29/05/2025
9-Point Metal Detection Machine Calibration Process 🔍
1. Pre-Calibration Preparation
- Warm-Up: Power on the machine 30 minutes before calibration to stabilize sensors .
- Test Blocks: Use standard test blocks (e.g., FeΦ1.5mm, SUSΦ2.5mm, non-FeΦ2.0mm) to validate sensitivity.
2. 9-Point Calibration Method
- Positioning: Place test blocks at 9 critical points on the conveyor:
Upper Layer: Left, center, right positions.
Lower Layer: Left, center, right positions.
Product Simulation: Test blocks are placed on top and beneath sample products to mimic real conditions.
- Detection Validation: Each test block must trigger an alarm 3 times per position (total 27 tests for 3 block types).
3. Frequency & Compliance
- Daily: Calibrate before first use.
- Every 2 Hours: Recalibrate during operations to maintain accuracy.
- Post-Adjustment: Always recalibrate after sensitivity tweaks or repairs.
4. Documentation & Accountability
- Record Keeping: Log every calibration result in a 《Metal Detection Calibration Record》, signed by both factory operators and QC teams.
- Fail-Safe Protocol: If any test fails, pause production, recheck the last 2 hours of products, and trace contamination sources.
5. Post-Calibration Checks
- Environmental Scan: Ensure no metal interference (e.g., tools, phones) within 20 cm of the machine.
- Final Test: Run three consecutive product simulations to confirm stability.