STA-RITE SR-2700 Operating instructions

10 RELAY MULTI-STAGE
BACKWASH CONTROL
PROGRAMMING GUIDE
SR-2700
SR-2700M
Sta-Rite Pool/Spa Group
293 Wright Street, Delavan, WI 53115
North America: 800-752-0183, FAX [phone]
International: 262-728-5551, FAX: [phone], TELEX: ITT 4970245
www.sta-ritepool.com
Union City, TN • Delavan, WI • Mississauga, Ont. • Murrieta, CA
Printed in U.S.A. © 2002, Sta-Rite Industries, Inc. S612 (2/20/02)

2
READ AND FOLLOW
SAFETY INSTRUCTIONS!
This is the safety alert symbol. When you see this sym-
bol on your system or in this manual, look for one of
the following signal words and be alert to the potential for
personal injury.
warns about hazards that will cause death, seri-
ous personal injury, or major property damage if ignored.
warns about hazards that can cause death, seri-
ous personal injury, or major property damage if ignored.
warns about hazards that will or can cause
minor personal injury or property damage if ignored.
NOTE indicates special instructions not related to hazards.
Carefully read and follow all safety instructions in this man-
ual and on equipment. Keep safety labels in good condition;
replace if missing or damaged.
Use equipment only in a pool installation.
Explosion hazard. This controller is not
explosion proof. Do not install or use in an explosive
atmosphere.
Hazardous voltage. Can shock, burn or kill.
This controller is normally connected to either 230 VAC or
115 VAC electrical power. Take all proper precautions for
the voltages involved. Disconnect power before servicing
or making electrical connections to the controller. Do not
remove the controller’s front panel if the supply power is
connected to the controller.
Chemical burn hazard if chemicals feed at no
flow. See Programming pH, Page 21, #8, for details.
CONTENTS
Safety ........................................................................................................2
Introduction...............................................................................................3
Initializing the SR-2700 .............................................................................3
Window Navigating ..................................................................................3
Selecting Items.....................................................................................3
Changing Items ....................................................................................3
Main Menu ...............................................................................................4
Readings ..............................................................................................4
Data.....................................................................................................4
MPS Timers..........................................................................................5
Information ..........................................................................................5
Manual ................................................................................................6
Password..............................................................................................6
Programming .......................................................................................6
Programming an MPS .....................................................................6
Selecting an MPS to Configure .......................................................6
Select Specific Command to Change ..............................................7
Change Control Command .............................................................7
Calibration ...........................................................................................7
Calibrating Flow .............................................................................7
Calibrating pH................................................................................7
Calibrating ORP .............................................................................8
Calibrating Calculated PPM............................................................8
Calibrating Temperature .................................................................9
General................................................................................................9
Data Setup....................................................................................10
Sensors .........................................................................................10
Communication ......................................................................10
Pager Test ...............................................................................11
Pager Numbers .......................................................................11
System ...............................................................................................11
MPS Wizard .................................................................................12
Backwash Configuration .........................................................12
Display .........................................................................................12
Display Setup..........................................................................12
Sensor...........................................................................................12
Security ........................................................................................13
Disable ..............................................................................................13
Reset Menu........................................................................................13
Advanced Programming ..........................................................................14
Selecting an MPS to Configure...........................................................14
Change Control Command ................................................................14
Troubleshooting ......................................................................................15
Appendix A: Menu Tree ..........................................................................16
Appendix B: Chemical Standards ............................................................17
Appendix C: Programming Command List...............................................18
Appendix D: Default Programming .........................................................19
Backwash...........................................................................................19
Programming pH (SR-2700 with Chemical Kit) ..................................19
Programming ORP (SR-2700 with Chemical Kit)................................19
Programming Temperature (SR-2700 with Chemical Kit) ...................20
Relay 9 – Heater ................................................................................20
Main Menu Flow Chart ...........................................................................21
System Menu/General Menu Flow Chart .................................................22

3
INTRODUCTION
The SR–2700 is a programmable controller for commercial
swimming pool filters which allows very detailed control
that can be modified by the operator. This programming
guide introduces and describes all the available windows
and menus of the SR–2700, from navigating and initializing
the windows to programming and customizing specifica-
tions. Please read carefully and take notice of all WARN-
INGS and Notices to ensure safe operation. If there are any
questions after reading through the guide, please call your
local STA-RITE dealer or call STA-RITE directly.
INITIALIZING THE SR–2700 (Figures 1 and 2)
When initializing the SR–2700, it will perform a brief check
of its internal system and set up the memory for operation.
The SR–2700 window will open a window (Figure 1) show-
ing the model type, the current status and all connected
modules (including communication, memory and remotes
(External RAM, modem and printer)). If these items are
detected they will be configured to operate; if not, they will
be disabled.
NOTE: If a module was previously installed but is not
detected, the window will display the message: “WARN-
ING: External ram not detected”.
Once this check is complete, the window will then open to
the STA-RITE Information window (Figure 2). Touch this
window anywhere with the stylus to continue to the main
menu. If not touched, the Controller will automatically
cycle to the Readings window.
At the top of the face of the controller, above the digital
window, you will see two groups of red numbers. These
numbers change every two seconds between a)Influent and
Effluent Pressure and b)pH and ORP. The appropriate mea-
surement is indicated by an LED light.
WINDOW NAVIGATION
This section introduces “Window Navigation”, with guide-
lines to allow customizing window display options, entering
values and programming.
The SR–2700 has a Graphical User Interface (GUI) similar
to “Windows”, but with only one window displayed at a
time. The user interface is a touch-panel display, which
gives access to most of the controller’s functions and set-
tings through a series of menus, sub-menus and buttons.
NOTE: In this text guide, system menus will be indicated in
BOLD CAPITAL LETTERS and sub-menus will be in Bold
Regular Letters. On-window buttons will be displayed in
Bold Italic Letters.
Operate the SR–2700 touch-panel display with a plastic sty-
lus (or other non-marking instrument). When operating the
touch-panel display, hold the stylus as you would an ordi-
nary pen, being careful not to touch the display with your
fingers. Do not exert pressure when using the stylus, as the
panel will respond to a light touch.
NOTE: Using a pen or other sharp object could damage the
display. Do not exert pressure; the display will respond to a
light touch from the stylus. Excessive pressure could dam-
age the display and will void the warranty. To keep display
free of fingerprints, avoid touching it with your hands.
Selecting Items
There are three ways to select menu items on the interface.
1. Touch the menu item directly on the window. The
selected item will open another window to offer more
options.
2. Directly touch the on-window Buttons. The selected
button will open another window, which offers more
options, or will toggle to a different state.
3. Use the directional arrow keys to navigate through the
items (not all windows have arrows). The arrow keys
will usually highlight the selected item. Some windows
have directional arrow keys on the top of the window
which will allow you to change windows.
NOTE: Use the small xon the top right-hand corner of
the window to back out to the previous window.
Changing Items (Figure 3)
NOTE: There is no ‘undo’ function. Once a change is made,
the only way to change it back is to re-enter the original
value.
Figure 1
Model SR–2700R6 11-13-01
Backwash CL
Initializing
Ext RAM Detected
High speed modem detected
Printer installed
STA-RITE Backwash Control System
293 S. Wright Street
Delavan, WI 53115
[phone]
F(800)582-2217
Figure 2
Press to Toggle Window d I 
Enter Value (#.##) x
- > -
Q W E R T Y U I O P < & 7 8 9
A S D F G H J K L : - = 4 5 6
Z X C V B N M , . / # 1 2 3
Cancel Space Enter 0 .
Figure 3

