ESD control – Which measure directly reduces electrostatic potential while servicing electronics?

Introduction / Context:
Electrostatic discharge (ESD) can silently damage sensitive components. Technicians must lower their body's electrostatic potential relative to the equipment to prevent sudden discharge events.

Given Data / Assumptions:

• Bench with an ESD mat connected to ground is available.
• Technician is handling static-sensitive devices (CMOS, MOSFETs, memory).
• Standard ESD controls are in scope: wrist straps, ionizers, monitors.

Concept / Approach:

The most direct and effective method for minimizing the voltage between a person and the device is to wear an antistatic wrist strap clipped to a verified ground (or to a common point ground on an ESD mat). This continuously bleeds charge and equalizes potential, sharply reducing ESD risk.

Step-by-Step Solution:

Verification / Alternative check:

ESD audits show wrist strap use reduces typical human-body model voltages from thousands of volts to safe levels. Continuous monitors can alarm on open straps, validating protection.

Why Other Options Are Wrong:

Ionizers help neutralize charge on insulators but do not guarantee the person is at the same potential as the device. Rubber gloves can increase charge; a static meter only measures fields and does not reduce potential.

Common Pitfalls:

Failing to verify the strap ground; clipping to painted or floating metal; forgetting heel straps when standing on ESD floor without wrist strap.

Final Answer:

A wrist strap connected to a proper ground.