ELVO E911D/E911A/E912A
11
2.7.1
ESD - Working place overview
Clean-o-point
24 V AC
appr
ox. 100 k
Ω
Soldering ir
on
Antistatic working floor (isoelectric)
Potential equalization
(workshop inter
nal)
Rv
Mains supply
Mains transformer
Galvanic separation
Conducting rubber feet
appr
ox. 10
Ω
- 2k
Ω
Soldering station
ESD wristlet
Clean-o-point and soldering
station have the same potential
as the working base
Tip point
(same potential
as soldering station
and working base)
Hand lever (10 - 50 k
Ω
) ther
eby
no shock dischar
ge of the user
(same potential is adjusted
automatically)
Antistatic working base
Additional potential equalization possible
22
ELVO E911D/E911A/E912A
DIAGRAMS
7
7.1
BLOCK DIAGRAM E911D
0
20
40
60
80
100 %
IST
Mains supply
T
ransformer
Separate mains transformer
Zero voltage detector
Switch
Heat display
Soldering ir
on
Heater element
Te
mp. - Sensor
Controller
Comparator
N
ominal/Actual display
Standby
Nominal
Mains r
e
mote
contr
ol
Rectifier
Potential equalization
on housing and
working base
Connector
Tip point
Soldering station