Flowmeter SVTU-11B, Operating Manual, Page: 17 / 68

17
Power on time
Т
power – total time when the device power supply voltage is on. It is
indicated on the meter display in a mode “Indication of additional parameters” and also is
presented in a daily archive printout.
Power off time (idle time
Т
idle or non-work time) – total time when the device pow-
er supply voltage is off. It is displayed on the meter indicator in a mode « Indication of ad-
ditional parameters», and also included in daily report.
Current date/time – current time (taking into account daylight saving). It is indicated
on the meter display in a mode “Indication of additional parameters”. Automatic switch
to daylight saving time mode can be on/off.
Measurement, indication and registration of above-listed parameters are carried out in
hours. In figure 5.1 the timing sheet is represented. It explains how time of correct work
Т
run and time of non-working condition
Т
nw for accounting period
Т
acc are resulted. Dur-
ing
Т
run authentic measurement of all parameters was made , during
Т
nw there is no regis-
tration of any parameter or there is no power supply voltage (battery disconnected).
Figure 5.1
5.9 To connect to external devices RS-232C is applied. RxD, TxD, DTR, RTS lines are
used.
5.10 Meters have a few separate modules which connected between themselves. They
are calculator, temperature sensors, flow measurement section with ultrasonic flow sensors,
pressure transducers.
5.10.1 The calculator housing has four control buttons, the digital display, slot for con-
necting cable.
Water meter control buttons are described in chapter 11 and Appendix D.
5.10.2 Meter’s digital display has two sections. The first one contains a 8-bit 7-
segment indicator and specific symbols. In this section the measuring data and units are dis-
played. The second section is a row for displaying text information. It is arranged in the up-
per part of indicator. This section is enabled if the user needs to see additional information
and complete some kind of actions in device menu.
The basic working mode of the meter is displaying measuring data from main menu. At
this time the second section is switched off.
5.10.3 FS is a spool piece with flanges and bushes for mounting ultrasonic flow sen-
sors. FS sizes (linear and angular) have rigid tolerances to achieve required measuring accu-
racy and stability in operation. Sizes are resulted in the table 4.2, and also in the Appendix L.
Т
run
Т
power
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idle
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err
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nw
Т
acc