting range of R718CN is -40 °C~ +800°C.
R718CN (nickel nickel-chromiumchromium-siliconsilicon-nickelnickel-
siliconsilicon-magnesium thermocouple): Its operating temperature is -40~+800
800°C. The N-type thermocouple has good linearity, large thermoelectromotive
force, high sensitivity, a and good stability and uniformity. It
has strong oxidation resistance and is not affected by short short-range
ordering.
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
- Apply SX1276 wireless communication module
- 2 section of ER14505 battery in parallel (AA size3.6V / section)
- R718CT IP rating: Main Body IP65/IP67, Thermocouple Sensor T-type IP67
- R718CK, R718CN IP rating: Whole Device IP50
- The base is attached with a magnet that can be attached to a ferromagnetic material object
- Thermocouple detection
- 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
- Improved power management for longer battery life
Battery Life:
Please refer to web: http://www.netvox.com.tw/electric/electric_calc.html
At this website, users can find battery lifetime for variety models at different configurations.
1. Actual range may vary depending on environment.
2. 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
| 1. Remove and insert the battery; the device is at off state by default.
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 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
Fail to join the network
| ****
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 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 temperature 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://loraresolver.netvoxcloud.com: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 | DeviceType | NetvoxPayLoadData |
CmdID– 1 byte
DeviceType– 1 byte –
Device Type of Device
NetvoxPayLoadData– var bytes (Max=9bytes)
ConfigReport Req
|
R718CK R718CT R718CN
|
0x01
|
0x91
0x92
0x93
| MinTime (2bytes
Unit:s)
| MaxTime (2bytes
Unit:s)
| BatteryChange (1byte
Unit:0.1v)
| Temperature Change
(2byte Unit:0.1°C)
| Reserved (2Bytes,Fixed
0x00)
---|---|---|---|---|---|---|---|---
ConfigReport Rsp
|
0x81
| Status (0x00_succ
ess)
|
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 R718CK report parametersparameters:MinTime = 1min 、MaxTime = 1min 、BatteryChange = 0.1v 、Temperatu reChange = 1°C (10*0.1 0.1°C)
DownlDownlink ： 0191 003C003C01003C003C01000 A0000 3C (Hex) 60(Dec) 0A(Hex) = 1 0(Dec)
ResponseResponse： 81 91 000000000000000000 (ConfiConfiguration success success) 81 91 010000000000000000 (Configuration failure failure) -
Read Configurati on:
DownlDownlink ： 02 91 00 000000000 0000000
ResponseResponse： 82 91 003C003C01003C003C01000 A0000 (Current configurationconfiguration)
Example of Temperature CalibrCalibration
Port:0x0E
| Description | CmdID | SensorType | PayLoad (Fix =9 Bytes) |
|---|
SetGlobal CalibrateReq
|
0x01
|
0x01
| Channel(1Byte) 0_Channel1,
1_Channel2,etc
| Multiplier (2bytes,
Unsigned)
| Divisor (2bytes,
Unsigned)
|
DeltValue (2bytes,Signed)
| Reserved (2Bytes,Fixed
0x00)
SetGlobal CalibrateRsp
|
0x81
| Channel(1Byte) 0_Channel1,
1_Channel2,etc
| Status (1Byte,0x00_
success)
|
Reserved (7Bytes,Fixed 0x00)
GetGlobal CalibrateReq
|
0x02
| Channel (1Byte,0_Channel1
,1_Channel2,etc)
|
Reserved (8Bytes,Fixed 0x00)
GetGlobal CalibrateRsp
|
0x82
| Channel(1Byte) 0_Channel1,
1_Channel2,etc
| Multiplier (2bytes,
Unsigned)
| Divisor (2bytes,
Unsigned)
|
DeltValue (2bytes,Signed)
| Reserved (2Bytes,Fixed
0x00)
ClearGlobal
CalibrateReq
|
0x03
| Reserved
(10Bytes,Fixed 0x00)
ClearGlobal
CalibrateRsp
|
0x83
| Status
(1Byte,0x00_success)
| Reserved
(9Bytes,Fixed 0x00)
SensorType : Temperature 0x01
-
Temperature ca libration:
If the temperature the R718 R718Cx detects is 16 ° and the actual temperature is 17 °, it means the calibration we want to make is +1 1°
SensorType =0 x01 , Channel 1= 0x00, Multiplier = 0x 0000001, Divisor 0x 000 1, 0x 00 0A
Downlink
Downlink：01010000010000101000001000100 0A 0000 // 0A Hex =10 10Dec , 10*0.1°C=
Response
Response：
810100
81010000 00000000000000 (Configuration success success)
810100
81010001 00000000000000 (Configuration failure failure) -
(4)
Check whether the temperature calib calibration
Downlink
Downlink：020100201000000000000000000
Response
Response：82 0100000100001000001000100 0A 00000000（Current configu rationration）
Example for MinTime/MaxTime 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 report according to MaxTiMaxTime (
duration regardless BatteryVoltageChange value.
Example#2
ba sed 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 :
- 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
-
The Wireless Thermocouple Sensor (R718CK/T/N) 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 R718CK/T/N is compared with the last reported values, the temperature change is exceeded 10°C (default),it will report values at the MinTime interval.
If does not exceeded 10°C (default) ,it will report values at the MaxTime interval.
R718CK/T/N 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
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:
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.
How to activate the battery
- Connect a battery to a resistor in parallel
- Keep the connection for 5~8 minutes
- The voltage of the circuit should be ≧3.3, indicating successful activation.
| Brand | Load Resistance | Activation Time | Activation Current |
|---|---|---|---|
| NHTONE | 165 Ω | 5 minutes | 20mA |
| RAMWAY | 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 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.