UL 920004-2017 UL Standard for Safety Performance Requirements for Open Path Toxic Gas Detectors (First Edition Reprint with revisions through and including October 13 2017).pdf

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1、 UL 920004 STANDARD FOR SAFETY Performance Requirements for Open Path Toxic Gas Detectors FOR UL INTERNAL REFERENCE OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTIONThis page intentionally left blank. FOR UL INTERNAL REFERENCE OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTIONUL Standard for Safety for Perfo

2、rmance Requirements for Open Path Toxic Gas Detectors, UL 920004 First Edition, Dated August 15, 2014 Summary of Topics Adoption of ANSI/ISA-92.00.04-2014, Standard for Performance Requirements for Open Path Toxic Gas Detectors as ANSI/UL 920004. This Standard is being issued to update the title pag

3、e to reflect the reaffirmation of its ANSI approval. No changes in requirements have been made. As noted in the Commitment of Amendments statement located on the back side of the title page, UL and ISA are committed to updating this co-designated standard jointly after processing according to the st

4、andards development procedures by UL Please note that as this is a simple reaffirmation of an existing ISA standard. These requirements are substantially in accordance with Proposal(s) on this subject dated August 11, 2017. All rights reserved. No part of this publication may be reproduced, stored i

5、n a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standard “as is“ without warranty of any kind, either expressed or implied, including but not limited to, the implied warrantie

6、s of merchantability or fitne ss for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of profits, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even i

7、f UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend,

8、indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation introduced wh ile purchaser is storing an electronic Standard on the purchasers computer system. FOR UL INTERNAL REFER

9、ENCE OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTIONThis page intentionally left blank. FOR UL INTERNAL REFERENCE OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTIONISA - International Society of Automation ANSI/ISA-92.00.04-2014 (R2017) First Edition Underwriters Laboratories Inc. ANSI/UL 920004 First Edit

10、ion Performance Requirements for Open Path Toxic Gas Detectors August 15, 2014 (Title Page Reprinted: October 13, 2017) ANSI/ISA/UL 920004-2014 (R2017) FOR UL INTERNAL REFERENCE OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTIONCommitment for Amendments This standard is issued jointly by ISA and Underwri

11、ters Laboratories Incorporated (UL). Comments or proposals for revisions on any part of the standard may be submitted to UL at any time. ISBN 978-1-945541-68-1 Copyright 2017 ISA All rights reserved. Not for resale. Printed in the United States of America. No part of this publication may be reproduc

12、ed, stored in a retrieval system, or transmitted in any form or by any means (electronic mechanical, photocopying, recording, or otherwise), without the prior written permission of the Publisher. The most recent designation of ANSI/ISA-92.00.04 as a Reaffirmed American National Standard (ANSI) occur

13、red on October 13, 2017. Copyright 2017 Underwriters Laboratories Inc. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall rem

14、ain the sole and exclusive property of UL. This ANSI/UL Standard for Safety consists of the First Edition including revisions through October 13, 2017. The most recent designation of ANSI/UL 920004 as a Reaffirmed American National Standard (ANS) occurred on October 13, 2017. ANSI approval for a sta

15、ndard does not include the Cover Page, Transmittal Pages, Title Page, (front and back), or the Preface. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Deve

16、lopment System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of

17、 UL. To purchase UL Standards, visit http:/ or call toll-free 1-888-853-3503 FOR UL INTERNAL REFERENCE OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION1 ANSI/ISA-92.00.04-2014 (R2017) ANSI/UL 920004 October 13, 2017 General Notes This is the common ISA and UL, Standard for the Performance Requirements

18、for Open Path Toxic Gas Detectors. It is the first edition of ANSI/ISA-92.00.04 and the first edition of ANSI/UL 920004. The document is a modification of the ISA document to create the equivalent UL version and maintain the ANSI approval of this standard. ANSI/ISA-92.00.04 and ANSI/UL 920004 contai

