netvox R718CK Wireless Thermocouple Sensor User Manual

: September 25, 2024
: netvox

Table of Contents

R718CK Wireless Thermocouple Sensor
Specifications
Product Usage Instructions
1. Setup
2. Function Key
3. Data Report
- FAQ
1. How do I check the battery lifespan?
2. What is the default reporting interval for data?
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)

R718CK Wireless Thermocouple Sensor

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Specifications

Product Name: Wireless Thermocouple Sensor Type K/T/N/R
R718CK/CT/CN/CR
Wireless Communication: SX1276 module
Battery: 2 x ER14505 in parallel (AA size, 3.6V/section)
IP Rating:
- R718CT: Main body IP65/IP67; T-type thermocouple sensor
  IP67
- R718CK and R718CN: IP50 (whole device)
- R718CR: R-type thermocouple sensor IP60
Features:
- Magnet base for easy mounting
- Thermocouple detection
- Compatible with LoRaWANTM Class A
- Frequency hopping spread spectrum
- Applicable to third-party platforms like Actility/ThingPark,
  TTN, MyDevices/Cayenne
- Improved power management for longer battery life

Product Usage Instructions

1. Setup

Power On/Off:

Power On: Press and hold the function key for
3 seconds until the green indicator flashes once.
Power Off: Press and hold the function key for
5 seconds until the green indicator flashes 20 times.

Network Joining:

Never Joined the Network: Insert batteries and
turn on the device to search for the network.
Had Joined the Network: Turn on the device to
search for the previous network.
Fail to Join the Network: Check device
verification information on the gateway or consult platform server
provider.

2. Function Key

Sleeping Mode: Press and hold the function key
for 5 seconds.

Low Voltage Warning/Restore to Factory Setting:
The green indicator flashes 20 times for success or remains off for
fail.

3. Data Report

Data Reporting Period:

The device will immediately send a version packet report along
with temperature and battery voltage data. Refer to Netvox LoRaWAN
Application Command document for more details.

FAQ

1. How do I check the battery lifespan?

You can visit
http://www.netvox.com.tw/electric/electric_calc.html for
information on battery lifespan.

2. What is the default reporting interval for data?

The default reporting interval may vary based on firmware, but
it is recommended to configure it to the minimum time interval.

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Wireless Thermocouple Sensor – Type K/T/N/R

R718CK/CT/CN/CR

Wireless Thermocouple Sensor Type K/T/N/R
R718CK/CT/CN/CR 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 written permission of NETVOX Technology. The specifications are subject to change without prior notice.

Table of Contents
1. Introduction …………………………………………………………………………………………………………………….. 2 2. Appearance ……………………………………………………………………………………………………………………… 3 3. Features ………………………………………………………………………………………………………………………….. 4 4. Set up Instruction……………………………………………………………………………………………………………… 4 5. Data Report …………………………………………………………………………………………………………………….. 5
5.1 Example of ReportDataCmd ………………………………………………………………………………………… 6 5.2 Example of ConfigureCmd ………………………………………………………………………………………….. 7 5.3 Example of Temperature Calibration …………………………………………………………………………….. 8 5.4 Example of NetvoxLoRaWANRejoin ……………………………………………………………………………. 9 5.5 Example for MinTime/MaxTime logic ………………………………………………………………………… 10 6. Installation …………………………………………………………………………………………………………………….. 12 7. Information about Battery Passivation ………………………………………………………………………………. 13 8. Important Maintenance Instruction……………………………………………………………………………………. 14 9. Precautions for Outdoor Installation………………………………………………………………………………….. 14
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1. Introduction
R718CK (Ni-Cr / Ni-Si): The detecting range of R718CK is -40°C to +375°C. R718CK has the characteristics of good linearity, bigger thermal electromotive force, high sensitivity, and stability.
R718CT (Cu / Cu-Ni): The detecting range of R718CT is -40°C to +125°C. R718CT is more stable when detecting the temperature range of -40°C to 0°C.
R718CN (Ni-Cro-Sil / Ni-Si-Mg): The detecting range of R718CN is -40°C to +800°C. The N-type thermocouple has good linearity, large thermoelectromotive force, high sensitivity, and good stability and uniformity. It has strong oxidation resistance and is not affected by short-range ordering.
R718CR (noble metal thermocouple): The detecting range of R718CR is 0°C to +1400°C. The R-type thermocouple gets accurate results, operates stably, and has a long lifespan. With good chemical and physical performance, it can be used in oxidizing and inert gas.
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.
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2. Appearance

