Water Meter

Smart Water Metering Solutions from Texas Instruments

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Design Considerations

Two-Way Communication and Time Synchronized Water Measurement

TI provides the Low Power RF portfolio (both sub-1 GHz and 2.4 GHz solutions) that interface with a TI MCU. This type of communication enables early leak detection in the water meter solutions as well as monitoring and customer awareness for this and other end equipments related to Smart Grid technology.

Water Meter - Logging and Billing

With the implementation of flexible tariff rates it is critical to have a system where consumption information is logged. TI MCU solutions provide embedded flash technology to make this type of system a reality. In addition, TI provides solutions for anti-tamper and pre-payment RFID options for the ultimate in flexibility in today's smart water meters.

Infrastructure life-time extension

In order to optimize service frequency, battery life times in this type of application need to last 10-15 years. TI's MSP430 Ultra Low Power MCU's fit seamlessly into this thought process by combining high-performance with low power.

Water Meter - Power

As part of maximizing battery life, the correct selection of an ultra-low quiescent current power management device is a key to optimizing the low power of the MSP430. While running the MCU directly from the battery may work (within the specified MCU operating range) and seem to save the cost of power management components, the lack of voltage regulation means much higher MCU stand-by power consumption and lower battery life.

This can lead to higher maintenance costs that will far offset any cost savings observed by eliminating the regulator. Regulating the MCU and peripheral communication ICs at the lowest possible voltage will optimize power savings and lengthen battery life.

Depending on the type of battery used and the operating mode (full load) duty cycle of the meter, there are multiple choices in power management solutions. For simple, low duty cycle (long stand-by) applications, using batteries with a fairly flat discharge curve (such as primary cell Li-SOCl2) the use of ultra-low Iq LDOs can provide long battery life at very low cost. For higher operating duty cycle applications, the use of a low Iq DC/DC regulator with power savings mode (for light loads) provides higher efficiency with a modest increase in cost.

For applications using batteries with a linear discharge curve, such as multi-cell alkaline or NiXX, the use of a low-Iq buck/boost converter will maximize battery life by providing regulation down to discharge voltages as low as 1.8-volts. For use of single-cell or small coin cell batteries, where the battery voltage can be less than the regulated voltage, the use of low-Iq boost converters can provide regulation with input voltages as low as 0.7-volts.

Although full operation of the MCU and peripheral communication ICs can be optimized at one voltage, in stand-by mode, these devices can operate at much lower voltages (simply maintaining RTC and memory). The use of DC/DC converters and LDOs with dynamic voltage scaling (usually implemented with a V-Select logic pin) can further increase battery life.

Water Meter - Analog Sensing

The mechanical forces in meters can be measured/detected by various types of sensors. Because voltages are very low, precise low-noise amplifiers (for flow and temperature), and instrumentation amps (for pressure) such as the OPA2209 and INA10x, respectively, are needed at the front end. Usually the voltage is digitized with precision ADCs such as the ADS125x.

The ADS125x are precision, wide dynamic range, delta-sigma, Analog-to-Digital (A/D) converters with 18 to 24-bit resolution operating from a single +5V supply and guarantee no missing codes. TI products related to water meter end equipment solutions are ideal for high-resolution measurement applications like cardiac diagnostics, smart transmitters, industrial process control, weigh scales.

By supporting such features TI enables you to prepare accurate bills, perform regular balances and reconciliation, and provide real-time usage information for optimal energy and water conservation efforts.

Application Notes (15)

Title Abstract Type Size (KB) Date Views
HTM 8 KB 07 Sep 2012 1284
HTM 8 KB 08 Feb 2012 1572
HTM 8 KB 29 Apr 2011 420
HTM 8 KB 11 Jan 2010 982
HTM 8 KB 16 Dec 2009 1475
HTM 8 KB 18 Sep 2009 842
HTM 9 KB 18 Aug 2009 136
HTM 8 KB 17 Mar 2009 1183
HTM 8 KB 06 Nov 2008 717
HTM 8 KB 31 Mar 2008 686
HTM 8 KB 02 Jan 2008 280
HTM 9 KB 18 Apr 2007 159
HTM 8 KB 15 Dec 2006 228
HTM 8 KB 01 Aug 2006 116
HTM 8 KB 28 Feb 2006 96

User Guides (1)

Title Abstract Type Size (KB) Date Views
pdf 510 KB 21 Aug 2012 273
    

Reference Designs

Selection and Solution Guides

Selection Guides (4)

Title Abstract Type Size (KB) Date Views
PDF 2.76 MB 06 Oct 2014 22343
PDF 234 KB 16 Jan 2013 2086
PDF 302 KB 28 Mar 2012 1487
PDF 175 KB 11 Jun 2010 1222

Solution Guides (2)

Title Abstract Type Size (KB) Date Views
PDF 4.31 MB 15 Jan 2014 9859
PDF 409 KB 10 Jan 2011 3230

Tools and Software

Name Part # Company Software/Tool Type
CC1101 Evaluation Module 433MHz CC1101EMK433 Texas Instruments Daughter Cards
CC1101 Evaluation Module 868-915MHz CC1101EMK868-915 Texas Instruments Daughter Cards
CC1101-CC1190 869 MHz Evaluation Module Kit CC1101CC1190EMK868 Texas Instruments Daughter Cards
CC1120 Evaluation Module Kit 169MHz CC1120EMK-169 Texas Instruments Daughter Cards
CC1120 Evaluation Module Kit 420-470MHz CC1120EMK-420-470 Texas Instruments Daughter Cards
CC1120 Evaluation Module Kit 868-915MHz CC1120EMK-868-915 Texas Instruments Daughter Cards
CC1120 Evaluation Module Kit 955MHz CC1120EMK-955 Texas Instruments Daughter Cards
MSP430 868/915MHZ Wireless Target Board MSP430-3P-AWGH-AMB8423-DEVBD Amber Wireless GmbH Development Kits
SimpliciTI Compliant Protocol Stack SIMPLICITI Texas Instruments Software Libraries
SmartRF Studio SMARTRFTM-STUDIO Texas Instruments Calculation Tools

Product Bulletin & White Papers

Product Bulletin (2)

Title Abstract Type Size (MB) Date Views
PDF 167 KB 05 Nov 2014 1625
PDF 190 KB 09 Nov 2012 505

White Papers (6)

Title Abstract Type Size (MB) Date Views
PDF 905 KB 31 Jul 2014 4530
PDF 658 KB 09 Jul 2014 3530
PDF 393 KB 27 Jun 2014 12540
PDF 1.07 MB 28 May 2014 1037
PDF 749 KB 08 Mar 2014 2011
PDF 1.46 MB 16 Sep 2013 1227

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Name Type Available During
Tiva C Series TM4C129x MCUs
This 6-part series will introduce you to various features on TM4C129x microcontrollers.
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Getting Started - MSP430 LaunchPad and CC3000 BoosterPack
Learn how to quickly develop Wi-Fi applications using an MSP430 LauchPad.
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Getting Started - MSP430 LaunchPad and NFC BoosterPack
Learn how to quickly develop NFC applications.
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FlowESI GUI – A tool to jumpstart your flow meter design!
This video will walk you through how to use the new FlowESI GUI.
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RS-232, RS-422, RS-485: What are the Differences
This video discusses the differences between three common serial interface standards: RS-232, RS-422 and RS-485.
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