1、 ANSI/ISA92.04.01, Part I2007 (R2013) Formerly ISA92.04.01, Part I1996 Performance Requirements for Instruments Used to Detect Oxygen-Deficient/ Oxygen-Enriched AtmospheresApproved 31 January 2013AMERICAN NATIONAL STANDARDCopyright 2013 by ISA. All rights reserved. Printed in the UnitedStates of Ame
2、rica. No part of this publication may be reproduced, stored in a retrieval system, ortransmitted in any form or by any means (electronic, mechanical, photocopying, recording, orotherwise), without the prior written permission of the publisher.ISA67 Alexander DriveP.O. Box 12277Research Triangle Park
3、, North Carolina 27709ANSI/ISA-92.04.01, Part I-2007 (R2013), Performance Requirements for Instruments Used To Detect Oxygen-Deficient/Oxygen-Enriched AtmospheresISBN: 978-1-937560-95-9- 3 - ANSI/ISA-92.04.01, Part I-2007 (R2013) Preface This preface, all footnotes, and annexes are included for info
4、rmational purposes and are not a part of ANSI/ISA-92.04.01, Part I-2007 (R2013). This Standard has been prepared as a 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 revi
5、ew. Toward this end, the Society welcomes all comments and criticisms and asks that they be addressed to the Standards and Practices Board Secretary; ISA; 67 Alexander Drive; P. O. Box 12277; Research Triangle Park, NC 27709; Telephone (919) 549-8411; Fax (919) 549-8288; Internet: standardsisa.org.
6、The ISA Standards and Practices Department is aware 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 I
7、SA standards of incorporating suitable references 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 t
8、echnical reports to the greatest extent possible. IEEE/ASTM SI 10, American National Standard for Metric Practice, and future revisions, will be the reference guide for definitions, symbols, abbreviations, and conversion factors. It is the policy of ISA to encourage and welcome the participation of
9、all concerned individuals and interests in the development of ISA standards, recommended practices, and technical reports. Participation in the ISA standards-making process by an individual in no way constitutes endorsement by the employer of that individual, of ISA, or of any of the standards that
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15、CUMENT NOTIFY THE ISA STANDARDS AND PRACTICES DEPARTMENT OF THE PATENT AND ITS OWNER.ANSI/ISA-92.04.01, Part I-2007 (R2013) - 4 - ADDITIONALLY, THE USE OF THIS DOCUMENT MAY INVOLVE HAZARDOUS MATERIALS, OPERATIONS OR EQUIPMENT. THE DOCUMENT CANNOT ANTICIPATE ALL POSSIBLE APPLICATIONS OR ADDRESS ALL P
16、OSSIBLE SAFETY ISSUES ASSOCIATED WITH USE IN HAZARDOUS CONDITIONS. THE USER OF THIS DOCUMENT MUST EXERCISE SOUND PROFESSIONAL JUDGMENT CONCERNING ITS USE AND APPLICABILITY UNDER THE USERS PARTICULAR CIRCUMSTANCES. THE USER MUST ALSO CONSIDER THE APPLICABILITY OF ANY GOVERNMENTAL REGULATORY LIMITATIO
17、NS AND ESTABLISHED SAFETY AND HEALTH PRACTICES BEFORE IMPLEMENTING THIS DOCUMENT. THE USER OF THIS DOCUMENT SHOULD BE AWARE THAT THIS DOCUMENT MAY BE IMPACTED BY ELECTRONIC SECURITY ISSUES. THE COMMITTEE HAS NOT YET ADDRESSED THE POTENTIAL ISSUES IN THIS VERSION. This standard was originally publish
18、ed as ANSI/ISA-92.04.01, Part I-1996. In 2007, the standard was reaffirmed but had passed the 10-year ANSI approval period and, therefore, was approved by ANSI as a new standard, ANSI/ISA-92.04.01, Part I-2007. The following members of ISA92 approved this document. NAME COMPANY J. Miller, Chairman D
19、etector Electronics Corporation R. Seitz, Vice Chairman Artech Engineering M. Coppler, Managing Director Ametek Inc. C. Brown Enmet Corporation P. Byrne FM Approvals B. Henderson Chevron USA Inc. R. Masi Detcon Inc. D. Mills Underwriters Laboratories Inc. A. Spataru Adept Group Inc. J. Thomason Omni
20、 Industrial Systems Inc. This document was approved by the ISA Standards and Practices Board on 15 November 2007. NAME COMPANY T. McAvinew, Vice President Jacobs Engineering Group M. Coppler Ametek Inc. E. Cosman The Dow Chemical Company B. Dumortier Schneider Electric D. Dunn Aramco Services Compan
21、y J. Gilsinn NIST/MEL W. Holland Consultant E. Icayan ACES Inc. J. Jamison Jamison however, they are physiologically equivalent at one normal atmosphere. (See Clause 3, Normal atmosphere.) The normal atmosphere is composed approximately of 20.9 percent oxygen (21.2 kPa)(3.07 psia), 78.1 percent nitr
22、ogen (79.1 kPa)(11.5 psia), and 1 percent argon (1.01 kPa)(.146 psia) by volume with small amounts of other gases. Reference: National Institute for Occupational Safety and Health, (NIOSH), Pub. No. 80-106.1.2 This Standard applies to mains-connected instruments rated at 250 V nominal or less, and t
