As a key equipment for detecting product sealing, the daily maintenance of the coarse leakage tester should focus on the three core elements of core component status, environmental adaptability, and operational standardization. The following are specific maintenance points and precautions:

1、 Core component maintenance: the cornerstone of precise detection

1. Sensor calibration and cleaning

• Regular calibration: The pressure sensor needs to be calibrated with a standard pressure source every 1-3 months (depending on the frequency of use) to ensure an error of ≤ ± 1% FS (full range). For example, a pharmaceutical company's failure to calibrate sensors resulted in a misjudgment rate of up to 20% for a batch of infusion bag leaks, and the error rate decreased to 0.5% after calibration.

• Cleaning taboos: Only use a dry soft cloth to wipe the sensor probe. For stubborn stains, dip a small amount of distilled water. It is strictly prohibited to use organic solvents such as alcohol and acetone to avoid corrosion of sensitive components.

2. Vacuum pump maintenance

• Lubricating oil replacement: Replace the vacuum pump special oil every quarter, and keep the oil level at 1/2-2/3 of the oil window. If the oil is cloudy or contains water, it should be replaced immediately and the gas damper valve should be checked for failure.

• Performance monitoring: If it is found that the pumping time is prolonged or the vacuum degree is insufficient (such as unable to reach -90kPa), it is necessary to check whether the valve plate has carbon deposits and whether the sealing ring is aging.

3. Seal and gas path inspection

• Sealing ring replacement: Check O-rings, gaskets, and other elastic components monthly. If cracks, hardening, or deformation occur, replace them immediately. For example, a certain electronics factory failed to replace the aging sealing ring, resulting in water leakage from the water tank during testing and damage to the circuit board.

• Air path cleaning: Use compressed air to blow the air path interface to prevent dust from blocking the valve. A certain packaging factory experienced frequent false alarms due to air blockage, resulting in a 90% decrease in failure rate after cleaning.

2、 Environmental Control: Ensuring Stable Operation

1. Temperature and humidity management

• The equipment should be placed in an environment with a temperature of 15-30 ℃ and a humidity of ≤ 70%, avoiding direct sunlight or being close to heat sources. A laboratory caused a short circuit of condensed water on the touch screen due to equipment being close to the air conditioning outlet. After adjusting the position, the fault was reset to zero.

• Dehumidifiers should be equipped in high humidity environments (such as the southern rainy season) to prevent circuit boards from getting damp and short circuiting.

2. Dust and corrosion prevention

• Cover the equipment with a dust cover during non use and place a moisture-proof silicone bag inside the cover. A certain pharmaceutical company did not carry out dust prevention treatment, and dust entered the air valve, causing significant fluctuations in test data. After cleaning, the problem was solved by installing an air filter.

• Avoid using in corrosive gas environments such as chlorine and hydrogen sulfide. If necessary, choose corrosion-resistant equipment.

3. Power stability

• Configure an AC regulated power supply of 500W or above, with voltage fluctuations controlled within ± 5%. A testing institution suffered from a voltage drop that caused the equipment motherboard to burn out. After replacement, a UPS power supply was installed to achieve stable power supply.

• The grounding wire should be reliably connected to avoid static electricity or leakage damage to the equipment.

3、 Operating standards: the key to extending lifespan

1. Standardized operating procedures

• Before testing, check if the air circuit connection is tight, and when inserting the hole puncher into the packaging, control the depth to be ≤ 3mm (to avoid damaging the material). A certain packaging factory experienced an increase in false leakage rate due to deep perforation, but the problem was resolved after standardized operation.

• After the test is completed, follow the sequence of "turn off the gas source first, then turn off the power" to avoid damaging the sensor due to back pressure.

2. Data recording and tracing

• Record the pressure curve, environmental temperature and humidity parameters for each test, and establish equipment maintenance records. A certain enterprise found through analyzing historical data that the leakage rate of a certain batch of packaging significantly increased when the humidity was greater than 65%, thus optimizing the drying process.

• If the device supports data export function, it is necessary to regularly backup test reports to prevent data loss.

3. Regular deep maintenance

• Every year, a comprehensive inspection is conducted upon returning to the factory to replace vulnerable parts such as probe protective film and sealing strips. A medical device company has extended the average usage time of its equipment from 1200 hours to 2500 hours through annual deep maintenance.

• When performing self maintenance, it is necessary to disconnect the power supply and wear an anti-static wristband to avoid the risk of short circuit or electric shock.

4、 Emergency response: Quickly restore production

• Sudden malfunction: If the equipment alarms and shuts down, first check the air source pressure and power stability, and then troubleshoot core components such as sensors and vacuum pumps. If it cannot be resolved by oneself, it is necessary to immediately contact the manufacturer's after-sales service to avoid blind disassembly and secondary damage.

• Spare parts reserve: Keep readily available vulnerable parts (such as sealing rings, sensor probes) to shorten maintenance cycles. Due to a shortage of spare parts, a certain enterprise's equipment was shut down for 3 days, directly affecting production progress.

Through the above maintenance measures, the detection accuracy, stability, and service life of the coarse leakage tester can be significantly improved, providing strong support for enterprises to save maintenance costs and ensure product quality.