ADVANTAGE CONTROLS MegaTronXS Controller Installation Guide

ADVANTAGE CONTROLS MegaTronXS Controller

MegaTronXS Controller Overview

The MegaTronXS microprocessor-based controller provides control functions for recirculating water treatment systems (e.g., cooling tower and boiler). It is programmed using a front panel keypad and can be configured for a customized control system based on the controller model number.

Specifications

Setup & Operation Quick Guide

1. Complete all installation steps before startup; verify all controlled devices (pumps, solenoid valves, etc.) are operational and connected to the controller.
2. Open the isolation valves to allow water to pass through the sample stream assembly.
3. Verify probes are installed per the electrode installation guidance for your system (cooling tower or boiler) and ensure required flow conditions are met (e.g., cooling tower sample line flow rate 3–10 gpm; systems with a flow switch require 2–3 gpm).
4. Startup: review the controller menus/options using the controller keys.
5. Calibration (as needed): from the CALIBRATION menu select the target measurement (e.g., SYSTEM COND, SYSTEM PH, SYSTEM ORP), enter corrected values, and press ENTER to log.
6. In RUN mode, view parameters; no settings can be entered or changed in RUN mode. To force an updated reading on timed sampling/sample & hold systems, press the #2 key while in the RUN screen.

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Troubleshooting

• Calibration will not complete / electrode appears clean: If an electrode appears clean but the unit still cannot be calibrated, use the more aggressive conductivity cleaning approach (mild acid solution for deposits; sand electrode surface with 200 grit or finer; avoid finger wiping that can foul carbon tips). Recheck calibration after cleaning.
• Repeated calibration failures after cleaning: If no change in readings is observed after cleaning, replace the electrode.
• pH electrode responds slowly or non-reproducibly: Signs of a coated/clogged pH glass include slow response and erratic measurements. Clean the bulb with a high-quality detergent, methyl alcohol, or suitable solvent (using a Q-tip), rinse well with distilled water, and retest. If response is erratic, soak in 0.1 Molar HCl for 5 minutes, rinse, soak in 0.1 Molar NaOH for 5 minutes, rinse again, then place in pH 4 buffer for 10 minutes before use.
• Conductivity calibration entry rejected: The controller only accepts conductivity calibration values within 1/3 to 8x the present reading. Entries outside this range cause a default to the original reading; if this happens, contact technical assistance.
• Timed sampling readings seem outdated: For conductivity readings on timed sampling/sample & hold systems, readings update at the end of the sampling period. Press the #2 key to force a sample and updated reading while in the RUN screen.