4
The SR–2700 allows you to make changes or customize the
windows. There are two methods for entering or changing
items on the interface.
The Change button will 1) cause a toggle-function menu to
appear or 2) cause a keyboard to appear.
1) If the item to be changed has only a couple of choices,
touch the Change button and toggle through the choic-
es. Directly touch your choices or use the directional
arrows (depending on the window you are viewing) to
select the item intended for change. After the item is
changed touch either the OK button or the xin the
upper right corner of the window to exit (use xto exit
when there is no OK button).
2) If the item to be changed needs to be entered or has
many choices, press Change and a full alphanumeric
keyboard window, with capital letters, numbers and
special characters, will appear. Touch the characters
needed for the change and then touch Enter. The format
for the value to be entered will be on the top line.
Touching Enter will change the value unless the format
is incorrect. If you touch Cancel, you will go back to the
preceding window and the value will not be changed.
NOTE: Touching the top line of this window gives
access to international characters.
MAIN MENU (Figure 4)
This section introduces the MAIN MENU and Sub-Menu
items, along with the functions available. Select the desired
sub-menu by touching it with the stylus. Other sub-menus
will become available when the selected window appears.
(Appendix A has a listing of the menu tree; Pages 23 and 24
have menu flow charts.)
Readings (Figure 5)
The READINGS Window displays an overview of the status
and on times for the sensors showing pressure, pH, ORP
and temperature.
An ‘x’ in the box after Flow 1, 2, or 3 indicates flow; an
empty box indicates no flow. The window’s mid-section
displays the sensor measurement information, which may
be arranged in any order.
When the flow switches are enabled in the programming,
they allow chemical feed while there is flow, but prevent
feed at no flow. Disable the flow switch in the program-
ming to allow chemical feed at no flow.
The Flow Window displays the following:
ITEM: Sensor names.
MEAS: Current measurement reading. The Overfeed box
follows this number. An ‘o’ in any box indicates that that
relay is in overfeed (see Page 9) and will not turn ON until
the overfeed timer is cleared.
SET: Sensor set point.
ON TODAY: Total time the MPS has been on since the last
overfeed clearing time.
RLY: The Relay number.
– more – Accesses FLOW INFORMATION window. See
the section Calibrating Flow (Page 7) in this manual for an
explanation of the Flow Information window.
BACKWASH CYCLE ON: This information is accessed by
pressing –Backwash Info- on the Reading Window. This
window shows various backwash information.
Data (Figure 6)
The DATA Window displays recorded data (history) from all
sensors. The sensor readings may be viewed on the front
panel of the controller or downloaded into a PC to print
through NotePad or Excel. The data recording time intervals
may be set by the operator. The range is from one second
(minimum) to eighteen hours (maximum). (See the GENER-
AL menu/Data Setup sub-menu for more information.) In
the absence of power, the SR–2700 retains all recorded
data and program values for up to ten years.
FLOW1⌧FLOW2FLOW3x
ITEM Meas Set ON Today RLY
P1 6.5
P2 0.0
dP12 0.00.0 00:00:00 7
pH1 7.527.50 00:00:00 6
ORP1 1009.99 00:00:00 2
Temp1 76.8a76.8 00:00:00 9
-more- -Backwash Info-
Figure 5
SN10102 STA-RITE
Thursday
10:38:57
Readings Manual General
Data Password System
Timers Programming
Info Calibration Disable
Figure 4
mm/dd hh:mm pH ORP P1 P2 x
09/10 12:00 7.35 74 0.0 5.4
09/10 08:00 7.42 749 0 0 0 0
09/10 04:00 7.3 751 0.0 0.0
00/00 00:00 000 000 0.0 0.0
00/00 00:00 000 000 0.0 0.0
00/00 00:00 000 000 0.0 0.0
00/00 00:00 000 000 0.0 0.0
00/00 00:00 000 000 0.0 0.0
00/00 00:00 000 000 0.0 0.0
00/00 00:00 000 000 0.0 0.0
DD DU PD PU 
Figure 6

5
The Data Window can be navigated using the buttons at
the bottom of the window. The data down DD or data up
DU buttons will scroll up or down to the beginning of the
previous or next day. The page down PD and page up PU
buttons will go to the beginning of the previous or next
window. The up and down arrows move the data one line
at a time. To see additional information on the same line,
use the left and right arrows.
The Data Window displays the following:
mm/dd hh:mm: The date and time that the recorded sensor
data is displayed.
Sensor readings: The readings for pH, ORP, PPM, tempera-
ture, high pressure, and low pressure are displayed through
the mid-section of the window. To view more readings use
directional arrows.
MPS Timers (Figure 7)
The TIMER window displays the status of the 36 Mini
Programs (MPSs) used to determine which relays, alarms
and pagers should be ON or OFF. Each MPS may be con-
figured for a specific type of control. (Setting up the pro-
gramming for each MPS is found under PROGRAMMING,
Select MPS Module.)
The behavior of the MPS Timers may differ one from anoth-
er depending on the control type for the MPS:
In all cases, the timer will count up when the MPS is OFF.
The timer for the chemical control will count down when
the MPS is ON. (The chemical control computes the
amount of chemical feed time and loads the timer.)
The timer for the heater control will count up when the
MPS is ON.
The MPSs can be viewed in groups of four at a time. Touch
NEXT 4 on the bottom of the window to access the next
four or touch PREV 4 to access the previous four. The
Timers window displays the following:
RLY#: The relay number.
TOTAL: This is the cumulative relay ON time since this
timer was last reset.
ON-TODAY: The current run-time since the last overfeed
clearing.
TIMER: The currently operating timer.
ON/OFF BOX: The current status of the relay is revealed
after the timer. (A box with an ‘x’ in it is ON; an empty box
is OFF.)
CNT: The count is the number of times the relay has turned
ON since it was last cleared.
DAY COUNT: Not used.
Information (Figure 8)
The INFORMATION Window displays important details
regarding the status of the SR–2700, listed as follows:
Software Version: The current software revision number and
the date the software was updated.
Power ON Cycles: Displays how many times the power has
been turned ON or OFF.
Total Hours ON: Displays the total hours the SR–2700 has
been ON.
Serial Number: The unique number for this controller. Enter
this number on the warranty registration card and return it
to STA-RITE immediately.
MPS Delay: When the SR–2700 is turned ON, the default
delay is set at thirty (30 seconds delay). To set the start
delay of an MPS, set the MPS Delay for the number of sec-
onds delay which you require. Set the power ON delay in
the GENERAL menu.
Relays ON: The number of relays ON.
Events: If this number is greater then 10 contact your dealer.
Password Forget: If any password placed on the controller is
forgotten, the number displayed here is required for the
code to clear all passwords. To get the code, please fax the
following information to STA-RITE: Password Forget
Number, Serial Number and Model Number. STA-RITE will
then give you the code to enter in the PASSWORD Menu.
NOTE: The code is a one-time entry and the code will be
different for each controller.
Faults/Warnings: The following faults may appear; if they
persist when power is cycled (except for No System Faults),
contact your dealer:
No System Faults: No faults in system (this is as it should be!)
Memory Checksum: Memory Test
Programming Error: Check the setup file.
Battery Low: Replace battery.
Display: Display not working properly.
Main Memory: Check the main programming – it indicates
that the software was upgraded incorrectly.
RLY# TOTAL ON-TODAY TIMER CNT x
1. 0000:12 00:11:56 00:00:0012
Day Count: 2
2. 0001:11 01:01:55 00:00:00196
Day Count: 5
3. 0004:46 04:49:32 00:00:00915
Day Count: 1
4. 0000:00 00:00:00 00:00:000
PREV 4 OK NEXT 4
Figure 7
Ver: SR–2700 R-3 (6/1/01) x
1. Power ON Cycles 116
2. Total Hours ON 50
3. Serial Number 10299
4. Languages:English/Spanish
5. MPS Delay
6. Relays ON 4
7. Events 0
8. Password Forget 0
9. FAULT: NO SYSTEM FAULTS
10.
11. Model: SR–2700
Figure 8

