AFLOWT BUF, Руководство по эксплуатации

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quency value is 1000 Hz for ADJUSTMENT mode and 100 Hz for
OPERATION and SERVICE modes.
CAUTION! Please note that the higher the value of maximum
frequency, the faster the battery is discharged. The recommended
Fmax value is 8 Hz.

In the pulse mode, a burst of pulses is generated on the output
within a second, in which the number of pulses (considering Pulse
weight ) corresponds to the flow volume measured over a previous
second. Maximum pulse repetition rate permissible in a burst (me-
ander-like, period-to-pulse duration ratio of 2) is 1000 Hz in AD-
JUSTMENT mode and 100 Hz in SERVICE mode.
CAUTION! Please note that increasing the number of pulses in a
burst results in a faster discharge of the battery. It is recommended to
set the value of pulse weight so that the number of pulses in a burst
does not exceed 8.
To provide correct work of Universal output, the parameters " Con-
version factor calculation " (pulses/m
3
) in the frequency mode and
“
Pulse weight calcul.
”
(m
3
/pulse) in the pulse mode are calculated
automatically.
The conversion factor is calculated on the basis of user-specified
values set for the " Lower limit by flowrate " and " Upper limit by
flowrate " parameters and " Maximum output frequency " parameter.
The pulse weight is calculated from the values set for the " Up. limit by
flowrate " and " Pulse width " parameters. The pulse width can be set in
the range 1 to 500 ms.

In the logic mode, one signal level corresponds to “event” (or its
state) and the other level corresponds to “no event” (or another
state).
Programmatically this means: " Active level ", i.e. " Low " or " High "
signal level is set when the event is present. Electrical parameters of
corresponding signal levels are specified in Appendix B.
The flow meter is delivered preset so that the universal output is
disabled.
1.4.6. Logging
1.4.6.1. Measurement results are recorded into the flow meter's internal logs:
hourly, daily and monthly logs. Logs are accessed via RS-485 and M-
Bus interfaces.
Hourly, daily, and monthly logs are arranged as circular buffers and
have the same structure.
Log capacity:
- Hourly log
– 120 records (hourly records)
- Daily log
– 45 records (daily records)
- Monthly log
– 48 records (monthly records).
Format of one record is as follows:
- V+
– total volume for direct flow over logging interval, m
3
(l)
- V-
– total volume for reverse flow over logging interval, m
3
(l)
- Errors
– code of error situation