Series A15/64. Dissolved Ozone Monitor

Transcription

1 Series A15/64 Dissolved Ozone Monitor The Model A15/64 is an advanced electrochemical system for continuously monitoring dissolved ozone concentration in water. It uses a direct sensing ozone probe to measure dissolved ozone specifically, without interference from other sample components, such as residual chlorine. Engineered to perform reliably with a minimum of maintenance, the system is ideal for potable water treatment, ultrapure water systems, cooling towers, fish farming, pharmaceutical grade water, or virtually any ozonated water stream.

2 Electronic Monitor The Dissolved Ozone Monitor electronics package provides a real time display of ozone concentration, external alarm and control outputs, and an isolated analog output. The monitor is housed in a compact 1/4 DIN panel mounted aluminum enclosure, and is also available in a NEMA 4X Fiberglas enclosure suitable for hostile environments. Five switches located on the front panel provide access to monitor programming functions and allow operators to view information such as sample temperature, alarm setpoints, and analog output value. An access code number is required in order to change any of the calibration or setup parameters, protecting the system from unauthorized tampering. The DO 3 monitor may be programmed for either low range or high range measurement. In low range, the monitor displays ozone over a range of PPM with a resolution of PPM (1 PPB). In high range, the display is with a resolution of 0.01 PPM. For special applications, a high range system of PPM is available. An isolated 4-20 ma output is provided for external recording or data logging. This output may be programmed for any required span using the front panel switches, and may be changed to 0-20 ma and used with a shunt resistor to provide zero based voltage outputs if required. An optional PID Control output is also available. Contact outputs provided in the monitor include two programmable control relays with variable deadband and variable time delay functions. An additional alarm relay is provided which will actuate on either low or high ozone condition, or on the failure of the control system to maintain a proper ozone concentration. All variables such as alarm or control setpoints, deadband, and time delay are programmable from the front panel keys. Dissolved Sensing Element The sensing element in the A15/64 system is a polargraphic membraned sensor that is specific to molecular O 3. In operation, ozone diffuses through a membrane at the tip of the sensor and is reduced to oxygen. The reaction causes current to flow between the sensing and counter electrodes, with the current being directly proportional to dissolved ozone concentration. In essence, the sensor operates like a battery, with ozone causing current to flow. Since the sensor consumes ozone in the measurement, sample flow is required for measurement. Sample velocity of at least 0.2 ft./sec. is recommended to insure accurate data. Because a permeable membrane isolates the sensing electrodes from the solution being monitored, the dissolved ozone sensor exhibits

3 excellent zero stability. Zero drift is generally less than 5 PPB over months of operation. Response to ozone is fast, reaching 90% in less than 1 minute, and the polymetric membrane is not degraded by normal water constituents. Should coatings be deposited on the membrane, they can be quickly and easily removed by wiping with a soft cloth. Dissolved ozone sensors are normally used in a flowcell assembly, but are also available in submersible versions for special applications. Sensors will normally last 5 years or more, and they are designed to make normal membrane changes simple and inexpensive. Flowcell Assembly Maximum stability from a DO 3 sensor is obtained when the sample flow and pressure are stable. The A15/64 monitor is provided with a constant head overflow chamber which automatically regulates the sample flow past the sensor. Flow variations at the inlet to the overflow cell have no effect on the ozone measurement, insuring the highest possible data validity. The flowcell is made from clear cast acrylic, allowing the user to view the condition of the membrane without removing the sensor from the flowing sample. The sensor inserts into the side of the flowcell and is sealed in place by double o-rings. The recommended inlet flow rate is 15 gallons per hour (1 liter per minute). For systems requiring a flow system that is not open to atmosphere, a sealed flowcell with 1/8 FNPT fittings for inlet and outlet connections is available. NEMA-4X Version

