AQUASWITCH I & AQUASWITCH II Operation Manual 24 August 05 INSTALLATION • OPERATION • MAINTENANCE Resistivity Model: ASIIR Conductivity/TDS Model: ASIIC ACCURACY • RELIABILITY• SIMPLICITY Water Quality Instrumentation Accuracy • Reliability • Simplicity
AQUASWITCH I & II™ QUICK REFERENCE GUIDE! If you read nothing else in this manual please read this Quick Reference Guide. PLEASE READ and COMPREHEND ALL WARNINGS, CAUTIONS and ADVISEMENTS CONTAINED WITHIN THIS MANUAL. Failure to comply is beyond the responsibility of the Myron L Company. WARNING: ALL MONITOR/CONTROLLERS ARE FACTORY SET TO OPERATE ON 115 VAC. BEFORE APPLYING POWER ENSURE THE INPUT POWER “115/230 VAC” SELECTION IS CORRECT FOR YOUR REQUIREMENTS.
QUICK SET POINT ADJUSTMENT See Section IV.B.2. The set point setting is based upon the user's particular water purity specifications or requirements. 1. While pressing the "SET POINT" switch, turn the Set Point #1 adjustment screw (see figure V.A.1) until the desired set point value is indicated on the display. HYSTERESIS (DEAD BAND) ADJUSTMENT See Section IV.B.3. ELECTRONIC CALIBRATION (CIRCUIT ONLY) See Section V.D.1. Full Scale Calibration V.D.1.a. 1. Press and hold the Full Scale Test switch.
WATER QUALITY BANK A IN USE BLEED GOOD POOR BANK B BANK SWITCH ALARM RESET MYRON L COMPANY AQUASWITCH I™ AQUASWITCH I™ WATER QUALITY BANK A BLEED IN USE GOOD POOR BANK B MEGOHMS - CM BANK SWITCH ALARM RESET SET POINT LOW HIGH MYRON L COMPANY AQUASWITCH II ™ AQUASWITCH II™ Model ASIIR-11 (A Digital Resistivity AQUASWITCH II, with a Range of 0-20 MΩ) 1
TABLE OF CONTENTS SECTION I. II. III. PAGE AQUASWITCH™ ILLUSTRATIONS (ASI & ASIIR- 1 1 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 A. SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 1.
TABLE OF CONTENTS Continued SECTION PAGE 3. IV. V. VI. VII. VIII. IX. X. XI. Recalibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 a. TPC “Calibration”Module Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 b. Precision Resistor Calibration Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 c. System Calibration . . . . . . .
I. INTRODUCTION Thank you for selecting one of the Myron L Company’s newest AQUASWITCH Monitor/controllers. The new AQUASWITCH™ series is based on input from ‘you’ - our customers, time proven designs, and many years of instrumentation experience. Since 1957, the Myron L Company has been providing customers with quality products at an affordable price by designing and producing products that are Accurate, Reliable, Simple to use. Quality you have come to rely and depend on.
AMBIENT TEMPERATURE RANGE: 32°F (0°C) to 140°F (60°C) HOUSING CONSTRUCTION Fully gasketed heavy-duty ABS for splashproof and corrosion resistance. Rated IP64/NEMA 3 Double Insulated (with circuit board ground for OEM operation) DOUBLE INSULATED DIMENSIONS AQUASWITCH I: 6" (152mm) H x 4.8" (122mm) W x 3.8" (97mm) D AQUASWITCH II: 6" (152mm) H x 10.8" (274mm) W x 3.9" (99mm) D SHIPPING WEIGHT AQUASWITCH I: AQUASWITCH II: 0-100% of span Hysteresis Adjustable from 0.
E. SENSORS All sensors feature integral thermistor style temperature sensors to ensure accurate, rapid and reliable automatic temperature compensation. 1. CONDUCTIVITY/TDS AQUASWITCH II Conductivity/TDS Monitor/controllers use the CS51LC or CS51 Series sensor depending on range. The 1.0 cell constant CS51 model is recommended for ranges of 0-10 through 100 µS/ppm. Its compact size allows mounting in a standard 3/4" tee. The sturdy polypropylene bushing is modular for easy, inexpensive replacement.
The above is a Special Order High Temperature sensor with a cell constant of 0.1, made of Titanium, and a Wet-Tap Valve. Additional Ordering Information NOTE: 24 VAC power is required for use with 24 VAC valves. A 115 VAC to 24 VAC step-down transformer accessory is available.
