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  • ISO 7888:1985

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    Water quality — Determination of electrical conductivity

    Available format(s):  Hardcopy, PDF, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Language(s):  English, French

    Published date:  16-05-1985

    Publisher:  International Organization for Standardization

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    Abstract - (Show below) - (Hide below)

    Specifies a method for the measurement of all types of water. The quantity can be used to monitor the quality of surface waters, process waters in water supply and treatment plants, and waste waters. Interferences are given.

    General Product Information - (Show below) - (Hide below)

    Committee ISO/TC 147/SC 2
    Development Note Also numbered as BS EN 27888 and BS 6068-2.35(1993) (10/2005)
    Document Type Standard
    Publisher International Organization for Standardization
    Status Current

    Standards Referenced By This Book - (Show below) - (Hide below)

    UNE-EN ISO 5667-3:2013 Water quality - Sampling - Part 3: Preservation and handling of water samples (ISO 5667-3:2012)
    14/30301257 DC : 0 BS EN 13160-3 - LEAK DETECTION SYSTEMS - PART 3: REQUIREMENTS AND TEST/ASSESSMENT METHODS FOR LIQUID SYSTEMS FOR TANKS
    DIN ISO 17289:2014-12 WATER QUALITY - DETERMINATION OF DISSOLVED OXYGEN - OPTICAL SENSOR METHOD (ISO 17289:2014)
    BS 7755-3.4(1995) : 1995 SOIL QUALITY - CHEMICAL METHODS - DETERMINATION OF THE SPECIFIC ELECTRICAL CONDUCTIVITY
    I.S. EN ISO 5814:2012 Water quality - Determination of dissolved oxygen - Electrochemical probe method (ISO 5814:2012)
    17/30338449 DC : 0 BS EN ISO 15175 - SOIL QUALITY - CHARACTERIZATION OF CONTAMINATED SOIL RELATED TO GROUNDWATER PROTECTION
    10/30196530 DC : 0 BS ISO 5814 - WATER QUALITY - DETERMINATION OF DISSOLVED OXYGEN - ELECTROCHEMICAL PROBE METHOD
    BS PD CEN/TS 16811-3 : 2015 WINTER MAINTENANCE EQUIPMENT - DE-ICING AGENTS - PART 3: OTHER SOLID AND LIQUID DE-ICING AGENTS - REQUIREMENTS AND TEST METHODS
    VDI 4630:2016-11 FERMENTATION OF ORGANIC MATERIALS - CHARACTERIZATION OF THE SUBSTRATE, SAMPLING, COLLECTION OF MATERIAL DATA, FERMENTATION TESTS
    PREN 14944-1 : DRAFT 2015 INFLUENCE OF CEMENTITIOUS PRODUCTS ON WATER INTENDED FOR HUMAN CONSUMPTION - TEST METHODS - PART 1: INFLUENCE OF MIGRATION FROM FACTORY MADE CEMENTITIOUS PRODUCTS ON THE ORGANOLEPTIC PARAMETERS
    07/30162208 DC : 0 BS EN 15664-1 - INFLUENCE OF METALLIC MATERIALS ON WATER INTENDED FOR HUMAN CONSUMPTION - DYNAMIC RIG TEST FOR ASSESSMENT OF METAL RELEASE - PART 1: DESIGN AND OPERATION
    BS EN 16192:2011 (published 2012-04) Characterization of waste. Analysis of eluates
    I.S. EN 15664-1:2008 INFLUENCE OF METALLIC MATERIALS ON WATER INTENDED FOR HUMAN CONSUMPTION - DYNAMIC RIG TEST FOR ASSESSMENT OF METAL RELEASE - PART 1: DESIGN AND OPERATION
