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Deal of the Week – 25% Off Jewel® Mini Monitor

http://www.charleswater.co.uk/DealWeek.aspx

Check this link weekly for special pricing on overstock items.

Discover deep discounts on high quality Charleswater ESD Control Products.

Save on your regular stocking orders.

Current Deal of the Week

25% Off Jewel® Mini Monitor

Jewel® Mini Monitor

99135 – Jewel Mini Monitor Workstation, Sapphire, 220VAC

  • Improved Banana Jack
    Creates a more consistent connection and helps to prevent accidental disconnects with operator’s wrist strap banana plug.
  • Small size – 70mm x 53mm
    Takes up minimal worksurface area.
  • Two 10mm threaded studs installed on bottom of unit
    Permanently snap monitor flush on mat.
  • Two 10mm push and clinch sockets included
  • Power Adapter, 24 VAC

Use code C101 at checkout. Valid for online orders only.

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Now is the Time for ESD Control Programs to be Improved

Originally Published by InCompliance Magazine- September 2012
“By Fred Tenzer and Gene Felder”

ElectroStatic Discharge (ESD) is the hidden enemy within your factory. You cannot feel or see most ESD events but they can cause electronic components to fail or cause mysterious and annoying problems. There are two types of ESD damage: 1) Catastrophic failures, and 2) Latent defects. By definition, normal quality control inspections are able to identify catastrophic failures, but are not able to detect latent defects.

In general, the ESD susceptibility of modern electronics are more sensitive to ElectroStatic Discharge; that is the withstand voltages are lower. This is due to the drive for miniaturization particularly with electronic devices operating faster. Thus the semiconductor circuitry is getting smaller. For example Intel began selling its 32 nm processors in 2010 that would be 0.032 micrometer equal to 0.000032 millimeter or 0.00000128 inch.

For more information on ESD and the direction of electronics manufacturing, see the articles listed below.

Evaluation Engineering Magazine November 2001 article “ESD Control Program Development” “As the drive for miniaturization has reduced the width of electronic device structures to as small as 0.10 micrometer (equal to 0.0001 millimeter or 0.000004 inch), electronic components are being manufactured with increased ElectroStatic Discharge (ESD) susceptibility.”

www.ESDA.org, the ESD Association’s latest White Paper “Electrostatic Discharge (ESD) Technology Roadmap – Revised April 2010” forecasts increased ESD sensitivities continuing the recent “trend, the ICs became even more sensitive to ESD events in the years between 2005 and 2009. Therefore, the prevailing trend is circuit performance at the expense of ESD protection levels.” The White Paper’s conclusions are:

“With devices becoming more sensitive through 2010-2015 and beyond, it is imperative that companies begin to scrutinize the ESD capabilities of their handling processes. Factory ESD control is expected to play an ever-increasing critical role as the industry is flooded with even more HBM and CDM sensitive designs. For people handling ESD sensitive devices, personnel grounding systems must be designed to limit body voltages to less than 100 volts.

To protect against metal-to-device discharges, all conductive elements that contact ESD sensitive devices must be grounded.

To limit the possibilities of a field induced CDM ESD event, users of ESD sensitive devices should ensure that the maximum voltage induced on their devices is kept below 50 volts.

To limit CDM ESD events, device pins should be contacted with static-dissipative material instead of metal wherever possible.”

InCompliance Magazine May 2010 article by Dr. Terry L. Welsher The “Real” Cost of ESD Damage which includes “Recent data and experience reported by several companies and laboratories now suggest that many failures previously classified as EOS may instead be the result of ESD failures due to Charged Board Events (CBE). … Some companies have estimated that about 50% of failures originally designated as EOS were actually CBE or CDE.”

Charleswater

For additonal technical information Click Here

To read the rest of the article go to Now is the Time for ESD Control Programs to be Improved

Charleswater Overstocks – Huge Savings!


If you are in need of ESD Control Products QUICK at Huge Savings, these items are available to ship TODAY.

We have a great variety of overstock wrist straps, heel grounders, mats, bags, testers, ionisers, workstation tools, and many other products.

60021 – Metal Expansion 10mm Stud Wristband, Small

80654 – Statfree Dissipative Euro T2 Roll, Tan, 1.8mm x 0.6m x 12.2m

62428 – Mini Ioniser 220VAC UK/Asia Plug

35175 – Hand Sleeving Cutter

90450 – Statshield Green Metal-In Bag, 100mm x 150mm, 100/Pack

72100 – Statshield Smock, Jacket with Cuffs, Blue, Small

See ALL of our Overstock Items HERE.

Introducing the New EMIT Zero Volt Monitor Solo!