Introduction
The MegaTronXS microprocessor-based controllers are designed to provide a wide range of control functions
for recirculating water treatment systems. The controller is programmed through a front panel keypad and
can be configured to provide a customized control system for your application. Your particular unit’s functions
can be determined by comparing the units’ model number to the Model Numbering table listed below.
Model Numbering
MegaTronXS units have several base system control functions and unit optional features. Your unit may be
supplied with one or more of the features described in this manual. To determine what features apply to your
unit, check the model number label located on the controller enclosure.
Base System Control Functions
C – Tower Conductivity Control
B2 – Boiler No Temp Conductivity
M – Make-up / Misc Conductivity
P – pH Control
Q – Dual pH Control
R – ORP Control
F1 to F5- Chemical Feed Timers
E – Flow Switch
Whole Unit Optional Features
A – Conduit Connections (115 VAC)
A3 – Liquid tights only for (220-240 VAC)
H – Internet communications card
H11 – Internet card with Modbus TCP/IP
H21 – Internet card with BACnet TCP/IP
N4 – 4-20mA inputs (four)
O4 – 4-20mA outputs (four)
W1 – 1 auxiliary flow input for a bleed flow alarm
W4 – Auxiliary Flow Meter Inputs (four)
Y – ETL Agency Listing / Approvals
Model numbers start XS followed by the System Control functions. A dash separates the whole unit options
listed after all base system control functions. Example: XSCPF3E-N4.
Notice: Your unit may not have all the features and functions described in this manual. This list represents
our most popular options, additional option codes are available. Consult a representative for more details.
Description of Unit
MegaTronXS controllers control a single recirculating water system including cooling tower and boiler
applications and may have various features depending on the model number.
Control Functions
Each of these control functions are based on an analog input from a probe and will include user settable relay
control settings along with a High and Low Alarm setting and Limit Timer. Each control function will include a
control relay output. When the reading reaches the Set Point the control relay is activated until the reading
changes by the Differential amount.
1. System Conductivity – The conductivity function of the controller is designed to monitor and
control Total Dissolved Solids (TDS) in a recirculating system like a cooling tower or boiler in terms
of electrical conductivity measured in MicroSiemens/cm. This control function is also referred to
as Bleed.
2. Make-up or Miscellaneous Conductivity -This conductivity with the probe installed in the fresh
make-up water line can be used to control the conductivity of the tower in terms of cycles of
concentration by calculating the difference between the make-up water’s conductivity and the
system’s conductivity. It can also be used to monitor another conductivity with no feed timers
associated with it.
3. pH – The pH function monitors and controls pH on a scale of 0-14 pH units.
4. ORP – The ORP function monitors and controls ORP on a scale of +/- 1000 mV.
4
Chemical Feed Timers
Chemical feed timers are designed to automate the addition of various chemicals by activating a relay output.
Multiple timers can be supplied depending upon the model number and each timer will include a relay output.
All timers can be programmed to be one of the following types.
1. Pulse Time – Accepts pulses from a make-up water meter (supplied separately). It can accumulate
1-9,999 gallons before activating the timer to run.
2. Feed with Bleed – Activates the relay output simultaneously with the bleed and limits the amount
of time the relay output will be on during the bleed cycle.
3. Feed after Bleed – Activates the relay output based on a user defined percentage of time based
on the bleed off, another timer or digital input. The relay is activated after a bleed cycle and runs
for the set percentage of that bleed cycle.
4. Recycle – The relay is continuously repeating a defined OFF cycle time and a user defined ON
cycle time.
5. 28 Day – The timer is based on a 28-day cycle, with four independent programmable feed cycles
with prebleed and bleed lockout settings.
II. Installation
Electrical Wiring
The MegaTron XS controller has an internal regulated fused power supply that will operate off of 90 to 250
VAC at 47 to 63 Hz on the incoming wiring. Each output relay is individually protected with a replaceable fuse.
Relay outputs will equal incoming line voltage.
CAUTION
1. There are live circuits inside the controller even when the power switch on the front panel is in
the OFF position. Never open the front panel without first disconnecting power from the outlet.
Prewired controllers are supplied with an 8 foot, 18 AWG power cord with USA style plug. A #1
Phillips driver is required to open the front panel.
2. Low voltage signal wires (probes, flow switch, water meter, etc.) should never be run
in conduit with high voltage (like 115VAC) wires.
3. Never attempt to land connections to the controller without first disconnecting power from the outlet.
4. Do not block access to disconnect power during mounting and installation.
5. The controller should be connected to its own isolated circuit breaker, and for best
results, the ground should be a true earth ground, not shared. Any attempt to bypass the grounding
will compromise the safety of users and property.
6. The electrical installation of the controller must be performed by trained personnel only and
conform to all applicable National, State and Local codes.
7. Operation of this product in a manner not specified by the manufacturer may result in damage
to equipment or persons.
8. Avoid mounting in locations that expose the controller to direct sunlight, vapors, vibration,
liquid spills or extreme temperatures; less than 0°F (-17.8°C) or greater than 120°F (50°C).
EMI(electromagnetic interference) from radio transmissions and electric motors can also cause
damage or interference and should be avoided.
! !
5
NOTE: Units should be ordered with the appropriate option to provide powered relays designed for
the incoming/outgoing power.
Pre-Wired
Pre-wired units are supplied with a 16 AWG cable(s) with 3-wire grounded USA 115 volt plug for incoming
power and 3-wire grounded receptacle cords for all control relay outputs also 16 AWG.
Conduit
Conduit units are predrilled at the factory and supplied with conduit knockouts for easy hard wiring to supplied
detachable connectors on the relay card(s) located in the lower section of the controller. Remove the screws
of the lower panel for access.
NOTES:
1. Do not drill holes in the upper section of enclosure.
2. All relays provide a N.O. and N.C. output.
3. The control function that activates each relay output is pre-configured at the factory based on the
options selected. To change relay activation, see on page 24.
4. See page 34 for common bleed / blowdown valve wiring.
5. Refer to label inside lower panel cover for specific relay board configuration supplied.
6. Relays configured as “dry contact” should only have D.C. voltage ran through them. The GND
connection point replaces the NEU when configured for dry contact. (Example: Use GND and N.O.
for a normally open dry contact relay output.)
WARNING: If jumpers are not configured for dry contact, line voltage will be supplied.
Relay Card Wiring
Rev. I Relay Card Rev. N Relay Card
!
SE
SE
ontact
olt relay
n Cable 10
9
Rev. D
elow
ange it
RD and
elay.
Powered relay Dry contact
y on
ollers
INPUT
FUSE
FUSE
FUSE
FUSE
FUSEFUSE
2
1
10
9
NEU
GND
N/O
N/C
NEU
GND
N/O
N/C
NEU
GND
N/O
N/C
NEU
GND
N/O
N/C
Relay
1
Relay
2
Relay
3
Relay
4
Relay
5
R1
R2
R3
R4
R5
Incoming
Power Fuse
15 amp
H N G Incoming
Power
Relay Fuses
are 3 amp
Relays are shown configured for powered outputs.
[ Change jumpers to these configurations for dry contact. ]
Relays
1-3
Relays
4 & 5
Relay Card
Rev N
R1
R2
R3
R5
MegaTron relay card revision N adds a 15 amp fuse on the incoming power
to the board and small LED’s for each realy to indicate when the motherboard
has called for it to be activated.
Rev N Relay Board
NEU
GND
N/O
N/C
R4
LED
LED
LED
LED
LED
1
2
3
5
4
6