6
Line 10 is left open for Future Expansion.
Model: The SR–2700 is a backwash controller only; the
SR–2700M is the same as the 2700 with the addition of a
modem. For pH and ORP control capabilities, purchase a
Chemical Kit separately and install it with your SR–2700 or
SR–2700M.
Manual (Figures 9 and 10)
MANUAL offers the option to manually toggle the MPSs on
and off; however, you must provide for it when program-
ming the MPSs. Touching MANUAL opens the Select MPS
Module window. Selecting the desired MPS module group
will open the Manually Toggle MPS window which will
allow you to manually turn an MPS ON or OFF by touching
the box to right of the MPS code (for example, RLY02). If
the MPS is ON, it will turn OFF; if it is OFF, it will turn ON.
The length of time the MPS will stay ON is determined by
the manual MPS time entry in the Programming section. If it
is turning OFF, it will be OFF for the programmed OFF
time. The MPS will then go back to normal automatic con-
trol after the OFF time expires.
Password
Touch PASSWORD to open the keyboard window and type
in the password. See Security section for password levels.
When the security features are enabled, a number other
than ‘0’ will be displayed next to the xin the upper right
corner of the window. You must then enter your password
before you can access the controller for servicing and
reconfiguration.
Programming
The SR–2700 allows for complete custom programming.
The PROGRAMMING window accesses the configuring
and programming parameters available.
There are two types of programming: Basic, (discussed in this
section), and Advanced, (discussed later in this manual). The
controller may be programmed through the touch-panel dis-
play, by using a computer connected by modem, or through
the serial port with an RS232 cable. The MPS WIZARD and
factory default settings start the process, but ultimately it may
need adjusting or Advanced programming. There are a total
of 36 mini programs (MPSs) making up the main program.
Mini programs can be of the following types:
RELAY: Up to ten MPSs directly controlling the relays.
Relays not installed can be used as expansion MPSs.
SOFT RELAYS: The soft relays are software relays, not mechan-
ical relays. Up to 14 soft relays or expansion relays are used to
increase the capabilities of the mechanical relays when more
detailed control is required. You can have from 1 to 14 soft
relays, depending on how many relays are actually installed.
ALARMS: There are four alarms available. The first one con-
trols the red alarm Light Emitting Diode (LED) on the con-
trol panel. Any relay can be used for alarm purposes, but
only this one controls the alarm LED.
PAGERS: The pager MPSs dial the appropriate pager(s).
There are eight pager MPSs, one for each pager number.
To select the programming method, go to System/Prog Mode
and press change to toggle between Basic and Advanced.
LEAVE IT IN BASIC unless you are trained in Advanced; this
manual does not cover Advanced Programming.
Programming an MPS
To customize the program, you must change the commands
of the MPSs from the default values to your requirements.
The SR–2700 evaluates each MPS every second by calculat-
ing the list of commands that make up each MPS. The MPSs
will turn on, turn off, or perform other actions as the result
of these calculations. The MPSs can also skip commands,
depending on conditions specified in the MPS’s program-
ming. This allows multiple set points, shared heaters, super-
chlorination and many other combinations. In the MPS pro-
gramming this is called ‘Sequences’ and the sequence infor-
mation must be specified on each command.
Selecting an MPS To Configure
(Figures 11 and 12)
The first step to Programming is to select which MPS out of
the thirty-six MPSs available need to have commands pro-
grammed. The opening window, Select MPS Module
(Figure 11), displays MPSs in groups of four. Touch the
number group directly on the window to open the Select
MPS to Configure window (Figure 12).
Select MPS Module x
Relays 1-4 5-8 9-10
Soft 1-2 3-6 7-10 11-14
Alarms 1-4
Pagers 1-4 5-8
Figure 9
Manually Toggle MPS x
RLY01 Backwash Filters
RLY02 Backwash Filters
RLY03 Backwash Filters
RLY04 Backwash Filters
PREV OK NEXT 4
Figure 10
Select MPS Module x
Relays 1-4 5-8 9-10
Soft 1-2 3-6 7-10 11-14
Alarms 1-4
Pagers 1-4 5-8
Figure 11

7
Select A Specific Command to Change (Figure 13)
Use the ‘>’ to select the command you want to change:
Selecting ‘Enabled/Disabled’ will allow you to toggle
between the two.
Selecting ‘Initial Delay’ or ‘Time ON’ will allow you to access
the keyboard to enter the change (see the example at the top
of the window). Touch Enter when you have made the
change. Other commands can be changed in the same way.
Change Control Command
See “Advanced Programming”, Page 13.
Calibration (Figure 14)
Always balance the pool to the desired pH, ORP and PPM
levels by hand before calibrating any sensors. Touch CALI-
BRATION from the MAIN menu to open the ‘Select to
Calibrate’ window with the sensor listings. Touch on the
desired sensor to open its calibration window.
Calibrating Flow (Figure 15)
The SR–2700 is compatible with digital flow (square wave)
sensors, but not with analog type (sine wave). Digital flow
sensors improve accuracy, especially when measuring low
flows. The sensor sends out digital pulses to be converted to
engineering units read by the controller.
The flow rate is determined by counting the number of
pulses per unit of time. The SR–2700 uses the equation,
FLOW in GPM = 6X/K x GPM, where:
X = the number of Pulses in 10 seconds; and
K = Pulses/Gallon or Pulses/Liter
NOTE: K is the sensor manufacturer’s preset parameter for
the sensor and determines the sensor’s characteristics.
•The controller will not convert the flow between English
and metric units; the correct adjustment to the K factor
must be made to suit the units.
•The calibrated pulses per gallon are determined by the
actual inside diameter of the pipe it was installed on.
•Consult the sensor manufacturer’s guide for more infor-
mation on calculations.
NOTE: The lower the K factor, the higher the flow will be.
To calibrate the Digital Flow sensor, touch the on-window
button Change and enter the flow constant (K factor) on the
keyboard; touch Enter.
Return to the Calibrate Flow menu. The change will be record-
ed along with the sensor flow reading at the time the calibra-
tion was made. The display is updated every 10 seconds.
NOTE: The most common problems with digital flow sen-
sors are as follows:
•Astuck internal paddle wheel. If this is the problem,
switch to a sensor less likely to get stuck or evaluate the
installation location and make sure to use filtered water.
•Athree-wire sensor is wired incorrectly. Consult the
sensor manufacturer’s guide for more information.
The Calibrate Flow window displays the following items:
Name/Flow 1-3: Column listing of flow readings updated
every ten seconds.
K p/g: The K factor determined by counting the frequency
of pulses per gallon or pulses per liter.
Flow: The flow reading determined by counting the number
of pulses per ten (10) seconds.
Calibrating pH (Figure 16)
NOTE: A Chemical Kit must be purchased separately and
installed for this calibration.
Select MPS to Configure x x
RLY01 Backwash Filters
RLY02 Backwash Filters
RLY03 Backwash Filters
RLY04 Backwash Filters
PREV 4 OK NEXT 4
Figure 12
FILTER Bank Setup Relay#1 x x
>Enabled/Disabled: DISABLED
Initial Delay : 00:00:30
Time ON : 00:04:00
NOTE: The delay needs to be long enough to account
for the heater cool down or previous filters.
CHANGE 
Figure 13
Calibrate Flow x
Name K p/g Flow gpm
Flow 1: 5734.0 0.0 
Flow 2: 6451.0 0.0
Flow3: 6143.0 0.0 
Flow updates at 10 seconds!
Enter the Flow Constant,
K = Pulses/Gallon or Pulses/Liter
CHANGE
Figure 15
Select to Calibrate x
pH ORP PPM T
Flow Pressure
Figure 14