4 Specifications Display: 16 character alpha-numeric liquid crystal display with back light. Measurement Range: Programmable PPM standard or Sensitivity: PPM above PPM Repeatability: ±0.01 PPM Linearity: 0.5% Response Time: 90% in <60 seconds. Analog Output: Isolated 4-20 ma, 600 ohms max. Output Range: Programmable for any range from 0-1 PPM to 0-20 PPM. Control Relays: Two SPDT, 5A., 230 VAC resistive, with programmable set points. Control Relay Function: Programmable On/Off, Pulse Width Modulation (PWM), or Pulse Frequency Modulation (PFM) Alarm Relay: One SPDT, 5 A. 230 VAC resistive, with programmable set points. Optional Output: PID control output modulates 4-20 ma analog signal. Electrical Connections: To plug-in terminal blocks. Power: 110 VAC, 50/60 Hz., 5 VA max.. Electronic Enclosure: NEMA 1 panel mount standard NEMA 4X Fiberglas optional. Operating Temperature: Electronics -20 to +50 C, sensor 0-50 C. Operating Humidity: 0-99% non-condensing. Sensor Temperature Compensation: Automatic -2 C to +52 C. Sensor: Polargraphic membraned sensor. Sensor Materials: Noryl and stainless steel. Sensor Interconnect Cable: 25-ft. standard, max ft. Accessories: Spare membranes, electrolyte, and o-ring kit standard. Flowcell: Clear cast acrylic. Flowcell Inlet: 1/4" I.D. tubing hose barb (1/8" FNPT in flowcell). Flowcell Drain: 1/2" I.D. tubing hose barb (3/8" FNPT in flowcell). Flow Rate: 7 GPH (0.5 1/min.) minimum, 30 GPH (2 1/min.) maximum. Ordering Information ModeA15/64-C-D-E Suffix C - Enclosure 1 - Panel Mount 2 - NEMA 4X Wall Mount Suffix D - Monitor Style 1 - Standard 2 - With PID Output Suffix E - Sensor Style 1 - Sensor with Clear Flowcell 2 - Submersible Sensor 3 - Sensor with Sealed Flowcell 4 - Sensor with 1 1/2 Flow T Represented By: Accessories Junction box Pipe mounting hardware (for submersion sensor) Piple brackets for NEMA 4X monitor conductor sensor cable Analytical Technology, Inc. 6 Iron Bridge Drive Collegeville, PA Phone: 610/ Toll-Free: 800/ Fax: 610/ sales@analyticaltechnology.com Web: ATI (UK) Limited Bank Chambers, 33 Stamford Street Mossley, Aston-u-Lyne OL5 0LL Phone: +44 (0) Fax: +44 (0) sales@atiuk.com

5 Model A15/64 Dissolved Ozone Monitor - Enclosure Dimensions PANEL MOUNT VERSION 6.10" 154.9mm 3.78" 96mm.34" 8.6mm 5.46" 138.7mm 3.78" 96mm 3.54" 89.9mm ATI-0124, RA, (10/95) NEMA-4X VERSION NOTES 1) Panel Mount Enclosure Material: Aluminum, Black Anodized 2) Nema-4X Encloure Material: Base: Molded ABS, tan in color Cover: Clear Lexan w/ dual hinge 3) Nema-4X Rating: NEMA rated types 4, 4x IEC 529 rated IP66 flammability rating UL-94 HB ATI-010 Page 1 of 7

6 Model A15/64 Dissolved Ozone Monitor - Optional Equipment Dimensions JUNCTION BOX NOTES 1.0" 25.4mm 3.70" 94mm 1.20" 30.5mm 1) Nema-4X Encloure Material: Molded FRP (Fiberglas reinforced polyester),gray in color. 2) Nema-4X Rating: 2.56" 65mm UL listed per std. 508 CSA certified per std. C22.2 No. 94 NEMA rated types 4,4X,6,6P,12,13 CEMA rated types 2,3,4 and 5 IEC 529 rated IP ) Mounting Dimensions: Pg 11 CORD SEAL CONDUIT ADAPTOR Pg 16 TO ½" NPT 3.11" [79mm] x 1.969" [50mm] 4) Part No " 57mm ATI-068, RA, (1/95) Page 2 of 7

7 Model A15/64 Dissolved Ozone Monitor - Installation Diagrams PANEL MOUNT NOTES 3.60" 91.4mm 1) Front of panel is NEMA 1, general purpose only. 2) Panel mounting clips supplied with monitor. 3.60" 91.4mm PANEL CUT-OUT MOUNTING CLIPS (2 PER UNIT) ATI-0125, RA, (10/95) WALL MOUNT - NEMA-4X 1) Wall mounting requires customer supplied screws or bolts. ATI-0126 HANDRAIL MOUNT - NEMA-4X 1) All listed hardware is supplied as part of handrail mounting kit # ATI-043 Page 3 of 7

