netvox R718N17 Wireless Single Phase Current Meter User Manual

R718N1xxx(E) Series
Wireless Single-Phase Current Meter
Wireless Single-Phase
Current Meter
R718N1xxx(E) Series
User Manual

R718N17 Wireless Single Phase Current Meter

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

The R718N1xxx(E) series is the single-phase current meter device for Netvox Class A type devices based on the LoRaWAN open protocol and is compatible with the LoRaWAN protocol. R718N1xxx(E) series has different measuring range for different variety of CT. It is divided into:

LoRa Wireless Technology
LoRa is a wireless communication technology famous for its long-distance transmission and low power consumption. Compared with other communication methods, LoRa spread spectrum modulation technique greatly extend the communication distance.
It can be widely used in any use case that requires long-distance and low-data wireless communications. For example, automatic meter reading, building automation equipment, wireless security systems, industrial monitoring. It has features like small size, low power consumption, long transmission distance, strong 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

Features

• 2 x ER14505 lithium battery in parallel (3.6V/section)
• Only support AC current measuring.
• Main body: IP53; Current transformer: IP30
• LoRaWANTMClass A compatible
• Frequency Hopping Spread Spectrum (FHSS)
• Available third-party platform: Actility/ThingPark, TTN, MyDevices/Cayenne
• Low power consumption and long battery life

Note:
Please visit http://www.netvox.com.tw/electric/electric_calc.html for detailed information about battery life calculation.

1. The actual range may vary depending on the 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 the battery cover.)
---|---
Turn on| Press and hold the function key for 3 seconds until the green indicator flashes once.
Turn off (Reset to factory setting)| Press and hold the function key for 5 seconds until green indicator flashes 20 times.
Power off| Remove Batteries.
Note:
1. The device will be off in default after removing the battery and insert it again.
2. It is suggested to wait for 10 seconds between turning on and off the device.
3. 5 seconds after power on, the device will be in engineering test mode.

Network Joining

Never joined the network| Turn on the device and search for the network to join.
The green indicator light stays on for 5 seconds: Success The green indicator light remains off: Fail
---|---
Had joined the network (without factory resetting)| Turn on the device, and it will search for the previous network to join. The green indicator light stays on for 5 seconds: Success
The green indicator light remains off: Fail
Fail to Join the Network| 1st – 2nd minutes: Wake up every 15 seconds to send request for joining the network After 2nd minutes: The device is in sleeping mode and wakes up every 15 minutes to send request for joining the network

Function Key

Press the function key and hold for 5 seconds| The device will be set to default and turned off
The green indicator light flashes 20 times: Success The green indicator light remains off: Fail
---|---
Short press the function key (release it within 500ms)| The device is in the network: green indicator light flashes once and sends a report after sampling. ( Note: Date sampling takes 15 seconds .)
The device is not in the network: green indicator light remains off

Sleeping Mode

The device is turned on and in the network| Sleep period: Min Interval.
When the reportchange exceeds setting value or the state changes, the device would send a data report based on the Min Interval.
---|---
The device is turned on but not in the network| 1st – 2nd minutes: wake up every 15 seconds to send request for joining the network
After 2nd minutes: The device is in sleeping mode and wakes up every 15 minutes to send request for joining the network

Low Voltage Warning

Note:

1. To save the energy, please remove the batteries when the device is not in
2. Please check the device verification information on the gateway or consult your platform server

Data Report

The device will immediately send a version packet report along with two uplink packets including current value (mA).
The device sends data in the default configuration before any configuration is done.
Default setting:
Max Interval = 0x0708 (1800s) // MinTime cannot be less than 30 seconds. MaxTime must be greater than MinTime.
Min Interval = 0x0708 (1800s)
ReportChange= 0x0064 (100 mA)
Note:

1. Min Interval < 30s → Data reported every 30 seconds
2. Max Interval < Min Interval → Data reported at Min Interval
3. Frequent changes of current may cause inaccurate results when the device is sampling (15 seconds before the beginning of the Min Interval).

Measurement Range and Accuracy:

Note:

1. R718N1(E) and R718N17(E): report data as 0A when the current < 0.1A.
2. R718N115(E), R718N125(E), R718N163(E), and R718N1100(E): report data as 0A when the current < 1A .

Please refer Netvox LoRaWAN Application Command document and Netvox Lora Command Resolver http://www.netvox.com.cn:8888/cmddoc 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
30 to 65535| Any number between
Min Interval to 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
ReportType – 1 byte –the presentation of the NetvoxPayLoadData, according 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 0149000A02202208210000, the firmware version is 2022.08.21.

3. Data Packet:
   When Report Type=0x01 is data packet.

4. Current Value:
   The maximum payload of Current is 2 bytes, which means the maximum value that can be shown is 65535mA. To get the actual current value, the current needs to time Multiplier as it exceeds 65535mA.

