吸尘器EK1 498-11决议问题请教

GloriaFeng

广东安规检测
有限公司提供：

小型摆管淋雨试验机

IPX5X6X7喷水试验机

1000L恒温恒湿箱

各种试验指现货

可程式恒温恒湿试验箱

水平垂直燃烧机

自动卷线器试验机

耐划痕试验机

各种灯头量规现货

灼热丝试验机现货

GB1002插头量规

IPX1-X7淋雨现货

IEC61347/UL935镇流器热试验箱

灯具防风罩

IK冲击试验机

UL498插头插座量规

VDE0620插头插座量规

稳定性试验台

家电温升测试角

针焰试验机现货

热电偶焊机现货

家电125mm试验指

E12灯头量规

无绳壶无绳电熨斗插拔寿命试验机

IEC60335试验指甲

最近IEC60335-2-2吸尘器刚出现了EK1 498-11决议，里面有几个测试，想请教高手。

5 Z- \; `- g. o5 \8 NAdditional requirement on bursting strength of the filter:
If the machine is provided with a safety switch to protect the motor and the filter system, this switch must be rendered inoperative.  All parts, with the exception of the main filter, can be dried in order to facilitate the flow of the clogging media. All bags and prefilters must be removed from the machine to ensure that the main filter is fully exposed to the clogging media and to the impelling force by covering the intake opening.
- J5 L- ?) m1 @1 J4 c0 G) FBy using the method to measure Pi, as described in DIN EN 60335-2-69, Section 3.1.9, a clogging media (e.g. talcum powder) is vacuumed until 90 % of the maximum differential pressure has been reached. Afterwards, the intake opening of the machine is covered for 5 seconds and then opened for 1 second in order to obtain an impulse effect. The test with pulsating air flow must be repeated 30 times within 3 minutes.
$ V4 E# {9 U8 C* G& hThe main filter may not exhibit any damages (e.g. breaking, loosening, crack formation).
% I0 r* G* O4 L! m: `
% P0 f6 P8 L9 C1 ^
这个应该是使用堵塞物（如滑石粉）使器具的压力达到最大差动压力的90％，然后通过密封进气口5s、放开１s的方法来获得脉冲效果30次。但是我不知道怎样使压力打到90％，具体怎么操作，压力怎么测？