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Water and waste utilities need to monitor sewer levels and flows. If there are equipment breakdowns within the sewer system overflows may occur. There are large fines and other penalties levied on water and waste utilities when there is a sewer overflow and the cost of cleanups is substantial.
Sewer overflow conditions can be detected with simple level limit switches which may be installed within the sewer pipe at different levels, to trip a level limit alarm. Sewer flows can also be measured with the Unidata Starflow ultrasonic Doppler flow meter installed on the bottom of the sewer pipe.
The overflow monitoring application is relatively simple. There could be a set of mechanical limit switches installed inside the sewer pipe, perhaps 3 switches at low medium and high positions within the pipe, usually mounted on an angle bracket which is then inserted into the sewer pipe.
Each limit switch is wired back to the Neon Metering Module which is set up to detect when the limit level is exceeded. The Neon Metering Module alarm is activated and this alarm condition is sent to the Neon server via cellphone, satellite networks or local WI FI networks. The Neon Server processes the alarm and sends emails and / or text messages to alert operators of that out of limit and potential overflow condition.
Water and Waste utilities often need more sophisticated alarm handling, with multiple levels of escalation, such that if the first alarm was not acknowledged and attended to by the first person, within a pre-determined time, further alarms are be sent to different escalation contacts, to make sure the potential overflow condition was being attended to.
The cellphone based Neon Metering Modules are powered by a single lithium battery, and can operate for more than two years on that one lithium battery, so they are simple to install without the need for any power infrastructure. The Satellite and WI FI models require a small sealed gel battery and a very small solar panel.Some typical limit switches are shown, along with the simple wiring, and the battery arrangement.
A Neon Metering Module (NMM) can be wired up to a Unidata Starflow ultrasonic Doppler flow meter to measure the velocity and the depth, and then calculate the flow reading based on the size and the shape of the pipe, which can be rectangular, circular or ovoid.
There may be a need to record routine levels and flows over a period, say over 24 hours, and then and then upload that routine data once per day at a predetermined time, e.g. at midnight.
You should decide on an appropriate sensor reading interval, typically this would be to read the sensors every minute, and store the sensor data in memory every 5 minutes and send the sensor data to the Neon Server every few hours.
To conserve battery life, equipment is set to sleep between sensor readings, however limit switch changes are detected immediately even when the equipment is asleep. These limit switch changes trigger an immediate alarm transmission to the Neon Server and a text message can be sent to the relevant personnel to alert them of this alarm condition.
Another consideration is how to power the Neon Metering Module. A power budget should be performed by Unidata engineers to decide the best power method, either solar panels and sealed lead acid batteries or lithium batteries
In regard to mounting, the starflow instrument should be mounted inside the pipe using a pipe band or a mounting bracket. Care should be taken to make sure the installation is mechanically smooth, so any debris in the sewer flow is not caught on any sharp edges of the instrument, the mounting plate or the cable.
|Options for Neon Telemetry - NRT / RTU / Field Units||Unidata Part Number||Description|
|Cellular RTU 3G||2013F-AB03||Neon Metering Module 3G with Antenna and Li Battery|
|Cellular RTU 4G||2013F-AB04||Neon Metering Module 4G with Antenna and Li Battery|
|Cellular RTU 3G - Industrial||2016F-AB03||Neon Remote Terminal 3G with Antenna and Li Battery|
|Cellular RTU 4G - Industrial||2016F-AB04||Neon Remote Terminal 4G with Antenna and Li Battery|
|Low Earth Orbit Satellite Globalstar||2015E-AB0||Neon Remote Terminal - Satellite Globalstar Modem with Antenna and three Li Batteries|
|Ethernet||2017E-0B0-1 or 3||NRT Ethernet with single or triple Ethernet Ports|
with three Li Batteries
|Equatorial Orbit Satellite - Inmarsat||2018E-AB0-1 or 3||NRT Ethernet with single or triple Ethernet Ports|
with three Li Batteries
|LCD Display||2500E||NRT LCD Display|
|NRT Field Termination Strip||2103F||2015E,2016F,2017E, and 2018E NRT FTS|
|NRT Firmware Option||2303A-8M||8M Extended Memory Option|
|NRT Firmware Option||2303A-8M-CAM||8M Extended Memory & Serial Camera Option|
|NRT Firmware Option||2303A-CAM||Serial Camera Option|
|Options for Neon Application Software - Customer Server||Unidata Part Number||Description|
|Neon Application Software||2302A||Neon Server Software Licence Incl 5 NAL |
|Neon Application Software||2302A-10||Additional 10 NRT Access Licences|
|Neon Application Software||2302A-20||Additional 20 NRT Access Licences|
|Neon Application Software||2302A-50||Additional 50 NRT Access Licences|
|Options for Neon Application Software - Unidata Server||Unidata Part Number||Description|
|Neon Application Software||2301A||Neon Data Initial Subscription Setup Fee|
|Neon Hosting Service||2301A-01||Neon Data Service Fee for 1-50 NRTs|
|Neon Hosting Service||2301A-02||Neon Data Service Fee for 51-100 NRTs|
|Neon Hosting Service||2301A-10||Neon Data Service Fee Metering|
|Options for Conventional Dataloggers / Field Units||Unidata Part Number||Description|
|Standards Starlogger||6004D-11||Red Logger 512K with Alkaline Battery|
|Display Starlogger||6004D-21||Blue Logger 512K with LCD and Alkaline Battery|
|Prologger||7001D-11||Green Logger 1M with LCD and Alkaline Battery|
|Starlogger Field Termination Strip||6103E||6004D FTS|
|Prologger Field Termination Strip||7100E||7001D FTS|
|Starlog V4 Management Software||6308A-AUE||Starlog V4 Full Licence Key|