Synetica enLink Status-DP

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enLink Status-DP/AF

Differential Pressure / Airflow Sensor User Guide

LoRaWAN Wireless Differential Pressure / Airflow Sensor

• LoRaWAN long range wireless.

• Battery powered.

• High accuracy across a wide range of pressures.

• Status-DP supplied with Duct Fixing Kit to monitor differential pressure.

• Status-AF supplied with Multi-Point Air Velocity Probes measure average velocity pressure across air

ducts. Probe lengths of 100mm to 600mm available.

Status-DP measures differential pressure in the range of 25Pa to

5000Pa with industry leading accuracy of 0.1% of selected range.

Easily detect blocked filters in building ventilation systems to

reduce the risk of spreading disease. Differential Pressure data is

transmitted to the cloud using long range LoRa wireless where the

device data can be displayed and analysed to reveal operational

performance and generate alerts.

enLink Status-AF measures air velocity in the range of 0 to 40m/s

with industry leading accuracy of 0.1%. This sensor can be used to

ensure that recommended air flow rates for public buildings and

industrial plant are achieved. Air velocity data is transmitted using

long range LoRa wireless for integration with cloud services or on-

site systems via Modbus IP to reveal operational performance and

generate alerts.

The units are battery powered with long life of 3+ years

A built in USB port allows all parameters including pressure ranges,

sampling interval, wireless signal strength and wireless network

configuration to be viewed and set using simple menus via any

USB enabled host such as a PC or Mac.

Features

• Differential pressure and Airflow

monitoring*

• LoRa long range wireless

• Frequency Range 863-870MHz*

• Frequency Range 902-928MHz*

• Up to +16dBm Tx Power

• Built in USB port for power and

configuration

• Battery powered

• CE / FCC compliant

• RoHS compliant

• Made in the UK

Option / Model dependent

Dependent on settings and environment

Main Page

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Summary

Introduction and Activation

OTAA Configuration Parameters

Details DevEUI, AppEUI, and AppKey required for LoRaWAN network activation.

Powering and Initializing the Device

LED Indicators for Network Join

Explains how to power the unit and interpret LED signals during the network join process.

Configuring LoRaWAN Network Settings

USB Connection and Terminal Access

Guides users on connecting via USB and using terminal software for device configuration.

Setting AppEUI and AppKey via Quick Start

Describes configuring application identifiers and keys for network registration through the Quick Start menu.

Adjusting Operational Parameters

Setting the Transmit Interval

Details setting the data transmission frequency to optimize battery life and data reporting.

Pressure Sensor Calibration and Readings

Covers accessing live readings, transmission options, and applying pressure offsets for accuracy.

Sensor Application and Installation

Differential Pressure; Air Filter Monitoring

Details monitoring filter health by measuring differential pressure across it.

Airflow Monitoring and Probe Setup

Explains airflow measurement and correct installation of the airflow probe in ductwork.

Battery Management and Safety

Battery Installation, Replacement, and Disposal

Provides crucial guidance on installing, replacing, and safely handling lithium batteries.

Power, Data, and Support

Power Consumption Considerations

Discusses factors affecting battery life, such as temperature and transmission intervals.

LoRaWAN Payload Decoding Guide

Offers resources for decoding LoRaWAN data payloads for analysis.

Technical Support Resources

Directs users to resources for technical assistance and further information.

The enLink Status-DP/AF is a LoRaWAN wireless sensor designed for monitoring differential pressure and airflow. It operates on a long-range wireless network, making it suitable for various applications where remote monitoring is required. The device is battery-powered, offering a long operational life, which is beneficial for installations in hard-to-reach locations or where frequent battery changes are impractical.

Function Description

The enLink Status-DP/AF serves a dual purpose: it can function as either a differential pressure monitor or an airflow monitor, depending on the probes used.

As a differential pressure monitor (Status-DP), it measures differential pressure in a range of 25Pa to 5000Pa with high accuracy. This function is particularly useful for detecting blocked filters in building ventilation systems. By monitoring the pressure difference across a filter, the device can identify when a filter starts to clog, as its resistance to airflow increases, leading to a rise in differential pressure. This capability is crucial for maintaining air quality, reducing the risk of spreading disease, and ensuring the efficient operation of HVAC systems. Clogged filters can lead to an undersupply of ventilation, increased energy consumption, noisy fan operation, and can even become breeding grounds for mold and bacteria. The Status-DP is supplied with a Duct Fixing Kit for easy installation to monitor differential pressure.

