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常見問題
HEGO報警通常表示加濕超溫報警。當濕度發熱管超出設定的溫
濕度傳感器通常會被包裹在紗布中，主要是為了提高濕度的準確性
濕球紗布一定要上端掛在濕球傳感器上，下端放入濕球紗布水槽內
EN 1822-3-2009
文章出處：原創
編輯：環儀
發表時間：2017-03-31
National foreword
This British Standard is the UK implementation of EN 1822-3:2009. It
supersedes BS EN 1822-3:1998 which is withdrawn.
The UK participation in its preparation was entrusted to Technical
Committee MCE/21/3, Air filters other than for air supply for L.C.
engines and compressors.
A list of organizations represented on this committee can be obtained on
request to its secretary.
This publication does not purport to include all the necessary provisions
of a contract. Users are responsible for its correct application.
Compliance with a British Standard cannot confer immunity
from legal obligations.
Foreword
This document (EN 1822-3:2009) has been prepared by Technical Comittee CENTC 195“Air ftlrs for
general air cleaning ". the secretariat of which is held by UNI. .
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 May 2010. and conflicting national standards shall be withdrawn at the
latest by May 2010.
Attention is drawn to the possiblity that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 1822-3:1998.
It is dealing with the performance testing of eficient particulate air fiters (EPA). high eficiency particulate air
filters (HEPA) and ultra low penetration air flters (ULPA).
The series of standards EN 1822, High eficiency air fiters (EPA, HEPA and ULPA) consists of the fllowing
parts:
-Part 1: Classifcatin, performance testing, marking
-Part 2: Aerosol productin, measuring equipment, particle counting statistics
-Part 3: Testing flat sheet filter media
Part 4.: Determining leakage of fiter elements (scan method)
-Part 5: Determining the fficiency of fiter elements
As decided by CENTC 195, this European Standard is based on particle counting methods which actually
cover most needs of different applications. The dfference between this European Standard and previous
national standards lies in the technique used for the determination of the integral efficiency. Instead of mass
relationships, this new technique is based on particle counting at the most penetrating particle size (MPPS;
range: 0,12 um to 0,25 um). It also allows ultra low penetration air fiters to be tested, which is not possible
with the previous test methods because of their inadequate sensitivity.
According to the CEN/CENELEC Intemal Regulations, the national standards organizations of the ollowing
countries are bound to implement this European Standard: Austia, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
/uploads/files/EN%201822-3-2009.pdfEN 1822-3-2009
[上一篇: GB 18191-2008包裝容器 危險品包裝用塑料桶] [下一篇: EN 1822-2:2009中文版]
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