APG KA Cable Suspended user manual - Manual (Page 4)

KA Series Rev. A2, 12/08
4
Automation Products Group, Inc.
APG...Providing tailored solutions for measurement applications
Tel: 1/888/525-7300 • Fax: 1/435/753-7490 • www.apgsensors.com • [email protected]
• Introduction
KA series controls consist of a free fl oating switch enclosure to which
a protected multiconductor cable is attached. Inside the fl oat there are a
number of microswitches set at diff erent angles. A control weight is fi xed
at a point along the cable to keep the cable immersed in the liquid. The
suspended fl oat switch follows the movement of the liquid level. As the liquid
level rises and falls, the weight on the cable causes the inclination of the fl oat
to change. This tilting action results in microswitches opening and closing,
sequentially, at diff erent elevations. By separating the switching levels,
turbulence problems are overcome. The switch operating levels are easily
adjusted by moving the weight along the cable and/or altering the height of
the cable fi xing point.
The switch enclosure is conical
in shape and the required number
of microswitches are cast at
predetermined angles inside it. The
hermetically sealed fl oat housing is
fi lled with plastic foam and is weighted
on one side. This rugged fl oat and
the weight are made of chemically
resistant polypropylene while the
standard cable is PVC coated.
There are two versions of the KA
series switches. The standard series
Alarms Control Plus Alarms
Level IL IH IC 2HL 2L 3L 2H 3H 4L 4H 4L5E 4H5E
(1LE) (1HE) (3LE) (3HE)
HH — — — High — — —
High Alarm Stop Both High
Alarm Pumps Alarm
Pump
Pump Pump Pump Start Start
H — — — — Stop
Start Stop Start Pump Pump
No.1 No.2
Pump Pump Pump Pump Start Start
L — — — — Start
Stop Start Stop Pump Pump
No.2 No.1
LL Low High
High/Low Low — Low — — Low Alarm Stop Both
Alarm Alarm Alarm Alarm Alarm Pumps
O Height of Face of Float in Free-Hanging Position