G. AQUASWITCH II RANGE SELECTION GUIDE CONDUCTIVITY/TDS & RESISTIVITY Add Range NUMBER below to instrument model number, i.e. ASIIR -"11" = 0-20MΩ Controller .
II. INSTALLATION A. GENERAL 4. This section provides the recommended procedures for properly installing the AQUASWITCH I Controller, or AQUASWITCH II Monitor/controller, Valve(s), and Sensor. Figure II.A.1 gives an overview of the entire system. Alternate configurations on page 39. rotated or mounted upside down so that the cutouts are on the opposite side. AQUASWITCH II For best results, position your Monitor/controller and sensor as close as possible to the point(s) being controlled.
1. 2. 3. Select mounting site location. Mark and drill the required mounting holes. For hole drilling locations, see figure II.B.1. Insert the 1/4" X 20 screws into the holes from the side opposite the mounting site. Hold the Monitor in place while starting and tightening the mounting screws. 3. PANEL MOUNTING A panel mounting fastening kit is provided with all AQUASWITCH’s.
2. Carefully unfasten and separate the AQUASWITCH's front panel from its enclosure. 3. Disconnect all panel cable(s)/wires from the AQUASWITCH's Control board. 4. Slide the enclosure through the panel cutout until its flange contacts the panel. 5. Insert mounting screws through the flange mounting holes and tightly secure. 6. Reconnect all panel cable(s)/wires and reinstall the front panel. C.
A device to disconnect the AQUASWITCH from the power supply is required. It is recommended that this switch or circuit breaker be labeled as the disconnection device for the AQUASWITCH. Verify that the main AC power source is turned "OFF" or disconnected. 2. Using a standard slot screwdriver remove the two (2) screws on the front panel. 3. Carefully wiggle the front panel to loosen the gasket and pull gently toward you. Do not pull more than about 8 inches/20CM or you could damage the wiring harness. 4.
The following procedures are to be used to install the AQUASWITCH II to 115 VAC main power source. For the procedures to install the optional 230 VAC main power source, the user must first complete the installation procedures in Section II.E.3. Failure to do so could result in damage to equipment and/or property. 1. Verify that the main power source is turned "OFF" or disconnected. 2. Using a standard slot screwdriver remove the two (2) screws on the front panel. 3.
a. USP 25 MODIFICATION (No Temperature Compensation) This simple modification will allow your AQUASWITCH II Monitor/controller to meet the USP 25 requirements by defeating the normal temperature compensation circuit thus giving “uncompensated” readings as required. SENSOR LEADS Specifications: As required to meet USP25. REMOVE THESE THREE LEADS BK WT RD GN NU R- R+ 3S FS SW Installation Briefly For Resistivity models, two resistors are installed in place of the sensor “temperature” sensing leads.
SENSOR LEADS REMOVE THESE TWO LEADS section III.J. 1. 0-10VDC OUTPUT FULL SCALE PUSH TO TEST BK WT RD GN NU R- R+ 3S FS SW S P 1 HYS1 CAL } SPC -11 0-20mΩ DIS DEC INC UP Conductivity/TDS Main CB Assembly Figure II.E.7 SENSOR LEADS INSTALL 10K RESISTOR HERE BK WT RD GN NU R- R+ 3S FS SW CAL Conductivity/TDS Main CB Assembly Figure II.E.8 5. SOLID STATE OUTPUT 24 VDC Unregulated 30mA max. The following instructions are assuming the Monitor/controller enclosure is already open. a .
6. SOLENOID VALVE CONNECTIONS The solenoid valves require electrical power to operate. This power must be supplied by the user. See figure II.E.10 for the suggested valve wiring. This section provides the procedures for making the appropriate electrical connections. VALVE A a. External Power Connection Valves powered by an external USER supplied source, i.e. 115/230 or 24 VAC. 1. 2. Place the USER supplied power cable and watertight cable restraint into the enclosure’s appropriate access hole.
7. ALARM/CONTROL RELAY CONNECTIONS The Myron L Company AQUASWITCH is equipped with a “Dry Contact” relay which is designed to energize/de-energize when the set point is crossed. (See section IV.B.2) for set point adjustment procedure) The relay energizes on increasing or decreasing readings as set by the user, see section IV.B.1.
