A must-see for newcomers! Airtightness Tester Complete Operator's Guide: Dry Tips from Beginner to Proficient

In industrial production, the sealing performance of products is directly related to quality and safety.Air tightness testerAs the core equipment for quality control, the accuracy of its operation determines the reliability of the entire production line.

This guide will help youDeeper Understanding of Precision EngineeringAir tightness testing equipmentThe mechanism of work, mastering the skills of quick startand establish a scientific system of quality standards.

I. Core working principle: the physical logic behind pressure changes

The nature of the detection mechanism

Air tightness testerThe core of the work of thePressure monitoring technology. The equipment judges the sealing performance by filling compressed gas inside the product and then monitoring the change rule of pressure.

This process follows a simple and precise physical principle:The pressure should be constant in a completely sealed container. Any drop in pressure means that gas is leaking from somewhere, and the amount of leakage is a direct reflection of the severity of the sealing defect.

Six key stages of the testing process

1. Connection establishment phase

The device establishes an air line connection to the product via a test tube, creating the conditions for subsequent pressure transfer.

2. Inflatable pressurization phase

Fill the product with compressed gas to a preset level oftest pressure. This pressure value is usually determined according to the environment in which the product is used and the sealing and waterproofing requirements.

3. Equilibrium stabilization phase

Stopping inflation allows the system toStabilization of pressures. This stage eliminates the effect of airflow disturbances on measurement accuracy and is a critical part of ensuring detection accuracy.

4. Pressure drop monitoring phase

setdetection timeInside, precision monitoring of pressure changes. The high-precision sensor captures extremely small pressure fluctuations.

5. Data determination phase

Comparing the measured pressure drop value with the presetleakage rateComparisons are made to give a clear determination of pass or fail.

6. Pressure relief reset phase

Remove pressure from the system in preparation for the next test.

Second, quick start operation: systematic setup process

Hardware connection: building a stable detection system

Correct hardware connection is the basis for proper functioning of the device. Connections made in the following order can avoid common installation errors:

Establishment of air circuit system

• Use 8mm air tubing to connect the factory air supply, instrument air inlet, and fixture air inlet.
• Ensure that the air supply pressure is controlled within 0.8 MPa
• Connect one end of the test tube to the test port of the instrument and tighten the nut to prevent leakage.

Electrical system connections

• Connect 220V power cord to ensure stable power supply
• Connect the instrument to the fixture using a 10-pole airline plug communication cable.
• Note the alignment of the dud-proof grooves to ensure a reliable connection

System startup verification
Press the switch at the rear of the instrument and observe the status of the indicator light to confirm that the unit starts normally.

Jingcheng Engineering Gas Tightness InstrumentTutorial (full version available by private message)

Parameter Configuration: Establishing Precise Test Standards

External control settings: the key to automated operation

go intoSystem settings → external control settingsThis is the most overlooked but extremely important aspect of configuration:

Set the two time parameters to0.1 seconds and check the box. This setting determines whether or not the test can be initiated via the fixture switch. Without this setting, only the interface start button can be clicked manually and automation is not possible.

Test Parameter Set Creation

Parameter type	Setting basis	reference value	mechanism of action
front exhaust	Exhausting the air inside the product	2 seconds.	Creating a clean testing environment
test pressure	Product use environment pressure	10 kPa	Simulation of actual operating pressure
Inflation time	Product volume size	10~20 seconds	Ensure that pressure is fully built up
equalization time	System stability requirements	10~20 seconds	Elimination of dynamic interference
detection time	Measurement accuracy requirements	5~10 seconds	Acquisition of stabilized pressure data
Pressure relief time	System reset requirements	2 seconds.	Quick release of residual pressure

Determination of leakage criteria: science-based thresholds for compliance

leakage rateIt cannot be set empirically, but must be determined by actual test data:

Benchmarking

• Selection of 10 samples of good products confirmed to be free of defects
• Perform airtightness tests separately and record pressure drop values
• The maximum voltage drop value is taken as the upper limit of the yield reference.

Comparative verification of defective products

• Producing or selecting samples with obvious defects
• Test its voltage drop value to confirm that it is clearly distinguishable from the good product
• Set the standard value between the maximum value of good products and the minimum value of defective products.

Principles for setting standard values

Leakage standard = Maximum pressure drop of good product × 1.2 ~ 1.5

This setup ensures that both good products pass rate and defective products can be effectively screened out.

III. Troubleshooting: a systematic approach to problem identification

Troubleshooting process for unstable test results

When there are test results that are sometimes passing and sometimes failing, the source of the problem needs to be systematically investigated:

Step 1: Equipment Ontology Verification

Operating Methods: Pinch the opening of the test tube to perform an unloaded test
standard of judgment: If the display passes, the instrument system is normal
Problem orientation: Rule out that the device itself is faulty and that the problem is with the product or the connections

Step 2: Leak pinpointing

Detection Tools: Soapy water or specialized foam solution
Operating Methods: Apply testing fluid to joints where the product may leak
Observation points: Observe for air bubbles during testing
Analysis of results: The location of the bubble is the actual leakage point.

Quick Solutions to Common Problems

problematic phenomenon	Possible causes	cure
Unable to start test	External control settings not configured	Checking the external control setup parameters
Slow pressure build-up	Insufficient air pressure	Checking the air supply system
Large deviations in test results	Insufficient balancing time	Add balance time setting
Data query blanks	Interface needs to be refreshed	Click the invisible refresh button

IV. Data management: establishing a complete quality traceability system

Historical data query and analysis

pass (a bill or inspection etc)Data Query → Historical dataFunctions that can:

• Query test records by time period for a specific period
• Analyzing trends in pass rates
• Identify batch quality problems
• Data support for process improvement

Data maintenance operations

Data cleansing: Regularly deletes outdated data to keep the system running efficiently
data backup: Important test records should be backed up in a timely manner to prevent data loss
statistical analysis: Conduct statistical analysis of quality using test data to continuously optimize the production process

V. Daily operations and maintenance: key elements for maintaining optimal equipment condition

standard operating procedure

Prepare for startup

1. Check if the air pressure is normal
2. Confirm stable power connection
3. Verification of test tube connection sealing
4. Run the system self-test program

test execution

1. Push the fixture quick switch to the bottom and turn on the air supply
2. Place the product to be tested and make sure it is well sealed
3. Test program initiation via fixture switch
4. Observe test results and record anomalies

Shutdown Maintenance

1. Push the fixture switch back to turn off the air supply
2. Clean up the test area and keep the environment tidy
3. Press the switch at the rear of the instrument to turn off the unit
4. Check the appearance of the equipment, find abnormalities in a timely manner

Preventive Maintenance Points

Daily inspections: Air tube connection, electrical contact, display function
periodic calibration: Pressure sensor accuracy, time parameter accuracy
Cleaning and maintenance: Test port cleaning, display protection
Records management: Maintenance records, troubleshooting files

Summarize

By mastering the above systematic operation method, you will be able to fully utilize thePrecision Engineering'sAirtightness TesterThe testing capability of the company provides reliable guarantee for product quality and realizes the double improvement of production efficiency and quality control.

If you have any specific needs or questions about waterproof testing or airtightness testing of products, you can visit theJingcheng Gongke airtight official websiteOr contact us directly, Precision Engineering will be happy to serve you with the most professional answers and customized solutions!

Original Statement: This article was written byShenzhen Jingchenggongke Technology Co., Ltd.Written by the technical team, reproduced with attribution.Data sources: Precision Engineering internal test data and customer cases.