Indicator Function Key
Thermocouple Sensor
R718CT

R718CK

R718CN

R718CR

3

3. Features
SX1276 wireless communication module 2 x ER14505 battery in parallel (AA size3.6V / section) IP rating:
R718CT main body IP65/IP67; T-type thermocouple sensor IP67 R718CK and R718CN IP50 (whole device) R718CR R-type thermocouple sensor IP60 Magnet base Thermocouple detection Compatible with LoRaWANTM Class A Frequency hopping spread spectrum Applicable to third-party platforms: Actility/ThingPark, TTN, MyDevices/Cayenne Improved power management for longer battery life Note: Please visit http://www.netvox.com.tw/electric/electric_calc.html for more information about battery lifespan.

4. Set up Instruction
On/Off
Power on Turn on Turn off (Reset to factory setting) Power off
Note
Network Joining
Never joined the network
Had joined the network (not at factory setting)
Fail to join the network

Insert batteries. (Users may need a screwdriver to open) Press and hold the function key for 3 seconds until the green indicator flashes once.
Press and hold the function key for 5 seconds until the green indicator flashes 20 times.
Remove Batteries. 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.
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 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 Please check the device verification information on the gateway or consult your platform server provider.

4

Function Key
Press and hold for 5 seconds
Press once Sleeping Mode The device is on and in the network Low Voltage Warning Low Voltage

Restore to factory setting / Turn off The green indicator flashes 20 times: success The green indicator remains off: fail 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 period: Min Interval. When the reportchange exceeds setting value or the state changes: send a data report according to Min Interval.
3.2V

5. Data Report
Data report configuration and sending period are as follows:
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 Interval: 0x0384 (900s) Min Interval: 0x0384 (900s) BatteryChange: 0x01 (0.1V) TemperatureChange:0x0064 (10°C)
Note: (1) The device report interval will be programmed based on the default firmware which may vary. (2) The interval between two reports must be the minimum time. (3) Please refer Netvox LoRaWAN Application Command document and Netvox Lora Command Resolver http://cmddoc.netvoxcloud.com/cmddoc to resolve uplink data.

Min Interval (Unit: second) Any number between
165535

Max Interval (Unit: second) Any number between
165535

Reportable Change Cannot be 0

Current Change Reportable Change
Report per Min Interval

Current Change Reportable Change
Report per Max Interval

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5.1 Example of ReportDataCmd
FPort0x06

Bytes

1

Var(Fix=8 Bytes)

Version DeviceType ReportType

NetvoxPayLoadData

Version 1 byte 0x01—-the Version of NetvoxLoRaWAN Application Command Version

DeviceType 1 byte Device Type of Device

The devicetype is listed in Netvox LoRaWAN Application Devicetype doc

ReportType 1 byte the presentation of the NetvoxPayLoadDataaccording the devicetype

NetvoxPayLoadData Fixed bytes (Fixed =8bytes)

Tips 1. Battery Voltage: The voltage value is bit 0 ~ bit 6, bit 7=0 is normal voltage, and bit 7=1 is low voltage. Battery=0xA0, binary=1010 0000, if bit 7= 1, it means low voltage. The actual voltage is 0010 0000 = 0x20 = 32, 32*0.1v =3.2v 2. Version Packet: When Report Type=0x00 is the version packet, such as 0192000A02202108160000, the firmware version is 2021.08.16. 3. Data Packet: When Report Type=0x01 is data packet. 4. Signed Value: When the temperature is negative, 2’s complement should be calculated.