As an airflow monitor (Status-AF), it measures air velocity in the range of 0 to 40m/s with high accuracy. This allows users to ensure that recommended airflow rates for public buildings and industrial plants are achieved. Maintaining proper airflow is vital for the efficient operation of HVAC systems. Lower airflow can lead to an underperforming system, while higher loads can result in reduced efficiency and increased running costs. The Status-AF is supplied with Multi-Point Air Velocity Probes, available in lengths from 100mm to 600mm, to measure average velocity pressure across air ducts.

Both differential pressure and air velocity data are transmitted wirelessly using LoRa technology to the cloud, where the data can be displayed, analyzed, and used to generate alerts, providing insights into operational performance.

Usage Features

The enLink Status-DP/AF is designed for ease of use and configuration.

Wireless Connectivity: It utilizes LoRaWAN for long-range wireless communication, enabling data transmission to cloud services or on-site systems via Modbus IP.
Battery Operation: The device is battery-powered, offering a long operational life of 3+ years, depending on settings and environmental conditions. This reduces the need for external power sources and simplifies installation.
USB Port for Configuration: A built-in USB port allows users to view and set all device parameters, including pressure ranges, sampling interval, wireless signal strength, and wireless network configuration. This is done through simple menus accessible via any USB-enabled host, such as a PC or Mac, using a terminal program like Tera Term.
Over-the-Air-Activation (OTAA): The device is configured using OTAA, a secure method for connecting to the LoRaWAN network. This involves a Join-procedure where a dynamic device address is assigned and security keys are negotiated.
Configurable LoRaWAN Keys: The unique DevEUI (End-device Identifier) is set at manufacture. The AppEUI (Application Identifier) and AppKey (Application key) can be pre-configured by Synetica or easily set by the user via the USB connection.
Adjustable Transmit Interval: Users can select a fixed transmit interval from various options. A longer interval (15 minutes or more) is recommended to extend battery life.
Pressure Sensor Parameter Offset: The pressure sensor parameters can be offset to compensate for factors such as pipe lengths, environmental conditions, and sensor drift. This ensures accurate measurements by allowing the user to zero the measurement when no airflow or differential pressure is present.
Live Readings Display: The configuration menu provides a live display of current device temperature, humidity, and pressure sensor values, which is useful for verifying readings before deployment.
LED Indicators: The device includes LED indicators for status. A blinking red LED indicates an attempt to join the network, while five green blinks signify a successful network join. The LEDs then switch off to conserve battery power.

Maintenance Features

Maintaining the enLink Status-DP/AF involves several key aspects to ensure its longevity and accurate operation.

Battery Installation and Replacement: The device uses 2 x AA sized Lithium 3.6V batteries (SAFT LS14500 or EVE ER14505 or direct equivalent). Careful attention must be paid to correct insertion, ensuring batteries are new, from the same manufacturer, and undamaged. The manual provides detailed warnings regarding the handling of lithium batteries due to their high energy capacity, emphasizing the risk of explosion or fire if mishandled. Only approved battery types should be used.
Safe Battery Disposal: Users are instructed to recycle batteries responsibly and not dispose of them in normal waste or fire.
Firmware Updates: While not explicitly detailed as a user-accessible feature, the presence of a firmware version in the device summary suggests that updates may be possible, potentially through the USB connection, to enhance functionality or address issues.
Sensor Calibration/Offset: The ability to offset pressure sensor parameters is a crucial maintenance feature. This allows users to recalibrate the sensor to zero, correcting for small errors that may arise from pipe lengths, environmental conditions, or sensor drift over time, thereby ensuring continued accuracy.
Installation Guidelines: For airflow monitoring, specific guidelines are provided for probe installation, including avoiding turbulent airflow, ensuring proper sealing, and correct orientation of the probe with the arrow pointing in the direction of airflow. These guidelines contribute to accurate and reliable measurements, reducing the need for troubleshooting later.
Technical Support: Synetica provides technical assistance through their website's downloads section and via email, offering resources like LoRaWAN payload decoders and guides, which are valuable for troubleshooting and understanding device data.