Laboratory scratch test equipment for GB 4943.1

Whats/App: +86 156 1874 6768

Web: standard-groups.com

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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