S p e z i a l e l e k t r o n i k G m b H
iseg Spezialelektronik GmbH
Email: [email protected]
Tel ++ 49 (0)351 / 26 996 - 0
Bautzner Landstr. 23
http://www.iseg-hv.de
Fax ++ 49 (0)351 / 26 996 - 21
8
D - 01454 Radeberg / Rossendorf
3.1 Operation states
The device has the following operation states:
-
POWER-ON Device initialises the connected Hardware (Booting)
-
LOCAL
Device is controlled with buttons and rotary encoders at the front panel
-
REMOTE
Device is remote controlled via interface (CAN, RS-232, IEEE-488)
The states LOCAL and REMOTE are further divided into:
-
HV-OFF
No high voltage is produced
-
HV-ON
High voltage according to Set values is produced
In the HV-ON state there are two modes for high voltage creation:
1. Voltage control CV:
Control of output voltage according to set value V
SET
(Output current I
OUT
< I
SET
), LED „CV“ lighting.
2. Current control CC (only with “Kill disable”):
Control of output current according to set value I
SET
(Output current V
OUT
< V
SET
), LED „CC“ lighting.
The KILL function is be set with the KILL/ESC button:
Disable: The output voltage will be limited after reaching I
SET
Enable: The yellow LED „KILL ENABLE” is lighting.
The output voltage will be shut off permanently without ramp, if I
OUT
≥
I
SET
.
The re-setting of the output voltage is possible after pushing button HV ON again.
3.2 Safety loop (Interlock)
The unit is equipped with a connector for a hardware safety loop (interlock) on the rear.
If the loop is closed an internal current source (open circuit voltage 15 V / short circuit current max.
40 mA) will drive a current of ca. 12 mA through the built-in safety relay.
That will work if the impedance of the closed loop is less than 200 Ohm.
If the safety loop is opened, the relay will be drop-out and the generation of high voltage will be
stopped without any semiconductor by the contacts of the safety relay only.
Caution: The internal and external capacities must be discharge about the load before the
output will be volt-free. The internal load is very high, so a very long discharging
time is possible according to the connected load.
The unit is not equipped with an active discharging circuit!
The safety loop is closed ex works with help of a wire strap.
It is not possible to switch on the high voltage generation if the loop is open.
If the loop will be closed again high voltage will be switch on with HV-ON on front panel or via the
digital interfaces only.
If chosen
AIF ON
in the menu F06 „
Control with analogue I/O automatically“
it is able to switch
on high voltage with
Low to High
on the
INHIBIT
pin of the analogue I/O too.