Motherboard and System Card Connections

XS Megatron Main, Rev.
VDC Output
Connections
Gnd
Gnd
-12
-12
+12
+12
+5
+5
Aux Flow Inputs
+5
Gnd
Gnd
Input 1
Input 2
Input 3
Input 4
LED
Cable
Comm Card
Slot
4-20mA
Slot Open System
Slot
Battery
LED
Red
Black
Green
White
Ground
Digital Input 5
Digital Input 4
Digital Input 3
Ground
Digital Input 2
Digital Input 1
Water Meter Ground
Water Meter 2 Signal
Water Meter 1 Signal
Flow Switch
Black
Red
Red
Black
Standard System Card
ORP
ORP
pH
pH
Note: Use 22 AWG
(.76 mm) twisted
pair shielded wire
for all of these low
voltage signal
connections.
System Conductivity
Temperature
Note: Conductivity
probe’s wire colors
may vary. If so,
match based on
cond and temp.
Misc. Conductivity
Temperature
Red
Black
Green
White
White
WARNING!
Black
Red
Green
Orange
Blue
White
Black
Red
Green
Digital Input 5
pH
pH
Ground
Ground
Water Meter Ground
Water Meter 2 Signal
Water Meter 1 Signal
Flow Switch
Digital Input 4
Digital Input 3
Digital Input 2
Digital Input 1 Note: Use 22
AWG (.76
mm) twisted
pair shielded
wire for all of
these low
voltage signal
connections.
Note:
Conductivity
probe’s wire
colors may
vary. If so,
match based
on cond and
temp.
6 conductors plus a
shield must be ran
from the controller to
the probe. Connect
the 4 wires for the
temperature at the
terminal block
supplied with the
sensor as shown.
Note: For probes with Red & Green
RTD temp wires. To check probe’s
RTD, measure across red & green
with an ohm meter. At room temp it
should read around 1097 ohms.
+5 VDC
if 2nd Temp
not used
Option C8 Wiring
pH
pH
Ground
Ground
Water Meter Ground
Water Meter 2 Signal
Water Meter 1 Signal
Flow Sw

