When conducting on-site vacuum degree screening of vacuum switch arc extinguishing chambers, operation and maintenance personnel often encounter a specific problem: after a set of data is measured, when they want to retrieve and compare it a few days later, they cannot find the test conditions and results from that time. If the data recording and traceability process is not in place, the value of the testing work will be diminished. Based on the application characteristics of the GSZK-3 vacuum switch vacuum degree tester, the following provides a technical review of common on-site questions.
1. What information does test data include, and why should attention be paid to record completeness
Vacuum degree testing is not merely reading a single value. During on-site screening, the arc extinguishing chamber tube type, measured vacuum degree value, test time, and ambient temperature together constitute a complete record. Different tube types have different judgment baselines; changes in ambient temperature have a certain impact on measurement conditions; and the test time is related to whether the data can correspond to the power outage maintenance plan. The GSZK-3 vacuum switch vacuum degree tester has a built-in memory that can store no fewer than 200 sets of test data, with each set covering the above fields, providing a basis for subsequent retrieval and horizontal comparison. Operation and maintenance personnel should develop the habit of checking record fields after testing, avoiding recording only values and not conditions.
2. What requirements does the screening method without disassembling the arc extinguishing chamber place on records
This method does not require disassembling the arc extinguishing chamber and is suitable for rapid on-site screening of vacuum switches. This feature improves testing efficiency, but also means that a single on-site visit often covers multiple switches and multiple tube positions, resulting in a large volume of data. If manual transcription is relied upon, mismatches between tube types and measurement points are likely to occur. Using the instrument's storage function to save records in test order and organizing them by equipment number before finishing work is a relatively reliable practice. It should be noted that stored data should be exported and backed up regularly to prevent records from being overwritten after long-term use of the instrument.
3. On-site practices for the traceability process
The key to data traceability lies in "correspondence." It is recommended to simultaneously mark the switchgear number or bay name in the test records so that the tube type and vacuum degree value in the instrument can correspond to specific equipment. When retesting, retrieve historical records and compare the trend of vacuum degree value changes at the same tube position at different times, which is more informative than a single absolute value. For tube positions with significant value changes, further testing can be arranged to form a closed loop from screening to review.
4. Several reminders during use
The instrument should be stored in a dry environment with relatively stable temperature, avoiding prolonged exposure to severe temperature changes. Before testing, confirm that the input tube type parameters are consistent with the actual arc extinguishing chamber to reduce data deviation caused by parameter mismatch. When stored records approach the capacity limit, export and clear them promptly to ensure normal saving of subsequent tests. On-site operators should designate a fixed person responsible for record organization to prevent data from being scattered among multiple people and difficult to consolidate.
