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.
Universal output N2 has identical parameters and works in the
same way as Universal output N1 in the logical mode.
The flowmeter is delivered preset so that the universal outputs are
disabled.
CAUTION!
When the flowmeter works together with "VZLJOT
TSR-M" heat meters, it is recommended to set Universal output N1 to
the pulse mode.
1.4.6. Logging
1.4.6.1. Measurement results are recorded into the flowmeter's internal logs:
hourly, daily and monthly logs. Logs are accessed via RS-485 interface.
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
- Time of errors
– duration of error situation
- Operating time
– time of totalizer operation.
1.4.6.2. Modifications made on the operation mode are logged in the Mode log
with a capacity of 100 records.
Mode log format is as follows:
- Order number of the record
- Name of the active operation mode
- Date and time of activation.
1.5. Design
1.5.1. The Measuring pipe section (PS) with the Secondary converter (CS) in-
stalled on it are delivered as an assembly unit (see Fig. A1, Appendix
A).
The PS is made of metal. It comes with flanges installed on its ends
to connect the PS to the pipeline via rubberized asbestos fabric gas-
kets.
1.5.2. Electro-acoustic converters
1.5.2.1. PEAs alternately operate in two modes: transmitter mode, in which the
electrical pulse signal coming from the CS is transduced into ultrasonic
waves, and receiver mode, in which ultrasonic waves in liquid are
transduced into the corresponding electrical signal.
1.5.2.2. The flowmeter works with built-in PEAs.
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