Pulsafeeder MicroVision User manual

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MicroVision
MICROPROCESSOR –BASED
WATER TREATMENT
CONTROLLER
Installation Operation Manual

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Table of Contents
1. INTRODUCTION ...................................................................................................................... 4
2. MICROVISION FEATURES ....................................................................................................... 4
2.1 Toroidal Probe ..............................................................................................................................4
2.2 Output Relays................................................................................................................................5
2.3 Drum Levels..................................................................................................................................5
2.4 Flow Switch..................................................................................................................................5
2.5 4-20mA Output.............................................................................................................................6
2.6 Water Meter ..................................................................................................................................6
2.7 Alarm Relay..................................................................................................................................6
3. INSTALLATION ......................................................................................................................... 7
3.1 Opening The Enclosure.................................................................................................................7
3.2 Location ........................................................................................................................................8
3.3 Mounting Hardware......................................................................................................................8
3.4 Sensor Installation.........................................................................................................................9
3.5 Flow Sensor Switch ......................................................................................................................9
3.6 TYPICAL INSTALLATION......................................................................................................10
4. IMPORTANT SYMBOL INFORMATION ................................................................................. 10
5. ELECTRICAL WIRING ............................................................................................................ 11
5.1 RELAY BOARD CONNECTIONS...........................................................................................12
5.2 Conduit Models (Wiring High Voltage).....................................................................................12
5.3 LOW VOLTAGE CONNECTIONS ..........................................................................................13
5.4 Flow Switch Input.......................................................................................................................14
5.5 Sensor (probe) Connection Input................................................................................................14
5.6 Water Meter Input.......................................................................................................................14
5.7 Drum Level Input........................................................................................................................14
5.8 4-20mA Output...........................................................................................................................14
5.9 Alarm Relay................................................................................................................................14
6. FRONT PANEL DESCRIPTION ............................................................................................... 15
6.1 Keypad Operation.......................................................................................................................15
7. CONTROLLER PROGRAMMING.......................................................................................... 16
7.1 Menu Tree...................................................................................................................................16
7.2 Menu Navigation ........................................................................................................................17
7.3 Home screen................................................................................................................................17
7.4 Main Menu..................................................................................................................................17
7.5 Status Screen...............................................................................................................................18
7.6 Configure Menu..........................................................................................................................18
7.7 Date/Time Menu.........................................................................................................................19
7.8 HOA Outputs Menu....................................................................................................................19
7.9 Water Meter Menu......................................................................................................................20
7.10 Languages Menu.........................................................................................................................20
7.11 Drum Levels Menu .....................................................................................................................20
7.12 Display Dampener ......................................................................................................................21
7.13 Rising/Falling Setpoint Option ...................................................................................................21
7.14 Display Contrast Setting .............................................................................................................22
7.15 Password Setting.........................................................................................................................22
7.16 Troubleshoot Screen ...................................................................................................................23
7.17 Software Version ........................................................................................................................23
7.18 Factory Reset Function ...............................................................................................................24
7.19 Settings Menu .............................................................................................................................25

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7.20 Conductivity Menu .....................................................................................................................25
7.21 Inhibitor Menu............................................................................................................................26
7.22 Inhibitor - Inhibitor Feed Mode Menu........................................................................................27
7.23 Inhibitor - Inhibitor Feed Mode –Pulse Timer Menu.................................................................27
7.24 Inhibitor - Inhibitor Feed Mode –% Post Blowdown Menu ......................................................28
7.25 Inhibitor –Bio Tracking Menu...................................................................................................28
7.26 Biocide A or B Menu..................................................................................................................29
7.27 Biocide A or B –Days/Weeks Menu..........................................................................................30
8. Probe Calibration................................................................................................................ 31
9. Factory Defaults .................................................................................................................. 33
10. TROUBLESHOOTING GUIDE................................................................................................. 34
11. MAINTENANCE..................................................................................................................... 36
12. SPECIFICATIONS ................................................................................................................... 36
13. GLOSSARY ............................................................................................................................ 38
14. MOUNTING HOLE PATTERN (Footprint).............................................................................. 41
15. Factory Service Policy......................................................................................................... 42
16. Warranty ............................................................................................................................... 42

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1. INTRODUCTION
The MicroVision microprocessor based cooling tower controller has been designed to
monitor and control Total Dissolved Solids (TDS) in terms of electrical conductivity
measured in micro Siemens per centimeter (uS/cm). A set point of the desired
conductivity is entered into the controller through the front panel. As this limit is
exceeded, a bleed valve is opened via an onboard control relay. The system’s
water, with higher concentrations of TDS, is bled resulting in fresh make-up water
being added, reducing the concentration of TDS in the cooling system.
In addition to the bleed relay, MicroVision has three (3) other onboard control relays
assigned as follows:
Relay 1 - Bleed control
Relay 2 - Inhibitor timer (selectable)
Relay 3 - Biocide A
Relay 4 - Biocide B
2. MICROVISION FEATURES
2.1 Toroidal Probe
MicroVision uses a toroidal probe for conductivity measurement. The
measurement is made by passing an AC current through a toroidal drive coil,
which induces a current in the electrolyte solution (see Fig.1). This induced
current in turn, induces a current in a second toroidal coil, called the pick-up
toroid. The amount of current induced in the pick-up toroid is proportional to
the solution conductivity.