23、o portable, mobile, and stationary battery-powered instruments.1.3 This Standard applies to instruments suitable for use in an ambient temperature range of at least -10C to 50C (+14F to +122F ).1.4 This Standard applies to instruments providing at least one range that includes 15 to 20.9 (15.2 to 21
24、.2 kPa)(2.20 to 3.07 psia) or 20.9 to 25.0 (21.2 to 25.3 kPa)(3.07 to 3.63 psia) volume percent oxygen at one normal atmosphere. Hereafter, the volume percentage of oxygen at one normal atmosphere will be expressed as “percent oxygen.“1.5 This Standard applies to instruments that provide at least on
25、e oxygen-deficient alarm that cannot be adjusted below 18 percent (18.2 kPa)(2.64 psia) oxygen or at least one oxygen-enrichment alarm that cannot be adjusted above 25 percent (25.3 kPa)(3.67 psia) oxygen.1.6 For instruments with multiple ranges, this Standard does not apply to any range that does n
26、ot include normal atmospheric oxygen pressure (20.9 percent oxygen or 21.2 kPa3.07 psia at one normal atmosphere).1.7 This Standard does not apply to oxygen-monitoring instruments of the laboratory or scientific type, which are used for analysis or measurement in process control and process-monitori
27、ng applications or instruments with full-scale oxygen concentrations less than 15 percent (15.2 kPa)(2.20 psia) or greater than 30 percent (30.4 kPa)(4.41 psia) oxygen.NOTE The user should specify instrumentation that will provide a higher level of accuracy than the minimum tolerances of this Standa
28、rd if required by the application risk.1.8 The user should be aware of the effects of altitude and barometric pressure on both the instrument and the user. The effects are not intended to be evaluated by this performance Standard.12 ANSI/ISA-92.04.01, Part I-2007 (R2013)2 Purpose2.1 This Standard pr
29、ovides minimum performance requirements of electrical instruments for the determination of oxygen (O2) content in air in order to enhance the safety of personnel.2.2 ISA-RP92.04.02, Part II, the companion recommended practice to this Standard, establishes user criteria for the installation, operatio
30、n, and maintenance of oxygen-monitoring instrumentation.3 Definitions and terminologyFor the purposes of this Standard, the following definitions apply:3.1 alarm: An audible, visual, or physical presentation designed to alert the instrument user that a specific level of oxygen has been detected.3.2
31、alarm-only instrument: An instrument that provides an alarm(s) but does not have an integral display device indicating a specific oxygen level.3.3 alarm setpoint: The selected oxygen level(s) at which an alarm(s) is activated.3.4 ambient air: Air to which the sensing element is normally exposed.3.5
32、calibration: The procedure to adjust the instrument for proper response (e.g., reference, normal level, span, or alarm).3.6 calibration gas: A gas mixture with a known oxygen content, used to set the instrument span or alarm level(s), including, but not limited to, ambient air.3.7 clean air: Air tha
33、t is free of any substance that will adversely affect the operation or cause a response of the instrument.3.8 consumables: Those materials or components that are depleted or require periodic replacement through normal use of the instrument.3.9 control unit: That portion of a multi-part oxygen-monito
34、ring instrument that is not directly responsive to oxygen, but responds to the electrical signal obtained from one or more detector heads to produce an indication, alarm, or other output function.3.10 detector head: The oxygen-responsive portion of an oxygen-monitoring instrument located in the area
35、 where sensing the presence of oxygen is desired. Its location may be integral to or remote from its control unit.NOTE The detector head may incorporate the oxygen-sensing element and additional circuitry such as signal processing or amplifying components or circuits.ANSI/ISA-92.04.01, Part I-2007 (
36、R2013) 133.11 diffusion: A process by which the atmosphere being monitored is transported by natural random molecular movement to and from the oxygen-sensing element.3.12 mobile instrument: A continuous-monitoring instrument mounted on a vehicle such as, but not limited to, a mining machine or indus
37、trial truck.3.13 nominal voltage: The voltage given by manufacturers as the recommended operating voltage of their oxygen-monitoring instruments. If a range (versus a specific voltage) is given, the nominal voltage shall be considered as the midpoint of the range, unless otherwise specified.3.14 nor
38、mal atmosphere: The pressure exerted by a vertical column of 76 cm of mercury of density 13.5951 g/cm3at a place where the gravitational acceleration, g, is 980.665 cm/sec2.1 Atmosphere = 1.01325 x 106 dyne/cm2 (exactly) or= 101.325 kPa (kilopascals exactly)= 760.00 mm of Hg= 14.696 psia= 29.921 in.