    PREN 13160-3 : DRAFT 2014 LEAK DETECTION SYSTEMS - PART 3: REQUIREMENTS AND TEST/ASSESSMENT METHODS FOR LIQUID SYSTEMS FOR TANKS
    13/30250160 DC : 0 BS ISO 17289 - WATER QUALITY - DETERMINATION OF DISSOLVED OXYGEN - OPTICAL SENSOR METHOD
    DIN EN 16192:2012-02 Characterization of waste - Analysis of eluates
    DIN ISO 17289 E : 2014 WATER QUALITY - DETERMINATION OF DISSOLVED OXYGEN - OPTICAL SENSOR METHOD (ISO 17289:2014)
    11/30218776 DC : 0 BS EN 60734 ED 4.0 - HOUSEHOLD ELECTRICAL APPLIANCES - PERFORMANCE - HARD WATER FOR TESTING
    BS EN ISO 15091:2012 PAINTS AND VARNISHES - DETERMINATION OF ELECTRICAL CONDUCTIVITY AND RESISTANCE
    I.S. EN 16058:2012 INFLUENCE OF METALLIC MATERIALS ON WATER INTENDED FOR HUMAN CONSUMPTION - DYNAMIC RIG TEST FOR ASSESSMENT OF SURFACE COATINGS WITH NICKEL LAYERS - LONG-TERM TEST METHOD
    ISO 15175:2004 Soil quality Characterization of soil related to groundwater protection
    BS EN 15664-1 : 2008 INFLUENCE OF METALLIC MATERIALS ON WATER INTENDED FOR HUMAN CONSUMPTION - DYNAMIC RIG TEST FOR ASSESSMENT OF METAL RELEASE - PART 1: DESIGN AND OPERATION
    BS EN 62703:2013 (published 2013-11) Expression of performance of fluorometric oxygen analyzers in liquid media
    UNE-EN ISO 15175:2011 Soil quality - Characterization of soil related to groundwater protection (ISO 15175:2004)
    UNI EN ISO 15091 : 2013 PAINTS AND VARNISHES - DETERMINATION OF ELECTRICAL CONDUCTIVITY AND RESISTANCE
    17/30319520 DC : 0 BS ISO 20289 - SURFACE CHEMICAL ANALYSIS - TOTAL REFLECTION X-RAY FLUORESCENCE ANALYSIS OF WATER SAMPLES
    DIN ISO 15175:2005-05 SOIL QUALITY - CHARACTERIZATION OF SOIL RELATED TO GROUNDWATER PROTECTION
    BS EN ISO 5814 : 2012 WATER QUALITY - DETERMINATION OF DISSOLVED OXYGEN - ELECTROCHEMICAL PROBE METHOD (ISO 5814:2012)
    VDI 3478-1 : 2011 BIOLOGICAL WASTE GAS PURIFICATION - BIOSCRUBBERS
    04/30116791 DC : DRAFT JUL 2004 BS EN 15002 - CHARACTERISATION OF WASTE - PREPARATION OF TEST PORTIONS FROM LABORATORY SAMPLE
    10/30233988 DC : 0 BS EN 16192 - CHARACTERIZATION OF WASTE - ANALYSIS OF ELUATES
    BS ISO 15859-10 : 2004 SPACE SYSTEMS - FLUID CHARACTERISTICS - SAMPLING AND TEST METHODS - PART 10: WATER
    09/30199771 DC : 0 BS EN 15937 - SLUDGE, TREATED BIOWASTE AND SOIL - DETERMINATION OF SPECIFIC ELECTRICAL CONDUCTIVITY
    09/30208728 DC : 0 BS EN 13038 - SOIL IMPROVERS AND GROWING MEDIA - DETERMINATION OF ELECTRICAL CONDUCTIVITY
    BS ISO 17289 : 2014 WATER QUALITY - DETERMINATION OF DISSOLVED OXYGEN - OPTICAL SENSOR METHOD
    DIN 7795 E : 2015 MEASURING COMPRESSION SET OF ELASTOMERS IN HOT WATER
    S.R. CEN/TS 16811-3:2015 WINTER MAINTENANCE EQUIPMENT - DE-ICING AGENTS - PART 3: OTHER SOLID AND LIQUID DE-ICING AGENTS - REQUIREMENTS AND TEST METHODS
    BS ISO 15175 : 2004 SOIL QUALITY - CHARACTERIZATION OF SOIL RELATED TO GROUNDWATER PROTECTION
    UNI EN ISO 5814 : 2013 WATER QUALITY - DETERMINATION OF DISSOLVED OXYGEN - ELECTROCHEMICAL PROBE METHOD