8
NOTICE: IF THE pH IS BELOW 7.4 OR ABOVE 7.6 THE
ORP READINGS WILL BE SIGNIFICANTLY AFFECTED. If
the pH is high, the ORP will not go up as fast as it should
when chlorine is added. This can lead to chlorine overfeed-
ing, which leads to high PPM readings. Be sure to set the
overfeeds (when you are programming) to prevent this. If
the pH is low, the chlorine will be very active with a high
ORP reading and a low PPM measurement.
Measure the pool water pH using a standard test kit. To cal-
ibrate the pH sensor go to the pH Calibration window,
touch the window under Hand Measurement and enter the
current hand calibration measurement values on the key-
board, based on the example at the top of the window.
Touch Enter.
The window will return to the Calibrate pH1 menu display-
ing the value entered; touch OK. The change will be
recorded along with the sensor reading at the time the cali-
bration was made. Touching Reset will clear the calibration
on this sensor.
The pH Calibration window displays the following mea-
surements:
Delta: pH factor used to determine whether or not the
probe is defective. Check probe if reading exceeds 128.
Hand Measure: The manual pH measurement to be
entered.
Current Measurement: The current calibrated sensor
measurement.
Calibrating ORP (Figure 17)
NOTE: A Chemical Kit must be purchased separately and
installed for this calibration.
For the ORP calibration, measure the PPM first using a stan-
dard test kit. Other factors affecting ORP are TDS, cryonic
acid, and ozone.
Make small changes in the calibration. Stop when the chlo-
rine is at the right value. The pH MUST remain constant for
this procedure.
To calibrate the ORP sensor:
1. Touch the window below Hand Measurement and enter
the current calibration measurement on the keyboard.
2. Touch Enter.
3. The window will return to the Calibrate ORP menu (dis-
playing the entered measurement).
4. Touch OK. The change will be recorded along with the
sensor reading at the time the calibration was made.
NOTE: Touch Reset to clear the calibration on this sensor.
Example: The default set point is 700, the measured PPM is
0.5 (1.5 PPM is desired), and the current display shows a
measurement of 710 mV. Using 10-15 mV per PPM as a
rule of thumb, the ORP should be calibrated down 30 mV
below the set point since the PPM is 1 PPM low.
The ORP calibration window displays the following
measurements:
Delta: pH factor used to determine whether or not the
probe is defective. Check probe if reading exceeds 128.
Hand Measure: The manual ORP measurement to be entered.
pH: The pH reading taken during the last calibration.
Current Measurement: The current sensor measurement.
NOTICE: The pH must be between 7.4 and 7.6 (see
“Calibrating pH”, above) when calibrating the ORP Sensor.
If the pH is outside these limits when calibrating the ORP
sensor, the chlorine feed, ORP reading , and PPM measure-
ment may all be incorrect.
Calibrating Calculated PPM (Figure 18)
NOTE: The PPM is automatically calculated from the
ORP and pH readings, so a Chemical Kit is required for
the calibration.
Measure the PPM using a standard test kit. If the PPM mea-
surement by test kit is lower than desired, decrease the cali-
bration. If the measurement by test kit is higher than
desired, increase the calibration.
From the PPM calibration window, touch the +or -buttons
at the bottom of the window to increase or decrease the
PPM reading. When the reading is far away from the manu-
al measurement use the ++or - - buttons to change the
reading quickly.
Calibrate pH1 x
Delta Hand Measure
0.00 6.89
Current Measurement: 7.22
Reset OK
Figure 16
Calibrate ORP x
Delta Hand Measurement pH
0700 7.5
Calibrated Reading: 645
Reset OK
Figure 17
Cal Calculated PPM1 x
PPM 1.48
ORP 710
PH 7.49
-- - + ++ Reset OK
Figure 18

9
The PPM calibration window displays the following mea-
surements:
PPM: The PPM measurement to be adjusted with correct
manual measurement.
ORP: The current ORP measurement used as a reference
point for calculated PPM.
pH: The current pH measurement used as a reference point
for calculated PPM.
Calibrating Temperature (Figure 19)
The Temperature Calibration window displays the follow-
ing items:
Hand Measure: The manual temperature measurement to
be entered.
Current Measurement: The current hand measurement.
Calibrate the Temperature Sensor as follows:
1. Touch the window under Measure;
2. Enter the current temperature (by thermometer)
3. Touch Enter.
4. Return to the Calibrate Temperature menu and touch
OK. The change will be recorded along with the sensor
reading at the time the calibration was made.
NOTE: Touch Reset to clear the calibration on this sensor.
NOTE: In general the temperature sensor is very accurate.
Note, however, that the temperature error may vary depend-
ing on the time of day and the location of the sensor.
If the un-calibrated temperature reading is more than a cou-
ple of degrees off from the temperature by thermometer,
there is a problem. Common problems with temperature
sensors are listed below:
1. The Sensor may need to be moved and reinstalled.
2. The sensor may be damaged. If so, replace it.
•The temperature sensor should have a resistance of
10,000 ohms at room temperature (75° F).
•If water gets inside the sensor it will not work proper-
ly; inspect the cable for damage.
General (Figure 20)
The GENERAL setup window accesses the settings for the
Global Alarm & Delay, Overfeed Clear Time, Filter, and
Power ON Delay, plus a variety of buttons across the bot-
tom of the window to offer more features all described in
the following pages.
Use the directional arrows to highlight the settings. Touch the
Change button to offer choices or to access keyboard input.
These settings must be entered correctly, as they are impor-
tant for calculating correct readings and troubleshooting.
Global Alarm %: Sets the percentage above or below the
set point that will trip the alarm. This can be disabled in the
programming for each specific relay.
Global Alarm Delay: The length of time the alarm waits
before activating the Alarm LED and pager. The MPS
Wizard uses this value as a default value.
Overfeed Clear Time 1: When the current time matches
this time, the overfeed timers will be cleared and any
appropriate data saved.
Overfeed Clear Time 2: When the current time matches
this time, the overfeed timers will be cleared and any
appropriate data will be saved.
NOTE: Set both Overfeed Clear times the same to clear the
overfeeds just once a day.
Filter: This value directly controls the digital filter’s time
constant. The larger the filter value, the slower the con-
troller’s response time. The smaller the filter value, the
faster the controller’s response time.
Power ON Delay: The time lag between turning the power
ON and having any relays turn ON. If it takes a long time
for the sensors to adjust, increase the delay time.
Data Setup – Press the Data Setup button to change the
Time Spacing on the keyboard window. Press Sensors and
the Sensors Setup menu appears. Sensors can be turned ON
or OFF by selecting the desired sensor with the up and
down arrows on the right of the window and pressing
Change at the bottom of the Data Setup window.
Calibrate Temperature x
Hand Measure
78.7
Current Measurement: 72.3
Reset OK
Figure 19
General Setup x
Global Alarm % :25
Global Alarm Delay :600 
Overfeed Clear Time 1 00:00:00
Overfeed Clear Time 2 00:00:00
Filter (Higher is less) :15000 
Power ON Delay 00:00:00
DATA SETUP Modem CHANGE
Figure 20