F . 0-10VDC RECORDER OUTPUT + The 0-10VDC output is designed to give the user the capability of sending a signal to a remote meter, recorder, PLC or SCADA system. A 1. 2. 3. 1. CONNECTION Place the user supplied interface cable and watertight cable restraint into the enclosure's appropriate access hole. Skip for OEM. Connect the Recorder's plus (+) and minus (-) terminal wires to the Recorder output connectors. (See figure II.E.1.) Refer to Section V.D.1.
G . RE-RANGE YOUR AQUASWITCH II (Range Module Installation) 1. DESCRIPTION The AQUASWITCH II Monitor/controllers have been designed for easy field re-rangeability. The Range Module consists of a 16 pin Header that plugs into a 16 pin socket. For available ranges, see Range Selection Guide I.G. When making large range changes in conductivity/TDS, i.e. 1 ppm to 50 ppm, a different sensor may also be required as noted in the Range Selection Guide.
III. OPTIONS & ACCESSORIES A. -4A 4AO 4A/4AO MODULE (4-20mA OPTION) 4-20mA Self/Remote-powered Isolated output module ordered with Monitor/controller. 4-20mA Self/Remote-powered Isolated output module ordered separately (includes harness). 1. DESCRIPTION The 4-20mA option gives the AQUASWITCH II Monitor/controller the ability to send a signal very long distances with minimal interferences and signal degradation.
Physical If the front panel has all ready been removed from the enclosure skip to #3. 1. 2. 3. Using a standard slot screwdriver remove the two (2) screws on the front panel. Carefully wiggle the front panel and pull gently toward you. Do not pull more than about 8 inches/20CM or you could damage the wiring harness. Turn the front panel around so that the back side is facing you. 3. 4. have already connected the other end of the wires as required. a.
4. FULL SCALE TEST SWITCH 0-10VDC BK WT RD GN NU R- R+ 3S FS SW SP1 HYS1 DIS 751 752 753 754 4-20 -11 0-20mΩ } INC DEC SPC CAL UP 756 757 758 759 4-20 CONNECTOR CONNECT 4AO HARNESS HERE REMOVE TO INSTALL SECOND RELAY MYRON L If not, adjust the CAL control marked “4mA” until the DVM indicates 4mA, see figure III.A.5. 5. Press the Full Scale Test Switch, the DVM should indicate 20 milliamps. 6. If not, adjust the CAL control marked “20mA” until the DVM indicates 20mA. See figure III.A.5. 7.
4. CONVERTING A CURRENT TO A VOLTAGE Current measuring devices actually measure voltage, but have an internal resistor as shown in figures III.A.1 & III.A.2 and are scaled to display in current. If you have a voltage input instrument and you wish to utilize the current from the 4A (420mA) Module, the following will help you to make this conversion.
B . PIEZO ELECTRIC ALARM -PA PAO ! Piezo Electric Alarm ordered with AQUASWITCH II. Piezo Electric Alarm ordered separately for AQUASWITCH II. CAUTION - READ FOLLOWING CAREFULLY WARNING: BEFORE STARTING, IF THE AQUASWITCH II IS INSTALLED, ENSURE THE POWER IS OFF. FAILURE TO DO SO COULD CAUSE DAMAGE TO THE INSTRUMENT, AND COULD BE HARMFUL OR FATAL TO PERSONNEL. ONLY QUALIFIED PERSONNEL SHOULD INSTALL OR SERVICE ELECTRICAL EQUIPMENT. 1.
Test 1. Turn power ON. Depending on configuration, the Piezo will sound off when —. NOTE: If the sensor is connected, the solution value, set point value and Set Point Conversion (SPC) jumpers may affect the test. a. For a Resistivity AQUASWITCH II, as shipped from the Myron L Company, the alarm will sound off when the power is applied and stop when the Full Scale Test Switch is pressed. b.
C. TEMPERATURE MODULE -TP TPO Temperature Module ordered with Monitor/controller. Temperature Module Kit ordered separately. Requires; CSXX-TP sensor, Special Order, i.e. CS10-TP or CS40-TP, see sensor data sheet. . 1. DESCRIPTION The Temperature Module (TP) gives the Monitor/controller more flexibility for the user by being in the same package. The Temperature Module is driven by the main display output and is very simple to install.