8 Model A15/64 Dissolved Ozone Monitor - Terminal Block Designations A15/64 DISSOLVED OZONE MONITOR A15/64 DISSOLVED OZONE MONITOR (BACK VIEW) ATI-006, RA, (1/95) 1: AC POWER - Neutral 2: AC POWER - 110V - HOT 3: AC POWER - 220V - HOT 4: AC - GROUND 5: RELAY A - Normally Open 6: RELAY A - Common 7: RELAY A - Normally Closed 8: RELAY B - Normally Open 9: RELAY B - Common 10: RELAY B - Normally Closed 11:CLEANER RELAY C - Normally Open 12: RELAY C/D - Common 13: ALARM RELAY D - Normally Closed 14: ma OUTPUT (+) 15: Unused 16: ma OUTPUT (-) 17: Sensor - White 18: Sensor - Brown or Orange 19: Unused 20: Unused 21: Unused 22: Unused 23: Sensor - Red 24: Sensor - Black 25: Sensor - Green Page 4 of 7

9 Model A15/64 Dissolved Ozone Monitor - System Interconnections SYSTEM WIRING DIAGRAM WITH OPTIONAL JUNCTION BOX A15/64 O 3 MONITOR (BACK VIEW) 5 COND, 22 AWG, SHIELDED CABLE 100' MAX. ATI P/N: ½" DIA. CONDUIT POWER CONDUIT ADAPTOR, Pg 16 TO ½" DIA. NPT OPTIONAL JUNCTION BOX ATI P/N: FOR DISTANCES OVER 25' Pg 11 CORD SEAL PROBE CABLE ATI-069, RA, (1/95) O 3 PROBE Page 5 of 7

10 Model A15/64 Dissolved Ozone Monitor - Sensor Dimensions and Installation FLOW SENSOR DIMENSIONS & OVERFLOW CELL INSTALLATION (4) ¼" DIA. THRU HOLES CUSTOMER MOUNTING OVERFLOW CELL ASSEMBLY P/N: " 107mm 6.40" 163mm 7.00" 178mm CONNECTOR 1) Sensor Material: Noryl EN265 & Stainless Steel D.O 3 FLOW SENSOR P/N: ) Connector is not submersible. 3) Outer diameter of sensor: 1.75" Dia. 44.5mm Dia. CLEAR ACRYLIC 1/16" THK. S.S. 2.75" 70mm ½" BARB FITTING (DRAIN) ATI-0196, RB, (6/97) 4.50" 114mm ¼" BARB FITTING (INLET) IN-LINE SENSOR DIMENSIONS & LOW VOLUME FLOWCELL/FLOW 'T' INSTALLATION CONNECTOR 1) Sensor Material: Noryl EN265 & Stainless Steel 2) Connector is not submersible. 1¼" NPT Flow "T": 1) Max. 50 PSI for Flow "T" operation. 3) Outer diameter of sensor: 1.75" Dia. 44.5mm Dia. D.O 3 FLOW SENSOR P/N: " 107mm 2) Use Teflon tape to seal In-line Sensor. Low Volume Flowcell: 1) Material: Clear Acrylic 1¼" NPT PVC FLOW ADAPTOR 1¼" NPT LOW VOLUME FLOWCELL ASSEMBLY ( ) SCHED. 80, 1½" PVC FLOW "T" ASSEMBLY ( ) (2) ¼" BARB FITTINGS 3.325" 84.5mm ATI-0197, RB, (6/97) 4.813" 122mm (2) 8-32 THREADED INSERTS 1.0" 25.4mm 2.0" Dia. 58mm Dia. Page 6 of 7

11 Model A15/64 Dissolved Ozone Monitor - Sensor Dimensions and Installation SUBMERSIBLE SENSOR DIMENSIONS & INSTALLATION 25' CABLE STANDARD D.O 3 SUBMERSIBLE SENSOR P/N: " NPT 2.2" 56mm SENSOR CABLE TO MONITOR SWIVEL ADAPTOR (2) 2" U-BOLTS & NUTS 2" HANDRAIL TEMPERATURE SENSOR MOUNTING PLATE ASSEMBLY ( ) 5.7" 145mm 4.9" 124mm 1" ALUMINUM CONDUIT, THREADED ONE END OR 1" SCHED. 80 PVC PIPE LENGTH AS REQUIRED (CUSTOMER SUPPLIED) 1" T x T PVC COUPLING ( ) (SUPPLIED WITH SWIVEL KIT) SUMBERSIBLE SENSOR ATI-004, RA, (4/94) ATI-0188, RA, (8/96) SENSOR CABLE TO MONITOR 2" HANDRAIL SWIVEL MOUNTING BRACKET WITH HARDWARE, ( ) 1" T X T PVC COUPLING (SUPPLIED WITH SWIVEL KIT) 1" ALUMINUM CONDUIT, THREADED ONE END OR 1" SCHEDULE 80 PVC PIPE, LENGTH AS REQUIRED (CUSTOMER SUPPLIED) SUBMERSIBLE SENSOR ATI-0155, RA, (4/96) Page 7 of 7