4-20mA Output Card Wiring
A. Isolated Configuration
For isolated 4-20mA outputs, an external power source for the loop must be supplied. JP4 and JP5 on the
board must be jumpered for isolated, with an external power source supplied to the external VDC input. The
external power source must not exceed 24 volts DC.
B. Non-isolated Configuration
For non-isolated 4-20mA outputs, the controller will supply the power for the loop. JP4 and JP5 must be
jumpered for non-isolated, and no connections are made to the external VDC points.
NOTE: The power for the mA output loop is always provided by the controller with either isolated or nonisolated configuration.
4-20mA Input Card Wiring
The 4-20mA input card requires that the external device sending the 4-20mA input signal(s) supply the power
for the loop. The external power source must not exceed 24 volts DC.
NOTE: Older green versions of the 4 input cards supply +12 VDC and ground on the voltage terminals, and
newer blue versions supply +12 and -12 VDC instead of ground on the “G” positions when configured for
non-isolated voltage (the standard configuration)

Mounting Instructions
Select a mounting location that provides the operator easy access to the unit and a clear view of the
controls through the cover of the controller. The location should be convenient to grounded electrical
connections, the needed sample line plumbing, and should be on a stable vertical surface.
Electrode Installation
MegaTronXS controllers may come configured for various circulating water systems. Listed below are
instructions for typical cooling tower and boiler installations. Your specific installation requirements may
differ, but should conform to these instructions as much as possible for proper operation.
A. Cooling Tower
The standard probe(s) and/or flow assembly for cooling tower installations is constructed of schedule
80 PVC and supplied with 3/4” slip fittings for installing into a sample line. To ensure proper operation,
the sample line must have a flow rate of 3-10 gpm. Inlet pressure must be higher than outlet pressure in
order for water to flow past the electrode(s) to achieve the required rate. The probes are temperature
compensated for increased accuracy.
NOTES:
1. Install an isolation valve on either side of the flow assembly so electrodes can be
easily isolated for removal and cleaning.
2. A line strainer is recommended upstream from the probes to protect against fouling
and damage.
3. Mount pH or ORP electrodes vertically.
4. Green solution reference wire must be connected to either pH or ORP sensor. If both
pH & ORP are present on the system card, only one solution reference connection is
needed.
5. Systems with a flow switch require a 2-3 gpm flow rate to operate outputs.
WARNINGS:
1. Electrodes are O-ring sealed, which if damaged will cause a leak.
2. Do not allow pH sensor tips to dry out, damage will occur.
3. Do not exceed a water temperature range of 32°F-140°F (0°C-60°C).
4. Do not exceed a maximum pressure of 125 psi (8.62 bar).

