L88 其他电子仪器设备 标准查询与下载



共找到 31 条与 其他电子仪器设备 相关的标准,共 3

本标准规定了组成滤波器组或谱分析仪的模拟的、取样数据和数字方法得到的带通滤波器的性能要求和测试方法。对于给定带宽的所有滤波器,由滤波器的相对衰减特性确定的通带范围是中心频率的恒定的百分数。符合本标准要求的仪器可以包含覆盖任何所需频率范围的任何数目的带通滤波器。 本标准给出了三种等级的滤波器,0级,1级和2级的性能要求,其允差随等级的增加而增加。 符合本标准性能要求的带通滤波器可以是各种测量系统中的一部分或某一定仪器中的一个完整部件,并可实时工作。 符合本标准要求的仪器,对于各种信号,例如,时变的、间歇的和稳态的信号;宽带的和离散的频率,以及持续时间长的和短的信号,能够提供经频带滤波的谱的信息。满足本标准要求的不同实现方式的滤波器,在涉及到瞬态信号的应用中可能会给出不同的结果。

Octave-band and fractional-octave-band filters

ICS
33.140
CCS
L88
发布
1998-04-10
实施
1998-12-01

本标准描述测量频率计权及时间平均声压级所用的仪器。该类仪器也可以具备测量声暴露级的功能,本标准符合IEC651《声级计》中的有关要求。且规定了为测量稳态声、断续声、波动声和脉冲声的等效连续声压级Leq所必需的附加特性。 注:测量等效连续声压级和声暴露级所用仪器的标准化,不意味着这些测量结果完全表征了声音对人的心理和生理的影响。该仪器称为“积分平均声级计”,也可简称“积分声级计”或“平均声级计”。本标准中使用“积分声级计”。 本标准虽然对完整的积分声级计进行了规定,但符合IEC651的常规声级计与能提供平均能力的附件或插件的组合只要满足本标准也是允许的。 积分声级计中的时间平均特性与常规声级计的时间平均特性有某些重大的差别,详见附录A(提示的附录)。 本标准规定了四种准确度等级的积分声级计,定为0,1,2和3型。对每种型号的积分声级计,其指向特性、频率计权及放大器特性的规范等同于IEC651。平均特性和指示器特性不同于IEC651,应注意2型和3型声级计的规范是相同的。 若积分声级计上有“R”标记,则表明该积分声级计为扩散场校准(见2.3.3及9.1)。

Integrating-averaging sound level meters

ICS
33.140
CCS
L88
发布
1997-12-25
实施
1998-08-01

本标准适用于广播、扩声、录音及家庭娱乐等设备中使用的音频峰值节目电平表。

Peak programme level meters

ICS
33.140
CCS
L88
发布
1997-12-25
实施
1998-08-01

Recommendation ITU-T P.834 gives a methodology for deriving equipment impairment factors (Ies)for digital signal processing devices, namely low bit-rate codecs.The Ie values are intended to be used as an input to the E-model (see Recommendation ITU-T G.107).The methodology specified in this Recommendation makes use of instrumental models (so-called"objective methods"),e.g.,of the model defined in Recommendation ITU-T P.862.It is to be considered as supplementary to the methodology based on auditory listening only tests,described in Recommendation ITU-T P.833.It will provide valid Ie values only for those codecs for which the used instrumental model produces meaningful estimations.This Recommendation includes an electronic attachment containing speech material.

Methodology for the derivation of equipment impairment factors from instrumental models (Study Group 12)

ICS
CCS
L88
发布
2015-06-01
实施

ERRATUM

ICS
CCS
L88
发布
2010-01-12
实施

This Standard specifies the requirements and the testing methods of the electronic counter(hereafter referred to as "counter")used in the control circuit for industrial use of AC 250V or under at 50Hz and/or 60Hz in frequency, or of DC 250V or under.

Electronic counter for industrial use

ICS
17.220.20;25.040.40
CCS
L88
发布
2009-12-21
实施

本规范规定了绝缘电阻测试仪的要求、试验方法、检验规则、包装、标志、运输和贮存。 本规范适用于交流电网或电池供电的、额定输出电压不高于 1OKV 的指针式指示和数字式指示的绝缘电阻测试仪(以下简称“测试仪”),以及安全性能综合测试仪和耐压绝缘测试仪的绝缘电阻部分。 本规范不适用于高绝缘电阻测试仪(高阻计)。

General specification of insulation resistance tester

ICS
17.220
CCS
L88
发布
2008-03-10
实施
2008-03-10

本规范规定了泄漏电流测试仪的要求、试验方法、检验规则、包装、标志、运输和贮存。 本规范适用于泄漏电流测试仪(以下简称“测试仪”)、接触电流测试仪,以及安全性能综合测试仪的泄漏电流部分。

General specification of leakage current tester

ICS
17.220
CCS
L88
发布
2008-03-10
实施
2008-03-10

本规范规定了耐压测试仪的要求、试验方法、检验规则、包装、标志、运输和贮存。 本规范适用于额定输出电压不高于 15kV 的耐压测试仪(以下简称“测试仪”),包括数字式及模拟式交流(工频)、直流耐压测试仪,以及安全性能综合测试仪和耐压绝缘测试仪的耐压部分。

