EN 13183-3:2005

SLOVENSKI STANDARD
01-september-2005
Delež vlage v žaganem lesu – 3. del: Ocena z metodo kapacitivnosti
Moisture content of a piece of sawn timber - Part 3: Estimation by capacitance method
Feuchtegehalt eines Stückes Schnittholz - Teil 3: Schätzung durch kapazitives
Messverfahren
Teneur en humidité d'une piece de bois scié - Partie 3: Estimation par méthode
capacitive
Ta slovenski standard je istoveten z: EN 13183-3:2005
ICS:
79.040 Les, hlodovina in žagan les Wood, sawlogs and sawn
timber
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 13183-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2005
ICS 79.040
English version
Moisture content of a piece of sawn timber - Part 3: Estimation
by capacitance method
Teneur en humidité d'une pièce de bois scié - Partie 3: Feuchtegehalt eines Stückes Schnittholz - Teil 3:
Estimation par méthode capacitive Schätzung durch kapazitives Messverfahren
This European Standard was approved by CEN on 3 February 2005.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 13183-3:2005: E
worldwide for CEN national Members.

Contents Page
Foreword.3
1 Scope .4
2 Normative references .4
3 Terms and definitions .4
4 Moisture content estimation with hand-held capacitance moisture meters .4
4.1 Limits of application.4
4.2 Apparatus .5
4.3 Initial type testing .5
4.4 Procedure .5
4.5 Expression of results .5
5 Moisture content estimation with in-line capacitance moisture meters.5
5.1 Limits of application.5
5.2 Apparatus and measuring set-up.6
5.3 Initial type testing .6
5.4 Calibration .6
5.5 Procedure .6
5.6 Expression of results .6
Annex A (normative) Procedure for assessing the accuracy of capacitance moisture meters.7
Annex B (informative) Moisture content of a lot .9
Bibliography .10

Foreword
This document (EN 13183-3:2005) has been prepared by Technical Committee CEN/TC 175 “Round and
sawn timber”, the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by September 2005, and conflicting national standards shall be
withdrawn at the latest by September 2005.
This document is one of a series, dealing with methods of measurement for round timber and sawn timber.
Other standards in this series are:
EN 13183-1, Moisture content of a piece of sawn timber - Part 1: Determination by oven dry method
EN 13183-2, Moisture content of a piece of sawn timber - Part 2: Estimation by electrical resistance method
EN 1309-1, Round and sawn timber - Method of measurement of dimensions - Part 1: Sawn timber
EN 1310, Round and sawn timber - Method of measurement of features
EN 1311, Round and sawn timber - Method of measurement of biological degrade
This document includes a Bibliography.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and United Kingdom.
1 Scope
This document specifies a non destructive method for estimating the moisture content of a piece of sawn
timber. The standard describes the conditions which shall be met by a capacitance measuring system to
derive a moisture content estimate for individual pieces of timber.
The standard applies to sawn timber and timber which has been planed or surfaced by other means.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 844-1:1995, Round and sawn timber - Terminology - Part 1: General terms common to round timber and
sawn timber
EN 844-3:1995, Round and sawn timber - Terminology - Part 3: General terms relating to sawn timber
EN 844-4:1997, Round and sawn timber –Terminology - Part 4: Terms relating to moisture content
EN 844-6:1997, Round and sawn timber - Terminology - Part 6: Terms relating to dimensions of sawn timber
EN 844-7:1997, Round and sawn timber - Terminology - Part 7: Terms relating to anatomical structure of
timber
EN 844-9:1997, Round and sawn timber - Terminology - Part 9: Terms relating to features of sawn timber
EN 844-12:2000, Round and sawn timber - Terminology - Part 12: Additional terms and general index
EN 13183-1, Moisture content of a piece of sawn timber - Part 1: Determination by oven dry method
EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories (ISO/IEC
17025:1999)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 844-1:1995,
EN 844-3:1995, EN 844-4:1997, EN 844-6:1997, EN 844-7:1997, EN 844-9:1997 and EN 844-12:2000 apply.
4 Moisture content estimation with hand-held capacitance moisture meters
4.1 Limits of application
This method is suitable for estimating the average moisture content of a piece of timber having a moisture
content between approximately 7 % and 30 %.
NOTE Any type of bipolar preservative, flame retardant, chemical or surface treatment may affect the accuracy of the
measurement and requires special calibration of the instrument for each type of treatment.
The estimated moisture content can be strongly affected by the type and reach of the moisture sensing system, the
moisture content distribution and the wood density under the sensor, the operating modus, the dimensions of the piece of
timber to be measured and the operator skills.
Any air gap between the timber surface and the sensing unit will strongly influence the reading. Very rough sawn or
uneven surfaces can only be measured if the shape of the condensator plate or probe secures good contact.
4.2 Apparatus
Hand-held capacitance moisture meter equipped with a flat shaped condensator plate surface, surface spring
electrode
...