1、 AMERICAN NATIONAL STANDARD ANSI/ISA-92.00.04-2014 Performance Requirements for Open Path Toxic Gas Detectors Approved 8 September 2014 ANSI/ISA-92.00.04-2014 Performance Requirements for Open Path Toxic Gas Detectors ISBN: 978-0-876640-97-5 Copyright 2014 by ISA. All rights reserved. Not for resale
2、. Printed in the United States of America. No part of this publication may be reproduced, 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. ISA 67 Alexander D
3、rive P.O. Box 12277 Research Triangle Park, North Carolina 27709 - 3 - ANSI/ISA-92.00.04-2014 Preface This preface, as well as all footnotes and annexes, is included for information purposes and is not part of ANSI/ISA-92.00.04-2014. This document has been prepared as part of the service of ISA towa
4、rd 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. Toward this end, the Society welcomes all comments and criticisms and asks that they be addressed to the Secretary, Standards and Practices Board
5、; ISA; 67 Alexander Drive; P. O. Box 12277; Research Triangle Park, NC 27709; Telephone (919) 549-8411; Fax (919) 549-8288; E-mail: standardsisa.org. 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
6、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 to the SI (and the metric system) in their business and professional dealings with other countries.
7、Toward this end, this Department will endeavor to introduce SI-acceptable metric units in all new and revised standards, recommended practices, and technical reports to the greatest extent possible. IEEE/ASTM SI 10, American National Standard for Metric Practice, and future revisions, will be the re
8、ference guide for definitions, symbols, abbreviations, and conversion factors. It is the policy of ISA to encourage and welcome the participation of all concerned individuals and interests in the development of ISA standards, recommended practices, and technical reports. Participation in the ISA sta
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15、014 - 4 - ADDITIONALLY, THE USE OF THIS DOCUMENT MAY INVOLVE HAZARDOUS MATERIALS, OPERATIONS OR EQUIPMENT. THE DOCUMENT CANNOT ANTICIPATE ALL POSSIBLE APPLICATIONS OR ADDRESS ALL POSSIBLE SAFETY ISSUES ASSOCIATED WITH USE IN HAZARDOUS CONDITIONS. THE USER OF THIS DOCUMENT MUST EXERCISE SOUND PROFESS
16、IONAL JUDGMENT CONCERNING ITS USE AND APPLICABILITY UNDER THE USERS PARTICULAR CIRCUMSTANCES. THE USER MUST ALSO CONSIDER THE APPLICABILITY OF ANY GOVERNMENTAL REGULATORY LIMITATIONS AND ESTABLISHED SAFETY AND HEALTH PRACTICES BEFORE IMPLEMENTING THIS DOCUMENT. The following people served as members
17、 of ISA Subcommittee ISA92. NAME COMPANY J. Miller, Chair Detector Electronics Corporation R. Seitz, Vice Chair Artech Engineering M. Coppler, Managing Director Det Norske Veritas Certification Inc. S. Baliga General Monitors W. Bennett Mine Safety Appliances Co. T. Crawford Intertek Testing Service
18、s G. Garcha GE Power 10 ppm.m / 10 meter = 1 ppm. 3.12.5 toxic gas gases that may cause significant acute health effects at low concentrations. Health effects may include severe skin or eye irritation, pulmonary edema, neurotoxicity, or other potentially fatal conditions. 3.13 part per million meter
19、s (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 1.1 of Annex A. ANSI/ISA-92.00.04-2014 - 12 - 3.14 measurement range the range of measurement of the detector fr
20、om the lowest indicated reading, usually “the zero point,” to the highest indicated 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 tr
21、ansparent ends which can be filled with test gases 3.15.2 open path the path taken 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 electromagneti
22、c radiation within a specific region or regions of the electromagnetic spectrum, for 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
23、 device that returns or reflects light 3.15.6 transceiver an assembly in which the 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 c
24、ontain associated optical and electrical components 3.16 optical axis median line 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 detec
25、ted that will produce the same response as a known concentration of another gas used for calibration - 13 - ANSI/ISA-92.00.04-2014 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 indication that the equ
26、ipment 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 normally 3.18.3 inhibition s
27、ignal 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 interval, with the equip
28、ment 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 abnormal conditions 3.2
29、1 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 control unit control unit tha
30、t 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 signal to be utilized by
31、 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 systems of the aforement
32、ioned type that typically process information from various locations and sources including, but not limited to, gas detection equipment. ANSI/ISA-92.00.04-2014 - 14 - 3.25 stationary equipment a gas detection equipment intended for permanent installation in a fixed location 3.26 transportable equipm
33、ent 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, normally clean air 4 General requirements 4.1 Introduction 4.1.1 Where an equipment manufacturer makes any claims regarding any s
34、pecial features of construction or superior performance that exceed these minimum requirements, all such claims shall be verified and the test procedures shall be extended or supplemented where necessary to verify the claimed performance. 4.1.2 Electrical assemblies and components shall comply with
35、the construction and perfor mance requirements of 4.4 and Clause 5, where applicable. In addition, parts of the equipment intended for use in hazardous (classified) locations shall employ materials and comp ly to the construction and explosion protection as specified in the appropriate standards. 4.
