This page is based on the function configuration instructions for FastGPT v4.17.0.
What data for this category looks like
Data for this category primarily comes from design documents, standard instrument and environmental monitoring data, calibration software outputs, laboratory information systems, and customer range requirements. Data updates trigger after each calibration of a single device. Daily produced documents include assembly and commissioning sheets, calibration procedures, original calibration records, error curves, metrology certificates, and software version records. Core fields include unique device under test number, calibration date, measured error value, traceability number, environmental parameters and their corresponding units. Data structure varies slightly based on calibration project type.
What constraints do these characteristics impose on the HTTP interfaces and external systems workflow
Data sources for this category are scattered. Connections must be made to multiple external systems including calibration software and laboratory information systems. As such, HTTP interfaces must support parallel calls to multiple endpoints. Data updates trigger with each individual calibration workflow. Interfaces must support receiving real-time data on demand to adapt to real-time submission scenarios for single calibrations. Core fields include error values with units and traceability numbers. Interfaces must return complete field information. Calibration records are key deliverables. Interfaces must return fully traceable complete data, and include built-in status code checking and retry mechanisms to prevent metrology audit failures caused by data transfer errors.
How to set configurations
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
| Interface timeout period | 600 seconds | Fits time requirements for multi-point calibration data collection and error calculation |
Authorization configuration | Carry a dedicated access token for the calibration system | Ensures access permission security for external system interfaces |
variables field mapping | Associate core fields such as device under test number, calibration date, and error value | Matches required data items for production ledger summary |
responseData parsing rules | Extract returned data completely by field name | Ensures core information of calibration records is not lost |
| Request retry count | 3 times | Addresses request failures caused by temporary network fluctuations |
| Text splicing rule | Splice error curve data in calibration order | Fits archiving format requirements for original calibration records |
Three common mistakes
- Phenomenon: After calling an external database interface, a JSON array is returned. When reading fields in the ledger node, the fields show as empty or have format errors. Cause: The nested fields returned by the interface are not mapped via the
variablesconfiguration, making it impossible to directly extract core data such as the device under test number. - Phenomenon: After using a loop node to splice text, the external notification interface call has no response. Testing the interface address alone sends messages normally. Cause: The text output by the loop node contains unescaped special characters, causing the interface request body format to be non-compliant.
- Phenomenon: The interface call returns a 401 status code, and calibration data cannot be synchronized to the laboratory information system. Cause: The
Authorizationparameter is not configured correctly, and an expired or unauthorized access token is used.
How to confirm the configuration is complete
- Send a simulated request for calibration data of a single device, and check whether the parsed data includes the preset core fields.
- Call the configured interface, confirm that the returned status code meets expectations, and access permission verification works normally.
- Trigger the ledger summary workflow, and check that the field consistency between the data submitted via the interface and the original calibration records is correct.
- Simulate a temporary network interruption scenario, confirm that the interface retry logic takes effect, and no data is missing.
The values provided are common starting points and should be measured against the reader's own samples.