  • Single Station Continuous Dual-Wire Monitor
    Continuously monitors the ground integrity and charge generation of one operator and supervisor as well as the ground integrity for one ESD worksurface and one optional tool, eliminating the need for periodic testing and record keeping of wrist straps
  • Patented* Dual Polarity Technology
    Provides Real-Time Continuous Monitoring for Operator Path-to-Ground and Presence of 1 Meg Resistor True continuous monitoring (versus pulsed) instantaneously detects broken cords, intermittent faults, dry skin, loose bands and low resistance.
  • Dual Polarity Technology
    Steady-State DC Dual Polarity Signal yields virtually zero voltage on the operator
  • Operator Charge Detection Alarm
    Alarms if the operator generates or comes in contact with a voltage that would be dangerous to an ESD susceptible item
  • RS-485 Communication Ports
    Use with EMIT SIM Software for test data acquisition and management
  • User Adjustable Features
    Use the internal DIP switches to enable / disable test circuits and modify the operator test voltage, operator charge detection voltage and worksurface resistance limit
  • NIST Calibrated with Certificate
    Calibrated with accepted procedures and standards traceable to the National Institute of Standards and Technology. For more information on calibration of EMIT products see Calibration
Item Description Price
50579 ZVM Solo, Europe $334.97

“A properly grounded wrist strap will keep a person’s body voltage to approximately + 10 V. The main advantage to a constant [or continuous] monitor is the immediate indication that the employee receives if the wrist strap falls open. With an unmonitored system, the employee will not be aware of a wrist strap failure until the start of the next shift. This has reliability benefits for an ESD program as it might help reduce or eliminate ESD damage.

There are also other process benefits from using constant monitors such as the elimination of the need to maintain daily test logs and a reduction in the time for employees to make the daily test. For units that also monitor the connection of a work surface to protective earth, it is also possible to reduce or eliminate the checking of the work surface as part of the periodic audit of the process.

Constant monitors might be implemented by an organization due to high reliability requirements imposed by customers.” [CLC/TR 61340-5-2:2008 User guide Annex B.1.3 Constant monitors]

*US patents 6,052,053 and 6,205,408

Click HERE for Printable Verison | Sign Up HERE | Request a Demo HERE | See list of sales reps and distributors HERE
All items & programmes are available through your participating distributor | Submit your questions HERE

SmartLog V5™ Data Acquisition System – ESD Data at your Fingertips

The patented* SmartLog V5™ system is designed for fast, frequent and accurate testing of ESD personnel grounding items. The SmartLog V5™ records ESD test data and exports it to a central PC or server in real-time where it can be managed and reported using TEAM5 Software.

  • Single-wire and Dual-wire Wrist Strap Compatible
  • Embedded CCD Barcode Scanner
  • Ethernet Communication
  • Adjustable Resistance Limits
  • Programmable Test Requirements
  • Compatible with Proximity Readers
  • Embedded relay terminal for use with electronic locks, turnstiles and light fixtures
  • 5 Year Warranty

TEAM5 Software
TEAM5 is the most powerful and accurate ESD Test Acquisition Software on the market. Use TEAM5 to automate and manage the ESD test data collected by the SmartLog V5™. Click here to learn more.

Item Description List Price
50762 SmartLog V5™, Europe, w/o Software $3,633.00
50763 SmartLog V5™, Euro, 10MM Adapter, w/o Software $3,633.00
50764 Reader Only, SmartLog V5™, HID ProxPoint Plus $580.00
50765 Reader Only, SmartLog V5™, HID iClass $600.00
50491 TEAM5 Enterprise Software with 1 Year Service $6,166.77
50493 TEAM5 Software with 1 Year Service $1,000.00


*US Patent 6,078,875
“Compliance verification records shall be established and maintained to provide evidence of conformity to the technical requirements. The test equipment selected shall be capable of making the measurements defined in the compliance verification plan.” [EN 61340-5-1 Edition 1.0 2007-08 clause 5.2.3 Compliance verification plan]

Click HERE for Printable Verison | Sign Up HERE | Request a Demo HERE | See list of sales reps and distributors HERE
All items & programmes are available through your participating distributor | Submit your questions HERE

Ground Trolleys in Series With Cords Having 1 Megohm Resistor

Question:
I am confused on ESD connections. I understand that you cannot clip a cord from a wrist strap to the edge of an ESD protective mat. I know that the cord for wrist straps has 1 megohm of resistance and that the point to connect the wrist strap cord should have less than 1 ohm to ground.

I have people using 2 meter high metal rolling trolleys. I believe the preferred method is to connect each trolley directly to a common ground point. Can several trolleys, say 3 to 5 be connected in series with 1 megohm cords with the final cord connected to a ground point or earth bonding point? From what I have read this would only mean about 5 megohms to ground at the furthest cart. I read somewhere something about staying under 35 megohms to ground. Now I cannot find that.