General specification of withstanding voltage tester

ICS
17.220
CCS
L88
发布
2008-03-10
实施
2008-03-10

本规范规定了接地导通电阻测试仪的要求、试验方法、检验规则、包装、标志、运输和贮存。 本规范适用于接地导通电阻测试仪(以下简称“测试仪”),以及安全性能综合测试仪的接地导通电阻部分。

General specification of earth coninuity tester

ICS
17.220
CCS
L88
发布
2008-03-10
实施
2008-03-10

The typical use of surface mount devices (SMD) involves subjecting the SMDs to elevated temperatures during board assembly, which combined with moisture in the package can induce internal package damage that could be a reliability concern. Preconditioning of SMD packages is used to simulate the effects of board assembly on moisturized packages, prior to reliability testing. This allows reliability testing at the component level on as shippable products with a board assembly simulation. During preconditioning, test samples are subjected to temperature cycling (optional), dry bake, moisture soaking, solder reflow simulation, flux, rinse, dry, and electrical test before reliability testing.

Preconditioning of Nonhermetic Surface Mount Devices Prior to Reliability Testing

ICS
CCS
L88
发布
2006-03-01
实施

An FMEA is an anticipatory thought process designed to utilize as much knowledge and experience of an organization as possible toward the end of addressing potential issues defined in a new project. The objective is to reduce the probability that a customer is exposed to a potential product and or process problem by performing a thorough risk analysis.

Potential Failure Mode and Effects Analysis (FMEA)

ICS
CCS
L88
发布
2005-05-01
实施

MIL-HDBK-683, dated 23 November 1993, has been reviewed and determined to be valid for use in acquisition

STATISTICAL PROCESS CONTROL (SPC) IMPLEMENTATION AND EVALUATION AID

ICS
CCS
L88
发布
2004-04-13
实施

この規格は,音響及び振動の周波数分析に用いるオクターブ及び1/3オクタープバンド分析器(1)(以下,分析器という。)について規定する。分析器は,クラス1及び2に分類し,そのフィルタの性能については,JIS C 1514の該当する規定に従う。注(1)原則として指示器を備えることとし,騒音計,振動レべル計などに内蔵又は外付されるフィルタについても,この規格を適用することができる。分析器には,オクタープ及び1/3オクターブパンドフィルタの両方を備えてもよく,いずれか一方を備えてもよい。また,1 /3オクターブノぐンドフィルタ以外の1/Nオクターブパンドフィルタを備えてもよい。その場合のフィルタ特性についてぱ. JIS C 1514を適用する。

Octave-band and third-octave-band analyzers for sounds and vibrations

ICS
17.140.01
CCS
L88
发布
2002-07-20
实施

1.1 This specification covers electrical insulation monitoring devices, intended as permanently installed units, for use in the detection of ohmic insulation faults to ground in active, ac ungrounded electrical systems.1.2 Limitations8212;This specification does not cover devices which are not intended for operation for: dc ungrounded systems or ac ungrounded systems with dc components unless ac to dc conversion is isolated from the monitored system with transformers.1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.1.4 The following precautionary caveat pertains only to the test methods portion, Section 9, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Standard Specification for Electrical Insulation Monitors for Monitoring Ground Resistance in Active Electrical Systems [Metric]

ICS
17.220.20 (Measurement of electrical and magnetic
CCS
L88
发布
1996
实施

1.1 This specification covers electrical insulation monitoring devices, intended as permanently installed units, for use in the detection of ohmic insulation faults to ground in active, ac ungrounded electrical systems. 1.2 Limitations -This specification does not cover devices which are not intended for operation for: dc ungrounded systems or ac ungrounded systems with dc components unless ac to dc conversion is isolated from the monitored system with transformers. 1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.4 The following precautionary caveat pertains only to the test methods portion, Section 9, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Standard Specification for Electrical Insulation Monitors for Monitoring Ground Resistance in Active Electrical Systems [Metric]

ICS
CCS
L88
发布
1996
实施

1.1 This specification covers electrical insulation monitoring devices, intended as permanently installed units, for use in the detection of ohmic insulation faults to ground in active, ac ungrounded electrical systems.1.2 Limitations - This specification does not cover devices which are not intended for operation for: dc ungrounded systems or ac ungrounded systems with dc components unless ac to dc conversion is isolated from the monitored system with transformers.1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.The following precautionary caveat pertains only to the test methods portion, Section 9, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Standard Specification for Electrical Insulation Monitors for Monitoring Ground Resistance in Active Electrical Systems [Metric]

ICS
29.080.10 (Insulators)
CCS
L88
发布
1996
实施

This handbook establishes the guidelines for developing and implementing a practical SPC system by the contractor and provides the criteria for reviewing contractor SPC systems and evaluating

STATISTICAL PROCESS CONTROL (SPC) IMPLEMENTATION AND EVALUATION AID

ICS
CCS
L88
发布
1993
实施

Flickermeter; functional and design specifications (IEC 868:1986 + A1:1990)

ICS
CCS
L88
发布
1992-09
实施

Flickermeter; part 0: evaluation of flicker severity (IEC 868-0:1991)

ICS
CCS
L88
发布
1992-05
实施



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