EM TEST
VDS 200 Series
Manual for Operation
V 5.19
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2.6. Safety with voltage setting
To ensure a safe operation of the DUT (Device Under Test) some restrictions in the operation of the instrument
are built in. These restrictions are explained within this paragraph.
The VDS basically is divided into 2 different operation modes, which includes their individual test routines and
supply voltage setting. The four different modes can be listed as follows:
DC Source
(VDS Generator - User Test Routines - DC Source)
Within this mode the VDS is used as a simple DC power source in the range of 0-60V // 0-15A // 30A // 50A //
100A // 200A and an integrated current limiter.
Arbitrary Wave Simulator
Within this mode the VDS generates arbitrary waveforms and signals which are specified in different standards,
such as pulse 4 of ISO 7637.
All these different test modes are changing generally the voltage supply setting of the generator in a different
way. This would mean a certain risk for the operator to burn out the connected DUT by higher dc supply voltages
as intended. Therefore it is decided to clearly separate the two test modes by the following structure listed :
1. DC source
When entering the Arbitrary Wave test mode the dc output voltage of the VDS 200 is automatically set to the
nominal voltage of the DUT. The actual nominal voltage can be defined in the service menu under "Set-up".
When starting the related test routines the output voltage will be generated as per the setting shown up in the
display for each individual test routine.
- The operator can accept this setting and start the test immediately .
- The operator can first change the parameters and than start the test.
When leaving the test mode DC source the output voltage is automatically reset to the nominal supply voltage of
the DUT. The previous voltage setting will be stored in the test file.
2. Arbitrary Wave Simulator
When selecting the Arbitrary Wave mode the output voltage will be set automatically to the nominal voltage of the
DUT. The actual nominal voltage can be defined in the service menu under "Set-up".
When starting the related test routines the output voltage will be generated as per the setting shown up in the
display for each individual test routine.
- The operator can accept this setting and start the test immediately.
- The operator can first change the parameters and then start the test.
When leaving the test mode Arbitrary Wave Simulator the output voltage is automatically reset to 0V. The
previous voltage test parameters will be stored and can be used for the next test.
The consequence of the structure is that between the different test modes
the DUT supply is automatically switched off.