Answer:
The compliance verification limit per EN 61340-5-1 for wrist strap system is less than 3,5 x 10^7 ohms listed in Personnel grounding requirements Table 2. The required limit per ANSI/ESD S20.20 for both working surfaces and mobile equipment (trolleys) is less than 1 x 10^9 ohms resistance to ground listed in EPA requirements Table 3.

It does not do much good to have an operator test their wrist strap using an integrated wrist strap tester as describe in IEC 61340-5-1 Clause A.1, but then work where the matting resistance is added resistance in the path-to-ground.

Although not recommended you could attach the cord for the wrist band to the matting material, and daisy chain the mats and/or trolleys if you could demonstrate that you reliably meet the required limits.

Per CLC/TR 61340-5-2:2008 User guide Wrist Strap subclause 4.7.2.2.2 “NOTE Many wrist strap users have been observed to clip the wrist cord to the edge of an ESD protective mat. This process is not recommended as it can increase the total system resistance to ground to over the 3.5 x 10^7 ohms limit required by IEC 61340-5-1.”

Regarding daisy-chaining “All working surfaces need to be capable of being grounded. EPA grounding of instruments or surfaces by chaining, or by placing items in series should not be used, since in the event of a broken connection the risk of floating items and ESD damage will be unnecessarily increased.” [EN 61340-5-2 clause 5.2.2 Working surfaces and storage racks] Note that both of these recommendations are not requirements.

Regarding ground cords, the grounding conductors (wires) from wrist straps, working surfaces, flooring or floor mats, tools, fixtures, storage units, carts, chairs, garments and other ESD technical elements may or may not contain added resistance. Where added resistance is not present, a direct connection from the ESD technical element to the common ground point or common connection point is acceptable and recommended.

However, “A nominal 1 megohm resistor is commonly used in wrist straps and to ground work surfaces. In the event of an operator touching an energized conductor, for the normal mains electricity supplies this resistor will limit the current flowing through the person to less than 0,5 mA.” [User Guide IEC 61340-5-2-1999 subclause 5.1.1]

Charleswater sells ground cords with and without current limiting resistors – Click Here

ESD Control Programs Should be Improved

ElectroStatic Discharge (ESD) is the hidden enemy within your factory. You cannot feel or see most ESD events but they can cause electronic components to fail or cause mysterious and annoying problems. There are two types of ESD damage: 1) Catastrophic failures, and 2) Latent defects. By definition, normal quality control inspections are able to identify catastrophic failures, but are not able to detect latent defects.

In general, the ESD susceptibility of modern electronics are more sensitive to ElectroStatic Discharge; that is the withstand voltages are lower. This is due to the drive for miniaturization particularly with electronic devices operating faster. Thus the semiconductor circuitry is getting smaller.

See November 2001 Evaluation Engineering Magazine article “ESD Control Program Development” “As the drive for miniaturization has reduced the width of electronic device structures to as small as 0.10 micrometer (equal to 0.0001 millimeter or 0.000004 inch), electronic components are being manufactured with increased ElectroStatic Discharge (ESD) susceptibility.”

What’s happening currently? Intel began selling its 32 nm processors in 2010 that would be 0.032 micrometer equal to 0.000032 millimeter or 0.00000128 inch.

See www.ESDA.org, the ESD Association’s latest White Paper “Electrostatic Discharge (ESD) Technology Roadmap – Revised April 2010” forecasts increased ESD sensitivities continuing the recent “trend, the ICs became even more sensitive to ESD events in the years between 2005 and 2009. Therefore, the prevailing trend is circuit performance at the expense of ESD protection levels.” The White Paper’s conclusions are:

“With devices becoming more sensitive through 2010-2015 and beyond, it is imperative that companies begin to scrutinize the ESD capabilities of their handling processes. Factory ESD control is expected to play an ever-increasing critical role as the industry is flooded with even more HBM and CDM sensitive designs. For people handling ESD sensitive devices, personnel grounding systems must be designed to limit body voltages to less than 100 volts.

To protect against metal-to-device discharges, all conductive elements that contact ESD sensitive devices must be grounded.

To limit the possibilities of a field induced CDM ESD event, users of ESD sensitive devices should ensure that the maximum voltage induced on their devices is kept below 50 volts.

To limit CDM ESD events, device pins should be contacted with static-dissipative material instead of metal wherever possible.”

See InCompliance Magazine May 2010 article by Dr. Terry L. Welsher The “Real” Cost of ESD Damage which includes “Recent data and experience reported by several companies and laboratories now suggest that many failures previously classified as EOS may instead be the result of ESD failures due to Charged Board Events (CBE). … Some companies have estimated that about 50% of failures originally designated as EOS were actually CBE or CDE.”

