Nordson 3100V Series Customer Product Manual page 372

Low Level
lndicator
E 2-1
Section
E
2
Low Level lndicator
1.
lntroduction
WARNING:
Allow only
qualified personnelto perform the
following
tasks.
Observe and follow the safety instructions
in
this document and all other related documentation.
The low level indicator sends
a
signal
to an external device when the
adhesive level
in
the applicator's tank is low. The external device can
be
a Nordson vacuum hopper feeder that automatically adds more adhesive,
or a
customer-supplied light that warns operators when the adhesive
level is
low.
The low level indicator consists of
a
float, counterweight, lever
rod,
mercury switch and terminal block. The float is balanced by the
counterweight to ride half in and half out of the hot melt material. As the
adhesive level drops, the float attached to the lever rod drops down. The
mercury switch attached to the lever
rod
tilts
forward. This
action causes
the mercury switch to close and activates the terminal block.
The indicator is intended for 30 VAC maximum, Class 2 circuit operation
as defined in Article 725
ot
the National ElectricalCode.
Gtr)97
Nordson
Corporalion
All ,ights
reserved
41-3000v
lssued 6/97
E2EN-03-[3V-LLll-4