9. While holding the front panel, align the display to the opening and at the same time, align the Temperature Module mounting holes to the front panel. 10. Reconnect display harness with leads down as shown in figures III.C.1 & III.C.2. 11. Reinstall the four (4) screws and tighten. WARNING: There are two (2) o-rings installed on the switch, one (1) on the threaded shank and the other is under the push button. Both of these must be re-installed to maintain IP64/NEMA 3 ratings. See figure III.C.3. 4.
a. TPC “Calibration” Module Procedure This procedure assumes the front panel is removed. 1. Ensure power is OFF. 2. Remove the sensor leads from the Temperature Module. 3. Remove the 0-5VDC leads from the Temperature Module. 4. Press TP Calibration Module (TPC) firmly into sensor input connectors as shown in figure III.C.5. 5. Attach the DVM to the 0-5VDC output on the TPC module. See figure III.C.5. 6. Turn power ON. The DVM should indicate 0 . 0 volts. 7.
7. If not, adjust the calibration control marked “ZERO” (see figure III.C.1 for location). 8. Install SPAN resistor (1758.56Ω) across sensor terminals BL and OR. See figure III.C.9. 9. The DVM should indicate 5 . 0 volts. 10. If not, adjust the calibration control marked “FS” (see figure III.C.1 for location) until the DVM indicates 5 . 0 volts as shown in figure III.C.9. 11. Press the front panel TEMPERATURE select switch, the display should indicate 1 9 9 . 9 as shown in figure III.C.10. 12.
D . REMOTE ALARM - RA™ RA Ordered as an accessory, includes 8” harness with connector, and two (2) wire nuts. 1. DESCRIPTION This remotely mounted AUDIBLE and VISUAL alarm connects to any Myron L Company AQUASWITCH II Monitor/controller, or brand “X” controller with dry contacts. When activated by the controller the Remote Alarm will provide both an audible and a visual alert at a location other than at the controller.
10. 11. 12. 13. 14. alarm for approximately three minutes or until you improve the water quality (readjust controller set point). If three minutes muting is fine for your application, skip to #10. If three minutes is too long or too short, adjust control inside RA until desired mute time is achieved (adjustable from approximately 15 seconds to 10 minutes). see figure III.D.1. Replace the bottom of the RA, and secure to surface you have selected for its installation.
IV. OPERATING PROCEDURES The front panel illustrations, switch and indicator operational descriptions have been provided to assist the user in identifying and operating the AQUASWITCH I & AQUASWITCH II Monitor/controllers. WATER QUALITY BANK A BLEED IN USE POOR BANK B Section IV.A provides the operational descriptions for each of the AQUASWITCH I and AQUASWITCH II switch and indicator controls. Section IV.B provides the user with recommended Setup procedures Section IV.
! B. CAUTION - READ FOLLOWING CAREFULLY 2. SET POINT ADJUSTMENT The set point setting is based upon the user's particular water purity specifications or requirements. SETUP PROCEDURES 1. These Setup procedures cover (1) converting the alarm circuit to trigger on a decreasing (conductivity) or increasing (Resistivity) reading, (2) setting the alarm circuit set point, and (3) adjusting the hysteresis. 2. The following require that the front panel be removed.
1. Using the “SET POINT CHECK” switch, verify that the display indicates the desired Set Point. NOTE: If the display does not indicate the correct Set Point setting, reference Section IV.B.2 and figure V.A.1 for the procedures to readjust the AQUASWITCH II’s internal Set Point. 2. Observe reading of water being monitored. 3. With front panel removed, press “SET POINT CHECK” switch and observe the reading on the display. With a small screwdriver, adjust the Set Point trimmer (See figure V.A.
V. COMPONENT IDENTIFICATION, CALIBRATION AND PREVENTIVE CARE This section provides detailed illustrations to assist the user in identifying the AQUASWITCH I and AQUASWITCH II primary components and cable connector designations. Section A. Provides the user with the Primary Component Identification. Section B. Provides the user with the Purge Cycle Calibration Procedure. Section C. Provides the user with the Alarm Reset Mode Calibration Procedure. Section D.
B. “PURGE CYCLE” CALIBRATION PROCEDURE AQUASWITCH LOGIC BOARD The Purge Cycle control adjustment (see figure V.A.1) determines the time span that the Bleed and Process solenoid valves are energized during either a Bank A or B Purge Cycle. Turning the adjustment screw fully clockwise equals a minimum Purge Cycle of approximately one (1) minute. Turning the adjustment screw fully counterclockwise equals a maximum Purge Cycle of nine (9) to thirteen (13) minutes. 1. 2.
! D. CAUTION - READ FOLLOWING CAREFULLY CALIBRATION PROCEDURES AQUASWITCH I does not require calibration. All Myron L AQUASWITCH II Monitor/controllers are factory calibrated prior to shipping and are ready to install without further calibration. Calibration should be checked occasionally with the internal Calibration/Full Scale Test switch (FS SW) to ensure continued accuracy. The following procedures are provided in the event that recalibration becomes necessary.
