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1、? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? CONFIRMED DECEMBER 2007 Licensed Copy: Oxford Brookes ATHENS, Oxford Brookes University, 19/04/2009 16:29, Uncontrolled Copy, (c) BSI ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
2、? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
3、? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Licensed Copy: Oxford Brookes ATHENS, Oxford Brookes University, 19/04/2009 16:29, Unc
4、ontrolled Copy, (c) BSI EUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN13183-2 April 2002 ICS 79.040incorporating corrigendum September 2003 English version Moisture content of a piece of sawn timber - Part 2: Estimation by electrical resistance method Teneur en humidit dune pice de bois sci - Par
5、tie 2: Estimation par mthode lectrique par rsistance Feuchtegehalt eines Stckes Schnittholz - Teil 2: Schtzung durch elektrisches Widerstands-Messverfahren This European Standard was approved by CEN on 29 December 2001. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
6、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 Management Centre or to any CEN member. This European Standard
7、 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 Management Centre has the same status as the official versions. CEN members are the national standards
8、bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE F
9、R NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2002 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13183-2:2002 E Licensed Copy: Oxford Brookes ATHENS, Oxford Brookes University, 19/04/2009 16:29, Uncontrolled Cop
10、y, (c) BSI EN 13183-2:2002 (E) 2 Contents page 1SCOPE3 2NORMATIVE REFERENCES3 3TERMS AND DEFINITIONS4 4LIMITS OF APPLICATION4 5APPARATUS4 6COMPLIANCE4 7PROCEDURE4 8EXPRESSION OF RESULTS5 ANNEX A (INFORMATIVE) MOISTURE CONTENT OF A LOT6 Licensed Copy: Oxford Brookes ATHENS, Oxford Brookes University,
11、 19/04/2009 16:29, Uncontrolled Copy, (c) BSI w w w . b z f x w . c o m EN 13183-2:2002 (E) 3 Foreword This document EN 13183-2 has been prepared by 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,
12、 either by publication of an identical text or by endorsement, at the latest by October 2002, and conflicting national standards shall be withdrawn at the latest by October 2002. This standard is one of a series, dealing with methods of measurement for round timber and sawn timber. Other standards i
13、n this series are: EN 13183-1:Moisture content of a piece of sawn timber ? ? 1: Determination by oven dry 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 tim
14、ber - Method of measurement of biological degrade. Annex A is informative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Ger
15、many, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. 1Scope This European Standard defines a non-destructive method for estimating the moisture content of a piece of sawn timber using an electrical resistance mois
16、ture meter. This standard applies to sawn timber, and timber which has been planed or mechanically surfaced by other means. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the approp
17、riate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication r
18、eferred to applies (including amendments). EN 844-1,Round and sawn timber - Terminology - Part 1: General terms common to round timber and sawn timber. Licensed Copy: Oxford Brookes ATHENS, Oxford Brookes University, 19/04/2009 16:29, Uncontrolled Copy, (c) BSI w w w . b z f x w . c o m EN 13183-2:2
19、002 (E) 4 EN 844-3,Round and sawn timber - Terminology - Part 3: General terms relating to sawn timber. EN 844-4,Round and sawn timber - Terminology - Part 4: Terms relating to moisture content. EN 844-6,Round and sawn timber - Terminology - Part 6: Terms relating to dimensions of sawn timber. EN 84
20、4-7,Round and sawn timber - Terminology - Part 7: Terms relating to anatomical structure of timber. EN 844-9,Round and sawn timber - Terminology - Part 9: Terms relating to features of sawn timber. EN 844-12,Round and sawn timber - Terminology - Part 12: Additional terms and general index. 3 Terms a
21、nd definitions For the purposes of this European Standard, the terms and definitions of EN 844-1, EN 844-3, EN 844-4, EN 844-6, EN 844-7, EN 844- 9 and EN 844-12 apply. 4Limits of application This method is suitable for timber having a moisture content between approximately 7 % and 30 %. Some types
22、of preservative, flame retardant, heat or chemical treatments will affect the accuracy of the measurement and require special calibration of the instrument for each type of treatment. 5Apparatus Electrical resistance moisture meter equipped with insulated electrodes, graduated up to 30 % in units of
23、 maximum 1 % moisture content. The meter shall be equipped with settings or tables to correct for wood species and temperature. 6 Compliance Before taking measurements the electrical resistance moisture meter shall be checked according to the instructions provided by the supplier of the instrument.
