Knowledge Base Retrieval and Recall for General Equipment

What the data for this category looks like

Data sources for general equipment include classification standard documents published by industry associations, manufacturer factory technical manuals, third-party quality inspection and compliance reports, and equipment operation and maintenance logs. Update rhythms vary. Industry standard documents are updated every 1 to 2 years. Manufacturer new product parameters are updated synchronously with product iterations. Operation and maintenance logs are generated in real time as equipment runs. Single documents are mostly structured. They contain fields such as equipment model, rated power, rotational speed, applicable working conditions, and compliance certification number. Most units use international standard values like kW, r/min, and MPa.

Constraints on knowledge base retrieval and recall

Dispersed data sources and uneven update rhythms require retrieval systems to support multi-source incremental indexing. This prevents duplicate or outdated data from appearing in recall results. Many closely related professional parameter fields exist. Full-text retrieval alone may lead to matching errors. Field-level precise retrieval must be supported. Single documents have large volume and complex structure. The parsing and segmentation process must adapt to long-text processing. This prevents truncation of parameter-related information. Due diligence reports have high accuracy requirements. The recall link must filter irrelevant content. This prevents redundant information from interfering with professional judgment.

How to set configurations

Configuration Item	Recommended Value	Rationale
`UPLOAD_FILE_MAX_SIZE`	`500 MB`	General equipment documents often include complete manuals and quality inspection reports, with large single-file sizes. This value covers most scenarios
`PARSE_FILE_TIMEOUT_SECONDS`	`600 seconds`	Long document parsing requires significant time. This value prevents timeout during parsing of large equipment manuals
`chunk_size`	`800–1200 characters`	General equipment parameter documents have continuous technical paragraphs. This segmentation length preserves parameter-related context
`similarity_threshold`	`0.72–0.85`	Professional parameter matching requires a high similarity threshold to avoid irrelevant results being included in due diligence reports
`top_k`	`Top 8–12 entries`	Due diligence reports need to cover multi-dimensional equipment parameters. Too many recalled entries increase the context processing burden
`rerank_top_n`	`Top 3–5 entries`	Only the most relevant professional parameter content must be retained to improve retrieval accuracy

The parameter values provided on this page are all conventional recommendations used as a starting point for configuration. Actual values are affected by material form, data volume and business rules. Specific issues require specific analysis. It is recommended to test on your own samples before finalizing the configuration.

Three common mistakes

The symptom is that the local knowledge base unexpectedly returns publicly accessible external network data. The cause is that the ALLOW_EXTERNAL_DATA_SYNC configuration item is not disabled, causing the indexing process to automatically pull content from non-specified data sources.
The symptom is empty results returned after configuring the duckduckgo_search tool. The cause is that valid network egress parameters are not configured, or tool call permissions are not enabled.
The symptom is missing fields after parsing uploaded large equipment technical manuals. The cause is that chunk_size is set too large, causing truncation of continuous parameter field content during segmentation.

How to confirm correct configuration

Upload a single general equipment manual larger than 100 MB. Check whether the parsing task status is completed within the PARSE_FILE_TIMEOUT_SECONDS period.
Initiate a query containing specific equipment model and rated power. Verify whether the recall results include precise matching content for the corresponding fields.
View the knowledge base configuration panel. Confirm that the ALLOW_EXTERNAL_DATA_SYNC configuration item is disabled.
Test the duckduckgo_search tool call. Check whether valid search results are returned.

Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-14.