BS EN IEC 60746-4:2019
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Expression of performance of electrochemical analyzers – Dissolved oxygen in water measured by membrane-covered amperometric sensors
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 32 |
IEC 60746-4:2018 applies to analyzers using membrane covered amperometric sensors. It applies to analyzers suitable for use in water containing liquids, ultrapure waters, fresh or potable water, sea water or other aqueous solutions, industrial or municipal waste water from water bodies (e.g. lakes, rivers, estuaries), as well as for industrial process streams and process liquids. Whilst in principle amperometric oxygen-analyzers are applicable in gaseous phases, the expression of performance in the gas phase is outside the scope of this document. This document is applicable to analyzers specified for permanent installation in any location (indoors or outdoors) using membrane-covered amperometric sensors.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | undefined |
| 5 | Annex ZA(normative)Normative references to international publicationswith their corresponding European publications |
| 7 | English CONTENTS |
| 9 | FOREWORD |
| 11 | 1 Scope 2 Normative references 3 Terms and definitions |
| 12 | 3.1 Oxygen sensor properties 3.2 Electronics |
| 13 | 3.3 Measurement units and solubility of oxygen |
| 14 | 3.4 Test media 4 Influence quantities for membrane covered amperometric sensors 4.1 Temperature 4.2 Pressure 4.3 Dissolved substances 4.4 Flow 5 Procedure for specification 5.1 Zero and span drift |
| 15 | 5.2 Additional specifications for the sensor unit 5.2.1 Electrode and sensor materials 5.2.2 Dimensions of the sensor 5.2.3 Permitted temperature and pressure range 5.2.4 Temperature measurement and temperature compensation 5.2.5 Pressure compensation 5.2.6 Zero current 5.2.7 Sensor sensitivity 5.2.8 Stabilization time 5.2.9 Oxygen consumption 5.2.10 Flow rate 5.2.11 Method and extent of sensor regeneration 6 Recommended standard values and ranges of influence quantities affecting the performance of electronic units |
| 16 | 7 Verification of values 7.1 General 7.1.1 General aspects of verification of values 7.1.2 Testing procedure for linearity of the electronic unit 7.1.3 Rated reference conditions for testing 7.2 Simulator for testing electronic units 7.3 Calibration solutions 7.4 Testing procedures for complete analyzer (sensor unit connected to electronic unit) 7.4.1 Intrinsic uncertainty 7.4.2 Linearity uncertainty |
| 17 | 7.4.3 Repeatability 7.4.4 Interference uncertainty (whole analyzer) 7.4.5 Zero drift and span drift 7.4.6 Output fluctuation of the analyzer |
| 18 | 7.4.7 Delay times T10 and 90 % rise or fall times T90 7.4.8 Temperature compensation |
| 19 | 7.4.9 Operating uncertainty of the whole analyzer 7.4.10 Determination of the sensor unit residual signal 7.4.11 Oxygen consumption |
| 20 | Annex A (informative)Supplementary general information on amperometric oxygen sensors A.1 Sensors’ performance characteristics |
| 21 | A.2 Precautions A.3 Sensor calibration techniques |
| 23 | Annex B (informative)Technique for the preparation of batch calibration standards by the saturation approach [10] |
| 24 | Annex C (informative)Calibration solutions for low levels ofoxygen in water measurement C.1 System development [10] C.2 Description and operation of the system C.3 Further developments |
| 26 | Figures Figure C.1 – Laboratory rig to produce water with a low level of dissolved oxygen |
| 27 | Figure C.2 – Complete system for laboratory testing dissolved oxygen monitor |
| 28 | Figure C.3 – Dimensions of block A |
| 29 | Figure C.4 – Dimensions of block B |
| 30 | Bibliography |