Typical Cooling Tower Installation Diagram

Cooling Tower Probe Assembly

B. Boiler
Standard boiler electrodes have a MNPT stainless steel bushing and are supplied with a FNPT cross designed for mounting in the skimmer (surface) blowdown line. Sampling of the boiler’s water can be achieved using one of two typical plumbing configurations (continuous sampling or timed and/or sample & hold). For a successful installation, it is critical to observe the recommended distances and pipe sizes provided in the installation drawings.
For the best results, the electrode cross should be mounted in a 1” skimmer blowdown line within 4’ of the boiler. Smaller line sizes and greater distances may affect the response time and accuracy of the electrode. A flow-throttling device downstream from the probe (within 24 inches) is required to ensure that the electrode is exposed to water and not steam. Properly installed and adjusted, this device will prevent flashing in the electrode chamber.
NOTES:
1. Install a fully ported type of valve between the electrode and the boiler. This allows
the electrode to be isolated for removal and cleaning.
2. A flushing line and 1/4 turn type ball valve should be installed in the bottom of the cross to periodically “flush” sediment from the electrode chamber.
3. Make sure the alignment arrows on the probe end up parallel to the flow for best performance.
WARNINGS:
1. The probe must be fully immersed in the system water to read correctly. Steam flashing will result in incorrect readings.
2. Do not exceed a maximum water temperature of 436°F (224°C)
3. Do not exceed a maximum pressure of 350 psi (24.1 bar)
4. A throttling device must be installed downstream from the electrode.
Boiler Conductivity Electrodes
BE-4RTD and BE-32
Wiring Note: BE-4RTD probes require a 6-conductor cable from controller to probe, BE-32 probes only require a 2-conductor cable.
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Typical Continuous Sampling Installation
3452189076SET UPRUNCANCELHELPBACKENTERHOMEElectrically actuated blow down valve1/2” pipe between probe and throttle device and flush valveElectrode within a 1” cross with electrical connection ventedThrottling deviceFully ported gate or ball valve1” Continuous blow down line
!
Warning – Always follow local installation requirements and regulations concerning automated blowdown lines.
Typical Timed Sampling and Sample and Hold Boiler Installation
3452189076SET UPRUNCANCELHELPBACKENTERHOMEThrottling devicewithin 24” past probeElectrode within a 1” cross with electrical connection vented1” Continuous blow down lineFully ported gate or ball valve1/2” pipe between probe and throttle device and to the flush valveElectrically actuated blow down valveTo drain
!
Warning – Always follow local installation requirements and regulations concerning automated blowdown lines.
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III. Front Panel Description
3452189076SET UPRUNCANCELHELPBACKENTERHOMEACI MEGATRONSYS1: TOWER CARD 1COND 1,400 uS/cmpH 7.2ORP 375 mVSYSTEM OK<HOT KEY>STATUS SYS OKTEMP: 72.1FFLOW: ONThursday, August 29, 201302:24:10 PM (Wk1)
NUMBER Keys- Used to enter new values in the SET UP mode and to access desired sub menus.
UP/DOWN – Used to cycle through text options to find desired setting.
LEFT/RIGHT – Used to cycle through text or setting options to find desired setting.
SET UP/RUN – System initializes into RUN mode. Press this key to put the controller in SET UP Mode and see HOME menu page.
ENTER – Used to log a changed value into program.
HOME – Used to go back to the HOME menu page.
CANCEL – Used to cancel a pop-up screen if no change is desired.
HELP – Used to access help screens.
BACK – Used to go back to last menu screen viewed or clear values keyed in that are not wanted.
The bottom right box in the RUN screen mode is a hot key that will take you directly to a particular menu screen. The default is the RELAY status menu, but this can be changed by navigating to the desired screen and pressing the HELP button. Follow the on-screen instructions to set the new hot key location.
13
IV. System Operation Overview
Operation
MegaTronXS controllers have two modes of operation, RUN and SET-UP.
