Maintenance And Storage Instructions - Bernard Controls SQ Serie Anleitung Für Die Inbetriebnahme, Lagerung Und Wartung

Settings
Connect a milliampermeter at the place of burden.
- Always start by adjusting the 0/4mA.
- Drive actuator to the position corresponding to the 0/4 mA (closed
in standard),
- Hold the pinion located just under the plate with the «0% position»
marking while driving the potentiometer screw. Adjust the poten-
tiometer so that the output current reaches a minimum value. Turn
backwards until the current value regularly increases then turn
backwards again and stop as soon as the minimum value determined
here above has been reached.
The potentiometer is then positioned at the very beginning of its track.
- Then, use the TAM adjustment screw marked as «0/4mA» to adjust
the current to a value as close to the 0/4 mA as possible.
- Drive actuator to the position corresponding to the 20 mA (open
in standard),
- Turn the screw marked «20mA» in order to read exactly 20 mA
on the milliampermeter.
- Come back to the closed position and check that, for the 0% position,
the signal current shows a close to 0/4 mA and repeatable value.

9 MAINTENANCE AND STORAGE INSTRUCTIONS

Maintenance
If actuator is correctly mounted and sealed, no special maintenance is
required. Check once a year function of motor and make sure that switch
compartment is condensation free. If environment is humid, in oder to
avoid condensation BC electric actuator have installed anti-condensa-
tion heater resistance inside the enclosure.
Storage
The actuator includes electric equipment as well as grease lubricated gear
stages. In spite of the weatherproof enclosure, oxydising, jamming and
other alterations are possible if actuator is not correctly stored.
Actuators stored in a stock room
a) The actuators should be stored under a shelter, in a clean and
dry place and protected from wide temperature variations. Avoid
placing the actuators directly on the floor.
b) For actuators equipped with an heating resistance, it is recom-
mended to connect and power supply it especially if the storage
area is humid (standard 230 VAC, unless other specification).
c) Check that the temporary sealing plugs of the cable entries are well
in place. Make sure that the covers and the boxes are well closed
to ensure weatherproof sealing.
Actuators installed but waiting for electrical connection
If a long period of time is expected between the actuator mounting and
the electrical wiring works :
a) Visually check the tightness of electrical box cover and cable glands.
b) Cover the device with a plastic protective film.
c) For actuators equipped with an heating resistance, it is recom-
mended to connect and power supply it especially if the storage
area is humid (standard 230 VAC, unless other specification).
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