Archive for June, 2014

The Case for using Dew Point for Testing ESD Control Materials

June 17th, 2014 No comments

All ESD Association (ESDA) standards that are used to evaluate the properties of ESD controlled materials require testing under defined temperature and relative humidity conditions. Although the exact values vary by standards document the typical environmental conditions are:

• Low Relative Humidity – 12% ± 3% RH and 230 C ± 30C

• Moderate Relative Humidity – 50% ± 5% and 230 C ± 30C

Read more…

ESD Control Materials and Electrical Safety Hazards

June 17th, 2014 No comments

For many years companies, that handle electrostatic discharge (ESD) sensitive products, have asked if it is safe to connect their employees to ground when they are working with powered equipment.

The answer to this question is not a simple “yes” or “no”. The grounding methods required by ESD Control Programs such as ANSI/ESD S20.20 and IEC 61340-5-1 often conflict with the requirements for protecting personnel from hazardous electrical currents in some operations. Read more…

Is ESD Walking Test mandatory to have for an EPA?

Recently, a customer asked a question regarding use of the ANSI/ESD STM97.2 Walking Test (Floor Materials and Footwear – Voltage Measurement in Combination with a Person). She wanted to know if it was necessary to have for an EPA (ESD Protected Area). In my opinion the STM97.2 walking test should be used as necessary as follows. Read more…