Helium leak detector MDHJ-L004 - copy

◎技术参数Technical parameter

◎性能介绍Performance description

* MDHJ-L004系列检漏仪是一款全自动移动式氦质谱检漏仪，静音轮设计，适用于众多条件苛刻行业。

*运用了氦质谱分析和逆扩散原理,采用了180°非均匀磁场和全自动控制技术.实现了自动氦峰扫描、自动校准和自动量程切换。

*具有启动时间短，运算速度快、检测灵敏度高、抗干扰能力强等特点。

* MDHJ-L004 series leak detector is a fully automatic mobile helium mass spectrum leak detector, mute wheel design, suitable for many harsh vacuum industry.

*Using helium mass spectrometry and inverse diffusion principle, using 180° inhomogeneous magnetic field and automatic control technology. Automatic helum peak scanning, automatic calibration and automatic range switching are realized.

*lt has the characteristics of short start time, fast operation speed, high detection sensitvity and strong anti-interference ability.

◎性能特点Performance characteristics

*独特的气路设计，可避免粉尘进入仪器内部。

*多模式功能输入、输出，轻松连接各种自动化设备。

*双铱带离子源，抗氧化能力强且使用寿命长。

*机械与电路有效分开，避免了温度、电磁场等彼此干扰，使检漏仪运行更加稳定、可靠。

*诺益APP:使用手机APP远程超控检漏仪开始、停止、调零。实时监控检漏仪显示漏率。

*Unique gas path design, can avoid dust into the instrument interior

*Multi-mode function input, output, easy to connect a variety of automation equipment

*Double iridium ion source,strong antioxidant capacity and long service life

*The machine is effectively separated from the circut, avoiding the interference of temperature, electromagnetic field and so on.which makes the leak detector run more stable and reliable

*APP;use mobile phone APP remote over-control leak detector to start, stop, zero. Real-time monitoring leak detectorshows leakage rate.

MDHJ-L006系列配置表Configuration table

检漏方法

◎负压法（喷吹法)Negative pressure method

对被检产品内部，密封室抽真空

在被检产品外表面，可疑漏点施氦气

检漏仪检测工件内部的氦含量是否有变化

可以实现漏孔的精确定位

Vacuum the sealed chamber inside the inspected product

Apply helium gas on the outer surface of the product under inspection

Leak detector detects changes in helium content inside the workpiece

The precise location of the leak can be realized

◎正压法（吸枪法)Positive pressure method

对被检产品内部，密封室充入一定压力的氦气

被检件有漏孔时，氦气就会通过漏孔泄露的周围大气环境中

采用吸枪法检测被检产品，周围大气中的氦气浓度增量

可以实现漏孔的精确定位

The sealed chamber is filled with helium under certain pressure

When a leak occurs,helium leaks through the leak through the surrounding atmosphere

Detection of helium concentration increments in surrounding atmosphere by suctionmethod The precise location of the leak can be realized

◎背压法（压氦、清氦、检漏）Back pressure method

将被检产品置于一定压力的氦气室中，放置一定时间

再取出，将表面的残余氦气清除一定时间

将被检产品放入与检漏仪相连的检漏罐内检漏;

检测一定时间，取最大漏率值

Place the inspected product in a pressurized helium chamber for a certain period of time

Remove the residual helium from the surface

Put the inspected product into the leak detector connected with the leak detector;

Take the maximum leakage rate for a certain time

喷氦法检漏流程

◎喷氦法法检测标准:

QJ3123-2000《氦质谱真空检漏方法》、

GB/T 15823-2009《氦泄漏检验》

◆将工件组装好后,再使用相应的工装，将工件连接到检漏仪上。

◆待确认连接OK后，按下检漏仪“开始”按键，检漏仪进入抽空检漏状态。

◆观察检漏仪显示屏上的显示的本底值达到4.0×10-1pa - m3/s.

◆使用99.99%或99.999%的氦气，对工件可疑漏点，进行喷氦检测。

◆每个可疑漏点,喷氦1秒,观察检漏仪本底值3-5秒。观察检漏仪本底值有没有增加或检漏仪是否有报警输出。

◆按照步骤5依次检测其它可疑漏点。

◆喷氦气检测顺序是从上而下，先确认大漏点，

◆检测结束后，先按下检漏仪“停止”按键，待检漏仪显示屏出现待机画面后，再拆卸工件。

吸枪法检漏流程

◎吸枪法检测标准:

QJ3089-1999《氦质谱正压检漏方法》、

QJ2862-1996《压力容器焊缝氦质谱吸枪罩盒检漏试验方法》

◆将工件组装好后，再使用相应的工装，将工件内充入一定压力99.99%或99.999%的氦气。

◆待确认OK后，将吸枪连接到检漏仪的检漏口上。按下检漏仪“开始”按键，检漏仪进入抽空检漏状态。

◆观察检漏仪显示屏上的显示的本底值达到5.0x10-Pa·m/s左右.相对稳定状态。

◆使用的氮气，对工件可疑漏点，进行探氦检测。采用吸枪从下往上，距被检件表面1-3mm，移动速度不大于10mm/s进行检测，检测被检产品周围大气环境中的氦气浓度增量。

◆按照步骤4依次检测其它可疑漏点。

◆先确认大漏点,处理好后，再检测小漏点

◆检测结束后，先按下检漏仪“停止”按键，待检漏仪显示屏出现待机画面后，再拆卸吸枪。

Helium injection leak detection process

◎Test standard for helium injection method：

QJ3123-2000《氦质谱真空检漏方法》、

GB/T 15823-2009《氦泄漏检验》

◆After the workpiece is assembled, use the corresponding tooling to connect the workpiece to the leak detector.

◆After confirming that the connection is OK, press the "start" button of the leak detector, and the leak detector enters the evacuation leak detection state.

◆Observe that the background value displayed on the display screen of the leak detector reaches 4.0 × 10-10Pa·m3/s.

◆Use 99.99% or 99.999% helium to detect the suspected leakage point of the workpiece.

◆For each suspicious leak point, spray helium for 1 second and observe the background value of the leak detector for 3-5 seconds. Observe whether the background value of the leak detector increases or whether the leak detector has alarm output.

◆Detect other suspicious leakage points in sequence according to step 5.

◆The detection sequence of helium injection is from top to bottom, and the large leakage point is confirmed first,

◆After the test, press the "stop" button of the leak detector first, and then disassemble the workpiece after the standby screen appears on the display screen of the leak detector.

Leak detection process by suction gun (probe) method

◎Test standard of suction gun method：

QJ3089-1999《氦质谱正压检漏方法》、

QJ2862-1996《压力容器焊缝氦质谱吸枪罩盒检漏试验方法》

◆After the workpiece is assembled, use the corresponding tooling to fill the workpiece with 99.99% or 99.999% helium at a certain pressure.

◆After confirming OK, connect the suction gun to the leak detection port of the leak detector. Press the "start" button of the leak detector, and the leak detector enters the evacuation leak detection state.

◆Observe that the background value displayed on the display of the leak detector reaches about 5.0×10-8Pa·m3/s. It is relatively stable.

◆Use helium gas to detect suspected leaks on the workpiece. Use a sniffer to detect from bottom to top, 1-3mm from the surface of the inspected part, with a moving speed not greater than 10mm/s, to detect the increase in helium concentration in the atmosphere surrounding the inspected product.

◆Follow step 4 to detect other suspicious points in turn.

◆Confirm the big leaks first, and then check the small leaks after handling them

◆After the test is over, first press the "Stop" button of the leak detector, and then disassemble the sniffer after the standby screen appears on the leak detector's display screen.