LMI DP5000-6A, DP5000-1B, DP5000-3B, DP5000-6B, DP5000-01B Instruction Manual

Instruction

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Liquitron™ DP5000 Series

Manual Manual

Manual

Manual Manual

pH Controller

For file reference, please record the following data:

Model No:

Serial No:

Installation Date:

Installation Location:

When ordering replacement parts for your LMI Controller or accessory, please include
the complete Model Number and Serial Number of your unit.

201 Ivyland Road

Ivyland, PA 18974 USA

TEL: [phone]

FAX: [phone]

http://www.Imipumps.com

Replaces same of Rev. F 4/01

1756.G 2/06

1

Contents

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1.0 Introduction ..................................................................................................................................................... 3

2.0 Unpacking ........................................................................................................................................................ 3

3.0 Installation ........................................................................................................................................................ 4

3.1 Mounting the Electronic Enclosure ................................................................................................... 4

3.2 Electrical Installation ........................................................................................................................ 6

3.2.1 Terminal Board Signal Description........................................................................................ 7

3.2.2 Field Wiring Instructions (Optional 4-20 mA Output) .......................................................... 8

3.3 pH Adjustment Pump(s) .................................................................................................................... 9

3.4 Keypad and Display .......................................................................................................................... 9

4.0 Operation........................................................................................................................................................ 10

4.1 Default Settings ............................................................................................................................... 10

4.1.1 Proportional Mode ............................................................................................................... 11

4.1.2 On/Off Mode ........................................................................................................................ 12

4.2 Alarms ............................................................................................................................................. 13

4.3 Calibration (Viewing Last Calibration Data) ..................................................................................15

4.4 New Calibration .............................................................................................................................. 15

4.5 Pump Timers and Solenoid Valve Control ..................................................................................... 17

4.6 Advanced Menu .............................................................................................................................. 20

5.0 Maintenance .................................................................................................................................................... 21

5.1 pH Electrode and Cable .................................................................................................................. 21

6.0 Troubleshooting .............................................................................................................................................. 21

6.1 Error Messages ................................................................................................................................ 22

7.0 DP5000 Specifications.................................................................................................................................... 23

8.0 Program Log ................................................................................................................................................... 25

9.0 Parts List ....................................................................................................................................................... 26

10.0 Exploded View ............................................................................................................................................... 27

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1.0 Introduction

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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 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’ (inflection point) for the control profiles of the
acid or alkali pumps for finer control. The DP5000 features continuous non-volatile memory back-up, voltage selection,
pre-amplifier outputs, flow and level switch inputs as standard. 4-20 mA recorder output is optional.

2.0 Unpacking

Your carton will contain the items shown in Figure 1. Please notify the carrier immediately if there are any signs of damage
to the controller or its parts. Contact your LMI Distributor if any of the parts are missing.

There is a number label on the inside cover of the unit; for easy reference, you should note the model and serial numbers
on the front cover of this instruction manual.

Quick Reference Guide

DP5000 pH Controller

User Manual

Figure 1: Unpacking Items

3

3.0 Installation

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Pre-Installation

!

Be sure that the unit has a plug and voltage code compatible with the power source that you intend to use.

CAUTION

Environment

The housing is corrosion and spray resistant but should not be subjected to excessive spray or ambient temperature over
122° F (50° C). Never immerse the unit.

Installation

The DP5000 Controller should be mounted on a solid, stable surface. pH adjustment pumps should be installed following
the manufacturer’s recommendations. For installations requiring longer cables, consult your distributor. The electrode
installation will vary, depending on the process used. In general, the temperature electrode and pH electrode should be
mounted together, and placed far enough downstream from the source of pH adjusting solution that sufficient mixing may
occur, but close enough to eliminate hydraulic lag time of response. Refer to the typical installation diagrams on the
following page.

3.1 Mounting the Electronic Enclosure

The DP5000 control module is supplied with integral wall mounting flanges. It should be hung with the display at eye level,
on a vibration-free structure, in a location where liquids will not be splashed on it. All four (4) top-mounting holes should
be used for structural stability. The control module requires the following clearances:

Figure 2: Minimum Clearances

4

Figure 3A: Typical In-Line Installation

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Figure 3B: Typical Batch Installation

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3.2 Electrical Installation

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Electrical Connections

!

