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5.1.1 Software trip function
It is possible to turn off High voltage when reaching the preset current limit (KILL enable). This function can only be used with the
computer interface. The delay for detecting a trip is about 50…100 ms.
If KILL is enable (KILL is shown in Display), the high voltage will shut down if the current limit is achieved. In this case, the bit TRIP
in the status word is set. This bit can be cleared by setting the KILL function again (Tn
2 =1) or by disabling KILL (Tn 3 =0). In both
cases, the high voltage has to be set again (V
set
is set to zero at Trip).
By switching to mode local, the KILL function is turned off (KILL disable). A pending Trip is cleared by switching
HV-ON/OFF
➜
OFF
➜
ON.
5.1.2 Polarity switching
The output voltage polarity can be changed with the POLARITY switch at front panel, over analogue I/O or with the computer
interface (with command Pn
3 ) if V
out
= 0 V. Previously, set the voltage to zero and control the discharge process.
CAUTION!
CAUTION!
Don’t switch POLARITY when displayed voltage is greater than 100 V!
The chosen polarity is signalled by the corresponding status LED at the front panel and can be requested over computer interface
with the command Pn
3 .
For safety purposes, the high voltage generation is stopped for about one second before the polarity is switched. After another
second, the device is operating again.
If the control mode is switched to analogue I/O („REM“) with button
REMOTE/LOCAL and Pin 5 at the AIO connector(see section
11 Connectors and 12 AIO connector pin assignments) is not connected, the device switches to positive polarity.
5.1.3 Autostart function
With active Autostart, the device switches to mode computer remote control after power-up and restores the last settings of
voltage and current. The Autostart function can be activated for every channel separately (with command An
3 ).
CAUTION!
CAUTION!
•
If the switch "HV ON/OFF" is set to ON,
•
and no external INHIBIT is applied
the high voltage generation starts automatically!
6 Reset to factory settings
If the button HV-ON/OFF is set to OFF and REMOTE/LOCAL is pressed during power-on, the following settings are reset:
•
Saved voltage for computer interface to zero
•
Saved current for computer interface to nominal current
•
Operating mode local
•
compatibility mode off
2 „n“ - Number of the channel
3 „n“ - Number of the channel
THQ Systems - CONFIGURABLE AC/DC LABORATORY HV SUPPLY | Last modified on: 2022-04-21 | www.iseg-hv.com 16/41