AFLOWT BUF M, Руководство по эксплуатации

Страница: 6 / 56

6
1.2 Specifications
1.2.1. Specifications of the flow meter AFLOWT BUF M of BUF-310 version are
listed in Table 1.
Table 1
Parameter
Value Notes
1. Nominal diameter of the pipeline, DN 80
2. Minimal measured average volumetric flow rate
Q
min
, m
3
/h
0.25
3. Maximal measured average volumetric flow rate
Q
max
, m
3
/h
90.0
4. Sensitivity threshold, m
3
/h 0.057
5. Maximal pressure in the pipeline, MPa 1.6
6. Properties of working fluid:
-
temperature, °C
- density, kg/m3
- gas occlusion content, % of volume
0 to 50
700 to 1200
no more than 5
7. Power supply voltage, V 3.6
see clause
1.2.6
8. Mean time to failure, h 75000
9. Mean life time, years 12
1.2.2. The flow meter provides indication of the measured parameter values with
the digit specified in clause 1.5.5.1 of this manual.
1.2.3. The flow meter provides that the results of measurements can be output-
ted to:
- Universal output in the form of frequency, pulse or logic signal
- logic output
- RS-485 and M-BUS interface
- Wireless M-Bus interface
- NFC interface.
1.2.4. The flow meter provides storage of measurement results in the following
logs:
- Hourly log
– 1440 records (hourly records) – 60 days
- Daily log
– 460 records (daily records)
- Monthly log
– 48 records (monthly records)
- Mode log
– up to 1000 record
- Operating mode log
– up to 4000 records.
When powered off, the flow meter stores measurement results and
configuration settings for no less than 1 year.
1.2.5. Environmental resistance:
- To climatic influences
– the ambient temperature range is from 5 to 50 °C,
relative
humidity is not more than 80% at temperatures up to 35 °C, with-
out moisture condensation
- To mechanical stress
– vibration in the frequency range from 10 to 55 Hz
with an amplitude of not more than 0.35 mm