1. ESD Protection
02/12/2018
Radiometer Medical ApS
2 December, 2018

2. Electro Static Discharge (ESD)
02/12/2018
RADIOMETER PRESENTATION
Electro Static Discharge (ESD)

3. Electro Static Charge and Discharge Fundamentals
02/12/2018
RADIOMETER PRESENTATION
Electro Static Charge and Discharge Fundamentals
Whenever there is movement, static charge is produced
Static charge is caused by an excess or deficiency of electrons collected on a surface
Electro Static Discharge is the rapid flow of charge between two objects

4. When Is a Static Charge Present?
02/12/2018
RADIOMETER PRESENTATION
When Is a Static Charge Present?
A person walking on a carpet up to volts
A person walking on a vinyl floor volts
A person on a padded chair up to volts
Styrofoam coffee cup up to 5000 volts
Plastic or scotch tape up to 5000 volts
Vinyl covered notebook (Service Manual) up to 8000 volts

5. Electro Static Discharge
02/12/2018
RADIOMETER PRESENTATION
Electro Static Discharge
TO FEEL IT volts or more
TO HEAR IT volts or more
TO SEE THE SPARK volts or more

6. Component damaging Voltage Levels
02/12/2018
RADIOMETER PRESENTATION
Component damaging Voltage Levels
Device type
Range of ESD Vulnerability (volts)
VMOS
MOSFET
EPROM
100
JFET
SAW
OP AMP
CMOS
Diodes
The range where a injury can occur.
Bipolar Transistors
TTL
Reference: Radiometer ESD book, code number
Radiometer Medical ApS
2 December, 2018

7. Electro Static Discharge
02/12/2018
RADIOMETER PRESENTATION
Electro Static Discharge
90 % That are damaged by ESD are Zinged
10 % That are damaged by ESD are Zapped.
Zinged:
Components’ life span is reduced
Operating Characteristic changed (intermittent failures)
Temperature sensitivity
Zapped:
- Component totally destroyed

8. ESD Protected Area Static Dissipative Bench Mat ESD protected floor
02/12/2018
RADIOMETER PRESENTATION
ESD Protected Area
Static Dissipative Bench Mat
ESD protected floor
Wrist Strap (1MΩ)
Look for the sign:

9. General Requirements Instrument for repair must be grounded
02/12/2018
RADIOMETER PRESENTATION
General Requirements
Instrument for repair must be grounded
Service person must have wrist strap connected
Mains supplied test instruments must be grounded
Solder iron must be grounded
Discharge tools on bench mat before use
Clean up
Make ESD protected area visible
Train the personnel
Check facilities regularly

10. 02/12/2018
RADIOMETER PRESENTATION
Grounding Example 1

11. 02/12/2018
RADIOMETER PRESENTATION
Grounding Example 2

12. 02/12/2018
RADIOMETER PRESENTATION
Grounding Example 3

13. Working Instructions Perform grounding (instrument, person, bench mat)
02/12/2018
RADIOMETER PRESENTATION
Working Instructions
Perform grounding (instrument, person, bench mat)
Dismantle instrument
Unpack replacement board and mount in instrument
Place faulty/suspect board in ESD protected bag
Remount instrument case

14. 02/12/2018
RADIOMETER PRESENTATION
Inventory / Transport
ESD sensitive devices will be delivered in protected bags or boxes
ESD sensitive devices must be kept in protected bags or boxes outside protected area
Unprotected ESD sensitive devices must be rejected

15. 02/12/2018
RADIOMETER PRESENTATION
Cleaning
ESD Vacuum cleaner

16. RADIOMETER ESD stock items
02/12/2018
RADIOMETER PRESENTATION
RADIOMETER ESD stock items
3M bench mat type R- part no
3M field kit type R- part no
3M wrist band type R- part no
3M cord for 2204, 1.5 m -R- part no
3M cord for 2204, 3 m -R- part no
3M bag 150 x 250 mm -R- part no
3M bag 200 x 300 mm -R- part no
3M bag 250 x 350 mm -R- part no
3M bag 350 x 450 mm -R- part no

17. 02/12/2018
RADIOMETER PRESENTATION
Implementation
Manufacturing and stocking facilities in Copenhagen, January 15, 1993
Distributors service and stocking facilities, May 15, 1993

18. Questionnaire Have you implemented ESD protection in your company ?
02/12/2018
RADIOMETER PRESENTATION
Questionnaire
Have you implemented ESD protection in your company ?
Yes No
Have the person responsible for your stock received training
in ESD ?
Yes No
Have you got ESD protected areas in your workshop ?
Yes No
Have you got portable ESD protection equipment ?
Yes No
Do you feel that you now have enough information to
implement ESD protection in your company ?
Yes No

19. End of Session
02/12/2018
Radiometer Medical ApS
2 December, 2018