19、n identical requirements, and identical publication dates. This common standard was prepared by the (ISA) - The International Society of Automation on August 15, 2014 but is now being maintained by Underwriters Laboratories Inc. (UL). Note: Although the intended primary application of this standard

20、is stated in its scope, it is important to note that it remains the responsibility of the users of the standard to judge its suitability for their particular purpose. FOR UL INTERNAL REFERENCE OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTIONOctober 13, 2017 ANSI/ISA-92.00.04-2014 (R2017) ANSI/UL 920004

21、 2 This page intentionally left blank. FOR UL INTERNAL REFERENCE OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION3 ANSI/ISA-92.00.04-2014 (R2017) ANSI/UL 920004 October 13, 2017 Preface (ISA) This preface, as well as all footnotes and annexes, is included for information purposes and is not part of ANS

22、I/ISA-92.00.04-2014 (R2017). This document has been prepared as part of the service of ISA toward a goal of uniformity in the field of instrumentation. To be of real value, this document should not be static but should be subject to periodic review. The ISA Standards and Practices Department is awar

23、e of the growing need for attention to the metric system of units in general, and the International System of Units (SI) in particular, in the preparation of instrumentation standards. The Department is further aware of the benefits to USA users of ISA standards of incorporating suitable references

24、to the SI (and the metric system) in their business and professional dealings with other countries. Toward this end, this Department will endeavour to introduce SI-acceptable metric units in all new and revised standards, recommended practices, and technical reports to the greatest extent possible.

25、Standard for Use of the International System of Units (SI): The Modern Metric System, published by the American Society for Testing 10 ppm.m / 10 meter = 1 ppm. 3.12.5 toxic gas gases that may cause significant acute health effects at low concentrations. Health effect s may include severe skin or ey

26、e irritation, pulmonary edema, neurotoxicity, or other potentially fatal conditions. 3.13 part per million meters (ppm.m) a unit of measurement for the amount of gas present in the beam. The ppm .m represents the length of a gas cloud multiplied by the gas concentration within the cloud. See Figure

27、1.1 of Annex A. FOR UL INTERNAL REFERENCE OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION13 ANSI/ISA-92.00.04-2014 (R2017) ANSI/UL 920004 August 15, 2014 3.14 measurement range the range of measurement of the detector from the lowest indicated reading, usually “the zero point,” to the highest indicate

28、d reading, commonly known as “full scale.” A detector may have multiple measurement ranges and some means of selecting the desired range of measurement. 3.15 optical equipment 3.15.1 gas cell a sealed enclosure with transparent ends which can be filled with test gases 3.15.2 open path the path taken

29、 by the optical radiation from the transmitter to the receiver as it traverses an atmosphere through which gases are free to move 3.15.3 optical radiation energy emitted by the transmitter in the form of electromagnetic radiation within a specific region or regions of the electromagnetic spectrum, f

30、or example ultra-violet, visible, or infrared light 3.15.4 receiver an assembly in which the optical detecting element(s) are housed and which may contain associated optical and electrical components 3.15.5 reflector a device that returns or reflects light 3.15.6 transceiver an assembly in which the

31、 optical detecting element(s) and optical source(s) are housed and which may contain associated optical and electrical components 3.15.7 transmitter an assembly in which the optical source(s) are housed and which may contain associated optical and electrical components 3.16 optical axis median line

32、of the optical path 3.17 response conversion data information, supplied and explained in the gas detection equipment instruction manual, enabling the equipment user to determine the concentration of the gas to be detected that will produce the same response as a known concentration of another gas us

33、ed for calibration FOR UL INTERNAL REFERENCE OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTIONAugust 15, 2014 ANSI/ISA-92.00.04-2014 (R2017) ANSI/UL 920004 14 3.18 signals and indications 3.18.1 fault signal an audible, visual, or other type of output which provides, directly or indirectly, a warning or

34、 indication that the equipment has been compromised 3.18.2 beam blocked signal an audible, visual or other type of output which provides, directly or indirectly, a warning or indication that the optical path is obscured or that the signal detected is too weak to enable the equipment to function norm