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Input AC
voltage
Sample
Current
field
Induced current dependent
on the conductivity of the
sample
Fig. 1
The main advantage of toroidal conductivity is that the toroidal coils are not in
contact with the solution. They are encased in a polymeric material or are external to
a flow through cell.
2.2 Output Relays
The control of the four HANDS –OFF –AUTO (HOA) output relays can be controlled
using the HOA menu.
RELAY STATUS
LED COLOR
ON (FORCED ON FOR 5 MIN.)
AMBER
OFF
RED
AUTOMATIC ‘ON’
GREEN
AUTOMATIC ‘OFF’
OFF
2.3 Drum Levels
Three (3) onboard dry contact inputs serve as Drum Level inputs. When a low level is
detected (switch closure), the unit will go into an Alarm state and the low drum’s
identity will be displayed on the screen.
2.4 Flow Switch
MicroVision has a dry contact flow switch input that will de-activate all of the control
output relays upon a no-flow indication. An Alarm condition will be indicated and
“No Flow” will be displayed. This input is active closed:
Open = no flow; closed = flow.

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If a flow switch input or other alarm condition exists, the four (4) LED’s will flash until
the alarm condition is cleared.
2.5 4-20mA Output
Connect your 4-20mA equipment to J8 (Fig. 7) pins + and -. The 4-20mA output uses
24VDC as a supply voltage. See the “Conductivity Menu” section (Page 24) for
setting up and calibrating the 4-20mA output.
2.6 Water Meter
MicroVision has a dedicated water meter that is capable of reading a dry contact or
Hall effect type water meter. Through programming this input can be used to feed
inhibitor as well as totalizing water consumption.
2.7 Alarm Relay
MicroVision has a dedicated dry contact relay that can be used to interface with
process control equipment or visual indicators. This relay is un-powered.

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3. INSTALLATION
Input power cord must be disconnected from power source prior to opening the
product’s enclosure.
3.1 Opening The Enclosure1
Loosen the four (4) screws on the front of the controller and carefully swing the top of the
case to the right (Fig. 2).
J10
J4
J5
J8
J3 J2
+5V
BLK
W METER
ALARM
ORG
BRN RED
DRUM LEVEL
INHIB
BIO A
BIO B
FLOW
HINGE
BOTTOM HALF TOP HALF
(SWINGS OPEN
TO THE RIGHT)
4-20mA
BLEED
INHIB BIO A BIO B SUPPLY
BLEED
INHIB BIO A BIO B 5A
F2
5A
F1
HOT RET
HOT
RET
HOT RET HOT RET HOT RET HOT RET PL2 PL3 PL4 PL5
HOT
no
nc
Fig. 2
1
Trained service personnel are required for all electrical connections. This product does not contain operator
serviceable parts.

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3.2 Location
Select a mounting location convenient to grounded electrical and plumbing
connections. It is recommended that you mount the controller on a wall or other vertical
surface with adequate lighting at a comfortable level. A mounting-hole template is
supplied with your controller. Installation should comply with all national, state, and local
codes.
AVOID LOCATIONS WHERE THE CONTROLLER WOULD BE SUBJECTED TO EXTREME COLD
OR HEAT {LESS THAN 0°F (-17,8°C) OR GREATER THAN 122°F (50°C)}, DIRECT
SUNLIGHT,VIBRATION,VAPORS,LIQUID SPILLS,OR EMI (ELECTROMAGNET
INTERFERENCE;E.G., STRONG RADIO TRANSMISSION AND ELECTRIC MOTORS.)
SAFETY PROTECTION PROVIDED BY THE EQUIPMENT MAY BE IMPARED IF THE
EQUIPMENT IS USED IN A MANNER NOT SPECIFIED BY THE MANUFACTURER.THIS
CONTROLLER IS INTENDED FOR INDOOR USE ONLY.
MOUNTING HOLES
.17 in. (4,4 mm) DIA.
MOUNTING HOLES
.17 in. (4,4 mm) DIA.
BLEED
INHIB BIO A BIO B SUPPLY
BLEED
INHIB BIO A BIO B 5A
F2
5A
F1
HOT RET
HOT
RET
HOT RET HOT RET HOT RET HOT RET PL2 PL3 PL4 PL5
HOT
no
nc
Fig.
3
Mount the bottom half of the controller using the four (4) holes provided (Fig. 3).
3.3 Mounting Hardware
For panel mounts without threaded inserts, four number 8 self taping screws are the
minimum recommendation.
For panel mounts with threaded inserts, four 8-32 screws are the minimum

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recommendation.
Panel mount hardware should support 25lbs. For hole locations, see the mounting hole
pattern (Fig. 9) found on the page 39 of manual.
3.4 Sensor Installation
The controller is supplied with a temperature compensated toroidal conductivity sensor
(probe). Install the sensor at some point in your process where chemical and water are
thoroughly mixed. The probe should also be located in a position where adequate flow is
going around and through the probe (Fig. 4) so that the controller will be able to display
a good measurement.
Fig. 4
3.5 Flow Sensor Switch
If your controller is provided with a flow switch, install the flow switch so that flow
enters into the bottom of the flow switch tee, and out of the side of the tee. The flow
switch must always be installed in a vertical position so that the sensor wire is coming
out of the top, and the internal (red) flow shuttle is able to rise when there is flow and
drop when there is no flow. The flow switch is activated when 1 GPM (3,8 LPM) is
going through it, and is deactivated when the flow drops below 1 GPM (3,8 LPM).

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3.6 TYPICAL INSTALLATION
MicroVision
Bleed
Feed
Biocide A
Biocide B
DISPLAY
SCREEN
Fig. 5
4. IMPORTANT SYMBOL INFORMATION
Warning indicates a condition that could cause damage to both
the equipment and the personnel operating it. Pay close attention
to any warning.
Primary Supply Ground must be connected to earth ground for safe
operation of your controller.
Chassis Ground –Connect your equipment’s ground wire here for
safe operation of your external devices.