10
Data Setup (Figure 21)
The Data Setup button located in the lower left corner of
the General Setup window accesses the following list of
items, plus the Sensors button (all described in the follow-
ing pages). Use directional arrows to highlight the setting
and touch the Change button to access keyboard input.
Time Spacing: The amount of time between recordings. The
range is from two seconds to eighteen hours.
NOTE: This is the only value in this window which can be
changed.
% Used: The percentage of the data memory filled.
Number of Days: This number is automatically changed
based on the time spacing. When the time spacing is
changed the SR–2700 will calculate how many days of data
the memory can hold and display it here.
Line: The line the controller will record next. The SR–2700
has 3300 lines. When the data is filled up the SR–2700 will
delete the oldest line to make room for the new data.
Sensors (Figure 22)
Touching the Sensors button, located in the lower left corner
of the Data Setup window, will open the Sensor to Display
window. This window allows the selection of sensor measure-
ments to be displayed when viewing the data. The selections
have no effect on the data being recorded, only the data to be
displayed. Use the directional arrows to highlight the sensor
checkbox for each sensor. Touching the Change button in the
lower right hand corner of the window selects, or unselects,
the sensor box highlighted for each module.
Communication (Figures 23 and 24)
Access the Communication Setup Menu from the General
Setup Menu by pressing the Modem button at the bottom of
the window. This window contains important data details
listed below. It also has multiple windows accessible by a
variety of buttons, which offer more features.
When setting up ‘Communication’ for the first time, enter
the following settings. Use directional arrows to highlight
the settings and touch the Change button to toggle through
choices or to access the keyboard input window.
Rings to answer on: The number of rings required before
the SR–2700 will answer the call. The answering range is
from one to nine rings (1-9); 0 disables answering.
Long Hang-up Time: Specifies the length of time that the
SR–2700 will ignore incoming calls when AcuCOM uses
the ‘Long Hang-up’ command. This command allows
AcuCOM to call other controllers on the same line.
Sync Bytes: These must match the sync bytes in AcuCOM
for communication to be established. Since AcuCOM is a
freely distributed software package, without this command
in place others could call the controller and see the read-
ings. Using the sync bytes prevents all unauthorized access.
More: Pressing this button will access Modem Advanced
Diagnostics (Figure 24). Technical Support may ask for
information from this window.
Status: Modem status
Timer: Modem time
CMD: CMD (Command) status
From Modem: Modem initialization string
To Modem: Sending string (pager/voice numbers)
Reset: Resets timer and status. Resets and initializes the
modem.
Data Setup x
Time Spacing 04:00:00
% used 13.1 
Number of Days 385
Line 2315
Relay ON Times Line 2 
SENSORS CHANGE
Figure 21
Sensor to Display x
pH 
ORP 
PPM 
Temp 
Switch 1 
Switch 2 
Switch 3 
P1 
P2 
DP12 
P3 CHANGE
Figure 22
Communication Setup -more- x
Ring to Answer On :1
Long Hang Up Time :00:30:00 
Sync Byte 1: 0
Sync Byte 2: 0 
Pager Test
Pager #’s CHANGE
Figure 23
Modem Advanced Diagnostics x
Status: 32 PagDelay : 0
Timer: 9056 PagDelay : 0
CMD : 0 PagStatus : 0
From Modem:
11.1 9600,3360 O OK O OK O
To Modem:
Reset Levels – 112dBm, Q= 0
Figure 24

11
Pager Test
Touching the Pager Test button, on the Communication
Setup window, will cause the SR–2700 to dial all the pager
numbers for a quick pager test. You can also test the pagers
using the manual mode. To do this, add a manual time of
two seconds to the programming of the pagers; then select
the MPSs to be dialed in the manual mode.
Pager Numbers (Figure 25)
Touch the PAGER #’s button on the Communication Setup
window to enter the pager numbers. The SR–2700 has the
ability to call up to eight pagers when an alarm condition (or
any number of other operator selectable conditions) occurs.
All information about the page is contained in the dial string
entered. Up to twenty-nine digits for each pager may be
entered. The number should include the pager number, com-
mas (for necessary time delays while dialing), PIN (if used)
with more commas, and the code for this SR–2700.
A typical pager number looks like the number in Figure 25.
This pager has a pin access code of 1889052, and the actual
number going to the pager is 1 2 3. NOTE: The # symbol is
not inserted automatically; it must be included in the string.
The commas are used to create a delay. Each comma gives
a delay of four seconds. Use more commas for longer
delays. The number of commas needed is different for each
pager. To determine the correct number of commas, call up
the pager and count the seconds that elapse before you are
asked for the PIN#; then divide the number of seconds by
4. The result is the number of commas to enter.
A pager receiving the page shown here would show the
code numbers ‘1 2 3’. The code may be anything; each
code should be unique in order to identify the controller
from which the page came. Each pager can receive more
than one entry by using different conditions to start the
page. You can use this attribute to alert operators to particu-
lar alarm conditions.
Touch NEXT 4 to display more pager numbers.
System (Figure 26)
The SYSTEM window contains both important data details
(listed below) and buttons allowing access to more win-
dows offering more features. This section explains each of
these windows and how to navigate through them in order
to program various devices.
When using the controller for the first time, the settings for
current Time, Date, Weekday, Units, Mode, Language and
Programming Mode are already entered. These settings are
important for calculating correct readings and troubleshoot-
ing. If a change is desired, use directional arrows to high-
light the settings and touch the Change button; you can
then toggle through choices or access the keyboard to input
the desired change.
Time: Enter the current time of day. The range is from
00:00:00 to 23:59:59. (Keyboard input)
Date: Enter the current date. For metric units, enter the date
as dd/mm/yr. For English units, enter the date as mm/dd/yr.
(Keyboard input)
Weekday: Enter the current weekday (Monday through
Sunday).
Units: Select Metric or English.
Mode: Enter the current operating mode. The SR–2700 has
three main operating modes as follows:
NORMAL: Automatically controls all relays.
DEMO/OFF: Used for demonstrating the unit and for study-
ing operation. While in this mode, the controller does not
use external sensors and all measurements are set to indus-
try standards. All programming and calibration settings are
active and can be modified.
RELAYS OFF: Turns OFF all relays. It is useful for disabling
the SR–2700 without unplugging it.
Prog Mode: Select between Basic or Advanced program-
ming mode.
MPS Wizard, Display, Sensors, Security, and Reset Menu
All window buttons are explained and described in the fol-
lowing pages.
Select Pager # x
1 18006247244,,,1889052,,123#
2
3
4
NEXT 4
Figure 25
System Menu x
Time :17:24:45
Date :2/11/2001
Weekday :Thursday 
UNITS :English
Mode :NORMAL
Future TBD 
Prog Mode Basic
MPS Wizard DISPLAY Sensor
SECURITY RESET MENU CHANGE
Figure 26