35、ally 3.18.3 inhibition signal an audible, visual, or other type of output which provides, directly or indirectly, a warning or indication that normal operation has been suspended 3.18.4 indicating devices means for displaying values or states in analog or digital form 3.19 time of response, tx time

36、interval, with the equipment stabilized, between the time when an instantaneous variation in the integral concentration is produced in the optical path and the time when the indication reaches a stated percentage (x) of its final value 3.20 trouble signal information that alerts an apparatus user to

37、 abnormal conditions 3.21 span the algebraic difference between the upper and lower values of a range 3.22 special state state of the equipment other than those in which monitoring of gas concentration takes place NOTE For example, warm-up, calibration mode or fault condition. 3.23 stand-alone contr

38、ol unit control unit that receives a corresponding relay or signal from stand-alone gas detector(s) and is intended to provide meter indication, alarm functions, and/or output contacts 3.24 stand-alone detector a combination transmitter and receiver either integral or remote that produce a relay or

39、signal to be utilized by an unspecified control equipment. Such equipment is intended to be interfaced to a separate control unit, signal processing data acquisition, central monitoring, or other similar systems in which the equipment provides a conditioned electronic signal or output indication to

40、systems of the aforementioned type that typically process information from various locat ions and sources including, but not limited to, gas detection equipment. FOR UL INTERNAL REFERENCE OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTION15 ANSI/ISA-92.00.04-2014 (R2017) ANSI/UL 920004 August 15, 2014 3.

41、25 stationary equipment a gas detection equipment intended for permanent installation in a fixed location 3.26 transportable equipment equipment which is not intended to be portable, but which can be moved from one place to another and used after alignment 3.27 zero point the lower calibration value

42、, normally clean air 4 General requirements 4.1 Introduction 4.1.1 Where an equipment manufacturer makes any claims regarding any special features of construction or superior performance that exceed these minimum requirements, all such claims shall be verified and the test procedures shall be extend

43、ed or supplemented where necessary to verify the claimed performance. 4.1.2 Electrical assemblies and components shall comply with the construction and performance requirements of 4.4 and Clause 5, where applicable. In addition, parts of the equipment intended for use in hazardous (classified) locat

44、ions shall employ materials and comply to the construction and explosion protection as specified in the appropriate standards. 4.2 Markings 4.2.1 Marking on the product or, if not possible due to size, on its packaging or label accompanying the product, shall include the following information: a) Ma

45、nufacturers name or trademark and address b) Specific model designation and serial number c) Year of construction (may be encoded within the serial number) d) Equipment ratings (voltage, frequency, current or power, etc.) e) Equipment operating ambient temperature range f) “ISA-92.00.04” 4.2.2 The m

46、odel or type identification shall correspond to the manufacturers catalog designation and shall uniquely identify the product. 4.2.3 The marking required in 4.2.4 shall appear legibly and indelibly on each gas detection equipment in the following manner, as applicable: a) For stationary equipment, t

47、he marking required in 4.2.4 shall appear in a location where it will be visible after installation and in direct sight during the routine periodic re -calibration and adjustment of set point(s). For modular control units comprising one or more control modules in a common enclosure or mounting assem

48、bly, the marking need not be repeated on each module, but may appear as a single marking on the common portion of the assembly. FOR UL INTERNAL REFERENCE OR CSDS USE ONLY NOT FOR OUTSIDE DISTRIBUTIONAugust 15, 2014 ANSI/ISA-92.00.04-2014 (R2017) ANSI/UL 920004 16 Where the design of a stationary con

49、trol unit is such that there is insufficient space for this marking to appear on the portion of the unit that is visible after installation (e.g., compact designs for close panel mounting), the marking required by 4.2.4 is permitted to appear elsewhere on the control unit, provided that a second duplicate label (with an acceptable adhesive) bearing such marking is supplied with each such control unit (or assembly of control units), together with the instructions that it is to be attached