电弧焊接用设备和相关技术 - 用在仪器上的信号灯和图形符号

3. 图形符号的使用

3.1 图形符号的位置

为了使图形符号不干扰已识别设备机构的确认，最好把图形符号放于机构下方，或者紧挨着机构左边放置，或者放置机构中间的偏下方。

如果涉及到 2 个位置的转换器，比如接通或断开一功能回路，应该在转换器两个位置尽端附近对应每个位置放置一个代表其功能的图形符号。

3.2 复杂功能循环焊接设备

复杂功能循环焊接设备中，仅仅使用图形符号即不充分或者也很难解释。

这种情况，制造商会在设备循环功能控制罩壳上分别表示出不同循环阶段对应的调节机构和控制结构，用数字表明不同循环阶段（例如 图 1）。

3.3 有自定义的符号

这些符号用来识别一项功能的调节机构或者控制机构，或者指明所识别机构对应的是哪个功能或哪个回路。它们也可以确定一机构的位置。

这样，比如，符号 61（保险丝），单独使用，对机器保险丝盒进行定位（用回路符号来辨别每个保险丝）；当被放在灯筒旁边时，它可以表示信号灯（可熔保险丝）（用相应的回路符号来识别每个信号灯）。

3.4 图形符号的组合

需要明确指出组合了 2 个或者很多个符号的图形符号的含义。

示例：符号 59（接入）和符号 53（水冷却）组合代表的是被识别机构是冷却水回路的入口或者冷却水到达回路的一个部件。

图 2 接入冷却水的示例

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SOMMAIRE

TABLE DES MATIÈRES

:current

Foreword

This document (EN 10216-3:2002) has been prepared by Technical Committee EC/TC 29, "Steel tubes and fittings for steel tubes", 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of an identical text or by endorsement, at the latest by November 2002, and conflicting national standards shall be withdrawn at the latest by November 2002.

This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s).

For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.

Other Parts of EN 10216 are:

Another European Standard series covering tubes for pressure purposes is:

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.

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ISO 657-1 : 1988 (E)

Table 1 — Dimensions and sectional properties of hot-rolled equal-leg angles (concluded)

NOTES

1. Member countries may choose, to be included in their national standards, the sizes which are required to meet their demand.
2. For the angles so chosen, only thicknesses which can be rolled in their mills to meet the demand of the users may be selected from the list of thicknesses corresponding to equal angles in table 1.
3. The sectional area has been calculated using the formula

   S = [l/2 A - l) + 0,214 6 (r_root² - 2r_toe²)] × 1/100

   where
   

   S is the sectional area, in square centimetres;
   

   l is the thickness, in millimetres;
   

   r_root is the root radius, in millimetres;
   

   r_toe is the toe radius, in millimetres;
   

   A is the leg length, in millimetres.

4. Mass is calculated on the basis of density of steel of 7,85 kg/dm³.

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