Device| Device Type| Report Type| NetvoxPayLoadData
---|---|---|---
R718N1xxx(E) Series| 0x49| 0x00| SoftwareVersion (1 Byte) Eg.0x0A-V1.0| HardwareVersion (1 Byte)| DateCode (4 Bytes) eg 0x20170503| Reserved(2 Bytes)
0x01| Battery (1 Byte, unit:0.1v)| Current (2 Bytes, unit: mA)| Multiplier (1 Byte)| Thres hold Alarm
(1Byte) Bit0_Low Current Alarm Bit1_High Current Alarm Bit2-7:Reserved| Reserved
(3 Bytes)

1. Example 1 of Uplink: 014901240E 150100000000
   1th byte (01): Version
   2nd byte (49): DeviceType – R718N1xxx(E) Series
   3rd byte (01): ReportType
   4th byte (24): Battery – 3.6V 24 (Hex) = 36 (Dec), 36 0.Iv = 3.6v
   5th6 byte (OE15): Current – 3605 mA OEI5 (Hex) = 3605 (Dec), 3605 ImA = 3605mA
   7th byte (01): Multiplier — 1
   8th byte (00): Threshold Alarm — No alarm
   9th11th byte (000000): Reserved

2. Example 2 of Uplink: 014901A01B580A02000000
   1st byte (01): Version
   2nd byte (49): DeviceType – R718N1xxx(E) Series
   3rd byte (01): ReportType
   4th byte (AO): Battery -3.2V AO (Hex) = 1010 0000(Bin), bit7=1 means low voltage, 20(Hex)=32(Dec), 32* 0.1v = 3.2v8th byte (02): Threshold Alarm — HighCurrentAlarm, 02(Hex)=0000 00010(Bin), bitl=1 HighCurrentAlarm
   9th_11″ byte (000000): Reserved

5.2 Example of ConfigureCmd
FPort：0x07

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

Description| Device| Cmd ID| Device Type| NetvoxPayLoadData
---|---|---|---|---
Config ReportReq| R718N1xxx(E)
Series| 0x01| 0x49| MinTime (2bytes Unit:s)| MaxTime (2bytes Unit: s)| CurrentChange (2byte Unit:1mA)| Reserved (3Bytes,
Fixed 0x00)
Config ReportRsp| 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)| CurrentChange (2byte Unit:1mA)| Reserved (3Bytes,Fixed 0x00)

1. Configure device parameters
   MinTime = 60s (0x003C), MaxTime = 60s (0x003C), CurrentChange = 100mA (0x0064)
   Downlink: 0149003C003C0064000000
   The device returns:
   8149000000000000000000 (Configuration successful)
   8149010000000000000000 (Configuration failed)

2. Read device configuration parameter
   Downlink: 0249000000000000000000
   The device returns:
   8249003C003C0064000000 (Current device configuration parameters)

5.3 Example of Set/GetSensorAlarmThresholdCmd
Fport: 0x10

CmdDescriptor| CmdID
(1Byte)| Payload (10Bytes)
---|---|---
Set Sensor Alarm Thres hold Req| 0x01| Channel(1Byte) 0x00_Channel 1| SensorType(1Byte) 0x00Disable ALL
0x27 Current| SensorHighThreshold (4Bytes,Unit:1mA)| SensorLowThreshold (4Bytes,Unit:1mA)
Set Sensor Alarm
Thres hold Rsp| 0x81| Status
(0x00_success)| Reserved
(9Bytes,Fixed 0x00)
Get Sensor Alarm Thres hold Req| 0x02| Channel(1Byte, 0x00_Channel1)| SensorType(1Byte)0x00Disable ALL 0x27 Current| Reserved (8Bytes,Fixed 0x00)
Get Sensor Alarm Thres hold Rsp| 0x82| Channel (1Byte) 0x00_Channel 1| SensorType(1Byte)
0x00Disable ALL 0x27 Current| SensorHighThreshold (4Bytes,Unit:1mA)| SensorLowThreshold (4Bytes,Unit:1mA)
Note:
a.Set Sensor High/Low Threshold as 0xFFFFFFFF to disable threshold.
b.The last configuration would be kept as user reset the device back to the factory setting.
c. Firmware after 2023.07.24 supports threshold alarm.

1. Configure device parameter
   Channel = 0x00 (fixed value), SensorType = 0x27 (fixed value), SensorHighThreshold = 1000mA (0x000003E8),
   SensorLowThreshold=100mA (0x00000064)
   Downlink: 010027000003E800000064
   The device returns:
   8100000000000000000000 (Configuration successful)
   8101000000000000000000 (Configuration failed)

2. Read device configuration parameters.
   Downlink: 0200270000000000000000
   The device returns:
   820027000003E800000064 (Current device configuration parameters)

5.4 Example of NetvoxLoRaWANRejoin
Check if the device is still in the network. If the device is disconnected, it will automatically rejoin back to the network.
Fport: 0x20

