Flowmeter SVTU-11B, Руководство по эксплуатации

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5.10.4 R
Т
D are installed in pipelines in special thermometer pockets or bushes (in ac-
cordance with the order) on the flow and return pipes of heat exchange system.
5.10.5 The length of connecting cables is determined according to a lay-out of meter
components and can be within the limits:
−
from 2 to 10 m (max 30 m) for ultrasonic flow sensors,
−
from 2 to 10 m (max 30 m) for temperature sensors,
−
from 2 to 10 m (max 30 m) for pressure sensors,
−
from 2 to 30 m (max 50 m) for RS-232 interface.
Extending cable length up values in squares possible only by additional agreement.
6 Marking and sealing
6.1 Meter marking on the calculator contains the following data:
−
name and reference designation of water meters;
−
trade mark of the manufacturer;
−
accuracy class (meter’s modifications
М
1 or
М
2);
−
environmental class;
−
serial number;
−
date of manufacture (two last digits of a year, printed before serial number).
On the indicating device of water meters:
−
flow rate limit values.
On the flow measurement section:
−
nominal bore;
−
flow direction arrow;
−
maximum operating pressure.
Serial numbers of R
Т
D and FS are put on their bodies.
6.2 FS marking contains nominal diameter DN and maximal operational overpressure
value
Р
N.
6.3 Meter components are sealed up to prevent a non-authorized access to adjustment
of meter’s readings.
6.4 The calculator is sealed up by two mastic seals. Seals are put on fixing screws on
lateral covers. For mastic fixing sealing cups are provided under screw heads.
For realization of additional sealing by means of a lead seal, the screws with holes in
heads on lateral covers are stipulated. On customer’s demand the replacement of these
screws by additional sealing cups is possible.
Marking of connecting cables are put on labels located near corresponding connectors.
7 Packing and marking
7.1 Marking of transport container has specific instructions "CAUTIOUSLY FRA-
GILE", “PROTECT FROM MOISTURE”, "TOP".
7.2 Meter components are packed into the boxes in accordance with drawings of manu-
facturer.