CAUTION

Electrical installation of the DP5000 Series pH Controllers consists of plugging the control module into a proper line outlet.
Based on model number, the following voltages and receptacles are required:

To reduce the risk of electrical shock, the control or metering pump must be plugged into a ground outlet with

ratings conforming to the data on the control panel. It must be connected to a good ground. DO NOT USE

ADAPTERS! All wiring must conform to local electrical codes.

DP5000-1A DP5000-3A DP5000-6A DP5000-01A
DP5000-1B, DP5000-3B DP5000-6B DP5000-01B

115 V, 60 Hz 230 V, 50 Hz, 230 V, 50 Hz 115 V, 60 Hz
USA Cord DIN Cord AUS/NZ Cord No Cord

DP5000-2A DP5000-5A DP5000-7A DP5000-02A
DP5000-2B DP5000-5B DP5000-7B DP5000-02B

230 V, 60Hz 230 V, 50 Hz 230 V, 50Hz 230 V, 50/60Hz
USA Cord UK Cord SWISS Cord No Cord

Connect the pH adjustment pump(s) to the terminal strip for ‘ON/OFF’ control (connect to receptacles directly for 115 V
models) or to cables for ‘PROPORTIONAL’ control. Connect the pH electrode to the BNC connector on the right side of
the control module. Take care not to twist or strain the wires. If equipped, connect the ATC cable (1000 Ω at 32° F
[0° C]) through the cable gland below the BNC connector to the terminal strip. You may optionally connect an alarm,
solenoid, flow switch and low level switch. You may also connect the mA connections (with the option fitted). The ± 5
V supply for electrode pre-amplification is also accessed on the terminal strip. There is a 500 Ω maximum resistance
for 4-20 mA option (refer to Figures 4 and 5).

(Either option is available)

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Figure 4: Electrode and Pump Connections

Voltage Selection Switch

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Fuse #2

Fuse #1

See Detail A

TB1 TB3

Live

10

120V/230V

9

8

7

Neutral

6

5

4

3

2

1

Solenoid

Alarm 1

Alarm 2

Pump A

Pump B

NC

NO

NC

NO

NC

NO

NO

NO

115V

TB2

Detail A

8

7

6

5

4

3

2

1

Output
Pump B

Output
Pump A

Output
Fault

Remote
off

TB4

Tem p

Tem p

+ 5V

- 5V

GND

GND

12

11

10

9

8

7

6

5

4

3

2

1

GND

Output

4-20mA

PreAmp

Power

Tem p
Input

Low Level

Flow

12

11

10

9

8

7

6

5

4

3

2

1

Figure 5: Terminal Strip

3.2.1 Terminal Board Signal Description

Terminal blocks are TB1-TB4 from left to right, and Pin 1 is at the bottom of each terminal block.

TB1 Terminal Strip

TB1 Pin 1-Pin 3 ............. Earth connection (one for input power connection)

TB1 Pin 4-Pin 9 ............. Neutral power connection (one for input power connection)

TB1 Pin 10 .................... AC Mains live input

TB2 Terminal Strip

TB2 Pin 1 ...................... Form A contact closed when Pump B (base) is ON

TB2 Pin 2 ...................... Form A contact closed when Pump A (acid) is ON

TB2 Pin 3-4 ................... Form C contact activated, (if programmed) when pH is within programmed limits

(solenoid pump)

TB2 Pin 5-6 ................... Form C contact activated when Alarm Setpoint 2 exceeded (powered output contacts)

TB2 Pin 7-8 ................... Form C contact activated when Alarm Setpoint 1 exceeded (powered output contacts)

TB3 Terminal Strip

TB3 Pin 1-2 ................... Opto isolated input - low or short stops pumps (OFF on display)(Remote OFF)

TB3 Pin 3-4 ................... Opto isolated output - low when alarm condition exists

TB3 Pin 5-6 ................... Opto isolated output - pulse train to drive Pump A

TB3 Pin 7-8 ................... Opto isolated output - pulse train to drive Pump B

TB3 Pin 9-10 ................. Spare, not programmed

TB3 Pin 11-12 ............... Spare, not programmed

TB4 Terminal Strip

TB4 Pin 1-2 ................... Opto isolated input - flow switch input (add jumper if no flow switch is used)

TB4 Pin 3-4 ................... Opto isolated input - level switch input (add jumper if no level switch is used)

TB4 Pin 5-6 ................... Spare, not programmed

TB4 Pin 7-8 ................... Temperature input (from platinum RTD probe) (polarity sensitive)

TB4 Pin 9-10 ................. Power voltage source for preamp

TB4 Pin 11-12 ............... 4-20 mA output proportional to pH (programmable limits) (optional) (polarity sensitive)

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3.2.2 Field Wiring Instructions

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Typical US field installation would include a 6 ft (2 m) AC cord wired and two (2) 1 ft (30 cm) AC receptacles (‘ON/OFF’
mode) or two (2) 10 ft (3 m) pump drive cables (‘PROPORTIONAL’ mode) installed. A BNC receptacle would be installed
for the pH probe.

