The unit is powered up with the mains switch on back panel. After Power Up the unit is initialised and a brief function test of the
hardware is performed. The display will show manufacturer, serial number, nominal voltage and nominal current.
After a successful function test the unit is in standby mode.
CAUTION!
CAUTION
If the HV-ON switch is in position “ON” and CONTROL switch is in upper position
(manual control), at the HV-output on the rear side high voltage is generated according to the set
voltage chosen via the 10-turn potentiometer with a ramp speed of 500 V/s (hardware ramp).
INFORMATION
INFORMATION
After powering up the device on an AC line voltage of 110 V-AC ± 10% there is a 10 s delay until standby
mode!
High voltage output is switched on with HV-ON switch at the front panel. This condition is indicated by the yellow LED above the
switch.
Further control is depending on position of the CONTROL switch.
3.2.1 Manual control (“CONTROL” in upper position)
In the manual control mode the output voltage can be set via 10-turn potentiometer from 0V to the maximum voltage. The
final position of the potentiometer equals maximum output voltage.
CAUTION!
CAUTION
If the HV-ON switch is switched into position “ON” and CONTROL switch is in upper position
(manual control), at the HV-output on the rear side high voltage is generated according to the set
voltage chosen via the 10-turn potentiometer with a ramp speed of 500 V/s (hardware ramp).
The effective values for voltage and current are indicated on the two line display. The type of display can be selected by tripping
the switch next to the 2 line LCD display. Voltages and / or currents are displayed with the resolution of voltage- and current
measurement of the corresponding SHQ series device. The polarity of the output voltage is also indicated.
3.2.2 Remote control (“CONTROL” in lower position)
If the CONTROL switch is in lower position (DAC), high voltage will be activated only after receiving corresponding RS232
commands. There are several commands offering an enhanced control in comparison to front panel control, such as:
• voltage ramp
The ramp speed of the output voltage can be chosen in a range of 2V/s to 255V/s
• current trip
current trip sets a current threshold. If the threshold is reached the channel will be switched off.
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