15
The high voltage generation is dynamically controlled by the processor.
Varying load conditions, supply voltages, etc. can thus be taken into account
and have no effect on the pulse parameters.
The instrument switches itself off automatically if it is not used for a while.
The pulse parameters and operating mode remain stored and ready for use
once the simulator is switched on again.
The charge voltage to the network is kept constant as long as the trigger is
active. The high voltage is discharged internally when the trigger is reset.
If no discharge occurs when set for an air-discharge and the trigger is active,
the processor waits for about 15 s then autonomously resets the trigger
and discharges the network internally. An acoustic warning is also sounded.
A measurement facility at the pulse output measures the actual air-voltage
reached during an air-discharge and shows the result on the display.
Pulse triggering is monitored. Once an arc has occurred the network is
discharged internally so that no further arcing is possible.
3.2.3 Operating elements
Apart from the trigger button itself (pulse triggering) all the operating elements
are on the surface of the instrument that faces the operator.
The NSG 435 is switched on/off with the main switch.
The significance of the elements in the display field can be seen in the following
picture. Further information can be found in section 5 «Operation».
Operation of the whole instrument is effected via the five multifunction buttons
(soft-keys). These buttons perform different functions depending on the stage
of operation. The current function is shown on the display in each case.
The designation F1 to F5 used for these buttons in the following notes serve to
simplify the descriptions in this manual.
Содержание NSG 435
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