24、NOTE For checking the accuracy of the instrument, resistance check boxes are available. 7 Procedure Use the following procedure for estimating the moisture content of individual pieces included in lots or consignments. Correct the electrical resistance moisture meter reading to take into considerati
25、on the temperature and species of the timber being measured. Licensed Copy: Oxford Brookes ATHENS, Oxford Brookes University, 19/04/2009 16:29, Uncontrolled Copy, (c) BSI w w w . b z f x w . c o m EN 13183-2:2002 (E) 5 Normally take the measurement in the direction of the grain. Take the measurement
26、 at right gnat selo the gri niaf llaicepsy reqtseuet ni dhm ealaun for ttsni ehrumtne. esuaceB fo the strong effetco sf rusfeca motsiure tnoctne v elbissop dnaaritafo snoi motsiure tnoctne t nirc ehsso tces,noi talusni esuetcele drtiw sedomadnu hgatalusni dei.no rDvit ertcele ehtni sedoo eno faec of
27、 the a ta ,eceip tniop at saelt 003 mm from tiereh dne of teceip eh (or ta teh mio tniop df ssel seceip tnah 006 mm nolg) dna tsid a taanec of 0,t 3imes tw ehitdh frmo eno dege, os taht the itps of hte elecrtodes teneprate to tped ao hf ,03 times tht ehkcino ssef th( eceip esgiF eeure 1). Teh mrusae
28、metne raae llahs eb frf eermo renis wdoo f dnaetaruse rab sa hcusk, kntor dna senis copkets. fI f hcusetaruse xetsi, take the merusametne t tahraen eraelc tse rat aeowardt shtnec ere of t.eceip eh Take the regnida after ti alpsid neeb sahyf deor s 2 to 3 .s Dimensions in millimetres Key 1Hammer elec
29、trode 2 Face 3 Edge t thickness w weidth Figure 1 - Place of measurement 8Expression of results Express the estimated moisture content reading at least to the nearest whole percentage point. Normally take the measurement in the direction of the grain. Take the measurement at right angles to the grai
30、n if specially requested in the manual for the instrument. Because of the strong effects of surface moisture content and possible variations of moisture content in the cross section, use insulated electrodes with undamaged insulation. Drive the electrodes into one face of the piece, at a point at le
31、ast 300 mm from either end of the piece (or at the mid point of pieces less than 600 mm long) and at a distance of 0,3 times the width from one edge, so that the tips of the electrodes penetrate to a depth of 0,3 times the thickness of the piece (see Figure 1). The measurement area shall be free fro
32、m resin wood and features such as bark, knots and resin pockets. If such features exist, take the measurement at the nearest clear area towards the centre of the piece. Take the reading after it has been displayed for 2 s to 3 s. ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
33、? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
34、? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?
35、? ? ? ? ? ? ? ? ? Licensed Copy: Oxford Brookes ATHENS, Oxford Brookes University, 19/04/2009 16:29, Uncontrolled Copy, (c) BSI w w w . b z f x w . c o m EN 13183-2:2002 (E) 6 Annex A (informative) Moisture content of a lot Increasing the number of measurements taken on individual test pieces does n
36、ot increase significantly the accuracy of the result when estimating the moisture content of a lot or consignment. If necessary, for example when estimating the moisture content of a single test piece, or estimating the moisture content of a lot, sampling and testing frequencies should comply with t
37、hose given in Table A.1. Table A.1 Sampling and testing frequencies Number of tested piecesNumber of measurements per test piece (Note) 13 23 32 42 52 51 NOTEMeasurements should be taken at random along the length excluding 300 mm at each end (or at the mid point of pieces less than 600 mm long). Al
38、l results of measurement should be noted. The individual test results should be recorded together with at least the following: specification of the lot of timber (number, internal coding, supplier, customer, etc), species, dimensions, date, type of instrument used, species setting, temperature setti
39、ng, penetration depth. Licensed Copy: Oxford Brookes ATHENS, Oxford Brookes University, 19/04/2009 16:29, Uncontrolled Copy, (c) BSI w w w . b z f x w . c o m blank Licensed Copy: Oxford Brookes ATHENS, Oxford Brookes University, 19/04/2009 16:29, Uncontrolled Copy, (c) BSI w w w . b z f x w . c o m ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?