Connect the two (2) pumps appropriately. Install the probe, run the cable back to the controller and attach to BNC receptacle.
If the probe is farther than 25 ft (7.6 m) from the controller, a pre-amp may be desirable to reduce noise effects. If this is
the case, run +5 V/-5 V as required by your preamp. Current draw must not be greater than 10 mA.

If a flow switch and/or low-level tank switch is available, run wires to the controller - entering through one of the spare
cable ports. Remove the appropriate jumper(s) and attach the external wires. Polarity does not matter. Wire size #20-22
is adequate.

Alarm relays 1 and 2 are provided to signal an out of tolerance condition externally. These are Form C contacts, providing
a common, a normally open and a normally closed connection.These terminals provide power output.

A solenoid drive relay is provided that can be connected to drain a tank when the pH is within programmed limits. This
form C contact provides a common, a normally open and a normally closed connection. A delay can be programmed after
initially entering this programmed zone, to allow conditions to settle within the tank. The duration of solenoid ON time
is separately programmable. Wire size #16-18 is adequate. These terminals provide output power (main voltage).

The optional 4-20 mA PCB provides a fully programmable 4-20 mA output based on the pH readings. The optional PCB
plugs into the back of the computer pc board, as shown in Figure 6.

Figure 6: Circuit Board

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3.3 pH Adjustment Pump(s)

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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
efficient 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 A9, A7, B9, B7, C9, C7, E7 or L7 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 efficient 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.

3.4 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).

Figure 7: Keypad

Keys:

This key is used to set up the control profile for the acid dosing pump. (Holding the key for five (5) seconds
will allow priming of Pump A) (Factory setting 90 SPM).

This key is used to set up the control profile for the base (alkali) dosing pump. (Holding key for five (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.

This key is used to program ‘run times’ for Pumps A and B, ‘delay times’ 1 and 2 for actuating and controlling
a solenoid valve (when programmed ‘ON’ in the advanced features menu). This key also allows setting of
the ‘manual temperature’ and the controller response rate ∆ pH. If pump run time is over 11:01 hours, the
run time is disabled. The pump will not be stopped and will run continuously.

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This key when pressed will display details of the last successful electrode calibration. (Holding this key for

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five (5) seconds will allow entry into a new calibration procedure [single or two point]).

Pressing this key will cause the display to alternate showing various settings. (Holding the key for five (5)
seconds will allow entry to the ‘advanced features’ menu).

This key is used for starting and stopping (run or edit) the pumps and changing set points in the controller.
It changes the mode of the controller from ‘RUN’ to ‘OFF.’

These keys are used to change values on the display.

Simultaneously pressing these two (2) keys will lock the keypad to prevent casual tampering.

Pressing them a second time will unlock the keypad. (Wait five (5) seconds between locking and
unlocking).

4.0 OPERATION

4.1 Default Settings

In the default mode, as shipped from the factory without any extended features programmed in the ‘menu’, the controller
is set to operate two (2) dosing pumps towards a single desired pH region as defined by the set points. It will do this in one
of two ways, ‘ON/OFF’ or ‘PROPORTIONAL,’ shown graphically below:

Figure 8: ON/OFF Control Figure 9: Proportional

When the unit is plugged in, the computer powers up and the display illuminates. The display flashes the pH reading and

‘OFF’. This indicates the pumps will not operate and the unit is in the ‘OFF’ mode. When the

controller starts and switches into the ‘RUN’ mode.

Example: (Proportional Controller)

This display shows a pH value of 12.0. Pump A is
flashing indicating that the acid pump is in
operation. The pump will stop pumping after 46:35
minutes if set point is not reached.

For two (2) seconds in every eight (8) seconds the
display shows pump speed in pulses/minute. The
pulses/minute displayed relates to the pump that is in
operation.

10

OUTOFRANGE

key is pressed the

When the pH value exceeds the programmed pH

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alarm point (12.5), the ‘ALARM’ flashes and the
alarm relay is activated.