Device

Device Type

Report Type

NetvoxPayLoadData

R718CK R718CT R718CN / R718CR

0x91 0x92 0x93

0x01

Battery (1Byte, unit: 0.1V)

Temperature (Signed 2 Bytes, unit: 0.1°C)

Reserved (5 Bytes, fixed 0x00)

Example 1 of R718CT uplink: 0192019F01220000000000 1st byte (01): Version 2nd byte (92): DeviceType 0x92 R718CT 3rd byte (01): ReportType 4th byte (9F): Battery3.1v (Low voltage), 9F Hex = 31 Dec 310.1v=3.1v 5th 6th byte (0122): Temperature29.0°C , 0122 Hex = 290 Dec 2900.1°C =29.0°C 7th 11th byte (0000000000): Reserved

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5.2 Example of ConfigureCmd

FPort0x07

Bytes

1

Var (Fix =9 Bytes)

CmdID DeviceType

NetvoxPayLoadData

CmdID 1 byte

DeviceType 1 byte Device Type of Device

NetvoxPayLoadData var bytes (Max=9bytes)

Description

Device

Cmd Device ID Type

NetvoxPayloadData

ConfigReport Req

0x01

MinTime (2 bytes Unit: s)

MaxTime (2 bytes Unit: s)

BatteryChange (1 byte
Unit: 0.1v)

Temperature Change (2 bytes
Unit: 0.1°C)

Reserved (2 bytes, Fixed 0x00)

ConfigReport Rsp
ReadConfigR eportReq

R718CK R718CT R718CN / R718CR

0x81 0x02

0x91 0x92 0x93

Status

Reserved

(0x00_success)

(8 bytes, Fixed 0x00)

Reserved

(9 bytes, Fixed 0x00)

ReadConfigR eportRsp

0x82

MinTime (2 bytes Unit: s)

MaxTime (2 bytes Unit: s)

BatteryChange (1 byte
Unit: 0.1v)

Temperature Change (2 bytes
Unit: 0.1°C)

Reserved (2 bytes, Fixed 0x00)

(1) Configure R718CK report parameters: MinTime = 1min, MaxTime = 1min, BatteryChange = 0.1v, TemperatureChange = 0.1°C
Downlink: 0191003C003C0100010000 3C(Hex) =60(Dec) Response: 8191000000000000000000 (Configuration success)
8191010000000000000000 (Configuration failure) (2) Read Configuration:
Downlink: 0291000000000000000000 Response: 8291003C003C0100010000 (Current configuration)

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5.3 Example of Temperature Calibration
Port:0x0E

Description CmdID SensorType

SetGlobal CalibrateReq

0x01

Channel (1 byte) 0_Channel1,
1_Channel2, etc

SetGlobal CalibrateRsp

0x81

0x01

GetGlobal CalibrateReq

0x02

Channel (1 byte) 0_Channel1,
1_Channel2, etc Channel (1 byte)
0_Channel1, 1_Channel2, etc

GetGlobal CalibrateRsp

0x82

Channel (1 byte) 0_Channel1,
1_Channel2, etc

ClearGlobal CalibrateReq

0x03

ClearGlobal CalibrateRsp

0x83

Status (1 byte,0x00_success)

SensorType: Temperature 0x01

PayLoad (Fix =9 Bytes)

Multiplier (2 bytes, Unsigned)
Status (1 byte, 0x00_success)

Divisor (2 bytes, Unsigned)

DeltValue (2 bytes, Signed)

Reserved (2 bytes, Fixed 0x00)

Reserved (7 bytes, Fixed 0x00)

Reserved (8 bytes, Fixed 0x00)

Multiplier

Divisor

DeltValue

(2 bytes,

Unsigned)

Signed)

Reserved

(10 bytes, Fixed 0x00)

Reserved

(9 bytes, Fixed 0x00)

Reserved (2 bytes, Fixed 0x00)

(1) Temperature calibration: If the temperature the R718Cx detects is 16°C and the actual temperature is 17°C, the calibration needs to increase by 1°C. SensorType =0x01, Channel 1= 0x00, Multiplier = 0x0001, Divisor =0x0001, DeltValue= 0x0064
Downlink: 0101000001000100640000 Response:
8101000000000000000000 (Configuration success) 8101000100000000000000 (Configuration failure)

(2) Check whether the temperature calibration Downlink: 0201000000000000000000 Response: 8201000001000100640000 (Current configuration)

