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Guardian Apartments 2013 Case Study

The Guardian Trust Building was one of Auckland’s first high rise buildings, originally constructed between 1914 & 1918 from Kairuru marble and represents a very early example of Chicago-styled striped classical building. This Category 1 Historic Places Trust building was renovated in 2003 and converted into a 180 apartment unit complex.

The conversion included a centralised hot water system

that was proportionally billed to each apartment. Not

surprisingly, some occupants were dissatisfied that the

billing was not linked to consumption and requested

independent water metering be retrofitted.

Being largely steel and concrete construction with

limited access it was decided BMeters ‘Hydrolink’

wireless water meter system was worthy of a trial

installation. The trial would test how effective the

wireless data collection would be within the long,

narrow and winding corridors of the buildings eight

floors and the readings would ultimately show the

occupants had cause for concern.

Rohan MacMillan, from MacMillan Plumbing and

Gas, randomly selected two apartments per floor and

installed hot and cold MBUS ready meters with wireless

transmitting modules. During the next two months,

two readings were taken using the USB wireless

receiver and a laptop computer. Data from 11 of the

32 meters was transmitted and received in the lobby

of the building, while the remaining 21 meters could

be received from the 4th floor lobby and corridor.

The readings taken from the random apartment selection immediately highlighted massive disparities in consumption

ranging from 1m3 to 16m3 during the first months usage confirmed with a similar result from the following months

reading. It didn’t take long for the building management to conclude the trial was an unbridled success and the

remaining 164 apartments were given approval for the immediate installation of the BMeters Hydrolink system.

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Wireless Water Meter System

The HYDROLINK wireless water meter system allows the remote collection and transmission of data recorded by the meter via a wireless network. According to budget a range of transmitting and receiving hardware options are available from simple ‘walk by’ to fully automated GPRS transmission solutions.

• Significant time and cost saving

• Attempted fraud detection • Error free data reading and transcription • Easy to use software

The HYDROLINK system uses the M-BUS wireless transmission protocol and will piggy back 3rd party power and or gas reading equipment on the same system.

2015v1

TRANSMIT DATA RECEIVE DATA

15 - 50mm MBUS Meter+ TX Transmitter

TXE Pulse meter transmitter for up to 2 pulse meters

15 - 50mm Pulse Meter

Maximum range up to 300m without repeaters

RPT signal repeater to extend the data transmission range and network multiple meters. GPRS to transmit data via

mobile phone network to PC

RX2 USB receiver for on site data collection

RBT wireless receiving module for on site data collection and ‘Bluetooth’ pairing to an ‘Android’ device phone app.

Transmission Data:Serial number• Date of reading• Current water consumption m• 3

Historical monthly water consumption m• 3

Alarms and WarningsMagnetic fraud attempt• Attempted optical fraud or optical error• Reverse flow detection and recording• Low battery• Overload at Qmax for a pre determined • amount of timePossible leak detection•

Software description:The Hydrolink licensed software is supplied with the receiving hardware and can be used across multiple installations. It allows for simple and easy data management on any windows PC or device.Configuration options:

Data encryption enabling• Alarm enabling• Data transmission intervals and days• Associate meter serial numbers and end • user detailsConsumption history setting• Set specific surveys e.g. final readings• Export data in CSV or XML format•

RX2 USBReceivingModule

RangeUp to 300 meters in ideal conditionsConnection & power supplyUSBData transmission frequency868MHzTransmission protocolWireless MBUS EN13757:4Antenna1/4Dimensions65mm x 22mm x 15mmProtectionIP50

GPRS Receiving& TransmittingModule

Power supplyLithium battery 3.6V, replaceableBattery life5 years(1 read & send of data/month)Radio interfaceWireless Mbus EN 13757-4 868MHz. GSM\GPRSInterfaceQuadBand 850/900/1800/1900 MHzAntennasGSM e 868 MHz IntegratedRadio receiving sensitivity-90 dBm (868 MHz)

Dimensions126mm x 123mm x 63mmConfigurationBy user-friendly softwareConfiguration modesLocal (RS232),Remote (GPRS, SMS)Mounting modeWall mountingOperating temperature range -20°C to +60°CEnclosure protectionIP68

RBT BluetoothReceivingModule

RangeUp to 300 meters in ideal conditionsPower Supply2xAA 1,2V rechargeable NiMh batteriesBattery Life10 yearsData transmission frequency868MHzTransmission protocolWireless MBUS EN13757:4Radio transmissionBluetooth Class 3Supported pairing devicesAndroid O.S. bigger than 2.3

TXE Pulse MeterTransmittingModule

RangeUp to 300m in ideal conditions Power supplyLithium battery (replaceable)Battery life10 years + 1 year of data storage(in normal working conditions) Optimal working temperatures0°C to +40 °CLimit temperatures-10°C to +55 °CReading unitsConfigurableSensor reading2 inputs REED sensorsShielding rateIP65

Power transmission<10mWWorking frequency868 MHzData transmission frequencyProgrammableData transmission encryptionOptionalType of readingMonodirectionalOperational modeWireless MBUS T1 modeSetup modeWireless MBUS T2 mode

TX1 WirelessTransmittingModule

RangeUp to 300m in ideal conditionsPower supplyLithium battery (sealed)Battery life10 years + 1 year of data storage(in normal working conditions)Optimal working temperatures0°C to +40 °CLimit temperatures-10°C to +55 °CAnti-fraud shieldMagnetic/opticalMinimum reading1 liter gsd-RFM-TX1Sensor readingInfrared

Shielding rateIP65 (IP68 upon request)Power transmission<10mWWorking frequency868 MHzData transmission frequencyProgrammableData transmission encryptionOptionalType of readingMono-directionalOperational modeWireless MBUS T1 modeSetup modeWireless MBUS T2 mode