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說明：參考塊類型1是剩余磁化的金屬圓盤，通過一個特殊的地方，造成治療，粗，細裂縫網絡已經產生了
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MTU-3參考試塊MTU磁粉試塊（MTU-3,ENISO9934-2:2002）GB/T15822.2
說明：
參考塊類型1（MTU Nr.3）
說明：
參考塊類型1是剩余磁化的金屬圓盤，通過一個特殊的地方，造成治療，粗，細裂縫網絡已經產生了。磁場參考塊在這些裂縫產生的雜散不同強度通量。更敏感檢查媒體結果在一個更明顯的跡象表明，相比跡象時低靈敏度。*鉆孔更容易處理。
使用方法：
參考塊類型1根據標準EN ISO9934-2（前說明“MTU試塊”）用于顯示磁粉探傷靈敏度的檢查和監督
代理商。表面的剩余磁化參考塊包含一個網絡和粗細裂縫。與磁粉溶液浸泡或噴涂后，裂紋跡象評估。
應用范圍：
參考塊類型1浸泡或噴灑仔細檢查介質混合。冗余檢查介質應倒掉。然后裂紋跡象都被視為適當的照明條件下。然后，您應該檢查的疲軟跡象，因為這是在粒子敏感度的差異變得明顯。
注意：
參考塊類型1的裂紋跡象可能受到污染，強磁場或機械的影響。給予正確的適應癥，參考塊前應用的污垢，油，油脂和磁性粒子。因此，參考塊，應清洗后，每個應用程序（用濕布擦拭）。參考塊不應暴露在強磁場，如從MP裂紋探測器，磁化和消磁線圈，磁板，等，因為它們可能會影響到剩余場阻止通過改變磁場強度和方向。
Instructions:
Reference Block Type 1 （MTU Nr.3）
Description:
The reference block type 1 is a residually magnetized metal disc, where, caused by a special
treatment, a network of coarse and fine cracks had been generated. The magnetic field of the
reference block generates stray fluxes of different strength across these cracks. More sensitive
inspection media result in a more distinct indications as compared to the indications when lower
sensitivity is used. The central bore hole is made for easier handling.
Use:
The reference block type 1 according to EN ISO 9934-2 （former description "MTU test block"） is
used for checking and supervision of the indication sensitivity of magnetic particle crack detection
agents. The surface of the residually magnetized reference block contains a network of coarse and
fine cracks. After dipping or spraying with the magnetic particle solution, the crack indications are
evaluated.
Application:
The reference block type 1 is immersed or carefully sprayed with the well-mixed inspection medium.
Redundant inspection medium should be drained off. Then the crack indications are to be viewed
under appropriate lighting conditions. You should then inspect the weaker indications as this is
where differences in particle sensitivity becomes obvious.
Note:
The crack indication of the reference block type 1 may be affected by contamination, strong
magnetic fields, or mechanical influences. To give correct indications, the reference block should
be free of dirt, oil, grease and magnetic particles from former applications. Therefore, the reference
block should be cleaned after each application （wipe off with a wet cloth）. The reference block
should not be exposed to strong magnetic fields such as from MP crack detectors, magnetizing and
demagnetizing coils, magnetic holding plates, etc. as they may influence the residual field of the
block by altering the field strength and direction.
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