3. SENSOR SUBSTITUTE CALIBRATION NIST traceable Sensor Substitutes are commonly use to verify and calibrate Resistivity Monitor/controllers. Normally they are not needed due to the “built-in “ electronic calibration or “Full Scale Test”. However, your requirements may be such that a crosscheck or verification is required. Sensor Substitutes are available from the Myron L Company, see accompanying chart, figure V.D.1, for part number. 8. Display reading should be full scale of range.
the area of the AQUASWITCH II Monitor/controllers operation, i.e. for a conductivity AQUASWITCH II Monitor/controllers that is operating between 15 and 20µS, the recommended Myron L standard solution is KCl-18. NOTE: For resistivity values, the Myron L Company can supply NaCl standards as low as ~25µS on special order. Extremely low values are available from other sources. Calibrated at 25µS the Ultrameter is capable of very accurate resistivity measurements. 2. 3. 4. 5.
VI. OPTIONS & ACCESSORIES A. OPTIONS ORDERED WITH MONITOR/CONTROLLER PART # DESCRIPTION -4A -PA -35BL -TP -PC 4-20mA Self-Powered Isolated Output Module (ASII only) Piezo Electric Alarm (ASII only) 3 1/2 Digit Backlit Liquid Crystal Display (ASII only) Temperature Module 0-200°C, Requires -TP Sensor (ASII only) Powercord 115 VAC (8 ft. with USA plug and Strain Relief) - NOT for 230 VAC use. SPECIAL ORDER OPTIONS -24VA -24VD -PTS -TPA B.
C. STANDARD SOLUTIONS & BUFFERS 1. CONDUCTIVITY/TDS STANDARD SOLUTIONS Your Conductivity/TDS Monitor/controller has been factory certified to meet certain specifications based on the appropriate Myron L Company NIST traceable standard solutions. These same solutions are available to you. DESCRIPTION The Myron L Company manufactures three basic types of conductivity/TDS standard solutions — KCl, NaCl and 442™. See below.
VII. REPLACEMENT PARTS PRICES AS OF July 1, 2001 PRICES SUBJECT TO CHANGE — contact the Myron L Company for the latest prices. Prices are in US dollars. PART # CIRCUIT BOARD ASSEMBLIES PRICE XXX XXX 753IIRB 758IICB AQUASWITCH I & AQUASWITCH II Power Board AQUASWITCH I & AQUASWITCH II Logic Board ASIIR RESISTIVITY Monitor/controller Circuit Board ASIIC CONDUCTIVITY Monitor/controller Circuit Board $XXX.00 $XXX.00 $301.00 $290.
VIII. LIMITED WARRANTY All Myron L Company AQUASWITCH I Controllers & AQUASWITCH II Monitor/controllers and sensors have a Two Year Limited Warranty. If any AQUASWITCH or sensor fails to function normally, return the faulty unit to the factory prepaid. If, in the opinion of the factory, failure was due to materials or workmanship, repair or replacement will be made without charge. A reasonable service charge will be made for diagnosis or repairs due to normal wear, abuse or tampering.
IX. GLOSSARY 442™ An Internationally recognized “natural water” standard developed by the Myron L Company in 1964. Algorithm A procedure for solving a mathematical problem. See Addendum, Temperature Compensation and TDS Derivation. Anions Negatively charged ions DVM Digital Volt Meter Hysteresis Dead Band — related to alarm set point. The amount of delay or overlap between change from high to low or low to high.
X.
XI. ADDENDUM A. CONDUCTIVITY, TDS, RESISTIVITY and TEMPERATURE RELATIONSHIPS 1. TEMPERATURE COMPENSATION (Tempco) of Aqueous Solutions Electrical conductivity indicates solution concentration and ionization of the dissolved material. Since temperature greatly affects ionization, conductivity measurements are temperature dependent and are normally corrected to read what they would be at 25°C. a.
XI. ADDENDUM Continued 4. RESISTIVITY Resistivity is the inverse of conductivity (the reverse is also true), i.e. 18.2 MΩ = 0.0549 µM or µS, and 0.2 µM/µS = 5 MΩ.
MYRON L COMPANY 2450 Impala Drive Carlsbad, CA 92010-7226 USA Tel: 760-438-2021 Fax: 760-931-9189 www.myronl.
