EN 55014-1 标准解读2

4.2.2.3 The click limit Lq applies for click rates N determined under operating conditions and interpretation of results as specified in Clause 7.

4.2.2.3说的是click率N的计算方法，在标准第七章中，会针对具体的产品计算，会详细说明EUT的操作状态，会在后续章节详细说明。

4.2.3 Exceptions from the click definition
Under certain conditions some kinds of discontinuous disturbances are exempted from the definition of a click (see 3.2).
This subclause contains these exceptions which are applicable in combination with subclauses 4.2.1 and 4.2.2 to all kinds of appliances. In Figure 9, a flow diagram shows how to take these conditions into account in the verification procedure.
Product specific relaxations are contained in Annex A, which contains also Table A.2, a list of appliances for which the switching operations are counted, to derive the click rate N.

4.2.3条款讲述的是不符合click定义的情况。

该条款的例外情况，是和前面的4.2.1和4.2.2放在一起考虑的。下图是测试click的流程图。

Click 测试流程图

在上图的流程图中，4.2.3.1、4.2.3.2、4.2.3.3、4.2.3.4描述了四种例外的情况，并将这四种情况融入到了测试流程的选择中，下面将具体描述下这四种情况。

4.2.3.1 Individual switching operations
The disturbance from individual switching operations, caused directly or indirectly, manually or by similar activities on a switch or a control which is included in an appliance or otherwise to be used for:
a) the purpose of mains connection or disconnection only;
b) the purpose of programme selection only;
c) the control of energy or speed by switching between a limited number of fixed positions;
d) the changing of the manual setting of a continuously adjustable control such as a
variable speed device for water extraction or electronic thermostats, is to be disregarded for the purpose of testing the appliance for compliance with the limits of radio disturbance set out in this standard.
Examples of switches included in this subclause are the on/off switches for apparatus (including foot activated), for instance the switch for an electric typewriter, manual switches for heat and air flow control in fan heaters and hair dryers, as well as the indirectly operated
switch in a cupboard, wardrobe or refrigerator, and sensor-operated switches, etc. Switches which usually will be repeatedly operated are not included in this subclause, e.g. for sewing machines, calculating machines, soldering equipment, etc. (see 7.2.3. and 7.3.2.4.c).
Also the disturbance caused by the operation of any switching device or control which is included in an appliance for the purpose of mains disconnection for safety only, is to be disregarded for the purpose of testing the appliance for compliance with the limits of radio
disturbance as described in this standard.

4.2.3.1 Individual switching operations：单次开关操作
该条款中描述的单次开关操作。主要有四种情况
1、接通或断开电源的开关操作。比如说，普通的电热水壶的按钮，按下则接通加热，水沸腾后，则自动断开电源，停止加热。
此种情况下的温控器是不需要测试click项目的。
2、程序选择的开关操作。比如说，吸油烟机中的低档分量和高档风量的选择，这种选择具有一次性，直到发生下次人为的选择。
3、能量或者速度控制开关。不如说电吹风的风量或热量选择的开关，这种动作频率非常低。也不需要测试click。
4、脱水的变速装置或电子温控器的可连续调节控制器的人工设置的变化，比如说热水器的连续温度调节旋钮，也不需要测试click。

符合本条的开关的例子是器具（包括用脚启动）的开/关，例如电动打字机的开关、热风机和吹风机的加热和气流控制的人工开关以及碗柜、衣柜或者冰箱的间接操作开关盒感应操作开关灯。经常重复操作的开关不包括在内，如缝纫机、计算机、焊接设备的开关等。

通过操作在装置内为了安全地切断电源用的任何开关装置或控制器而引起的骚扰，从实验器具符合本标准射频骚扰限值的目的出发是可以忽略的。

比如说：安规中要求电吹风出风口被堵时，出风口的材料不能起火，因为客户为了达到这个要求，常常在电吹风中加入一个自复位温控器，当出风口的温度达到设定的温度后，切断电路，停止工作，这在安规中属于非正常操作，是为了安全起见。因此，即使该产品中有温控器，则也不需要测试click项目，因为这是非正常工作状态。