Laboratory scratch test equipment for GB 4943.1
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Standards
(1) GB 4943.1 – Information Technology Equipment – Safety – Part 1: General Requirements (Clause 2.10.6.6)
(2) GB 4706.1 – Household and Similar Electrical Appliances – Safety – Part 1: General Requirements (Clause 21.2)
(3) IEC 60950-1 – Information Technology Equipment – Safety – Part 1: General Requirements (Clause 2.10.6.6)
(4) IEC 60335-1 – Household and Similar Electrical Appliances – Safety – Part 1: General Requirements (Clause 21.2)
Parameters
| Parameter | Specification |
|---|---|
| Input Voltage | AC 220V / 50Hz |
| Control System | PLC + Touchscreen |
| Drive Type | Stepper motor |
| Scratch Speed | 0–25 mm/s (adjustable) |
| Test Cycles | 0–9999 (presettable) |
| Scratch Spacing | Adjustable, 1–19 mm |
| Worktable | 360° rotatable |
| Scratch Load | 10 N ±0.5 N |
| Stylus | Hardened steel, conical tip, 40° cone angle, radius 0.25 mm ±0.02 mm (replaceable) |
| Scratch Angle | Vertical to sample surface, 80°–85° (adjustable) |
| Scratch Length | Max 200 mm (adjustable) |
| Translation Distance | Max 200 mm (adjustable) |
Features
Uses hardened steel conical stylus with polished tip (R0.25 mm ±0.02 mm) for precise scratch application.
Scratch tests performed at 20 mm/s ±5 mm/s in planes perpendicular to the conductor edge.
Stylus applies consistent load of 10 N ±0.5 N along its axis.
Scratch spacing ≥5 mm between lines and ≥5 mm from sample edges to ensure uniform results.
PLC + touchscreen control system for stable operation and easy parameter setup.
Rotatable worktable enables scratch testing in both longitudinal and transverse directions.
Adjustable speed, angle, length, and spacing allow compliance with multiple standard requirements.
Accessories
(1) Hardened steel stylus (conical tip, replaceable)
(2) Calibration weights and load adjustment kit
(3) Sample mounting clamps and rotating table
Test Procedures
Sample Installation
Place the sample on the rotatable worktable and secure it using clamps.
Parameter Setup
Set scratch speed, load, angle, length, and spacing on the touchscreen interface.
Scratch Test Execution
Start the test via PLC control.
The stylus moves along the sample at the preset speed and angle, applying a load of 10 N ±0.5 N.
Rotate worktable as needed for transverse or longitudinal scratch lines.
Observation and Recording
Inspect scratches visually or with measurement equipment.
Record data for quality assessment or compliance verification.
Maintenance Information
Clean stylus and worktable after each test to remove debris.
Check stylus tip for wear and replace when necessary.
Ensure stepper motors and PLC system are functioning properly.
Verify load calibration periodically to maintain test accuracy.
Keep touchscreen interface free of dust and moisture.
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