RUN – This mode is for normal operation. In the RUN mode the display will show each system’s parameters. If an alarm is present, the ALARM box will flash how many alarms are activated. No settings may be entered or changed in the RUN mode. Readings are updated every 6 seconds on the screen while in the RUN mode.
Note: Conductivity readings from timed sampling or sample and hold systems (typically boilers) are only updated at the end of a sampling period. Press the #2 key to force a sample and updated reading while in the RUN screen.
SET-UP – This mode is used to adjust settings and readings on the controller. To access the SET UP mode from the RUN screen, press the SETUP/RUN key.
Typical Start Up Instruction
Complete all installation steps before beginning this procedure. Ensure that all controlled devices (pumps, solenoid valves, etc.) are operational and connected to the controller. Open the isolation valves to allow water to pass through the sample stream assembly. Before beginning the startup procedure, familiarize yourself with the programming and operation of the system by reviewing the menus available. Use the keys of the controller to skim through all your options.
A. Calibration
All MegaTronXS controllers are factory calibrated for temperature, conductivity, pH and ORP. All units are shipped with the date preset, and the clock set to your current time. These readings and settings should be verified for accuracy and adjusted as per the instructions listed below.
1. Conductivity – To calibrate the conductivity reading, remove the electrode from the line and wipe the flat surface with a clean cloth. Re-install the electrode and open the isolation valves to allow a sample across the probe. Be sure to allow the reading to stabilize for one minute. Select “SYSTEM COND” from the “CALIBRATION” menu. Then key in the corrected conductivity value. Press ENTER to log in that reading.
Note: Boiler probes must have a fresh hot sample. See page 16 for more details.
2. pH – Under normal operating conditions, pH calibration is achieved using the following steps. From the “CALIBRATION” menu, select “SYSTEM PH.” Enter the correct pH value. Press ENTER to log in the new reading.
3. ORP – To calibrate ORP, from the CALIBRATION menu, select “SYSTEM ORP”. Compare the displayed reading to the actual system ORP. If these readings do not match, key in the correct ORP value, and push ENTER.
There are limits to how much the calibration can be adjusted. The instrument will only accept new conductivity values which are from 1/3 to 8x the present reading. Any entry outside this range will cause a default to the original reading. If this happens, call 1-918-686-6211 for technical assistance.
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V. Menu Navigation
To access the menus, press the Set Up / Run key on the front panel. This takes you to the Home menu. MegaTronXS controller’s menus are easily navigated by pressing the associated number key next to a menu box on the screen. Once you have stepped through the sub menus to reach a point at which a value or selection is made, a Pop-up window will appear, prompting you to enter a desired value or selection.
NOTE: When entering new numeric values, enter all available digits (characters).
1. Home Menu
From the HOME menu select the desired menu.
The menu name explains what parameters can be programmed in the menu.
SETPOINTS – Setting control set points for conductivity, temperature, pH and ORP.
CALIBRATION – Calibrating conductivity, temperature, pH and ORP if present.
TIMERS – Menu for selecting type and settings for all present feed timers.
CUSTOMIZE – Giving the controller, each system, and all relays a user defined name.
ALARMS – View current alarms.
DAY/TIME – Menu for setting date and time.
CONFIGURE – Menus for configuring passwords, relay activations, setting history interval, flow switch, contrast, temperature scale.
HISTORY – Allows for view history on board in a graph form.
WATER METER – Menu for configuring water meter totalizing.
RELAYS – Menu for resetting accumulated “ON” times and manual relay activation.
2. Set Points
The same basic format is used for defining each available analog probe input’s control parameters. Boiler conductivity systems will also have an additional menu step for programming the sampling method desired from continuous, timed or sample and hold.