    PREN 13038 : DRAFT 2009 SOIL IMPROVERS AND GROWING MEDIA - DETERMINATION OF ELECTRICAL CONDUCTIVITY
    01/710758 DC : DRAFT SEP 2002 ISO/DIS 15859-10 - SPACE SYSTEMS - FLUID CHARACTERISTICS, SAMPLING AND TEST METHODS - PART 10: WATER
    UNE-EN ISO 15091:2013 Paints and varnishes - Determination of electrical conductivity and resistance (ISO 15091:2012)
    DIN 7795:2015-02 Measuring compression set of elastomers in hot water
    UNI EN ISO 15175 : 2011 SOIL QUALITY - CHARACTERIZATION OF SOIL RELATED TO GROUNDWATER PROTECTION
    DIN EN ISO 5814:2013-02 Water quality - Determination of dissolved oxygen - Electrochemical probe method (ISO 5814:2012)
    UNI EN 15664-1 : 2014 INFLUENCE OF METALLIC MATERIALS ON WATER INTENDED FOR HUMAN CONSUMPTION - DYNAMIC RIG TEST FOR ASSESSMENT OF METAL RELEASE - PART 1: DESIGN AND OPERATION
    UNE-EN 16192:2012 Characterization of waste - Analysis of eluates
    NBR ISO 15859-10 : 2018 SPACE SYSTEMS - FLUID CHARACTERISTICS, SAMPLING AND TEST METHODS - PART 10: WATER
    I.S. EN 16192:2011 CHARACTERIZATION OF WASTE - ANALYSIS OF ELUATES
    DIN EN ISO 15175:2011-09 SOIL QUALITY - CHARACTERIZATION OF SOIL RELATED TO GROUNDWATER PROTECTION
    UNE-EN ISO 5814:2013 Water quality - Determination of dissolved oxygen - Electrochemical probe method (ISO 5814:2012)
    I.S. EN 62703:2013 EXPRESSION OF PERFORMANCE OF FLUOROMETRIC OXYGEN ANALYZERS IN LIQUID MEDIA (IEC 62703:2013 (EQV))
    ISO 15859-10:2004 Space systems Fluid characteristics, sampling and test methods Part 10: Water
    I.S. CWA 15145:2005 AUTOMOTIVE FUELS - WATER IN DIESEL FUEL EMULSIONS FOR USE IN INTERNAL COMBUSTION ENGINES - REQUIREMENTS AND TEST METHODS
    BS EN 60734:2003 HOUSEHOLD ELECTRICAL APPLIANCES - PERFORMANCE - WATER FOR TESTING
    UNI EN ISO 5667-3 : 2013 WATER QUALITY - SAMPLING - PART 3: PRESERVATION AND HANDLING OF WATER SAMPLES
    ONORM EN ISO 15175 : 2011 SOIL QUALITY - CHARACTERIZATION OF SOIL RELATED TO GROUNDWATER PROTECTION
    ISO 5667-3:2012 Water quality Sampling Part 3: Preservation and handling of water samples
    S.R. CEN/TS 15937:2013 SLUDGE, TREATED BIOWASTE AND SOIL - DETERMINATION OF SPECIFIC ELECTRICAL CONDUCTIVITY
    15/30317321 DC : 0 BS EN 14944-1 - INFLUENCE OF CEMENTITIOUS PRODUCTS ON WATER INTENDED FOR HUMAN CONSUMPTION - TEST METHODS - PART 1: INFLUENCE OF MIGRATION FROM FACTORY MADE CEMENTITIOUS PRODUCTS ON THE ORGANOLEPTIC PARAMETERS
    CEI EN 60734 : 2015 HOUSEHOLD ELECTRICAL APPLIANCES - PERFORMANCE - WATER FOR TESTING
    EN ISO 15175 : 2011 SOIL QUALITY - CHARACTERIZATION OF SOIL RELATED TO GROUNDWATER PROTECTION
    DIN EN ISO 5667-3:2013-03 WATER QUALITY - SAMPLING - PART 3: PRESERVATION AND HANDLING OF WATER SAMPLES (ISO 5667-3:2012)
    EN ISO 5667-3:2012 WATER QUALITY - SAMPLING - PART 3: PRESERVATION AND HANDLING OF WATER SAMPLES (ISO 5667-3:2012)
    BS EN ISO 15175:2011 (published 2011-08) Soil quality. Characterization of soil related to groundwater protection