12
MPS Wizard (Selects MPS Module – Figure 27)
See “Advanced Programming”, Page 14.
By touching the MPS WIZARD button, the Backwash
Configuration menu opens. In the Basic Programming
mode, these filters are already programmed. You can
change from Basic to Advanced by touching Clear.
Touching Clear clears all factory default settings. To change
back to Basic, touch Default. The up and down arrows
allow you to scroll up or down.
Display (Figure 28)
The Display button, from the SYSTEM MENU, opens a win-
dow to select the MPS display order. Touch the directional
arrows to go to the desired MPS space to add or delete
items. Touch the Change button to open the Display Setup
window (see below), where the list of measurements and
conditions to enter are found.
Display Setup (Figure 29)
The Display Setup window opens the list of measurements
to enter for each MPS. Navigate the window by using direc-
tional arrows to move the arrow to the desired measure-
ment or condition for each MPS and touch OK.
NOTE: Pressing the box between the up and down arrows will
scroll the window a page at a time.
The window will automatically exit back to show the cur-
rent listing. The process needs to be repeated for each MPS
and measurement.
The measurements in the Display Setup window are
described below:
P1: Influent pressure (pressure on inlet side of filter)
P2: Effluent pressure (pressure on outlet side of filter)
dP: Differential Pressure is the high (P1 or influent) pressure
minus the low (P2 or effluent) pressure.
Flow (Fl-1,Fl-2,Fl-3): These inputs are general-purpose
inputs which can be used either as switches or with flow
inputs.
NOTE: Connect the flow inputs only to sensors or devices
that do not supply voltage. NEVER CONNECT FLOW
INPUTS TO DEVICES THAT SUPPLY VOLTAGE.
ORP: The oxidation/reduction-potential measurement of the
water. This measurement is used in the calculation of PPM
and controls the sanitizer on the SR–2700.
Temp: Filter Water Temperature. This input requires a 10K
negative coefficient thermistor.
PPM: The PPM is calculated from the pH, ORP and temper-
ature measurements.
pH1: Filter Water pH. This input uses temperature compen-
sation for increased accuracy. If the temperature sensor is
not installed, set the temperature input to read the approxi-
mate temperature.
Press the number next to ‘RELAY’ to pick the relay that con-
trols this measurement (0 for no relay). This allows relay
status information to be displayed on the screen next to the
sensor.
Sensor
The Sensor button, located in the SYSTEM Menu, opens the
Installed Sensors window. Use the up and down arrows to
select the desired sensor and press the Change button to
indicate which sensors are installed. The Change button is a
toggle.
Backwash Configuration
x
Rly 1: Filter 1 : BASIC
Rly 2: Filter 2 : BASIC
Rly 3: Filter 3 : BASIC
Rly 4: Filter 4 : BASIC
Rly 5: Circ Pump : BASIC
Rly 6: BkWsh ON Light : BASIC
Rly 7: Level : BASIC
SOFT 11 = Control : BASIC
DEFAULT CLEAR 
Figure 27
# RLY MEAS
1. 1 P1
2. 5 P2
3. 2 dP12
4. 3 pH1
5. 6 ORP1
6. 4 Temp1
7. 0 NONE
8. 0 NONE
 CHANGE
Figure 28
Display Setup x
P1
RELAY: XX P2 
dP12 
Temp 1
RLY
F1-1 
F1-2
F1-3 
OK Totl
Figure 29

13
Security (Figure 30)
The Security button, located in the SYSTEM Menu, opens
the Main Security Setup window.
To enter a password, use the directional arrows to highlight
the desired level and touch the Change button. Use the
keyboard to enter up to ten characters. Touch OK.
NOTE: Touching the top line on the keyboard will provide
additional characters to make passwords also. The pass-
word level will be displayed in the upper right corner of the
window. The SR–2700 will log the highest access level
attained since the last data logging. It contains information
on who gained access and at what time. To clear all pass-
words, move the highlighted area to CLEAR ALL and push
the Change button.
If the Master Password is forgotten, you must fax the follow-
ing information to STA-RITE to clear it:
•Serial number,
•Model Number
•The ‘Password Forget’ number (found on the
Information window).
STA-RITE will then issue a number code to clear all pass-
words. Enter this number in the Enter Password sub-menu
under the SERVICE menu.
The SR–2700 requires use of the master password for access
to the SECURITY menu, thus ensuring that no unauthorized
people (including Sta-Rite) can access the controller.
The security system has four security levels. It has one pass-
word for the MASTER, three passwords for OPERATORs, and
three passwords for SERVICE personnel. This allows you to
track access by giving different personnel different passwords.
The access levels are listed in the following table:
MASTER: This password gives access to all menus including
assigning passwords.
OPERATOR: The operator has access to all areas except for
the security setup. The operator may change programming
and calibration data. There are up to three passwords at this
level, allowing different passwords for different people.
When unattended, the SR–2700 resets to the operator level
after two minutes.
SERVICE: Service has access to the service menu only. In
this menu the service personnel may calibrate or manually
turn on relays but not change the programming. There are
up to three passwords at this level, allowing different pass-
words for different people.
Disable (Figure 31)
The Global Disable feature is used to turn OFF any MPS
group for the time period specified on the page. Select the
desired MPS group by touching directly on the group num-
ber. The highlighted items are disabled according to pre-set
time periods. To restart a disabled MPS, press the Disable
Time twice.
Reset Menu (Figure 32)
The Reset Menu button, located in the SYSTEM Menu,
opens the Reset Menu window. This window allows you to
reconfigure items back to the factory defaults.
Use directional arrows to highlight the appropriate line to
reset and touch the Change button. The controller will ask
“Are you Sure: Y or N”. Touch the appropriate choice to
confirm that the reset should be performed. Except for reset-
ting the controller, line 1, the Reset Menu will stay open for
any more additions.
The Reset Menu has various menu items listed and
described below:
Controller: The same as turning the SR–2700 OFF and ON
without actually cycling power.
All Sensor Cals: Clears all sensor calibration except for flow
meters. Individual sensors can be reset in the calibration
window.
Totalizers: Clears the accumulated count for the flow
meters.
Data: Clears the entire data memory.
MPS Total ON Timers: Clears the cumulative MPS timers.
Overfeed Timers: Clears the daily MPS timers.
General Settings: Sets the general settings to factory defaults.
MPS’s to Factory Defaults: Sets all MPSs to factory defaults
and deletes all previous programming.
Communications: Sets the communication options to facto-
ry defaults (including the modem initialization string).
All MPS Programming: Clears all MPS programming.
Main Security Setup x
MASTER :
OPERATOR : 
OPERATOR :
OPERATOR : 
SERVICE :
SERVICE :
SERVICE :
CLEAR ALL :
Select CHANGE
Figure 30
Highlighted Items are Disabled x
Relays 1-10
Expand 1-14 10 Mins
Alarms 1-4 30 Mins
Pagers 1-8 4 Hrs
12 Hrs
Figure 31

14
Relay ON Time Data: Shows how long relay is on in a day.
It resets to zero.
ADVANCED PROGRAMMING
To program in the Advanced Mode:
1. Go to the SYSTEM menu
2. Use the directional arrows to select Prog Mode
3. Press the Change button to switch from Basic to
Advanced programming mode.
4. Press the Programming button on the MAIN MENU and
the Select MPS Module window will appear.
5. Select the desired relay group
6. Select the individual relay (for example,
‘RLY01Backwash Filters’, Figure 33). up to this point the
directions are the same for basic and advanced mode.
NOTE: Programming in the advanced mode requires spe-
cialized training. If you are not experienced or trained in
setting up and programming a controller of this type, call
Sta-Rite at 1-800-752-0183, or get a qualified technician to
program the controller for you. Attempting Advanced
Programming of the controller with insufficient training can
cause problems in operating the filters and in controlling
your pool/spa water chemistry.
NOTE: If you go into the MPS Wizard menu to ‘Backwash
Configuration’ and select and confirm ‘Advanced
Programming’ you will clear all the settings on the selected
MPSs. Don’t do this unless you understand Advanced
Programming! Selecting Default restores factory defaults for
the selected RLY/MPS.
Selecting an MPS To Configure (Figure 33)
NOTE: If a line is deleted there is no undo; the line will
need to be re-entered.
When the individual relay window appears (in the example,
‘RLY01 Backwash Filters’, Figure 33), select a specific com-
mand to change by touching directly on the line of the indi-
vidual command listed.
For example, the ‘RLY01 Backwash Filters’ window (Figure
33) contains Commands S01 through 04. The columns
show the following information:
CMD: The command numbers. Sequence commands are
indicated with an ’S’ prefix.
The Middle column shows the text commands (entered
through the keyboard window). It is followed by Times, if
needed.
SEQ: The sequence number(s) (if any) associated with this
command. Each command will be valid only when operat-
ing in the sequence(s) associated with it. Up to four
sequences may be specified for each command. (See
Normal CMD or Sequence CMD, below.)
The Dand Ibuttons (bottom right of window) allow com-
mands to be deleted or inserted. When the command is
touched Dor Iwill be displayed between the arrows, indicat-
ing that the key was recognized. The next line touched will be
either inserted or deleted. Press the down-arrow to access
commands 6-10, 11-15, and 16-20 or to cancel Dor I.
After selecting the command to change, the Change Control
Command window (see below) will open to allow changes.
Change Control Command (Figure 34)
The Change Control Command window contains all the
information (for the particular command to be changed)
that is contained in the Readings window. Touch the appro-
priate line to make changes; press OK when done.
The Change Control Command window items are
described as follows:
COMMAND: When the COMMAND line is touched, a list
box will be displayed with all the available commands. You
can then select a command to replace the original command.
VALUE: Some commands require a value to be entered:
1. Touch the VALUE line;
2. The keyboard window will appear;
3. Key in the value and touch Enter.
4. The value will be entered and you will be returned to
the Change Control Command window.
SEQUENCES: A SEQUENCE is a series of commands, listed
in order. During operation, the Controller automatically
evaluates these commands (to determine whether the con-
ditions are right to execute them) and then executes them
(or not) in the order in which they are listed.
RESET MENU x
Reset Controller 
Reset All Sensor Cals é
Reset Totalizers
Reset Data 
Reset MPS Total ON Timers
Reset Overfeed Timers
Reset General Settings
Reset MPS’s to Factory Defaults
Reset Communications
Reset All MPS Programming
Reset ON-Time Data CHANGE
Figure 32
RLY01 Backwash Filters x
CMD SEQ
S01 Sequences ON 1 
02 ON if MPS NONE ON 1 
03 ON DELAY 00:00:00 1
04 Max C Time ON 00:00:00 1 I
05 Min Time OFF 00:02:00 1 D
Figure 33

