1Instruction Manual
SECTION 1 - INTRODUCTION
The LIQUITRON™ DP5000 Series pH Controllers
are designed for a variety of industrial pH
applications including metal finishing, water
treatment, printed circuit board manufacturing and
waste treatment.
The LIQUITRON™ DP5000 is a microprocessor-
based pH controller with a backlit customized
display and tactile keypad for ease of programming.
The DP5000 allows independent programming of
control methods (‘ON / OFF’ or ‘PROPORTIONAL’)
for acid (Pump A) or base (Pump B) dosage.
Independent high and low pH alarms may be set
with activation of the ‘Alarm relays.’ A third relay
output is available for activating a solenoid valve
or other devices.
The controller is compatible with any pH electrode
that generates a mV signal and allows incorporation
of platinum 1000 W automatic temperature
compensation (ATC) elements. Two point or single
point pH calibrations may be performed. Timer
functions for pump ‘Run’ time and solenoid ‘Delay’
times can be programmed to operate a solenoid
pump valve. An ‘Advanced Menu’ allows selection
of special features such as a ‘Point 3’ (inection
point) for the control proles of the acid or alkali
pumps for finer control. The DP5000 features
continuous non-volatile memory back-up, voltage
selection, pre-amplier outputs, ow and level
switch inputs as standard. 4-20 mA recorder output
is optional.
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