CONDUCTIVITY
SENSING
RINSE WATER CONTROLLER
DESCRIPTION
The Remco conductivity sensing controller provides a simple way
to insure that a rinse tank stays clean. The unit is in a waterproof
Nema 4x rated housing, designed for easy installation and maintenance.
Weekly acid dipping of the probes is all that is needed to maintain
the system in peak operating condition. There are three different
types of mounting brackets available: one for welding to polypropylene
tanks, one for bolting to metal tanks and one for bolting to plastic
tanks.
The Remco conductivity sensing controller features a single probe,
conductivity sensing system. The probes, constructed of stainless
steel, titanium, monel or other conductive material, sense the
solution resistance. These probes are connected to a circuit card
in the main housing that controls the logic functions. The circuit
logic controls a 3/4" solenoid valve that feeds water to
the tank. A single turn potentiometer on the logic board sets
the resistance (conductance) which triggers the solenoid. An optional
flow restrictor provides rate control.
OPERATION
As the probes sense the water in the rinse tank, the logic board
compares the probe resistance with the setpoint resistance. When
they are equal or the probe resistance is greater than the setpoint,
no water is added to the tank. When the tank resistance is less
than the setpoint, the solenoid is turned on until the resistances
are equal. The setpoint is determined from a graph of ppm vs.
resistance supplied with each unit. A potentiometer on the logic
card is used to set the resistance.
Generally, these systems are low maintenance. When used with DI
water systems, maintenance is almost never needed. When used with
non-softened water, probe cleaning is required to prevent scaling
of the probe. Weekly acid dipping is all that is required.
FEATURES
1. Low cost, complete system.
2. Mounts to all tanks. Bolt on installation or weld on permanently.
3. Fail safe operation, manual override on solenoid if control
should fail.
4. All corrosion resistant construction, designed for corrosive
area operation.
BENEFITS
1. Controls water use.
2. Removes operator control of rinse water flow.
3. Keeps rinses clean, controls contamination level.
4. Reduces waste treatment costs by reducing water use.
Ordering information: PN: 2690-A-B-C-D-E-F-G-H
A. Specify bracket type (no standard)
1=polypropylene weld on, for a polypropylene tank
2=polypropylene bolt on tank lip
3=stainless steel to bolt on tank lip
B. Specify voltage (110 v 60hz stock)
110 = 110 volts (standard)
24 = 24 volts
C. Specify probe material (bath composition)
304 = 304 stainless steel
316 = 316 stainless steel (standard)
Ti = titanium
Mon = monel
Ld = lead
Cp = conductive plastic
Gr = graphite
D. Specify probe length in inches (2 leads)
p(xx) = 12 inches (standard)
E. Specify optional flow restrictor or control
n = none (standard)
r(x) where x = flow rate in gpm
bv = ball valve
F. Specify probe cable length (12" standard)
pc(xx) = xx in inches
pc12 = 12 in probe cable length
G. Specify valve cable length (60" standard)
vc (xx) = xx in inches
vc 60 = 60 inches
H. Conduit hole (none standard)
n = none (standard)
y = yes (as on diagram 2690 O&M, valve to right)
r = reverse side
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