Milton Roy LINC 21593, Инструкция по эксплуатации

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I N S T R U C T I O N M A N U A L
P R O D U C T D E S C R I P T I O N
Scope Of This Manual:
This manual describes and pro­
vides instructions and parts lists
for the LINC-L471, LINC­
L471SC, LINC-LV471 and
LINC-L971 Series Electric Level
Controls.
Product Description:
Used as a high & low level
control, the L471 & L471SC can
activate alarms, provide a switch
input for control systems, or per­
form a variety of desired electri­
cal switch operations actuated
by a liquid or liquid interface.
Operation:
As the float is moved by vary­
ing liquid height, a magnet is
moved closer to or further away
from a switch enclosure. As the
magnet moves closer, a reed
switch in the enclosure closes.
As the magnet moves further
away, the switch opens. The arm
containing the magnet also acts
as a counterweight for the float.
The float is small and will oper­
ate in liquids with a specific
gravity as low as 0.4. The inter­
face type float will operate with
a specific gravity differential as
low as 0.1. The small float per­
mits an economical installation
in locations where other controls
would be cost prohibitive. With
the optional relay mounted in an
explosion-proof case, the control
of larger electrical loads can be
obtained. The manual override
option allows the operator to
manually move the float arm to
the test switch position.
The SC Series is designed to
eliminate the threaded control
connection in mounting with the
use of a bolted ring per API rec­
ommended practice FIND. The
external cage allows for installa­
tion of the control at any elevation.
Features:
• All wetted parts isolated from the environment. These level
controls are safe even in the event of fire.
• *Certified as explosion proof for Hazardous Locations: Class I,
Div. 1, Groups A, B, C, D; Class II, Div. 1, Groups E, F, G; & Class
III, Div. 1.
• All 316 stainless steel wetted parts provide corrosion resistance.
• Our sealed switch assembly prevents dust, dirt, or moisture from
affecting the level control's operation. Classified "Factory Sealed"
by CSA/NRTL/C.
• Cartridge switch assembly provides easy field replacement and
servicing.
• High or low alarm, normally open or normally closed operation
simply by inverting the level control.
*When a relay assembly is used, Class I, Div. 1, is limited to groups C and D.
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