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5.4 Example of NetvoxLoRaWANRejoin

Fport:0x20

CmdDescriptor

CmdID (1 byte)

Payload (5 bytes)

RejoinCheckPeriod

SetNetvoxLoRaWANRejoinReq

0x01

(4 bytes, Unit: 1s 0XFFFFFFFF Disable

SetNetvoxLoRaWANRejoinReq

NetvoxLoRaWANRejoinFunction)

SetNetvoxLoRaWANRejoinRsp

0x81

Status (1 byte, 0x00_success)

SetNetvoxLoRaWANRejoinRsp

GetNetvoxLoRaWANRejoinReq

0x02

Reserved (5 bytes, Fixed 0x00)

GetNetvoxLoRaWANRejoinRsp

0x82

RejoinCheckPeriod (4 bytes, Unit: 1s) GetNetvoxLoRaWANRejoinRsp

(1) Configure parameters

RejoinCheckPeriod = 60min (0x00000E10); RejoinThreshold = 3 times (0x03)

Downlink: 0100000E1003

Response: 810000000000 (configuration succeed)

810100000000 (configuration fail)

(2) Read configuration Downlink: 020000000000 Response: 8200000E1003
Note: a. Set RejoinCheckThreshold as 0xFFFFFFFF to stop the device from rejoining the network. b. The last configuration would be kept as user factory resets the device. c. Default setting: RejoinCheckPeriod = 2 (hr) and RejoinThreshold = 3 (times)

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

MaxTime

sleeping (MinTime)

Wakes up and collect data REPORTS 3.6V

Wake up and collect data REPORTS 3.6V

Note: MaxTime=MinTime. Data will only be report 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. MaxTime

sleeping (MinTime) sleeping

sleeping

0H

15thM

30thM

45thM

1H

2H

Wakes up and collects data REPORT 3.6V

Wakes up and collects data 3.6V
Does not report

Wakes up and collects data REPORTS 3.6V

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

sleeping

Wakes up and collects data 3.5V |3.5-3.6|=0.1 REPORTS 3.5V
sleeping

Users push the button, REPORTS 3.5V.
Recalculate MaxTime.

MaxTime
Wakes up and collects data 3.5V Does not report

0H

15thM

Wakes up and collects data REPORTS 3.6V

Wakes up and collects data
3.6V Does not report

30thM

45thM

1H 1H 10thM 1H 25thM

Wakes up and collects data
3.5V Does not report

1H 40thM

1H 55thM

2H 10thM

Wakes up and Wakes up and

collects data collects data

3.5V

REPORTS 3.5V

Does not report

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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 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. 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.
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6. Installation

1. The Wireless Thermocouple Sensor (R718CK/T/N/R) 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.

2. When R718CK/T/N/R 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/R is suitable below scenarios: Oven Industrial control equipment Semiconductor industry

Temperature probe
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.
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7. 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:
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

NHTONE

165

5 minutes

20mA

RAMWAY

67

8 minutes

50mA

Note:

EVE SAFT

67 67

8 minutes 8 minutes

50mA 50mA

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.

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8. Important Maintenance Instruction
Kindly pay attention to the following 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 extremely hot conditions. High temperatures 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, moisture that forms inside the
device will damage 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 operating properly, please take it to the nearest authorized service facility for repair.
9. Precautions for Outdoor Installation
According to the Enclosure Protection Class (IP code), the device is compliant to GB 4208-2008 standard, which is equivalent to IEC 60529:2001 degrees of protection provided by enclosures (IP Code).
IP Standard Test Method: IP65: spray the device in all directions under 12.5L/min water flow for 3min, and the internal electronic function is normal. IP65 is dustproof and able to prevent damage caused by water from nozzles in all directions from invading electrical appliances. It can be used in general indoor and sheltered outdoor environments. Installation in extreme weather conditions or direct exposure to sunlight and rain could damage the components of the device. Users may need to install the device under an awning (fig. 1) or face the side with an LED and function key downwards (fig. 2) to prevent malfunction.
IP67: the device is immersed in 1m deep water for 30 minutes, and the internal electronic function is normal.

Fig 1. Install under an awning

Fig 2. Install with LED and function key faced downwards
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