Measurent of cold and warm water with very high measuring accuracy The water meter is a static meter and it measures flow based on thr ultrasonic principle. The meter has no movable parts and therefore retains its accuracy throughout its life span. The readings are registered in the integrated electronic register and can be communicated either by wired M-Bus or by wireless M-Bus (OMS).
| Dimension range | G 3/4 to G 2 |
|---|---|
| PN | 16 |
| Temperature range | +1ºC to +70ºC |
| Material | Brass/Composite |
| Article number | Amount |
|---|---|
| AT 7450A15-2,5wM | |
| AT 7450A20-4wM | |
| AT 7450A25-10wM | |
| AT 7450A40-16wM |
Meter accessory for installation of water meter. Like couplings, fittings and check valves. Loose water…
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Water meter console, in stainless steel performance. Available with adjustable wall distance, built…
Select| Dimension range | PN | Temperature range | Material |
|---|---|---|---|
G 3/4 - G 2 | 16 | +0,1 °C to +70 ºC | Brass/Composite |
| Q3 2,5 | Q3 4 | Q3 6,3/10 | Q3 16 | |||||
|---|---|---|---|---|---|---|---|---|
| Connection after DN | 15 | 20 | 25 | 40 | ||||
| A (Length) | 110 | 190 | 260 | 300 | ||||
| B wM-bus | 113 | 113 | 124 | 139,5 | ||||
| B M-bus | 132 | 132 | 142,4 | 158 | ||||
| C | 17 | 17 | 25,4 | 33 | ||||
| D | 93 | 93 | 93 | 93 | ||||
| Connection, meter | 3/4" | 1" | 11/2" | 2" | ||||
| Weight | 1 | 1,2 | 1,8 | 2,4 | ||||
| Measurements in mm, weight kg | ||||||||
The water meter is an ultrasonic meter with an accuracy Ratio of R400. This means that the meter measures extremely thoroughly even at a low flow and across the entire flow range. The meter has an electronic counter and is battery driven with up to 15 years life span under normal operational conditions. The meter has no moveable parts and is therefore mostly maintenance free. It is not affected by air bubbles, sand, particles or network-specific features such as pressure drops or overload flow.
The meter has a high update frequency with low power consumption. The meters design allows mounting of the the meter in any position under the condition that the meter is installed with the flow arrow in the the flow direction.
Remote reading possibilities are wired M-Bus and wMbus (wireless M-bus). Wired M-Bus with baudrate 300-2400 bp according to EN 13757. The wireless M-Bus protocol, supports OMS. Signal power is 25 mW and signal strength is 12 dBm.
| Meteorological properties | 7450A15-2,5 | 7450-20-A | 7450A25-6,3 | 7450A25-10 | 7450A40-16 | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Q3 | Permanent flow, m3/h (meter size) | 2,5 | 4 | 6,3 | 10 | 16 | ||||||
| R | Ratio (Q3/Q1) | 400 | 400 | 400 | 400 | 400 | ||||||
| Start flow, l/h | 2,0 | 2,0 | 6 | 6 | 15 | |||||||
| Q1 | Minimum flow, l/h (tolerance +- 5%). | 6,4 | 10 | 15,8 | 25 | 40 | ||||||
| Q2 | Boundary flow, l/h (tolerance +-2%). | 10 | 16 | 25 | 40 | 64 | ||||||
| Q4 | Overload flow, m3/h | 3,125 | 5 | 8 | 12,5 | 20 | ||||||
| The values in the table above are well within the meteorological properties that are described in Swedac's regulations for MID 2004/22/EC and EN 14154 (Machine Instrument Directive) | ||||||||||||
| Material meter body | Brass CW617N |
| Temperature range cold water: | 0,1o C up to 70o C |
| Ambient temperature: | 5 oC till 35oC |
| Nominal Pressure class: | PN 16 |
| Mechanical environment class | M2 acc. to. MID, fixed installation with minimal vibration |
| Electromechanical environment class | E1 och E2 acc. to. MID, residential houses and commercial properties |
| Protection class: | IP68 |
| Operational temperature: | -15o C (min. flow 100 l/h to prevent freezing) up to + 60o C |
| Remote reading radio: | - Wireless wM-Bus mode T enl. EN13757-4 |
| - T1 mode, OMS | |
| - Wired M-Bus | |
| Radio frequency: | 868 MHz (standard) |
| Flow range | Q1 - Q2 (Qmin - Qt) | ± 5% |
| Q2 - Q4 (Qn - Qmax) | ± 2% |
- Couplings and consoles
- Transition valve from Q3 2,5 to Q3 4 190mm
- Other lengths on request
- Installation accessories, consoles and parallel couplings see product sheet for AT 7358, 7359, 7360
- Customer specific serial number, bar code, logotype printed on the gauges top part/side.
For remote reading through wM-Bus or wired M-Bus , the meter needs to be connected to a M-Bus master unit/gateway.
The meter body can be installed in any position, regardless of flow direction without affecting its meteorological properties. The meter measuring principle is based on the ultrasonic principle and is activated when installed. Surrounding operational temperature should be within +60°C down to -15°C (assuming a minimum flow of 100 l/h to prevent freezing). For more detailed information regarding installation see the instruction manual.
To secure the long term operation, the installation should always be performed with a water meter console (see under accessories). Shut-off valves should always be mounted on the console's in and output.
The back flow protection after the water meter should be a protection module type EA (controllable check valve) AT 1159 with shut-off valve mounted on the input side, alternatively cartridge check valve AT 7059 should be mounted in the meter's output.
Before the water meter is mounted, it's important to flush the pipeline.
When charging of household consumption using the meter's registreted counter it should be done according to Swedacs regulations STAFS 2007:2, which means that recurring control of (meter revision) with an interval of at max 10 year for Q3 4 and max 5 years for Q3 10-16. Control and revision is performed by the meter workshop that is the accredited control body.
The meter has no movable parts. The life span of the lithium battery is calculated to be up to 15 year under normal operational conditions. The battery is not replacable but extractable for recycling.
| Dimension DN | Meter size (m3/h) | Article number | Communication | RSK-number |
|---|---|---|---|---|
| 15 | Q3 2,5 | AT 7450A15-2,5M | M-Bus | 5182371 |
| AT 7450A15-2,5wM | wM-Bus | 5182366 | ||
| 20 | Q3 4 | AT 7450A20-4M | M-Bus | 5182372 |
| AT 7450A20-4wM | wM-Bus | 5182367 | ||
| 25 | Q3 6,3 | AT 7450A25-6,3M | M-Bus | 5182373 |
| AT 7450A25-6,3wM | wM-Bus | 5182368 | ||
| 25 | Q3 10 | AT 7450A25-10M | M-Bus | 5182374 |
| AT 7450A25-10wM | wM-Bus | 5182369 | ||
| 40 | Q3 16 | AT 7450A40-16M | M-Bus | 5182375 |
| AT 7450A40-16wM | wM-Bus | 5182370 |
