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

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

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

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 35000 volts A person walking on a vinyl floor 12000 volts A person on a padded chair up to 18000 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

Electro Static Discharge 02/12/2018 RADIOMETER PRESENTATION Electro Static Discharge TO FEEL IT -- 3500 volts or more TO HEAR IT -- 4500 volts or more TO SEE THE SPARK -- 5000 volts or more

Component damaging Voltage Levels 02/12/2018 RADIOMETER PRESENTATION Component damaging Voltage Levels Device type Range of ESD Vulnerability (volts) VMOS 30-1800 MOSFET 100-200 EPROM 100 JFET 140-7000 SAW 150-500 OP AMP 190-2500 CMOS 250-3000 Diodes 300-2500 The range where a injury can occur. Bipolar Transistors 380-7000 TTL 1000-2500 Reference: Radiometer ESD book, code number 919-553 Radiometer Medical ApS 2 December, 2018

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

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:

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

02/12/2018 RADIOMETER PRESENTATION Grounding Example 1

02/12/2018 RADIOMETER PRESENTATION Grounding Example 2

02/12/2018 RADIOMETER PRESENTATION Grounding Example 3

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

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

02/12/2018 RADIOMETER PRESENTATION Cleaning ESD Vacuum cleaner

RADIOMETER ESD stock items 02/12/2018 RADIOMETER PRESENTATION RADIOMETER ESD stock items 3M bench mat type 8214 -R- part no. 993-072 3M field kit type 8501 -R- part no. 993-073 3M wrist band type 2204 -R- part no. 920-716 3M cord for 2204, 1.5 m -R- part no. 617-925 3M cord for 2204, 3 m -R- part no. 617-926 3M bag 150 x 250 mm -R- part no. 955-053 3M bag 200 x 300 mm -R- part no. 955-054 3M bag 250 x 350 mm -R- part no. 955-055 3M bag 350 x 450 mm -R- part no. 955-056

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

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

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