Operating Instructions_VF335_en.pdf - 第688页

ESD-Certi ficate Ersa GmbH, Leon hard-Karl-Str. 2 4, 97877 WE RT HEIM page 4 of 6 1.2.1 Used ES D Instru ments referri ng to IEC 61340-x-y High ohmic meaureme nt: TERA Ohm meter TOM TF 600 ref. DIN EN 61340-x-y voltage :…

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ESD-Certificate
Ersa GmbH, Leonhard-Karl-Str. 24, 97877 WERTHEIM
page 3 of 6
1.1 Declaration and normative guidelines:
Tools: Hand pieces or coating, holders and fixing elements, trays,
attachments, and others need to be produced out of materials with a
R
O
/R
A
– resistance between 10
4
and 10
8
Ohms.
Elements of machines and systems directly in contact with conductive
parts of components or assemblies must consist of electrostatic
discharging material (R
O
/R
A
10
4
– 10
8
Ohm) and have a direct connection
to the Earth Bonding Point.
1.2 Humidity
humidity is influencing the conductivity of many materials. Beginning
with an air humidity <40%rh the tendency of material surface charging is
rising. At the same time the surface conductivity is decreasing. In
consequence high electrostatic potentials can built up. Without air
condition systems with humidity control the air humidity in heated
production areas can drop below 20%rh!
High ohmic measures will be affected to smaller values when the air
humidity is rising above 60%rh.
EN 61340-5-2 recommends in 1.5 values >40%rh and
EN 61340-5-2 appendix B1.2 requests an environment during
measurement (mainly laboratoy measures) of 50+-3%rh, but also reviews
to practical measurement situations:
Temperature and relative humidity need to be noted:
humidity: 41 %rh
temperature: + 20 °C
ESD-Certificate
Ersa GmbH, Leonhard-Karl-Str. 24, 97877 WERTHEIM
page 4 of 6
1.2.1 Used ESD Instruments referring to IEC 61340-x-y
High ohmic meaurement:
TERA Ohm meter TOM TF 600 ref. DIN EN 61340-x-y
voltage : 10V / 100V
measuring range: 2,0 x 10
4
Ohm – 1,0 x 10
13
Ohm
precision: +- 1,0 x 10
x
Ohm
measuring electrode ref. IEC 61340-2-3
weigth: 2,5 kg
diameter: 63 mm
surface: Shore A, < 1kOhm
Electrical field measurement:
Elektric filed meter EFM 022
measuring range: 1cm 0 – 8kV max resolution 1V
2cm 0 – 16kV max resolution 3V
5cm 0 – 40kV max resolution 10V
10cm 0 – 80kV max resolution 10V
20cm 0 – 160kV max resolution 20V
ESD-Certificate
Ersa GmbH, Leonhard-Karl-Str. 24, 97877 WERTHEIM
page 5 of 6
1.3 Abbreviations
ESD: Electro Static Discharge
EPA: Electro Static Discharge Protected Area
ESDS: Electro Static Discharge sensitive Device
PE: Potential Earth
R
A
: bleeder resistance in Ohm (measure to PE)
R
O
: Surface resistance in Ohm ( 2 point measuring)
R
S
: sysstems beeder resistance
EBP: Earth Bonding Point
CDM: Charged Device Model
HBM: Human Body Model
ESD packing ref. IEC 61340-5-1
Low Charging
Elektrostatic (shielding)
Elektrostatic (conductive)
Elektrostatic (dissipative)
Isolating