Product Description
Honeywell Home EW773 Series ultrasonic meters are static compact heat or chilled water meters with electronic measurement based on the ultrasonic principle, consisting of an electronic energy calculator, an ultrasonic flow sensor and two temperature sensors.
They are used for metering of hydronic heating and/or cooling energy in hydronic systems based on volume, supply and return temperature. EW7730 models are suitable for energy metering in heating systems only. EW7731 models are suitable for energy metering in heating, cooling or combined systems.
Technical Properties
| Approvals |
- Heating: MID DE-10-MI004-PTB013, class 2
- Cooling: DE-16-M-PTB-0001
- CE
|
| Medium |
heating or chilled water |
| DN size |
65 mm |
| Connection |
Flanges PN25 |
| Maximum operating pressure |
25 bar |
| Media temp. |
5 ... 105 oC |
| Nominal flow (qp) |
25 m3/h |
| Length |
300 mm |
| Measuring process |
ultrasonic |
| Display functions |
LCD, 8-digit |
| Power source |
- Standard: - A-cell lithium battery 3.6 VDC with 11 year nominal lifetime
- Optional: - D-cell lithium battery 3.6 VDC with 16 year nominal lifetime - 24 VAC mains power supply with integrated, replaceable backup battery - 230 VAC mains power supply with integrated, replaceable backup battery
|
| Interface |
M-Bus |
| Interface type |
Retrofittable (one slot) |
| Dynamic range |
250:1 |
| Features |
- Ultrasonic measuring principle
- Dynamic range of 250:1 (qp:qi) in class 2
- Detachable calculator unit with connection cable 1.5 m long and wall mounting plate for wall attachment
- High battery Efficiency, A-cell: battery lifetime up to 11 years D-cell: battery lifetime up to 16 years
- High long term stability, tested and verified by independent AGFW test
- Insensitive to dirt
- No moving parts in the flow
- ZVEI optical interface
- Optionally with integrated Radio OMS (Open Metering Standard), 868MHz
- Remote reading with up to two add on plug and Play modules
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