Tips for ESD Coordinator: Buying Your ESD Wrist Strap Continuous or Constant Monitor
ESD wrist straps are the first layer of ESD protection mechanism commonly used by the electronic industries to protect ESD sensitive parts or assemblies from ESD damage.
For critical environments such as hard disk drive, semiconductor and flat panel display manufacturing, it is very important to ensure the personnel who handle the ESD sensitive items are truly grounded.
Getting the wearers connected to the ESD wrist strap constant monitor is commonly practiced by most ESD Coordinator to give a real time indication that the wearers are connected to ground.
Does the ESD Wrist Strap Constant Monitor Meeting Your Company’s Expectations?
While there are many brands and types of ESD Wrist Strap Constant Monitor available in the market place, it is recommended to consider the following before buying the unit.
• Get a sample of the ESD Wrist Strap Constant Monitor from your nearby supplier
• Check its Technical Specification and analyze whether it both meets the ESD standard and your company expectations
• Perform functional test :
• Wear the ESD wrist strap and connected it to the ESD Wrist Strap Constant Monitor
• Check whether the light indicator illuminates when your wrist strap band firmly snug against your bare skin and the wrist strap cord is connected to the ESD Wrist Strap Constant Monitor
• Check whether the light indicator illuminates when you wear the wrist strap band over your ESD garment
• Without wearing the wrist strap and leave the wrist strap cord remains connected to the ESD Wrist Strap Constant Monitor
• Check whether the light indicator illuminates when your curl up the wrist strap cord
• Measure your body voltage by using a Charge Plate Monitor which is connected to a Graphical recorder or by using Prostat PGA 710 Auto Analysis system while wearing the wrist strap and remains connected to the ESD Wrist Strap Constant Monitor
• Check the reliability of the ESD Wrist Strap Constant Monitor whether it is a battery powered or AC powered unit
• Review the periodic testing and calibration requirements from the manufacturer of the ESD Wrist Strap Constant Monitor
A functional ESD Wrist Strap Constant Monitor is the unit where the light indicator illuminates only when the wrist strap band snug firmly against the wearer’s bare skin and with the wearer remains connected to the unit.
When you see the light indicator illuminates even without you wearing it or when you wear the wrist strap band over your glove or ESD garment, it is time for you to stop and think whether you should go ahead invest on the unit.
It is far better to remain checking the functionality of ESD wrist strap with the conventional ESD wrist strap checker than to invest on something that give you a faulty indication.
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