Charleswater

For additonal ESD information Click Here

ESD Control Program Considerations when Dealing with Class Zero Items

ANSI/ESD S20.20 Foreword states:

  • “This standard covers … electrical or electronic parts, assemblies and equipment susceptible to damage by electrostatic discharges greater than or equal to 100 volts Human Body Model (HBM).”
  • “When handling devices susceptible to less than 100 volts HBM, more stringent ESD Control
    Program Technical Requirements may be required, including adjustment of program Technical
    Element Recommended Ranges.”

HMB Classification Class 0 is:
Per ESD-STM5.1 Human Body Model (HBM) Table 1 Class 0 has ESD Voltage Range < 250 Volts
Basically, to control the environment to decrease the probability of ESD damage in “Class Zero”
situations, involves increasing ESD protective redundancies and periodic verifications to those ESD
Control technical elements.

Improved Grounding

  • Personnel: Decrease Wrist Strap and ESD Footwear upper limit permitted (The ESD Association has test data showing charge on a person is less as the path-to-ground resistance is less) The use of continuous monitors, smocks, use / increased use of ESD flooring, sole or full coverage foot grounders (HBM & CDM)
  • Worksurfaces: Dissipative (CDM) i.e. change < 10^9 to a requirement of 10^6 to 10^8 ohms
  • Bonded grounds – Carts, shelves, equipment
  • Conductors: Minimizing isolated conductors like devices on PC Boards (CDM)

To see examples of Wrist Straps capable of dealing with class zero environments Click Here

To see examples of Grounding Cords capable of dealing with class zero environments Click Here

Minimize Charge Generation
The best form of control is to minimize charge generation. Grounding and ionization eliminate charges once generated. Shielding protects from generated charges.

  • Personnel – Low Charging floor finish
  • Surfaces – Use of low charging (anti-static) topical treatments

Insulators

  • Eliminate as best as possible all non-process necessary insulators
  • Topically treat where ever possible insulators that cannot be removed
  • Consider use of ESD Chairs or treat to reduce charge generation
  • Shield charges on clothing by using ESD Smocks

To continue reading ESD Control Program Considerations when Dealing with
Class Zero Items Click Here

Introducing Jewel® Workstation Mini Monitor

  • NEW Improved Banana Jack
    Creates a more consistent connection and helps to prevent accidental disconnects with operator’s wrist strap banana plug.
  • Replaces Item 99130
  • Can be used with any brand of single-wire wrist strap and cord
  • Single station Continuous Monitor for operator and ESD worksurface
  • Made in the United States of America
Item Description Price
99135 Jewel® Workstation Mini Monitor, 220VAC $132.09
Sign up HERE | Request a demo HERE | See list of sales reps and distributors HERE
All items & programmes are available through your participating distributor | Submit your questions HERE

Introducing Trustat ESD Products

Quality Products at an Economy Price!
Item Description Price
52017 Econo Wristband, Adj, 4mm $4.39
52018 Econo Coiled Cord, Adj, 4mm, Snap, 1 Meg, Black $4.56
52019 Econo Coiled Cord, 3.6M, 4mm, Snap, 1 Meg, Black $4.56
52020 Econo Wrist Strap, Adj, Blue, 1.8M Cord, 4mm Snap $5.79
52021 Trustat Wrist Strap, Adj, Blue , 1.8M Cord, 4mm Snap $5.79
52022 Ergoband Wrist Strap, Blue , 1.8M Cord, 4mm Snap $18.07
52026 Econo Wristband, Adj, 10 mm Snap, Cloth, Blue/Black $4.37
52027 Econo Coil Cord,1.8 m, 10 mm Snap, 1 Meg, Black $4.56
52028 Econo Coil Cord, 3.6 m, 10 mm Snap, 1 Meg, Black $4.56
52029 Econo Wrist Strap, Adj, Blue, Cloth, 1.8M, 10MM Snap $5.79
52030 Trustat Wrist Strap, Adj, Blue, 1.8 m, 10 mm Snap $5.79
52031 Ergoband Wrist Strap, Blue, 1.8 m, 10 mm Snap $18.07


“All personnel shall be grounded … when handling ESDS [ESD sensitive items]. When personnel are seated at ESD protective workstations, they shall be connected to ground via a wrist strap system.” [EN 61340-5-1 Edition 1 2007-08 clause 5.3.2 Personnel grounding] Where continuous monitoring is used, no additional testing is required.” [EN 61340-4-1, per A.5.2]


“The wrist band will normally be worn for several hours at a time so it needs to be comfortable while making good contact with the skin. It is a good idea to check the wrist strap every time it is applied. Constant on line monitors can be used so that any breaks will be immediately found.” [EN 61340-5-2 section 5.2.7]

Place an order HERE | Request a sample HERE | See list of sales reps and distributors HERE
All items & programs are available through your participating distributor | Submit your questions HERE