Doug, the triangle is intended for a "warning" sign and is specified in ISO 3864. The circle has the meaning of "prohibition or mandatory action," and the rectangle is for "information including instructions." The diagonal line in a circle is at 45 degrees. The standard covers all aspects of the design of these symbols. Richard Woods Sensormatic Electronics Tyco International
-----Original Message----- From: POWELL, DOUG [mailto:[email protected]] Sent: Monday, May 12, 2003 7:53 PM To: EMC-PSTC (E-mail) Subject: Use of a triangle on warning labels Hello group, It has become apparent to me that various standards require triangles at times when others do not. For example, IEC 61010-1 Table 1 only indicates 3 symbols that have the triangle enclosing the symbol. While, IEC 60417 does not indicate this. One that seems to be missing from IEC 61010-1 is the exclamation point in triangle. I've reviewed IEC 60204-1, EN50178, EN60950 as well and I find varying requirements, some more than others. SEMI S2 seems to indicate that nearly every symbol belongs in a triangle. I'm guessing that if it is an informational symbol, you do not use the triangle, but countering this, I have seen the hearing protection warning in a circle without the triangle. Does anyone know of a reliable rule-of-thumb for when to use a triangle on an IEC/ISO international warning symbol? By the way, here's a trivia question to which I do know the answer: On the circle-bar label warning, which angle does the slash take, from 10:00 to 4:00 or from 2:00 to 8:00 on the clock face? thanks, -doug Douglas E. Powell Regulatory Compliance Engineer Advanced Energy Industries, Inc. Fort Collins, CO 80535 USA _______________________________________________________________ This message, including any attachments, may contain information that is confidential and proprietary information of Advanced Energy Industries, Inc. The dissemination, distribution, use or copying of this message or any of its attachments is strictly prohibited without the express written consent of Advanced Energy Industries, Inc.