Throughout this manual, the term ‘pulse’ is used to describe the mechanical stroke of the pump, as strokes per minute

(SPM).

4.1.1 Proportional Mode

The unit is shipped preset at the factory for the ‘PROPORTIONAL’ or ‘ON/OFF’ mode. To change the unit to the opposite
mode see ‘Advanced Menu List,’ Option 2, on page 20.

Controller must be in ‘OFF’ mode to program changes.

Figure 10: Pump A Control Profile

Pressing

switches the mode back and forth from RUN’

to ‘OFF’. The pH set points and pump speed (pulses/min) can
be changed only in the ‘OFF’ mode.

(1) ...... Press

(2) ...... Press to the increase/decrease the pH value of Set

Point 1 for turning on ‘Pump A’.

(3) ...... Press

(4) ...... Press

again.

to increase/decrease pump speed (pulse/min) for

set point 1.

(5) ...... Press again.

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(6) ...... Press to increase/decrease the pH for Set Point 2.

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(7) ...... Press again.

(8) ...... Press

to increase/decrease pump speed (pulse/min)

for Set Point 2.

‘Pump B’ (Base Pump) is programmed in a similar way.

Set points 1 and 2 must be separated by 0.5 pH minimum. If ‘Point 3’ is selected in the Advanced Features Menu,

the user will be prompted to enter a pH value for Set Point 3 and a Pump Speed at Set Point 3. Set points 1 and 3,

2 and 3 must be separated by 0.1 pH minimum.

4.1.2 On / Off Mode

Pump A Control Profile

Controller must be in ‘OFF’ mode to program changes.

• Hysteresis values can be set as low as 0.1 pH

• Lowest setpoint value for pump B is 1pH

• Highest setpoint value for pump B is 12 pH

• Lowest setpoint value for pump A is 2 pH

• Highest setpoint value for pump A is 13 pH

For ‘ON/OFF’ controllers with relay outputs (instead of pulse outputs) each pump is programmed as follows:

(1) ...... Press ....to display Set Point.

(2) ...... Press

(3) ...... Press

(4) ...... Press

relay. In this example, ‘Pump A’ will turn on at a pH of

to increase/decrease pH Set Point.

to save programmed Set Point.

to program ∆ pH (Hysteresis) period for

8.0 (set point + ∆ pH). ‘Pump A’ will turn off when pH
drops to 7.5.

‘Pump B’ (Base Pump) is programmed in a similar way.

12

In this example, ‘Pump B’ will turn on at a pH of 3.5 (set point - ∆ pH) and will turn off when pH reaches 4.0.

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It is highly recommended that the hysteresis (pump off function) be used to prevent relay chatter.

The function of the hysteresis is to prevent pump relay chattering. It operates by allowing the pump to be turned on when
the control point plus (or minus) the hysteresis value has been met, but does not allow the pump to turn off until the control
point has been met. The chosen value will be used for both upper and lower set points.

The hysteresis, or dead band, designates how many pH units beyond set point the pump runs before turning off. Any value
from 0 to 14.00 is acceptable. If use of this function is undesirable, set it to 0.

Example: If the lower set point is pH 4.0 and the hysteresis has been set at 0.50, a falling pH will cause the pump to activate
at pH 3.50 and it will run until reaching set point (4.0).

4.2 Alarms

Controller must be in ‘OFF’ mode to program change Set Points.

(1) ...... Press to display Alarm data.

(2) ...... Press

(Pump B)

(3) ...... Press

Alarm Point 2.

(4) ...... Press

(Pump A).

to program Alarm Point 1 (low pH).

to save Alarm Point 1 value and to move to

to program Alarm Point 2 (high pH).

(5) ...... Press to save Alarm Point 2 value and to move to

Alarm Hysteresis.

(6) ...... Press

to program Alarm Hysteresis.

This is the point where the alarm turns off.

13

If the 4-20 mA option board is installed, the following screens

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will appear. If these do not appear and the 4-20 mA PCB is
installed, go to Section 4.6, Advanced Menu, and program
option “7” to “1” and option “6” to “1”.

(7) ...... Press

(8) ...... Press

(9) ...... Press

to display current mA output value.

again to program the 4-20 mA output.

to select the pH value for Point 1 mA

output. Default is 4 mA = 0 pH, 20 mA =14 pH.

(10) .... Press again. Press

Point 1.

to select the mA value at

(11) .... Press

value for Point 2 mA output.