39、 of Hg at 0C (32F)All of the preceding units are referenced at 0C (32F). (Reference: Handbook of Chemistry and Physics, 76 edition 1995-96, CRC Press, Inc., Boca Raton, Florida.)3.15 oxygen: Interchangeable within this document for “O2“ or “oxygen gas.“3.16 oxygen deficiency: A significant reduction
40、 in oxygen content of an atmosphere from that of the surrounding ambient air.3.17 oxygen enrichment: An increase in oxygen content of an atmosphere from that of the surrounding ambient air.3.18 oxygen-monitoring instrument: An assembly of electrical, mechanical, and chemical components that senses a
41、nd reports the content of oxygen in air.NOTE For convenience, the term “instrument“ is used as an abbreviation for “oxygen-monitoring instrument“ within this Standard.3.19 oxygen-sensing element: The particular subassembly in the oxygen-monitoring instrument that, in the presence of oxygen, produces
42、 a corresponding electrical, chemical, or physical characteristic(s).3.20 portable instrument: An instrument that is self-contained, battery-operated, transportable, and can be carried by an individual.NOTE This type of instrument is intended to operate continuously for 8 hours or more. 3.21 range:
43、The percentage or pressure of oxygen over which accuracy is ensured by calibration.3.22 sample draw: A method of gas sampling that causes deliberate flow of the atmosphere being monitored to an oxygen-sensing element.14 ANSI/ISA-92.04.01, Part I-2007 (R2013)3.23 signal-processing detector head: An i
44、nstrument intended to be incorporated with separate signal processing, data acquisition, central monitoring, or other similar systems in which the instrument provides a conditioned electronic signal or output indication to systems of the aforementioned type, which typically process information from
45、various locations and sources including, but not limited to, gas detection instruments.3.24 span: The algebraic difference between the upper and lower values of a range.3.25 stationary instrument: An oxygen-monitoring instrument intended for permanent installation in a fixed location.3.26 test gas:
46、A gas containing a percentage of oxygen known to within 0.25 percent in nitrogen or other inert gas(es) at one normal atmosphere at reference temperature.3.27 trouble signal: A signal (contact transfer or signal visible or audible) that alerts an instrument user of abnormal conditions such as input
47、power failure, an open circuit breaker, a blown fuse, loss of continuity to the detector head, defective oxygen-sensing element, or significant downscale indication.4 General requirements4.1 Oxygen-monitoring instruments shall meet the applicable electrical and electronic measuring instrument safety
48、 requirement of ANSI/ISA-61010-1 (82.02.01). (See Annex A.)4.2 Any portion of a stationary oxygen-monitoring instrument and all portable instruments that are intended for installation or use in a hazardous (classified) location shall be suitable for use in the location. (See NFPA 70, Articles 500-50
49、4.)NOTE Oxygen enrichment presents increased ignition risk, especially in a hazardous (classified) location. This Standard should not be interpreted as suggesting that these instruments may be used routinely in oxygen-enriched atmospheres.4.3 All oxygen-monitoring instruments shall meet the minimum construction and test requirements contained in this Standard. If the manufacturer makes perfo
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