    NF EN ISO 15175 : 2011 SOIL QUALITY - CHARACTERIZATION OF SOIL RELATED TO GROUNDWATER PROTECTION
    I.S. EN 60734:2012 HOUSEHOLD ELECTRICAL APPLIANCES - PERFORMANCE - WATER FOR TESTING (IEC 60734:2012 (EQV))
    UNI EN 16058 : 2012 INFLUENCE OF METALLIC MATERIALS ON WATER INTENDED FOR HUMAN CONSUMPTION - DYNAMIC RIG TEST FOR ASSESSMENT OF SURFACE COATINGS WITH NICKEL LAYERS - LONG-TERM TEST METHOD
    ISO 17289:2014 Water quality Determination of dissolved oxygen Optical sensor method
    I.S. EN ISO 15091:2012 PAINTS AND VARNISHES - DETERMINATION OF ELECTRICAL CONDUCTIVITY AND RESISTANCE (ISO 15091:2012)
    BS 1427(2009) : 2009 GUIDE TO ON-SITE TEST METHODS FOR THE ANALYSIS OF WATERS
    DIN EN 16058:2012-07 INFLUENCE OF METALLIC MATERIALS ON WATER INTENDED FOR HUMAN CONSUMPTION - DYNAMIC RIG TEST FOR ASSESSMENT OF SURFACE COATINGS WITH NICKEL LAYERS - LONG-TERM TEST METHOD
    BS EN ISO 5667-3:2012 WATER QUALITY - SAMPLING - PART 3: PRESERVATION AND HANDLING OF WATER SAMPLES (ISO 5667-3:2012)
    DIN EN 13038:2012-01 Soil improvers and growing media - Determination of electrical conductivity
    I.S. EN ISO 15175:2011 SOIL QUALITY - CHARACTERIZATION OF SOIL RELATED TO GROUNDWATER PROTECTION
    I.S. EN ISO 5667-3:2012 WATER QUALITY - SAMPLING - PART 3: PRESERVATION AND HANDLING OF WATER SAMPLES (ISO 5667-3:2012)
    EN ISO 15091 : 2012 PAINTS AND VARNISHES - DETERMINATION OF ELECTRICAL CONDUCTIVITY AND RESISTANCE (ISO 15091:2012)
    DIN EN 12953-10:2003-12 SHELL BOILERS - PART 10: REQUIREMENTS FOR BOILER FEEDWATER AND BOILER WATER QUALITY
    DIN EN 14898 E : 2007 WATER CONDITIONING EQUIPMENT INSIDE BUILDINGS - ACTIVE MEDIA FILTERS - REQUIREMENTS FOR PERFORMANCE, SAFETY AND TESTING
    DIN EN 13146-5:2012-06 RAILWAY APPLICATIONS - TRACK - TEST METHODS FOR FASTENING SYSTEMS - PART 5: DETERMINATION OF ELECTRICAL RESISTANCE
    DIN EN 14652 E : 2007 WATER CONDITIONING EQUIPMENT INSIDE BUILDINGS - MEMBRANE SEPARATION DEVICES - REQUIREMENTS FOR PERFORMANCE, SAFETY AND TESTING
    DIN EN 12952-12 E : 2003 WATER-TUBE BOILERS AND AUXILIARY INSTALLATIONS - PART 12: REQUIREMENTS FOR BOILER FEEDWATER AND BOILER WATER QUALITY
    17/30348303 DC : 0 BS EN 17087 - CONSTRUCTION PRODUCTS - ASSESSMENT OF RELEASE OF DANGEROUS SUBSTANCES - PREPARATION OF TEST PORTIONS FROM THE LABORATORY SAMPLE FOR TESTING OF RELEASE AND ANALYSIS OF CONTENT
    BS EN 12953-10:2003 Shell boilers Requirements for feedwater and boiler water quality
    ISO 5814:2012 Water quality Determination of dissolved oxygen Electrochemical probe method
    BS EN 1744-3 : 2002 TESTS FOR CHEMICAL PROPERTIES OF AGGREGATES - PART 3: PREPARATION OF ELUATES BY LEACHING OF AGGREGATES
    BS EN 14095 : 2003 WATER CONDITIONING EQUIPMENT INSIDE BUILDINGS - ELECTROLYTIC TREATMENT SYSTEMS WITH ALUMINIUM ANODES - REQUIREMENTS FOR PERFORMANCE, SAFETY AND TESTING
    UNE-EN 13038:2012 Soil improvers and growing media - Determination of electrical conductivity
