Optional Extras / Accessories - Obsolete 732.51.2170 Instructions D'utilisation

10. Optional extras / Accessories

10.2 Alarm contacts, modular design -oilproof
These alarm contacts are fitted into the case of a pressure gauge and intended to make or
break an electric control circuit relative to the position of the instrument's pointer.
Please refer to data sheet AC 08.01 for technical data.
The oilproof alarm contact, modular design, is a self contained unit, which can be built onto
GB
the pressure gauge within a few minutes.
The alarm contacts provide IP65 ingress protection even for even for oil-filled gauges.
The connection to the instrument pointer is made by means of a special fork so that a
carrying pin at the pointer itself is not necessary. By means of this simple mounting, the
instrument can be converted into a contact measuring instrument quickly and inexpensively.
The alarm contacts mainly comprise:
T the pre-wired alarm contact, which is provided with a special foot and a fork coupling
T a transparent hood (polycarbonate) with dovetail lead into which the alarm contact is
pushed and which is fastened by means of a recessed head screw
T a 4-pin plug socket, which is injection-moulded or welded to the transparent hood and
cast to be oilproof
T an oilproof, adjustable lock, which is mounted in the middle of the transparent hood.
T pre-assembled sealing ring
The desired value indicators of
the built-in alarm contact are
adjusted to the value at which
the contact is supposed to
switch from the outside via the
adjustable lock using a
separate or a rigidly mounted
spanner.
The alarm contacts are
designed to allow the
instrument pointer to move
beyond the adjusted desired
value indicator after contact
actuation takes place,
although the contact actuation
will be maintained.
The design therefore
guarantees a stable switching
condition, which corresponds
to the position of the
instrument pointer, even if the
power fails.
8
Plug screw
Plug with cable
Plug seal
Plug socket
Type plate screws
Type plate
Front plate
Connection
Transparent hood
Spiral spring
Special foot
with dovetail lead
WIKA Operating instructions compact differential pressure gauge
Spanner
Adjustable lock
Metal flag
Adjustable pin
Carrying arm
Contact pin
Magnet carrying
plate
Screw-in magnet
Desired value
indicator, red
Contact arm with
plate spring
Coupling fork
Ruby bearing
Carrying pin of coupling fork
Bayonet rim