36、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) Manufacturers name or trademark and address b) Specific model designation and serial number c) Year of construction (may be encoded
37、 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 model or type identification shall correspond to the manufacturers catalog designation and shall uniquely identify the product. 4.
38、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, the marking required in 4.2.4 shall appear in a location where it will be visible after installation and in direct sight during th
39、e 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 assembly, the marking need not be repeated on each module, but may appear as a single marking on the common portion of the assembly. Wh
40、ere the design of a stationary control 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 contro
41、l 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 - 15 - ANSI/ISA-92.00.04-2014 units), together with the instructions that it is to be attached by the user in a conspicuous location after
42、 installation, as close as possible to the control unit. 4.2.4 All open path gas detection equipment shall be marked: CAUTION READ AND UNDERSTAND INSTRUCTION MANUAL BEFORE OPERATING OR SERVICING. The word CAUTION of the foregoing shall be in capital letters at least 3.0 mm high. The balance of the w
43、ording shall be in capital letters at least 2.5 mm high. 4.2.5 Where the design of special features of the equipment requires additional markings or a change in marking requirements, the additions or revisions are allowed, but the safety and instructional intent of this section shall be met. 4.3 Man
44、ufacturers installation and operation manuals 4.3.1 Each gas detection equipment shall be provided with an instruction manual, furnished by the manufacturer. The requirements of 4.3.2 through 4.3.5 shall be included as applicable. Instructions shall be consistent with the markings required in 4.2. 4
45、.3.2 The following shall be incorporated in the manufacturers instruction and operation manuals: 1) Installation instructions. 2) Operating instructions including initial start-up and alignment. 3) Maintenance instructions. 4) Troubleshooting guide including a list of all fault indications. 5) Certi
46、fication information as applicable. 6) Consideration of known conditions that may impair the reliability of the open path gas detection equipment. 7) Optional accessories (e.g., aperture, weather-protecting devices) and state their effects on the instrument. 8) Details of any special conditions of s
47、ervice. 9) List of available gas calibrations with corresponding accuracy and t 90 response time. 10) For a stand alone open path gas detector or a stand alone control unit the following note shall be provided: “The t90 response time of the stand alone open path gas detector and the stand alone cont
48、rol unit shall be added together and shall not exceed 10 seconds.” 11) Electromagnetic compatibility. 4.3.3 Details of operational limitations, including, where applicable, the following: 1) Gases for which the equipment is suitable and the relative sensitivities of the instrument to these gases. 2)
49、 Information that describes the sensitivities to other gases to which the equipment is responsive. 3) Temperature limits. 4) Humidity ranges. 5) Supply voltage limits. 6) Inrush and normal operating currents. ANSI/ISA-92.00.04-2014 - 16 - 7) Relevant characteristics and construction details of required interconnecting cables including maximum cable length, loop resistance, minimum conductor size for wiring between the control unit, transmitter, receiver and any conductor shielding requirements . 8) Pressure limits. 9) Warm-up time. 10) Stabilization time. 11) Minimum and m