    UNE-CEN/TR 16184:2011 IN Characterization of Waste - State-of-the-art document - Analysis of eluates
    UNE-EN 60734:2013 Household electrical appliances - Performance - Water for testing
    UNE-EN 15002:2015 Characterization of waste - Preparation of test portions from the laboratory sample
    BS EN 12952-12:2003 Water-tube boilers and auxiliary installations Requirements for boiler feedwater and boiler water quality
    BS EN 15002:2015 (published 2015-04) Characterization of waste. Preparation of test portions from the laboratory sample
    IEC 62703:2013 Expression of performance of fluorometric oxygen analyzers in liquid media
    UNE-EN 15664-1:2008 Influence of metallic materials on water intended for human consumption - Dynamic rig test for assessment of metal release - Part 1: Design and operation
    13/30291099 DC : 0 BS EN 15002 - CHARACTERIZATION OF WASTE - PREPARATION OF TEST PORTIONS FROM THE LABORATORY SAMPLE
    UNE-EN 13160-3:2017 Leak detection systems - Part 3: Requirements and test/assessment methods for liquid systems for tanks
    BS EN 14652 : 2005 WATER CONDITIONING EQUIPMENT INSIDE BUILDINGS - MEMBRANE SEPARATION DEVICES - REQUIREMENTS FOR PERFORMANCE, SAFETY AND TESTING
    BS EN 14898 : 2006 WATER CONDITIONING EQUIPMENT INSIDE BUILDINGS - ACTIVE MEDIA FILTERS - REQUIREMENTS FOR PERFORMANCE, SAFETY AND TESTING
    IEC 60734:2012 Household electrical appliances - Performance - Water for testing
    BS EN 13146-5 : 2012 RAILWAY APPLICATIONS - TRACK - TEST METHODS FOR FASTENING SYSTEMS - PART 5: DETERMINATION OF ELECTRICAL RESISTANCE
    DIN EN 14944-1:2006-07 Influence of cementitious products on water intended for human consumption - Test methods - Part 1: Influence of factory made cementitious products on organoleptic parameters
    UNE-EN 13146-5:2017 Railway applications - Track - Test methods for fastening systems - Part 5: Determination of electrical resistance. (Consolidated versin)
    DIN EN 12952-12:2003-12 Water-tube boilers and auxiliary installations - Part 12: Requirements for boiler feedwater and boiler water quality; German version EN 12952-12:2003
    DIN EN 15664-1:2014-03 INFLUENCE OF METALLIC MATERIALS ON WATER INTENDED FOR HUMAN CONSUMPTION - DYNAMIC RIG TEST FOR ASSESSMENT OF METAL RELEASE - PART 1: DESIGN AND OPERATION
    I.S. EN 14652:2006 WATER CONDITIONING EQUIPMENT INSIDE BUILDINGS - MEMBRANE SEPARATION DEVICES - REQUIREMENTS FOR PERFORMANCE, SAFETY AND TESTING
    I.S. EN 13146-5:2012 RAILWAY APPLICATIONS - TRACK - TEST METHODS FOR FASTENING SYSTEMS - PART 5: DETERMINATION OF ELECTRICAL RESISTANCE
    I.S. EN 13160-3:2016 LEAK DETECTION SYSTEMS - PART 3: REQUIREMENTS AND TEST/ASSESSMENT METHODS FOR LIQUID SYSTEMS FOR TANKS
    I.S. EN 15002:2015 CHARACTERIZATION OF WASTE - PREPARATION OF TEST PORTIONS FROM THE LABORATORY SAMPLE
    I.S. EN 14898:2006 WATER CONDITIONING EQUIPMENT INSIDE BUILDINGS - ACTIVE MEDIA FILTERS - REQUIREMENTS FOR PERFORMANCE, SAFETY AND TESTING
