AFLOWT BUF, Руководство по эксплуатации

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- 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 Operation
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.
The design of the flowmeter's depends on the pipe connection type
and may be as follows:
- Flanged type (DN32-DN300): PCF flanges are bolted to the mating
pipeline flanges (see Fig.A.1 Appendix A);
- Threaded coupling connection type only DN32, DN40 and DN50 (see
Fig.A.2).
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 flow meter works with built-in PEAs.
The built-in PEAs come in cylindrical case with the transmitting
plane in the form of a disk in the flat end. The built-in PEAs are
mounted onto the Measuring pipe section so that the transmitting
(radiating) plane contacts the medium. Pipeline-PEA contact surface is
sealed.
The PEAs and CS are connected by twisted pair cables.
1.5.3. The CS is directly installed on the measuring PS and includes
Measurement and Calculation board. The board is placed in the trans-
parent cover of the case (on the front panel, see Fig.A.3). The cables
connections with the PEA and the interface cable are entered into the
case through cable glands of SKINTOP type.