CmdDescriptor| CmdID
(1 byte)| Payload (5 bytes)
---|---|---
SetNetvoxLoRaWANRejoinReq| 0x01| RejoinCheckPeriod(4 Bytes, Unit: 1s)| RejoinThreshold(1 Byte)
SetNetvoxLoRaWANRejoinRsp| 0x81| Status (1 Byte, 0x00_success)| Reserved (4 Bytes, Fixed 0x00)
GetNetvoxLoRaWANRejoinReq| 0x02| Reserved (5 Bytes, Fixed 0x00)
GetNetvoxLoRaWANRejoinRsp| 0x82| RejoinCheckPeriod (4 Bytes, Unit: 1s)| RejoinThreshold (1Byte)
Note:
a. Set RejoinCheckThreshold as 0xFFFFFFFF to stop the device from rejoining the network.
b.The last configuration would be kept as user reset the device back to the factory setting.
c. Default setting: RejoinCheckPeriod = 2 (hr) and RejoinThreshold = 3 (times)
d.Firmware after 2023.11.06 supports SetNetvoxLoRaWANRejoinReq.

1. Command Configuration
   Set RejoinCheckPeriod = 3600s (0x00000E10), RejoinThreshold = 3 times
   Downlink: 0100000E1003
   Response:
   810000000000 (Configuration success)
   810100000000 (Configuration failure)

2. Read current configuration
   RejoinCheckPeriod, RejoinThreshold
   Downlink: 020000000000
   Rthe esponse: 8200000E1003

5.5 Example for MinTime/MaxTime logic
Example#1 based on MinTime = 1 Hour, MaxTime= 1 Hour, Reportable Change i.e. BatteryVoltageChange=0.1V![netvox R718N17 Wireless Single Phase Current Meter

• sleeping](https://manuals.plus/wp-content/uploads/2024/05/netvox-R718N17 -Wireless-Single-Phase-Current-Meter-sleeping.jpg)

Note: MaxTime = MinTime. Data will only be reported according to MaxTime (MinTime) 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 MinTime = 15 Minutes, MaxTime= 1 Hour, Reportable Change i.e. Battery Voltage Change= 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 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.

Installation

1. The single-phase current meter R718N1xxx(E) series has a built-in magnet (see Figure 1 below). It can be attached to the surface of an object with iron during installation, which is convenient and quick.
   To make the installation more secure, please use screws (purchased separately) to fix the device to the wall or other objects (such as the installation diagram).
   Note: Do not install the device in a metal-shielded box or in an environment surrounded by other electrical equipment to avoid affecting the wireless transmission of the device.

2. Open the clamp-on current transformer, and then pass the live wire through the current transformer according to the installation.
   Note: “L←K” is marked on the bottom of the CT.

3. Precautions:
   3.1 Before using, users must check whether the appearance is deformed; otherwise, the test accuracy will be affected.
   3.2 The using environment should be kept away from strong magnetic fields, so as not to affect the test accuracy. It is strictly forbidden to use in humid and corrosive gas environments.
   3.3 Before installation, please confirm the current value of the load. If the current value of the load is higher than the measurement range, select a model with a higher measurement range.

4. The single-phase current meter samples the current according to MinTime. If the current value sampled this time relatively exceeds the set value (the default is 100mA) more than the current value reported last time, the device will immediately report the current value sampled this time. If the current variation does not exceed the default value, the data will be reported regularly according to MaxTime.

5. Press the function key of the device to start sampling data and report the data after 15 seconds.
   Note: MinTime cannot be less than 30 seconds.
   MaxTime must be set greater than Min Time.

The single-phase current detector R718N1xxx(E) is suitable
for the following scenarios:

• School
• Factory
• Shopping mall
• Office building
• Smart building

Where the electrical data of the device with the singlephase electricity needs to be detected.

1. The back of R718N1xxx(E) can be attached to iron surface or users can fix the two ends of device on the wall with screws.
2. When installing the R718N1xxx(E) series current transformer, please separate the live and neutral wires of the wire to be detected, and only take the live wire through current transformer and start the measurement according to the wiring below:

If the live wire and the neutral wire are connected together at the same time, they will offset each other and the measurement is 0.

Note:

1. Please do not disassemble the device unless it is required to replace the batteries.
2. Do not touch the waterproof gasket, LED indicator, and 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
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 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:

• Do not put the device near or submerge into water. Minerals in rain, moisture, and other liquids could cause corrosion of electronic components. Please dry the device, if it gets wet.
• Do not use or store the device in dusty or dirty environments to prevent damage to parts and electronic components.
• Do not store the device in high temperatures. This may shorten the lifespan of electronic components, damage batteries, and deform plastic parts.
• Do not store the device in cold temperatures. Moisture may damage circuit boards as the temperatures rise.
• Do not throw or cause other unnecessary shocks to the device. This may damage internal circuits and delicate components.
• Do not clean the device with strong chemicals, detergents, or strong detergents.
• Do not apply the device with paint. This may block detachable parts and cause malfunction.
• Do not dispose of batteries in fire to prevent explosion.

The instructions are applied to your device, battery, and accessories.
If any device is not working properly, please bring it to the nearest authorized service provider for repair.

References

• Netvox LoRaWAN Application Command
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