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The meter is equipped with an automatic terminal cover opening sensor. It is activated two
minutes after the meter is correctly connected and switched to mains voltage and the
terminal cover is properly installed. The removal of the terminal cover by activated
protection is indicated by a marker triangle at the top of the display below the inscription
"CZO".
- Before the meter is first put into service, the triangle under the inscription 'CZO'
indicates whether the terminal cover is open (triangle visible) or closed (triangle not
visible).
- If the terminal cover is properly fitted, the triangle 'CZO' shall not be visible.
- After the first commissioning (installed terminal cover + mains voltage is ON for at least
2 minutes) the protection will be activated automatically and all terminal cover removals,
even without mains voltage ON are registered going to be registered in the event log.
- If the terminal cover is removed by active protection, beside the marker below 'CZO' an
'exclamation mark in a triangle' symbol indicating an error will be displayed.
- To eliminate the error triangle indicating an opening of terminal cover, press the
sealable button first. The display will show 'tAnPErSt'. Then, press and hold the sealable
button for at least three seconds until 'success' appears.
Attention! Clearing the terminal cover opening simultaneously deletes the marker
triangles of all other markers like "RPM" indicating any registered magnetic influence
attempts.
The connection of the measuring equipment must be carried out asymmetrically according to
DIN standard (according to the wiring diagram below). The meter has cage clamp terminals
thanks to which, if permitted by the installation regulations of the service provider, there is no
need to use cable sleeves even in the case of multi-core copper wires. Minimum 2,5 mm
2
and
maximum wire cross-section: 35mm
2
, maximum tightening torque of the main terminal screws
is 3 Nm.
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