(12) .... Press

value at Point 2.

again. Press to select the pH

again. Press to select the mA

14

4.3 Calibration (Viewing Last Calibration Data)

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Press the key once.

CALIBRATE will be visible and the ‘mV/pH’ and ‘%’ (slope) of
the previous calibration will be displayed. The display will alternate
between ‘mV/pH’ and ‘°

C.’

‘2 Point’ indicates that the previous calibration was a two-point
calibration.

‘1 Point’ indicates that the previous calibration was a one-point
calibration.

4.4 New Calibration

For two-point calibration, the default settings are Buffer 1 = 7.00 pH and Buffer 2 = 10.00 pH but these values may be
changed.

Because it is not always possible to transfer the temperature probe from the process to the pH buffer, automatic
temperature probe detection can be switched off in pH calibration mode.

The calibration parameters (temperature, ATC [automatic temperature compensation] or manual, buffer pH and one or two
point calibration) of the previous calibration are the initial values for the current calibration.

If the LMI temperature cable and probe are connected, then the computer automatically selects and uses this ATC

(automatic temperature compensation) during calibration. If no temperature probe is connected, then ‘MANUAL’

will be selected during calibration. You must manually measure the temperature of the process being controlled and

enter that value here.

The unit must be placed in the ‘OFF’ mode. The unit cannot be calibrated in the ‘Run’ mode.

Calibration (e.g., 2 Point)

(1) ......

+ 5 seconds

Hold the ‘CALIBRATE’ key down for five (5) seconds.
‘CALIBRATE’ will start flashing.

15

(2) ...... Press again.

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‘2 Point’ will start flashing. Use the

keys to

toggle between ‘1 Point’ and ‘2 Point.’

(3) ...... Press

flashing. Use the

again. ‘ATC’ (or ‘MANUAL’) will start

keys to toggle between ‘ATC’

and ‘MANUAL’ temperature.

(4) ...... Press

again. Use keys to program actual

temperature of buffer.

It is not possible to program temperature if ‘ATC’ is selected.

Automatic temperature probe detection can be over-ridden in pH calibration mode. If the ATC probe is not connected,

the controller will not detect it and only the ‘MANUAL’ temperature option above will be displayed.

(5) ...... Press again. The ‘Buffer 1’ value will start

flashing. Use

keys to program ‘Buffer 1’ pH

(or leave at 7.0).

(6) ...... Press again. The symbol will prompt you to

put the probe in ‘Buffer 1’. Wait for the mV value to
settle.

(7) ...... Press

again. This will accept the first calibration

value and will display the ‘Buffer 2’ pH. Use

keys to program ‘Buffer 2’ (or leave) as desired.

16

(8) ...... Press again and the symbol will prompt you to

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put the probe in ‘Buffer 2’. Wait for the mV value to
settle.

(9) ...... Press

again. This will accept the second

calibration value and will display the ‘mV/pH’ (and ‘%’
Slope) result of the calibration.

(10) .... Press

again to accept this calibration and exit

calibration mode. Press any other key to abort calibration.

For a single-point calibration, only one (1) buffer is used. The theoretical value for pH 7.00 is used to complete the

Calibration Curve.

If the calibration is unsuccessful (slope < 70% or offset > ± 30 mV)
and ‘ERROR CALIBRATE’ and ‘E7’ are displayed; the calibration
should be repeated or else the controller reverts to using the ‘last
successful’ calibration performed.

A slope of less than 70% indicates a dirty/faulty probe or contaminated buffer.

4.5 Pump Timers and Solenoid Valve Control Timers

It is not possible to change timer values while in ‘RUN’ mode. Unit must be in the ‘OFF’ mode to change values and
settings.

Pump Run Time:

This timer is set to the maximum time the pump can be on. If the timer is set to over 11:01 hours, the pump will run
continuously.

This timer is started when a pump is on and the pH value is outside the set points. The controller will stop the pumps when
the time reaches ‘0’ and activate ‘ALARMS.’ The run time is reset each time the pH enters the desired set point region.

Solenoid Delay Pump Valve Time:

The Solenoid Valve Relay output may be activated when the pH is within the set points for the time specified by ‘Delay

1.’ This may be used for system integration and for emptying a batch tank etc.

The ‘Delay 1’ Timer defines the period to allow pH and system parameters to settle.