SET POINTS – For setting the relay set points for the available analog probe readings such as conductivity, pH, ORP, or temperature.
NOTE: In the Setpoint pop-up screen, the direction (Rising or Falling) of the setpoint can also be set. Rising setpoints will activate the control relay when the probe reading rises above the setpoint, and will stay activated until the reading comes down by the amount of the differential. If set for Falling, the relay is activated when the probe reading falls below the setpoint, and stays on until the probe reading comes back up by the amount of the differential.
>HOME SETUP<
SETPOINTS DATE/TIME
CALIBRATION CONFIGURE
TIMERS HISTORY
CUSTOMIZE WATER METER
ALARMS RELAYS
>SYSTEM 1 SET POINTS<
SYSTEM COND mA OUT
SYSTEM TEMP mA IN
SYSTEM pH AUX INPUTS
SYSTEM ORP
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2.1 Set Point Options
SET POINT – What reading turns the relay on.
DIFFERENTIAL – Amount reading changes by before the relay is turned off.
HIGH ALARM – What reading generates a High alarm.
LOW ALARM – What reading generates a Low alarm.
LIMIT TIMER – What amount of continuous bleeding will generate a time alarm notice. The bleed is not locked-out by this alarm.
2nd SET POINT – This valve is used if drum level one (D1) is in alarm.
Note: Each alarm value can also be set up to be displayed or not on the front screen, as well as remotely notified or not, if connected to the WebAdvantage server.
2.2 Make-up or Miscellaneous Conductivity
Tower systems with this option have an additional menu on the review page labeled SAMPLE METHOD. The sample method pop-up screen allows the user to select continuous or cycles control. With cycles selected under Settings a best and worst cycles value is attached to a best and worst make-up conductivity value. The controller will control the cycles proportionally between the two cycles values as the makeup conductivity changes between the two identified values.
BEST MAKEUP – Conductivity of best expected makeup water.
BEST CYCLES – Cycles desired with the best water.
WORST MAKEUP – Worst expected water.
WORST CYCLES – Cycles with the worst water.
SYSTEM MAX – A fixed conductivity set point that overrides the cycles setpoint, if reached.
Note: If continuous is selected the standard settings are used for system conductivity and the miscellaneous conductivity (labeled M COND) is the set points menus.
2.3 pH
The pH set point settings follow the same format as shown above in section 2.1.
INTERRUPT – Allows the Interruption of pH control during bleed, other chemical feed, or both.
pH SET POINT 2 – Is only present on systems with
Dual pH control option. It is a second set point for
applications when an acid and caustic are required. Set Point 1 will be for feeding acid and Set Point 2 for feeding caustic.
Note: When the Limit Time value is met it will force off the control relay being driven by pH or ORP. To reset the limit timer and get the control relay active again, enter a new Limit Timer value.
>SYSTEM 1 COND SETPOINT<
SET POINT 2nd SET POINT
DIFFERENTIAL
HIGH ALARM
LOW ALARM
LIMIT TIME
>SYSTEM 1 COND SETPOINT<
BEST MAKEUP
DIFFERENTIAL BEST CYCLES
HIGH ALARM WORST MAKEUP
LOW ALARM WORST CYCLES
LIMIT TIME SYSTEM MAX
>SYSTEM 1 pH SETPOINT<
SET POINT INTERRUPT
DIFFERENTIAL SET POINT 2
HIGH ALARM
LOW ALARM
LIMIT TIME
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2.4 ORP
The ORP set point settings follow the same format as shown above in section 2.1 and 2.3.
ORP SET POINT 2 – If a 28-day timer is interlocked to ORP, the ORP control will go off of SET POINT 2 during the 28-day timer’s run time.
SETP2 NOTIFY – Allows for an alarm if SET POINT 2 is not reached during interlock.
Note: When the Limit Time value is met it will force off the control relay being driven by ORP. To reset the limit timer and get the control relay active again, enter a new Limit Timer value.
2.5 Boiler Conductivity
Conductivity on boiler systems can be configured for Timed Sampling, Sample and Hold, or Continuous, for the conductivity sampling method.
Timed sampling incorporates a sample timer which allows the boiler to be sampled at periodic intervals. Sample intervals are adjustable from 1 minute to 99 hours, 59 min. Sample duration (on-time) is adjustable from 1 second to 99 minutes, 59 seconds.