    EN 12952-12 : 2003 WATER-TUBE BOILERS AND AUXILIARY INSTALLATIONS - PART 12: REQUIREMENTS FOR BOILER FEEDWATER AND BOILER WATER QUALITY
    EN 13160-3:2016 LEAK DETECTION SYSTEMS - PART 3: REQUIREMENTS AND TEST/ASSESSMENT METHODS FOR LIQUID SYSTEMS FOR TANKS
    CEN/TS 16811-3 : 2015 WINTER MAINTENANCE EQUIPMENT - DE-ICING AGENTS - PART 3: OTHER SOLID AND LIQUID DE-ICING AGENTS - REQUIREMENTS AND TEST METHODS
    EN 13038:2011 SOIL IMPROVERS AND GROWING MEDIA - DETERMINATION OF ELECTRICAL CONDUCTIVITY
    CEN/TS 15937 : 2013 SLUDGE, TREATED BIOWASTE AND SOIL - DETERMINATION OF SPECIFIC ELECTRICAL CONDUCTIVITY
    DIN EN 14898:2007-09 WATER CONDITIONING EQUIPMENT INSIDE BUILDINGS - ACTIVE MEDIA FILTERS - REQUIREMENTS FOR PERFORMANCE, SAFETY AND TESTING
    EN 62703 : 2013 EXPRESSION OF PERFORMANCE OF FLUOROMETRIC OXYGEN ANALYZERS IN LIQUID MEDIA
    DIN EN 14652:2007-09 WATER CONDITIONING EQUIPMENT INSIDE BUILDINGS - MEMBRANE SEPARATION DEVICES - REQUIREMENTS FOR PERFORMANCE, SAFETY AND TESTING
    DIN EN ISO 15091:2013-04 PAINTS AND VARNISHES - DETERMINATION OF ELECTRICAL CONDUCTIVITY AND RESISTANCE (ISO 15091:2012)
    EN 16192 : 2011 CHARACTERIZATION OF WASTE - ANALYSIS OF ELUATES
    EN 13146-5:2012/AC:2017 RAILWAY APPLICATIONS - TRACK - TEST METHODS FOR FASTENING SYSTEMS - PART 5: DETERMINATION OF ELECTRICAL RESISTANCE
    EN 60734:2012 HOUSEHOLD ELECTRICAL APPLIANCES - PERFORMANCE - WATER FOR TESTING (IEC 60734:2012)
    EN ISO 5814 : 2012 WATER QUALITY - DETERMINATION OF DISSOLVED OXYGEN - ELECTROCHEMICAL PROBE METHOD (ISO 5814:2012)
    EN 14898:2006+A1:2007 WATER CONDITIONING EQUIPMENT INSIDE BUILDINGS - ACTIVE MEDIA FILTERS - REQUIREMENTS FOR PERFORMANCE, SAFETY AND TESTING
    EN 15002:2015 CHARACTERIZATION OF WASTE - PREPARATION OF TEST PORTIONS FROM THE LABORATORY SAMPLE
    EN 14652:2005+A1:2007 WATER CONDITIONING EQUIPMENT INSIDE BUILDINGS - MEMBRANE SEPARATION DEVICES - REQUIREMENTS FOR PERFORMANCE, SAFETY AND TESTING
    EN 14095:2003 WATER CONDITIONING EQUIPMENT INSIDE BUILDINGS - ELECTROLYTIC TREATMENT SYSTEMS WITH ALUMINIUM ANODES - REQUIREMENTS FOR PERFORMANCE, SAFETY AND TESTING
    EN 15664-1:2008+A1:2013 INFLUENCE OF METALLIC MATERIALS ON WATER INTENDED FOR HUMAN CONSUMPTION - DYNAMIC RIG TEST FOR ASSESSMENT OF METAL RELEASE - PART 1: DESIGN AND OPERATION
    EN 1744-3 : 2002 TESTS FOR CHEMICAL PROPERTIES OF AGGREGATES - PART 3: PREPARATION OF ELUATES BY LEACHING OF AGGREGATES
    EN 16058 : 2012 INFLUENCE OF METALLIC MATERIALS ON WATER INTENDED FOR HUMAN CONSUMPTION - DYNAMIC RIG TEST FOR ASSESSMENT OF SURFACE COATINGS WITH NICKEL LAYERS - LONG-TERM TEST METHOD
    UNI EN 13146-5 : 2012 RAILWAY APPLICATIONS - TRACK - TEST METHODS FOR FASTENING SYSTEMS - PART 5: DETERMINATION OF ELECTRICAL RESISTANCE
    UNI EN 13038 : 2012 SOIL IMPROVERS AND GROWING MEDIA - DETERMINATION OF ELECTRICAL CONDUCTIVITY
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