Identify Sources of ESD at the Work Area with Static Field Meter: Measure – Control – Verify

Indicate surface voltage and polarity of objects.

Insulators must be identified at an ESD work area and must meet the guidelines in the ESDA’s ESD Control Program Handbook-ESD TR20.20.

Non-Process Essential Insulators
If items that can charge to 125 volts or more*, then one of the following will be used:

  • Remove the item from the EPA
  • Permanently secure, so that insulators that charge to > 125 volts are a minimum of 1″ from ESD susceptible items at all times (12″ from ESDS if can charge 2,000 volts or more)

Process Essential Insulators
If process essential non-conductors / insulators (i.e., circuit board materials, some device packages, and test fixtures) are used in the ESD Protected Area that can charge 125 volts* or more, then one of the following will be used:

Use the field meter to verify that the the charge generation ESD protective version products (binders, shop travelers, packaging, foam, chair covers, etc) are < ±125 volts (<±2,000 volts) and ionization test kit to verify the offset voltage (balance) and charge decay of ionization equipment.

* Static field meters are used to measure the charge generation of insulators and isolated / un-grounded conductors. Surface resistance meters are used to measure the Resistance point-to-point (Rtt) and resistance point-to-ground (Rtg).

Click HERE to learn more about Desco Digital Static Field Meter and Ionization Test Kit.

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