The ‘Delay 2’ Timer (ON time) defines how long the valve will stay open. When these Delay Timers are active, pump
dosing cannot take place but the DP5000 will monitor the pH. The ‘Delay 2’ timer starts when the outputs are activated.
If the pH drifts outside of the set point and range, the solenoid relay will be deactivated.

If a ‘Delay 2’ time goes below one hour, then the display will change to ‘minutes : seconds’ from ‘hours : minutes.’

17

Setting Timers:

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The unit must be in the ‘OFF’ (edit) mode to change the timer settings.

For proportional mode pump run time must be set above 11 HR 01 Min to ensure continuous operation.

(1) ...... Press the key to view the run time for ‘Pump A’.

(2) ...... Use

to adjust to desired maximum run time.

The ‘hr : min’ will change to ‘min : sec’ automatically as the run time is reduced below one (1) hour.

(3) ...... Press the key to advance to run time for ‘Pump B’.

(4) ...... Use

to adjust to desired maximum run time.

The ‘hr : min’ will change to ‘min : sec’ automatically as the run time is reduced below one (1) hour.

Delay Timers are factory set in the deactivated mode. The ‘Delay 1 and Delay 2’ Timers are activated/deactivated

in the ‘Advanced Features Menu.’ These screens will not display when the delay option is deactivated.

Solenoid Valve Control:

(5) ...... Press the

activated). ‘Delay 1’ is the wait time after pH enters the
desired region, before the Solenoid is activated.

(6) ...... Press the

activated). ‘Delay 2’ is the Solenoid ‘ON’ time.

If the pH should go out of the desired range during ‘Delay1’ or ‘Delay 2’, the Solenoid cycle will terminate.

It will start again from zero when pH re-enters the desired region. If pH remains in the desired region, the controller

will enter ‘OFF’ mode at the end of the Solenoid ‘ON’ time. The controller turns ‘ON’, again in one minute and the

cycle repeats.

18

key to advance to ‘Delay 1’ time (if

key to advance to ‘Delay 2’ time (if

(7) ...... Press key to advance to ‘Response Rate’. This is

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programmed in ∆ pH units.

The smoothing of the input signal is determined by delta
(pH) time. The ‘Response Rate’ is the time that the
computer display takes before it updates the pH readings.

The following values can be programmed (min : sec):

00 : 01 00 : 10 00 : 20 00 : 30. . . . . . 04 : 00 (In increments of 10 seconds)

When 00 : 01 is programmed the controller responds to a change in input in one (1) second.

If 00 : 10 is selected the controller responds to a change in input in ten (10) seconds. (i.e., the value displayed is the average
of the 10 previous 1 second readings.)

Examples: The sampling time (delta) is 00 : 10 and the current reading is 2.00 pH.

When the pH input is increased instantaneously to 12.00 pH, the display will respond as follows:

Seconds 0 1 234567891011

pH 2345678910111212

If the sampling was 00 : 01 seconds, the response would be:

Seconds 0 1 234567891011
pH 21212121212121212121212

Press the key to advance to set temperature.

This setting is relevant when no temperature probe
(1000 Ω platinum RTD) is connected.

Display Key:

While in the Run Mode the

key can be pressed once to display current parameters. Each screen will come up for

three (3) seconds and then returns to pH display or System Run automatically (screens shown below are: mV, °C, and mA).

+ 3 Seconds

+ 3 Seconds

19

Similarly, the Pump Control Points can be displayed while in the ‘RUN’ Mode by pressing the ‘Pump A’ or ‘Pump B’ keys

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once.

Press

and the following screens display:

+3 Seconds

4.6 Advanced Menu:

Holding the key for five (5) seconds accesses the ‘Advanced Features’ Menu, and allows these settings to be

changed.

Press the ‘DISPLAY/MENU’ key for five (5) seconds while the controller is in the ‘EDIT’or ‘OFF’ mode.

The first item displayed is the software revision. Pressing ‘Display/Menu’ again cycles to the first option. The first number

is the option. The second is the setting. Use the

Option Setting

1 1 Control returns to Run 60 seconds after last keypress

0 Run/Edit key is On/Off

to change the setting.

21On/Off Control

0 Proportional Control (and On/Off)
2 Proportional Control

3 1 Point 3 Programming Enabled

0 Point 3 Programming Disabled (Two point only)

4 1 Solenoid programmed to switch on after programmed time‘DELAY 1’ and to switch Off

after programmed time ‘DELAY 2’

0 Solenoid Disabled

5 1 (NA)

0

6 1 mA Enabled - Option Board must be fitted

0 mA Disabled

7 1 Allows editing of #5 & #6

0 Lockout #5 and #6

The Option Board (37830) is required for Option 6.