Sample and hold uses a sample timer for periodic sampling intervals. The unit will sample for its duration and then hold the blowdown valve closed for a settable period (hold time). The conductivity is checked at the end of the hold period; if additional blowdown is required, the blowdown valve is held open for a preset amount of time (blowdown time). Then the sample cycle is repeated.
Pulse Sample allows the use of a defined “pulse” type feed timer to initiate a sample based on make-up water instead of the sample interval timer.
Continuous sample has a sample of boiler or condensate water go past the probe continuously. If the reading is above the set point, blowdown will continue until the set point has been satisfied.
SET POINT – What reading turns the relay on
DIFFERENTIAL – Amount reading changes by before the relay is turned off.
HIGH ALARM – What reading generates a High alarm notification.
LOW ALARM – What reading generates a Low alarm notification.
SAMPLE INT – Period between samples.
SAMPLE DUR – How long a sample lasts.
HOLD TIME – How long a hold lasts.
BLOWDOWN – How long to blowdown if reading is above the set point after the hold. Hold repeated after BLOWDOWN time.
>SYSTEM 1 ORP SETPOINT<
SET POINT SET POINT 2
DIFFERENTIAL SETP2 NOTIFY
HIGH ALARM
LOW ALARM
LIMIT TIME
>SYSTEM 1 COND SETPOINT<
SET POINT SAMPLE INT
DIFFERENTIAL SAMPLE DUR
HIGH ALARM HOLD TIME
LOW ALARM BLOWDOWN
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2.6 Aux Inputs
Auxiliary inputs are the digital inputs for optional Flow Switch and other digital inputs such as low drum level alarms. From these menus the user can set if they want each of the alarms Displayed, Remote Notification, both, or none.
Note: Digital inputs can have the direction selected between OPEN or CLOSED as the alarm polarity. If set for CLOSED, the input will be in alarm when it sees a closed contact.
2.6 4-20mA Out
Units with a 4-20mA output option will have a menu for setting up the 4-20mA output. The 4mA and 20mA values can be defined by giving the output proportioning capability, i.e., 4mA = a pH of 6.0 and 20mA = a pH of 8.0.
SIGNAL SOURCE – Select which probe reading the mA will use as its reading source.
4 mA VALUE – What the 4mA signal equals
20mA VALUE – What the 20mA signal equals on the assigned signal sources scale.
2.7 4-20mA Input
SET POINT – What reading turns the relay on.
DIFFERENTIAL – Amount reading changes by before the relay is turned off,
HIGH ALARM – What reading generates a High alarm notification.
LOW ALARM – What reading generates a Low alarm notification.
DISABLER – Selected input will disable High/LOW alarm notifications.
3. Calibration
Calibration is for adjusting the displayed value of a probes reading to match your tester or known solution. Pick the system or mA input first. From a particular system pick the probe to calibrate.
CALIBRATION – For adjusting the actual reading values of the available analog probe inputs, such as conductivity, pH, ORP or temperature.
>SYSTEM 1 DIGITAL INPUTS ALARM<
ALARM NOTIFICATION DIGITAL 1
FLOW SW = DISPLAY DIGITAL 2
DIGITAL 1 = DISPLAY DIGITAL 3
DIGITAL 4
FLOW ALARM DIGITAL 5
>OUT 1 SETUP<
SIGNAL SOURCE
4mA VALUE
20mA VALUE
>SYSTEM 1 CALIBRATION<
SYSTEM COND
SYSTEM TEMP
SYSTEM pH
SYSTEM ORP
>mA INPUT 1 SETPOINT<
SET POINT DISABLER
DIFFERENTIAL
HIGH ALARM
LOW ALARM
18
3.1 Conductivity Calibration
CALIBRATE – With a clean probe inline with the system’s water, enter the known (from a calibrated hand-held tester) value. Note: Never enter 0.
RESET ZERO – With the probe out of solution and dry enter a new zero point. Note: Probe must be dry!
NOTE: In the calibration pop-up window, the raw analog-to-digital (A/D) value will be displayed. A new calibration value should only be entered when the probe is sensing a stable A/D value. If the system is a boiler, the associated relay can be forced on in the pop-up to allow for a fresh hot sample. Boiler probes should have fresh hot water blown past them for a minimum of 2 minutes before calibrating. The A/D reading has a range of 0 to 32,767. If it is at one end of the range or the other when trying to calibrate, something is wrong with the probe or wire run.
3.2 pH and ORP Calibration
1 POINT – With a clean probe on-line seeing