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General Questions

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Bags and Packaging

Moisture barrier bags are designed for the packaging of SMD’s protecting them from moisture and static damage. Dry devices are placed inside the moisture barrier bag and the moisture-laden is evacuated.

See our moisture barrier bag range here.

Moisture Barrier Bag

They should only be used for non-static sensitive components, e.g. Nuts, bolts, paper. These are the only acceptable ‘plastic’ bags in an EPA. They offer no effective protection against a contact ESD. Antistatic bags deteriorate with wear and time, monitoring them is very important.

Note: Ordinary plastic bags can generate and hold static charges in excess of 10,000v!

See our antistatic bag range here.

Antistatic Bag

Do not crease the bag as this can breakdown the integrity of the metalised shield. You should not use any bags damaged with tears and / or punctures as these can destroy the function of the faraday cage. Metalised Shielding Bags can deteriorate with use, monitoring them for effectiveness is crucial.

See our metalised shielding bag range here.

Metalised Shielding Bag

If bags, holding static sensitive components, are to be handled outside of an EPA, they should be metalised shielding bags – a faraday cage. Metalised shielding bags can be an effective faraday cage, subject to the quality of material and physical condition.

See our metalised shielding bag range here.

Metalised Shielding Bag

Using the correct packaging and materials not only protects your static sensitive components, but it can save you money too. If you use incorrect packaging then you could potentially cause damage to your device/component.

See our ESD bag range here.

ESD Matting

Rubber matting should be used when you are working with chemicals and/or where high resistance to heat is required. It’s very durable and can be easily cleaned. Vinyl matting provides excellent static dissipation and it’s much more cost-effective opposed to rubber. It’s great for table-top work surfaces and can be easily cut into shape.

To view our ESD Matting range, please click here.

ESD Matting

Category: ESD Matting

General ESD Questions

There are 3 possible solutions:

1) If the electrostatic potential measured at the surface of the process required insulator exceeds 2,000 V, the item shall be kept a minimum of 30 cm from the ESDS; and
2) If the electrostatic potential measured at the surface of the process required insulator exceeds 125 V, the item shall be kept a minimum of 2,5 cm from the ESDS.
3) If the measured electrostatic field or surface potential exceeds the stated limits, ionization or other charge mitigating techniques shall be used.

This is usually in the datasheets of the individual components. It is often referred to as human body voltage (HBV).

Yes – an ESD floor is part of a system for personal grounding.

“For standing operations, personnel can be grounded via a wrist strap system or by a footwear-flooring system. When a footwear-flooring system is used, personnel shall wear ESD footwear on both feet and the two following conditions shall be met:

• The total resistance of the system (from the person, through the footwear and flooring to ground) shall be less than 1,0 × 109 Ω;

• The maximum body voltage generation shall be less than 100 V.” (IEC 61340-5-1 5.3.3)

View our range of ESD shoes here.

black ESD Trainer with white soleESD white trainer with pink lacesESD white slip on shoe

BS EN 61340-5-1:2016

This is a tricky one and 2 points need to be considered.

1) If the water bottle is conductive and grounded then there is no issue.

2) If the water bottle is not conductive it may produce an electrostatic field. If this is the case then they need to be kept a safe distance from any electrostatic discharge sensitive device.

Electrostatic charges are generated when two surfaces come into contact with each-other then separate apart.

Yes, in accordance with IEWC 61340-5-1 ESD footwear must be worn on both feet.

View our range of foot grounding products here.

Or, see our bestselling foot grounding product below.

If the limits in IEC 61340 -5-1  are exceeded, the ESD control program shall include a tailoring. Tailoring is accomplished by evaluating the applicability of each requirement for the specific application. Upon completion of the evaluation, requirements may be added, modified or deleted. Tailoring decisions, including rationale and technical justification, shall be documented. (IEC 61340-5-1 5.1.3 Tailoring).

An example of this may be that the resistance of a floor exceeds the parameters of the IEC 61340 standard (ie greater that Rg < 1,0 × 109) If you can show that your controls are fit for purpose and keep the electro static discharge sensitive device safe by not exceeding the HBV of 100V.

General Static Term Definitions

An electrical charge/field that isn’t moving.

An E.P.A means ‘Electrostatic Protected Area’. A static safe handling area could be a bench, a room or any other designated area and should not have any ‘static field’ greater than 100v maximum.

Conductive means low resistance (i.e. less than 1 meg-ohm (10^6) – the closer to 1 meg-ohm (10^6), the slower the discharge.)

To generate ‘static’ by the rubbing or separating of surfaces.

Increased resistance, which protects better against an E.S.D (i.e. between 1 meg-ohm (10^6) and 1000 meg-ohm (10^9).

E.S.D stands for ‘Electro Static Discharge’. An uncontrolled surge of ‘static’ between objects with different voltage potentials.

Minimal generation or retention of a ‘static’ charge.

A conductive barrier against E.S.D (e.g. Metallised Shielding Bag, Conductive Box etc.)

A static voltage difference between two items.

Does not allow the free flow of electrons, therefore, it will more than likely cause problems e.g. prevent a path to earth, hold a ‘static’ field, etc.

Handling Unpowered Products

You may cause an E.S.D onto a component/PCB.

It puts you at the same voltage potential as your E.P.A

If a component has ‘catastrophic’ damage it will show up in a test. However, ‘latent’ damage may not appear as a failure until later; i.e. tomorrow, next week, next month or even next year.

Ionisers

Bench top ionisers are used to ensure a static free work area by neutralising static charge on insulated objects by producing a balanced source of positively and negatively charged ions. Its smaller size and lighter weight have made it more convenient to use which is great for workstations.

See our bench top ioniser range here.

Bench Top Ioniser

Category: Ionisers

Overhead ionisers ensure a static-free work area by neutralising static charge on insulated objects by producing a balanced source of positively and negatively charged ions. They are light-weight, quiet and are high-performing. The fans are independent of each other with individual controls and circuitry. These units have a built-in auto-balance feature with an out-of-balance alarm.

See our overhead ionisers here.

Overhead Ioniser

Category: Ionisers

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