15
•In order for the controller to evaluate a command during
operation, select at least one Sequence number in this
window. The selected number(s) will appear under SEQ
in the Command window (Figure 33). The available
numbers are 1,2,3, and 4. If no sequences are selected
for a command, then that command will always be
skipped.
•It is possible for more than one sequence to be running
at the same time. In that case only the commands in the
sequence with the highest number will be
evaluated/executed. The other sequences will be
skipped.
•It is also possible to have more than one sequence
selected (such as 1, 2 and 4), but with none of them
running at the same time. In that case, the command
will be evaluated/executed for each selected sequence
when it runs (1, 2 and 4, but not 3).
Normal CMD or Sequence CMD: The sequence commands
are configured (setup) in the same way as the MPS com-
mands. When changing a control command, press the win-
dow button in the lower left corner of the window to
choose between Normal Command and Sequence
Command. Specify the sequence, then set up that
sequence’s associated commands.
Change Control Command x
COMMAND : Sequences ON
VALUE : 7.50
SEQUENCES : 1234
SEQUENCES CMD OK
Figure 34
TROUBLESHOOTING
This section lists common problems with the most likely solution.
IMPORTANT: If any problems remain after reading the guides and troubleshooting procedures, please call Sta-Rite direct-
ly at 1-800-752-0183. Before calling please have the following items ready:
1. The Controller’s Model Number
2. The Software version being used
3. The Type of Modem and the Speed
4. The Controller’s Serial Number.
Part Problem Solution #1 Solution #2
Alarm High pH alarm ON Increase ON time (CO2 = slower
reaction (needs more
time ON)
Flow Cell Magnet will not go up Clean Filter Backwash main filter.
ORP/pH Probe Readings bouncing Clean Probe Check Flow
Flow Switch Not working Check for magnet
Alarm Overfeed alarm ON Increase overfeed time If ORP is correct, increase chemical
feeder size
Sensors Readings not changing Make sure (+) and (-) wires are Make sure controller is in NORMAL
connected correctly
Computer Can not get into comm Reinstall software Search for threed.vbx files
window with new computer
with Windows 98 on it

16
MAIN MENU SUB-MENU DETAIL SUB-MENU
Readings Press Top Line Backwash Information
Data
Timers
Info
Manual Select MPS Module Manually Toggle MPS
Password Enter Password Screen
Programming Select MPS Module Select MPS to Configure
Sel Spec. Command to Change
Change Control Command
Calibration Select to Calibrate Calibrate Flow
Calibrate pH
Calibrate ORP
Cal Calculated PPM
Calibrate Temperature
General General Setup Data Setup
Modem
Pager Test
Pager #’s
System System Menu MPS Wizard
Select MPS Module
Select MPS to Configure
Select New Configuration
Security
Display
Reset Menu
Sensor
Disable
APPENDIX A: MENU TREE (See Pages 21 and 22 for detailed Flow Charts)

17
APPENDIX B: CHEMICAL STANDARDS
National Spa and Pool Institute’s Suggested chemical Standards for Swimming Pools
*For Liquid chlorine, Cal-Hypo and Lithium Hypo (for Gas Chlorine, Dichlor, Trichlor and Bromine compounds
100-200 is ideal).
** Except where limited by Health Dept. requirements (often to 100 PPM).
*For Liquid chlorine, Cal-Hypo and Lithium Hypo (for Gas Chlorine, Dichlor, Trichlor and Bromine compounds
100-120 is ideal).
** Except where limited by Health Dept. requirements (often to 100 PPM).
Table for Pools Minimum Ideal Maximum
Free Chlorine, PPM 1.0 1.0-3.0 3.0
Combined Chlorine, PPM None None 0.2
Bromine, PPM 2.0 2.0-4.0 4.0
pH 7.2 7.4-7.6 7.8
Total Alkalinity, PPM 60 80-100* 180
TDS, PPM 300 1,000-2,000 3,000
Calcium Hardness, PPM 150 300-400 500-1000+
Cyamuric Acid, PPM 10 30-50 150**
Table for Spas Minimum Ideal Maximum
Free Chlorine, PPM 1.0 3.0-5.0 10.0
Combined Chlorine, PPM None None 0.2
Bromine, PPM 2.0 3.0-5.0 10.0
pH 7.2 7.4-7.6 7.8
Total Alkalinity, PPM 60 80-100* 180
TDS, PPM 300 1,000-2,000 3,000
Calcium Hardness, PPM 150 200-400 500-1000+
Cyamuric Acid, PPM 10 30-50 150**