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5.0 Maintenance

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5.1 pH Electrode and Cable

The most frequently replaced part is the pH electrode (not supplied with controller), which will deteriorate with age.
Refillable electrodes should be checked for level frequently, and replenished with filling solution as necessary. An electrode
may also fail because of:

• aging (slow response to changing pH)

• coatings over the glass bulb (slow response to changing pH)

• abrasion of the glass bulb (shift in calibration)

• chemical attack

• breakage

If you experience instability or lack of response, check the electrode, replace if necessary and recalibrate. Follow
manufacturer's recommendation for cleaning the electrode.

Take care not to damage input cables, or allow the connections to get wet.

6.0 Troubleshooting

Troubleshooting and repair of the malfunctioning unit should only be attempted by qualified personnel using caution to
ensure safety and limit unnecessary damage.

Should an error or alarm condition occur, the controller will alert the operator by flashing an ‘ERROR MESSAGE’. These
messages are depicted on the following page with a brief explanation.

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6.1 Error Messages

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Turn system off to clear error message.

E 1

E 2

E 3

E1 = LOW LEVEL SWITCH

E2 = FLOW SWITCH

E3 = ALARM 1: LOW pH (PUMP B)

E 4

E 5

E 6

E 7

E4 = ALARM 2: HIGH pH (PUMP A)

E5 = Pump B ‘LOCKOUT

E6 = Pump A ‘LOCKOUT

E7 = CALIBRATION ERROR

Probe is out of Manufacturer’s Limits

E9 = FAULTY/DISCONNECTED PROBE

E 9

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7.0 DP5000 Specifications

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Power
Requirements

115 VAC ±15%, 60 Hz
230 VAC ±15%, 50 Hz
Voltage input selectable via a selector switch located on the I/O PCB.

Inputs

Outputs

Output Type:

Keypad

Material:

Actuation Force:

Travel:

Termination Connector:

Temperature Input

Probe:

Circuit Accuracy:

Temperature Display:

Temperature Resolution:

pH Probe Input

Accuracy:

Resolution:

Input pH Range:
Input Impedance Differential:
Input Impedance Common:

ESD Protection:

Flow Switch, Remote ON/OFF, Spares. All low voltage inputs active low, i.e., the
active state is when the switch is closed. The switch must be capable of switching 2
mA at ± 15 VDC.

Pulse Pump A and B, Alarm.
All low voltage outputs capable of switching 2 mA at + 24 VDC. The pulse output
frequency range will be 0-100 per minute. The pulse output active low. The pulse
width 100 ms in the active (low) state.

Opto-Isolated NPN transistor open collector configuration.

Nine key membrane keypad with tactile response.
(The switches are multiplexed 3 x 3.)
Polyester with a hard coat finish

2.6 N to 3.3 N

0.65 mm 6-way gold plated Berg clincher type 65801-035

The temperature input interfaces to a platinum 1000 ohm RTD probe.
PT1000 (Platinum, 1000 Ω base resistance)
± 0.9° F (± 0.5° C)
32° F to 212° F (0° C to100° C)
± 1.8° F (± 1° C)

± 0.02 pH (500M Ω probe ambient cycle 32° F to 113° F [0° C to 45° C])

0.01 pH
0-14 pH
1013 Ω
1016 Ω
700 V

Relays

Alarm Relays (2):

Solenoid Valve Relay (1):

Current/Voltage Rating:

Contact Type:

Pump ON/OFF Relay (2)

(ON/OFF CONTROL)

Fuse:

LCD Display

Operating Voltage:

Operating Temperature

Viewing Area:

Backlight:

Memory Backup

Data Retention No Power:

Fuse protected
Electromechanical
115/230 VAC, 10 A/6 A
10A, 115 VAC or 6A, 230 VAC
Normally open and normally closed contacts
(FORM C) Change over relay
115 V/230 VAC, 10 A/6 A (NO)
ON/OFF Relays are Fuse Protected
(FORM C). Normally open relay
4 A, 250 VAC time delay (Anti-surge)

5 V
32° F to +122° F (0° C to +50° C)

1.2 x 1.8 inches (30 x 46 mm)
An 8 emitter (dual LED type), double row, reflective backed, backlight module will be
used. The light output color and reflective backing color will be high performance green.

