14
NSG 435 ESD simulator
3.2.2 Block diagram
The function units are shown in the block diagram:
The microprocessor controls and monitors all the generator functions:
Keypad entries are checked for plausibility. Unacceptable entries are rejected
and an acoustic warning notifies the user of the error.
Values entered are clearly shown on the large display screen. Further infor-
mation shows the operating status and the counter settings.
The battery charge state is continuously monitored. A tendency towards low
voltage is shown on the display. The instrument’s functions are inhibited
once the battery voltage is insufficient to guarantee the pulse parameters.
High voltage
generator
Test
finger
µP Control unit
±10.0 kv
Buzzer
Display
Trigger button
Ext. trigger
Batt / Mains PSU
Discharge
network
High voltage
relay
Measurement
circuit
