What data should be recorded in the ULPA maintenance log? Operating hours and maintenance ledger

The ULPA filter maintenance log should link the filter element identity, operating conditions, inspection results and processing events together. Merely recording 'maintained' cannot explain subsequent changes in pressure difference, air volume or leakage. A common problem with maintenance logs is that they are too easy to remember: the date is there, the action is there, but which filter element it corresponds to, what the working conditions were at that time, and how the data changed after replacement, cannot be found. When the pressure difference is abnormal or traceback is needed, I check the log and find that there is no available information. Aili Industry isWhen the HEPA/ULPA filter is delivered, a unique number is created for each filter element to matchThe partitioned operation data of the FFU computer group control system allows the log to have a complete identity and working condition background from the day the filter element is installed.

1. Fix the identity of each object: the model, number, and location must correspond one to one.

Record the model, serial number, installation point, date of use and associated equipment. After replacement, keep the correspondence between the old and the new to avoid overwriting the history.

When multiple filter elements of the same model are running in the same area, if the log only writes the model number but not the number, it will be impossible to determine which one has a problem, which one has been replaced, and which one is still the original. Aili Industry isULPA ultra-high efficiency filters are delivered with a unit number.Non-standard ULPA filter projects are also delivered by number. After the project party records the number corresponding to the installation point, the maintenance log will have a unique identification basis. The relationship between levels and filtering requirements can be found inISO cleanliness level comparison。

2. Record comparable operating data: air volume, pressure difference, rotation speed and operating time must be synchronized

Including air volume, pressure difference, speed or operating mode, operating hours and related environmental abnormalities. Operating hours describe exposure time but do not alone determine lifetime.

There is only pressure difference without air volume and rotation speed, so the pressure difference data cannot determine the source of change; there is only operating hours without pressure difference trend, and operating hours cannot reflect the actual load. Ai Li industrialFFU fan filter unit andThe EFU equipment end fan filter unit control scheme collects wind volume, pressure difference and speed synchronously.The FFU computer group control system records these parameters by partition, and the maintenance log can directly reference the group control data without manual copying. For the recording method of pressure difference data, please refer toHEPA FAQs and Selection Guide。

3. Relate events to results: pre-filter replacement, shutdown, leak detection and rectification must be linked

List pre-filter replacement, shutdown, leak detection, material abnormalities and rectification, with report number and recovery status to facilitate cross-team handover.

If maintenance events only record actions but not results, there will be no basis for subsequent judgments. Whether there is any change in the terminal pressure difference after the pre-filter is replaced, what the retest results are after leak detection and rectification, and whether the air volume returns to the original setting after restarting after shutdown, all these must be recorded in the log. Aili Industry isthe ULPA ultra-high efficiency filter is delivered.The test report number can be provided when The FFU computer group control system can mark maintenance event time points. After the two are matched, the events in the log can be linked to data changes. For the recording requirements of device-side maintenance events, please refer toEFU FAQ and technical support。

4. Sensor or measurement changes must be noted in the log, and trends cannot be continued without marks.

If a sensor replacement occurs between two identical pressure differences, this should be noted in the log, otherwise the trend may be misinterpreted as long-term stability. Pressure point displacement, instrument calibration or range adjustment also need to be marked.

Aili Industry isThe parameter configuration of the FFU computer group control system supports recording sensor changes and setting adjustments. The data before and after changes can be displayed separately on the trend chart to avoid misjudgment of instrument changes as changes in filter element status. For the relationship between pressure difference data and instrument status, please refer toULPA ultra-high efficiency filter FAQ and selection guide。

5. The statistical caliber of operating hours should be unified

The day on which the operating hours start to be recorded, whether the downtime period is included, and whether it is cleared after replacement. These calibers are not uniform, and the data at different points cannot be compared horizontally. Aili Industry isIn the group control data of the FFU fan filter unit, the running time is automatically accumulated according to the equipment operating status, and the downtime period is marked separately, so that the project team can use the same caliber in the log to avoid each team recording their own events.

6. Related articles

ULPA ultra-high efficiency filter FAQ and selection guide

FFU computer group control system

FFU FAQ and technical support

HEPA FAQs and Selection Guide

7. Key points for selection and acceptance inspection

8. Product matching and technical support from Aili Industrial

Aili Industry isWhen HEPA/ULPA filters are delivered, a unique number is assigned to each filter element.ULPA ultra high efficiency filter withNon-standard ULPA filters are delivered by number to facilitate correspondence with the installation point.FFU fan filter unit andThe EFU equipment end fan filter unit control scheme collects wind volume, pressure difference and speed synchronously.The FFU computer group control system records parameters by partition, marks maintenance events and sensor changes, and automatically accumulates running time according to operating status. The maintenance log can directly reference the group control data. Provide process objectives, installation drawings, operating conditions and acceptance requirements, and can further communicate ULPA standard specifications, non-standard interfaces, samples and batch matching. The specific parameters and test range are based on the confirmed model and technical documents.