π余氯分析仪手册

APPENDICES
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Manual date 12/1/2011
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IPM19 HaloSense Free Chlorine Probe
SAFETY PRECAUTIONS
BEFORE ATTEMPTING TO UNPACK, SET UP, OR OPERATE THIS INSTRUMENT, PLEASE READ THIS ENTIRE MANUAL. MAKE CERTAIN THE UNIT IS DISCONNECTED FROM THE POWER SOURCE BEFORE ATTEMPTING TO SERVICE OR REMOVE ANY COMPONENT.
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5.0 6.0 6.1 Awk.baidu.comB C D E F
Commissioning Troubleshooting Guide Further help General layout drawings Certificates and approval statements Returns Procedure and ‘Free of Contamination Sheet’ Warranty MSDS safety data sheets for : Free Chlorine Electrolyte (ECS2.1/GEL) Cronos / Crius calibration information and sensor setup
Type: Measurand: Range: Resolution: Reproducibility: Stability: Working electrode: Counter electrode: Reference electrode: Membrane material: Flow rate: Temperature range: Temperature compensation: pH-range: Permissible overpressure: First-polarisation time: Re-polarisation time: Response time: Zero-point adjustment: Zero running: Calibration: Housing material: Dimensions: Maintenance intervals: Calibration: Electrolyte: Calibration reagent: Membrane: Interferences:
2.0 2.1 2.2 2.3 2.4 3.0 3.1 4.0
Installation Site selection Unpacking Mounting Water connections Operation Calibration Sensor
4.0.1 4.0.2 4.0.3 4.0.4 4.0.5 4.0.6 4.0.7 Installation Setup Maintenance 4.0.3.1 Routine maintenance 4.0.3.2 Diagnostic maintenance Storage Spares Single flowcell 4.0.6.1 Insertion Double flowcell
MAKE CERTAIN THE UNIT IS DISCONNECTED FROM OTHER SOURCES OF FORCE OR PRESSURE (FOR EXAMPLE, PNEUMATIC OR HYDRAULIC), BEFORE ATTEMPTING TO SERVICE OR REMOVE ANY COMPONENT. FAILURE TO FOLLOW THESE PRECAUTIONS COULD RESULT IN PERSONAL INJURY AND DAMAGE TO THE EQUIPMENT.
Manual date 12/1/2011
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IPM19 HaloSense Free Chlorine Probe
1.0
Theory of Operation
The free chlorine sensor has been designed to measure the concentration of dissolved free residual chlorine. It does this using a Potentiastatic 3-electrode chronoamperometric sensor insulated from the water supply by a hydrophilic membrane. The free chlorine diffuses through the membrane and is reduced at the cathode generating a small current that is proportional to the concentration of free chlorine. In potable, process, or swimming pool water this means HOCl (hypochlorous acid) and OCl - (hypochlorite ion). The relative amount of these two species is dependent on the pH of the solution. At low pH’s the predominant species will be HOCl. At higher pH's the predominant species will be OCl -. Traditional amperometric measurement systems need to be buffered to an exact pH in order that changes in the pH of the sample water do not affect the Free Chlorine measurement. The probe supplied for Free Chlorine measurement with this instrument is not affected by changes in pH to the same degree. This means that on many plants it will not be necessary to buffer the sample water at all. If it is necessary to buffer the sample water, because the pH is both high and variable it will only be necessary to reduce the pH to below 6.5. This is best done using the CO2 Buffer accessory. The probes are available for a variety of ranges which are specified at the time of purchase. The sensor incorporates automatic temperature compensation (ATC).
Typical Probe Response to pH (Unbuffered)
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Chlorine Probe Response Typical Amperometric Probe Response
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Manual date 12/1/2011
Page 1 of 29
IPM19 HaloSense Free Chlorine Probe
TABLE OF CONTENTS
Page No. 1.0 1.1 SAFETY PRECAUTIONS Theory of operation Specifications
1.1.1 1.1.2 1.1.3 Residual Chlorine sensor probe Flow cells Electrochemical Probe Simulator 6 3 4 5
IPM19 HaloSense Free Chlorine Probe
HaloSense Free Cl2 Probe
OPERATING INSTRUCTIONS
PLEASE NOTE: In an attempt to reduce our company carbon footprint, this manual is normally supplied in an electronic format. If you require a printed copy, please ask your sales contact.
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IPM19 HaloSense Free Chlorine Probe
1.1
1.1.1
Specification
SENSOR
Membrane covered amperometric potentiostatic three-electrode system Free Residual Chlorine 0-2, 0-5, 0-10mg/l (ppm) 0.01mg/l (ppm) ±5 % -2 % per month (without calibration) Cathode made of gold Anode made of stainless steel Silver / silver halide Micro-porous hydrophilic membrane 0.5 l/min (0.13 gallon/minute [US]) >5 and <45°C Automatically by an integrated thermistor (ATC) pH 4 up to pH 9.5 0.5 bar 120 min 30 min T90: approx. 2 min Not necessary Running at zero de-polarises the probe Manual using DPD or Automatic (Autocal) PVC, silicone, polycarbonate, stainless steel, perspex Diameter approx. 25mm (1”), length 175mm (7”) On control applications it is a week to a month and on non-control it is 1 to 3 months. Quarterly Six monthly (Autocal unit only) Yearly High levels of other oxidants such as Ozone and Chlorine Dioxide
Tel (UK): 01282 422835 Tel (Int.): +44 1282 422835 Fax: +44 1282 422268 email: service@processinstruments.net Web: www.processinstruments.net
Manual date 12/1/2011