10
Instruction Manual
SECTION 3 - INSTALLATION
3.6 pH ADJUSTMENT PUMP(S)
There are two (2) versions of the DP5000, one
is the ‘ON / OFF’ Output and the second is
‘PROPORTIONAL’ Output.
The ON / OFF Output DP5000 pH Controller will
operate any pH adjustment pump(s) which operate
on the same line voltage as the controller itself.
Combined continuous controlled load must not
exceed 4A @ 115 V or 2A @ 230 V. To ensure
efcient control, the pumps should be capable of
delivering at least 150% of the maximum pumping
requirement. Install and calibrate the pumps
according to the manufacturer’s recommendations.
The Proportional Output DP5000 pH Controller
will operate any LMI
®
AA9, AA7, B9, B7, C9, C7
and E7 pump, or any other pump which operates
by providing direct proportional response to a
modulated pulse input signal. The pumps must
be set to the ‘external’ control mode. To ensure
efcient control, the pumps should be capable of
delivering at least 150% of the maximum pumping
requirement. Install and calibrate the pumps
according to the manufacturer’s recommendations.
3.7 KEYPAD AND DISPLAY
The DP5000 pH Controller menu allows the user to
input all the variables necessary to customize the
controller for the application. The keypad is used
for all programming (see Figure 7).
BASE
ACID
PUMP B
ALARMS
mA
- TIMERS -
CALIBRATE
HOLD 5 SEC
MENU
RUN
EDIT
DISPLAY
PUMP A
LQUITRON™ DP5000
LMI
Figure 7. Keypad
Keys:
This key is used to set up the control
prole for the acid dosing pump. (Holding
the key for ve (5) seconds will allow
priming of Pump A) (Factory setting
90 SPM).
This key is used to set up the control
prole for the base (alkali) dosing pump.
(Holding key for ve (5) seconds will
allow priming of Pump B) (Factory setting
65 SPM).
This key is used to program the high
and low alarm points and hysteresis
(ON / OFF mode). It also allows
programming of the mA output when
installed.
ACID
PUMP A
BASE
PUMP B
ALARMS
mA
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