!
MENU
Toggle navigation
Products
Pump & Bottle Sets
Cone Top Bottles
Wash Bottles
Trigger Sprayer Bottles
Flux Dispensers
One-Touch Dispensers
Glass Bottle
HDPE (High Density Plastic) Bottle
Tin-Plate Bottle
Lasting-Touch Dispensers
HDPE (High Density Plastic) Bottles
Glass Bottles
Pure-Take Locking Dispensers
HDPE (High Density Plastic) Bottle
Glass Bottle
Tin-Plate Bottle
Pure-Touch Dispensers
Glass Bottle
HDPE (High Density Plastic) Bottle
Take-Along Locking Dispensers
HDPE (High Density Plastic) Bottle
Glass Bottle
Twist-Lock Locking Dispensers
Black Pump
Purple Pump
White Pump
Pump & Bottle Accessories
Replacement Stems
Bottle Closures
Replacement Needles
Pumps Only
Lasting-Touch Pump
One-Touch Pump
Pure-Touch Pump
Pure-Take Locking Pump
Take-Along Locking Pump
Twist-Lock Locking Pump
Bottles Only
HDPE (High Density Plastic)
Blue durAstatic®
Green durAstatic®
Orange durAstatic®
Pink
Purple
White (No Colors Added)
Yellow durAstatic®
Badge & ID Holders
Color Badge Holders
Clear Vinyl Badge Holders
Shielded Badge Holders
Arm Badge
Badge Reels, Lanyards, & Strap Clips
Cable Management
Cable Control
Connector Covers & Dust Caps
Circular Connectors
D-Sub Connectors
Document Holders
With Zipper
No-Zipper
Drinking Cup
Fume Extractors
Series II System (1-2 Operators)
Complete System
Accessories
Replacement Filters
Hand & Power Tools
Cleaning Brushes
Conductive (Black Bristles)
Dissipative (Yellow Nylon Bristles)
Circuitracer™ Continuity Tester
IC Tube End Plug Extractor
Probes & Spudgers
Nylon
Steel
Wood
Screw Removal Pliers
Sleeve & Tubing Cutter
Small Nut Starter
Tool Storage
Wire & Harness Threader
Lotion
Probes, Spudgers, Soldering Aids
Double Ended Soldering Aids
Orange Sticks
Probes and Spudgers
Soldering Aid Kits
Soldering & Rework
Desoldering Braid
Lead-Free
One-Step
Quick Braid
Sea Braid
Solder Tip Cleaners
Stencil Rolls & Wipes
DEK
EKRA
MPM
YAMAHA
Vacuums
Blow Vac
ESD Service Vacuum
HEPA Vac
Workstation Organizers
Overstock & Clearance Deals
EasyBraid Products
ID & Vinyl Products
MENDA Pump Dispensers
Specialty Tools & Accessories
Workstation Organizers
Vacuums
ESD Products
ESD Liquid Dispenser
ESD durAstatic® Bottles Only
ESD Badge Holders
ESD Brushes
ESD Cable Control
ESD Conductive Connector Covers
ESD Drinking Cup
ESD Flux Bottles
ESD Fume Extractor & Accessories
ESD Lotion
ESD Workstation Organizers
ESD Document Holders
ESD Testers, Probes & Tools
ESD Vacuums & Accessories
ESD Clearance & Overstock
Beau Tech Products
Cleaning Brushes
Double Ended Soldering Aids
Hand Tools
Orange Sticks
Probes and Spudgers
Soldering Aid Kits
EasyBraid Products
Desoldering Braid
Stencil Rolls
Solder Tip Cleaners
WickGun Desoldering Braid Dispenser
Badge & ID Holders
Clear Vinyl Badge Holders
Color Badge Holders
Document Holders
Horizontal Badges
Vertical Badges
Proximity Card Badge Holders
Multi-Card Badge Holders
Shielded Badge Holders
Event Badge Holders
Flap Closure Badge Holders
Zipper Closure Badge Holders
Arm Badges
Badge Reels
Strap Clips
Lanyards
Resources
Videos
REGISTER / LOGIN
SHOP
RPL
CART (
0
)
Questions And Answers
#
360
List All Questions
Search
List by Category
Question
How do I give an examples on each the following: 4 factors affecting static generation are: 1) Types of material 2) Humidity 3) Speed 4) Presure of contact -Anonymous, Ampang, Malaysia
Answer
1) Types of material Look at the triboelectric series chart.
2) Humidity Read our paper on Humidity and ESD Control, specifically looking at Table I Tribocharging and Relative Humidity (RH)
3) Speed Read our paper on “ESD DISCHARGE TIMES: Controlling your Discharges”, specifically the tables and graph
4) Pressure of contact This has a direct effect on the resulting contact resistance, which will have a large correlation to the measured surface resistance. The standard ANSI/EOS/ESD-S4.1-1990 ESD Protective Worksurfaces, Resistive Characterization, specifies a specific meter and probe system where the weight of the probes is held constant as well as the material construction (5 pound gravitation force) having a certain durometer (durometer hardness of 50 ±10): 6.1.1 Resistance Measuring Apparatus Self-contained resistance meter or meters or power supplies and current meters in the appropriate configuration for resistance measurement with ±10% accuracy. For safety, all power supplies should be current limited, usually below 5.0 milliamperes. 6.1.1.1 For the material evaluation tests of 6.2, this apparatus shall be capable of open circuit voltages of of 10 ±1 volts and 100 ±10 volts, and capable of reading resistance values from 1.0 X 10
5
ohms to 1.0 X 10
11
ohms. 6.1.1.2 For the installed worksurface tests of 6.3 and 6.4, this apparatus shall be capable of an open circuit voltage of 100 ±10 volts, and capable of reading resistance values at least a factor of ten higher and a factor of ten lower than the expected resistance values of the worksurface. In addition, both test leads should be isolated from ground. 6.1.2 Electrodes Two cylindrical 2.27 kg (5 pound) electrodes with a diameter of 63.5 mm (2.5 inches) each having contacts of electrically conductive material with a thickness of 0.25" and Shore-A (IRHD) durometer hardness of 50 ±10. The resistance between the two electrodes should be less than 100 kilohms when measured at 10 volts on a metallic surface. Standard electrodes constructed in accordance with ASTM F-150 can easily be modified to achieve these characteristics.
Related Categories:
Discharge Times
Humidity
Tribocharging
If you have found this Q/A useful, please rate it based on its helpfulness.
This question has been rated:
(
0
% at
0
Ratings)
This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Review our
Cookies Policy
for more information.
Accept