Constant Current Operation - SCHNIER smart-E 310 Operating Manual

7.5.2.
Closed control circuit system with direct feedback of the actual value of the high volt-
age current to a control device. Operating current is thereby held constant, the high
voltage output varies the load dependency between a minimum and maximum process
defined value.
NOTE this operating mode is typically labeled with I
To work in this operating mode the target value I Limit must be set lower than the target
value I max.
Operating manual 810378-BAL-EN-170330

Constant current operation

In constant current operating mode, check for safe switch off of
the high voltage supply.
The switch off threshold U
conditions into consideration, then be determined and docu-
mented.
Check that high voltage is switched off if an unauthorized drop
in voltage causes it to go below the switch off threshold value
U .
min
During first inspection check the determined threshold value I
It is not permitted to have a threshold value U
ardous discharges or electrical arc between high voltage lead-
ing and grounded parts of the system can be calculated on, if
the permitted safety distance is not achieved.
.
k
must take local and operational
min
Mach/30 2017
.
ü
, where haz-
min
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