MARKING AND SEALING THE METER
Marking the Meter
The following is indicated on the front panel of the electronic unit of the meter: The manufacturer’s trademark, type and
the type number of the meter, EU–type examination certificate number, factory number, year of manufacture, temperature
measurement range, temperature difference measurement range, accuracy, environmental class according to LST EN1434-1,
electromagnetic and mechanical environment class, flow measurement range (q
i
, q
p
, q
s
), temperature range for the sensors,
maximum allowable working pressure, types of communication interfaces (excluding optical ones), and supply voltage (in the
case of external power supply)
The following is indicated on the housing of the flow sensor:
• The type of connection (thread or relative diameter)
• The flow direction
Destination of wire communication interfaces , additional inputs and outputs, and wires of external power cables is marked
with the color of the cable wires and an additional label on the cable indicating the destination
The temperature sensor intended for mounting in the higher temperature pipeline is marked with a red marking pipeline
sign; that intended for mounting in the lower temperature pipeline is marked with a blue pipeline sign
Sealing the Meter
Sealing the Heat Meter Calculator
No additional sealing applies to the electronic unit of a newly manufactured heat meter Access to elements fixing the
opening of the box, configuration change activation contacts, and adjustment data change activation contacts are protected
by special easily breakable partitions (see
)
(a)
(b)
(c)
Figure 33: Access to elements fixing the opening of the box (a), configuration change activation contacts, and adjustment data change activation contacts (c)
(partitions easily breakable with a tool)
After opening the box, changing the configuration, or adjusting the meter (when the special partitions were broken out for
this purpose), you must seal the opened slots with sticker seals:
• The two slots marked LOCK for access to the elements fixing the opening of the box are sealed with test sticker seals See
(a) in
,
• The slot marked SERVICE for access to the configuration change activation contacts is sealed with the supplier’s sticker
seal See (b) in
• The slot marked ADJ for access to the adjustment data change activation contacts is sealed with the supplier’s sticker seal
See (c) in
Sealing the Heat Meter Flow Sensor
Attach the manufacturer’s warranty sticker seal to seal the protective cap fastening screws
After installation, seal the temperature sensor fastening screw with mounting seals See
Marking and Sealing the Meter
Page 51
November 2020
HYB-UM-03193-EN-02