EEPROM
10 year minimum

23

Pre-amplifier

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Output Voltages

Voltage:

Output Voltage Tolerance:

Current Output:

Optional Output

4-20 mA Load:

Accuracy:

Control Outputs

(Pump A / Pump B)

(Proportional Control)

Fault:

Control Inputs

Remote ON / OFF:

Flow Switch:

Low Level Input:

Aux (spare):

± 5 V
± 5% maximum
± 10 mA maximum

500 Ω maximum resistance
± 0.2 mA - The 4-20 mA isolated

Opto-Isolated Open Collector (2 mA)

Opto-Isolated Open Collector (2 mA)

Opto-Isolated (2 mA)
Opto-Isolated (2 mA)
Opto-Isolated (2 mA)
Opto-Isolated (2 mA)

Environmental

Operating Temperature:

Enclosure:

Mechanical

Control Board:

Terminal/Power Board:

Option Board:

Printed Circuit Boards conformally coated
32° F to 122° F (0° C to 50° C)
IEC IP65, NEMA 4X

Two printed circuit boards (3 if option installed)
(Microcontroller & Display) - Low Voltage
Transformer, fuses, terminal blocks, relays
(4-20 mA output ) - Low Voltage

24

8.0 Program Log

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For record keeping, a program log is provided below.

Proportional ON/OFF Proportional ON/OFF

Pt 1 Pt 2 Pt 1 Pt 2

Pump A Set Point 7.5 10.5 7.5
Pump A Pulses/Min 20 90 / / /
Pump B Set Point 6.5 2.5 6.5
Pump B Pulses/Min 30 65 / / /

Hysteresis 1 / / / / / / 0.5
Hysteresis 2 / / / / / / 0.5

Alarm 1 2.0 pH
Alarm 2 12.5 pH
Hysteresis 0.5 pH

Alarms

mA Response

Current Low 4.0 mA
Signal Low 0.0 pH
Current High 20.0 mA
Signal High 14.0 pH

Timers

Pump A On-Time 20:00 Min
Pump B On-Time 30:00 Min
Sampling Time 00:10 Min

Delay to Solenoid ON 5:00 Min

Solenoid On-Time 20:00 Min

Temperature 24o C

Calibration

Number of Points 2
Buffer Temperature Manual
Buffer Temperature 24
Buffer 1 7.0
Buffer 2 10.0

25

9.0 Parts List

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Key No. Part No. Description

1 34691 Housing, Machined
2 32186 Screw, 4-40 x .37
3 32187 Nut, 4-40 Flush
4 32209 Latch, Machined
5 34270 I/O Board Assembly
6 34716 Standoff, Self Adhesive
7 31632 Screw, #6 x .38
8 34329 BNC Cable Assembly

9 34330 Ribbon Cable Assembly
10 25957-1 Cord Clamp (PG-9) Clamp for female outlet power cord)
11 36810 Dowel
12 31571 Clamp, Cord (PG-9) Clamp for 4pin cable
13 34074 Gasket, Foam
14 34088 Cover, Utility Box
15 30588 Label LMI Logo
16 37524 Front Panel Assembly
17 31617 Cover, Liquitron™
18 32094 Label, Housing cover LMI
19 32211 Cap, .125 x .38
20 32352 O-Ring, Sponge
21 32395 Screw, Self-Tapping
22 34911 Cover, Fuse
23 35711 Cord, Power, 115V, NEMA 15-R - DP5000-XA (On/Off)

33636 4-Pin Cable - DP5000-XB (Proportional)
24 34930 Terminal Cover Label
25 34315 PCB Support
26 30749 Power Cord 115V - DP5000-1A/B

30751 Power Cord 220V US - DP5000-2A/B

30752 Power Cord DIN - DP5000-3A/B

34783 Cord Assembly UK - DP5000-5A/B

30754 Power Cord AUST - DP5000-6A/B

34784 Cord Assembly SWISS - DP5000-7A/B
27 37830 4-20mA Circuit Board Assembly
28 35712 Fuse, 4A Time Delay

26

10.0 Exploded View

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27

© 2006 LMI Milton Roy - All Rights Reserved

[e-mail]
www.novatech-usa.com
Tel: [phone] Fax: [phone]
Tel: [phone] Fax: [phone]

28

Printed in USA
Specifications subject to change without notice.

201 Ivyland Road

Ivyland, PA 18974 USA

TEL: [phone]

FAX: [phone]

www.lmipumps.com