iseg VHQ 202M, Operator'S Manual

Page: 2 / 12

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: sales@iseg-hv.de Phone ++ 49 351 / 26 996 - 0
Bautzner Landstr. 23 http://www.iseg-hv.com Fax ++ 49 351 / 26 996 - 21
D - 01454 Radeberg / Rossendorf Germany 2
1. General information
The VHQ´s are two channel high voltage supplies in 6U VME format, 164 mm deep, double width. The units
offers manual control and operation via VME bus. The use of the VME interface supports more then the manual
control functionality.
The high voltage supplies special provide high precision output voltage together with very low ripple and noise,
even under full load. Separate 10%-steps hardware switches put voltage and current limits. An INHIBIT input
protects connected sensitive devices. Additionally, the maximal output current per channel is programmable via
the interface. The high voltage outputs protected against overload and short circuit. The output polarity can be
switched over. The HV-GND is connected to the chassis and the powering GND.
2. Technical data:
VHQ two channel 202 M 203 M 204 L 205 L
Output voltage V
O
0 ... 2 kV 0 ... 3 kV 0 ... 4 kV 0 ... 5 kV
Output current per channel I
O
0 ... 3 mA 0 ... 2 mA 0 ... 1 mA 0 ... 1 mA
with option M - h 0 ... 6 mA 0 ... 4 mA 0 ... 3 mA 0 ... 2 mA
with option _104 100 µA 100 µA 100 µA 100 µA
Ripple typ. < 0,5 mV
P-P
< 0,5 mV
P-P
< 1 mV
P-P
< 2 mV
P-P
max. 2 mV
P-P
2 mV
P-P
2 mV
P-P
5 mV
P-P
Stability
∆
V
O
<5
∗
10
-5
(idle to max. load)
∆
V
O
/
∆
V
INPUT
<5
∗
10
-5
Temperature coefficient
<5
∗
10
-5
/K
LCD Display 4 digits with sign, switch controlled
voltage display in [V] / current display in [µA]
Resolution of measurement
Current: 1 µA, with option _104 : 100 nA
Voltage: 1 V
Accuracy current measurement
±
(0,05% I
O
+ 0,02% I
O max
+ 1 digit) (for one year)
Accuracy voltage measurement
±
(0,05% V
O
+ 0,02% V
O max
+ 1 digit) (for one year)
Voltage CONTROL switch in upper position: 10 - turn potentiometer
control lower position (DAC): control via interface
Rate of change of hardware ramp 500 V/s (on HV-ON/ -OFF)
output voltage software ramp: 2 . . . 255 V/s
Protection - separate current and voltage limit
(hardware, rotary switch in 10%-steps)
- INHIBIT (ext. signal TTL-level,
Low = active
⇒
V
OUT
=0)
- programmable current limit (software)
Current trip reaction time < 60 ms
Power requirements V
INPUT
±
12 V ( < 850 mA, with option M - h < 1,6 A )
+ 5 V ( < 300 mA)
Packing VME #2 / 6U / 164 mm deep
Connector 96-pin VME connector according to DIN 41612
HV connector SHV-Connector at the front panel
INHIBIT connector 1-pin Lemo-hub
Operating temperature 0 ... +50 °C
Storage temperature -20 ... +60 °C
VHQ 205L
2 x 5 kV / 1 mA