18
COMMAND VALUE DESCRIPTION
No Command
** ON ** Turns the current MPS ON.
** OFF ** Turns the current MPS OFF.
ON DELAY 0 < t < 18:12:15 Delays MPS START time for a specified period after it would normally start
Min Time ON 0 < t < 18:12:15 When in an ON cycle, the MPS will be ON for at least this long
Min Time OFF 0 < t < 18:12:15 When in an OFF cycle, the MPS will be OFF for at least this long
Max Time ON 0 < t < 18:12:15 When in an ON cycle, the MPS will be ON for at most this long
Max CTime ON 0 < t < 18:12:15 When in an ON cycle, the MPS will be ON for at most this long.
The length of ON time is calculated once at the start.
Time ON ONCE 0 < t < 18:12:15 When in an ON cycle, the MPS will be ON for this long.
Overfeed 0 < t < 18:12:15 An MPS will not be ON longer than this between over feed clearing times,
as setup in the General window.
Set Overfeed 0 < t < 18:12:15 An MPS will not be ON longer than this time unless the measurement is
within 5% of the set point.
ON If Time> 0 < t < 23:59:58 The MPS will turn ON if the time is greater than this.
OFF If Time> 0 < t < 23:59:58 The MPS will turn OFF if the time is greater than this.
ON If Time< 0 < t < 23:59:58 The MPS will turn ON if the time is less than this.
OFF If Time< 0 < t < 23:59:58 The MPS will turn OFF if the time is less than this.
ON/OFF If pH >,< 0.00 < x < 9.99 The MPS will turn ON/OFF depending on the pH.
ON/OFF If ORP >,< 0 <x< 999 The MPS will turn ON/OFF depending on the ORP.
ON/OFF If PPM >,< 0.00 <x< 9.99 The MPS will turn ON/OFF depending on the PPM.
ON/OFF If Temp >,< 31.9 <x< 211.9 The MPS will turn ON/OFF depending on the temperature.
ON/OFF If Press>, < 0.0 <x< 99.9 The MPS will turn ON/OFF depending on the pressure.
COMPUTE MPS 1 <x<43 The MPS will jump to the indicated MPS and compute it first
ON If Alarm ON The selected module indicates which alarm this is based ON.
OFF If Alarm ON The selected module indicates which alarm this is based ON.
ON If Overfeed 1 <x< 24 The MPS will turn ON if the overfeed timer has been reached for
the indicated MPS.
ON If SET ALRM 0 <x< 24 The set point alarms are calculated from the alarm percentage. The MPS
will be ON if the indicated set point alarm is ON.
NOTE: the indicated MPS must have already been computed.
Date ON/OFF 1 <x< 31 The MPS will turn ON/OFF depending on the day of the month
WKday ON/OFF 0 <x< 6 The MPS will turn ON/OFF depending on the day of the week. 0 = Sunday,
6 = Saturday.
ON/OFF If MPS 0 <x< 24 The MPS will turn ON/OFF depending on the indicated MPS.
ON/OFF NOTE: The indicated MPS must have already been computed.
ON/OFF If Sw 0 <x< 5 The MPSs will turn ON/OFF depending on the indicated flow switch. Only
ON/OFF module 3 can have 5 switches; the others can have 3 each.
Sequences ON Will set the sequence state to the indicated sequences.
CntR=0@Midnight, Clears the counter at midnight. Each MPS has a counter keeping track of
how many times it turns ON.
Cntr=0 ON Date 0 <x< 31 Clears the counter at the start of the indicated date.
ON/OFF If Cntr > 0 <x< 65535 The MPS will turn ON/OFF depending on the count.
Prop GON 0 <x< 65535 The MPS will use this gain for calculating the proportional feed time on
the ON time.
Prop GOFF 0 <x< 65535 The MPS will use this gain for calculating the proportional feed time on
the OFF time.
Manual ON Time 18:12:15 This is the time the MPS will be ON when turned ON in the manual mode
from the service menu.
ON/OFF If dPress>,< 0 <x< 99.9 The MPS will turn ON/OFF depending on the differential pressure.
Appendix C: Programming Command List
The output from the mini-programs (MPSs) controls the state of the relays, alarms, and pagers. Each MPS is made up of up
to 20 commands from the following list.

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BACKWASH
RELAY 1 - Backwash
No. Command Description
1Sequence 1 ON Turns ON the sequence the commands are using.
2ON if MPS 11 is ON On if the control MPS is on.
3ON DELAY 00:00:30 (Add 4:30 to MPSs for each additional filter).
4Max C Time ON 00:04:00 How long relay stays on each cycle.
5Min Time OFF 01:00:00
6No Command Available for customization of system.
PROGRAMMING pH – WITH CHEMICAL KIT
RELAY 8 - pH - ACID
No. Command Description
1 Sequence 1 ON Turns ON the sequence the commands are using.
2Manual ON Time 00:01:00 Time relay stays ON when manually turned ON
3Prop G ON 2000 Decreases the ON time, which reduces the amount of chemicals being fed
as the measurement approaches the set point.
4 ON if pH > 7.50 pH set point.
5 Max Time ON 00:01:00 How long the relay feeds each cycle.
6 Min Time OFF 00:05:00 Mixing time – this is the time allowed for the chemicals to go to
the pool, mix, and return to the sensor.
7 Overfeed 01:00:00 Maximum time the relay can feed chemicals in one overfeed period of time
8 OFF if Switch 1 is OFF Important! this relay controls the flow switch and prevents chemicals from
feeding if there is no flow. See WARNING below.
9-20 No command Available for customization of system.
1. This command sets the sequences to 1, meaning all the following sequences enabled for sequence 1 will be calculated.
2. Sets the manual ON time for this relay to 1 minute. When the relay is manually turned ON from the service menu it will be ON for
1 minute, and then revert to normal control (Programmed Cycle).
3. Sets the proportional gain to 2000, pH error = 65535 / 2000 = 32, or 0.32 pH units. When the pH error is greater than 0.32 the
MPS will use the full ON time, when the error is less the ON time will be linearly scaled down to less time.
4. The set point is 7.5. When the pH is greater than 7.5 the MPS will be ON. The following commands will modify this ON condition.
If there were no more commands, this MPS would be ON as long as the pH was greater than 7.5.
5. This command will calculate the maximum and minimum times that the relay should be ON. As the current reading approaches
the set point, it will be on for a shorter length of time, thus initiating proportional feed.
6. After the MPS has been through an ON cycle, the OFF cycle will start. This MPS will be OFF for 5 minutes. This time allows for the
chemicals added to mix with the water before more chemicals are added.
IMPORTANT: There should always be an OFF time command following an ON time command to ensure that
the MPS operates properly.
7. This command will limit the amount of chemicals to be fed in a specified time period. If the overfeed timers are set to clear at 8AM
and 5PM, then this MPS would not be ON longer than 1 hour in either of those 2 time periods. If the acid pump can feed 10 gal-
lons per day, this would limit the acid to 0.42 gallons in either time period.
8. Chemical burn hazard. Place this command last in the sequence to be sure that no chemical is pumped when
there is no flow through the filter. This command MUST be last in the sequence in order to function properly. This command is
critical for safety and ensures that the MPS will not be ON when there is no flow. Even if the previous commands determine that
the MPS should be ON, this command, when placed last, will override the other commands and prevent chemical feed at no flow.
PROGRAMMING ORP – SR–2700 WITH CHEMICAL KIT
Note: The ORP is almost the same as the pH except that:
• The delay command is not used and
• The set point will be for ORP.
APPENDIX D: DEFAULT PROGRAMMING
The following tables show the factory default programming.

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PROGRAMMING TEMPERATURE – SR–2700 WITH CHEMICAL KIT
Programming the temperature is similar to programming the pH except that:
•The delay command is not used,
•The set point will be for temperature, and
•The ON Time command will be the Min Time ON.
The Min Time ON command will keep an MPS ON for as long as the time specified. When the temperature is below the set point, the
MPS will be ON and not turn OFF until the set point is reached. This command is used when the temperature typically increases very
slowly.
RELAY 9 – HEATER
NOTE: Nos. 4 & 5 prevent the heaters from cycling ON and OFF.
No. Command Description
1ON Sequences Turns ON the sequence the commands are using.
2 Manual ON Time 00:02:00 The time that the relay stays ON when manually turned ON.
3 ON if Temp < 76.9 The temperature set point.
4Min. Time ON 00:02:00 Turns the relay ON, or if the relay is turned ON by another relay, it will
stay on at least this long.
5Min. Time OFF 00:02:00 The minimum amount of time before the heater will turn ON after it has
been off.
6Overfeed 03:00:00 The maximum time that a relay can be ON in a 24-hour period of time.
7Off if Switch 1 is Off This relay controls the flow switch – it prevents the heater from being ON
if there is no flow.
8No command This relay is available for customization of the system.
APPENDIX D: DEFAULT PROGRAMMING
The following tables show the factory default programming.